System and method for information delivery with multiple point transmission

Patent metadata

Field	Value
Publication number	US-11070482-B2
Application number	US-201916354517-A
Country	US
Kind code	B2
Filing date	Mar 15, 2019
Priority date	Oct 7, 2011
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

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 comprising:
receiving, by a first transmission point (TP), downlink data packets of a single radio bearer that are scheduled for multipoint transmission by at least the first TP and a second TP;
transmitting, by the first TP, radio resource control (RRC) signaling to a user equipment (UE), the RRC signaling configuring the UE to receive the downlink data packets over the single radio bearer from both a radio link control (RLC) entity of the first TP and an RLC entity of the second TP;
sending, by the first TP, a second subset of the downlink data packets of the single radio bearer directly from a packet data convergence protocol (PDCP) entity of the first TP to the RLC entity of the second TP such that the second subset of downlink data packets are sent from the first TP to the second TP without the second subset of downlink data packets passing through the RLC entity of the first TP and without the second subset of downlink data packets passing through any PDCP entity of the second TP, the second subset of downlink data packets being transmitted from the RLC entity of the second TP to the UE; and
transmitting, by the first TP, a first subset of the downlink data packets of the single radio bearer to the UE.

2. The method of claim 1 , further comprising splitting, by the PDCP entity of the first TP, the downlink data packets into the first subset of downlink data packets of the single radio bearer and the second subset of downlink data packets of the single radio bearer.

3. The method of claim 2 , wherein splitting the downlink data packets comprises splitting the downlink data packets according to a distribution load provided by a network entity.

4. The method of claim 2 , further comprising exchanging, by the first TP with the second TP, messages to configure the splitting of the downlink data packets of the single radio bearer.

5. The method of claim 1 , further comprising distributing, by the PDCP entity of the first TP, the first subset of downlink data packets of the single radio bearer to an RLC entity of the first TP.

6. The method of claim 1 , wherein the single radio bearer is an enhanced packet system (EPS) bearer.

7. The method of claim 1 , wherein the single radio bearer is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Radio Access Bearer (E_RAB).

8. The method of claim 1 , further comprising at least partially processing, at the PDCP entity of the first TP, the second subset of downlink data packets to obtain PDCP data units prior to sending the second subset of downlink data packets directly from the PDCP entity of the first TP to the RLC entity of the second TP, the second subset of downlink data packets being communicated in the form of the PDCP data units when sent directly from the PDCP entity of the first TP to the RLC entity of the second TP.

9. A method comprising:
transmitting, by a first transmission point (TP), radio resource control (RRC) signaling to a user equipment (UE), the RRC signaling configuring the UE to transmit uplink data packets over a single radio bearer to both a radio link control (RLC) entity of the first TP and an RLC entity of a second TP;
receiving, by the first TP, a first subset of uplink data packets of the single radio bearer from the UE;
receiving, by the first TP, a second subset of the uplink data packets of the single radio bearer from the second TP, the second subset of uplink data packets being received by a packet data convergence protocol (PDCP) entity of the first TP directly from the RLC entity of the second TP such that the second subset of uplink data packets are communicated from the second TP to the first TP without the second subset of uplink data packets passing through any PDCP entity of the second TP and without the second subset of uplink data packets passing through the RLC entity of the first TP; and
sending, by the PDCP entity of the first TP to a higher protocol entity of the first TP, the uplink data packets of the single radio bearer.

10. The method of claim 9 , further comprising combining, by the PDCP entity of the first TP, the first subset of uplink data packets of the single radio bearer and the second subset of uplink data packets of the single radio bearer into the uplink data packets of the single radio bearer.

11. The method of claim 9 , wherein the first subset of uplink data packets of the single radio bearer are received from the UE at an RLC entity of the first TP.

12. The method of claim 9 , wherein the single radio bearer is an enhanced packet system (EPS) bearer.

13. The method of claim 9 , wherein the single radio bearer is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Radio Access Bearer (E_RAB).

14. The method of claim 9 , further comprising exchanging, by the first TP with the second TP, messages to configure processing of the uplink data packets of the single radio bearer.

15. A first transmission point (TP) comprising:
a processor; and
a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to:
receive downlink data packets of a single radio bearer that are scheduled for multipoint transmission by at least the first TP and a second TP;
transmit radio resource control (RRC) signaling to a user equipment (UE), the RRC signaling configuring the UE to receive the downlink data packets over the single radio bearer from both a radio link control (RLC) entity of the first TP and an RLC entity of the second TP;
send a second subset of the downlink data packets of the single radio bearer directly from a packet data convergence protocol (PDCP) entity of the first TP to the RLC entity of the second TP such that the second subset of downlink data packets are sent from the first TP to the second TP without the second subset of downlink data packets passing through the RLC entity of the first TP and without the second subset of downlink data packets passing through any PDCP entity of the second TP, the second subset of downlink data packets being transmitted by the second TP to a user equipment (UE); and
transmit a first subset of the downlink data packets of the single radio bearer to the UE.

16. The first TP of claim 15 , wherein the programming further includes instructions to split, at the PDCP entity of the first TP, the downlink data packets into the first subset of downlink data packets of the single radio bearer and the second subset of downlink data packets of the single radio bearer.

17. The first TP of claim 16 , wherein the instructions to split the downlink data packets include instructions to split the downlink data packets according to a distribution load provided by a network entity.

18. The first TP of claim 16 , wherein the programming further includes instructions to exchange, with the second TP, messages to configure the splitting of the downlink data packets of the single radio bearer.

19. The first TP of claim 15 , wherein the programming further includes instructions to distribute, via the PDCP entity of the first TP, the first subset of downlink data packets of the single radio bearer to an RLC entity of the first TP.

20. The first TP of claim 15 , wherein the single radio bearer is an enhanced packet system (EPS) bearer.

21. The first TP of claim 15 , wherein the single radio bearer is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Radio Access Bearer (E_RAB).

22. The first TP of claim 15 , wherein t

Assignees

• Futurewei Technologies Inc

Inventors

• Bi Hao
• Sun Yishen

Classifications

• H04L1/1841 Primary

  Resequencing · CPC title

• H04L1/1896

  ARQ related signaling · CPC title

• H04L47/34 Primary

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

• H04L43/16

  Threshold monitoring · CPC title

• H04L43/0888

  Throughput · CPC title