COMPENSATION METHOD, BASE STATION, AND USER EQUIPMENT FOR UPLINK POWER CONTROL IN A CoMP SYSTEM

• US 20140161078A1
• Filed: 02/14/2014
• Published: 06/12/2014
• Est. Priority Date: 08/16/2011
• 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: ZHANG, Jiayin, REN, Xiaotao, NI, Jun, NI, Wei
• Granted Patent: US 9,924,473 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: 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
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/247 where the output power of a terminal is based on a path parameter sent by another terminal
• CPC Class Codes: H04W 52/248 where transmission power control commands are generated based on a path parameter
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/362 Aspects of the step size
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 52/58 Format of the TPC bits

Abstract

A compensation method, a base station, and a user equipment for uplink power control in a CoMP system are provided. The method includes: a base station determines an adjustment value for an uplink sending power of a UE; the base station sends to the UE indication information and the adjustment value for the uplink sending power of the UE, where the indication information is used for indicating a range of the adjustment value for the uplink sending power of the UE, so that the UE, according to the indication information and the adjustment value for the uplink sending power of the UE, determines the uplink sending power of the UE. Embodiments of the present invention are capable of improving the quality of sending uplink data.

Claims

1. A compensation method for uplink power control in a coordinated multi-point (CoMP) transmission system, comprising:

determining, by a base station, an adjustment value for an uplink sending power of a user equipment (UE); and

sending, by the base station to the UE, indication information and the adjustment value for the uplink sending power of the UE, wherein the indication information is used for indicating a range of the adjustment value for the uplink sending power of the UE, so that the UE, according to the indication information and the adjustment value for the uplink sending power of the UE, determines the uplink sending power of the UE.

2. The method according to claim 1, wherein sending, by the base station to the UE, the indication information comprises:

sending, by the base station, the indication information to the UE through higher layer signaling;

or

sending, by the base station, the indication information to the UE through a physical downlink control channel (PDCCH).

3. The method according to claim 1, wherein:

the adjustment value for the uplink sending power of the UE is identified by 4 bits, and a step of the adjustment value for the uplink sending power of the UE identified by the 4 bits is greater than or equal to 1 dB;

or

the adjustment value for the uplink sending power of the UE is identified by 4 more bits, and a step of the adjustment value for the uplink sending power of the UE identified by 4 more bits is greater than or equal to 1 dB.

4. The method according to claim 1, wherein determining, by the base station, the adjustment value for the uplink sending power of the user equipment UE comprises at least one of the followings:

determining, by the base station, the adjustment value for the uplink sending power of the UE, for uplink power control of a physical uplink shared channel (PUSCH);

determining, by the base station, the adjustment value for the uplink sending power of the UE, for uplink power control of a physical uplink control channel (PUCCH); and

determining, by the base station, the adjustment value for the uplink sending power of the UE, for uplink power control of a sounding reference signal (SRS).

5. The method according to claim 4, wherein determining, by the base station, the adjustment value for the uplink sending power of the UE, for the uplink power control of the SRS, comprises at least one of the followings:

determining, by the base station, the adjustment value for the uplink sending power of the UE associated with a PUSCH, for the uplink power control of the SRS; and

determining, by the base station, the adjustment value for the uplink sending power of the UE associated with the SRS, for the uplink power control of the SRS.

6. The method according to claim 1, wherein determining, by the base station, the adjustment value for the uplink sending power of the UE, comprises at least one of the followings:

P<sub>O—

PUSCH</sub>(j) in a formula

7. A compensation method for uplink power control in a coordinated multi-point (CoMP) transmission system, comprising:

receiving, by a user equipment (UE), indication information and an adjustment value for an uplink sending power of the UE, sent by a base station, wherein the indication information is used for indicating a range of the adjustment value for the uplink sending power of the UE; and

determining, by the UE, the uplink sending power of the UE according to the indication information and the adjustment value for the uplink sending power of the UE.

8. The method according to claim 7, wherein receiving, by the UE, the indication information sent by the base station comprises:

receiving, by the UE, the indication information sent by the base station through higher layer signaling;

or

receiving, by the UE, the indication information sent by the base station through a physical downlink control channel (PDCCH).

9. The method according to claim 7, wherein:

the adjustment value for the uplink sending power of the UE is identified by 4 bits, and a step of the adjustment value for the uplink sending power of the UE identified by 4 bits is greater than or equal to 1 dB;

or

the adjustment value for the uplink sending power of the UE is identified by 4 more bits, and a step of the adjustment value for the uplink sending power of the UE identified by 4 more bits is greater than or equal to 1 dB.

10. The method according to claim 7, wherein receiving, by the UE, the adjustment value for the uplink sending power of the UE sent by the base station comprises at least one of the followings:

receiving, by the UE, the adjustment value for the uplink sending power of the UE, for uplink power control of a physical uplink shared channel (PUSCH), sent by the base station;

receiving, by the UE, the adjustment value for the uplink sending power of the UE, for uplink power control of a physical uplink control channel (PUCCH), sent by the base station;

receiving, by the UE, the adjustment value for the uplink sending power of the UE, for uplink power control of a sounding reference signal (SRS), sent by the base station.

11. The method according to claim 10, wherein receiving, by the UE, the adjustment value for the uplink sending power of the UE, for uplink power control of the SRS, sent by the base station, comprises at least one of the followings:

receiving, by the UE, the adjustment value for the uplink sending power of the UE associated with the PUSCH, for the uplink power control of the SRS, sent by the base station;

receiving, by the UE, the adjustment value for the uplink sending power of the UE associated with the SRS, for the uplink power control of the SRS, sent by the base station.

12. The method according to claim 7, wherein receiving, by the UE, the adjustment value for the uplink sending power of the UE sent by the base station comprises at least one of the followings:

P<sub>O—

PUSCH</sub>(j) in a formula

13. A base station, comprising:

a determination unit, configured to determine an adjustment value for an uplink sending power of a user equipment (UE); and

a sending unit, configured to send to the UE indication information and the adjustment value for the uplink sending power of the UE determined by the determination unit, wherein the indication information is used for indicating a range of the adjustment value for the uplink sending power of the UE, so that the UE, according to the indication information and the adjustment value for the uplink sending power of the UE, determines the uplink sending power of the UE.

14. The base station according to claim 13, wherein:

the sending unit is specifically configured to send the indication information to the UE through higher layer signaling;

or

the sending unit is specifically configured to send the indication information to the UE through a physical downlink control channel (PDCCH).

15. The method according to claim 13, wherein the determination unit comprises at least one subunit of the followings:

a first determination subunit, configured to determine the adjustment value for the uplink sending power of the UE, for uplink power control of a physical uplink shared channel (PUSCH);

a second determination subunit, configured to determine the adjustment value for the uplink sending power of the UE, for uplink power control of a physical uplink control channel (PUCCH); and

a third determination subunit, configured to determine the adjustment value for the uplink sending power of the UE, for uplink power control of a sounding reference signal (SRS).

16. The base station according to claim 15, wherein the third determination subunit comprises at least one module of the followings:

a first determination module, configured to determine the adjustment value for the uplink sending power of the UE associated with the PUSCH, for uplink power control of the SRS; and

a second determination module, configured to determine the adjustment value for the uplink sending power of the UE associated with the SRS, for uplink power control of the SRS.

17. A user equipment (UE), comprising:

a receiving unit, configured to receive indication information and an adjustment value for an uplink sending power of the UE, sent by a base station, wherein the indication information is used for indicating a range of the adjustment value for the uplink sending power of the UE; and

a processing unit, configured to determine, the uplink sending power of the UE according to the indication information and the adjustment value for the uplink sending power of the UE received by the receiving unit.

18. The UE according to claim 17, wherein:

the receiving unit is specifically configured to receive the indication information sent by the base station through higher layer signaling;

or

the receiving unit is specifically configured to receive the indication information sent by the base station through a physical downlink control channel (PDCCH).

19. The UE according to claim 17, wherein the receiving unit comprises at least one subunit of the followings:

a first receiving subunit, configured to receive the adjustment value for the uplink sending power of the UE, for uplink power control of a physical uplink shared channel (PUSCH), sent by the base station;

a second receiving subunit, configured to receive the adjustment value for the uplink sending power of the UE, for uplink power control of a physical uplink control channel (PUCCH), sent by the base station; and

a third receiving subunit, configured to receive the adjustment value for the uplink sending power of the UE, for uplink power control of a sounding reference signal (SRS), sent by the base station.

20. The UE according to claim 19, wherein the third receiving subunit comprises at least one module of the followings:

a first receiving module, configured to receive the adjustment value for the uplink sending power of the UE associated with the PUSCH, for the uplink power control of the SRS, sent by the base station; and

a second receiving module, configured to receive the adjustment value for the uplink sending power of the UE associated with the SRS, for the uplink power control of the SRS, sent by the base station.