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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4G | 25/09/2014 | ISLD-201409-028 | INTERDIGITAL INC |
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4G | 30/12/2019 | ISLD-201912-087 | INTERDIGITAL INC |
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5G | 14/12/2020 | ISLD-202012-039 | INTERDIGITAL INC |
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5G | 29/09/2021 | ISLD-202109-030 | INTERDIGITAL INC |
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Specification Information
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WO2014113537A1 | 4G | 25/09/2014 | ISLD-201409-028 | INTERDIGITAL INC |
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WO2014113537A1 | 4G | 30/12/2019 | ISLD-201912-087 | INTERDIGITAL INC |
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CN104938021A | 4G | 25/09/2014 | ISLD-201409-028 | INTERDIGITAL INC |
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CN104938021A | 4G | 30/12/2019 | ISLD-201912-087 | INTERDIGITAL INC |
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EP3709730A1 | 5G | 14/12/2020 | ISLD-202012-039 | INTERDIGITAL INC |
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US2021084482A1 | ----- | ----- | ----- | ----- | ----- | ----- | ----- |
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Technologies
Product
Use Cases
Services
Claim
1-21. (canceled)
22. A method associated with a device to device (D2D) transmission by a wireless transmit/receive device (WTRU), the method comprising:
receiving a D2D transmission configuration from a network via a system information block (SIB) or via dedicated signaling, wherein the D2D transmission configuration indicates D2D resources for transmission on a D2D channel; randomly selecting a D2D transmission resource based on the received D2D transmission configuration; determining transmit power of the D2D transmission based on an estimated path loss to a serving cell; determining a D2D transmission frame timing, wherein the D2D transmission frame timing is determined using a downlink (DL) radio frame of the serving cell as a reference; and transmitting the D2D transmission based on the randomly selected D2D transmission resource in accordance with the determined transmit power of the D2D transmission and the D2D transmission frame timing, wherein the D2D transmission includes a guard period.
23. The method of claim 22, wherein the D2D transmission configuration comprises a resource offset indicating offset of the D2D transmission resource, wherein the resource offset depends on a system frame number (SFN) and a subframe number.
24. The method of claim 23, wherein the D2D transmission configuration further comprises a bitmap of a D2D resource occasion, and size as a number of physical resource blocks (PRBs).
25. The method of claim 22, wherein the D2D transmission resource is randomly selected from the available D2D resources for transmission on the D2D channel.
26. The method of claim 22, wherein the serving cell used to estimate path loss is configured via radio resource control (RRC) signaling.
27. The method of claim 22 further comprising receiving, via radio resource control (RRC) signaling, a configuration for path loss compensation.
28. The method of claim 27, wherein the transmit power of the D2D transmission is further determined using the configuration for path loss compensation.
29. The method of claim 22, wherein the guard period occupies the last symbol in a sidelink subframe carrying the D2D transmission.
30. A wireless transmit/receive device (WTRU) comprising:
a processor configured to at least:
receive a D2D transmission configuration from a network via a system information block (SIB) or via dedicated signaling, wherein the D2D transmission configuration indicates D2D resources for transmission on a D2D channel;
randomly select a D2D transmission resource based on the received D2D transmission configuration;
determine transmit power of the D2D transmission based on an estimated path loss to a serving cell;
determine a D2D transmission frame timing, wherein the D2D transmission frame timing is determined using a downlink (DL) radio frame of the serving cell as a reference; and
transmit the D2D transmission based on the randomly selected D2D transmission resource in accordance with the determined transmit power of the D2D transmission and the D2D transmission frame timing, wherein the D2D transmission includes a guard period.
31. The WTRU of claim 30, wherein the D2D transmission configuration comprises a resource offset indicating offset of the D2D transmission resource, wherein the resource offset depends on a system frame number (SFN) and a subframe number.
32. The WTRU of claim 31, wherein the D2D transmission configuration further comprises a bitmap of a D2D resource occasion, and size as a number of physical resource blocks (PRBs).
33. The WTRU of claim 30, wherein the D2D transmission resource is randomly selected from the available D2D resources for transmission on the D2D channel.
34. The WTRU of claim 30, wherein the serving cell used to estimate path loss is configured via radio resource control (RRC) signaling.
35. The WTRU of claim 30, wherein the processor is configured to receive, via radio resource control (RRC) signaling, a configuration for path loss compensation.
36. The WTRU of claim 35, wherein the transmit power of the D2D transmission is further determined using the configuration for path loss compensation.
37. The WTRU of claim 30, wherein the guard period occupies the last symbol in a sidelink subframe carrying the D2D transmission.
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
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