Transmitting device and method performed therein for handling communication
Embodiments herein relate to a method performed by a transmitting device ( 120 ) for handling communication in a wireless communications network, wherein the transmitting device ( 120 ) comprises at least two radio link control, RLC, entities and is configured with a split bearer to a receiving device ( 100 ). The transmitting device ( 120 ) identifies that a last transmitted protocol data unit, PDU, of one of the at least two RLC entities, is lacking a poll indicator requesting a status of one or more transmitted PDUs. When identifying that the last transmitted PDU lacks the poll indicator, the transmitting device transmits to the receiving device ( 100 ), a PDU comprising a poll indicator.
1. A method performed by a transmitting device for handling communication in a wireless communications network, wherein the transmitting device comprises at least two radio link control, RLC, entities and is configured with a split bearer to a receiving device, the method comprising:
responsive to occurrence of an event, identifying that a protocol data unit (PDU) last transmitted on one of the at least two RLC entities before occurrence of the event lacks a poll indicator requesting a status of one or more transmitted PDUs, wherein the event is:
stopping of transmission on one or more of the at least two RLC entities while data still awaits in higher layers associated to a first RLC entity;
transmission on one or more of the at least two RLC entities is switched to another RLC entity while data still awaits in higher layers associated to a first RLC entity;
no further upper layer transmit buffer data is available for transmission in a corresponding RLC entity;
re-configuration to deactivate splitting or deactivate duplication; or
upper layers, of a corresponding RLC entity, become empty of packets; and
responsive to identifying that the PDU last transmitted lacks the poll indicator, transmitting, to the receiving device, a PDU comprising a poll indicator.
2. The method according to claim 1 , wherein the PDU comprising the poll indicator is another PDU with the poll indicator or the same PDU as the PDU last transmitted retransmitted with the poll indicator.
3. The method according to claim 1 , wherein the event is stopping of transmission on one or more of the at least two RLC entities while data still awaits in higher layers associated to a first RLC entity.
4. The method according to claim 1 , wherein the event is transmission on one or more of the at least two RLC entities is switched to another RLC entity while data still awaits in higher layers associated to a first RLC entity.
5. The method according to claim 1 , wherein the event is no further upper layer transmit buffer data is available for transmission in a corresponding RLC entity.
6. The method according to claim 1 , wherein the event is re-configuration to deactivate splitting or deactivate duplication.
7. The method according to claim 1 , wherein the event is upper layers, of a corresponding RLC entity, become empty of packets.
8. A transmitting device for handling communication in a wireless communications network, wherein the transmitting device comprises:
processing circuitry configured to:
responsive to occurrence of an event, identify that a protocol data unit (PDU) last transmitted on one of at least two radio link control (RLC) entities of the transmitting device before occurrence of the event lacks a poll indicator requesting a status of one or more transmitted PDUs, wherein the event is:
stopping of transmission on one or more of the at least two RLC entities while data still awaits in higher layers associated to a first RLC entity;
transmission on one or more of the at least two RLC entities is switched to another RLC entity while data still awaits in higher layers associated to a first RLC entity;
no further upper layer transmit buffer data is available for transmission in a corresponding RLC entity;
re-configuration to deactivate splitting or deactivate duplication; or
upper layers, of a corresponding RLC entity, become empty of packets; and
responsive to identifying that the PDU last transmitted lacks the poll indicator, transmit, to a receiving device to which the transmitting device is configured with a split bearer, a PDU comprising a poll indicator.
9. The transmitting device according to claim 8 , wherein the PDU comprising the poll indicator is another PDU with the poll indicator or the same PDU as the PDU last transmitted retransmitted with the poll indicator.
10. The transmitting device according to claim 8 , wherein the event is stopping of transmission on one or more of the at least two RLC entities while data still awaits in higher layers associated to a first RLC entity.
11. The transmitting device according to claim 8 , wherein the event is transmission on one or more of the at least two RLC entities is switched to another RLC entity while data still awaits in higher layers associated to a first RLC entity.
12. The transmitting device according to claim 8 , wherein the event is no further upper layer transmit buffer data is available for transmission in a corresponding RLC entity.
13. The transmitting device according to claim 8 , wherein the event is re-configuration to deactivate splitting or deactivate duplication.
14. The transmitting device according to claim 8 , wherein the event is upper layers, of a corresponding RLC entity, become empty of packets.
15. A non-transitory computer-readable storage medium having stored thereon a computer program product comprising instructions which, when executed on at least one processor of a transmitting device, cause the at least one processor to:
responsive to occurrence of an event, identify that a protocol data unit (PDU) last transmitted on one of at least two radio link control (RLC) entities of the transmitting device before occurrence of the event lacks a poll indicator requesting a status of one or more transmitted PDUs, wherein the event is:
stopping of transmission on one or more of the at least two RLC entities while data still awaits in higher layers associated to a first RLC entity;
transmission on one or more of the at least two RLC entities is switched to another RLC entity while data still awaits in higher layers associated to a first RLC entity;
no further upper layer transmit buffer data is available for transmission in a corresponding RLC entity;
re-configuration to deactivate splitting or deactivate duplication; or
upper layers, of a corresponding RLC entity, become empty of packets; and
responsive to identifying that the PDU last transmitted lacks the poll indicator, transmit, to a receiving device to which the transmitting device is configured with a split bearer, a PDU comprising a poll indicator.
16. The non-transitory computer-readable storage medium according to claim 15 , wherein the PDU comprising the poll indicator is another PDU with the poll indicator or the same PDU as the PDU last transmitted retransmitted with the poll indicator.
17. The non-transitory computer-readable storage medium according to claim 15 , wherein the event is stopping of transmission on one or more of the at least two RLC entities while data still awaits in higher layers associated to a first RLC entity.
18. The non-transitory computer-readable storage medium according to claim 15 , wherein the event is transmission on one or more of the at least two RLC entities is switched to another RLC entity while data still awaits in higher layers associated to a first RLC entity.
19. The non-transitory computer-readable storage medium according to claim 15 , wherein the event is no further upper layer transmit buffer data is available for transmission in a corresponding RLC entity.
20. The non-transitory computer-readable storage medium according to claim 15 , wherein the event is re-configuration to deactivate splitting or deactivate duplication.
21. The non-transitory computer-readable storage medium according to claim 15 , wherein the event is upper layers, of a corresponding RLC entity, become empty of packets.