Power control method and apparatus

Patent metadata

Field	Value
Publication number	US-9717059-B2
Application number	US-201414298608-A
Country	US
Kind code	B2
Filing date	Jun 6, 2014
Priority date	Dec 7, 2011
Publication date	Jul 25, 2017
Grant date	Jul 25, 2017

Abstract

Embodiments of the present invention disclose a power control method and apparatus, relate to the field of wireless communications, and are invented for reducing power pressure of an air interface of a base station and ensuring a stable network environment. The method includes: determining whether received total wideband power (RTWP) of an air interface exceeds a set first congestion threshold value; when the RTWP of the air interface exceeds the set first congestion threshold value, sending a congestion indication to a radio network controller (RNC), where the congestion indication is used for indicating that the RNC is forbidden from up-regulating a target signal-to-interference ratio (SIR); receiving a target SIR sent by the RNC; down-regulating the target SIR sent by the RNC; and notifying, based on the down-regulated target SIR, a user equipment (UE) to reduce transmit power. The present invention is mainly applied to the field of power control.

First claim

What is claimed is:

1. A power control apparatus, comprising:
at least one processor configured to determine whether received total wideband power (RTWP) of an air interface exceeds a set first congestion threshold value;
a transmitter configured to, when the at least one processor determines that the RTWP of the air interface exceeds the set first congestion threshold value, send a congestion indication to a radio network controller (RNC), wherein the congestion indication is used for indicating that the RNC is forbidden from up-regulating a target signal-to-interference ratio (SIR); and
a receiver configured to receive a target SIR sent by the RNC;
wherein the at least one processor is further configured to down-regulate the target SIR sent by the RNC and received by the receiver; and
wherein the transmitter is further configured to notify, based on the target SIR down-regulated by the at least one processor, a user equipment (UE) to reduce transmit power.

2. The power control apparatus according to claim 1 , wherein the at least one processor is configured to:
set a UE executing a packet switched domain service as a UE on which down-regulation is preferentially performed; and
set a UE without data transmission as a UE on which down-regulation is preferentially performed.

3. The power control apparatus according to claim 2 , wherein:
the at least one processor is further configured to set a second congestion threshold value, wherein the second congestion threshold value is less than the first congestion threshold value,
the at least one processor is further configured to determine whether the RTWP of the air interface exceeds the second congestion threshold value ;and
when the RTWP of the air interface exceeds the second congestion threshold value:
the receiver is further configured to receive a target SIR of the UE on which down-regulation is preferentially performed that is sent by the RNC;
the at least one processor is further configured to down-regulate the target SIR of the UE on which down-regulation is preferentially performed that is sent by the RNC and received by the receiver; and
the transmitter is further configured to notify, based on the target SIR down-regulated by the at least one processor, the UE on which down-regulation is preferentially performed to reduce transmit power.

4. The power control apparatus according to claim 1 , wherein the at least one processor is further configured to stop uplink packet scheduling.

5. The power control apparatus according to claim 1 , wherein the at least one processor is further configured to, when the RTWP of the air interface is less than the first congestion threshold value, up-regulate the target SIR sent by the RNC, wherein the up-regulated target SIR is not greater than a target SIR sent by the RNC when the RTWP of the air interface is equal to the first congestion threshold value.

6. A power control apparatus, comprising:
at least one processor configured to determine whether received total wideband power (RTWP) of an air interface exceeds a set first congestion threshold value;
a transmitter configured to, when the at least one processor determines that the RTWP of the air interface exceeds the set first congestion threshold value, send a congestion indication to a radio network controller (RNC), wherein the congestion indication is used for indicating that the RNC is forbidden from up-regulating a target signal-to-interference ratio (SIR); and
a receiver configured to receive a target SIR sent by the RNC;
wherein the transmitter is further configured to notify, based on the target SIR sent by the RNC and received by the receiver, a user equipment (UE) to limit transmit power.

7. The power control apparatus according to claim 6 , wherein:
the at least one processor is further configured to, after the receiver receives the target SIR sent by the RNC, down-regulate the target SIR sent by the RNC, and
the transmitter is further configured to notify, based on the target SIR down-regulated by the at least one processor, the user equipment UE to reduce the transmit power.

8. The power control apparatus according to claim 6 , wherein the at least one processor is configured to:
set a UE executing a packet switched domain service as a UE on which down-regulation is preferentially performed; and
set a UE without data transmission as a UE on which down-regulation is preferentially performed.

9. The power control apparatus according to claim 8 , wherein:
the at least one processor is further configured to set a second congestion threshold value, wherein the second congestion threshold value is less than the first congestion threshold value,
the at least one processor is further configured to determine whether the RTWP of the air interface exceeds the second congestion threshold value; and
when the RTWP of the air interface exceeds the second congestion threshold value:
the receiver is further configured to receive a target SIR of the UE on which down-regulation is preferentially performed that is sent by the RNC;
the at least one processor is further configured to down-regulate the target SIR of the UE on which down-regulation is preferentially performed that is sent by the RNC and received by the receiver; and
the transmitter is further configured to notify, based on the target SIR down-regulated by the at least one processor, the UE on which down-regulation is preferentially performed to reduce transmit power.

10. The power control apparatus according to claim 6 , wherein the at least one processor is further configured to stop uplink packet scheduling.

11. The power control apparatus according to claim 6 , wherein:
the at least one processor is further configured to up-regulate the target SIR sent by the RNC when the RTWP of the air interface is less than the first congestion threshold value, wherein the up-regulated target SIR is not greater than a target SIR sent by the RNC when the RTWP of the air interface is equal to the first congestion threshold value.

12. A power control apparatus, comprising:
a receiver configured to receive a target signal-to-interference ratio (SIR) sent by a radio network controller (RNC);
at least one processor configured to:
determine whether received total wideband power (RTWP) of an air interface exceeds a set first congestion threshold value; and
when the RTWP of the air interface exceeds the set first congestion threshold value, down-regulate the target SIR sent by the RNC; and

a transmitter configured to notify, based on the target SIR down-regulated by the at least one processor, a user equipment (UE) to reduce transmit power.

13. The power control apparatus according to claim 12 , wherein:
the transmitter is further configured to, before the receiver receives the target SIR sent by the RNC, send a congestion indication to the RNC, wherein the congestion indication is used for indicating that the RNC is forbidden from up-regulating the target signal-to-interference ratio SIR;
the receiver is further configured to receive the target SIR without being up-regulated that is sent by the RNC; and
the at least one processor is further configured to down-regulate the target SIR without being up-regulated that is sent by the RNC and received by the receiver.

14. The power control apparatus according to claim 12 , wherein the at least one processor is configured to:
set a UE executing a packet switched domain service as a UE on which down-regulation is preferentially performed; and
set a UE without data transmission as a UE on which down-regulation is preferentially performed.

15

Assignees

• Huawei Tech Co Ltd

Inventors

• Liu Qiong
• Wang Chengyi
• Dai Dingzhang
• Lu Xiaohong

Classifications

• H04W52/346

  distributing total power among users or channels · CPC title

• H04W52/30

  using constraints in the total amount of available transmission power · CPC title

• H04W52/241

  taking into account channel quality metrics, e.g. SIR, SNR, CIR or Eb/lo · CPC title

• H04W52/343 Primary

  taking into account loading or congestion level · CPC title

• H04W52/24

  using SIR [Signal to Interference Ratio] or other wireless path parameters · CPC title