Uplink power control method and apparatus

• US 10,187,881 B2
• Filed: 04/21/2016
• Issued: 01/22/2019
• Est. Priority Date: 10/24/2013
• 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: Xu, Zhan, Liu, Bo
• Primary Examiner(s): Li, Guang W
• Application Number:
  US15/135,136
• Publication Number:
  US 20160242155A1
• Time in Patent Office: 1,006 Days
• Field of Search: 370329
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/225 Calculation of statistics, e.g. average, variance
• CPC Class Codes: H04W 52/241 taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/00 Wireless channel access

Abstract

An uplink power control method and apparatus are provided. The method is performed by a base station and includes: determining, according to a first quantity of accesses and a second quantity of accesses, whether to adjust a cell-level uplink power parameter, where the first quantity of accesses is a count of times that UEs access a cell of the base station by sending a random access preamble for one time, and the second quantity of accesses is a count of times that the UEs access the cell by sending a random access preamble for at least two times; and adjusting, when determining to adjust the cell-level uplink power parameter, the cell-level uplink power parameter, and sending an adjusted parameter to UE within the coverage area of the cell, so that the UE sends an uplink signal according to the adjusted cell-level uplink power parameter, thereby saving a measurement resource.

Claims

1. An uplink power control method, comprising:

determining, by a base station according to a first quantity a of accesses and a second quantity b of accesses, whether to adjust a cell-level uplink power parameter, wherein the first quantity a of accesses is a count of times that first user equipments (UEs) of a plurality of UEs within a coverage area of a cell of the base station send a random access preamble for one time before accessing the cell, and wherein the second quantity b of accesses is a count of times that second UEs of the plurality of UEs within the coverage area of the cell send a random access preamble for at least two times before accessing the cell, wherein the determining whether to adjust the cell-level uplink power parameter comprises determining, by the base station according to a ratio x between the first quantity a of accesses and the second quantity b of accesses, whether to adjust the cell-level uplink power parameter by;

calculating, by the base station, the ratio x according to the first quantity a of accesses and the second quantity b of accesses, wherein

2. The method according to claim 1, wherein the decreasing the value of the cell-level uplink power parameter comprises:

decreasing, by the base station, the value of the cell-level uplink power parameter by a preset first adjustment step.

3. An uplink power control apparatus, located in a base station, comprising:

a processor; and

a non-transitory computer readable storage medium, wherein the non-transitory computer readable storage medium stores a program to be executed by the processor, the program including instructions for;

determining, according to a first quantity a of accesses and a second quantity b of accesses, whether a cell-level uplink power parameter is to be adjusted, wherein the first quantity a of accesses is a count of times that first user equipments (UEs) of a plurality of UEs within a coverage area of a cell of the base station send a random access preamble for one time before accessing the cell, and wherein the second quantity b of accesses is a count of times that second UEs of the plurality of UEs within the coverage area of the cell send a random access preamble for at least two times before accessing the cell, wherein the instructions for determining whether to adjust the cell-level uplink power parameter include instructions for determining, according to a ratio x between the first quantity a of accesses and the second quantity b of accesses, whether to adjust the cell-level uplink power parameter, by;

calculating, by the base station, the ratio x according to the first quantity a of accesses and the second quantity b of accesses, wherein

4. The apparatus according to claim 3, wherein the value of the cell-level uplink power parameter is decreased by a preset first adjustment step.

5. An uplink power control apparatus, located in a user equipment (UE), comprising:

a processor; and

a non-transitory computer readable storage medium, wherein the non-transitory computer readable storage medium stores a program to be executed by the processor, the program including instructions for;

receiving an adjusted cell-level uplink power parameter sent by abase station, wherein the adjusted cell-level uplink power parameter is sent to the UE within a coverage area of a cell when the base station determines to adjust a cell-level uplink power parameter, and the base station determines, according to a first quantity a of accesses and a second quantity b of accesses, whether to adjust the cell-level uplink power parameter, wherein the first quantity a of accesses is a count of times that first UEs of UEs within the coverage area of the cell of the base station send a random access preamble for onetime before accessing the cell, and wherein the second quantity b of accesses is a count of times that second UEs of the UEs within the coverage area of the cell send a random access preamble for at least two times before accessing the cell, wherein the base station determines whether to adjust the cell-level uplink power parameter according to a ratio x between the first quantity a of accesses and the second quantity b of accesses, whether to adjust the cell-level uplink power parameter by calculating, by the base station, the ratio x according to the first quantity a of accesses and the second quantity b of accesses, wherein

6. The apparatus according to claim 5, wherein the value of the adjusted cell-level uplink power parameter is used as a power for sending the uplink signal.