Beijing University of Posts and Telecommunications Patent applications |
Patent application number | Title | Published |
20150334773 | Wireless Communication Network System Based On Centralized Control And Content Delivery - The present disclosure provides a wireless communication network system based on centralized control and content delivery, comprising a centralized controller, a core network data forwarding unit, a core network data cache unit, and at least one distributed base station. The centralized control and content delivery control can be performed by the wireless communication network system provided by the present disclosure. In this manner, the user experience can be guaranteed, the centralized control can be realized, and the load of the base station equipment can be reduced to the largest extent. At the same time, the data interaction between base station and internet can be reduced, and thus the occupancy of bandwidth resources can be reduced accordingly. | 11-19-2015 |
20150312797 | Method And Device For Controlling The Fusion Of A Heterogeneous System - A device for controlling the fusion of a heterogeneous system, which receives a first data stream from a MAC layer of a WLAN through a LLC sub-layer and a second data stream from a MAC layer of a cellular network through a PDCP and a RLC sub-layer, and for fusing the first data stream and the second data stream into one data stream and transmitting the fused one data stream to a network layer. The device demultiplexes the data stream from the network layer into a third data stream corresponding to the MAC layer of the WLAN and a fourth data stream corresponding to the MAC layer of the cellular network, and transmits the third data stream to the MAC layer of the WLAN through the LLC and the fourth data stream to the MAC layer of the cellular network through the PDCP and the RLC sub-layer. | 10-29-2015 |
20150295654 | SYSTEM ARCHITECTURE FOR GLOBAL OPTIMIZATION OF FLEXIBLE GRID OPTICAL NETWORK AND GLOBAL OPTIMIZATION METHOD THEREFOR - The present invention discloses a system architecture for global optimization of a flexible grid optical network and a global optimization method therefor. The system architecture for global optimization of the flexible grid optical network provided in the present invention comprises a requesting unit for global optimization and an execution unit for global optimization, wherein the requesting unit for global optimization generates a request message for global optimization, and sends the request message for global optimization to the execution unit for global optimization; and the execution unit for global optimization parses the request message for global optimization, performs global optimization based on a constraint condition for global optimization, a computation algorithm for global optimization and a network topology and resource information of the flexible grid optical network, and returns a global optimization result to the requesting unit for global optimization. | 10-15-2015 |
20140357296 | LOCATING METHOD AND LOCATING SYSTEM - The present invention, pertaining to the field of communications technologies, discloses a locating method and a locating system. The method includes: receiving a locating request and a locating feature parameter from a terminal, where the locating feature parameter is acquired by demodulating a locating spread spectrum signal inserted in a timeslot header or a transmission frame header of a mobile broadcast signal after the terminal receives the mobile broadcast signal; and locating the terminal by using a grid-based feature parameter matching algorithm according to the locating feature parameter. According to the present invention, a locating feature parameter that is acquired after a terminal demodulates a received mobile broadcast signal is received from the terminal; and the terminal is located by using a grid-based feature parameter matching algorithm according to the locating feature parameter. This, on the premise of not affecting normal receiving and demodulation of mobile broadcast signals, not only achieves an effect of real-time and high-precision location and implements wide-area high-precision location and navigation of mass of terminals, but also implements integration of a broadcast system and a mobile communication system. | 12-04-2014 |
20140205033 | Method for Uplink Multi-User Cooperation Communication - The present invention discloses a method for uplink multi-user cooperation communication, which is applied in a system at least including a first source node, a second source node and a target node, wherein there is a direct transmission link between either the first or the second source node and the target node. The method includes the following steps: when transmitting a signal to the target node, the first source node also transmits the signal to the second source node, the second source node changing to a relay node of the first source node and forwarding the signal to the target node; the target node obtains its reception Signal Noise Ratio (SNR) by using a maximal ratio combining mode according to the signal directly transmitted from the first source node and the signal forwarded from the second source node, sets a precoding policy according to the reception SNR, and selects, based on real-time channel conditions, the optimal precoding as a precoding vector which is used when the first source node transmits a signal to the target node. The present invention can effectively enhance the capacity and throughput of the system and reduce the block error rate. | 07-24-2014 |
20140155079 | METHOD FOR SPECTRUM ALLOCATION BASED ON INTERFERENCE SUPPRESSION AND USER DIFFERENCE BANDWIDTH REQUIREMENTS - The present invention relates to the technical field of wireless communication and of mobile communication, and more particularly to a method for spectrum resource allocation and interference avoidance of femtocell in a heterogeneous environment consisting of macro cell and femtocell, and specifically to a spectrum allocation method based on interference suppression and user difference bandwidth requirements. According to the spectrum allocation method based on interference suppression and user difference bandwidth requirements of the present invention, spectrum resource can be allocated reasonably according to the priority level of bandwidth requirements in combination with graph coloring algorithm and chromaticity preference algorithm. In this manner, in-layer interference among femtocells and cross-layer interference among femtocells and macro cells can be effectively suppressed, the difference bandwidth requirements of femtocell users can be satisfied, and the efficiency of frequency utilization and the whole throughput of system can be also optimized to the maximum extent. | 06-05-2014 |
20140140510 | METHOD FOR GENERATING CONSISTENT CRYPTOGRAPHIC KEY BASED ON WIRELESS CHANNEL FEATURES - The present invention discloses a method for generating a consistent cryptographic key based on wireless channel features. First of all, channel estimated values ĥ | 05-22-2014 |
20130343432 | METHOD AND APPARATUS FOR GENERATING BROADCAST POSITIONING SIGNAL, AND POSITIONING METHOD - The present invention, pertaining to the field of mobile broadcast television technologies, discloses a method and apparatus for generating a broadcast positioning signal, and a positioning method. According to the present invention, a broadcast positioning signal is generated by inserting a spread spectrum signal and a first spread spectrum signal in an orthogonal frequency-division multiplexing (OFDM) signal, and a receiver is positioned according to broadcast positioning signals from at least three different senders. | 12-26-2013 |
20130329650 | METHOD FOR ALLOCATING DOWNLINK TRANSMISSION POWER OF COORDINATED TRANSMISSION DEVICES IN COORDINATED MULTI-POINT TRANSMISSION SYSTEM - A method for allocating downlink transmission power of coordinated transmission devices in coordinated multi-point transmission system includes the coordinated transmission devices receiving feedback of channel state information of sub-channels occupied by a terminal from the terminal. The channel state information includes channel phase information and channel amplitude information. Each of the coordinated transmission devices adjusts phases of their sending signals over its sub-channels respectively so as to make phase difference of the sending signals, which are received by the terminal from the coordinated transmission devices via a same sub-channel, to be minimal. Each of the coordinated transmission devices determines its power allocation proportions for the sub-channels on the basis of feedback of channel amplitude information from the terminal and the adjusted phases of the sending signals. By adapting coordinate Iterative Water filling Power Allocation Algorithm with low complexity, the capacity of the system is increased. | 12-12-2013 |
20130324158 | MOBILE BROADCAST-BASED LOCATION METHOD AND APPARATUS - The present invention, pertaining to the field of wireless communications, discloses a mobile broadcast-based method and apparatus that includes: receiving a mobile broadcast signal; demodulating a location spreading signal inserted in the header of a time slot or a transmission frame of the mobile broadcast signal to acquire navigation message information, and measuring and acquiring location characteristic parameters, wherein the navigation message information includes the identifier of a mobile broadcast station, and the location characteristic parameters correspond to the identifier; and acquiring location data according to the location characteristic parameters and the navigation message information. According to the method and apparatus, a location spreading signal is carried in the header of a time slot or in the header of a transmission frame of the mobile broadcast signal, navigation message information is acquired by demodulating the location spreading signal, and location characteristic parameters are acquired by measurement to acquire location data. | 12-05-2013 |
20130308571 | METHOD FOR FREQUENCY REUSE IN CELLULAR NETWORK - The present invention relates to the technical field of wireless communication, and discloses a method for frequency reuse based on cellular network. The method comprises the following steps: dividing the whole cellular network into a plurality of different cell clusters, wherein each cell cluster comprises three cells, every two of them being adjacent to each other; for each cell in a cell cluster, dividing the cell into a central area and an edge area according to the coverage of the cell; dividing the whole available frequency band of the network according to the user distribution and service distribution in the cell cluster; allocating divided frequency bands to the central area and the edge area in the cell cluster respectively according to preset rule; and applying the method for frequency reuse to other cell clusters, thus achieving the frequency reuse of the whole network. With the method, the average spectrum frequency efficiency of the cellular network can be improved, and interference among cells can be effectively suppressed. | 11-21-2013 |
20130308570 | METHOD FOR JOINT OPTIMIZATION OF SCHEDULE AND RESOURCE ALLOCATION BASED ON THE GENETIC ALGORITHM - The invention relates to the technical field of wireless communication, and provides a method for joint optimization of schedule and resource allocation based on a genetic algorithm, which is applied in a CoMP communication system. The method includes steps of: S1, encoding chromosome; S2, initializing setting; S3, computing fitness value; S4, determining whether the optimal solution is better than an elite: if yes, updating the elite and executing S5, and if no, turning to S5; S5, determining whether a predetermined generation of population has been generated or not, if no, executing S6, otherwise, turning to S8; S6, participating reproduction process to generate two offspring chromosome individuals; S7, determining whether a predetermined number of offspring chromosome individuals have been generated, if yes, turning to S3 to compute again; otherwise keeping on reproduction; S8, performing schedule and resource allocation according to a solution corresponding to the elite. Under the condition of satisfying schedule limitation and power limitation, the method can, by uniting schedule and resource allocation, efficiently optimize system performance with less computing complexity. | 11-21-2013 |
20130251058 | MULTI-ANTENNA CODEBOOK SELECTION MODULATION METHOD FOR SOLVING WEAK SCATTERING - A multi-antenna codebook selection modulation method for solving weak scattering is provided by the present invention. The method obtains higher diversity gain from a combination of multi-antenna codebook pre-coding and a rotation modulation solution by designing a new codebook selection rule. The present invention employs a design solution of designing a higher-order modulation diversity and space interleaver to obtain the higher diversity gain. In addition, the number of transmission antennas and the number of rotation modulation dimension can be set arbitrarily. However, the present invention takes the number Nt of transmission antennas to be equal to the number D of rotation modulation dimension in order to obtain higher diversity gain. In this way, the method evenly disperses signals of each dimension after D-dimensional rotation to each antenna through space interleaving technique, so that the signals of each dimension suffer different fading, thus enabling space diversity gain. With the present invention, the data of a transmitting end are pre-coded by using a channel value estimated for an ideal channel. | 09-26-2013 |
20130223272 | METHOD FOR ESTABLISHING COMP COOPERATING SET IN COORDINATED MULTI-POINT COMMUNICATION - Disclosed is a method for establishing a CoMP cooperating set in coordinated multi-point communication, the method comprising the steps of: triggering and starting a coordinated multi-point communication process; according to channel state information of all cells in a measurement cell set measured by a UE, determining a candidate CoMP cooperating set; sending a CoMP cooperating set establishment request to eNodeBs of the cooperating cells in the determined candidate CoMP cooperating set; the eNodeBs being of the cooperating cell and receiving the CoMP cooperating set establishment request responding to the CoMP cooperating set establishment request to the eNodeB of the serving cell of the UE, and sending a CoMP cooperating set establishment response to the eNodeB of the serving cell of the UE; the eNodeB of the serving cell of the UE determining a CoMP cooperating set of the UE according to information of the CoMP cooperating set establishment response; and according to a coordinated multi-point communication mode, sharing data information and service bearer information of the UE of the CoMP cooperating set. The present invention guarantees coordinated multi-point joint transmission/reception, decreases the overhead and complexity of the communication system and furthermore reduces the time delay in the information exchange. | 08-29-2013 |
20120309406 | METHOD FOR INTERFERENCE SUPPRESSION - An interference suppression method is provided. A method includes the following steps: determining, by a Femtocell, a set of Femtocells which generate interference with said Femtocell based on information measured by and feedbacked from subscribers which are served by said Femtocell, and delivering the cell IDs of all Femtocells in said set to a Femtocell gateway; establishing, by the Femtocell gateway, a relationship graph on interference among Femtocells according to information delivered from the Femtocells, and clustering the Femtocells based on said relationship graph; determining the range influenced by each Femtocell cluster; allocating resources to the Femtocells in each isolated cluster or in the range influenced by each cluster. It may ensure liable communications of Femtocell subscribers as possible, and/or may maximize spectrum efficiency and system capacity of the Femtocell layer as possible. | 12-06-2012 |
20110128889 | Method for Selecting and Configuring Network Supernodes - A method for selecting and configuring network supernodes including the following operational steps: in a first set period T | 06-02-2011 |