Sounding reference signal (SRS) mechanism for intracell device-to-device (D2D) communication
First Claim
1. A user equipment (UE) configured for device discovery via a node using a device-to-device (D2D) sounding reference signal (SRS), the UE comprising:
- one or more antennas; and
a transceiver module configured to;
send a radio resource control (RRC) device discovery request to a node via the one or more antennas,scan D2D SRS subframes of proximity UEs using D2D SRS triggering, wherein a proximity UE is located within a same cell as the UE, andsend feedback to the node of detected D2D SRS information of the proximity UEs via the one or more antennas, wherein the transceiver module comprises code that is located in one or more digital memory devices to be executed by one or more processors or the transceiver module is implemented in a hardware circuit.
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Abstract
Technology for device discovery using a device-to-device (D2D) sounding reference signal (SRS) and device discovery using D2D SRS in a channel measurement group (CMG) is disclosed. In an example, a user equipment (UE) configured for device discovery via a node using the D2D SRS can include a transceiver module. The transceiver module can send a radio resource control (RRC) device discovery request to a node, scan D2D SRS subframes of proximity UEs using D2D SRS triggering, and send feedback to the node of detected D2D SRS information of the proximity UEs. The proximity UE can be located within a same cell as the UE.
48 Citations
41 Claims
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1. A user equipment (UE) configured for device discovery via a node using a device-to-device (D2D) sounding reference signal (SRS), the UE comprising:
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one or more antennas; and a transceiver module configured to; send a radio resource control (RRC) device discovery request to a node via the one or more antennas, scan D2D SRS subframes of proximity UEs using D2D SRS triggering, wherein a proximity UE is located within a same cell as the UE, and send feedback to the node of detected D2D SRS information of the proximity UEs via the one or more antennas, wherein the transceiver module comprises code that is located in one or more digital memory devices to be executed by one or more processors or the transceiver module is implemented in a hardware circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for device discovery using a device-to-device (D2D) sounding reference signal (SRS), the method comprising:
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receiving D2D SRS configuration information from an evolved Node B (eNB) at a user equipment (UE); sending UE capability information to the eNB; receiving D2D SRS resources allocation information from the eNB; scanning configured D2D SRS resources at the UE based on the D2D SRS resources allocation information; and sending feedback of detected D2D SRS resources to the eNB. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. At least one non-transitory machine readable storage medium storing a plurality of computer executable instructions which when executed by one or more processors perform the following:
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receiving D2D SRS configuration information from an evolved Node B (eNB) at a user equipment (UE); sending UE capability information to the eNB; receiving D2D SRS resources allocation information from the eNB; scanning configured D2D SRS resources at the UE based on the D2D SRS resources allocation information; and sending feedback of detected D2D SRS resources to the eNB.
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29. A user equipment (UE) in a channel measurement group (CMG) operable for device discovery using a device-to-device (D2D) sounding reference signal (SRS), the UE comprising:
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one or more antennas; a transceiver module configured to; receive a CMG request message including a CMG identifier (CMGID) from an evolved Node B (eNB) via the one or more antennas, and send a CMG response message including the CMGID to the eNB based on the CMG request message via the one or more antennas, wherein the transceiver module comprises code that is located in one or more digital memory devices to be executed by one or more processors or the transceiver module is implemented in a first hardware circuit; and a processing module configured to; receive D2D SRS configuration information for the CMG from the eNB via the one or more antennas; measure a signal strength or a signal quality of a D2D SRS based on the D2D SRS configuration information; generate a channel status report for a D2D link between a UE pair based on a measurement of the D2D SRS, wherein the UE pair includes the UE and another UE in the CMG; and send the channel status report to the eNB via the one or more antennas, wherein the processing module comprises code that is located in the one or more digital memory devices to be executed by the one or more processors or the processing module is implemented in a second hardware circuit. - View Dependent Claims (30, 31, 32, 33, 34)
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35. A node for device discovery using a device-to-device (D2D) sounding reference signal (SRS) in a channel measurement group (CMG) including a plurality of user equipments (UEs), the node comprising:
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one or more antennas; a processing module configured to; generate a CMG identifier (CMGID) for a CMG, and determine a UE pair available for D2D communication by calculating a channel pathloss in a D2D link between the UE pair from a channel status report, wherein the processing module comprises code that is located in one or more digital memory devices to be executed by one or more processors or the processing module is implemented in a first hardware circuit; and a transceiver module configured to; transmit D2D SRS configuration information to the UEs in the CMG via the one or more antennas to measure a D2D SRS, and receive the channel status report via the one or more antennas based on measurements of a D2D SRS, wherein the transceiver module comprises code that is located in the one or more digital memory devices to be executed by the one or more processors or the transceiver module is implemented in a second hardware circuit. - View Dependent Claims (36, 37, 38, 39, 40, 41)
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Specification