Patent application number | Description | Published |
20130052792 | HIGH PERFORMANCE DIELECTRIC STACK FOR DRAM CAPACITOR - A method for fabricating a DRAM capacitor stack is described wherein the dielectric material is a multi-layer stack formed from a highly-doped material combined with a lightly or non-doped material. The highly-doped material remains amorphous with a crystalline content of less than 30% after an annealing step. The lightly or non-doped material becomes crystalline with a crystalline content of equal to or greater than 30% after an annealing step. The dielectric multi-layer stack maintains a high k-value while minimizing the leakage current and the EOT value. | 02-28-2013 |
20130056851 | Molybdenum Oxide Top Electrode for DRAM Capacitors - A metal oxide bilayer second electrode for a MIM DRAM capacitor is formed wherein the layer of the electrode that is in contact with the dielectric layer (i.e. bottom layer) has a desired composition and crystal structure. An example is crystalline MoO | 03-07-2013 |
20130071986 | PARTIAL ETCH OF DRAM ELECTRODE - A method for fabricating a dynamic random access memory (DRAM) capacitor stack is disclosed wherein the stack includes a first electrode, a dielectric layer, and a second electrode. The first electrode is formed from a conductive binary metal compound and the conductive binary metal compound is first etched and then annealed in a reducing atmosphere or an inert atmosphere to promote the formation of a desired crystal structure and to remove oxygen rich compounds. The binary metal compound may be a metal oxide. Etching the metal oxide (i.e. molybdenum oxide) may result in the removal of oxygen rich phases and the formation of a first electrode material (i.e. MoO | 03-21-2013 |
20130071987 | Band Gap Improvement In DRAM Capacitors - A method for forming a DRAM MIM capacitor stack having low leakage current and low EOT involves the use of an compound high k dielectric material. The dielectric material further comprises a dopant. One component of the compound high k dielectric material is present in a concentration between about 30 atomic % and about 80 atomic % and more preferably between about 40 atomic % and about 60 atomic %. In some embodiments, the compound high k dielectric material comprises an alloy of TiO | 03-21-2013 |
20130071988 | INTERFACIAL LAYER FOR DRAM CAPACITOR - A method for reducing leakage current in DRAM capacitor stacks by introducing dielectric interface layers between the electrodes and the bulk dielectric material. The dielectric interface layers are typically amorphous dielectric materials with a k value between about 10 and about 30 and are less than about 1.5 nm in thickness. Advantageously, the thickness of each of the dielectric interface layers is less than 1.0 nm. In some cases, only a single dielectric interface layer is used between the bulk dielectric material and the second electrode. | 03-21-2013 |
20130071989 | SINGLE-SIDED NON-NOBLE METAL ELECTRODE HYBRID MIM STACK FOR DRAM DEVICES - A method for forming a DRAM MIM capacitor stack having low leakage current and low EOT involves the use of a first electrode that serves as a template for promoting the high k phase of a subsequently deposited first dielectric layer. The first high k dielectric layer comprises a doped material that can be crystallized after a subsequent annealing treatment. An amorphous, doped high k second dielectric material is form on the first dielectric layer. The dopant concentration and the thickness of the second dielectric layer are chosen such that the second dielectric layer remains amorphous after a subsequent annealing treatment. A second electrode layer compatible with the second dielectric layer is formed on the second dielectric layer. | 03-21-2013 |
20130093051 | Asymmetric MIM Capacitor for DRAM Devices - A bilayer second electrode for a MIM DRAM capacitor is formed wherein the layer of the electrode that is in contact with the dielectric layer (i.e. bottom layer) has a composition that is resistant to oxidation during subsequent anneal steps and have rutile templating capability. Examples include SnO | 04-18-2013 |
20130113079 | Blocking Layers for Leakage Current Reduction in DRAM Devices - A method for forming a DRAM MIM capacitor stack having low leakage current involves the use of a first electrode that serves as a template for promoting the high k phase of a subsequently deposited dielectric layer. The high k dielectric layer comprises a doped material that can be crystallized after a subsequent annealing treatment. An amorphous blocking is formed on the dielectric layer. The thickness of the blocking layer is chosen such that the blocking layer remains amorphous after a subsequent annealing treatment. A second electrode layer compatible with the blocking layer is formed on the blocking layer. | 05-09-2013 |
20130115750 | BLOCKING LAYERS FOR LEAKAGE CURRENT REDUCTION IN DRAM DEVICES - A method for forming a DRAM MIM capacitor stack having low leakage current involves the use of a first electrode that serves as a template for promoting the high k phase of a subsequently deposited dielectric layer. The high k dielectric layer comprises a doped material that can be crystallized after a subsequent annealing treatment. An amorphous blocking is formed on the dielectric layer. The thickness of the blocking layer is chosen such that the blocking layer remains amorphous after a subsequent annealing treatment. A second electrode layer compatible with the blocking layer is formed on the blocking layer. | 05-09-2013 |
20130119512 | Top Electrode Templating for DRAM Capacitor - A method for forming a DRAM MIM capacitor stack having low leakage current involves the use of a first electrode that serves as a template for promoting the high k phase of a subsequently deposited dielectric layer. The high k dielectric layer comprises a doped material that can be crystallized after a subsequent annealing treatment. A metal oxide second electrode layer is formed above the dielectric layer. The metal oxide second electrode layer has a crystal structure that is compatible with the crystal structure of the dielectric layer. Optionally, a second electrode bulk layer is formed above the metal oxide second electrode layer. | 05-16-2013 |
20130119513 | Adsorption Site Blocking Method for Co-Doping ALD Films - A method for doping a dielectric material by pulsing a first dopant precursor, purging the non-adsorbed precursor, pulsing a second precursor, purging the non-adsorbed precursor, and pulsing a oxidant to form an intermixed layer of two (or more) metal oxide dielectric dopant materials. The method may also be used to form a blocking layer between a bulk dielectric layer and a second electrode layer. The method improves the control of the composition and the control of the uniformity of the dopants throughout the thickness of the doped dielectric material. | 05-16-2013 |
20130119515 | METHOD FOR FABRICATING A DRAM CAPACITOR HAVING INCREASED THERMAL AND CHEMICAL STABILITY - A method for fabricating a dynamic random access memory (DRAM) capacitor includes forming a first electrode film. The first electrode film comprises a conductive binary metal compound and a dopant. The dopant may have a uniform or non-uniform concentration within the first electrode film. A high-k dielectric film is formed over the first electrode film. A second electrode film is formed over the dielectric film. The second electrode film comprises a conductive binary metal compound and a dopant. The dopant may have a uniform or non-uniform concentration within the second electrode film. The dopants and their distribution are chosen so that the crystal structure of the surface of the electrode is not degraded if the electrode is to be used as a templating structure for subsequent layer formation. Additionally, the dopants and their distribution are chosen so that the work function of the electrodes is not degraded. | 05-16-2013 |
20130122678 | ADSORPTION SITE BLOCKING METHOD FOR CO-DOPING ALD FILMS - A method for doping a dielectric material by pulsing a first dopant precursor, purging the non-adsorbed precursor, pulsing a second precursor, purging the non-adsorbed precursor, and pulsing a oxidant to form an intermixed layer of two (or more) metal oxide dielectric dopant materials. The method may also be used to form a blocking layer between a bulk dielectric layer and a second electrode layer. The method improves the control of the composition and the control of the uniformity of the dopants throughout the thickness of the doped dielectric material. | 05-16-2013 |
20130122681 | TOP ELECTRODE TEMPLATING FOR DRAM CAPACITOR - A method for forming a DRAM MIM capacitor stack having low leakage current involves the use of a first electrode that serves as a template for promoting the high k phase of a subsequently deposited dielectric layer. The high k dielectric layer comprises a doped material that can be crystallized after a subsequent annealing treatment. A metal oxide second electrode layer is formed above the dielectric layer. The metal oxide second electrode layer has a crystal structure that is compatible with the crystal structure of the dielectric layer. Optionally, a second electrode bulk layer is formed above the metal oxide second electrode layer. | 05-16-2013 |
20130122682 | ANNEAL TO MINIMIZE LEAKAGE CURRENT IN DRAM CAPACITOR - A method for forming a DRAM MIM capacitor stack comprises forming a first electrode layer, annealing the first electrode layer, forming a dielectric layer on the first electrode layer, annealing the dielectric layer, forming a second electrode layer on the dielectric layer, annealing the second electrode layer, patterning the capacitor stack, and annealing the capacitor stack for times greater than about 10 minutes, and advantageously greater than about 1 hour, at low temperatures (less than about 300 C) in an atmosphere containing less than about 25% oxygen and preferably less than about 10% oxygen. | 05-16-2013 |
20130122683 | BLOCKING LAYERS FOR LEAKAGE CURRENT REDUCTION IN DRAM DEVICES - A method for forming a DRAM MIM capacitor stack having low leakage current involves the use of a first electrode that serves as a template for promoting the high k phase of a subsequently deposited dielectric layer. The high k dielectric layer comprises a doped material that can be crystallized after a subsequent annealing treatment. An amorphous blocking is formed on the dielectric layer. The thickness of the blocking layer is chosen such that the blocking layer remains amorphous after a subsequent annealing treatment. A second electrode layer compatible with the blocking layer is formed on the blocking layer. | 05-16-2013 |
20130127015 | Band Gap Improvement In DRAM Capacitors - A method for forming a DRAM MIM capacitor stack having low leakage current and low EOT involves the use of an compound high k dielectric material. The dielectric material further comprises a dopant. One component of the compound high k dielectric material is present in a concentration between about 30 atomic % and about 80 atomic and more preferably between about 40 atomic % and about 60 atomic %. In some embodiments, the compound high k dielectric material comprises an alloy of TiO | 05-23-2013 |
20130140619 | High Performance Dielectric Stack for DRAM Capacitor - A method for fabricating a DRAM capacitor stack is described wherein the dielectric material is a multi-layer stack formed from a highly-doped material combined with a lightly or non-doped material. The highly-doped material remains amorphous with a crystalline content of less than 30% after an annealing step. The lightly or non-doped material becomes crystalline with a crystalline content of equal to or greater than 30% after an annealing step. The dielectric multi-layer stack maintains a high k-value while minimizing the leakage current and the EOT value. | 06-06-2013 |
20130140675 | Method for ALD Deposition Rate Enhancement - A method for fabricating a dynamic random access memory (DRAM) capacitor includes forming a first electrode layer, forming a catalytic layer on the first electrode layer, optionally annealing the catalytic layer, forming a dielectric layer on the catalytic layer, optionally annealing the dielectric layer, forming a second electrode layer on the dielectric layer, and optionally annealing the capacitor stack. Advantageously, the electrode layers are TiN, the catalytic layer is MoO | 06-06-2013 |
20130143379 | LEAKAGE REDUCTION IN DRAM MIM CAPACITORS - A method for reducing the leakage current in DRAM MIM capacitors comprises forming a multi-layer dielectric stack from an amorphous highly doped material, an amorphous high band gap material, and a lightly or non-doped material. The highly doped material will remain amorphous (<30% crystalline) after an anneal step. The high band gap material will remain amorphous (<30% crystalline) after an anneal step. The lightly or non-doped material will become crystalline (≧30% crystalline) after an anneal step. The high band gap material is formed between the amorphous highly doped material and the lightly or non-doped material and provides an intermediate barrier to conduction through the multi-layer dielectric stack. | 06-06-2013 |
20130143383 | METHOD OF FORMING AN ALD MATERIAL - In some embodiments of the present invention, methods are developed wherein a gas flow of an electron donating compound (EDC) is introduced in sequence with a precursor pulse and alters the deposition of the precursor material. In some embodiments, the EDC pulse is introduced sequentially with the precursor pulse with a purge step used to remove the non-adsorbed EDC from the process chamber before the precursor is introduced. In some embodiments, the EDC pulse is introduced using a vapor draw technique or a bubbler technique. In some embodiments, the EDC pulse is introduced in the same gas distribution manifold as the precursor pulse. In some embodiments, the EDC pulse is introduced in a separate gas distribution manifold from the precursor pulse. | 06-06-2013 |
20130143384 | HIGH PERFORMANCE DIELECTRIC STACK FOR DRAM CAPACITOR - A method for fabricating a DRAM capacitor stack is described wherein the dielectric material is a multi-layer stack formed from a highly-doped material combined with a lightly or non-doped material. The highly-doped material remains amorphous with a crystalline content of less than 30% after an annealing step. The lightly or non-doped material becomes crystalline with a crystalline content of equal to or greater than 30% after an annealing step. The dielectric multi-layer stack maintains a high k-value while minimizing the leakage current and the EOT value. | 06-06-2013 |
20130154057 | Method for Fabricating a DRAM Capacitor - A method for fabricating a dynamic random access memory (DRAM) capacitor stack is disclosed wherein the stack includes a first electrode, a dielectric layer, and a second electrode. The first electrode is formed from a conductive binary metal compound and the conductive binary metal compound is annealed in a reducing atmosphere to promote the formation of a desired crystal structure. The binary metal compound may be a metal oxide. Annealing the metal oxide (i.e. molybdenum oxide) in a reducing atmosphere may result in the formation of a first electrode material (i.e. MoO | 06-20-2013 |
20130161789 | Method for Fabricating a DRAM Capacitor - A method for fabricating a dynamic random access memory (DRAM) capacitor stack is disclosed wherein the stack includes a first electrode, a dielectric layer, and a second electrode. The first electrode is formed from a conductive binary metal. A dielectric layer is formed over the first electrode. The dielectric layer is subjected to a milliseconds anneal process that serves to crystallize the dielectric material and decrease the concentration of oxygen vacancies. | 06-27-2013 |
20130217202 | HIGH PERFORMANCE DIELECTRIC STACK FOR DRAM CAPACITOR - A method for fabricating a DRAM capacitor stack is described wherein the dielectric material is a multi-layer stack formed from a highly-doped material combined with a lightly or non-doped material. The highly-doped material remains amorphous with a crystalline content of less than 30% after an annealing step. The lightly or non-doped material becomes crystalline with a crystalline content of equal to or greater than 30% after an annealing step. The dielectric multi-layer stack maintains a high k-value while minimizing the leakage current and the EOT value. | 08-22-2013 |
20130270673 | DOPED ELECTRODES FOR DRAM APPLICATIONS - A metal oxide first electrode layer for a MIM DRAM capacitor is formed wherein the first and/or second electrode layers contain one or more dopants up to a total doping concentration that will not prevent the electrode layers from crystallizing during a subsequent anneal step. One or more of the dopants has a work function greater than about 5.0 eV. One or more of the dopants has a resistivity less than about 1000 μΩ cm. Advantageously, the electrode layers are conductive molybdenum oxide. | 10-17-2013 |
20130320495 | Integration of Non-Noble DRAM Electrode - A method for forming a capacitor stack is described. In some embodiments of the present invention, a first electrode structure is comprised of multiple materials. A first material is formed above the substrate. A portion of the first material is etched. A second material is formed above the first material. A portion of the second material is etched. Optionally, the first electrode structure receives an anneal treatment. A dielectric material is formed above the first electrode structure. Optionally, the dielectric material receives an anneal treatment. A second electrode material is formed above the dielectric material. Typically, the capacitor stack receives an anneal treatment. | 12-05-2013 |
20130328168 | Manufacturable High-k dram mim capacitor structure - A method for forming a capacitor stack is described. In some embodiments of the present invention, a first dielectric material is formed above a first electrode material. The first electrode material is rigid and has good mechanical strength and serves as a robust frame for the capacitor stack. The first dielectric material is sufficiently thin (<2nm) or highly doped so that it remains amorphous after subsequent anneal treatments. A second dielectric material is formed above the first dielectric material. The second dielectric material is sufficiently thick (>3nm) or lightly doped or non-doped so that it crystallizes after subsequent anneal treatments. A second electrode material is formed adjacent to the second dielectric material. The second electrode material has a high work function and a crystal structure that serves to promote the formation of the high k-value crystal structure of the second dielectric material. | 12-12-2013 |
20130330902 | ENHANCED NON-NOBLE ELECTRODE LAYERS FOR DRAM CAPACITOR CELL - A metal oxide first electrode material for a MIM DRAM capacitor is formed wherein the first and/or second electrode materials or structures contain layers having one or more dopants up to a total doping concentration that will not prevent the electrode materials from crystallizing during a subsequent anneal step. Advantageously, the electrode doped with one or more of the dopants has a work function greater than about 5.0 eV. Advantageously, the electrode doped with one or more of the dopants has a resistivity less than about 1000 μΩ cm. Advantageously, the electrode materials are conductive molybdenum oxide. | 12-12-2013 |
20140077337 | High Temperature ALD Process for Metal Oxide for DRAM Applications - A first electrode layer for a Metal-Insulator-Metal (MIM) DRAM capacitor is formed wherein the first electrode layer contains a conductive metal oxide formed using a high temperature, low pressure ALD process. The high temperature ALD process results in a layer with enhanced crystallinity, higher density, reduced shrinkage, and lower carbon contamination. The high temperature ALD process can be used for either or both the bottom electrode and the top electrode layers. | 03-20-2014 |
20140080284 | High Temperature ALD Process of Metal Oxide for DRAM Applications - A first electrode layer for a Metal-Insulator-Metal (MIM) DRAM capacitor is formed wherein the first electrode layer contains a conductive metal oxide formed using a high temperature, low pressure ALD process. The high temperature ALD process results in a layer with enhanced crystallinity, higher density, reduced shrinkage, and lower carbon contamination. The high temperature ALD process can be used for either or both the bottom electrode and the top electrode layers. | 03-20-2014 |
20140183695 | Methods for Reproducible Flash Layer Deposition - A method for reducing the leakage current in DRAM Metal-Insulator-Metal capacitors includes forming a flash layer between the dielectric layer and the first electrode layer. A method for reducing the leakage current in DRAM Metal-Insulator-Metal capacitors includes forming a capping layer between the dielectric layer and the second electrode layer. The flash layer and the capping layer can be formed using an atomic layer deposition (ALD) technique. The precursor materials used for forming the flash layer and the capping layer are selected such they include at least one metal-oxygen bond. Additionally, the precursor materials are selected to also include “bulky” ligands. | 07-03-2014 |
20140183696 | Methods to Improve Leakage for ZrO2 Based High K MIM Capacitor - A first electrode layer for a Metal-Insulator-Metal (MIM) DRAM capacitor is formed wherein the first electrode layer contains a conductive base layer and conductive metal oxide layer. A second electrode layer for a Metal-Insulator-Metal (MIM) DRAM capacitor is formed wherein the second electrode layer contains a conductive base layer and conductive metal oxide layer. In some embodiments, both the first electrode layer and the second electrode layer contain a conductive base layer and conductive metal oxide layer. | 07-03-2014 |
20140183697 | High Work Function, Manufacturable Top Electrode - Provided are MIM DRAM capacitors and methods of forming thereof. A MIM DRAM capacitor may include an electrode layer formed from a high work function material (e.g., greater than about 5.0 eV). This layer may be used to reduce the leakage current through the capacitor. The capacitor may also include another electrode layer having a high conductivity base portion and a conductive metal oxide portion. The conductive metal oxide portion serves to promote the growth of the high k phase of the dielectric layer. | 07-03-2014 |
20140187015 | Methods to Improve Leakage for ZrO2 Based High K MIM Capacitor - A first electrode layer for a Metal-Insulator-Metal (MIM) DRAM capacitor is formed wherein the first electrode layer contains a conductive base layer and conductive metal oxide layer. A second electrode layer for a Metal-Insulator-Metal (MIM) DRAM capacitor is formed wherein the second electrode layer contains a conductive base layer and conductive metal oxide layer. In some embodiments, both the first electrode layer and the second electrode layer contain a conductive base layer and conductive metal oxide layer. | 07-03-2014 |
20140187016 | High Work Function, Manufacturable Top Electrode - Provided are MIM DRAM capacitors and methods of forming thereof. A MIM DRAM capacitor may include an electrode layer formed from a high work function material (e.g., greater than about 5.0 eV). This layer may be used to reduce the leakage current through the capacitor. The capacitor may also include another electrode layer having a high conductivity base portion and a conductive metal oxide portion. The conductive metal oxide portion serves to promote the growth of the high k phase of the dielectric layer. | 07-03-2014 |
20140187018 | Methods for Reproducible Flash Layer Deposition - A method for reducing the leakage current in DRAM Metal-Insulator-Metal capacitors includes forming a flash layer between the dielectric layer and the first electrode layer. A method for reducing the leakage current in DRAM Metal-Insulator-Metal capacitors includes forming a capping layer between the dielectric layer and the second electrode layer. The flash layer and the capping layer can be formed using an atomic layer deposition (ALD) technique. The precursor materials used for forming the flash layer and the capping layer are selected such they include at least one metal-oxygen bond. Additionally, the precursor materials are selected to also include “bulky” ligands. | 07-03-2014 |
Patent application number | Description | Published |
20120270540 | MOBILE COMMUNICATIONS SYSTEM, WIRELESS COMMUNICATION APPARATUS, MOBILE COMMUNICATIONS APPARATUS, AND WIRELESS COMMUNICATION METHOD - In a wireless communication apparatus, a first generation unit generates first broadcast information used in processing of a first-type mobile station and a second-type mobile station. A second generation unit generates second broadcast information used in processing of the second-type mobile station. A transmission unit transmits the first broadcast information through a first broadcast channel and transmits the second broadcast information through a second broadcast channel. In a mobile communications apparatus operating as the second-type mobile station, a reception unit receives the first broadcast information transmitted through the first broadcast channel and the second broadcast information transmitted through the second broadcast channel. A control unit controls communication with the wireless communication apparatus using the first and second broadcast information. | 10-25-2012 |
20120300732 | MOBILE COMMUNICATIONS SYSTEM, BASE STATION, MOBILE STATION, AND WIRELESS COMMUNICATION METHOD - In a mobile communications system, a base station includes a generation unit and a transmission unit. The generation unit generates broadcast information indicating, among a plurality of available frequency bands for wireless communication, a frequency band to be used to transmit same data at a same timing with another base station. The transmission unit broadcasts the broadcast information. A mobile station includes a reception unit and a control unit. The reception unit receives the broadcast information broadcast by the base station. The control unit controls, based on the broadcast information, reception of same data transmitted at the same timing from the base station and the other base station. | 11-29-2012 |
20120320833 | RADIO COMMUNICATION SYSTEM, TERMINAL APPARATUS, AND RADIO COMMUNICATION METHOD IN THE RADIO COMMUNICATION SYSTEM - A radio communication system, including: a base station apparatus; and a terminal apparatus, wherein the base station apparatus and the terminal apparatus transmits to or receives from the terminal apparatus and the base station apparatus respectively a radio signal by using a plurality of frequency bands as a transmission frequency or a reception frequency, the base station apparatus includes a transmission unit which transmits a synchronization signal or a reference signal in each frequency band of the plurality of frequency bands, and the terminal apparatus includes a synchronization control unit which selects at least one synchronization signal or reference signal from the plurality of synchronization signals or reference signals transmitted from the base station apparatus and performs synchronization control based on the selected synchronization signal or reference signal. | 12-20-2012 |
20130023204 | MOBILE COMMUNICATION SYSTEM, RADIO RELAY APPARATUS, MOBILE COMMUNICATION APPARATUS, AND RADIO COMMUNICATION METHOD - A base station apparatus includes a first generating unit that generates first broadcast information for use in processing by a mobile communication apparatus that connects to the base station apparatus and in processing by another mobile communication apparatus that connects to a radio relay apparatus, and a first transmitting unit that transmits the first broadcast information. The radio relay apparatus includes a second generating unit that generates second broadcast information for use in processing by the other mobile communication apparatus, and a second transmitting unit that transmits the second broadcast information. The other mobile communication apparatus includes a receiving unit that receives the first broadcast information and the second broadcast information, and a control unit that controls radio communication performed via the radio relay apparatus, using the received first and second broadcast information. | 01-24-2013 |
20130040691 | MOBILE COMMUNICATION SYSTEM, BASE STATION, MOBILE STATION, AND RADIO COMMUNICATION METHOD - Two or more base stations among a plurality of base stations transmit data of the same content at the same timing. A base station notifies a mobile station of two or more base stations which transmit the data of the same content among the plurality of base stations. The mobile station transmits information indicating reception conditions in the mobile station of radio signals from the base stations notified of, to the base station. According to the information indicating the reception conditions, the base station instructs the mobile station to receive the data of the same content from the base stations. | 02-14-2013 |
20130195058 | APPARATUS, SYSTEM AND METHOD FOR WIRELESS COMMUNICATION - A wireless communication apparatus communicates with another wireless communication apparatus, using multiple frequency bands. A notifying unit notifies the other wireless communication apparatus of capability information on capability of the wireless communication apparatus to handle in parallel first-length guard intervals and second-length guard intervals. A transmitting unit transmits first data with the first-length guard intervals in a first frequency band and transmits second data with the second-length guard intervals in a second frequency band. A control unit schedules transmission of at least one of the first data and the second data based on the capability information. | 08-01-2013 |
20130223322 | RADIO COMMUNICATION SYSTEM, COMMUNICATION CONTROLLER, AND BASE STATION - Each of two or more base stations notifies a communication controller of information on a first frequency band that the base station uses for radio communication. Based on the information on the first frequency bands acquired from the two or more base stations, the communication controller selects a second frequency band to be used by the two or more base stations to transmit the data with common content, and notifies the two or more base stations of information on the selected second frequency band. The two or more base stations transmit the data with common content based on the information on the second frequency band acquired from the communication controller. | 08-29-2013 |
20130272249 | MOBILE COMMUNICATIONS SYSTEM, WIRELESS COMMUNICATION APPARATUS, MOBILE COMMUNICATIONS APPARATUS, AND WIRELESS COMMUNICATION METHOD - A wireless communications system includes a base station configured to use a plurality of bands; a terminal apparatus configured to communicate with the base station, using the plurality of bands simultaneously, wherein the base station includes a first controller configured to assign band identification information to each of the plurality of bands; a first communication interface configured to broadcast the band identification information of each band through a broadcast channel or an extended broadcast channel, to perform at least one of transmission and reception of user data using the plurality of bands simultaneously. The terminal apparatus includes a second communication interface configured to perform at least one of reception and transmission of the user data by using the plurality of bands simultaneously; a second controller configured to control at least one of reception and transmission of the second communication interface based on the broadcasted band identification information of each band. | 10-17-2013 |
20140016565 | COMMUNICATION SYSTEM, BASE STATION APPARATUS, TERMINAL APPARATUS, AND COMMUNICATION METHOD - A communication system includes a terminal apparatus; and primary and secondary base station apparatuses each providing one or more cells. Further, the primary base station apparatus includes a transmission unit transmitting communication conditions to the secondary base station apparatus in a coordinated communication mode where the primary and secondary base station apparatuses perform radio communications with the terminal apparatus in coordination with each other, and a radio communication unit performing radio communications with the terminal apparatus using the communication conditions in the coordinated communication mode. Further, the secondary base station apparatus includes a receiving unit receiving the communication conditions from the primary base station apparatus, a transition unit transitioning, when the communication conditions are received from the primary base station apparatus, into the coordinated communication mode, and a radio communication unit performing radio communications with the terminal apparatus using the communication conditions. | 01-16-2014 |
20140018031 | WIRELESS COMMUNICATION SYSTEM, BASE STATION DEVICE, TERMINAL DEVICE, AND WIRELESS COMMUNICATION METHOD - A wireless communication system includes one or more terminals; and a base station capable of communicating with the one or more terminals. The base station includes a specific communication control unit configured to control specific communication with a terminal belonging to a predetermined group among the one or more terminals, a non-specific communication control unit configured to control non-specific communication that is not limited to the predetermined group, and a warning message notifying unit configured to broadcast a warning message. The warning message notifying unit starts broadcasting the warning message after transmitting a notification indicating that the broadcasting of the warning message will start in the non-specific communication. The terminal includes a warning message receiving unit configured to attempt to receive the warning message broadcast from the base station, when the notification indicating that the broadcasting of the warning message will start in the non-specific communication is detected. | 01-16-2014 |
20140141736 | WIRELESS COMMUNICATION DEVICE AND POWER CONTROL METHOD - A wireless communication device includes: an amplifier configured to amplify a transmission signal to a given power level, the transmission signal being transmitted in wireless communication; and a processor coupled to the amplifier and configured to: select a communication protocol that is used for the wireless communication, from among a plurality of communication protocols including a first communication protocol and a second communication protocol of a lower communication speed than the first communication protocol, in accordance with a condition of the wireless communication, and control power source voltage of the amplifier by a control scheme determined in accordance with a communication speed of the selected communication protocol. | 05-22-2014 |
20140204871 | WIRELESS COMMUNICATION SYSTEM AND COMMUNICATION METHOD - A wireless communication system includes a primary base station; a plurality of base stations other than the primary base station; and a mobile station. Coordinated communication is executed among the primary base station, the base stations, and the mobile station. When configuring a set of one or more transmission stations and one or more reception stations of the coordinated communication, one of the reception stations of the coordinated communication transmits information about a result of measuring a known signal as a pilot from the transmission stations in response to request signals from the other base stations, respectively, to the primary base station. | 07-24-2014 |
20140364084 | TERMINAL AND MOBILE COMMUNICATION SYSTEM - A terminal configured to perform communication using a base station, includes a communication device that acquires billing information stored on an external storage device via a radio communication link with the external storage device, and a controller that performs a transmission operation to transmit the billing information acquired from the external storage device to a billing device, the billing device being connected to the base station via a network, storing original billing information for use in billing related to the communication that the terminal performs using the base station and temporarily switching from the original billing information to the received billing information when the billing information is received from the external storage device. | 12-11-2014 |
20150043485 | WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION APPARATUS - A wireless communication method for transmitting a plurality of wireless signals using a plurality of carriers from a first wireless communication apparatus to a second wireless communication apparatus, each of the plurality of carriers having each of a plurality of bandwidths, the wireless communication method including: determining a carrier group including at least two of the plurality of carrier, receiving group power control information for controlling a transmission power of the carrier group, the group power control information being generated in accordance with a reception quality of the carrier group, the reception quality of the carrier group being obtained in accordance with at least one of the plurality of wireless signals that has a carrier included in the carrier group, and transmitting the plurality of wireless signals in accordance with the group power control information. | 02-12-2015 |
20150124780 | WIRELESS COMMUNICATION SYSTEM, MOBILE STATION, BASE STATION, AND WIRELESS COMMUNICATION METHOD - A wireless communication system includes: a mobile station; a first base station that communicates with the mobile station; and a second base station that communicates with the mobile station. The mobile station includes a measuring unit, a calculating unit, and a sending unit. The measuring unit measures a location of the mobile station. The calculating unit calculates, by using location information measured by the measuring unit and location information on the first base station, a distance between the mobile station and the first base station. The sending unit sends, to the second base station based on the distance calculated by the calculating unit and a predetermined threshold, a request signal that is used to request setting of a channel between the second base station and the first base station. | 05-07-2015 |
20150133134 | WIRELESS TERMINAL, WIRELESS BASE STATION, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD - A wireless terminal including: a receiver configured to receive information for identifying at least one first cell in a wireless communication system including the at least one first cell and at least one second cell, each of the at least one first cell having a uplink carrier and a downlink carrier, each of the at least one second cell having no uplink carrier and a downlink carrier, and a processor configured to couple to one of the at least one first cell that is selected in accordance with the received information. | 05-14-2015 |
Patent application number | Description | Published |
20090213806 | WIRELESS COMMUNICATION SYSTEM AND WIRELESS TERMINAL DEVICE - Terminal capability information relating to the capability of a wireless terminal device in which at least one of a first frequency bandwidth for use in an up link and a second frequency bandwidth for use in a down link is variable is associated with a terminal category in advance. When the terminal capability information is received from the wireless terminal device, the terminal category is designated from the terminal capability information, a link is set to the wireless terminal device, and a control signal corresponding to the link setting is transmitted. Control can be simplified by setting the link along the terminal category. | 08-27-2009 |
20090318156 | Base Station Apparatus and Mobile Communication System - Disclosed is a handover method in radio communication. A base station apparatus monitors the receiving state of a terminal, detects, based upon the receiving state, whether the terminal is one in which there is a possibility that loss of a call or a decline in quality will occur or one in which loss of a call or a decline in quality has occurred, and hands over the terminal to another base station apparatus having a carrier frequency different from that of the present base station apparatus. | 12-24-2009 |
20100003995 | BASE STATION DEVICE, FREQUENCY ALLOCATION METHOD, AND MOBILE COMMUNICATION SYSTEM USING THE SAME - A base station device performs wireless communication with a terminal device. The base station device includes a setting unit to set a first frequency group in which frequencies that differ from frequencies used in an adjacent base station device are used, a second frequency group including different frequencies to the frequencies included in the first frequency group, and a third frequency group including frequencies that overlap at least partially the frequencies included in the first or second frequency group; an allocating unit to allocate a frequency included in one of the first to third frequency groups to the terminal device; and a transmission unit to transmit the allocated frequency to the terminal device. | 01-07-2010 |
20100034108 | Wireless Communication System - The terminal measures the wireless channel quality of each frequency band, and notifies the base station of the quality. The base station determines the frequency band to be used by the terminal on the basis of the notification from the terminal. Then, the terminal is grouped depending on the difference etc. in frequency band in operating the terminal, and notified which terminal group the terminal belongs. Upon receipt of the notification from the base station, the terminal sets its own available frequency band and terminal group, and measures the notified wireless channel quality of the available frequency band. The measurement result is notified to the base station. The base station perform a scheduling process for each available frequency band on the basis of the wireless channel quality of the available frequency band of the terminal, and starts communicating with the terminal. | 02-11-2010 |
20100040161 | WIRELESS TELECOMMUNICATION SYSTEM, TRANSMITTER AND RECEIVER - In a wireless telecommunication system for transmitting a plurality of streams from a base transmission station comprising a plurality of antennas to a mobile station comprising a plurality of antennas, the base transmission station respectively transmits, by way of a plurality of the antennas, each stream obtained by dividing data to be transmitted. The mobile station respectively receives each stream by utilizing the plurality of antennas. A measurement unit respectively measures a reception quality or received power from each antenna relating to a stream. A changeover unit carries out a handover for each stream according to a measurement result by the measurement unit. | 02-18-2010 |
20100046654 | COMMUNICATIONS APPARATUS AND COMMUNICATIONS SYSTEM USING MULTICARRIER TRANSMISSION MODE - A communications system for communications by a multicarrier transmission mode between a plurality of communications apparatuses, wherein an overall frequency band assigned to the communications system is divided into a plurality of frequency bands each having a constant bandwidth and a specific band. The divided bands are used to transmit used frequency band information thereby indicating the assignment of the remaining bands used between said communications apparatuses. The specific band is defined as a main band for transmitting control channel information including used frequency band information and data channel information. The main band may be added with an extension band for transmitting further data channel information. The main band and extension band can be changed in the frequency band used along with time or can be changed in the number thereof. Both the main band and the extension bands are preferably used for multiplexing by some of communications apparatuses. | 02-25-2010 |
20100329377 | RADIO COMMUNICATION SYSTEM - A radio communication system whereby one or a consecutive plurality of sub-carrier frequency intervals form sub-carrier groups each of which is assigned to a different user. The radio communication system includes a radio communication apparatus and a terminal configured to receive a control signal and a data signal from the radio communication apparatus. The terminal receives the control signal and the data signal according to a notified control signal position. | 12-30-2010 |
20110124298 | RADIO COMMUNICATION SYSTEM - A radio communication system in which a plurality of radio channels are divided in a frequency direction and mapped to a radio frame format, whereby each radio channel mapped in the radio frame format is assigned to each user or service. The radio communication system includes a radio communication apparatus and a terminal to receive a pilot signal and a data signal from the radio communication apparatus, whereby the radio communication apparatus controls a pilot signal position for each user or service and notifies information used for identifying the pilot signal position to the terminal. | 05-26-2011 |
20110200138 | COMMUNICATIONS APPARATUS AND COMMUNICATIONS SYSTEM USING MULTICARRIER TRANSMISSION MODE - A communications apparatus accommodated in a communications system for exchange of information between a communications apparatuses by a multicarrier transmission mode using a plurality of subcarriers. The communications apparatus comprises of a dedicated transmission data generator for each communications apparatus, configured to generate frequency band information indicating which frequency band is to be used for transmission of data information between each communications apparatus and a transmitter configured to transmit the dedicated frequency band information for each communications apparatus by using a specific frequency band which is set from among a plurality of frequency bands assigned to the communications system, in which the specific frequency band is set as a primary band in frequency band assigned to the communication system. | 08-18-2011 |
20110244788 | RADIO COMMUNICATIONS SYSTEM - A radio communications system includes a radio base station, an intermediate station to receive data from the radio base station and relay the received data; and another radio base station adjacent to the radio base station. The radio base station transmits data that is the same as the data to be relayed by the intermediate station, in synchronization with the relaying by the intermediate station and by using a radio resource that the intermediate station uses in the relaying of the received data. | 10-06-2011 |
20110256826 | WIRELESS COMMUNICATION SYSTEM - A wireless communication system includes a wireless base station, a mobile station configured to communicate with the wireless base station, and a relay station configured to relay the communication between the wireless base station and the mobile station. When the number of the mobile stations communicating with the wireless base station is judged to have become smaller than or equal to a given number, a power controller in the relay station executes at least one of power control to cut off the power for relaying the communication, power control to perform intermittent operation, and power control to perform power-saving operation. | 10-20-2011 |
20110261751 | RADIO COMMUNICATION SYSTEM - In a radio communication system a first radio station performs communication by the use of a first radio signal. A second radio station receives a second radio signal which is indistinguishable from the first radio signal. A third radio station is in a radio communication area of the first radio station and a radio communication area of the second radio station. A communication format conversion unit generates a third radio signal by converting a communication format of the second radio signal to a communication format which is distinguishable from the first radio signal, and communicates with the third radio station by the use of the third radio signal. | 10-27-2011 |
20120008546 | RELAY NODE, BASE STATION, AND USER EQUIPMENT FOR WIRELESS COMMUNICATIONS NETWORK - A relay node includes a processor that determines, based on uplink scheduler information, a target frequency band from plural frequency bands assigned to signals received from plural user equipments and multiplexes the signals received from the plural user equipments and a wireless communication interface that transmits the signals as a single carrier signal to a base station based on the target frequency band. | 01-12-2012 |
20120008547 | RELAY STATION, BASE STATION, RELAY METHOD AND COMMUNICATION METHOD USED IN WIRELESS COMMUNICATIONS NETWORK - A relay station includes a wireless communication interface configured to receive radio signals transmitted from plural mobile stations; and a processor configured to descramble the radio signals and extract identification information of physical layers of the mobile stations, and to convert the identification information of the physical layers to identification information of MAC layers, which are data link layers, and form a protocol data unit which includes the identification information of the MAC layers in a header and includes service data units of the radio signals. | 01-12-2012 |
20120069825 | RADIO COMMUNICATION SYSTEM, BASE STATION APPARATUS, TERMINAL APPARATUS, AND RADIO COMMUNICATION METHOD IN RADIO COMMUNICATION SYSTEM - A radio communication system including: a first and second base station apparatuses which include one or more of sells or sectors respectively; and a terminal apparatus, wherein the first and second base station apparatuses and the terminal apparatus performs radio communication, the first and second base station apparatuses includes: a process unit which performs a scrambling process to a first and second transmission data respectively by using a common scrambling code when the first and second transmission data differing each of the cells or the sectors are transmitted to the terminal apparatus; and a transmission unit which transmits the scrambling processed first and second transmission data to the terminal apparatus respectively, and the terminal apparatus includes a reception unit which receives the first and the second transmission data and performs descrambling process to the first and the second transmission data by using the common scrambling code. | 03-22-2012 |
20120087433 | COMMUNICATIONS APPARATUS AND COMMUNICATIONS SYSTEM USING MULTICARRIER TRANSMISSION MODE - A communications apparatus accommodated in a communications system for exchange of information between a communications apparatuses by a multicarrier transmission mode using a plurality of subcarriers. The communications apparatus includes a dedicated transmission data generator for each communications apparatus, configured to generate frequency band information indicating which frequency band is to be used for transmission of data information between each communications apparatus; and a transmitter configured to transmit the dedicated frequency band information with dedicated control channel for each communications apparatus by using a specific frequency band which is set from among a plurality of frequency bands assigned to the communications system, in which the specific frequency band is set as a primary band in a frequency band assigned to the communication system. | 04-12-2012 |
20120094682 | RADIO COMMUNICATION SYSTEM, BASE STATION APPARATUS, TERMINAL APPARATUS, RELAY STATION APPARATUS AND RADIO COMMUNICATION METHOD FOR RADIO COMMUNICATION SYSTEM - A radio communication system including: a base station; a terminal; and a relay station, wherein the base station and the terminal perform radio communication via the relay station, the base station includes: a change unit which changes at least any of a radio resource allocation method for the relay station and the terminal, the radio resource allocation method and a scheduling method, or the radio resource allocation method, the scheduling method and a relay method in the relay station; and a transmission unit which transmits a change notice for notifying the relay station of the change by the change unit, the relay station includes a reception unit which receives the change notice, and the base station, the relay station, and the terminal perform radio communication using at least the radio resources allocating or allocated by the radio resource allocation method after the change. | 04-19-2012 |
20120099730 | RADIO COMMUNICATION SYSTEM, BASE STATION APPARATUS, TERMINAL APPARATUS, AND RADIO COMMUNICATION METHOD IN RADIO COMMUNICATION SYSTEM - A radio communication system, including: a first and second base station apparatuses which includes one or plurality of cells or sectors, respectively; and a terminal apparatus, wherein each of the first and second base station apparatuses includes: a processing unit which executes scrambling processing on a first and second transmission data that are different from each other for each cell or sector by using a first and second scrambling codes having a predetermined phase difference respectively, when the first and second transmission data are to be transmitted to the terminal apparatus respectively; and a transmission unit which transmits the first and second transmission data processed by the scrambling processing to the terminal apparatus respectively, and the terminal apparatus includes a reception unit which executes descrambling processing on the first and second transmission data by using the first and second scrambling codes respectively. | 04-26-2012 |
20120120896 | WIRELESS COMMUNICATION SYSTEM AND WIRELESS TERMINAL DEVICE - A wireless communication system, comprising
| 05-17-2012 |
20120120897 | WIRELESS COMMUNICATION SYSTEM AND WIRELESS TERMINAL DEVICE - A wireless communication system, that includes, a category designation unit capable of designating a terminal category using a difference between a transmitting frequency and a receiving frequency available between the system and a wireless terminal device. | 05-17-2012 |
20120122409 | WIRELESS COMMUNICATION SYSTEM AND WIRELESS TERMINAL DEVICE - A wireless communication system corresponding to a wireless terminal device in which at least one of a first frequency bandwidth for use in an up link and a second frequency bandwidth for use in a down link is variable, including a capability information reception unit capable of receiving and extracting terminal capability information transmitted from the wireless terminal device and related to capability of the wireless terminal device; a category designation unit capable of designating a terminal category to which the wireless terminal device belongs, based on the terminal capability information received and extracted by the capability information reception unit; and a link setting unit capable of setting a link to the wireless terminal device and transmitting a control signal depending on the link setting to the wireless terminal device, based on the terminal category designated by the category designation unit. | 05-17-2012 |
20120184316 | RADIO COMMUNICATION SYSTEM, BASE STATION APPARATUS, TERMINAL APPARATUS, AND RADIO COMMUNICATION METHOD IN RADIO COMMUNICATION SYSTEM - A radio communication system, includes a base station apparatus; and a terminal apparatus, wherein radio communication is performed between the base station apparatus and terminal apparatus, the terminal apparatus includes: a required time notification signal generation unit which generates a required time notification signal indicating a required time for change of a transmission bandwidth or a reception bandwidth to the base station apparatus; and a transmission unit which transmits the required time notification signal, and the base station apparatus includes a reception unit which receives the required time notification signal. | 07-19-2012 |
20120214431 | TRANSMITTER AND POWER SUPPLY CONTROL MODULE - A transmitter includes: a first envelope extractor that extracts a first envelope signal on the basis of a first modulated signal of a first frequency modulated with transmission data; a second envelope extractor that extracts a second envelope signal on the basis of a second modulated signal of a second frequency modulated with the transmission data, the second frequency being higher than the first frequency; an amplifier that amplifies one of the first modulated signal and the second modulated signal; a power adjuster that outputs a voltage of power supplied to the amplifier; and a controller that makes the amplifier amplify one of the first modulated signal and the second modulated signal and makes the power adjuster output the voltage of the supplied power on the basis of corresponding one of the first envelope signal and the second envelope signal. | 08-23-2012 |
20120275434 | Base Station Apparatus and Mobile Communication System - Disclosed is a handover method in radio communication. A base station apparatus monitors the receiving state of a terminal, detects, based upon the receiving state, whether the terminal is one in which there is a possibility that loss of a call or a decline in quality will occur or one in which loss of a call or a decline in quality has occurred, and hands over the terminal to another base station apparatus having a carrier frequency different from that of the present base station apparatus. | 11-01-2012 |
20120281669 | COMMUNICATIONS APPARATUS AND COMMUNICATIONS SYSTEM USING MULTICARRIER TRANSMISSION MODE - A communications system for exchange of information between a base station and a terminal by a multicarrier transmission mode using a plurality of subcarriers. The communication system includes a base station, a transmission data generator configured to generate frequency band information indicating which frequency band is to be used for transmission of data between said communication apparatuses; and a transmitter configured to transmit the frequency band information, using a specific frequency band, set from among a plurality of frequency bands assigned to the communications system, and to transmit data by using at least one frequency band set from among said plurality of frequency bands, and at the time of establishing the wireless channel, the frequency band usable by the communications apparatus is restricted, and said specific frequency band and said at least one frequency band set, other than the specific frequency band, are assigned within that restricted frequency band. | 11-08-2012 |
20120287808 | COMMUNICATIONS APPARATUS AND COMMUNICATIONS SYSTEM USING MULTICARRIER TRANSMISSION MODE - A communications system for exchange of information between communications apparatuses by a multicarrier transmission mode using a plurality of subcarriers, the communication system includes a transmission data generator configured to generate frequency band information indicating which frequency band is to be used for transmission of data information between said communication apparatuses and a transmitter configured to transmit the frequency band information by using a specific frequency band which is set from among a plurality of frequency band assigned to the communications system, and to transmit data information by using at least one frequency band set from among said plurality of frequency bands; and a receiver configured to receive the frequency band information by using the specific frequency band, wherein said specific frequency band also transmits data information and said specific frequency band is made variable. | 11-15-2012 |
20120287890 | COMMUNICATIONS APPARATUS AND COMMUNICATIONS SYSTEM USING MULTICARRIER TRANSMISSION MODE - A communications system for exchange of information between communications apparatuses by a multicarrier transmission mode using a plurality of subcarriers, the communication system comprising: a transmission data generator configured to generate frequency band information indicating which frequency band is to be used for transmission of data information between said communication apparatuses and a transmitter configured to transmit the frequency band information by using a specific frequency band which is set from among a plurality of frequency band assigned to the communications system, and to transmit data information by using at least one frequency band set from among said plurality of frequency bands and a receiver configured to receive the frequency band information by using the specific frequency band. Furthermore, at least one frequency band set from among said plurality of frequency bands, other than the specific frequency band, is made variable. | 11-15-2012 |
20120287891 | COMMUNICATIONS APPARATUS AND COMMUNICATIONS SYSTEM USING MULTICARRIER TRANSMISSION MODE - A communications system for exchange of information between communications apparatuses by a multicarrier transmission mode using a plurality of subcarriers, includes a transmission data generator configured to generate frequency band information indicating which frequency band is to be used for transmission of data information between said communication apparatuses; a transmitter configured to transmit the frequency band information by using a specific frequency band which is set from among a plurality of frequency band assigned to the communications system, and to transmit data information by using at least one frequency band set from among said plurality of frequency bands; a receiver configured to receive the frequency band information by using the specific frequency band, whereby the specific frequency band among said plurality of frequency bands and at least one frequency band set among the plurality of frequency bands, other than the specific frequency band, are made variable to avoid overlap. | 11-15-2012 |
20120294265 | COMMUNICATIONS APPARATUS AND COMMUNICATIONS SYSTEM USING MULTICARRIER TRANSMISSION MODE - A communications system for exchange of information between communications apparatuses by a multicarrier transmission mode using a plurality of subcarriers, the communication system includes a transmission data generator configured to generate frequency band information indicating which frequency band is to be used for transmission of data information between said communication apparatuses and a transmitter configured to transmit the frequency band information by using a specific frequency band which is set from among a plurality of frequency band assigned to the communications system, and to transmit data information by using at least one frequency band set from among said plurality of frequency bands and a receiver configured to receive the frequency band information by using the specific frequency band, whereby one or more of said frequency band is assigned consecutive with said specific frequency band along a frequency axis. | 11-22-2012 |
20120300730 | COMMUNICATIONS APPARATUS AND COMMUNICATIONS SYSTEM USING MULTICARRIER TRANSMISSION MODE - A communications system for exchange of information between communications apparatuses by a multicarrier transmission mode using a plurality of subcarriers, the communication system includes a transmission data generator configured to generate frequency band information indicating which frequency band is to be used for transmission of data information between said communication apparatuses and a transmitter configured to transmit the frequency band information by using a specific frequency band which is set from among a plurality of frequency band assigned to the communications system, and to transmit data information by using at least one frequency band set from among said plurality of frequency bands; and a receiver configured to receive the frequency band information by using the specific frequency band, wherein bandwidths of said plurality of frequency bands are made a predetermined value, and also numbers of subcarriers in each of the bands are made a predetermined value. | 11-29-2012 |
20120300731 | COMMUNICATIONS APPARATUS AND COMMUNICATIONS SYSTEM USING MULTICARRIER TRANSMISSION MODE - A communications system for exchange of information between communications apparatuses by a multicarrier transmission mode using a plurality of subcarriers, that includes a transmission data generator configured to generate frequency band information indicating which frequency band is to be used for transmission of data between said communication apparatuses; a transmitter configured to transmit the frequency band information, using a specific frequency band, set from among a plurality of frequency band assigned to the communications system, to transmit data using at least one frequency band set from among said plurality of frequency bands; a receiver configured to receive the frequency band information by using the specific frequency band, wherein one or more of said frequency band is assigned not consecutive with said specific frequency band along a frequency axis, and at least one not used subcarrier is inserted between the specific frequency and the frequency band or between said frequency bands. | 11-29-2012 |
20120314657 | COMMUNICATIONS APPARATUS AND COMMUNICATIONS SYSTEM USING MULTICARRIER TRANSMISSION MODE - A communications system that includes a transmission data generator configured to generate frequency band information indicating which frequency band is to be used for transmission of data information between said communication apparatuses; a transmitter configured to transmit the frequency band information by using a specific frequency band, set from among a plurality of frequency band assigned to the communications system, to transmit data information using at least one frequency band set from among said plurality of frequency bands; a receiver configured to receive the frequency band information, using the specific frequency band. The frequency band set as said at least one frequency band set from among said plurality of frequency bands, other than the specific frequency band, is made variable, at the time of establishing the wireless channel, the frequency band usable by the communications apparatus is restricted. | 12-13-2012 |
20130022002 | RADIO COMMUNICATION SYSTEM - A radio communication system wherein one or a consecutive plurality of sub-carriers at certain frequency intervals form sub-carrier groups each of which is assigned to a different user, the radio communication system including a radio communication apparatus; and a terminal configured to receive a notification for identifying control signal positions from the radio communication apparatus, wherein the terminal receives a control signal and a data signal according to the control signal positions identified by the notification. | 01-24-2013 |
20130343331 | RADIO COMMUNICATION SYSTEM, BASE STATION APPARATUS, TERMINAL APPARATUS, AND RADIO COMMUNICATION METHOD IN RADIO COMMUNICATION SYSTEM - A radio communication system including: a first and second base station apparatuses which include one or more of sells or sectors respectively; and a terminal apparatus, wherein the first and second base station apparatuses and the terminal apparatus performs radio communication, the first and second base station apparatuses includes: a process unit which performs a scrambling process to a first and second transmission data respectively by using a common scrambling code when the first and second transmission data differing each of the cells or the sectors are transmitted to the terminal apparatus; and a transmission unit which transmits the scrambling processed first and second transmission data to the terminal apparatus respectively, and the terminal apparatus includes a reception unit which receives the first and the second transmission data and performs descrambling process to the first and the second transmission data by using the common scrambling code. | 12-26-2013 |
20140153525 | COMMUNICATIONS APPARATUS AND COMMUNICATIONS SYSTEM USING MULTICARRIER TRANSMISSION MODE - A base station in a communications system for exchange of information, includes, a transmission data generator configured to generate frequency band information indicating which frequency band is to be used for transmission of data information with a mobile station; a transmitter configured to transmit the frequency band information, using a specific frequency band which is set from among a plurality of frequency band assigned to the communications system, and to transmit data information by using at least one frequency band set from among said plurality of frequency bands; wherein at least one frequency band set from among said plurality of frequency bands, other than the specific frequency band, is made variable, wherein at the time of establishing the wireless channel, the frequency band usable by the mobile station is restricted, at least one frequency band, other than the specific frequency band, are dynamically assigned within that restricted frequency band. | 06-05-2014 |
20140314045 | RADIO COMMUNICATIONS SYSTEM - A scheduling process handles a plurality of communication services in a collective manner, thus making a radio communications system more operable. A pilot signal sender sends pilot signals with carrier frequencies each corresponding to an N (N≧1) different communication services. A scheduler collects N×n instances of propagation environment data from n (n≧1) terminal devices and selects terminal devices and communication services therefor by assigning terminal devices having a better propagation environment to the plurality of different communication services in a collective manner. The pilot signals are used by a propagation environment data sender to measure and report a propagation environment of each carrier frequency. A communication function configurer automatically sets up a communication function to adapt to the communication service that the base station has assigned. | 10-23-2014 |
20150188721 | RADIO COMMUNICATION SYSTEM - In a radio communication system a first radio station performs communication by the use of a first radio signal. A second radio station receives a second radio signal which is indistinguishable from the first radio signal. A third radio station is in a radio communication area of the first radio station and a radio communication area of the second radio station. A communication format conversion unit generates a third radio signal by converting a communication format of the second radio signal to a communication format which is distinguishable from the first radio signal, and communicates with the third radio station by the use of the third radio signal. | 07-02-2015 |
20150189623 | RADIO COMMUNICATION SYSTEM - In a radio communication system a first radio station performs communication by the use of a first radio signal. A second radio station receives a second radio signal which is indistinguishable from the first radio signal. A third radio station is in a radio communication area of the first radio station and a radio communication area of the second radio station. A communication format conversion unit generates a third radio signal by converting a communication format of the second radio signal to a communication format which is distinguishable from the first radio signal, and communicates with the third radio station by the use of the third radio signal. | 07-02-2015 |
20150195031 | RADIO COMMUNICATION SYSTEM - In a radio communication system a first radio station performs communication by the use of a first radio signal. A second radio station receives a second radio signal which is indistinguishable from the first radio signal. A third radio station is in a radio communication area of the first radio station and a radio communication area of the second radio station. A communication format conversion unit generates a third radio signal by converting a communication format of the second radio signal to a communication format which is distinguishable from the first radio signal, and communicates with the third radio station by the use of the third radio signal. | 07-09-2015 |
20150201416 | COMMUNICATIONS APPARATUS AND COMMUNICATIONS SYSTEM USING MULTICARRIER TRANSMISSION MODE - A base station accommodated in a communications system for communicating with a mobile station, the base station includes: a transmitter configured to generate frequency band information indicating which frequency band of used frequency bands available in the communication system is to be used for transmission of data information with a mobile station, to transmit the frequency band information by using a specific frequency band assigned from the used frequency bands, and to transmit data information by using at least one of the frequency bands; wherein the frequency bands except for the specific frequency band, are made variable. | 07-16-2015 |