JPWO2020198586A5

JPWO2020198586A5 -

Info

Publication number: JPWO2020198586A5
Application number: JP2021557384A
Authority: JP
Publication date: 2022-08-10
Anticipated expiration: 2040-03-27

Claims

A first device comprising a processor, non-transitory memory, and communication circuitry, and operably connected by the communication circuitry to a second device via one or more wireless sidelinks, the first device being executed by the processor; If
receiving from a third device one or more configuration parameters associated with sidelink radio link monitoring (SL-RLM) between the first device and the second device;
monitoring one of the radio sidelinks between the first device and the second device to determine SL radio link failure (SL-RLF);
determining an SL-RLF between the first device and the second device based on the received one or more configuration parameters, the SL-RLF being the first device and the second device; associated with a monitored wireless sidelink to and from the device;
releasing the failed radio link based on the determined SL-RLF;
in the non-transitory memory instructions that cause the first device to perform a process comprising:

Monitoring one of the radio sidelinks and determining the SL-RLF is further based on a trigger, the trigger being a monitored signal between the first device and the second device. 2. The first apparatus of claim 1, comprising criteria associated with communication over a radio sidelink and associated with hybrid automatic repeat request (HARQ) feedback.

3. The first apparatus of claim 2, wherein the criteria associated with HARQ feedback includes one or more of a number of missed HARQ feedbacks exceeding a threshold and a number of HARQ-NACKs exceeding a threshold.

monitoring one of the wireless sidelinks and determining the SL-RLF further maps communication over the monitored wireless sidelink between the first device and the second device. based on one or more triggers obtained by:
Criteria mapped to HARQ feedback over a monitored radio sidelink between the first device and the second device;
criteria associated with radio signal measurements of monitored radio sidelinks between the first device and the second device;
criteria associated with indications of synchronous or asynchronous monitored radio sidelinks between said first device and said second device;
criteria associated with a maximum number of Radio Link Control (RLC) retransmissions over a monitored radio sidelink between the first device and the second device;
criteria associated with expiration of a Packet Data Convergence Protocol (PDCP) reordering timer;
a criterion associated with the number of random access preamble transmissions from the first device to the second device;
a reference associated with a physical location or distance between said first device and said second device; or
Criteria for linking a monitored wireless sidelink between the first device and the second device to another sidelink, the another sidelink being a wireless sidelink between the first device and the second device. or a side link between said first device and a fourth device, or a side link between a fourth device and a fifth device
2. The first device of claim 1, comprising:

2. The first device of claim 1, wherein said first device notifies said SL-RLF to said third device.

6. The first device of claim 5, wherein said SL-RLF notification to said third device includes identification information of said second device.

2. The first device of claim 1, wherein the first device is a user terminal, the second device is a user terminal, and the third device is a base station, a roadside unit (RSU) or a user terminal.

The processor further executes instructions to receive communications from the second device, the communications including one or more of HARQ feedback, RLC feedback, reference signals, user data, keep-alive messages, or dummy data. A first device according to claim 1 .

2. The method of claim 1, wherein monitoring one of said radio sidelinks, determining said SL-RLF and releasing said failed radio link are performed by Radio Resource Control (RRC). First device.

5. The first apparatus of claim 4, wherein the Radio Link Control (RLC) sends an indication to the Radio Resource Control (RRC) that the maximum number of retransmissions has been reached.

5. The first apparatus of claim 4, wherein a medium access control (MAC) sends an indication to the RRC entity that the maximum number of missing HARQ feedbacks for a particular destination has been reached.

5. The first device of claim 4, wherein the physical layer (PHY) sends an indication of synchronous or asynchronous to the RRC.

5. The first device of claim 4, wherein the fourth device is a relay UE and the fifth device is a base station or another UE.

in a first device operatively connected to a second device via one or more sidelinks, sidelink radio link monitoring (SL-RLM) between said first device and said second device; receiving one or more associated configuration parameters from a third device;
monitoring one of the wireless sidelinks between the first device and the second device;
determining an SL radio link failure (SL-RLF) between the first device and the second device based on the received one or more configuration parameters, wherein the SL-RLF is the first associated with a monitored wireless sidelink between one device and the second device;
releasing the failed radio sidelink based on the determined SL-RLF;
method including.

Monitoring one of the radio sidelinks and determining the SL-RLF is further based on a trigger, the trigger being a monitored signal between the first device and the second device. 15. The method of claim 14, comprising criteria associated with communication over a radio sidelink and associated with hybrid automatic repeat request (HARQ) feedback.

16. The method of claim 15, wherein the criteria associated with HARQ feedback includes one or more of the number of missed HARQ feedbacks above a threshold and the number of HARQ-NACKs above a threshold.

15. The method of claim 14, wherein said first device notifies said SL-RLF to said third device.

18. The method of claim 17, wherein the SL-RLF notification to the third device includes identification information of the second device.

The method further includes receiving communications from the second device, the communications including one or more of HARQ feedback, RLC feedback, reference signals, user data, keep-alive messages, or dummy data. Item 15. The method according to Item 14.

15. The method of claim 14, wherein monitoring one of said radio sidelinks, determining said SL-RLF and releasing said failed radio link are performed by Radio Resource Control (RRC). Method.