Apparatus and method for transmitting/receiving feedback information in a wireless communication system using beamforming

Patent metadata

Field	Value
Publication number	US-9516525-B2
Application number	US-201314050297-A
Country	US
Kind code	B2
Filing date	Oct 9, 2013
Priority date	Oct 9, 2012
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

An apparatus performs a method for generating information indicating channel quality when a dynamic range of a receive signal strength and an interference signal strength is considerable in a wireless communication system using beamforming. A base station (BS) for processing feedback information for scheduling receives from a mobile station (MS) first feedback information comprising a receive signal strength measurement result in paths selected from a plurality of downlink paths between the BSs and the MS, designates a transmit (TX) resource for interference measurement of the MS based on the first feedback information, receives from the MS second feedback information comprising an interference measurement result in the designated TX resource region, and calculates a Signal to Interference plus Noise Ratio (SINR) of the MS based on the first feedback information and the second feedback information. The designated TX resource includes a resource other than a signal TX resource for the MS.

First claim

What is claimed is:

1. A method for operating a base station (BS) in a wireless communication system, the method comprising:
receiving, from a mobile station (MS), first feedback information comprising a strength measurement for received signals in one or more paths selected from a plurality of downlink paths;
allocating a resource for interference measurement of the MS based on the first feedback information;
receiving, from the MS, second feedback information comprising an interference measurement result in the allocated resource; and
identifying a signal to interference plus noise ratio (SINR) of the MS based on the first feedback information and the second feedback information,
wherein the allocated resource comprises a resource other than a resource for transmitting signals to the MS.

2. The method of claim 1 , further comprising:
generating scheduling information based on the first feedback information and transmitting the generated scheduling information to the MS.

3. The method of claim 2 , wherein the first feedback information comprises a BS identifier (ID), a transmission (TX), beam ID, and a receiving (RX) beam ID indicating RX beam use of the MS in the BS.

4. The method of claim 1 , wherein the SINR is identified in accordance with the following equation:

S
⁢

⁢
I
⁢

⁢
N
⁢

⁢
R

=

Pstrong
desired

∑
s

⁢
Pstrong

+
Pweak
+
Pn

where Pstrong desired denotes a receive signal strength corresponding to a TX beam from the BS to the MS, which is selected from the receive signal strengths of the selected paths for allocation at a particular TX point,

∑
s

⁢
Pstrong

 denotes a strong interference component corresponding to a sum of the receive signal strengths corresponding to the TX beam selected from neighboring BSs of the BS for allocation, in the receive signal strengths of the selected paths excluding the selected TX beam, Pweak denotes a total receive signal strength of the MS for the allocated resource affected by a strong interference component, and Pn denotes a mobile station (MS) for operating a mobile station (MS) in a wireless communication system, the method comprising:
transmitting, to a base station (BS), first feedback information comprising a strength measurement for received signals in one or more paths selected from a plurality of downlink paths between the BSs and the MS;
receiving a resource for interference measurement allocated by the BS based on the first feedback information; and
transmitting, to the BS, second feedback information comprising an interference measurement in the allocated resource so that the BS identifies a signal to interference plus noise ratio (SINR) based on the first feedback information and the second feedback information,
wherein the allocated resource comprises a resource other than a resource for transmitting signals to the MS.

5. The method of claim 4 , wherein the second feedback information comprises information about a total receive signal strength of the MS for the allocated TX resource,

Pweak
⁡

(
t
)

=

Pinst
⁡

(
t
)

-

∑
s

⁢

Pstrong
⁡

(
t
)

where Pinst(t) denotes a total receive signal strength of the MS for a corresponding resource.

6. The method of claim 4 , wherein the second feedback information comprises a weak interference component identified in the allocated TX resource region based on the following equation:

Pweak
⁡

(
t
)

=

Ptotal
⁢

⁢

(
t
)

-

∑
s

⁢

Pstrong
⁡

(
t
)

where Ptotal(t) denotes the total receive strength of the MS at a particular point, and

∑
s

⁢

Pstrong
⁡

(
t
)

 denotes the sum of the receive signal strengths of the TX beam allocated at the particular point.

7. A method of a mobile station (MS) for operating a mobile station (MS) in a wireless communication system, the method comprising:
transmitting, to a base station (BS), first feedback information comprising a strength measurement for received signals in one or more paths selected from a plurality of downlink paths between the BSs and the MS;
receiving a resource for interference measurement allocated by the BS based on the first feedback information; and
transmitting, to the BS, second feedback information comprising an interference measurement in the allocated resource so that the BS identifies a signal to interference plus noise ratio (SINR) based on the first feedback information and the second feedback information,
wherein the allocated resource comprises a resource other than a resource for transmitting signals to the MS.

8. The method of claim 7 , further comprising:
receiving scheduling information generated from the BS based on th

Assignees

• Samsung Electronics Co Ltd
• Samsung Electronics Co Ltd

Inventors

• Jeong Su-Ryong
• Yu Hyun-Kyu
• Jeong Cheol
• Park Jeong-Ho

Classifications

• H04B17/346

  Noise values (signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336) · CPC title

• H04L1/20

  using signal quality detector · CPC title

• H04W24/08 Primary

  Testing, {supervising or monitoring} using real traffic · CPC title

• H04L1/0026 Primary

  Transmission of channel quality indication · CPC title

• H04B7/0619

  using feedback from receiving side (feedback signaling for adaptive modulation/coding H04L1/0001) · CPC title