MULTI-ANTENNA DIVERSITY SCHEDULING METHOD AND APPARATUS

• US 20130148608A1
• Filed: 02/08/2013
• Published: 06/13/2013
• Est. Priority Date: 08/13/2010
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Wang, Yi, Bi, Xiaoyan
• Granted Patent: US 8,989,097 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04B 7/0684 using different training sequences per antenna
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

The present invention provides a multi-antenna diversity scheduling method and apparatus. The method includes: transmitting pilot signals through x transmit antennas, where pilot signals on 1 to x−1 transmit antennas are a product of pilot symbols and a phase sequence, the phase sequence changes with at least one of time and frequency, the phase sequence changes more frequently than a user channel, and x is a positive integer greater than or equal to 2; receiving a transient channel quality information (CQI) value returned by a user according to the pilot signals; and according to the CQI value and a scheduling algorithm, scheduling the user to transmit data.

Claims

1. A multi-antenna diversity scheduling method, comprising:

transmitting pilot signals through x transmit antennas, wherein the pilot signals on 1 to x−

1 transmit antennas are a product of pilot symbols and a phase sequence, wherein the phase sequence changes with at least one of time and frequency, the phase sequence changes more frequently than a user channel, and x is a positive integer greater than or equal to 2;

receiving a transient channel quality information (CQI) value returned by a user according to the pilot signals; and

according to the transient CQI value and a scheduling algorithm, scheduling the user to transmit data.

2. The method according to claim 1,

wherein the phase sequence is a sequence changing with frequency comprises:

the phase sequence is a linear sequence of subcarriers or a linear sequence of subcarrier groups on a frequency domain.

3. The method according to claim 1, wherein:

the product of the pilot symbols and the phase sequence is

4. The method according to claim 3, wherein according to the transient CQI value and a scheduling algorithm, scheduling the user to transmit data comprises:

according to the transient CQI value and a maximum channel quality information (MAX-CQI) scheduling algorithm, scheduling the user to transmit data, wherein the MAX-CQI algorithm is

5. The method according to claim 3, wherein according to the transient CQI value and a scheduling algorithm, scheduling the user to transmit data comprises:

according to the transient CQI value and a proportional fairness (PF) algorithm, scheduling the user to transmit data, wherein the PF algorithm is;

6. A multi-antenna diversity scheduling apparatus, comprising:

x transmit antennas, configured to transmit pilot signals;

a channel adjusting unit, configured to multiply pilot symbols by a phase sequence, then transmit product through 1 to x−

1 transmit antennas to a user, wherein the phase sequence changes with at least one of time and frequency, the phase sequence changes more frequently than a user channel, and x is a positive integer greater than or equal to 2;

a CQI receiving unit, configured to receive a transient channel quality information (CQI) value returned by the user according to the pilot signals; and

a scheduling unit, configured to, according to the transient CQI value and a scheduling algorithm, schedule the user to transmit data.

7. The apparatus according to claim 6, further comprising:

a phase sequence generating unit, configured to generate a phase sequence, and send the phase sequence to the channel adjusting unit, wherein the phase sequence is a linear sequence of subcarriers or a linear sequence of subcarrier groups on a frequency domain.

8. The apparatus according to claim 6, wherein:

a product of the pilot symbols and the phase sequence is

9. The apparatus according to claim 8, wherein according to the transient CQI value and a scheduling algorithm, schedule the user to transmit data comprises:

according to the transient CQI value and a maximum channel quality information (MAX-CQI) scheduling algorithm, scheduling the user to transmit data, wherein the MAX-CQI algorithm is

10. The apparatus according to claim 8, wherein according to the transient CQI value and a scheduling algorithm, schedule the user to transmit data comprises:

according to the transient CQI value and a proportional fairness (PF) algorithm, scheduling the user to transmit data, wherein the PF algorithm is;