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Power control in a wireless system having multiple interfering communication resources

一种通信资源、功率控制的技术，应用在传输的控制/均衡、功率管理、无线通信等方向，达到稳定表现、延长电池待机时间、降低功耗成本的效果

Inactive Publication Date: 2009-05-06
TELEFON AB LM ERICSSON (PUBL)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] While some prior art schemes may have very satisfactory performance in specific situations, conventional power / rate control schemes generally still leave considerable room for improvement

Method used

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  • Power control in a wireless system having multiple interfering communication resources
  • Power control in a wireless system having multiple interfering communication resources
  • Power control in a wireless system having multiple interfering communication resources

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Embodiment Construction

[0064] Throughout the drawings, the same reference signs will be used for corresponding or similar parts. introduction

[0065] The present invention is generally directed to wireless communication systems having multiple interfering communication resources, typically radio transmission resources.

[0066] Communication resources may eg correspond to multiple interfering links between respective transmitter-receiver node pairs, as shown in FIG. 1 .

[0067] In Figure 1, a number I of links are considered between I transmitter-receiver pairs, where the individual links are assumed to interfere with each other. parameter P i is the transmitter TX i transmit power, N i is the receiver RX i The noise experienced, G is the path gain matrix, where G ij is the path gain from transmitter i to receiver j.

[0068] But the present invention is not limited thereto, but can be practically applied in many different scenarios and applications. For example, the aforementioned multipl...

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Abstract

A wireless communication system having multiple interfering communication resources is considered. A power control procedure is based on assigning (Sl) a common control parameter to the considered communication resources, and using the control parameter together with a unique power control condition (S2) for determining the individual transmit power parameters of the communication resources. In particular, the idea is to determine, for each one of at least a subset of said communication resources, an individual transmit power parameter based on a power control condition implying that the total received power divided with the path gam of the communication resource should correspond to the common control parameter (S2). The determined transmit power parameters are then used for controlling (S3) the transmit powers of the corresponding communication resources. By using the proposed power control condition when determining the transmit power parameters, and then adapting the transmit data rates according to the resulting link quality, it is possible to maximize aggregate data rate for any given amount of total invested power.

Description

technical field [0001] The present invention relates generally to communications in wireless systems, and in particular to novel strategies for controlling transmission parameters, such as transmit power parameters, in wireless systems with multiple interfering communication resources. Background technique [0002] Control and adaptation of transmission parameters generally includes issues such as power control and rate adaptation. [0003] Power control is used in many wireless systems, such as cellular systems, to enable "efficient" communication without consuming unnecessary power resources. [0004] A number of different power control mechanisms have been proposed. A good overview is given in Reference [1], where existing power control methods are divided into two categories, fixed and variable rate power control. [0005] Most power control schemes control SIR (Signal to Interference Ratio) or CIR (Carrier to Interference Ratio) at some target value. [0006] Early w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005
CPCH04W52/367H04W52/242H04W52/225H04W52/26H04W52/343H04W52/267H04W52/265
Inventor P·拉森
Owner TELEFON AB LM ERICSSON (PUBL)
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