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Method and appts. for reducing co-channel interference in frame-synchronized wireless communication system

A technology for co-channel interference and communication systems, applied in wireless communication, transmission systems, multi-carrier systems, etc., can solve problems such as reducing efficiency and increasing costs, improving system performance and capacity, reducing co-channel interference, and improving system performance. The effect of capacity

Inactive Publication Date: 2005-11-30
HARINGTON VALVE
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  • Claims
  • Application Information

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Problems solved by technology

This increases the costs associated with the deployment of the system and reduces efficiency

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  • Method and appts. for reducing co-channel interference in frame-synchronized wireless communication system
  • Method and appts. for reducing co-channel interference in frame-synchronized wireless communication system
  • Method and appts. for reducing co-channel interference in frame-synchronized wireless communication system

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Embodiment Construction

[0060] In this description, the preferred embodiments and examples shown are to be understood as typical and not as limitations of the invention.

[0061]A preferred embodiment of the present invention is a method and apparatus for reducing co-channel interference in a frame-based frame-synchronous broadband wireless communication system. The present invention eliminates co-channel interference from selected base stations by transmitting uplink data from selected base stations at predetermined time frames while simultaneously transmitting uplink data from other base stations at different predetermined time frames. In a preferred embodiment, in a TDD system where uplink and downlink frequency reuse efficiencies are different, the present invention implements an uplink / downlink ratio formula that compensates for the difference in multiplexing efficiency. An exemplary frame synchronous wireless communication system for use with the co-channel interference reduction method and app...

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Abstract

The present invention is a method and apparatus for reducing co-channel interference. The present invention includes a powerful means for eliminating co-channel interference from base stations in a wireless communication system. The present co-channel interference reducing method and apparatus utilizes frame synchronization between selected time frames (e.g., odd and even time frames) to reduce co-channel interference. Advantageously, the present invention reduces co-channel interference and, thus, allows robust modulation schemes to operate even at worst case line-of-sight (LoS) interference scenarios of 100%. The present invention can also use an uplink / downlink ratio formula to further improve system capacity (i.e., reduce co-channel interference) in ATDD systems. The present inventive method and apparatus can be used in any type of frame based and frame synchronized communication system.

Description

[0001] The present invention and jointly assigned patent No.6016311 (Gilbert et al., issued on January 18, 2000) "Adaptive Time Division Duplexing Method and Apparatus for Dynamic Bandwidth Allocation within a Wireless Communication System" and patent No.6038455 (Gardner et al., 2000 Issued on March 14) "Reverse Channel Reuse Scheme in a Time Shared Cellular Communication System", these two patents are related to their teachings on wireless communication systems, especially their adaptive TDD technology and frequency reuse technology respectively The teachings are incorporated herein by reference. technical field [0002] The present invention relates to communication systems, and more particularly to methods and devices for reducing co-channel interference in frame synchronous wireless communication systems. Background technique [0003] Wireless communication systems facilitate two-way communication between a plurality of user radio stations or user equipment (fixed or por...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/02H04W16/12H04W16/24
CPCH04W16/10H04W72/082H04W72/0446H04L5/16H04L5/143H04W16/24H04W28/04H04L27/34H04W72/541
Inventor 伊斯莱尔·J·克莱恩西尔登·L·吉尔伯特拉米·哈达尔
Owner HARINGTON VALVE
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