# US 8,570,963 B2 · Coordinated multi-point (CoMP) network and protocol architecture

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- Number: US 8,570,963 B2
- Document ID: US8570963B2
- Status: Granted
- Kind: B2
- Application number: 12/911,674
- Filed: 2010-10-25
- Published: 2011-11-03
- Granted: 2013-10-29
- Earliest claimed: 2009-10-26
- Assignees: QUALCOMM Incorporated
- Applicants: Peter A. Barany; Alexei Y. Gorokhov; Vikas Jain; Tao Luo; Yongbin Wei
- Inventors: Peter A. Barany; Alexei Y. Gorokhov; Vikas Jain; Tao Luo; Yongbin Wei
- Web page: https://patentgrep.com/patent/US8570963B2

## CPC

- H04W 72/27: between access points
- H04B 7/024: Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
- H04B 7/063: {Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection}
- H04B 7/0632: {Channel quality parameters, e.g. channel quality indicator [CQI]}
- H04B 7/0639: {Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection}
- H04W 92/20: between access points
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION

## Abstract

Aspects of the present disclosure relate generally to wireless communication systems, and more particularly to a coordinated multi-point network and protocol architecture. One aspect discloses a method of wireless communication and includes receiving a measurement report from a user equipment (UE). Coordinated multi point (CoMP) control messages are transmitted from a first eNodeB to a second eNodeB at a medium access control (MAC) layer in response to the received measurement report.

## Claims

### Claim 1

A method of wireless communication, comprising:
generating at a first evolved NodeB (eNodeB) a plurality of medium access control (MAC) layer protocol data units (PDUs) for retransmission by a second eNodeB to a user equipment (UE); and
transmitting at least one coordinated multi point (CoMP) control message comprising the plurality of MAC layer PDUs over an X2 interface from the first eNodeB to the second eNodeB at the MAC layer for retransmission to the UE.

### Claim 2 (depends on 1)

The method of claim 1, in which the at least one CoMP control message comprise a downlink shared channel (DL-SCH) message.

### Claim 3 (depends on 1)

The method of claim 1, in which the at least one CoMP control message comprises at least one of a UE associated service message or a UE non-associated service message.

### Claim 4 (depends on 1)

The method of claim 1, in which the at least one CoMP control message comprises at least one of channel state information, scheduling information, flow control information or beam forming information.

### Claim 5 (depends on 1)

The method of claim 1, wherein the plurality of MAC layer PDUs further comprise CoMP data messages from the first eNodeB to the second eNodeB at the MAC layer.

### Claim 6 (depends on 1)

The method of claim 1, further comprising transmitting at least one CoMP data message separate from the at least one CoMP control message from the first eNodeB to the second eNodeB, the at least one CoMP data message comprising a second plurality of MAC protocol data units (PDUs) for retransmission by the second eNodeB.

### Claim 7

An apparatus of a wireless network, comprising:
means for generating at a first evolved nodeB (eNodeB) a plurality of medium access control (MAC) layer protocol data units (PDUs) for retransmission by a second eNodeB to a user equipment (UE); and
means for transmitting at least one coordinated multi point (CoMP) control message comprising the plurality of MAC layer PDUs over an X2 interface from the first eNodeB to the second eNodeB at the MAC layer for retransmission to the UE.

### Claim 8 (depends on 7)

The apparatus of claim 7, in which the at least one CoMP control message comprises a downlink shared channel (DL-SCH) message.

### Claim 9 (depends on 7)

The apparatus of claim 7, in which the at least one CoMP control message comprises at least one of a UE associated service message or a UE non-associated service message.

### Claim 10 (depends on 7)

The apparatus of claim 7, in which the at least one CoMP control message comprises at least one of channel state information, scheduling information, flow control information or beam forming information.

### Claim 11 (depends on 7)

The apparatus of claim 7, wherein the plurality of MAC layer PDUs further comprise CoMP data messages from the first eNodeB to the second eNodeB at the MAC layer.

### Claim 12 (depends on 7)

The apparatus of claim 7, further comprising means for transmitting at least one CoMP data message separate from the at least one CoMP control message from the first eNodeB to the second eNodeB, the at least one CoMP data message comprising a second plurality of MAC protocol data units (PDUs) for retransmission by the second eNodeB.

### Claim 13

A computer program product for wireless communications in a wireless network, comprising:
a non-transitory computer-readable medium having program code recorded thereon, the program code comprising:
program code to generate at a first evolved nodeB (eNodeB) a plurality of medium access control (MAC) layer protocol data units (PDUs) for retransmission by a second eNodeB to a user equipment (UE); and
program code to transmit at least one coordinated multi point (CoMP) control message comprising the plurality of MAC layer PDUs over an X2 interface from the first eNodeB to the second eNodeB at the MAC layer for retransmission to the UE.

### Claim 14 (depends on 13)

The computer program product of claim 13, in which the at least one CoMP control message comprises a downlink shared channel (DL-SCH) message.

### Claim 15 (depends on 13)

The computer program product of claim 13 in which the at least one CoMP control message comprises at least one of a UE associated service message or a UE non-associated service message.

### Claim 16 (depends on 13)

The computer program product of claim 13, in which the at least one CoMP control message comprises at least one of channel state information, scheduling information, flow control information or beam forming information.

### Claim 17 (depends on 13)

The computer program product of claim 13, wherein the plurality of MAC layer PDUs further comprise CoMP data messages from the first eNodeB to the second eNodeB at the MAC layer.

### Claim 18 (depends on 13)

The computer program product of claim 13, further comprising program code to transmit at least one CoMP data message separate from the at least one CoMP control message from the first eNodeB to the second eNodeB, the at least one CoMP data message comprising a second plurality of MAC protocol data units (PDUs) for retransmission by the second eNodeB.

### Claim 19

An apparatus for wireless communication, comprising:
a memory; and
at least one processor coupled to the memory, the at least one processor being configured:
to generate at a first evolved nodeB (eNodeB) a plurality of medium access control (MAC) layer protocol data units (PDUs) for retransmission by a second eNodeB to a user equipment (UE); and
to transmit at least one coordinated multi point (CoMP) control message comprising the plurality of MAC layer PDUs over an X2 interface from the first eNodeB to the second eNodeB at the MAC layer for retransmission to the UE.

### Claim 20 (depends on 19)

The apparatus of claim 19, in which the at least one CoMP control message comprises a downlink shared channel (DL-SCH) message.

### Claim 21 (depends on 19)

The apparatus of claim 19, in which the at least one CoMP control message comprises at least one of a UE associated service message or a UE non-associated service message.

### Claim 22 (depends on 19)

The apparatus of claim 19, in which the at least one CoMP control message comprises at least one of channel state information, scheduling information, flow control information or beam forming information.

### Claim 23 (depends on 19)

The apparatus of claim 19, wherein the plurality of MAC layer PDUs further comprise CoMP data messages from the first eNodeB to the second eNodeB at the MAC layer.

### Claim 24 (depends on 19)

The apparatus of claim 19, the processor further configured to transmit at least one CoMP data message separate from the at least one CoMP control message from the first eNodeB to the second eNodeB, the at least one CoMP data message comprising a second plurality of MAC protocol data units (PDUs).