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A Method to Solve Interfering Crosstalk in Narrowband Digital Trunking System

A digital trunking system, narrowband technology, applied in the field of communication, can solve the problems of wrong crosstalk, not judging the source of the signal, etc., to avoid interference, good business perception, and ensure the effect of call quality

Active Publication Date: 2021-10-12
THE FIRST RES INST OF MIN OF PUBLIC SECURITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] As long as the current base station mechanism assigns the main speaking right, it will continue to receive and forward signals in the uplink without judging the source of the signal. If the signal from a non-speaking right terminal is wrong, it may be wrongly forwarded and cause crosstalk.

Method used

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  • A Method to Solve Interfering Crosstalk in Narrowband Digital Trunking System
  • A Method to Solve Interfering Crosstalk in Narrowband Digital Trunking System
  • A Method to Solve Interfering Crosstalk in Narrowband Digital Trunking System

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment provides a method for solving interference crosstalk in a narrowband digital trunking system, and the specific process is as follows:

[0042] The terminal registers under the base station;

[0043] The terminal sends a speaking right application P_MAINT (MK=MK_PTTON) under the base station to apply for PTT; after the base station authorizes, the base station locally saves the terminal number of the speaking right application this time, and sends the authorization result to the terminal. Send group call maintenance information P_PROTECT (PK=TX_GR);

[0044] The terminal that receives the result of the right to speak authorization sends continuous voice superframes on the traffic channel, and the traffic channel forwards the voice superframes to the local downlink channel; after receiving the voice superframes through the corresponding traffic channel, the base station judges whether it is the calling party station; such as image 3 shown;

[0045] Whe...

Embodiment 2

[0061] This example is intended to provide a more specific example based on the method of Example 1. The specific process is as follows:

[0062] 1. Terminal A registers under base station B;

[0063] 2. Terminal A sends a speaking right application P_MAINT (MK=MK_PTTON) under base station B to apply for PTT authorization; after base station B authorizes, the user number that locally saves the speaking right application is the number of terminal A, and sends the authorization result to Terminal A sends group call maintenance information P_PROTECT (PK=TX_GR) at the downlink interval of the traffic channel at the same time; Terminal A receiving the right to speak authorization sends continuous voice superframes on the traffic channel;

[0064] 3. After the base station B receives the continuous voice superframe on the corresponding traffic channel, if it checks that the user number of the right to speak application user number stored locally and the user number in the group cal...

Embodiment 3

[0067] This embodiment is intended to provide another more specific example based on the method of Embodiment 1. The specific process is as follows:

[0068] 1. Terminal A and terminal B register under base station B.

[0069] 2. Terminal A sends a speaking right application P_MAINT (MK=MK_PTTON) under base station B; after base station B authorizes, it locally saves the user number of the speaking right application as terminal A, and sends the authorization to terminal A, and at the same time Send group call maintenance information P_PROTECT(TX_GR) at downlink intervals;

[0070] 3. Terminal A, which has received the speech right authorization, sends continuous voice superframes on the traffic channel; during the speech right authorization period of terminal A, for some reason, terminal B also sends voice superframes on the traffic channel; After receiving consecutive voice superframes transmitted by terminal B on the corresponding traffic channel, it is checked that the us...

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Abstract

The invention discloses a method for solving interference and crosstalk in a narrowband digital trunking system, which plays a good role in optimizing the existing PDT network, can provide good service perception, and can avoid interference and crosstalk while ensuring high-quality voice call quality. improve the quality of the network system.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for solving interference crosstalk of a narrowband digital trunking system. Background technique [0002] The PDT standard is a narrowband trunking communication standard with China's independent intellectual property rights. It focuses on the future development direction of digital intercom technology and can meet the needs of most trunking communication industry users. The PDT standard fully considers China's national conditions, draws on mature international standard technologies and carries out innovative designs, and follows the five principles of high cost performance, security and confidentiality, regional system, scalability and backward compatibility, and effectively solves the problem of various emergency communication networks. The problem of converged communication. [0003] The PDT system uses frequency and time division methods to divide channels. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/08H04W12/06H04W40/16H04W84/08
CPCH04W4/08H04W12/06H04W40/16H04W84/08
Inventor 朱振荣张禹强鲜柯孙兵兵
Owner THE FIRST RES INST OF MIN OF PUBLIC SECURITY