Substrate conveying device
a conveying device and substation technology, applied in the field of wireless communications, can solve the problems of increasing the battery consumption the inability of the base station to receive the transmission signal of the mobile station, etc., and achieve the effect of improving the reliability of the mobile station located at the cell edge and reducing inter-cell interferen
Inactive Publication Date: 2011-05-19
LG ELECTRONICS INC
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Benefits of technology
The present invention provides a method and apparatus for controlling uplink transmission power in a wireless communication system. This method involves obtaining interference indicators from a base station, determining an uplink transmission power level for a frequency partition based on the interference indicator, and controlling the uplink transmission power based on the determined power level. This method can reduce inter-cell interference and improve reliability of mobile stations located in cell edge. The invention also provides interference information for uplink transmission power control.
Problems solved by technology
If transmission power is too weak in uplink transmission, the base station cannot receive a transmission signal of a mobile station.
On the other hand, if the transmission power is too strong, the transmission signal of the mobile station may act as interference to a transmission signal of another mobile station, which increases battery consumption of the mobile station.
Method used
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[0022]FIG. 1 shows a wireless communication system.
[0023]Referring to FIG. 1, a wireless communication system 10 includes at least one base station (BS) 11. Respective BSs 11 provide communication services to specific geographical regions (generally referred to as cells) 15a, 15b, and 15c. The cell can be divided into a plurality of regions, each of which is referred to as a sector. The BS 11 is generally a fixed station that communicates with a mobile station (MS) 12 and may be referred to as another terminology, such as an evolved node-B (eNB), a base transceiver system (BTS), an access point, an access network (AN), etc. The BS 11 can perform functions such as connectivity with the MS 12, management, control, resource allocation, etc.
[0024]The MS 12 may be fixed or mobile, and may be referred to as another terminology, such as a user equipment (UE), a user terminal (UT), a subscriber station (SS), a wireless device, a personal digital assistant (PDA), a wireless modem, a handheld...
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A method for controlling uplink transmission power of a mobile station (MS) in a wireless communication system is provided. The method includes: obtaining a plurality of interference indicators indicating uplink interference from a base station (BS), wherein a full bandwidth is divided into a plurality of frequency partitions, and the plurality of interference indicators respectively correspond to the plurality of frequency partitions; determining an uplink transmission power level of a frequency partition corresponding to an interference indicator selected from the plurality of interference indicators on the basis of the selected interference indicator; and controlling the uplink transmission power on the basis of the uplink transmission power level. Accordingly, inter-cell interference can be reduced, and reliability of an MS located in a cell edge can be improved.
Description
TECHNICAL FIELD[0001]The present invention relates to wireless communications, and more particularly, to a method for controlling uplink transmission power by a mobile station in a wireless communication system, and the mobile station using the method.BACKGROUND ART[0002]A wireless communication system needs to control uplink transmission power. This is to regulate a magnitude of a reception signal of a base station to a proper level. If transmission power is too weak in uplink transmission, the base station cannot receive a transmission signal of a mobile station. On the other hand, if the transmission power is too strong, the transmission signal of the mobile station may act as interference to a transmission signal of another mobile station, which increases battery consumption of the mobile station. When the magnitude of the reception signal is maintained to the proper level by controlling the uplink transmission power, unnecessary power consumption of the mobile station can be av...
Claims
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IPC IPC(8): H04W52/10
CPCH04W52/146Y02B60/50H04W52/42H04W52/242
Inventor KIM, DONG CHEOLNOH, MIN SEOKKWON, YEONG HYEONKWAK, JIN SAMMOON, SUNG HOHAN, SEUNG HEELEE, HYUN WOO
Owner LG ELECTRONICS INC