METHOD AND DEVICE FOR REALIZING POWER CONTROL ON A CONTROL CHANNEL

• US 20100179702A1
• Filed: 02/04/2008
• Published: 07/15/2010
• Est. Priority Date: 02/07/2007
• Status: Active Grant

• Current Assignee: China Academy of Telecom Technology (China Information Communication Technology Group Co. Ltd.)
• Original Assignee: Datang Mobile Communications Equipment Company Limited (China Information Communication Technology Group Co. Ltd.)
• Inventors: Guo, Baojuan, Gao, Xueyuan
• Granted Patent: US 8,768,396 B2
• Time in Patent Office: Days
• US Class Current: 700/286
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/44 in connection with interruption of transmission

Abstract

A method and apparatus for realizing power control on a control channel including measuring the interval between the current control channel transmission and the last control channel transmission; comparing the measured interval with a preset threshold, and if the interval is larger than or equal to the preset threshold, carrying out the current control channel transmission by using the initial transmit power, or controlling the current control channel transmission by using the open loop power control and, otherwise, controlling the current control channel transmission by using the closed loop power control. When the control channel is an uplink control channel, it may be determined whether a compensation for path loss variance should be added based on the closed loop power control according to a related command, so as to enable that the power control can be provided effectively when the control channel transmission is discontinuous.

Claims

1. A method for realizing power control on a control channel, comprising:

measuring an interval between the current control channel transmission and the last control channel transmission;

comparing the interval with a preset threshold; and

determining the power control mode of the current control channel transmission according to the comparison result.

2. The method of claim 1, wherein, the interval is a difference of frame numbers, and the measuring of the interval between the current control channel transmission and the last control channel transmission further comprises:

recording a system frame number corresponding to the last control channel transmission and a system frame number corresponding to the current control channel transmission.

3. The method of claim 1, wherein, the interval is a time interval.

4. The method of claim 1, wherein the determining of the power control mode of the current control channel transmission according to the comparison result further comprises:

if the interval is larger than or equal to the preset threshold, carrying out the current control channel transmission by using an open loop power control or an initial transmit power; and

otherwise, carrying out the current control channel transmission by using a closed loop power control.

5. The method of claim 4, wherein, when the interval is larger than or equal to the preset threshold, the method further comprises:

if the control channel is an uplink control channel, carrying out the power control on the current control channel transmission by using the open loop power control; and

otherwise, carrying out the current control channel transmission by using the initial transmit power.

6. The method of claim 4, wherein, when the control channel is an uplink control channel and carrying out the control channel transmission is performed by using the closed loop power control, the method for power control further comprises:

adding a compensation for path loss variance based on the closed loop power control.

7. The method of claim 1, wherein, the threshold is set by a radio network controller according to correlation of radio control channel.

8. A device for realizing power control on a control channel, comprising:

an interval measuring unit, an interval comparing unit and a power control unit, wherein;

the interval measuring unit is configured to measure an interval between the current control channel transmission and the last control channel transmission;

the interval comparing unit is configured to compare the interval with a threshold stored to obtain a comparison result; and

the power control unit is configured to determine the power control mode of the current control channel transmission according to the comparison result.

9. The device of claim 8, further comprising a threshold setting unit

configured to dynamically adjust the threshold and input the adjustment result to the interval comparing unit, and wherein

the interval comparing unit is further configured to store the adjustment result.

10. The device of claim 8, further comprising path-loss measuring unit configured to measure path loss information of a radio channel and input a compensation for path loss variance obtained into the power control unit;

and wherein

the power control unit is further configured to adjust the transmit power of the control channel according to the compensation for path loss variance.

11. The device of claim 10, further comprising:

a path-loss adding control unit configured to set whether the compensation for path loss variance is added based on the closed loop power control when the power control unit carries out the control channel transmission using the closed loop power control.