Systems, methods, and devices for ultra-reliable low latency communication quality-of-service guarantee
A method for packet data convergence protocol (PDCP) protocol data unit (PDU) duplication and transport block (TB) repetition is provided. The method includes providing a radio access network (RAN) configuration having at least one of a PDCP PDU duplication configuration or a TB repetition configuration, performing at least one of PDCP PDU duplication or TB repetition based on one or more triggering events in the RAN configuration, where the PDCP PDU duplication includes providing at least one duplicated PDCP PDU to a radio link control (RLC) bearer.
1. A method for packet data convergence protocol (PDCP) protocol data unit (PDU) duplication for a radio bearer of a user equipment (UE), the method comprising:
receiving, from a serving radio access network (RAN), through radio resource control (RRC) signaling, a PDCP PDU duplication configuration and a first bitmap, the PDCP PDU duplication configuration for configuring at least two split bearers associated with a cell group, each split bearer having a one-on-one relationship with one radio link control (RLC) entity of the UE, each bit in the first bitmap for indicating whether a corresponding one of the at least two split bearers is active or inactive for transmitting duplicated PDCP PDUs to the serving RAN; and
receiving, from the serving RAN, a medium access control (MAC) control element (CE) for reconfiguring the at least two split bearers, the MAC CE comprising a second bitmap, each bit in the second bitmap also for indicating whether a corresponding one of the at least two split bearers is active or inactive for transmitting the duplicated PDCP PDUs to the serving RAN.
2. The method of claim 1 , wherein the cell group comprises one of a master cell group (MCG) and a secondary cell group (SCG).
3. The method of claim 1 , wherein:
receiving the MAC CE from the serving RAN comprises receiving the MAC CE from a serving base station associated with the serving RAN, and
the serving base station comprises one of a master base station and a secondary base station.
4. The method of claim 1 , further comprising delivering the duplicated PDCP PDUs to the serving RAN through each active split bearer that has a corresponding bit in the second bitmap set to one.
5. The method of claim 1 , further comprising not delivering the duplicated PDCP PDUs to the serving RAN through each inactive split bearer that has a corresponding bit in the second bitmap set to zero.
6. The method of claim 1 , further comprising deactivating the PDCP PDU duplication configuration associated with the radio bearer when all of the bits in the second bitmap are set to zero.
7. A user equipment (UE), comprising:
one or more processors; and
one or more non-transitory computer-readable media coupled with the one or more processors, having instructions embodied thereon, which, when executed by at least one of the one or more processors, cause the UE to:
receive, from a serving radio access network (RAN), through dedicated control radio resource control (RRC) signaling, a packet data convergence protocol (PDCP) protocol data unit (PDU) duplication configuration and a first bitmap, the PDCP PDU duplication configuration for configuring at least two split bearers associated with a cell group, each split bearer having a one-on-one relationship with one radio link control (RLC) entity of the UE, each bit in the first bitmap for indicating whether a corresponding one of the at least two split bearers is active or inactive for transmitting duplicated PDCP PDUs to the serving RAN; and
receiving, from the serving RAN, a medium access control (MAC) control element (CE) for reconfiguring the at least two split bearers, the MAC CE comprising a second bitmap, each bit in the second bitmap also for indicating whether a corresponding one of the at least two split bearers is active or inactive for transmitting the duplicated PDCP PDUs to the serving RAN.
8. The UE of claim 7 , wherein the cell group comprises one of a master cell group (MCG) and a secondary cell group (SCG).
9. The UE of claim 7 , wherein:
receiving the MAC CE from the serving RAN comprises receiving the MAC CE from a serving base station associated with the serving RAN, and
the serving base station comprises one of a master base station and a secondary base station.
10. The UE of claim 7 , wherein the instructions, when executed by the at least one processor, further cause the UE to deliver the duplicated PDCP PDUs to the serving RAN through each active split bearer that has a corresponding bit in the second bitmap set to one.
11. The UE of claim 7 , wherein the instructions, when executed by the at least one processor, further cause the UE to not deliver the duplicated PDCP PDUs to the serving RAN through each inactive split bearer that has a corresponding bit in the second bitmap set to zero.
12. The UE of claim 7 , wherein the instructions, when executed by the at least one processor, further cause the UE to deactivate the PDCP PDU duplication configuration associated with the radio bearer when all of the bits in the second bitmap are set to zero.
13. The method of claim 1 , wherein receiving the PDCP PDU duplication configuration through the RRC signaling from the serving RAN comprises receiving the RRC signaling from a serving base station, the serving base station being one of a master base station and a secondary base station.
14. The method of claim 1 , wherein
the second bitmap received through the MAC CE is prioritized over the first bitmap received through the RRC signaling.
15. The UE of claim 7 , wherein receiving the PDCP PDU duplication configuration through the RRC signaling from the serving RAN comprises receiving the RRC signaling from a serving base station, the serving base station being one of a master base station and a secondary base station.
16. The UE of claim 7 , wherein the
second bitmap received through the MAC CE is prioritized over the first bitmap received through the RRC signaling.