JPH03259630A - Control station for mobile telephone system - Google Patents

Abstract

PURPOSE:To improve the utilizing efficiency of a channel by detecting a line state of a zone covered by other adjacent control stations so as to adjust the speech channel of its own station zone in a control station for a mobile telephone system in which plural mobile stations are connected. CONSTITUTION:Control stations 1, 3, 5 are provided respectively with antennas 2, 4, 9 and other station zone retrieval section 6, a speech channel control section 8, and a line connection section 7. To the control station 1, n-set of mobile stations 11-13 are connected, to the control station 3, n'-set of mobile stations 14-16 are connected, and to the control station 5, n''-set of mobile stations 17-19 are connected, a zone A is covered by the control station 1, a zone B is covered by the control station 3, and a zone C is covered by the control station 5 respectively. When a value (n) is decreased by DELTAn, idle channels are detected by the other station zone retrieval section 6 of the control stations 3, 5 and shared to the zones B, C. Thus, the number of mobile stations to be connected is increased for both the zones B, C by DELTAn. If no mobile station is resident in the zone A, a maximum of 2N in total of the mobile stations (N is number of channels for the entire system) are connected to the zones B, C.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a control station for a mobile phone system.

[Prior Art] Conventionally, as a control station for this type of car telephone system,
For example, there is one shown in FIG.

In FIG. 3, reference numerals 21, 23, and 25 are control stations equipped with antennas 22, 24, and 26, respectively. The control station 21 controls n mobile stations 27 to 29, and the control station 23 controls n' mobile stations 30 to n'.
32, and the control station 25 covers N'' mobile stations 33 to 35. Each of the control stations 21, 23, and 25 is individually connected to the parent station PSTN.

That is, the control station 2 for this conventional car telephone system
In 1, 23, and 25, the number of communication channels per station arranged on a cell was constant.

[Problems to be solved] In the conventional control station for the car telephone system mentioned above, the number of communication channels is fixed, so depending on the situation in the neighboring zone, even available channels may remain empty, resulting in poor channel utilization efficiency. The disadvantage was that it could not be raised.

The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a control station for a car telephone system that improves channel utilization efficiency.

[Means for Solving the Problems] A control station for a car telephone system according to the present invention includes an other station zone search means for detecting the line status of a zone covered by another control station, and information output from the other station zone search means. The present invention is characterized by comprising a communication channel number control means for increasing/decreasing the number of communication channels in the zone covered by the own station.

[Example] Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a blow diagram showing the configuration of an embodiment of the present invention;
FIG. 2 is a conceptual diagram showing an example of zone arrangement of a car telephone system using the control station of FIG. 1.

Control stations 1 and 3.5 in Fig. 1 are antennas 2.4.9, respectively.
It also includes an other station zone search section 6, a call channel control section 8, and a line connection section 7. The control station l has n mobile stations 11 to 13, and the control station 3 has n" mobile stations 14.
16 are connected to the control station 5, and n'' mobile stations 17 to 19 are connected to the control station 5. In a system with a zone configuration as shown in FIG. Zone C is covered by each control station 5.

Each control station 1, 3.5 is independently connected to the parent station PSTN as in the past.

Here, let the number of channels in the entire system be N, and there are n channels in each of zones A, B, and C.

n and n'' mobile stations are connected, reusing channels in zones B and C, respectively, and in zone A.

If the numbers of channels B and C are the same, the following formula holds true.

1.5-N≧n+n'+n Now, when n decreases by Δn, the other station zone search section 6 of the control stations 3 and 5 detects the empty channel and directs it to zones B and C. Therefore, the number of mobile stations that can be connected to both zones B and C can be increased by Δn.

If there is no mobile station in zone A, the total maximum is 2N.
mobile stations can be connected, increasing channel utilization efficiency.

Comparing this with the conventional example shown in Figure 3, in the example shown in Figure 3, the maximum number of mobile stations that can be connected is 1.5N in total, and if the number of mobile stations connected in any zone decreases, the total number of mobile stations decreases. The number of units will only decrease, and utilization efficiency will not increase.

[Effects of the Invention] As explained above, the present invention detects line conditions in zones covered by other nearby control stations in a control station for a car telephone system, and increases/decreases the number of call channels in the own zone. This has the effect of increasing channel usage efficiency.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a conceptual diagram showing an example of zone arrangement of a car telephone system using a first control station, and FIG. FIG. 1 is a block diagram of a car telephone system using a control station. 1.3, 5: Control station 2, 4.9: Antenna 11 to 19
: Mobile station 6: Other station zone search section 7: Line connection section 8: Call channel control section

Claims (1)

[Claims] In a control station for a car telephone system to which a plurality of mobile stations can be connected, there is an other station zone search means for detecting the line status of a zone covered by another control station, and a self-control station based on the information output from the other station zone search means. 1. A control station for a car telephone system, comprising a call channel number control means for increasing/decreasing the number of call channels in a zone covered by the station.