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Power control method for reduction of interference between relay systems

A relay system and power control technology, applied in radio relay systems, transmission control/equalization, etc., can solve problems such as interference, reception interference of adjacent relay stations, and no cooperative power control of relay stations, so as to improve the quality of link transmission and reception , the effect of reducing interference

Inactive Publication Date: 2008-06-04
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the existing relay (Relay) communication system, there is no coordinated power control between relay stations, and the downlink transmission of the relay station to the mobile station to which it belongs will cause interference to the subscriber station to which the adjacent relay station belongs, thus affecting the reception of the downlink Effect
[0009] Similarly, the transmission from the subscriber station to the relay station in the uplink transmission will also cause interference to the reception of adjacent relay stations

Method used

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  • Power control method for reduction of interference between relay systems
  • Power control method for reduction of interference between relay systems
  • Power control method for reduction of interference between relay systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0135] 1) Embodiment of "Power Control Method Based on Link Quality Measurement"

[0136] a) Step 1: Parameter initialization: (for subscriber station kr to which relay station r belongs) reference transmit power P r，kr _REF

[0137] Main function: The parameter P r，kr _REF performs reference transmission power P r，kr _REF estimate;

[0138] This parameter is used as the reference value of the initial transmit power, and is adjusted by the outer loop power control.

[0139] Function executor: This step is completed by the base station.

[0140] Implementation:

[0141] Step 1: Based on the estimation of the ranging method, when the user station performs initial ranging and periodic ranging, the corresponding reference transmit power P is obtained according to the channel quality r，kr _REF estimate;

[0142] Step 2: Adjustment method, initial reference transmit power P r，kr The _REF value is not accurate enough, and can be adjusted to a suitable precise value by some me...

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Abstract

The invention relates to a power control method for reducing the interference between relay systems, which comprises the following steps: subscriber station measures the link quality information and feeds back the information to an assignment relay station and / or relay station; the base station and / or the relay station estimates the interference of the subscriber station on the basis of the link quality information; the base station and / or the relay station determines the direction and / or step in which the downlink emission power of various neighboring relay stations once again according to the interferential value. By adopting the method disclosed in the invention, the interference between relay stations can be reduced so as to enhance the link transceiving quality from the relay station to the subscriber station.

Description

technical field [0001] The invention relates to a wireless communication system including relay communication, in particular to a power control method for reducing interference between relay systems. Background technique [0002] In a wireless communication system including relay stations, the downlink communication process can be divided into two stages: [0003] 1. In the first stage, the base station first sends information to its affiliated relay station; [0004] 2. In the second stage, the relay station forwards the received information to the terminal to which the relay station belongs; [0005] In the second stage, all relay stations (RS) can choose the same frequency band to provide transmission services for all terminals at the same time. [0006] In the second phase of transmission, if each relay station needs to transmit at the same time and frequency resource, it will cause downlink interference to the subscriber station by adjacent relay stations. [0007] S...

Claims

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Application Information

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IPC IPC(8): H04B7/14H04B7/005
Inventor 郑旭峰单成林恩泽
Owner BEIJING SAMSUNG TELECOM R&D CENT
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