Method for improving speaking quality of centreless multi-channel dress selection mobile communication system

Abstract

This invention discloses a method for improving session quality of a centerless multi-channel address-selection mobile communication system including the following steps: storing an inter-call signaling data list, processing the list, modifying a channel search collating list and applying it and applying a random number pointer method to search for and select idle channels used in the following four work states on the calling station: starting call after a session time limit after switching-on, starting the call in the limit of session time or immediately starting the call when re-switching-on within the time limit, starting the call immediately after the limit time when re-switching-on and the master station starts set calls, some steps are different. The last step of the fourth state is to check the calling number and the called number in the inter-call signaling data list to see if they are the user numbers in a same set belonging to this calling station.

Description

technical field [0001] The present invention relates to a system that connects users through a two-way wireless communication link of a mobile wireless system, and uses a selection device controlled by a stored program to provide special services to users, especially relates to a non-centered multi-channel address selection mobile communication system that improves call quality method. Background technique [0002] The centerless multi-channel site selection mobile communication system conforms to the national standard GB 15160 "Centerless Multi-Channel Site Selection Mobile Communication System System". There is no switching control center for centralized control, and the wireless communication is set by each mobile station or fixed station separately. Decentralized control of links. This mobile communication system adopts a multi-channel sharing method, and sets the communication frequency band as S shared channels at certain frequency intervals. 1 ,... f S-1 , f S , w...

AI Technical Summary

Problems solved by technology

[0003] In the above process, the criterion for the calling station to find and judge an idle channel is only whether the carrier level received on the channel is lower than the set threshold level for the set duration, which will affect the communication quality

One is to generate mutual crosstalk. While the calling station is searching for an idle channel, other stations are in the process of searching for an idle channel at the same time; even a selective call signaling has been sent to the called station, but the called station has not yet responded; Or the group is in the conversation interval of the idle channel searched by the calling station, that is, neither party in the communication has pressed the PTT button, and the carrier level received in this channel is also lower than the set duration for the set duration Threshold level; In addition, other stations talk to or group on the idle channel searched by the calling station, but the distance is far away, and the carrier level received in this channel is also lower than the set duration for the set duration. However, when two-way communication is realized, other radio pairs or groups that are talking on the channel are actually close to or have moved close to the calling station or the called station; in the above cases, the calling station will The occupied communication channel is misjudged as an idle channel, so that the two groups of radio stations occupy the same communication channel for communication, resulting in mutual crosstalk; the second is to increase the call establishment time, because the calling station has to go through the set time when searching for and judging the idle channel. Duration, especially when the channel utilization rate is relatively high, it takes a long time to search for an idle channel; the third is to affect the call-through rate of the whole group of users. When some members of the same group are communicating on the communication channel, they will receive The group call signaling sent on the control channel is not received, so the calling station cannot call the whole group of users