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Bypassing method for co-channel interference between base stations, control apparatus and base station device

A co-frequency interference, inter-base station technology, applied in the direction of selection device, communication between multiple stations, radio/induction link selection arrangement, etc. the effect of interference

Active Publication Date: 2009-02-04
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In view of this, the object of the present invention is to provide a method for avoiding co-channel interference between base stations, a control device and base station equipment to solve the problem that co-channel interference between base stations cannot be eliminated in the current TDD system

Method used

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  • Bypassing method for co-channel interference between base stations, control apparatus and base station device
  • Bypassing method for co-channel interference between base stations, control apparatus and base station device
  • Bypassing method for co-channel interference between base stations, control apparatus and base station device

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Embodiment Construction

[0041] The scheduling module of the MAC (Medium Access Control) layer of the base station maps each channel to symbols corresponding to each time slot and frequency in the uplink time slot, and sends it to the user through the UL_MAP channel (uplink mapping channel) terminal. The terminal receives the scheduling information of the UL_MAP channel, and sends service data on the corresponding channel.

[0042] Due to the existing interference power between any two base stations, the interference power will further increase due to the increase of the number of interfering base stations falling into it as the distance increases.

[0043] In order to solve the same-frequency interference problem between base stations in the 802.16 TDD system, the present invention discloses a method and device for avoiding same-frequency interference between base stations. Symbol, the symbol is excluded from resource allocation. In this way, co-channel interference between base stations can be avo...

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Abstract

The invention discloses an method for evading co-channel interference between basic stations, which includes following steps: periodically measures co-channel interference power of each up-link subchannel; classifies the codes in the time slot whose interference power exceeds the preset threshold in the protection code field; then makes the codes outside the protection code field as the adjusting and distributing resource when adjusting and distributing resources. The invention also discloses a control device which includes a measuring unit which is used for measuring co-channel interference power of each up-link subchannel; an identifying unit which is used for identifying the codes corresponding to the time slot whose interference power exceeds the preset threshold; and an adjusting and distributing unit which is used for resource adjusting and distributing. Meanwhile, the invention also discloses a basic station device. Through calculating the interference power of each time slot, the invention identifies the codes corresponding to the time slot whose interference power exceeds the preset threshold as the unusable resource and does not regards the codes as the adjusting and distributing resource; therefore can evade the co-channel interference from other basic stations.

Description

technical field [0001] The present invention relates to the technical field of communication system parameter detection and signal processing, and more specifically, relates to a method for avoiding co-channel interference between base stations, a control device and base station equipment. Background technique [0002] The IEEE802.16 protocol defines a broadband wireless access system based on OFDMA (Orthogonal Frequency Division Multiple Access). With the evolution of the system, it is now able to support mobile and large-scale networking. The 802.16 protocol supports two duplex modes, FDD (Frequency Division Duplex) and TDD (Time Division Duplex, time division duplex). Among them, when the TDD duplex mode supports large-scale continuous coverage networking, the downlink transmission of the base station The signal, after a certain distance of propagation, will be delayed to the uplink time slot, causing interference to the uplink signal. [0003] Taking 802.16e TDD as an e...

Claims

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Application Information

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IPC IPC(8): H04Q7/36H04Q7/38H04B7/26
Inventor 秦飞
Owner DATANG MOBILE COMM EQUIP CO LTD
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