Supporting inter-media synchronization in wireless communications
Various embodiments provide systems and methods for supporting synchronized delivery of packets of different type media streams of a service. Various embodiments enable wireless device and/or network assistance of packet synchronization in downlink (DL) and/or uplink (UL) transmissions.
1. A method for synchronizing delivery of a multimedia service among different media streams performed by a processor of a base station, comprising:
receiving a buffer status report for each of different type media streams of the multimedia service from a wireless device, wherein the buffer status reports indicate different logical channel groups and different priorities for each different type media stream;
allocating uplink (UL) grants for each different type media stream of the multimedia service based on the buffer status reports, wherein the allocated UL grants include a periodic configured grant (CG) offset based on skew of two or more packets between the different type media streams, and wherein the different type media streams include a payload configured to align the CG offset with the skew; and
indicating the allocated UL grant for each different type media stream of the multimedia service to the wireless device over a Physical Downlink Control Channel (PDCCH).
2. The method of claim 1 , further comprising:
receiving a scheduling request (SR) from the wireless device indicating a remaining latency budget for one of the different type media streams of the multimedia service over a Physical Uplink Control Channel (PUCCH);
allocating UL grants for the one of the different type media streams of the multimedia service based on the remaining latency budget in response to receiving the SR;
indicating the allocated UL grant for the one of the different type media streams of the multimedia service to the wireless device over the PDCCH; and
receiving UL data from for the one of the different type media streams of the multimedia service from the wireless device over a Physical Uplink Shared Channel (PUSCH).
3. The method of claim 2 , wherein the remaining latency budget is a remaining packet delay budget.
4. The method of claim 2 , wherein the remaining latency budget is a remaining end-to-end (e2e) latency budget.
5. A base station, comprising:
a processor configured with processor-executable instructions to:
receive a buffer status report for each of different type media stream of a multimedia service from a wireless device, wherein the buffer status reports indicate different logical channel groups and different priorities for each different type media stream;
allocate uplink (UL) grants for each different type media stream of the multimedia service based on the buffer status reports, wherein the allocated UL grants include a periodic configured grant (CG) offset based on skew of two or more packets between the different type media streams, and wherein the different type media streams include a payload configured to align the CG offset with the skew; and
indicate the allocated UL grant for each different type media stream of the multimedia service to the wireless device over a Physical Downlink Control Channel (PDCCH).
6. The base station of claim 5 , wherein the processor is further configured with processor-executable instructions to:
receive a scheduling request (SR) from the wireless device indicating a remaining latency budget for one of the different type media streams of the multimedia service over a Physical Uplink Control Channel (PUCCH);
allocate UL grants for the one of the different type media streams of the multimedia service based on the remaining latency budget in response to receiving the SR;
indicate the allocated UL grant for the one of the different type media streams of the multimedia service to the wireless device over the PDCCH; and
receive UL data from for the one of the different type media streams of the multimedia service from the wireless device over a Physical Uplink Shared Channel (PUSCH).
7. The base station of claim 6 , wherein the remaining latency budget is a remaining packet delay budget.
8. The base station of claim 6 , wherein the remaining latency budget is a remaining end-to-end (e2e) latency budget.