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Interference control via selective blanking/attenuation of interfering transmissions

A technology of blanking and transmission power, which is applied in the field of communication and can solve problems such as reducing performance

Active Publication Date: 2010-06-02
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for some users who are disadvantaged by high levels of interference, randomized inter-sector interference may still severely degrade performance

Method used

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  • Interference control via selective blanking/attenuation of interfering transmissions
  • Interference control via selective blanking/attenuation of interfering transmissions
  • Interference control via selective blanking/attenuation of interfering transmissions

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Embodiment Construction

[0019] The word "exemplary" is used herein to mean "serving as an example, illustration or illustration". Any embodiment or design described herein as "exemplary" is not to be construed as preferred or advantageous over other embodiments or designs.

[0020] figure 1 A wireless multiple-access communication system 100 is shown. System 100 includes a plurality of base stations 110 that support communication with a plurality of wireless terminals 120 . A base station is a fixed station used to communicate with terminals, and may also be called an access point, Node B, or some other terminology. Terminals 120 are generally dispersed throughout the system, and each terminal may be fixed or mobile. A terminal may also be called a mobile station, user equipment (UE), a wireless communication device or some other terminology. At any given moment, each terminal can communicate with one or more base stations via forward and reverse links. The forward link (or downlink) refers to t...

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Abstract

Inter-sector interference for a target user in a sector may be controlled by selectively blanking or attenuating transmit powers for interfering users in neighboring sectors whenever their transmissions collide. The sector provides the frequency hopping (FH) sequence or subband usage for the target user to the neighboring sectors. Each neighboring sector uses the target user's FH sequence to forma blanking pattern. Each neighboring sector then either blanks or reduces transmit power for each subband in its blanking pattern. Each user in each neighboring sector receives either (1) punctured symbols for subbands in the blanking pattern, if blanking is performed, or (2) lower energy symbols for these subbands, if attenuation is performed. In any case, the target user and each neighboring user may process their received symbols in the normal manner and do not need to be informed of the blanking / attenuation.

Description

field of invention [0001] The present invention relates generally to communications, and more particularly to techniques for controlling interference in wireless communication systems. technical background [0002] In a frequency hopping (FH) communication system, data is transmitted on different frequency subbands in different time intervals, and these time intervals may be called "frequency hopping periods". These subbands may be provided by Orthogonal Frequency Division Multiplexing (OFDM), other multi-carrier modulation techniques, or some other means. With frequency hopping, data transmission hops from one subband to another in a pseudo-random manner. This hopping achieves frequency diversity and makes the data more resistant to harmful path effects such as narrowband interference, blocking, fading, and so on. [0003] An Orthogonal Frequency Division Multiple Access (OFDMA) system employs OFDM and can support multiple users. For a frequency hopping OFDMA (FH-OFDMA) ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/713H04W52/24
CPCH04B1/715H04W52/243H04B2001/7154Y02B60/50H04W52/38H04W52/44H04B1/10H04J11/0023Y02D30/70
Inventor 爱德华·哈里森·蒂格
Owner QUALCOMM INC