Patent application number | Description | Published |
20100232345 | System and Method for Smart Relay Operation in a Wireless Communications System - A system and method for smart relay operation in a wireless communications system is provided. A method for smart relay operations includes receiving, at a smart relay, a transmission from a communications device, the transmission destined for a controller, decoding the transmission, computing a response based on the decoding, and transmitting the response to the controller. | 09-16-2010 |
20100254301 | System and Method for Assigning Backhaul Resources - A system and method for assigning backhaul resources is provided. A method for wireless relay network communications includes determining performance information regarding a plurality of relay nodes, allocating resource blocks in a subframe to relay nodes based on the information, and notifying relay nodes of the allocated RBs using a signaling message. | 10-07-2010 |
20110249640 | System and Method for Transmitting Control Information - A system and method for transmitting control information are provided. A method for communications controller operations includes combining control data for each relay node of at least one relay node into a control channel data stream, mapping a plurality of transmission resources for the control channel data stream into a plurality of physical resource blocks using a distributed virtual resource mapping rule, and transmitting the plurality of physical resource blocks to the set of at least one relay node. The plurality of transmission resources are mapped to physical resource blocks that are non-contiguous in a frequency domain. | 10-13-2011 |
20110268056 | System and Method for Allocating Network Resources for a Communications Link - A system and method for a system and method for allocating network resources for a communications link are provided. A method for communications controller operations includes allocating network resources to a communications link. The communications link includes an uplink (UL) part and a downlink (DL) part. The method also includes if a type of the allocated network resources is not equal in the DL part and the UL part, transmitting a first indication of the allocated network resources for one part of either the UL part or the DL part and a second indication of the allocated network resources for a remaining part of either the UL part or the DL part. The first indication and the second indication are based on an amount of network resources allocated. The method further includes if the type of the allocated network resources is equal in the DL part and the UL part, transmitting an indication of the allocated network resources for one part of either the UL part or the DL part. The indication is based on an amount of network resources allocated. | 11-03-2011 |
20110317615 | System and Method for Adapting Code Rate - A system and method for adapting code rate are provided. A method for a first communication device to transmit a resource assignment to at least one communication device includes assigning at least one transmission resource to transmit the resource assignment, adapting a code rate of an encoded payload based on the at least one transmission resource and a threshold, thereby producing an adapted payload, and transmitting the adapted payload. | 12-29-2011 |
20120083201 | System and Method for Distributed Power Control in a Communications System - An embodiment method for power control in a multi-hop communications system includes transmitting a power usage pattern for each relay node in a subset of relay nodes served by a communications controller, where the power usage pattern specifies transmit power levels for the relay node while the relay node is operating in a power control mode. The method also includes receiving channel measurements of access links between the relay nodes in the subset of relay nodes and subscriber equipment served by the relay nodes, determining backhaul link transmit power levels and access link transmit power levels based on the channel measurements of access links and channel measurements of backhaul links between the communications controller and the relay nodes, and transmitting the access link power levels to the subset of relay nodes. | 04-05-2012 |
20120083203 | System and Method for Distributed Power Control in a Communications System - A system and method for distributed power control in a communications system are provided. A method for relay node operations includes transmitting a signal at a transmit power level on a first channel from a relay node to a user equipment, receiving a message comprising a first indication of channel quality of the first channel at the transmit power level, and determining a second indication of channel quality of a second channel between a communications controller and the relay node, where the first channel and the second channel are in a same multi-hop communication path. The method also includes altering the transmit power level of the first channel based on the first indication of channel quality and the second indication of channel quality to converge the channel quality of the first channel to a convergence value. | 04-05-2012 |
20120087318 | System and Method for Search Space Reconfiguration in a Communications System - A system and method for search space reconfiguration in a communications system are provided. A method for communications controller operations includes reconfiguring a first search space including a first set of resources into a second search space including a second set of resources, signaling second search space information to a communications device, and signaling a first set of other information to the communications device within an intermediate search space including resources common to both the first set of resources and the second set of resources. | 04-12-2012 |
20120120891 | System and Method for Resource Management in a Communications System - A method for operating a communications controller includes defining a positive integer quantity of resource element groups from a resource block with a positive integer number N resource elements in each resource element group, the resource block having a total number of resource elements, the total number of resource elements consisting of available resource elements and reserved resource elements. The method also includes assigning a plurality of available resource elements to fill in each of the positive integer quantity of resource element groups with N available resource elements in each resource element group, and blocking any unassigned available resource elements from being used in a resource element group. The method further includes interleaving a plurality of control messages onto the positive integer quantity of resource element groups, and transmitting the positive integer quantity of resource element groups. | 05-17-2012 |
20120207126 | Control Channel Transmission and Reception Method and System - A first central controller of a wireless system selects a common reference signal (“CRS”) pattern for muting on a first type of control channel by the first central controller, the first type of control channel formed with resource elements (“REs”), identifies, for a first set of user equipments (“UEs”) in a serving area of the first central controller, a set of subframes including the first type of control channel, the set of subframes having REs that overlap the CRS pattern for muting, mutes the overlapping REs in the first type of control channel, frequency-division multiplexes the first type of control channel with data channels, and transmits, to the first set of UEs, the first type of control channel with the muted REs on the identified set of subframes. | 08-16-2012 |
20120250551 | System and Method for Transmission and Reception of Control Channels in a Communications System - A method for transmitting control information to a wireless node includes determining, by a communications controller, a region for the control information in a subframe as at least one of a data region and a control region of the subframe. The method also includes modulating, by the communications controller, the control information, and mapping, by the communications controller, the modulated control information onto resources of the subframe according to the determined region. The method further includes transmitting, by the communications controller, the subframe to the wireless node. | 10-04-2012 |
20120250641 | System and Method for Signaling a Location of a Control Channel - A method for transmitting control information to a wireless node in a communications system includes mapping, by a communications controller, the control information onto resources associated with a wireless node specific search space, the wireless node specific search space being located in a first data region of a first subframe, the first subframe including a first common search space in addition to the wireless node specific search space. The method also includes generating, by the communications controller, a location indicator identifying a location of the wireless node specific search space. The method further includes transmitting, by the communications controller, the first subframe to the wireless node, and transmitting, by the communications controller, the location indicator to the wireless node. | 10-04-2012 |
20120250642 | System and Method for Transmission and Reception of Control Channels - A method for transmitting control information to a wireless node includes determining, by a communications controller, a first resource assignment parameter according to a pseudo-random sequence derived from an identifier, and mapping, by the communications controller, using the first resource assignment parameter, a demodulation reference signal associated with the wireless node onto a first resource located in a data region of a subframe. The method also includes mapping, by the communications controller, modulated control information associated with the wireless node onto a second resource located in the data region of the subframe, and transmitting, by the communications controller, the subframe to the wireless node. | 10-04-2012 |
20120252447 | System and Method for Transmitting and Receiving Control Channels - A method for transmitting resource allocation information to a wireless node in a communications system includes selecting a search space from one of a first search space and a second search space, the first search space associated with a first set of control channel parameters and the second search space associated with a second set of control channel parameters. The method also includes modulating the first control information, and mapping the modulated first control information onto the selected search space in a first subframe, where at least one of modulating the first control information and mapping the modulated first control information is according to a selected set of control channel parameters associated with the selected search space. The method further includes transmitting the first subframe to the wireless node, and transmitting a first parameter indicator identifying the selected set of control channel parameters to the wireless node. | 10-04-2012 |
20120263210 | System and Method for Two-way Relaying with Beamforming - A system and method for two-way relaying with beamforming are provided. A method for relay operations includes estimating communications channels between a relay and communications devices coupled to the relay, storing data contained in the transmissions, storing data contained in the transmissions, precoding a transmission including a subset of the stored data with a precoding matrix, and transmitting the precoded transmission. The estimating is based on transmissions made by the communications devices in the subset of communications devices, and the precoding matrix is based on estimates of the communications channels. | 10-18-2012 |
20130010836 | System and Method for Communicating Reference Signals - A method for communicating DM-RS symbols to support MIMO transmissions having five or more layers of spatial multiplexing. A first subframe is communicated carrying two leading symbols of a first length-4 OCC sequence and two leading symbols of a second length-4 OCC sequence, and a second subframe is communicated carrying two trailing symbols of the first length-4 OCC and two trailing symbols of the second length-4 OCC sequence. Optionally four length-2 OCCs can be carried in a similar manner or, alternatively, in different frequency bands or resource block pairs of a common subframe. | 01-10-2013 |
20130044678 | System and Method for Reducing Interference - A system and method for reducing interference are provided. A method for communications controller operations in a multi-carrier system includes generating information for a broadcast channel, preparing the information for transmission, selecting a location for an unoccupied subcarrier from a plurality of available locations, and placing the prepared information into a plurality of contiguous subcarriers, where the plurality of contiguous subcarriers includes the unoccupied subcarrier and a plurality of other subcarriers. The method also includes transmitting the plurality of contiguous subcarriers. | 02-21-2013 |
20130077542 | Hybrid In-Band/Out-of-Band Relays - In accordance with an embodiment, a method of operating a wireless relay device includes establishing a first connection to a base station using a first set of frequency bands, establishing a second connection to a user device using the first set of frequency bands, and establishing a third connection to the base station using a second set of frequency bands. | 03-28-2013 |
20130083769 | Wireless Communication Control Channel Systems and Methods - Radio resources can be allocated in a manner avoiding a zero power problem by selecting one of two reference signals for control channel estimation, and transmitting the selected reference signal in a resource block (RB) or RB pair carrying the control channel. The two reference signals span common resource elements (REs) in the RB or RB pair. Alternatively, a zero power problem can be avoided by assigning modified WALSH codes to the two reference signals, and transmitting the two reference signals in the RB or RB pair carrying the control channel in accordance with their modified WALSH codes. The modified WALSH codes include complex constants having a non-zero phase difference with one another. A control channel can be evenly partitioned in accordance with a checkerboard partitioning technique. | 04-04-2013 |
20130094458 | System and Method for Data Channel Transmission and Reception - A method for operating a communications controller includes allocating a number of resource blocks to an enhanced physical downlink shared channel (ePDSCH), and identifying a starting point for the resource blocks of the ePDSCH, the starting point located within a control region of a subframe. The method also includes signaling to a user equipment (UE) the starting point of the resource blocks and the number of resource blocks allocated to the ePDSCH. | 04-18-2013 |
20130182633 | System and Method for Wireless Link Configuration - A method for operating a relay node during a handoff from a first controller to a second controller includes receiving a first instruction from the first controller to discontinue using a first set of wireless backhaul link resources allocated to the relay node by the first controller and to temporarily use a second set of wireless backhaul link resources dedicated by the second controller. The method also includes receiving a second instruction from the second controller to discontinue using the second set of wireless backhaul link resources and to begin using a third set of wireless backhaul link resources allocated to the relay node by the second controller. | 07-18-2013 |
20130223318 | System and Method for Message Acknowledgment Feedback for Device-to-Device Communication Overlaid on a Cellular Network - An embodiment of a system for operating a communications controller for a group of user equipments engaged in a direct mobile communication (“DMC”) link in a wireless communications system is provided. The communications controller is configured to allocate a set of subframes to the group of UEs for the DMC link, signal the set of allocated subframes to the group of UEs, and signal a length of a sliding window to the group of UEs. In an embodiment, ACK/NACK feedback for communications over the DMC link is aggregated according to the length of the sliding window, and the ACK/NACK feedback for the communications over the DMC link is determined independently from ACK/NACK feedback for cellular transmission between the communication controller and the group of UEs. In an embodiment, the length of the sliding window is a number of subframes. | 08-29-2013 |
20130223352 | System and Method for Allocating Network Resources - A method for operating a user equipment (UE) in a UE group including at least two UEs includes receiving, from a communications controller, network resources information about an allocation of a first set of network resources to the UE group and a transmission indication, where the transmission indication indicates that the UE is selected to transmit in a second set of network resources that is a subset of the first set of network resources. The method further includes transmitting, to other UEs in the UE group utilizing a direct mobile communications (DMC) link associated with the communications controller, a first message including a control indicator in a first subset of the second set of network resources, the control indicator indicating scheduling information for a second subset of the second set of network resources. | 08-29-2013 |
20130223353 | System and Method for Time Resource Allocation for Device-to-Device Communication Overlaid on a Cellular Network - An embodiment of a system for operating a communications controller and a user equipment in a wireless communications system is provided. The communications controller is configured to allocate a first set of subframes to a group of UEs for a DMC link, allocate a second set of subframes to a particular UE in the group of UEs, transmit a first message including information about the first set of subframes to the group of UE, and transmit a second message including information about the second set of subframes to the particular UE. The second set of subframes is a subset of the first set of subframes, and information about the second set includes subframes in which the particular UE may transmit to other UEs in the group of UEs. Subframes in the first set not in the second set are allocated for reception by the particular UE. | 08-29-2013 |
20130225184 | System and Method for Hybrid Automatic Repeat Request Timing for Device-to-Device Communication Overlaid on a Cellular Network - An embodiment of a system for operating a communications controller for a group of user equipments engaged in a DMC link in a wireless communications system is provided. The communications controller is configured to allocate a set of subframes in one periodic group of subframes to the group of UEs for the DMC link, signal the set of allocated subframes to the group of UEs, and transmit parameters related to a group of HARQ processes of the DMC link. In an embodiment, the communication controller uses HARQ processes for cellular UE transmission that are determined independently from HARQ processes of the group of HARQ processes for the DMC link, and the parameters are configured to enable the group of UEs to manage the group of HARQ processes for the DMC link. | 08-29-2013 |
20130229957 | System and Method For Device-To-Device Communication - Various methods of dynamically allocating resources to user equipments in a DMC group are provided. By way of example, some methods dynamically allocate resources to user equipments in a DMC group in a manner that avoids interfering with user equipments outside the DMC group. Other methods dynamically allocate resources to user equipments in a DMC group in a manner that specifically identifies which of the user equipments in the DMC group is authorized to transmit and which are required to receive. | 09-05-2013 |
20130242904 | Systems and Methods for UE-Specific Search Space and ePDCCH Scrambling - Encoded control information can be mapped to an enhanced physical downlink control channel (ePDCCH) search space of a user equipment (UE) in accordance with an offset and aggregation level. The ePDCCH search space may include a physical resource block (PRB) set located in a data region of a downlink subframe. The encoded control information may be mapped into one or more enhanced control channel elements (eCCEs) of the ePDCCH search space beginning from a starting location. The starting location is an eCCE location within the PRB set. The PRB set, as well as the starting/eCCE location within the PRB set, are identified in accordance with an offset associated with the UE. A number of eCCEs carrying encoded information corresponds to an aggregation level. | 09-19-2013 |
20130286862 | System and Method for Direct Mobile Communications Link Establishment - A method of establishing a direct mobile communications (DMC) link between a first user equipment (UE) and a second UE, where at least one of the first UE and the second UE is communicating on a first cellular link includes requesting that at least one of the first UE and the second UE participate in an evaluation procedure to determine a potential quality of a DMC link proposed between the first UE and the second UE. The method also includes receiving a report from at least one of the first UE and the second UE indicating the potential quality of the DMC link proposed between the first UE and the second UE according to the evaluation procedure. The method further includes establishing the DMC link between the first UE and the second UE if the potential quality of the DMC link exceeds a predetermined threshold. | 10-31-2013 |
20130301561 | System and Method for Antenna Port Association - In one embodiment, a method for antenna port association includes determining a permutation index in accordance with a user equipment (UE) specific configuration parameter of a UE and determining a mapping of a first plurality of physical resource elements to a second plurality of antenna ports in accordance with the permutation index. The method also includes receiving, by the UE, data in a first antenna port of the second plurality of antenna ports in accordance with the mapping. | 11-14-2013 |
20140066113 | Bi-Directional Training in Dual Networks System - A method and apparatus for bi-direction training in D2D/cellular networks. An embodiment method includes sending training symbols to sense interference from the cellular UEs, calculating an interference subspace from the cellular UE to each of the D2D UEs, calculating an orthogonal projection matrix based on the interference subspace calculated, and iteratively updating receive filters through forward training and transmit beamformers through backward training after the orthogonal projection matrix is calculated to align the D2D UEs. In an embodiment, training symbols are sent to sense interference from the cellular UE. | 03-06-2014 |
20150098422 | METHOD FOR AVOIDING COLLISIONS BETWEEN OPEN DISCOVERY AND CELLULAR RESOURCE - A device is configured to perform a method of wireless communication in a wireless communication network. The method includes receiving, from a communications controller, a device-to-device (D2D) subframe configuration to communicate with one or more second wireless devices, the subframe configuration indicating one or more subframes in which to transmit a D2D signal or receive one or more D2D signals. The method also includes receiving, from the communications controller, scheduling information to transmit a first signal to the communications controller on a subframe indicated by the D2D subframe configuration. The method further includes prioritizing the transmission of the first signal over a transmission of the D2D signal or a reception of the one or more D2D signals, and transmitting the first signal. | 04-09-2015 |
20150099514 | OPERATING STATES FOR D2D DISCOVERY - A device is configured to perform a method of device-to-device (D2D) communication in a wireless communication network in accordance with a Long Term Evolution (LTE) standard. The method includes entering an RRC-Idle state or an RRC-Connected state. The method also includes transmitting, in the RRC-Idle state or RRC-Connected state, a D2D discovery signal for receipt by at least one second device in the network. The method further includes receiving, in the RRC-Idle state or RRC-Connected state, at least one D2D discovery signal from the at least one second device in the network. | 04-09-2015 |
20150181582 | Wireless Communication Control Channel Apparatus and Method - An apparatus and method for control channel transmission in a wireless network are disclosed. A disclosure is provided with at least one resource block (RB) including a first control channel element associated with a first antenna port (AP) and a second control channel element associated with a second AP. The first and second control channel elements might be used for transmission of a single control channel, and a first reference signal sequence associated with one of the first AP and the second AP is selected for transmission of the single control channel based on a control channel element index value, such that a resource element of the at least one RB can be detected to decode the first control channel element and the second control channel element. | 06-25-2015 |
20150223263 | System and Method for Transmitting Control Information - A system and method for transmitting control information are provided. A method for communications controller operations includes combining control data for each relay node of at least one relay node into a control channel data stream, mapping a plurality of transmission resources for the control channel data stream into a plurality of physical resource blocks using a distributed virtual resource mapping rule, and transmitting the plurality of physical resource blocks to the set of at least one relay node. The plurality of transmission resources are mapped to physical resource blocks that are non-contiguous in a frequency domain. | 08-06-2015 |
Patent application number | Description | Published |
20140269392 | System and Method for Direct Mobile Communication - Embodiments are provided reducing interference between cellular and direct mobile communication (DMC) links in wireless systems. In embodiment, a method performed by a network controller includes sending, to a second network controller, information of resources for a first set of DMC links between DMC user equipments (UEs). The first set of DMC links is associated with the network controller. The method further includes receiving second information of resources for a second set of DMC links associated with the second network controller. The network controller coordinates with the second network controller the allocation of network resources for the first set of DMC links between the DMC UEs. The network resources comprise cellular and DMC resources. | 09-18-2014 |
20140269558 | System and Method for Time-Power-Frequency Hopping for D2D Discovery - Embodiments are provided to implement a time/power/frequency hopping scheme for device-to-device (D2D) discovery. The embodiments improve the UE detection of D2D discovery signals from neighboring UEs and account for large number of UEs' discovery signals. This is achieved by having neighboring UEs transmitting at different time instances and at different power levels. Further, neighboring UEs can be configured to transmit on different frequencies. This is achieved by assigning different time/power/frequency sequences to different UEs. An embodiment method includes transmitting, to a UE, parameters a hopping pattern of a first sequence of resources for transmitting a discovery signal by the UE and of a second sequence of resources for receiving a second discovery signal by the UE. The first sequence of resources comprises at least one of a sequence of time instances and a sequence of power levels. The second sequence of resources comprises time instances. | 09-18-2014 |
20140334354 | System and Method for TDD Configuration for D2D Open Discovery - Embodiments are provided to support device-to-device (D2D) communications in a time-division duplexing (TDD) communications system, and ensure that D2D discovery signals are transmitted by user devices on an uplink subframe when there is a TDD frame configuration change. In an embodiment, a user device receives form the network a TDD frame configuration selected from a set of available TDD frame configurations according to the TDD configuration. The device further receives a D2D discovery configuration for a discovery time interval. The user device then allocates a transmission resource a D2D discovery signal within the discovery time interval according to the D2D discovery configuration. The user device is also configured to receive from another device a second D2D discovery signal during the discovery time interval in accordance with the TDD configuration and the D2D discovery configuration. | 11-13-2014 |
20140334436 | Control Channel Transmission and Reception Method and System - In an embodiment method, a first central controller of a wireless system selects a first common reference signal (“CRS”) pattern for muting on a first type of control channel by the first central controller, wherein the first type of control channel is formed with resource elements (“REs”), and selects a second CRS pattern for muting on a first data channel by the first central controller, where the first CRS pattern and the second CRS pattern are separately configured. The central controller identifies a set of subframes including the first type of control channel, where the set of subframes has REs that overlap the first CRS pattern for muting, and mutes the overlapping REs in the first type of control channel when the set of subframes are not multicast broadcast single frequency network subframes, and frequency-division multiplexes the first type of control channel with the first data channel. | 11-13-2014 |
20140335853 | System and Methods for Controlling Out-of-Network D2D Communications - Embodiments are provided herein for determining a synchronizing master for device-to-device (D2D) communication in a cellular network environment. In an embodiment, a user equipment (UE) receives a discovery signal comprising a timing reference, and determines a transmitter of the discovery signal. In accordance with the determination of the transmitter of the discovery signal, the UE performs one of synchronizing to the timing reference in the discovery signal and transmitting a second discovery signal. The UE performs the synchronizing to the timing reference if the transmitter of the discovery is a cellular network. Alternatively, the UE transmits the second discovery signal upon determining that the transmitter of the discovery signal is a second UE that is out of coverage of a cellular network. | 11-13-2014 |
20140362816 | System and Method for Message Acknowledgment Feedback for Device-to-Device Communication Overlaid on a Cellular Network - An embodiment of a system for operating a communications controller for a group of user equipments engaged in a direct mobile communication (“DMC”) link in a wireless communications system is provided. The communications controller is configured to allocate a set of subframes to the group of UEs for the DMC link, signal the set of allocated subframes to the group of UEs, and signal a length of a sliding window to the group of UEs. In an embodiment, ACK/NACK feedback for communications over the DMC link is aggregated according to the length of the sliding window, and the ACK/NACK feedback for the communications over the DMC link is determined independently from ACK/NACK feedback for cellular transmission between the communication controller and the group of UEs. In an embodiment, the length of the sliding window is a number of subframes. | 12-11-2014 |
20150043483 | System and Method for Resource Allocation for Open Discovery in Device-to-Device Communications - A method for performing open discovery in a communications system includes determining, by a device-to-device (D2D) device, resource allocation information for a discovery cycle including discovery resources allocated for transmission of discovery signals by D2D devices. The method also includes selecting, by the D2D device, a first discovery resource of the discovery cycle in accordance with the resource allocation information, and transmitting, by the D2D device, a discovery signal in the selected first discovery resource. | 02-12-2015 |
20150045050 | System and Method for Resource Allocation Device-to-Device for Open Discovery - A method for operating a mobile device adapted for device-to-device (D2D) communications includes determining a utilization measure for discovery resources (DRs) allocated for D2D discovery in a communications system, and sending a utilization measure report to an evolved NodeB (eNB) when a reporting criterion is satisfied, wherein the utilization measure report is configured to prompt an adjustment to a number of DRs allocated for D2D discovery when an adjustment condition is met. | 02-12-2015 |
20150085743 | System and Method for Adapting Code Rate - A system and method for adapting code rate are provided. A method for a first communication device to transmit a resource assignment to at least one communication device includes assigning at least one transmission resource to transmit the resource assignment, adapting a code rate of an encoded payload based on the at least one transmission resource and a threshold, thereby producing an adapted payload, and transmitting the adapted payload. | 03-26-2015 |
20150117375 | System and Method for Device-to-Device Synchronization - A method and system for including a base station that configures a first user equipment (UE) that is in a radio resource control connected state with the base station. The UE is configured to be a synchronization source and transmit a first device-to-device synchronization signal (D2DSS) by using a synchronization resource that comprises a time resource, a frequency resource or a time and frequency resource. The base station instructs the first UE to transmit the first D2DSS using the synchronization resource. The base station signals the UE to configure the UE separately from the signal to transmit the D2DSS, and both of the signals are performed with radio resource control signaling from the base station to the UE. | 04-30-2015 |
20150124579 | System and Method for Transmitting a Synchronization Signal - A method for device-to-device (D2D) communications includes generating, by a synchronization source, a primary device-to-device synchronization signal that is different from a primary synchronization signal (PSS) sent by an Evolved NodeB (eNodeB) and an existing uplink (UL) signal sent by device-to-device communications devices, and transmitting, by the synchronization source, the primary device-to-device synchronization signal in a single carrier frequency division multiple access (SC-FDMA) waveform. | 05-07-2015 |
20150131587 | System and Method for Resource Management in a Communications System - A method for operating a communications controller includes defining a positive integer quantity of resource element groups from a resource block with a positive integer number N resource elements in each resource element group, the resource block having a total number of resource elements, the total number of resource elements consisting of available resource elements and reserved resource elements. The method also includes assigning a plurality of available resource elements to fill in each of the positive integer quantity of resource element groups with N available resource elements in each resource element group, and blocking any unassigned available resource elements from being used in a resource element group. The method further includes interleaving a plurality of control messages onto the positive integer quantity of resource element groups, and transmitting the positive integer quantity of resource element groups. | 05-14-2015 |
20150201392 | System and Method for Device-to-Device Communications - A method for device-to-device (D2D) communication includes determining that a first user equipment (UE) is out-of-coverage, the first UE having been previously in-coverage on a first cell. The method also includes starting a timer upon determining that the first UE is out-of-coverage and determining whether the first UE has returned to be in-coverage after starting the timer. Additionally, the method includes determining whether the timer has expired and communicating, by the first UE directly with a second UE, using out-of-coverage resources from the first cell when the timer has not expired and the first UE has not returned to be in-coverage. | 07-16-2015 |