System and method for information delivery with multiple point transmission

Patent metadata

Field	Value
Publication number	US-9871736-B2
Application number	US-201514934875-A
Country	US
Kind code	B2
Filing date	Nov 6, 2015
Priority date	Oct 7, 2011
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

Abstract

A system and method for information delivery with multiple point transmission are provided. A method for detecting lost packets is provided. The method includes initiating a timer for a received packet at a receiving transmission point, where the timer is set according to a time value associated with the received packet. The method also includes determining that a delivery of the received packet has failed according to the timer elapsing, and transmitting a lost packet report to a primary transmission point that distributed the received packet to the receiving transmission point.

First claim

What is claimed is:

1. A method for reporting delivery status of a plurality of packet data convergence protocol (PDCP) packets of a PDCP stream split from a single bearer, the method comprising:
initiating, by a receiving transmission point, a threshold evaluator for a transmission condition of the PDCP stream split from the single bearer;
determining, by the receiving transmission point in accordance with the threshold evaluator, the delivery status of the plurality of PDCP packets of the PDCP stream split from the single bearer; and
transmitting, by the receiving transmission point, a report of the delivery status to a primary transmission point that distributed the plurality of PDCP packets to the receiving transmission point.

2. The method of claim 1 , further comprising triggering the transmitting the report of the delivery status to the primary transmission point in response to the threshold evaluator meeting a triggering condition in accordance with a threshold value.

3. The method of claim 1 , wherein the threshold evaluator is a timer.

4. The method of claim 3 , wherein the timer is initiated upon arrival of a PDCP packet at the receiving transmission point.

5. The method of claim 3 , wherein the timer is initiated periodically.

6. The method of claim 1 , wherein the threshold evaluator is a counter.

7. The method of claim 2 , wherein the threshold value associated with the single bearer is configured by the primary transmission point.

8. The method of claim 1 , wherein the report of the delivery status comprises a report of lost packets.

9. The method of claim 1 , wherein determining that the delivery status of a packet as lost comprises the threshold evaluator determining that a triggering condition is met according to a threshold value without the receiving transmission point receiving a positive acknowledgement from a user equipment (UE) for the packet.

10. The method of claim 1 , wherein determining that the delivery status of a packet as lost comprises the threshold evaluator determining that a triggering condition is met according to a threshold value without the packet being delivered successfully to a user equipment (UE).

11. The method of claim 1 , wherein determining that the delivery status of a packet as lost comprises the threshold evaluator determining that a triggering condition is met according to a threshold value without the packet being received successfully by the receiving transmission point from the primary transmission point.

12. The method of claim 1 , wherein determining that the delivery status of a packet as lost comprises receiving a preconfigured number of negative acknowledgements for the packet from a user equipment (UE).

13. The method of claim 1 , wherein transmitting the report of the delivery status comprises transmitting an aggregation of information related to failed packet deliveries for a specified time interval.

14. The method of claim 1 , further comprising configuring, by the receiving transmission point, the threshold evaluator according to a threshold value.

15. The method of claim 1 , wherein a threshold value for the threshold evaluator is configured by a sending transmission point.

16. A receiving transmission point comprising:
a processor configured to:
initiate a threshold evaluator for a transmission condition of a packet data convergence protocol (PDCP) stream split from a single bearer; and
determine, in accordance with the threshold evaluator, a delivery status of a plurality of PDCP packets of the PDCP stream split from the single bearer; and

a transmitter operatively coupled to the processor and configured to transmit a report of the delivery status to a primary transmission point that distributed the plurality of PDCP packets to the receiving transmission point.

17. The receiving transmission point of claim 16 , wherein the processor is configured to trigger the transmitter to transmit the report of the delivery status to the primary transmission point in response to the threshold evaluator meeting a triggering condition in accordance with a threshold value.

18. The receiving transmission point of claim 16 , wherein the threshold evaluator is a timer.

19. The receiving transmission point of claim 18 , wherein the processor is configured to initiate the timer upon arrival of a PDCP packet at the receiving transmission point.

20. The receiving transmission point of claim 18 , wherein the processor is configured to initiate the timer periodically.

21. The receiving transmission point of claim 16 , wherein the threshold evaluator is a counter.

22. The receiving transmission point of claim 17 , wherein the threshold value associated with the single bearer is configured by the primary transmission point.

23. The receiving transmission point of claim 16 , wherein the report of the delivery status comprises a report of lost packets.

24. The receiving transmission point of claim 16 , wherein the processor configured to determine the delivery status of a packet as lost comprises the threshold evaluator configured to determine that a triggering condition is met according to a threshold value without the receiving transmission point receiving a positive acknowledgement from a user equipment (UE) for the packet.

25. The receiving transmission point of claim 16 , wherein the processor configured to determine the delivery status of a packet as lost comprises the threshold evaluator configured to determine that a triggering condition is met according to a threshold value without the packet being delivered successfully to a user equipment (UE).

26. The receiving transmission point of claim 16 , wherein the processor configured to determine that the delivery status of a packet as lost comprises the threshold evaluator configured to determine that a triggering condition is met according to a threshold value without the packet being received successfully by the receiving transmission point from the primary transmission point.

27. The receiving transmission point of claim 16 , wherein the processor configured to determine that the delivery status of a packet as lost comprises the processor configured to receive a preconfigured number of negative acknowledgements for the packet from a user equipment (UE).

28. The receiving transmission point of claim 16 , wherein the transmitter configured to transmit the report of the delivery status comprises the transmitter configured to transmit an aggregation of information related to failed packet deliveries for a specified time interval.

29. The receiving transmission point of claim 16 , wherein the processor is further configured to configure the threshold evaluator according to a threshold value.

30. The receiving transmission point of claim 16 , wherein a threshold value for the threshold evaluator is configured by a sending transmission point.

Assignees

• Futurewei Technologies Inc

Inventors

• Bi Hao
• Sun Yishen

Classifications

• H04L1/1841 Primary

  Resequencing · CPC title

• H04L47/34 Primary

  ensuring sequence integrity, e.g. using sequence numbers · CPC title

• H04L45/16

  Multipoint routing · CPC title

• H04L43/0888

  Throughput · CPC title

• H04L1/188

  Time-out mechanisms · CPC title