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Cluster multi call connecting method

An access method and group call technology, applied in the wireless field, can solve problems such as group number limitation, channel interference, and lower transmission quality, and achieve the effect of improving utilization

Inactive Publication Date: 2008-11-12
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in fact, in the case of not using smart antennas, this will inevitably lead to great interference between channels in the same time slot, reducing the transmission quality
Currently, TD capacity is limited mainly in the allocation of downlink channels, such as figure 2 As shown, one uplink time slot supports 8 code channels (see Ts1), so that one time slot can be allocated to 8 uplink group call channels for use by 8 different groups in the same cell, while one downlink time slot is only allocated to The downlink group call channel, so that a cell can only support 6 different groups at the same time (Ts0 is used for the system, Ts1 uses 6 code channels to support 6 uplink group call channels, and the 6 time slots of Ts2-Ts7 Support 6 downlink group call channels), the number of groups is limited

Method used

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Embodiment Construction

[0027] The present invention will be described with reference to the drawings.

[0028] In TD-SCDMA technology, when there are two groups A and B in a cell, the DCH channel is used as the downlink channel as an example to describe the group call method of the present invention, including the following steps:

[0029] Step 301: A user of group A initiates a group call establishment request message, which carries the group ID of cluster group A. A user of group B initiates a group call establishment request message, which carries the group ID of group B.

[0030] Step 302: After receiving the group call establishment request message, the trunking system initiates the establishment of uplink and downlink DCH channels for each cell covered by the two groups, as the uplink and downlink group call channels.

[0031] In this example, there is a cell that belongs to the group call area of ​​group A and the group call area of ​​group B. The cell needs to establish downlink group call chann...

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Abstract

This invention provides a cluster multicall access method under TD-SCDMA including: A, when a cluster system sets up a down multicall channel for a cluster, it distributes a time slot for said down nulticall channel, B, distributing an unused frame / sub-frame interval number in the time slot, said frame / sub-frame interval number is the value of mode that the frame / subframe numbers get the value of a mode to the multiplexable maximum user number of a time slot, C, the cluster system sends down the distributed time slot number, the frame / subframe interval number, the multiplexable maximum user numbers of a slot t ousers of said cluster, D, the cluster user computes the received radio frame / subframe interval numbers, when the interval number is the same with that of step C, then data of the distributed time slot in said radio frame.

Description

Technical field [0001] The present invention relates to the field of wireless technology, in particular to a group call access method for clusters. Background technique [0002] The trunking wireless communication system, hereinafter referred to as the trunking system, is a relatively economical and flexible command and dispatch communication system developed in recent years. It is widely used in government agencies, energy and transportation, airport terminals, industrial and mining enterprises, fire police, water conservancy and Military and other units are used to meet the needs of internal communication and communication among various units. [0003] The most basic service provided by the trunking system is the Voice Group Call Service (VGCS), also known as the PTT service. VGCS allows users to establish calls with multiple users in a cluster group that belong to a given service area and have the same group identification (ID). The service area is composed of a number of user...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/28
Inventor 柳光陈德
Owner HUAWEI TECH CO LTD