Techniques for identifying falsely triggered semi-persistent scheduling grant in frequency division duplexing traffic associated with transmission time interval bundling
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive first configuration information indicating a transmission time interval (TTI) bundling resource. The UE may receive second configuration information indicating semi-persistent scheduling (SPS) resources. The UE may detect, during a communication session, an SPS trigger for using the SPS resources in a subframe that is misaligned with a periodicity associated with the TTI bundling resource. The UE may determine whether the SPS trigger is valid based at least in part on a number of TTI bundling grants subsequent to the detection of the SPS trigger that are misaligned with the subframe associated with the SPS trigger. Numerous other aspects are provided.
1 . A method of wireless communication performed by a user equipment (UE), comprising:
receiving first configuration information indicating a transmission time interval (TTI) bundling resource;
receiving second configuration information indicating semi-persistent scheduling (SPS) resources;
detecting, during a communication session, an SPS trigger for using the SPS resources in a subframe, wherein the subframe is misaligned with a periodicity associated with the TTI bundling resource; and
determining whether the SPS trigger is valid based at least in part on a proportion of a number of TTI bundling grants subsequent to the detection of the SPS trigger that are misaligned with the subframe associated with the SPS trigger, out of a threshold number of TTI bundling grants subsequent to the detection of the SPS trigger, satisfying a threshold.
2 . The method of claim 1 , further comprising:
reverting to a transmission schedule that is based at least in part on a grant time associated with a most recent TTI bundling grant prior to the SPS trigger based at least in part on the determination that the SPS trigger is invalid.
3 . The method of claim 1 , wherein determining whether the SPS trigger is valid includes:
determining that the SPS trigger is valid based at least in part on the proportion of the number of TTI bundling grants that are misaligned with the subframe associated with the SPS trigger, out of the threshold number of TTI bundling grants subsequent to the detection of the SPS trigger, failing to satisfy the threshold.
4 . The method of claim 3 , further comprising:
maintaining a transmission schedule that is based at least in part on the subframe associated with the SPS trigger based at least in part on the determination that the SPS trigger is valid.
5 . The method of claim 1 , wherein each of the TTI bundling grants is addressed to a cell radio network temporary identity assigned to the UE for TTI bundling.
6 . The method of claim 1 , wherein the SPS trigger is detected based at least in part on an erroneous downlink control channel decoding result.
7 . The method of claim 1 , wherein the SPS trigger is detected based at least in part on a downlink control channel message, received from a base station, erroneously triggering use of the SPS resources in the subframe that is misaligned with the periodicity associated with the TTI bundling resource.
8 . The method of claim 1 , wherein the periodicity associated with the TTI bundling is based at least in part on a TTI bundle size.
9 . The method of claim 8 , wherein the TTI bundle size is four.
10 . The method of claim 1 , wherein the communication session includes traffic associated with a Voice over Long Term Evolution (VOLTE) call.
11 . A user equipment (UE) for wireless communication, comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to:
receive first configuration information indicating a transmission time interval (TTI) bundling resource;
receive second configuration information indicating semi-persistent scheduling (SPS) resources;
detect, during a communication session, an SPS trigger for using the SPS resources in a subframe, wherein the subframe is misaligned with a periodicity associated with the TTI bundling resource; and
determine whether the SPS trigger is valid based at least in part on a proportion of a number of TTI bundling grants subsequent to the detection of the SPS trigger that are misaligned with the subframe associated with the SPS trigger, out of a threshold number of TTI bundling grants subsequent to the detection of the SPS trigger, satisfying a threshold.
12 . The UE of claim 11 , wherein the one or more processors are further configured to:
revert to a transmission schedule that is based at least in part on a grant time associated with a most recent TTI bundling grant prior to the SPS trigger based at least in part on the determination that the SPS trigger is invalid.
13 . The UE of claim 11 , wherein the one or more processors, to determine whether the SPS trigger is valid, are configured to:
determine that the SPS trigger is valid based at least in part on the proportion of the number of TTI bundling grants that are misaligned with the subframe associated with the SPS trigger, out of the threshold number of TTI bundling grants subsequent to the detection of the SPS trigger, failing to satisfy the threshold.
14 . The UE of claim 13 , wherein the one or more processors are further configured to:
maintain a transmission schedule that is based at least in part on the subframe associated with the SPS trigger based at least in part on the determination that the SPS trigger is valid.
15 . The UE of claim 11 , wherein each of the TTI bundling grants is addressed to a cell radio network temporary identity assigned to the UE for TTI bundling.
16 . The UE of claim 11 , wherein the SPS trigger is detected based at least in part on an erroneous downlink control channel decoding result.
17 . The UE of claim 11 , wherein the SPS trigger is detected based at least in part on a downlink control channel message, received from a base station, erroneously triggering use of the SPS resources in the subframe that is misaligned with the periodicity associated with the TTI bundling resource.
18 . The UE of claim 11 , wherein the periodicity associated with the TTI bundling is based at least in part on a TTI bundle size.
19 . The UE of claim 18 , wherein the TTI bundle size is four.
20 . The UE of claim 11 , wherein the communication session includes traffic associated with a Voice over Long Term Evolution (VOLTE) call.
21 . A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:
one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to:
receive first configuration information indicating a transmission time interval (TTI) bundling resource;
receive second configuration information indicating semi-persistent scheduling (SPS) resources;
detect, during a communication session, an SPS trigger for using the SPS resources in a subframe, wherein the subframe is misaligned with a periodicity associated with the TTI bundling resource; and
determine whether the SPS trigger is valid based at least in part on a proportion of a number of TTI bundling grants subsequent to the detection of the SPS trigger that are misaligned with the subframe associated with the SPS trigger, out of a threshold number of TTI bundling grants subsequent to the detection of the SPS trigger, satisfying a threshold.
22 . The non-transitory computer-readable medium of claim 21 , wherein the one or more instructions, that cause the UE to determine whether the SPS trigger is valid, cause the UE to:
determine that the SPS trigger is valid based at least in part on the proportion of the number of TTI bundling grants that are misaligned with the subframe associated with the SPS trigger, out of the threshold number of TTI bundling grants subsequent to the detection of the SPS trigger, failing to satisfy the threshold.
23 . The non-transitory computer-readable medium of claim 21 , wherein the SPS trigger is detected based at least in part on an erroneous downlink control channel decoding result or based at least in part on a downlink control channel message, received from a base station, erroneously triggering use of the SPS resources in the subframe that is misaligned with the periodicity associated with the TTI bundling resource.
24 . An apparatus for wireless communication, comprising:
means for receiving first configuration information indicating a transmission time interval (TTI) bundling resource;
means for receiving second configuration information indicating semi-persistent scheduling (SPS) resources;
means for detecting, during a communication session, an SPS trigger for using the SPS resources in a subframe, wherein the subframe is misaligned with a periodicity associated with the TTI bundling resource; and
means for determining whether the SPS trigger is valid based at least in part on a proportion of a number of TTI bundling grants subsequent to the detection of the SPS trigger that are misaligned with the subframe associated with the SPS trigger, out of a threshold number of TTI bundling grants subsequent to the detection of the SPS trigger, satisfying a threshold.
25 . The apparatus of claim 24 , wherein the means for determining whether the SPS trigger is valid includes:
means for determining that the SPS trigger is valid based at least in part on the proportion of the number of TTI bundling grants that are misaligned with the subframe associated with the SPS trigger, out of the threshold number of TTI bundling grants subsequent to the detection of the SPS trigger, failing to satisfy the threshold.
26 . The apparatus of claim 24 , wherein the SPS trigger is detected based at least in part on an erroneous downlink control channel decoding result or based at least in part on a downlink control channel message, received from a base station, erroneously triggering use of the SPS resources in the subframe that is misaligned with the periodicity associated with the TTI bundling resource.