Interdigital Patent Holdings, Inc.

Chao-Cheng Tu

Benoit Pelletier

Paul Marinier

Marian Rudolf

Diana Pani

Ghyslain Pelletier

Gwenael Poitau

Joseph S Levy

Lujing Cai

Damian C Hamme

Systems, methods, and instrumentalities are provided to implement scheduling for device-to-device (D2D). A WTRU (e.g., a D2D WTRU) may determine whether the WTRU has D2D data to transmit. The WTRU may determine a set of allowed SA resources and/or allowed D2D data resources for transmission of the SA. The WTRU may select an SA resource and/or D2D data resources (e.g., from the set of allowed SA resources and/or D2D data resources) for transmission. The WTRU may select one or more transmission parameters. The WTRU may select one or more transmission patterns. The WTRU may transmit D2D data over the set of allowed D2D resources using the selected transmission patterns and according to the selected transmission parameters.

Distributed scheduling for device-to-device communication

Embodiments include methods, systems, and apparatuses for a first wireless transmit/receive unit (WTRU) to perform device-to-device (D2D) communication directly with a second WTRU is disclosed. The embodiments may include determining a base pattern length to use for the D2D communication based on at least a transmission configuration. A base pattern may be selected from one or more base patterns having the determined base pattern length based on an indication from a network. The selected base pattern may have one or more transmission opportunities. One or more data packets may be transmitted to the second WTRU in at least one of the one or more transmission opportunities of the selected base pattern.

Methods and apparatus for determining device-to-device transmission patterns

Embodiments include methods and apparatuses for the design, construction and selection of base patterns and associated control signaling for direct device-to-device (D2D) communication, independent of a network. An embodiment includes the selection and transmission, by a wireless transmit and receive unit (WTRU), of base patterns in a scheduling period when the number of medium access control (MAC) protocol data units (PDUs) is larger than the number of MAC PDUs that a family of pre-determined base patterns can support. An embodiment may include the selection and transmission, by a WTRU, of base patterns in a scheduling period when the number of MAC PDUs is smaller than the number of MAC PDUs that a family of pre-determined base patterns can support. In addition, embodiments may include the selection, by a WTRU, of a base pattern or base patterns to minimize interference with other communications and to use resources efficiently.

Systems, methods, and instrumentalities are disclosed for a wireless transmit/receive unit (WTRU) to determine rank, offset, or inter-stream interference control information, for example, which may be associated with uplink MIMO operations. A method to control a WTRU may include receiving a special E-RNTI that is associated with a channel. The channel may be associated with a rank indication. The channel may be an E-AGCH-like channel. The channel may have a similar encoding structure as an E-AGCH. The channel may be an E-ROCH. The channel may be received, and it may be determined that the channel is associated with the special E-RNTI. At least one of a rank or an offset may be determined, and the WTRU may be configured with the determined rank or offset. An inter-stream interference (ISI) offset may be received, for example, via RRC signaling, and may be applied to an uplink transmission of a primary stream.

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Brossard, Canada

Chao-Cheng Tu