JPH04124920A - Radio circuit control system - Google Patents

Abstract

PURPOSE:To divide radio channels mutually among radio base stations by grouping the radio channels into plural radio channel groups, and allowing every radio base station to set the priority order of the radio channel groups to be used in its own radio base station, and simultaneously, informing other radio stations in its circumference of this priority order. CONSTITUTION:The radio channels are grouped into plural radio channel groups like A-group, B-group, C-group, D-group,... Every radio base station sets the priority order of the radio channel groups in respect of the radio channels to be used in its own radio base station, and simultaneously, it informs other radio base stations in its circumference of this priority order, and also, every radio base station having been informed sets the priority order of its own radio channel groups so as to use preferentially the radio channel group whose priority order in other radio base stations based on informed contents is low, and informs other radio base stations in its circumference of the priority order of its own radio channel groups.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to mobile communication or personal communication systems in which people communicate while moving with a mobile device such as a mobile phone. The present invention relates to a method of separating radio channels between radio base stations so that interference and the like are less likely to occur.

[Conventional technology: Conventionally, as shown in Fig. 2, this type of system consists of a public communication network including one or more switching centers, and a plurality of wireless base stations connected to the switching centers via wired lines. and one or more mobile devices connected to the wireless base station via a wireless line, and each wireless base station forms a wireless zone.

Radio waves used in each wireless zone generally reach surrounding wireless zones, so if the wireless channels have the same frequency, they will interfere with each other, making communication impossible.

Therefore, if the wireless zones are close or adjacent,
Previously, each wireless zone was designed with a different frequency to use, and wireless base stations with different wireless channels were installed.

[Problem to be solved by the invention] In the above case, since the wireless channels used in each zone are fixedly set at the design and introduction stage, it is difficult to deal flexibly with the addition of base stations and changes in interference conditions. However, there was a drawback that dynamic allocation/operation of wireless channels was not possible.

The aim of the invention is to provide means for overcoming the above-mentioned drawbacks.

[Means for Solving the Problems] The present invention provides wireless channels, for example, group A, group B, group 0,
Group D, etc. are divided into multiple wireless channel groups, and each wireless base station sets the priority order of the wireless channel group used by its own wireless base station, and A feature of this system is that wireless channels are allocated between wireless base stations by notifying other wireless base stations of their priorities.

〔Example〕

FIG. 1 shows an embodiment of the present invention, which includes a public communication network including one or more switching centers, a plurality of wireless base stations connected to the switching center via wired lines, and the wireless base stations Each wireless base station forms a wireless zone.

A wireless line is composed of a plurality of wireless channels on either or both of the frequency and time axis, and the wireless channels are divided into groups A, B, 0, D, etc.
The channels are divided into multiple wireless channel groups.

Each radio base station sets priorities for a group of radio channels for the radio channels used by its own radio base station, notifies other radio base stations in the vicinity of the priorities, and Each base station sets its own wireless channel group priority to preferentially use a wireless channel group with a lower wireless channel group priority of other wireless base stations based on the broadcast content, and Notify stations of their own wireless channel group priorities.

Specifically, for example, the wireless channel group priorities are set as follows.

・Base station 1: Group A, Group B, Group 0, Group D ・Base station 2: Group B, Group 0, Group D, Group A ・Base station 3: Group 0, Group D, Group A, Group B When the base station 4 is added, the following settings are made based on broadcast information of radio channel group priorities from surrounding base stations, allowing flexible handling when adding base stations and changes in interference conditions.

・Base station 4: Group D, Group A, Group B, Group 0 If the above wireless channel group priorities are temporarily notified, dynamic allocation/operation of wireless channels can be performed, and frequency usage efficiency can be improved. do.

〔Effect of the invention〕

According to the present invention, it is possible to flexibly deal with the addition of base stations and changes in interference conditions, and the frequency usage efficiency is also improved.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, and FIG. 2 shows a conventional frequency allocation method. Figure 1 Figure 2

Claims (1)

[Scope of Claims] A public communication network including one or more switching centers, a plurality of wireless base stations connected to the switching center via a wired line, and a plurality of wireless base stations connected to the wireless base station via a wireless line. A radio line control system used in a communication system configured with one or more mobile devices, wherein the radio line is composed of a plurality of radio channels on either or both of the frequency and time axis, and the radio channel For example, group A, group B, group C, group D,
Each radio base station sets priorities for the radio channels used by its own radio base station, and In addition, each radio base station that has received the notification from the other radio base station will broadcast the priority order to other radio base stations, and each radio base station that has received the notification will transmit the priority order to the other radio base station's radio channel group based on the content of the notification. Sets its own wireless channel group priority so as to preferentially use a channel group, broadcasts its own wireless channel group priority to other nearby wireless base stations, and sets the wireless channel group priority. A wireless line control method characterized by: