Wireless communication device, interference source estimation method and channel selection method

• US 20050157740A1
• Filed: 08/12/2004
• Published: 07/21/2005
• Est. Priority Date: 01/07/2004
• Status: Abandoned Application

• Current Assignee: Uniden Corporation (Cornwall Capital Management LP)
• Original Assignee: Uniden Corporation (Cornwall Capital Management LP)
• Inventors: Sato, Shigeo
• Application Number:
  US10/916,750
• Publication Number:
  US 20050157740A1
• Time in Patent Office: Days
• US Class Current: 370/431
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal

Abstract

An object of the present invention is to reduce radio wave interference between a wireless communication devices and an interference source that is present in an interference area of the wireless communication device by estimating the interference source. In order to achieve this object, the wireless communication device according to the present invention is a wireless communication device that performs wireless communications by selecting any one channel among a plurality of pre-established channels, comprising: a judgment unit that judges whether or not an interference source, which radiates interfering radio waves in a frequency band contained in a bandwidth that is wider than the frequency bandwidth within which the plurality of channels is distributed, is present; an estimation unit that estimates the interference source by analyzing the frequency spectrum of the interfering radio waves; and a channel selection unit that makes a channel selection such that the priority ranking of the channel containing the frequency of the interfering radio waves is low among the plurality of channels.

Claims

1. A wireless communication device that performs wireless communications by selecting any one channel among a plurality of pre-established channels, comprising:

a judgment unit that judges whether an interference source, which radiates interfering radio waves in a frequency band contained in a bandwidth that is wider than the frequency bandwidth within which the plurality of channels is distributed, is present;

an estimation unit that estimates the interference source by analyzing the frequency spectrum of the interfering radio waves; and

a channel selection unit that makes a channel selection such that the priority ranking of the channel containing the frequency of the interfering radio waves is low among the plurality of channels.

2. An interference source estimation method for estimating an interference source radiating interfering radio waves in at least any channel among a pre-established plurality of channels, comprising the steps of:

judging whether or not an interference source, which radiates interfering radio waves in a frequency band contained in a bandwidth that is wider than the frequency bandwidth within which the plurality of channels is distributed, is present; and

estimating the interference source by analyzing the frequency spectrum of the interfering radio waves when it is judged that the interfering radio waves are present.

3. A channel selection method that selects a channel for performing wireless communications among a pre-established plurality of channels, comprising the steps of:

judging whether or not an interference source, which radiates interfering radio waves in a frequency band contained in a bandwidth that is wider than the frequency bandwidth within which the plurality of channels is distributed, is present;

estimating the interference source by analyzing the frequency spectrum of the interfering radio waves when it is judged that the interfering radio waves are present; and

making a channel selection such that the priority ranking of the channel containing the frequency of the interfering radio waves is low among the plurality of channels.