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Downlink power control method in wireless relaying system

A technology of wireless relay and power control, applied in the direction of transmission control/equalization, power management, wireless communication, etc., can solve the problem of downlink interference between cells that cannot be solved by TypeIRelay mobility

Inactive Publication Date: 2013-11-06
SHANGHAI RES CENT FOR WIRELESS COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the current technology of the LTE system cannot solve the problem of inter-cell downlink interference caused by the mobility of the Type I Relay

Method used

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  • Downlink power control method in wireless relaying system
  • Downlink power control method in wireless relaying system

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Experimental program
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Embodiment Construction

[0021] An embodiment of the present invention will now be described with reference to the accompanying drawings.

[0022] A downlink power control method in a wireless relay system, the method comprising the following steps:

[0023] Step 1, the relay RN sets the maximum transmission power Tr allowed by it max and the target average receiving signal-to-noise ratio Γ of users in the cell target ;

[0024] Step 2, the relay RN calculates the transmit power P according to the received interference T :

[0025] Step 3, if the sending power P T Greater than the maximum transmit power Tr allowed by the relay RN max , then the transmit power P of the relay RN T The value is Tr max ; If the sending power P T Less than the maximum transmit power Tr allowed by the relay RN max , then with the sending power P T for downlink transmission.

[0026] If the relay RN receives the high interference indication information sent by the neighboring cell, then the relay RN will reduce th...

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Abstract

The invention relates to a downlink power control method in a wireless relaying system. In the method, the interference level of a neighbor base station measured by a relay in movement or fed back by subordinate user equipment (UE) and the interference level relative to the neighbor base station which is obtained through an X2 interface are utilized to adjust the downlink transmission power dynamically, thus the downlink interferences between the relay in movement and the peripheral cell can be coordinated, the total interference level of the system can be reduced and the aim of increasing the system throughput can be achieved. The method in the invention can be used in the long term evolution-advanced (LTE-A) type I relay system and other wireless multi-hop networks.

Description

technical field [0001] The invention relates to a future mobile communication system-oriented relay transmission technology, in particular to a downlink power control method in a wireless relay system. Background technique [0002] As the mobile communication technology with the greatest development potential and the broadest market prospect in today's communication field, it has ushered in the 3G era. However, in order to solve the problems of shortage of spectrum resources, limited system capacity, and increasing user demands, the International Telecommunication Union (ITU) launched a technical solicitation work for the fourth-generation mobile communication system IMT-Advanced in February 2008. In response to the technical solicitation of ITU-R IMT-Advanced (International MobileTelecommunications-Advanced), as the 3GPP (3th Generation Partnership project), which has formulated the most influential 3G UMTS technical standard in the industry, it was unwilling to be lonely. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/04H04B7/005
Inventor 杨馨徐景张晨璐曾媛
Owner SHANGHAI RES CENT FOR WIRELESS COMM