Method for interrupting conversation transmitting terminal in narrow-band wireless digital communication system

A digital communication system and transmitter technology, applied in the field of communication, can solve problems such as sound quality degradation and voice damage, and achieve the effects of improving efficiency, easy decoding and matching, and easy decoding and matching.

Active Publication Date: 2018-09-21
FUJIAN KIRISUN ELECTRONICS
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AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for interrupting a call transmitting end in a narrowband wireless digital communication system, the main purpose of which is to overcome the problems that the existing method for interrupting a call transmitting end will cause damage to voice and lower sound quality

Method used

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  • Method for interrupting conversation transmitting terminal in narrow-band wireless digital communication system

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Embodiment Construction

[0013] refer to figure 1 . A method for interrupting a call transmitter in a narrowband wireless digital communication system, carried out based on a time division multiple access system of 2 time slots, comprising the following steps:

[0014] (1) pre-set the synchronous word of the interrupt request of a plurality of priority levels in each speech superframe, each speech superframe is made up of six speech frames such as A, B, C, D, E and F frame, wherein The middle of the A frame is a voice synchronization word, and the synchronization word of the interrupt request is set between the E frame and the F frame. The time length of the voice superframe is 360ms, the size of the synchronization word of the interrupt request is 48bit, and the time length is 5ms. The synchronization word of the interrupt request designed in this step is only 5ms, leaving enough time for switching between transmission and reception.

[0015] (2) Transmitting terminal MS1 transmits voice, and rece...

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Abstract

A method for interrupting a conversation transmitting terminal in a narrow-band wireless digital communication system is performed based on a 2-time slot TDMA (Time Division Multiple Access) system and comprises the following steps: (1) presetting a plurality of synchronization words of interrupt requests with priority levels in each voice superframe, wherein the each voice superframe consists ofsix voice frames, i.e., an A frame, a B frame, a C frame, a D frame, an E frame and an F frame, the middle of the A frame is a voice synchronization word, the synchronization words of the interrupt requests are arranged between the E frame and the F frame; (2) when a transmitting terminal transmits voice and a receiving terminal waits to receive the voice transmitted by the transmitting terminal,switching to a receiving mode at one time slot after the E frame of the each voice superframe and trying to decode and match the synchronization words of the interrupt requests, and switching back toa transmitting mode when one time slot after the E frame is near the end no matter whether the synchronization words of the interrupt requests are matched successfully or not; and (3) interrupting thecalling of the transmitting terminal to perform normal transmission if a voice or data service is initiated when the receiving terminal is in a receiving state.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for interrupting a call transmitting end in a narrowband wireless digital communication system. Background technique [0002] In a narrowband communication system, when a voice call is active on the current channel, if there is a higher-priority service to be used on the current channel, it is necessary to interrupt the active and lower-priority call to make the lower-priority call Priority calls stop transmitting and release channel resources. At present, there is a method of stealing voice frames (that is, when transmitting voice, at the position where a certain voice frame is transmitted, it is used to receive the waiting interruption request, and after this position is transferred to continue transmitting voice) to interrupt the call. However, the disadvantage of this method is that it will cause damage to the voice and decrease the sound quality. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12H04W76/36H04J3/06
CPCH04J3/0602H04W76/36H04W72/569
Inventor 赖镜灵刘中文付文良
Owner FUJIAN KIRISUN ELECTRONICS
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