JPS62159529A - Forced talking channel switching system - Google Patents

Abstract

PURPOSE:To relax the congestion of a signal line between a radio base station and an exchange station caused due to an undesired channel switching by instructing a forced talking channel switching from the exchange station to the radio base station and allowing the radio base station itself to select a mobile terminal equipment optimum to the channel switching. CONSTITUTION:A mobile terminal equipment 4 is connected to a public telephone network 5 via a radio base station 1 under the control of an exchange station 3 and a channel 35 is used in this case. When the exchange station 3 detects that the operating rate of the channel 35 with the radio base station 1 reaches a criterion or over, the exchange station 3 switches a forced talking channel to the remote processor 14 of the radio base station 1 and sends an instruction order (a). The radio base station 1 measures the talking level of the mobile terminal equipment and finds out a mobile terminal equipment having a talking level lower than the level instructed by the exchange station 3, then the talking channel of the mobile terminal equipment 4 is switched and a request order (b) is sent to the talking controller 32 of the exchange station 3. The exchange station 3 discriminates the talking enable when the mobile terminal equipment 4 is switched to the radio base station 2 and switches forcibly the channel from the channel 35 into the channel 36.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mobile radio switching system, and in particular to a system for forced communication channel switching performed when the load on a radio base station is concentrated.

[Conventional technology]

Conventionally, forced communication channel switching for load distribution has not been performed, or even if it has been performed, forced communication channel switching has been performed in accordance with the order of communication paths used by mobile terminals.

[Problem that the invention seeks to solve]

The conventional forced call channel switching described above is performed sequentially according to the order of the call paths being used, and ignores the determination of whether the mobile terminal is suitable for switching to another wireless base station. The problem was that the wireless base station that should be used could not be found, and the signal path between the wireless base station and the switching center would be congested.

[Means for solving problems]

In order to solve these problems, the present invention instructs forced call channel switching from the switching center to the radio base station, and the radio base station itself selects the most suitable mobile terminal for channel switching. .

[Effect]

In the present invention, it is possible to alleviate the congestion in the signal path between the radio base station and the switching center that occurs due to unnecessary channel switching.

〔Example〕

The figure shows a cellular system for explaining an embodiment of the forced call channel switching method according to the present invention. In the figure, 1.2 is a wireless base station, 3 is a switching center, 4 is a mobile terminal,
5 is the public telephone network. Radio base stations 1 and 2 are antennas 1
1, 21, transmitter/receiver 12, 22, communication channel relay device 13° 23 and remote processor 14, 24
It consists of The exchange 3 is composed of a switch 31, a communication control device 32, trunks 33, 34, and communication paths 35 and 36.

Next, the operation in this method will be explained. Mobile terminal 4
is connected to the public telephone network 5 via the radio base station 1 under the control of the switching center 3, and the communication path at this time is the communication path 35.

When the switching center 3 detects that the usage rate of the communication path 35 with the wireless base station 1 has exceeded the reference value, the switching center 3 forces the remote processor 14 of the wireless base station 1 to make a call. A channel switching instruction order a is sent.

The radio base station 1 measures the call level of the mobile terminal, and when it finds a mobile terminal 4 whose call level is lower than the call level instructed by the switching center 3, it issues a call channel switching request order b of the mobile terminal 4.
is sent to the communication control device 32 of the exchange 3. This is done with the expectation that switching the communication channel to another radio base station will increase the communication level.

When the switching center 3 switches the mobile terminal 4 to the wireless base station 2 as in the prior art, it determines that a call is possible and connects the communication path 35.
The communication channel is forcibly switched from to the communication path 36.

〔Effect of the invention〕

As explained above, the present invention reduces the congestion of the signal path between the wireless base station and the switching center due to unnecessary channel switching by selecting the optimal mobile terminal at the wireless base station to perform forced communication channel switching. It has the effect of alleviating the

[Brief explanation of drawings]

The figure is a system diagram showing a cellular system for explaining an embodiment of the forced communication channel switching method according to the present invention. 1.2...Radio base station, 3...Switching center, 4...
...Mobile terminal, 5...Public telephone network, 11. 21.
...Antenna, 12.22...Transmitter/Receiver, 1
3.23... Call channel relay device, 14.24.
...Remote processor, 31...Switching machine, 32
...Communication control device, 33.34...Trunk,
35.36...Call path. Patent Applicant: NEC Corporation Nippon Telecommunication Systems Co., Ltd.

Claims (1)

[Claims] In a forced communication channel switching method performed for load distribution of a radio base station in a mobile radio switching system, a switching center instructs the radio base station to perform forced communication channel switching, and the radio base station itself determines the optimal movement for channel switching. A forced call channel switching method characterized by selecting a terminal.