Patent application number | Description | Published |
20100142556 | METHOD AND APPARATUS RELATED TO PACKET FRAGMENTATION AND RECONSTRUCTION - Methods and apparatus related to packet fragmentation and reconstruction are described. A sequence of bits is generated including at least one header and at least partial packet payload prior to a determination of the actual data rate to be used in a communications segment. In some embodiments, the generated sequence of bits corresponds to a prepared information bit stream for a best case scenario in which the highest data rate is selected for segment. Various embodiments allow for the selection of the data rate to be used for the communications segment to be delayed until just prior to the transmission. Thus the selection of the data rate for the communications segment, and thus the segment capacity, can be based on more current channel condition information than would otherwise be possible if the communications device needed to know the data rate for the segment before performing header and packet fragmentation operations. | 06-10-2010 |
20100309781 | SWITCHING BETWEEN MIMO AND RECEIVER BEAM FORMING IN A PEER-TO-PEER NETWORK - Aspects describe different multiple antenna techniques that can be utilized in a peer-to-peer network based on a network congestion level. A MIMO scheme where a transmitter sends to a receiver multiple spatial streams at substantially the same time in the same traffic segment can be utilized when network congestion level is low. A receiver beam forming scheme where transmitter sends a single stream in a traffic segment and receiver uses multiple receive antennas to maximize signal to noise ratio can be utilized when network congestion level is high. The connection pair (transmitter and receiver) occupy more control resources in the MIMO scheme than the receiver beam forming scheme. The decision related to which technique to utilize can be made at about the same time as a communication is initiated. Further, if network conditions change during a communication, the antenna technique that is utilized can be switched to a different technique during the communication exchange. | 12-09-2010 |
20110222515 | METHODS AND APPARATUS FOR SUPPORTING SYNCHRONIZATION BETWEEN GROUPS OF DEVICES - Methods and apparatus related to supporting rapid synchronization between groups of wireless communications devices are described. Described methods and apparatus are well suited for use in peer to peer wireless communications systems in which a plurality of ad hoc peer to peer networks may be formed, each ad hoc network operating with its own notion of time. As two groups of devices, having different notions of time, come within proximity of one another, a wireless communications device of a first group detects the presence of a member of a second group. The wireless device determines that network timing re-synchronization is to be performed by one of the first and second groups and transmits a re-synchronization alert signal on a dedicated resource. Subsequently, the wireless device transmits a timing synchronization signal in accordance with new timing. Intended devices, which detect the alert signal and timing synchronization signal, adjust their internal timing. | 09-15-2011 |
20120008618 | METHODS AND APPARATUS FOR TIMING SYNCHRONIZATION USING MULTIPLE DIFFERENT TIMING SIGNAL SOURCES - A wireless terminal detects timing signals from different local timing signal sources. The wireless terminal selects from the plurality of detected timing signal sources two timing signal sources in accordance with a predetermined timing signal source priority ordering. In some embodiments, the wireless terminal intentionally selects two timing signal sources which are not synchronized with respect to one another. The wireless terminal determines a first set of peer communications time intervals corresponding to a first selected timing signal source and a second set of peer communications time intervals corresponding to a second selected timing signal source. The wireless terminal transmits a peer to peer signal, e.g., a peer discovery signal, during at least one of the first set of peer communications time intervals. The wireless terminal transmits a peer to peer signal, e.g., a peer discovery signal, during at least one of the second set of peer communications time intervals. | 01-12-2012 |
20120087253 | METHODS AND APPARATUS FOR RESOURCE ALLOCATION FOR PEER-TO-PEER DATA IN NON PEER-TO-PEER RESOURCES - A method of operating a wireless device includes communicating in one of peer-to-peer data resources or non peer-to-peer resources. The peer-to-peer data resources include a first set of peer-to-peer resources with a first bandwidth and a second set of peer-to-peer resources with a second bandwidth greater than the first bandwidth. The first set of peer-to-peer resources is parallel in time with the non peer-to-peer resources. In addition, the method includes estimating a signal quality for a data transmission on the peer-to-peer data resources. Furthermore, the method includes determining whether to send the data transmission in one of the first set of peer-to-peer resources or the second set of peer-to-peer resources based on the estimated signal quality. | 04-12-2012 |
20120087347 | METHODS AND APPARATUS FOR JOINT SCHEDULING OF PEER-TO-PEER LINKS AND WIRELESS WIDE AREA NETWORK LINKS IN CELLULAR NETWORKS - A wireless device, a method, and a computer program product in a wireless device are provided in which a scheduling control signal is received in peer-to-peer resources. In addition, whether to yield a data transmission is determined based on the received scheduling control signal. Furthermore, the data transmission is sent to a base station on the peer-to-peer resources upon determining not to yield the data transmission. A base station, a method, and a computer program product in a base station are also provided in which a scheduling control signal is received in peer-to-peer resources. In addition, whether to yield a data transmission is determined based on the received scheduling control signal. Furthermore, the data transmission is sent to a wireless device on the peer-to-peer resources upon determining not to yield the data transmission. | 04-12-2012 |
20120117155 | METHODS AND APPARATUS FOR RESOURCE ALLOCATIONS TO SUPPORT PEER-TO-PEER COMMUNICATIONS IN CELLULAR NETWORKS - A method of operating a wireless device associated with a first cell includes receiving information on a first set of resources for intracell peer-to-peer communication and on a second set of resources for intercell peer-to-peer communication. In addition, the method includes utilizing at least one of the first set of resources to communicate with a second wireless device within the first cell or the second set of resources to communicate with the second wireless device within a second cell based on the received information. | 05-10-2012 |
20120134456 | METHODS AND APPARATUSES FOR SYNCHRONIZATION OF WIRELESS DEVICES IN WIRELESS NETWORKS - To maintain a synchronized wireless peer group, timing signals may be periodically transmitted by one or more devices in the wireless peer group. These periodic timing signals may be transmitted by different wireless devices in the peer group, distributing (sharing) the transmit power burden among the different wireless devices, increasing the useful operation time of the individual wireless devices. Similarly, the wireless peer group may monitor for timing signals received from devices that are not part of the wireless peer group. This monitoring burden may also be distributed (shared) among the devices in the peer group allowing for a greater sleep time for individual wireless devices, increasing the useful operation time of the individual wireless devices. | 05-31-2012 |
20120147823 | METHODS AND APPARATUS FOR SCHEDULING OF PEER-TO-PEER COMMUNICATION IN A WIRELESS WIDE AREA NETWORK SPECTRUM - A method of wireless communication includes determining peer-to-peer scheduling resources. The peer-to-peer scheduling resources are parallel in time to and multiplexed with non peer-to-peer resources. The peer-to-peer scheduling resources include a plurality of serial scheduling resource segments. Each of the serial scheduling resource segments provides contention resolution for a set of peer-to-peer links. In addition, the method includes communicating in one of the serial scheduling resource segments and/or the non peer-to-peer resources. | 06-14-2012 |
20120182907 | METHODS AND APPARATUS FOR CONTROLLING PEER TO PEER COMMUNICATIONS - A wireless communications system supports both cellular communications and direct peer to peer communications. The cellular communications use FDD downlink and uplink bands for control and traffic signaling. An access point employs control over direct peer to peer communications. Peer to peer mode control signals from the access point are transmitted to wireless terminals using the FDD cellular downlink band. Peer to peer mode control signals from wireless terminals are transmitted to an access point using the FDD cellular uplink band. Peer to peer traffic signals between wireless terminals are communicated using a TDD band. In one embodiment, the access point communicates priority information to peer to peer network wireless terminals, and the wireless terminals make peer to peer traffic transmission decisions in a decentralized manner using the received priority information. In another embodiment, the access point directly schedules peer to peer traffic in the peer to peer network. | 07-19-2012 |
20120182962 | METHODS AND APPARATUS FOR SCHEDULING PEER TO PEER TRAFFIC IN CELLULAR NETWORKS - A wireless terminal receives peer to peer resource control information from a base station. The peer to peer resource control information is used by the wireless terminal in a peer to peer network to control transmission scheduling and/or resource utilization. The base station sends the control signals at a first rate which is slower than the rate at which wireless terminals make transmission decisions for traffic slots. During the intervals between receipt of the base station control signals, wireless terminals make transmission decisions with regard to multiple traffic segments. The decisions are also influenced based on peer to peer signaling occurring between the wireless terminals in the network for each traffic slot. Resource utilization feedback information is provided from the wireless terminal to the base station. Based on the feedback information the base station updates the resource utilization control information and sends updated resource utilization control signals to the wireless terminals. | 07-19-2012 |
20120185605 | METHODS AND APPARATUS FOR DETERMINING AND/OR USING A COMMUNICATIONS MODE - Methods and apparatus for determining whether two or more communications devices, e.g., wireless terminals, in a communications system should communicate using direct peer to peer communications or via one or more infrastructure elements, e.g., base stations, are described. The determination whether a given pair of communications devices should communicate using direct peer to peer communications, rather than via the infrastructure element(s), is determined by a control device. The control device instructs various wireless terminals to make various signal measurements and/or transmit signals to be measured. Based on the signal measurements the control device estimates interference caused by the direct peer to peer link to the existing communications devices, the direct peer to peer link channel quality and/or interference caused to such a direct peer to peer link by existing communications devices which are communicating using peer to peer signaling and makes a mode decision based on such information. | 07-19-2012 |
20120252510 | METHODS AND APPARATUS FOR ASSIGNING RESOURCES TO SCHEDULE PEER-TO-PEER COMMUNICATIONS IN WWAN - A method of operating a wireless device includes determining an energy on each of a plurality of resources for broadcasting CIDs, sending information to a base station based on the determined energy for each of the CIDs, and receiving a CID from the base station. The received CID is one of the CIDs determined based on the information. A method of wireless communication includes receiving first information about a first plurality of CIDs from a first wireless device, receiving second information about a second plurality of CIDs from a second wireless device, comparing the first information and the second information to determine a subset of CIDs based on the first plurality of CIDs and the second plurality of CIDs, selecting a CID based on the subset of CIDs, and sending the selected CID to at least one of the first wireless device or the second wireless device. | 10-04-2012 |
20120269072 | METHODS AND APPARATUS FOR CONTROLLING INTERFERENCE FROM PEER DISCOVERY IN WWAN - A method, an apparatus, and a computer program product are provided in which at least one of a peer-to-peer transmit power or a peer-to-peer duty cycle is adjusted based on at least one of a path loss to a serving base station or a path loss to at least one neighboring base station. In addition, a peer-to-peer signal is sent with the peer-to-peer transmit power or the peer-to-peer duty cycle. | 10-25-2012 |
20120269178 | METHODS AND APPARATUS FOR TIMING SYNCHRONIZATION FOR PEER TO PEER DEVICES OPERATING IN WWAN SPECTRUM - A method, an apparatus, and a computer program product are provided in which a clock timing is determined for utilizing resources including peer-to-peer resources based on a WWAN downlink receive timing and a WWAN uplink transmit timing. In addition, the clock timing is utilized for peer-to-peer communication with the peer-to-peer resources. | 10-25-2012 |
20130064187 | METHODS AND APPARATUS FOR WAN ASSISTED CONTENTION DETECTION & RESOLUTION IN PEER TO PEER NETWORKS - Various methods and apparatus are directed to collision detection and/or avoidance regarding peer to peer connection identifiers. A wireless communications device broadcasts a signal indicating its acquired connection identifier in one of two alternative blocks. A base station monitors peer to peer signaling in its coverage area and tracks the usage of peer to peer connection identifiers by pairs of devices. The base station detects when multiple pairs of devices are using the same peer to peer connection identifier. The base station provides assistance to the peer to peer network to avoid a collision or facilitate rapid collision detection by the peer to peer devices. In one approach the base station sends an instruction for a connection to switch its connection identifier. In another approach the base station sends a connection a message to bias its selection as to which of the two alternative blocks to use for transmission. | 03-14-2013 |
20130064214 | METHODS AND APPARATUS FOR INTERFERENCE BASED JOINT SCHEDULING OF PEER TO PEER LINKS WITH WWAN - A method of operating a first wireless device includes receiving a grant from a base station for peer-to-peer communication with a second wireless device using time-frequency resources utilized by a third wireless device for WWAN communication with the base station. In addition, the method includes receiving a transmit power for the peer-to-peer communication with the grant. The transmit power is determined based on an interference that can be caused to transmissions received by the base station from the third wireless device. Furthermore, the method includes communicating with the second wireless device at a power less than or equal to the received transmit power using peer-to-peer communication on the time-frequency resources. | 03-14-2013 |
20130065625 | METHODS AND APPARATUS FOR ADAPTIVE PAGING IN PEER-TO-PEER NETWORKS - A method, a computer program product, and an apparatus are provided. The apparatus determines paging resources of a plurality of paging resources allocated for listening to paging messages. In addition, the apparatus transmits information indicating the allocated paging resources in a peer discovery signal. The apparatus may determine the paging resources on which to listen based on information received in peer discovery signals received from other wireless devices. The received information indicates the paging resources allocated to the other wireless devices. | 03-14-2013 |
20130066966 | METHODS AND APPARATUS FOR PEER DISCOVERY INTERFERENCE MANAGEMENT IN A WIRELESS WIDE AREA NETWORK - A method of operating a wireless device is provided in which the wireless device determines to use one grouping of peer discovery resources of a plurality of groupings of peer discovery resources based on one of a path loss or a distance to a base station. The plurality of groupings include a first grouping of resources having a first plurality of identical subsets of resources and a second grouping of resources having a second plurality of identical subsets of resources. Each of the first plurality of identical subsets of resources extends over at least one of a different time period or a different number of subcarriers than each of the second plurality of identical subsets of resources. The wireless device transmits a peer discovery signal on one subset of the identical subsets of said one grouping of peer discovery resources. | 03-14-2013 |
20130100947 | METHODS AND APPARATUS FOR TIMING SYNCHRONIZATION USING MULTIPLE DIFFERENT TIMING SIGNAL SOURCES - A wireless terminal detects timing signals from different local timing signal sources. The wireless terminal selects from the plurality of detected timing signal sources two timing signal sources in accordance with a predetermined timing signal source priority ordering. In some embodiments, the wireless terminal intentionally selects two timing signal sources which are not synchronized with respect to one another. The wireless terminal determines a first set of peer communications time intervals corresponding to a first selected timing signal source and a second set of peer communications time intervals corresponding to a second selected timing signal source. The wireless terminal transmits a peer to peer signal, e.g., a peer discovery signal, during at least one of the first set of peer communications time intervals. The wireless terminal transmits a peer to peer signal, e.g., a peer discovery signal, during at least one of the second set of peer communications time intervals. | 04-25-2013 |
20130259231 | METHODS AND APPARATUS FOR BASE STATION ASSISTED PEER DISCOVERY THROUGH AGGREGATION OF EXPRESSIONS - A method, an apparatus, and a computer program product for wireless communication are provided in which a UE is equipped to generate an expression associated with a wireless device for use in a peer discovery signal, generate an expression set from the expression, a first temporal frequency, and a first time duration, and transmit the generated expression set to a base station to allow the base station to broadcast each of the expressions included in the expression set at the first temporal frequency over the first time duration. Another method, apparatus, and computer program product for wireless communication are provided in which a base station is equipped to receive an expression set from a wireless device, process the received expression set to determine each of one or more instances of an expression, and transmit each of the one or more instances of the expression. | 10-03-2013 |
20130260812 | METHODS AND APPARATUS FOR CONTROLLING DEVICES WITH NO OR LIMITED WWAN CAPABILITY IN PEER TO PEER COMMUNICATION - In a wireless wide area network (WWAN) scenario, communication between UEs is facilitated through uplink/downlink channels between the UEs and a base station (i.e., WWAN link or WWAN communication). In the case that two communicating UEs are in the vicinity of each other, direct peer-to-peer communication without passing through the base station may reduce a base station load. In some scenarios, it is beneficial for devices, with no or limited WWAN capability to also participate in peer-to-peer communication. Accordingly, a method, an apparatus, and a computer program product for wireless communication are provided in which control information from a user equipment (UE) is received, the control information including information indicating resources for peer-to-peer communication, a peer-to-peer link with the UE to receive authentication information for using the resources is established, and the resources are used to communicate with a peer device. | 10-03-2013 |
20130272145 | METHODS AND APPARATUS FOR OPPORTUNISTIC SCHEDULING OF PEER TO PEER LINKS IN WIDE AREA NETWORK - A method, a computer program product, and an apparatus are provided. The apparatus determines an availability of a wireless wide area network (WWAN) subframe, and utilizes the WWAN subframe for peer-to-peer communication when the WWAN subframe is available. Accordingly, peer mobile terminals or devices may establish direct peer-to-peer links for communicating small amounts of information without affecting the quality of existing WWAN communications. In the wireless wide area network (WWAN) scenario, communication between mobile terminals is facilitated through uplink/downlink channels between the mobile terminals and a base station (i.e., WWAN link). Therefore, for various types of applications, an efficient means of communicating a small amount of information frequently is provided that does not require large amounts of signaling overhead. | 10-17-2013 |
20130303223 | METHODS AND APPARATUS FOR INDEX BASED PEER DISCOVERY - Base station assisted peer to peer discovery methods are described. A wireless terminal communicates peer discovery expression information to a base station and information identifying a peer discovery resource that it intends to use but which may also be used by other devices. The base station associates the peer discovery expression and peer discovery resource with an index value to be communicated on the peer discovery resource. The base station transmits the peer discovery expression and information associating the peer discovery expression with the peer discovery resource and the index value. The wireless terminal transmits the index value on the peer discovery resource. A wireless terminal receiving the index value determines the peer discovery expression being communicated using information from the base station. Use of different indexes allows multiple devices to use the same discovery resource. | 11-14-2013 |
20140051470 | METHODS AND APPARATUS FOR COMMUNICATING UPLINK DATA SIGNALS SIMULTANEOUSLY WITH DEVICE TO DEVICE DATA SIGNALS - A wireless communications device, e.g., a mobile wireless terminal, is controlled by a base station to simultaneously: (i) transmit uplink data signals in an uplink spectrum to a base station and (ii) transmit device to device data signals in the uplink spectrum to another wireless communications device. In various embodiments, the uplink data signals are communicated in a first multi-antenna stream corresponding to a first multi-antenna configuration and the device to device data signals are communicated in a second multi-antenna stream corresponding to a second multi-antenna configuration. Control information communicated from the base station to the wireless communications device being controlled include, e.g., a selected first antenna configuration for uplink data signaling, a selected second antenna configuration for device to device data signaling, a selected first maximum transmission power level for uplink data signaling and a selected second maximum transmission power level for device to device data signaling. | 02-20-2014 |
20140064147 | METHODS AND APPARATUS FOR WAN ENABLED PEER DISCOVERY - A method, an apparatus, and a computer program product for communication are provided in connection with WAN entity enabled discovery to for P2P communications. In one example, a WAN entity is equipped to obtain location information associated with a UE, allocate a peer discovery resource to the UE for use during peer discovery based at least in part on the obtained location information, and send a control message to the UE including the allocated peer discovery resource and one or more attributes associated with the peer discovery resource for use during peer discovery. In another example, a UE is equipped to send location information associated with a physical location of the UE to a WAN entity, receive a control message including a peer discovery resource and one or more attributes associated with the peer discovery resource, and use the peer discovery resource during peer discovery. | 03-06-2014 |
20140064163 | METHODS AND APPARATUS FOR PAGING BASED PEER DISCOVERY - A method, an apparatus, and a computer program product for wireless communication are provided in connection with LTE based paging for peer discovery. In one example, an eNodeB is equipped to receive a message including a D2D discovery notification for a UE, determine that the UE is in an idle mode, and transmit a paging notification to the UE including the D2D discovery notification. In another example, a UE is equipped to receive, from an eNodeB, a paging notification including a D2D discovery notification, determine, while in idle mode, that the D2D discovery notification is successfully decoded, and transmit an ACK to the eNodeB using a RACH sequence on a PRACH. | 03-06-2014 |
20140126432 | METHODS AND APPARATUS FOR ENABLING PEER-TO-PEER (P2P) COMMUNICATION IN LTE TIME DIVISION DUPLEX (TDD) SYSTEM - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives a configuration indicating multicast broadcast single frequency network (MBSFN) subframes within a radio frame. The configuration indicates a number of symbols of an MBSFN subframe for receiving a wide area network (WAN) control signal and remaining symbols of the MBSFN subframe dedicated for peer-to-peer communication. The apparatus communicates with a peer via the symbols dedicated for peer-to-peer communication. Alternatively, the apparatus receives a configuration indicating a portion at a beginning and/or end of a guard period of a special time division duplex (TDD) subframe. The portion is reserved for an uplink timing advance and/or switching from transmission to reception and/or reception to transmission. The configuration also indicates a remaining portion of the guard period of the special TDD subframe for peer-to-peer communication. The apparatus communicates with a peer via the remaining portion. | 05-08-2014 |
20140126437 | METHODS AND APPARATUS FOR COMMUNICATION MODE SELECTION BASED ON CONTENT TYPE - A method, an apparatus, and a computer program product for wireless communication are provided in connection with selection of a communication mode based on traffic type information. In one example, a network entity (e.g., a WiFi router, Picocell, Fentocell, an eNB, etc.) is equipped to obtain traffic type information for content to be transmitted by a network entity, determine a communication mode to use for transmission of the content based on the traffic type information, and transmit the content using the determined communication mode. In an aspect, the traffic type information may indicate that the content is a best effort traffic type, a latency sensitive traffic type, or no traffic type is available. | 05-08-2014 |
20140161095 | TRANSMISSION AND RECEPTION TIMING FOR DEVICE-TO-DEVICE COMMUNICATION SYSTEM EMBEDDED IN A CELLULAR SYSTEM - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus determines at least one time-frequency resource among resources of a cellular communication system to be used for device-to-device (D2D) communication, identifies a propagated start point of a first portion of the at least one time-frequency resource, and begins transmission of the D2D signal from a transmission start point. The transmission start point is based on the propagated start point and a cellular communication system downlink timing offset to the propagated start point. The apparatus also identifies a propagated end point of a last portion of the at least one time-frequency resource and ends transmission of the D2D signal at a transmission end point. The transmission end point is based on the propagated end point and a cellular communication system downlink timing advance to the propagated end point. | 06-12-2014 |
20140241219 | METHOD AND APPARATUS FOR COEXISTENCE OF PEER TO PEER COMMUNICATION WITH LTE WWAN COMMUNICATION ON DOWNLINK - A method, an apparatus, and a computer program product for wireless communication are provided. A UE for wireless communication determines resource elements, within at least one resource block in a downlink subframe, that carry reference signals from a base station. The UE maps at least one of data or control information to the at least one resource block, punctures the at least one of the data or the control information from the resource elements determined to carry the reference signals, and transmits the at least one resource block to a second UE. | 08-28-2014 |
20140301326 | METHODS AND APPARATUS FOR WAN ASSISTED CONTENTION DETECTION & RESOLUTION IN PEER TO PEER NETWORKS - Various methods and apparatus are directed to collision detection and/or avoidance regarding peer to peer connection identifiers. A wireless communications device broadcasts a signal indicating its acquired connection identifier in one of two alternative blocks. A base station monitors peer to peer signaling in its coverage area and tracks the usage of peer to peer connection identifiers by pairs of devices. The base station detects when multiple pairs of devices are using the same peer to peer connection identifier. The base station provides assistance to the peer to peer network to avoid a collision or facilitate rapid collision detection by the peer to peer devices. In one approach the base station sends an instruction for a connection to switch its connection identifier. In another approach the base station sends a connection a message to bias its selection as to which of the two alternative blocks to use for transmission. | 10-09-2014 |