Method and apparatus for control SL BSR based on different direct links in sidelink communication system
A method and apparatus for control SL BSR based on different direct links in sidelink communication system is provided. A first wireless device establishes a sidelink between a second wireless device. A first wireless device triggers a sidelink (SL) buffer status report (BSR) based on data available for transmission via the sidelink. A first wireless device detects a failure on the sidelink. A first wireless device cancels the triggered SL BSR based on the failure on the sidelink.
1. A method performed by a first wireless device in a wireless communication system, the method comprising,
receiving, from a network, a sidelink (SL) buffer status reporting (BSR) configuration;
triggering a first SL BSR, based on first SL data becoming available for a first logical channel related to a first destination, wherein the first logical channel is related to a first PC5-Radio Resource Control (RRC) connection between a pair of a source and the first destination;
triggering a second SL BSR, based on second SL data becoming available for a second logical channel related to a second destination, wherein the second logical channel is related to a second PC5-RRC connection between a pair of the source and the second destination;
detecting a failure on a sidelink associated with the first destination;
canceling one or more SL BSRs only associated with the first PC5-RRC connection based on the failure on the sidelink associated with the first destination, wherein the first SL BSR is included in the canceled one or more SL BSRs; and
transmitting, to the network, the second SL BSR based on that the second SL BSR has been triggered and not canceled.
2. The method of claim 1 , wherein the detecting a failure on the sidelink further comprises:
detecting that the sidelink associated with the first destination does not meet a quality of service (QoS) requirement.
3. The method of claim 2 , wherein the QoS requirement includes a target data rate, a target delay, a target communication range, and/or a target reliability.
4. The method of claim 1 , wherein the detecting the failure on the sidelink further comprises:
detecting that the sidelink associated with the first destination is released.
5. The method of claim 1 , wherein the detecting the failure on the sidelink further comprises:
receiving link failure information via the sidelink associated with the first destination.
6. The method of claim 5 , wherein the link failure information indicates radio link failure (RLF), retransmission failure, security failure, and/or reconfiguration failure based on transmission from the first wireless device.
7. The method of claim 1 , wherein the method further comprises:
triggering a scheduling request (SR) based on that an uplink (UL) grant for the second SL BSR is not available.
8. The method of claim 7 , wherein the method further comprises:
canceling the triggered SR based on detecting a failure on a sidelink associated with the second destination.
9. The method of claim 1 , wherein the method further comprises:
establishing the first PC5-RRC connection with a second wireless device.
10. The method of claim 1 , wherein the first wireless device is in communication with at least one of a user equipment, a network, or an autonomous vehicle other than the first wireless device.
11. The method of claim 9 , wherein the method further comprises:
establishing a second PC5-RRC connection with a third wireless device, wherein the second destination corresponds to the second PC5-RRC connection.
12. A first wireless device in a wireless communication system comprising: a transceiver; a memory; and at least one processor operatively coupled to the transceiver and the memory, and configured to:
receive, from a network, a sidelink (SL) buffer status reporting (BSR) configuration;
trigger a first SL BSR, based on first SL data becoming available for a first logical channel related to a first destination, wherein the first logical channel is related to a first PC5-Radio Resource Control (RRC) connection between a pair of a source and the first destination:
trigger a second SL BSR, based on second SL data becoming available for a second logical channel related to a second destination, wherein the second logical channel is related to a second PC5-RRC connection between a pair of the source and the second destination;
detect a failure on a sidelink associated with the first destination;
cancel one or more SL BSRs only associated with the first PC5-RRC connection based on the failure on the sidelink associated with the first destination, wherein the first SL BSR is included in the canceled one or more SL BSRs; and
transmit, to the network, the second SL BSR based on that the second SL BSR has been triggered and not canceled.
13. A non-transitory computer-readable medium having stored thereon a plurality of instructions, which, when executed by a processor of a wireless device, cause the wireless device to:
receive, from a network, a sidelink (SL) buffer status reporting (BSR) configuration;
trigger a first SL BSR, based on first SL data becoming available for a first logical channel related to a first destination, wherein the first logical channel is related to a first PC5-Radio Resource Control (RRC) connection between a pair of a source and the first destination;
trigger a second SL BSR, based on second SL data becoming available for a second logical channel related to a second destination, wherein the second logical channel is related to a second PC5-RRC connection between a pair of the source and the second destination;
detect a failure on a sidelink associated with the first destination;
cancel one or more SL BSRs only associated with the first PC5-RRC connection based on the failure on the sidelink associated with the first destination, wherein the first SL BSR is included in the canceled one or more SL BSRs; and
transmit, to the network, the second SL BSR based on that the second SL BSR has been triggered and not canceled.