Interdigital Patent Holdings, Inc.

Zhuorong Deng

Ravikumar V Pragada

Gregory S Sternberg

Balaji B Raghothaman

Kiran K Vanganuru

Pascal M Adjakple

Alexander Reznik

Saad Ahmad

Guanzhou Wang

Michael F Starsinic

Ulises Olvera-Hernandez

Eldad M Zeira

Samian Kaur

Juan Carlos Zuniga

Tao Deng

Diana Pani

Ghyslain Pelletier

Gwenael Poitau

Steven Ferrante

Hongsan Sheng

A method and apparatus are described for supporting a two-stage device-to-device (D2D) discovery using a D2D interworking function (IWF). A D2D IWF component may be configured to perform mapping between an application running on an application server and a third generation partnership project (3GPP) network, and provide a set of application programming interfaces (APIs) to allow discovery to be provided as a service to D2D applications. An application identifier may be mapped to a 3GPP identifier. Further, a method and apparatus are described for performing client-server discovery. A first wireless transmit/receive unit (WTRU) may be configured for a listen-only operation, and a second WTRU may be configured to transmit beacons. The first and second WTRUs may perform a radio access network (RAN) discovery procedure at an access stratum (AS) layer. A method and apparatus for performing charging for D2D service using a D2D IWF are also described.

Method and apparatus for supporting proximity discovery procedures

A wireless transmit/receive unit (WTRU) may receive from a network resource allocation information for device to device (D2D) communication. The WTRU may select, from the received resource allocation information for a transmission time interval (TTI), resources for a D2D channel. The WTRU may transmit, with use of the selected resources, data directly to another WTRU.

Resource allocation for device-to-device (D2D) communications

A method and apparatus for neighbor discovery in a wireless communication system are disclosed. A neighbor seeking wireless transmit/receive unit (WTRU) may search for a first signal to discover neighbor WTRUs for peer-to-peer communication. The WTRU may then receive the first signal. Further, the WTRU may generate a report based on the received first signal. Then, the WTRU may send a second signal carrying the report to a cellular wireless network. The first signal may include a beacon for neighbor discovery or a synchronization signal or both. The report may contain at least one neighbor WTRU identity or at least a portion of a time value or both. Further, the report may contain a counter value, including at least a portion of a time value. The counter value may be based on a time source. In addition, the first signal may be received from a synchronization source.

Method and apparatus for performing neighbor discovery

A wireless transmit/receive unit (WTRU) may receive discovery related configuration information that includes discovery filtering information and information for a non-long term evolution radio access technology (non-LTE RAT). The WTRU may monitor a device to device (D2D) communication interface on the non-LTE RAT based on the discovery filtering information and send a report that includes information associated with the discovery filtering information. The WTRU may receive a message to allow the WTRU to establish a D2D communication link with another WTRU using the non-LTE RAT.

Method and apparatus for device-to-device (D2D) mobility in wireless systems

A dual-radio access technology (dual-RAT) wireless transmit/receive unit (WTRU) may transmit, over a cellular RAT, a registration message that includes a wireless local area network (WLAN) device identifier (ID) for a WLAN associated with the dual-RAT WTRU. A transceiver of the dual-RAT WTRU may receive, from the cellular network over the cellular RAT, assistance information that includes a security key for the WLAN. A processor of the dual-RAT WTRU may perform, over a WLAN RAT, device-to-device D2D direct discovery using the WLAN device ID and the security key for the WLAN.

Registration for device-to-device (D2D) communications

A method and apparatus for neighbor discovery in a wireless communication system are disclosed. A neighbor seeking wireless transmit/receive unit (WTRU) may send a first beacon based on configuration information provided by the network. The neighbor WTRUs receive the first beacon and may send either a report to the network or send a second beacon to the neighbor seeking WTRU. The network may then provide neighbor WTRU information to the neighbor seeking WTRU. The neighbor discovery may be performed within a pre-defined group of WTRUs that is formed based on proximity to the WTRU and/or an attribute of the WTRU. The neighbor discovery procedure may be performed to find neighbor WTRUs in case where a WTRU fails to find any network. A neighbor list may be generated by the neighbor seeking WTRU by measuring reference signals transmitted by neighbor WTRUs on an uplink to the network.

A method and apparatus for cross link (XL) establishment are disclosed. In the method and apparatus, a XL between a terminal wireless transmit/receive unit (T-WTRU) and a helper WTRU (H-WTRU) is established. The T-WTRU and the H-WTRU may be configured to operate in a plurality of RRC states and a plurality of RRC substates. To establish the XL, neighbor discovery, association information exchange, and a H-WTRU selection may be performed. Radio resource control (RRC) configuration of the T-WTRU and the H-WTRU may also be performed. In the method and apparatus, coverage for a T-WTRU may be handed over between a network and a H-WTRU or between two H-WTRUs.

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Brooklyn, NY, United States of America

Zhuorong Deng