DISCOVERY SIGNAL GENERATION AND RECEPTION
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Accused Products
Abstract
Physical layer processing and procedures for device-to-device (D2D) discovery signal generation and transmission and scheduling of D2D discovery signals are described. Detection and measurement of a D2D discovery signal, D2D signal identity management, and monitoring by a wireless transmit/receive unit (WTRU) of PDCCH for D2D discovery scheduling is described, as is a WTRU that may be configured with a D2D-specific transmission/reception opportunity pattern. The discovery signal may carry a payload for explicit information about user and/or service identity, and may be mapped to physical resources in such a way as to decouple transmission/reception of the discovery signal from downlink operations. A WTRU may measure a D2D discovery signal quality and report to the network.
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Citations
41 Claims
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1-21. -21. (canceled)
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22. A method associated with device to device (D2D) signaling by a wireless transmit/receive device (WTRU), comprising:
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determining a D2D discovery signal schedule indicating allowed subframes to transmit a D2D discovery signal; determining a scrambling sequence, wherein the scrambling sequence is fixed; determining to transmit the D2D discovery signal on one or more of the allowed subframes; and transmitting the D2D discovery signal using the scrambling sequence, wherein the D2D discovery signal comprises a payload and a guard period. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A wireless transmit/receive device (WTRU) comprising:
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a processor configured to at least; determine a device to device (D2D) discovery signal schedule indicating allowed subframes to transmit a D2D discovery signal; determine a scrambling sequence, wherein the scrambling sequence is fixed; determine to transmit the D2D discovery signal on one or more of the allowed subframes; and a transmitter configured to at least; transmit the D2D discovery signal using the scrambling sequence, wherein the D2D discovery signal comprises a payload and a guard period. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41)
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Specification