Title:
ON-DEMAND RELAYING OF MESSAGES FOR SIDE-LINK COMMUNICATIONS
Document Type and Number:
WIPO Patent Application WO/2020/205209
Kind Code:
A3
Abstract:
Methods, systems, and devices for wireless communications are described. In some systems (e.g., vehicle-to-everything (V2X) systems), a source user equipment (UE) may multicast a data packet to surrounding UEs. In some cases, a receiving UE may fail to receive the transmission due to blocking, shadowing, or interference. The receiving UE may multicast a message requesting retransmission of the packet. Any surrounding UEs that successfully received the data packet from the source UE and the relay request message from the receiving UE may determine whether to relay the packet. Determining whether to relay the packet may be based on a reference signal received power (RSRP) threshold, available resources, a distance to the blocked UE, or some combination thereof. In some examples, the receiving UE may successfully receive the relayed packet from the relay UE even if a path between the receiving UE and the original source UE is blocked.
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Inventors:
NGUYEN TIEN VIET (US)
BAGHEL SUDHIR KUMAR (US)
GULATI KAPIL (US)
BHARADWAJ ARJUN (US)
BAGHEL SUDHIR KUMAR (US)
GULATI KAPIL (US)
BHARADWAJ ARJUN (US)
Application Number:
PCT/US2020/022769
Publication Date:
November 19, 2020
Filing Date:
March 13, 2020
Export Citation:
Assignee:
QUALCOMM INC (US)
International Classes:
H04L1/18
Domestic Patent References:
| WO2018031526A1 | 2018-02-15 |
Other References:
TCL COMMUNICATION: "Resource allocation for NR sidelink Mode 2", vol. RAN WG1, no. Xi'An, China; 20190408 - 20190412, 2 April 2019 (2019-04-02), XP051707318, Retrieved from the Internet [retrieved on 20190402]
HUAWEI ET AL: "Sidelink physical layer procedures for NR V2X", vol. RAN WG1, no. Xi'an, China; 20190408 - 20190412, 2 April 2019 (2019-04-02), XP051707059, Retrieved from the Internet [retrieved on 20190402]
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XIAOMI COMMUNICATIONS: "On Physical layer procedures for V2x communications", vol. RAN WG1, no. Taipei; 20190121 - 20190125, 20 January 2019 (2019-01-20), XP051593862, Retrieved from the Internet [retrieved on 20190120]
HUAWEI ET AL: "Sidelink physical layer procedures for NR V2X", vol. RAN WG1, no. Xi'an, China; 20190408 - 20190412, 2 April 2019 (2019-04-02), XP051707059, Retrieved from the Internet
XIAOMI COMMUNICATIONS: "On support of HARQ for V2x communications", vol. RAN WG1, no. Chengdu, China; 20181008 - 20181012, 28 September 2018 (2018-09-28), XP051518824, Retrieved from the Internet
XIAOMI COMMUNICATIONS: "On Physical layer procedures for V2x communications", vol. RAN WG1, no. Taipei; 20190121 - 20190125, 20 January 2019 (2019-01-20), XP051593862, Retrieved from the Internet
Attorney, Agent or Firm:
KARREN, J. Scott (US)
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