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Method for selecting channel and communication system

A channel selection and logical channel technology, applied in the field of communication, can solve problems such as large interference, affect system performance, and cannot explain equipment, and achieve the effect of reducing interference and improving system performance.

Inactive Publication Date: 2013-01-02
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] There are two main reasons why the device needs to create a new BP: (1) There is no other piconet working within the receiving range of the device; (2) There is a working piconet within the receiving range of the device, but the device cannot access
For the first reason, there are no other MB-OFDM devices (piconet devices) within the receiving range, which does not mean that the device will not be interfered by other MB-OFDM devices outside the range; for the second reason, it must be There will be interference from other MB-OFDM equipment
Therefore, in the prior art, simple logical channel selection based on priority may cause great interference between devices in adjacent piconets and affect system performance

Method used

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  • Method for selecting channel and communication system
  • Method for selecting channel and communication system
  • Method for selecting channel and communication system

Examples

Experimental program
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Embodiment 1

[0038] In Embodiment 1, selecting a logical channel through the above steps can reduce interference between devices in adjacent piconets and improve system performance.

[0039] The following content is first introduced based on logical channel selection under the ECMA-368 standard.

[0040] see figure 2 , is a flow chart of the second channel selection method in the embodiment of the present invention, including steps:

[0041] Step 201, detecting the interference level of the working subband of each logical channel according to the frequency hopping period, and obtaining the detection result;

[0042]When the device decides to create a new BP, it first detects the interference level on the working subbands of each logical channel. In this embodiment, the detection of the interference level uses a matched filter detection method. Considering the frequency hopping pattern of the logical channel, the detection takes one OFDM symbol time as the unit, and the detection sequenc...

Embodiment 2

[0107] The second embodiment introduces logical channel selection under the ECMA-368 standard. For the UWB standard proposed by China, the technical solution of the embodiment of the present invention is also applicable.

[0108] see Figure 4 , is a flow chart of the third channel selection method in the embodiment of the present invention, including steps:

[0109] Step 401, detecting the interference level of the working sub-band of each logical channel according to the frequency hopping period, and obtaining the detection result;

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Abstract

The embodiment of the invention discloses a method for selecting a channel and a communication system. The method for selecting a channel comprises the following steps: acquiring interference electrical levels of working sub-bands of all logic channels; comparing the magnitude of the interference electrical levels of the working sub-bands of all the logic channels; and selecting the logic channelwith the small interference electrical level of the working sub-band as the logic channel for sending a newly created beacon period. The communication system comprises an acquisition unit, a processing unit and a selecting unit, wherein the acquisition unit is used for acquiring the interference electrical levels of the working sub-bands of all logic channels; the processing unit is used for comparing the magnitude of the interference electrical levels acquired by the acquisition unit; and the selecting unit is used for selecting the logic channel with the small interference electrical level of the working sub-band as the logic channel for sending the newly created beacon period according to a compared result of the processing unit. The technical scheme of the embodiment of the invention can reduce the interference between the equipment of adjacent piconets and improve the system performance.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a channel selection method and a communication system. Background technique [0002] As a new generation of wireless communication technology, ultra wideband (UWB) is a key technology for realizing high-speed wireless personal area network (WPAN) multimedia transmission. There are two main methods of UWB technology at present: multi-band orthogonal frequency division multiplexing (multi-band orthogonal frequency division multiplexing, MB-OFDM) and direct-sequence code division multiple access (direct-sequence code division multiple access, DS-CDMA). The WiMedia UWB (Wireless Multimedia Ultra Wideband) platform based on MB-OFDM has been the first commercial UWB standard in the world, and the ECMA-368 standard and the ECMA-369 standard have been produced so far. At present, China is also formulating its own UWB standard. [0003] For MB-OFDM-UWB technology, time-frequency c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/715H04L27/26H04B1/7163
Inventor 刘培邹卫霞陈凌君邱晶
Owner HUAWEI TECH CO LTD