A multi-cell joint detection method of the broadcast channel in the time-division duplex system

A technology of time division duplex system and joint detection, applied in code division multiplexing system, transmission system, multiplexing communication and other directions, can solve the problems of high complexity of joint detection algorithm, affecting the system, etc., and achieve low cost , the effect of improving performance

Inactive Publication Date: 2009-09-02
TD TECH COMM TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the complexity of the joint detection algorithm is too high, which affects the entire system, the joint detection of multiple cells mainly reduces the algorithm complexity of the joint detection of multiple cells as much as possible.

Method used

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  • A multi-cell joint detection method of the broadcast channel in the time-division duplex system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Turn on the mobile terminal;

[0030]2. The mobile terminal scans the TDD frequency band it supports according to the previously stored measurement and cell information, or if the measurement and cell information is not stored, it needs to re-establish a multi-cell joint detection list;

[0031] 3. The mobile terminal receives the measurement information in the system broadcast message, or the dedicated control message sent by the radio network controller, or the cell signal detection method at the frequency f 1 If a cell with better quality is found on the network and meets the cell selection criterion S (defined in 3GPP TS 25.304), that is, the received signal code power (RSCP) of the P-CCPCH channel of the cell is greater than a predetermined threshold value, then the cell is selected as Local cell (the protocol requires the terminal to select a cell as a serving cell once it finds that a cell satisfies the cell selection criterion S). And the cell parameter inde...

Embodiment 2

[0039] 1. The mobile terminal moves from cell 1 to the cell boundary, and its periodic same-frequency detection finds a new same-frequency cell 2 with better quality, and the P-CCPCH RSCP of cell 2 meets the cell reselection criterion R (in 3GPP TS 25.304 defined);

[0040] 2. The mobile terminal selects cell 2 to reside in, that is, the received signal code power (RSCP) of the P-CCPCH channel of this cell 2 is greater than a predetermined threshold value, then selects this cell 2 as a local cell, and sets the cell parameter of cell 2 The index (cell_parameter_ID) resides in the multi-cell joint detection list (MCJD cell list), and the threshold value can be built into the user terminal, and can be set by the user terminal to update the MCJD cell list, which contains in the MCJD cell list The cell is the same-frequency cell (including cell 1) in the latest system information block type 11 or type 12 (SIB11 or SIB12) received by cell 1. For details of the system information blo...

Embodiment 3

[0046] 1. The mobile terminal moves from cell 1 to the cell boundary, and its periodic same-frequency detection finds a new same-frequency cell 2 with better quality, and the P-CCPCH RSCP of cell 2 meets the cell reselection criterion R (in 3GPP TS 25.304 defined);

[0047] 2. The mobile terminal selects cell 2 to reside in, and updates the MCJD cell list at the same time, the cells included in it are the same-frequency cells (including cell 1) in the latest SIB11 or SIB12 received in cell 1;

[0048] The following step 3 is to reduce the complexity of the algorithm, you can go directly to step 4.

[0049] 3. If the P-CCPCH RSCP of the cell in the MCJD cell list, or the received signal field strength indication of the general mobile communication system is lower than a predefined threshold Δ P-CCPCH or Δ RSSI , delete these same-frequency cells from the MCJD cell list;

[0050] 4. The mobile terminal obtains the cell parameter index of the cell in the updated MCJD cell list...

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Abstract

The present invention relates to a combination detecting method of the multi-cell of the broadcasting channel in the time division duplex system. The present invention includes the steps as follows to solve the problem of TSO time slot BCH channel interference among the cells: the main public control physics channel of the adjacent cells is estimated by the mobile terminal through the parameters corresponding to the parameter index from cell to cell, and the matched filtering is also performed; the result of the matched filtering is output to a combination detector in parallel; a combination detecting of the cells is performed in the combination detector and the main public control physics channel signals of the present cell are output. The good effect of the present invention resides in that: the interference occurring in the adjacent cells of TSO can be reduced effectively, and the degree of algorithm complexity will not increased by using common combination detecting device, and the power is saved, and the electromagnetic wave coverage of the system is enlarged.

Description

technical field [0001] The invention relates to the field of communication networks, in particular to the field of third-generation wireless communication, and specifically relates to a multi-cell joint detection method for broadcast channels in a time-division duplex system. Background technique [0002] The Chinese meaning of TD-SCDMA is Time Division Synchronous Code Division Multiple Access. This communication technology also belongs to a technical standard of wireless communication. It was first proposed by China and based on this Radio Transmission Technology (RTT) Cooperating with international partners, it completed the TD-SCDMA standard and became a member of the CDMA Time Division Duplex Mode (CDMA TDD) standard. This is a pioneering work in China's mobile communication industry, and it is also China's contribution to the development of the third generation of mobile communication. In competition with the 3G standards proposed by Europe and the United States, TD-SC...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/707H04J13/00H04B1/7105
Inventor 李克沈东栋薛强
Owner TD TECH COMM TECH LTD
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