Patent application number | Description | Published |
20080267269 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNALS - Disclosed herein is a method which may include determining whether to include a sounding reference signal or a demodulation reference signal within a variable block of a subframe, and transmitting the subframe from a wireless node to an infrastructure node. The subframe may include a plurality of blocks, each block including a plurality of subcarriers. | 10-30-2008 |
20090046649 | Mapping of uplink ACK in TDD with asymmetric frame structure - For each of at least two ratios of downlink subframes exceeding uplink subframes in a frame is stored a pre-determined grouping of a plurality of downlink subframes that map to one uplink subframe. A frame is scheduled corresponding to one of the ratios. Scheduling grants are transmitted to user equipments UEs in at least some of the scheduled downlink subframes, wherein the number of scheduled downlink subframes is greater than the number of scheduled uplink subframes in the frame. The UEs receive their grant, map the downlink subframe in which the scheduling grant was received to an uplink subframe using the stored predetermined grouping for the ratio that corresponds to the frame in which the scheduling grant was received, and send their ACK/NACK for the grant in the mapped subframe. The network receives multiple ACKs/NACKs in a single uplink subframe and maps them, to the downlink subframes of the group. | 02-19-2009 |
20090046674 | METHOD AND APPARATUS FOR PROVIDING CHANNEL FEEDBACK INFORMATION - An approach is provided for transmitting channel feedback information. Bandwidth is partitioned into one or more resource groups corresponding to one or more resource units. One or more of the partitions is designated for transmission of a plurality of uplink pilots that specify channel information for the corresponding resource units. | 02-19-2009 |
20100110917 | Method, Apparatus and Computer Program Product For Adaptive Reference Symbol Placement - A method, apparatus and computer program product are provided that determine the length of an idle period, such as the idle period preceding a DL-to-UL switch point, and then insert a symbol including reference signal(s) (RS) at a position within a downlink slot that varies based upon the length of the idle period. A method, apparatus and computer program product are also provided according to another aspect that determine the length of an idle period, receive a plurality of symbols within a downlink slot and then recognize a symbol including RS at a position within the downlink slot that varies based upon the length of the idle period. Accordingly, the method, apparatus and computer program product permit the position of the symbol including RS within a downlink slot to be varied while still providing the reference signals that are required in order to permit accurate recovery of the data. | 05-06-2010 |
20100150081 | PHYSICAL UPLING CONTROL CHANNEL COMPRESSION SUPPORTING ACK/NACK BUNDLING - In one exemplary embodiment, a method includes: dividing a plurality of control channel elements in at least one downlink subframe of a bundling window into a plurality of portions having a first portion and a second portion, where the first portion includes at least one control channel element that is mapped to resources and the second portion includes at least one control channel element that is not mapped to resources, where the bundling window has a plurality of downlink subframes; and sending a last downlink grant in a downlink subframe of the bundling window using at least one control channel element that is mapped to resources. | 06-17-2010 |
20100214972 | METHODS AND APPARATUSES FOR TRANSMITTING DOWNLINK CONTROL SIGNALING ON WIRELESS RELAY LINK - In accordance with an example embodiment of the present invention, a method comprises allocating a control channel resource in a wireless relay transmission frame on a wireless relay link; generating a control signaling based on at least one of a resource allocation scheme, a status of the wireless relay link and a traffic condition of the wireless relay link; mapping the control signaling to the allocated control channel resource via at least one of a time-first mapping, a frequency-first mapping, and a multiplexing mapping; and transmitting the control signaling in the allocated control channel resource on the wireless relay link to at least one associated relay node. | 08-26-2010 |
20110010598 | User Specific Load Balancing - In accordance with exemplary embodiments of the invention there is a method and apparatus to detect with a hybrid automatic repeat request function a collision between an uplink packet re-transmission and a new uplink packet transmission within a hybrid automatic repeat request process, and in response, to dynamically allocating resources for transmitting the new uplink packet transmission in a different hybrid automatic repeat request process that does not collide with the uplink packet re-transmission. In accordance with other exemplary embodiments of the invention, there is a method and apparatus to transmit a packet re-transmission in a hybrid automatic repeat request process using a semi-persistently scheduled uplink resource, and responsive to receiving a dynamic allocation of a different hybrid automatic repeat request process, to transmit a new packet using the dynamically allocated different hybrid automatic repeat request process. | 01-13-2011 |
20120093061 | ADAPTIVE TRANSMISSION MODES FOR TRANSPARENT RELAY - There is transmitted to a user equipment UE in a first subframe of a radio frame a downlink shared channel DSCH according to a first relay-transmission mode (e.g., mode A or A′ in the examples); then switch to a second relay-transmission mode (e.g., mode C or C′ in the examples) within the radio frame based on a channel quality of the DSCH. After switching, then transmit to the UE, in a subsequent subframe of the radio frame, the DSCH according to the second relay-transmission mode. In this embodiment the HARQ process is synchronous and non-adaptive for mode C: the eNB re-transmits packets to the UE in a predetermined fashion to be concurrent with transmission of those same packets from the relay node, as scheduled by the eNB. In this embodiment the eNB receives the UE's NACK for the data that is to be retransmitted via relay through the relay node. | 04-19-2012 |
20120113913 | Method of Scheduling Data - A method of transmitting uplink control signals/status bits from a user equipment, said user equipment having multiple transmit antennae, and said control signals correspond to a plurality of previous downlink transmissions, wherein said control signals are transmitted over a plurality of PUCCH resources and over said multiple antennae, and transmitted during a single uplink sub-frame. Use of multiple PUCCH resources and multiple antennae allow greater spatial diversity. | 05-10-2012 |
20120120926 | Multiple Uplink Control Channel Transmission with Reduced Cubic Metric - It is determined that there are X uplink control channel resources available for uplink signaling. Each of those X uplink control channel resources are sub-channelized into a plurality of sub-channels that each defines a unique time instant or point in time. For each of Y units of control information there is selected a unique combination of one of the sub-channels and a modulation (X and Y are each integers greater than one). The Y units of control information are sent on the X uplink control channel resources according to the respectively selected combinations. By example the uplink resources may be an ACK/NAK/DTX bit on a of one of the sub-channels and a modulation PUCCH. In one example the sub-channels are individual slots of a PUCCH. In another example the sub-channels are the reference-signal part and the data part of a single PUCCH slot. | 05-17-2012 |
20120188962 | Apparatus and Method for Non-Codebook Based Precoding - An apparatus and a method are provided. The provided solution includes a controller configured to determine a transmission mode for user equipment, the transmission mode including non-codebook precoding with fixed precoding granularity; and to control a transceiver to transmit information on the selected transmission mode to the user equipment. | 07-26-2012 |
20130064209 | Support of UL ACK/NACK Feedback for Carrier Aggregation During Timing Uncertainty Component Carrier (Re-) Configuration/Activation/De-activation Period - An apparatus and a method is described, by which a component carrier configuration, re-configuration, activation or deactivation is performed. In particular, a signaling format used for acknowledgment/negative acknowledgement messages on an uplink control channel is detected, and a codebook size of the acknowledgment/negative acknowledgement messages is decided based on the detected signaling format. | 03-14-2013 |
20130157656 | Device-To-Device Discovery and Operation - The specification and drawings present a method, apparatus and software related product (e.g., a computer readable memory) for improving device discovery and D2D operation, e.g., in LTE wireless systems, by using control signaling provided by a wireless network (e.g., by an eNB). The discovery channel/channels which conveys discovery signal/signals are configured by a network (e.g., by the eNB) and are mapped to control channel/channels (e.g., one-to-one). After sending/receiving the discovery signal/signals, the D2D devices are monitoring control channel/channels to get current information for establishing the D2D communication among these D2D devices, the current information may include a resource allocation for the D2D communication and a device list of candidates for establishing the D2D communication. | 06-20-2013 |
20130182619 | Enhanced Physical Uplink Control Channel Format Resource Allocation for Time Division Duplex Mode - In one aspect thereof the exemplary embodiments provide a method that includes, when in a time division duplex mode of operation with a user equipment, allocating physical uplink control channel resources by reserving physical uplink control channel resources with a granularity of one acknowledge/negative acknowledge (ACK/NACK) bundle; and sending an indication of the allocated physical uplink control channel resources from a network access node to the user equipment. | 07-18-2013 |
20130242821 | Apparatus and Method to Reduce Interference between Frequency-Division Duplex and Time-Division Duplex Signals in a Communication System - An apparatus, method and system to reduce interference between frequency-division duplex and time-division duplex signals in a communication system. In one embodiment, an apparatus includes a processor ( | 09-19-2013 |