System and method for multiple point transmission in a communications system

Patent metadata

Field	Value
Publication number	US-10090890-B2
Application number	US-201514621017-A
Country	US
Kind code	B2
Filing date	Feb 12, 2015
Priority date	Oct 7, 2011
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

A system and method for multiple point transmission in a communications system are provided. A method for multiple point transmission operation comprises modifying a configuration of a radio bearer for use in a multiple point transmission to a user equipment according to operating condition information of the user equipment, reconfiguring the radio bearer according to the modified configuration, and initiating a multiple point transmission to the user equipment using the reconfigured radio bearer.

First claim

What is claimed is:

1. A method of operating a first transmission point, the method comprising:
processing, by the first transmission point, a downlink data of a bearer at a packet data convergence protocol (PDCP) layer;
splitting, by the first transmission point at the PDCP layer, the downlink data of the bearer into a first data of the bearer and a second data of the bearer;
processing, by the first transmission point, the first data of the bearer at a radio link control (RLC) layer of the first transmission point;
distributing, by the first transmission point at the PDCP layer, the second data of the bearer to an RLC layer of a second transmission point without going through a PDCP layer of the second transmission point; and
transmitting, by the first transmission point, the first data of the bearer to a user equipment in conjunction with the second transmission point transmitting the second data of the bearer to the user equipment.

2. The method of claim 1 , wherein splitting the downlink data comprises splitting the downlink data according to a distribution load provided by a network entity.

3. The method of claim 1 , further comprising receiving, by the first transmission point, packet delivery status information from the second transmission point.

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

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

6. The method of claim 1 , further comprising:
exchanging, by the first transmission point with the second transmission point, messages to configure the splitting of the downlink data of the bearer.

7. A method of operating a second transmission point, the method comprising:
receiving, by the second transmission point, a second data of a bearer from a first transmission point, downlink data of the bearer being split into a first data of the bearer and the second data of the bearer at a packet data convergence protocol (PDCP) layer of the first transmission point, the second data distributed from the PDCP layer of the first transmission point to a radio link control (RLC) layer of the second transmission point without going through a PDCP layer of the second transmission point;
processing, by the second transmission point, the second data of the bearer at the RLC layer of the second transmission point; and
transmitting, by the second transmission point, the second data of the bearer to a user equipment in conjunction with the first transmission point transmitting the first data of the bearer to the user equipment.

8. The method of claim 7 , wherein the downlink data is split according to a distribution load provided by a network entity.

9. The method of claim 7 , further comprising providing, by the second transmission point, packet delivery status information to the first transmission point.

10. The method of claim 7 , wherein the bearer is an enhanced packet system (EPS) bearer.

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

12. The method of claim 7 , further comprising:
exchanging, by the second transmission point with the first transmission point, messages to configure the split of the downlink data of the bearer.

13. A first transmission point comprising:
a processor configured to:
process a downlink data of a bearer at a packet data convergence protocol (PDCP) layer,
split, at the PDCP layer of the first transmission point, the downlink data of the bearer into a first data of the bearer and a second data of the bearer, and
process the first data of the bearer at a radio link control (RLC) layer of the first transmission point; and

a first transmitter coupled to the processor, wherein the first transmitter is configured to distribute the second data of the bearer from the PDCP layer of the first transmission point to a radio link control (RLC) layer of a second transmission point without going through a PDCP layer of the second transmission point; and
a second transmitter coupled to the processor, wherein the second transmitter is configured to transmit the first data of the bearer to a user equipment in conjunction with the second transmission point transmitting the second data of the bearer to the user equipment.

14. The first transmission point of claim 13 , wherein the processor configured to split the downlink data comprises the processor configured to split the downlink data according to a distribution load provided by a network entity.

15. The first transmission point of claim 13 , further comprising a memory coupled to the processor and configured to store transmission packets.

16. The first transmission point of claim 13 , wherein the processor is further configured to receive packet delivery status information from the second transmission point.

17. The first transmission point of claim 13 , wherein the bearer is an enhanced packet system (EPS) bearer.

18. The first transmission point of claim 13 , wherein the bearer is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Radio Access Bearer (E_RAB).

19. The first transmission point of claim 13 , further comprising a receiver coupled to the processor, wherein:
the first transmitter and the receiver are configured to exchange, with the second transmission point, messages to configure the splitting of the downlink data of the bearer.

20. A second transmission point comprising:
a receiver configured to receive a second data of a bearer from a first transmission point, wherein downlink data of the bearer is split into a first data of the bearer and the second data of the bearer at a packet data convergence protocol (PDCP) layer of the first transmission point, the second data distributed from the PDCP layer of the first transmission point to a radio link control (RLC) layer of the second transmission point without going through a PDCP layer of the second transmission point;
a processor coupled to the receiver, wherein the processor is configured to process the second data of the bearer at the RLC layer; and
a transmitter coupled to the processor, wherein the transmitter is configured to transmit the second data of the bearer to a user equipment in conjunction with the first transmission point transmitting the first data of the bearer to the user equipment.

21. The second transmission point of claim 20 , wherein the downlink data is split according to a distribution load provided by a network entity.

22. The second transmission point of claim 20 , wherein the processor is further configured to provide packet delivery status information to the first transmission point.

23. The second transmission point of claim 20 , further comprising a memory coupled to the processor and configured to store transmission packets.

24. The second transmission point of claim 20 , wherein the bearer is an enhanced packet system (EPS) bearer.

25. The second transmission point of claim 20 , wherein the bearer is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Radio Access Bearer (E_RAB).

26. The second transmission point of claim 20 , wherein the receiver and the transmitter are configured to exchange, with the first transmission point, messages to configure the split of the downlink data of the bearer.

Assignees

• Futurewei Technologies Inc

Inventors

• Bi Hao
• Sun Yishen

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/52

  based on load · CPC title

• H04L5/0035

  Resource allocation in a cooperative multipoint environment · CPC title

• H04W68/00

  User notification, e.g. alerting and paging, for incoming communication, change of service or the like · CPC title

• H04B7/024 Primary

  Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems · CPC title