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Methods and apparatus for determining, communicating and using information which can be used for interference control purposes

A technology for signalling and receiving signals. It is applied in the directions of multiple use of transmission paths, transmission monitoring, and location diversity. It can solve problems such as inability to accurately control wireless terminals and limit the uplink capacity of wireless systems.

Active Publication Date: 2007-12-19
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, interference is controlled in a distributed manner, which reduces the overall interference level, but does not precisely control those wireless terminals in the system that are the worst interferers
[0004] The present body of interference control method limits the uplink capacity of the wireless system

Method used

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  • Methods and apparatus for determining, communicating and using information which can be used for interference control purposes
  • Methods and apparatus for determining, communicating and using information which can be used for interference control purposes
  • Methods and apparatus for determining, communicating and using information which can be used for interference control purposes

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Embodiment Construction

[0019] Methods and apparatus for collecting, reporting and using information useful for interference control according to the present invention will now be described. The method and apparatus of the present invention are well suited for use in wireless multiple-access (eg, multi-user) communication systems. These systems can be implemented as OFDM systems, CDMA systems or other types of wireless systems where signal interference due to transmissions from one or more transmitters (eg, neighboring base stations) is of concern.

[0020] An exemplary embodiment of the present invention will be described below around the cellular wireless data communication system 100 of the present invention shown in FIG. 1 . Although an exemplary cellular wireless system is used to illustrate the present invention, the scope of the present invention is broader than this example and is generally applicable to many other wireless communication systems.

[0021] In wireless data communication syste...

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Abstract

Methods and apparatus for collecting, measuring, reporting and / or using information which can be used for interference control purposes. Wireless terminals measure signals transmitted from one or more base stations, e.g., base station sector transmitters. The measured signals may be, e.g., beacon signals and / or pilot signals. From the measured signals, the wireless terminal generates one or more gain ratios which provide information about the relative gain of the communications channels from different base station sectors to the wireless terminal. This information represents interference information since it provides information about the signal interference that will be caused by transmissions from other base station sectors relative to transmissions made by the base station sector to which the wireless terminal is attached. Based on the signal energy measurements and relative gains generated from the energy measures, reports are generated in accordance with the invention and sent to one or more base stations.

Description

field of invention [0001] The present invention relates to wireless communication systems, and in particular, to methods and apparatus for collecting, measuring, reporting and / or using information useful for interference control in wireless communication systems. Background technique [0002] In wireless multiple-access communication systems, multiple wireless terminals compete for system resources to communicate with a common receiver on an uplink channel. An example of such a situation is an uplink channel in a cellular radio system, where a plurality of radio terminals all transmit signals to a base station receiver. When there is one wireless terminal transmitting on an uplink channel, it typically causes interference to the entire system (eg, adjacent base station receivers). Since wireless terminals are distributed, how to control the interference generated by their transmissions is a very challenging problem. [0003] Many cellular radio systems employ simple strate...

Claims

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Application Information

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IPC IPC(8): H04B1/00H04B17/40
CPCH04B17/0067H04B2201/70701H04B17/24H04B1/7097H04B17/345H04B17/318H04B1/7103H04B17/005H04B7/022H04B17/0057H04B2201/70702H04L5/023H04W24/10H04B7/00H04B17/40
Inventor R·拉罗厉隽怿S·兰格恩M·斯里尼瓦桑P·汉德
Owner QUALCOMM INC