Method for detecting system self-interference in time division duplex wireless honeycomb communication network

A wireless cellular and communication network technology, applied in the field of detection system self-interference, can solve problems such as the difference in altitude of base stations, difficulty in finding self-interference in time, and achieve the effect of avoiding self-interference

Inactive Publication Date: 2008-04-02
ZTE CORP
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Problems solved by technology

[0004] However, in the actual project network deployment process, once the network planning is unreasonable, it is difficult to find self-interference in time; and in special landform conditions, such as the difference in the altitude of the base station caused by the uneven terrain of the urban area, in this case, and How to avoid self-interference in TDD system

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  • Method for detecting system self-interference in time division duplex wireless honeycomb communication network
  • Method for detecting system self-interference in time division duplex wireless honeycomb communication network
  • Method for detecting system self-interference in time division duplex wireless honeycomb communication network

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Embodiment Construction

[0029] Taking the TD-SCDMA cellular communication system as an example, the implementation scheme of the self-interference detection of the TDD system will be described in detail below.

[0030] The time slot structure of TD-SCDMA is shown in Figure 2 and Figure 3. The basic radio frame is a 10ms frame, and each 10ms radio frame is divided into two 5ms subframes. Each 5ms subframe contains 7 burst time slots and a special time slot. The standard stipulates that time slot 0 is used as the downlink time slot, and time slot 1 is used as the uplink time slot. The adjacent uplink and downlink burst time slots are called service switching points, and the protocol stipulates that each wireless subframe contains two service switching points (see TS25.2215A.1). The first conversion point is located in a special time slot, which consists of a downlink pilot time slot (DwPTS), a guard bandwidth (GP) and an uplink pilot time slot (UpPTS). The length of the guard bandwidth is 96chips, w...

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Abstract

The present invention discloses a method for detecting the system self-interference in the time division duplex wireless cellular communication network, which comprises the steps of: confirming the business area coverage for detecting self-interference; arranging an exclusive transmitting cell in the business area coverage, and other cells are arranged to be receiving cell; arranging a carrier frequency and synchronous measuring frame for all the cells in the business area coverage; arranging time slot in the measuring frame for the transmitting cell in the assigned carrier frequency and at the same time arranging receiving time slot in the measuring frame for all the receiving cells in the assigned carrier frequency; assigning the transmitting time slot to transmit the signal of the cell when the transmitting cell is in the assigned carrier frequency; assigning the receiving time slot in the measuring frame to receive the transmitted signal when the receiving cell is in the assigned carrier frequency; and judging whether a system self-interference generates between the transmitting cell and the receiving cell according to whether a transmitted signal is received by the receiving cell in the receiving time slot. The self-interference of the TDD system can be effectively detected with the method of the invention.

Description

technical field [0001] The invention relates to a method for detecting system self-interference, in particular to a method for detecting system self-interference in a Time Division Duplex (TDD, Time Division Duplex) wireless cellular communication network. Background technique [0002] The so-called Time Division Multiple Access (TDMA, Time Division Multiple Access) system refers to distinguishing voice and data information of different users through different time slots, so as to avoid interference between different users. For the time division multiple access system adopting the TDD communication mode, the uplink and downlink share the same frequency resources, and a large enough guard time slot is reserved between the uplink and downlink time slots to avoid air transmission delay between the uplink and downlink time slots. The resulting crosstalk is shown in Figure 1. TDD-based time division multiple access wireless cellular communication network requires strict network ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04B17/00H04B7/26H04J13/02H04W24/02H04W24/08
Inventor 吴岩巍
Owner ZTE CORP
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