Baseband processing apparatus in radio communication system and radio communication

Patent metadata

Field	Value
Publication number	US-9602182-B2
Application number	US-201514598342-A
Country	US
Kind code	B2
Filing date	Jan 16, 2015
Priority date	Jul 24, 2012
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

A baseband processing apparatus in a radio communication system, a radio communication system, and a baseband processing method. The apparatus includes a first unit and a second unit that implement different baseband processing functions, where the second unit is configured to generate a precoding matrix of a downlink coordinated multipoint transmission and reception (CoMP) user, generate precoding control information according to the precoding matrix, and send the precoding control information to the first unit; and the first unit is configured to receive the precoding control information sent by the second unit, and perform downlink joint baseband processing on downlink CoMP user data in downlink user data according to the precoding control information, so as to generate jointly sent baseband data for radio sending. The technical solutions can reduce transmission bandwidth between baseband processing units and obtain a system capacity gain at the same time.

First claim

What is claimed is:

1. A baseband processing apparatus in a radio communication system, comprising:
a first unit comprising:
a first processor;
a first receiver coupled to the first processor; and
a first transmitter coupled to the first processor,
wherein the first unit is part of a transceiver node in the radio communication system; and

a second unit coupled to the first unit and comprising:
a second processor configured to:
generate a precoding matrix of a downlink coordinated multipoint transmission and reception (CoMP) user data of a user equipment (UE); and
generate precoding control information according to the precoding matrix; and

a second receiver coupled to the second processor; and
a second transmitter coupled to the second processor and configured to send the precoding control information to the first unit,

wherein the second unit is part of a central processing node in the radio communication system,
wherein the first receiver is configured to:
receive the precoding control information sent by the second unit; and
receive uplink user data and downlink user data of the UE, wherein the uplink user data is data sent from the UE to the first unit, and wherein the downlink user data is data sent from the second unit to the first unit;

wherein the first processor is configured to perform downlink joint baseband processing on the downlink CoMP user data in the downlink user data according to the precoding control information to generate jointly sent baseband data;
wherein the first transmitter is configured to send uplink CoMP user data in the uplink user data to the second receiver, and
wherein the second processor is further configured to complete uplink joint baseband processing on the uplink CoMP user data sent by the first unit to generate uplink transmission user data for non-physical layer processing and to generate uplink transmission user data for a functional unit of media access control (MAC) layer or upper layer to perform non-physical layer processing.

2. The baseband processing apparatus according to claim 1 , wherein the first receiver is further configured to:
receive the precoding control information sent by the second transmitter; and
receive the downlink user data,
wherein the first processor is further configured to:
perform precoding processing according to the downlink CoMP user data in the downlink user data and the precoding control information sent by the second transmitter and received by the first receiver; and
generate the jointly sent baseband data, and obtain the uplink user data, and

wherein the second transmitter is further configured to send the uplink CoMP user data in the uplink user data before demodulation.

3. The baseband processing apparatus according to claim 1 , wherein the second receiver is configured to receive the uplink CoMP user data sent by the first transmitter,
wherein the second processor is further configured to:
demodulate the uplink CoMP user data;
decode the data after demodulation, wherein the functional unit of MAC layer or the upper layer is configured to implement a protocol function of a nonphysical layer;
generate a CoMP precoding matrix according to user channel state information; and
generate the precoding control information according to the CoMP precoding matrix,

wherein the second transmitter is configured to send the precoding control information to the first receiver.

4. The baseband processing apparatus according to claim 3 , wherein the user channel state information comprises at least one of a channel coefficient fed back by the UE, a precoding matrix indicator information fed back by the UE, a channel rank indicator information fed back by the UE, and a downlink channel coefficient estimated using channel reciprocity and according to an uplink sounding reference signal (SRS) sent by the UE.

5. The baseband processing apparatus according to claim 1 , wherein the first processor further configured to:
perform downlink baseband processing on downlink non-COMP user data in the downlink user data obtained from a network side to generate baseband data; and
perform uplink baseband processing on uplink non-CoMP user data in the uplink user data received from an air interface,
wherein the first transmitter is further configured to send data obtained after processing to the functional unit of MAC layer or the upper layer that is configured to implement a protocol function of a non-physical layer.

6. The baseband processing apparatus according to claim 1 , wherein the first unit and the second unit are interconnected through at least one of an international Internet protocol (IP) network, an Ethernet network, a passive optical network (PON), and a wavelength division multiplexing (WDM) network.

7. A radio communication system comprising:
a central processing node (CPN) comprising:
at least one CPN processor configured to implement instructions associated with:
a second unit; and
a functional unit of media access control (MAC) layer or upper layer configured to implement a protocol function of a non-physical layer; and

a transceiver node comprising:
a first unit; and
a radio frequency unit,

wherein the second unit is configured to:
generate a precoding matrix of a downlink coordinated multipoint transmission and reception (CoMP) user data of a user equipment (UE); and
generate precoding control information according to the precoding matrix,

wherein the second unit comprises a second transmitter coupled to the at least one CPN processor and configured to send the precoding control information to the first unit,
wherein the first unit comprises a first receiver configured to:
receive the precoding control information sent by the second unit; and
obtain uplink user data and downlink user data of the UE, wherein the uplink user data is data sent from the UE to the first unit, and wherein the downlink user data is data sent from the second unit to the first unit;

wherein the first unit further comprises a first processor coupled to the first receiver and configured to:
perform downlink joint baseband processing on the downlink CoMP user data in the downlink user data according to the precoding control information; and
generate jointly sent baseband data,

wherein the first unit further comprises a first transmitter coupled to the first processor and configured to send uplink CoMP user data in the uplink user data to the second unit, and
wherein the at least one CPN processor is further configured to:
complete uplink joint baseband processing on the uplink CoMP user data sent by the first unit;
generate uplink transmission user data for non-physical layer processing;
generate uplink transmission user data for the functional unit of media access control (MAC) layer or the upper layer to perform non-physical layer processing;
generate the precoding matrix of the downlink CoMP user data; and
generate the precoding control information according to the precoding matrix; and

wherein the second transmitter is further configured to send the precoding control information to the first unit,
wherein the radio frequency unit is configured to receive joint sent baseband data generated by the first unit to generate a radio signal and receive and send the radio signal,
wherein the functional unit of MAC layer or the upper layer is further configured to:
receive, from the second unit, uplink CoMP user data that has undergone joint baseband processing;
receive, from the first unit, uplink non-CoMP user data that has undergone uplink baseband processing; and
send downlink CoMP user data and downlink non-CoMP user data to the first unit.

8. The radio communication system according to claim 7 , wherein the fir

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhang Jinfang
• Li Bojie
• Lu Lei
• Wu Hongning
• Wu Jianjun

Classifications

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04L1/0077 Primary

  Cooperative coding · CPC title

• H04L5/0035

  Resource allocation in a cooperative multipoint environment · CPC title

• H04B7/0478 Primary

  Special codebook structures directed to feedback optimisation · CPC title

• H04L25/03949

  equalizer selection or adaptation based on feedback (multiple signaling inclusive of a precoding command for adapting the transmitter H04L1/0031; feedback for transmit diversity systems H04B7/0619; selection of codebook or precoding matrix for MIMO diversity systems H04B7/0456) · CPC title