JPH0197026A - Radio calling system - Google Patents

Abstract

PURPOSE:To economically realize a wide area service by providing a means providing plural personal identification numbers to a mobile receiver and registering or changing a radio in-zone of a mobile receiver by the communication from the mobile receiver to a central controller. CONSTITUTION:A receiver carrier registers the service area in-zone from a telephone set 1 to the central controller 3 and only a receiver in existence in each area is called by a radio base station. Thus, the number of receives called by all service areas is increased considerably. Moreover, plural personal identification numbers are given to one set of mobile receiver and a different receiver and personal identification number is provided at every service area or service area group.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a radio paging system in which a service area is constituted by a plurality of M411 zones.

[Conventional technology]

Conventionally, when providing services to a wide area using a radio paging system such as a pager,
A method is adopted in which a large number of relatively small-scale wireless zones are established with a wireless base station at the core, and the entire service area is configured by a collection of these wireless zones.

When a mobile receiver within a service area is called, the call is made from radio base stations in all radio zones.

[Problem that the invention seeks to solve]

As described above, in the conventional radio paging system, when providing service in a wide area, it was necessary to install a large number of radio base stations in each small radio zone that constitutes the service area.

Then, as the number of receivers accommodated in the system increases, 1y,
When the carrying capacity is exceeded, it becomes necessary to install the same number of wireless base stations with different frequencies, which poses a problem in that base station costs become high.

SUMMARY OF THE INVENTION In view of these conventional problems, it is an object of the present invention to provide a wireless paging system that can economically provide wide area services.

[Means for solving the problem rIIj] According to the present invention, the above-mentioned object is achieved by the means described in 11KB of the patent claim.

That is, the present invention provides a means for assigning a plurality of identification numbers to a mobile receiver, a means for storing information regarding the mobile receiver, and a means for registering or changing the radio zone in which the mobile receiver is located through communication from the mobile receiver. A wireless paging system that includes a central control unit having a mobile receiver, and when calling a mobile receiver, calls the mobile receiver only in a wireless zone where the mobile receiver is located or a group of wireless zones including a plurality of wireless zones including the wireless zone. It is a method.

Hereinafter, the present invention will be described in detail based on examples.

〔Example〕

FIG. 1 is a diagram showing an example of a system configuration of a radio paging system for explaining the present invention, in which reference numerals 1 and 13 denote a telephone;
is a telephone network, 3 is a central control unit, 4 is a service area of radio base station A, 5 is a service area of radio base station B, 6 is a service area of radio base station C, 7 is a service area of radio base station, 8 to 11 represent transmitters, and 12 represents a mobile receiver.

In the wireless paging method, if the service area is narrow,
A single wireless base station can call mobile receivers m (hereinafter simply referred to as receivers) within the area, but if the service area is wide, multiple wireless base stations may be used as shown in Figure 1. By installing a P& line, a service area is formed by a plurality of P& line zones, and when calling a mobile receiver, it is common to call simultaneously from each radio base station using the same frequency and the same signal.

However, with this method, the number of receivers that can be called per unit time is limited, so in order to call out more receivers than the upper limit, it is necessary to install a wireless base station with a different frequency as described above. There was a need.

In other words, if the time required to call one receiver is t seconds and the number of times one receiver is called in IFllrwI is n times, the number N of receivers that can be called in one hour is as shown in equation (1). .

N=(60 seconds x 60 minutes)/(seconds x n times>--...
(1) Therefore, if it was necessary to call more receivers than this, it was necessary to install a separate system.

According to the present invention, in hII of FIG. 1, the person carrying the receiver, for example, calls #! 13 to the method shown in Figure 2, the central $1811 unit r! 13, the wireless base station registers the service area in which it is located, and the wireless base station calls only the receivers located in each area as shown in Figure 3, so it is difficult to call in all service areas. The number of receivers that can be used can be significantly increased.

For example, if receivers are evenly located in each service area and the number of service areas is m, the number of receivers that can be accommodated is multiplied by m.

With this method, the receiver needs to re-register each time he or she moves through the service area, and if each service area is narrow or it is necessary to move over a wide range, the mobile receiver must be handled differently. becomes a little complicated.

Therefore, as a method of calling the receiver, as shown in FIG. 4, if a method is adopted in which a plurality of service areas are combined and called as one service area, the complexity of handling can be reduced.

In general, as the number of receivers that can be accommodated in one system increases, the time required to call one receiver increases, resulting in 8! The number decreases.

When using a digital signal as a calling signal, the number of receivers N
In order to identify it, please be satisfied! bits are required and the signal speed is S b/
In the case of s, the time opening t required to call one receiver is t= i/S ・・・・・・・・・・・・ (
3).

Therefore, in order to increase N, it is necessary to greatly reduce l, which also increases t, resulting in a contradiction in that N becomes smaller than in equation (1).

In order to avoid this, it is necessary to increase N without increasing l, and an effective way to do this is to make the receiver identification number the same regardless of the service area.

In other words, if each service area or service area group has a different reception 8!2 identification number, one receiver has as many receiver identification numbers as there are service areas or service area groups, so all service areas The receiver identification number required is the number of receivers x service area (
Group) number is required, but this is 1 reception per 1 reception area in the entire service area 8! If it is an identification number, the number of required receiver identification numbers will be equal to the number of receivers.

In this way, the number of receiver identification numbers that can be assigned increases significantly, so it becomes possible to assign a plurality of identification numbers to one mobile receiver as in the present invention.

As a result, it is possible to adopt a method such as changing the identification number for calling the receiver depending on the wireless zone, as in the embodiment shown in claim (2).

〔Effect of the invention〕

As described above, according to the present invention, since calls are made only in the area where the receiver is located, there is an advantage that the subscriber capacity can be increased economically.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of the configuration of a wireless paging system.
Figure 2 is a diagram showing an example of how to register a service area, Figure 3
The figure shows a first example of a method for calling a receiver, and FIG. 4 is a diagram showing an example of NS2's method for calling a receiver.

Claims (2)

[Claims] (1) In a radio paging system where a service area is constructed by aggregating multiple wireless zones with a wireless base station as the core, multiple identification numbers are assigned to mobile receivers and information about the mobile receivers is stored. and a means for registering or changing the radio zone in which the mobile receiver is located by means of communication from the mobile receiver; A radio paging system characterized in that a mobile receiver is called only in a radio zone where a mobile receiver is located or a radio zone group consisting of a plurality of radio zones including the radio zone. (2) The radio paging system according to claim (1), which calls mobile receivers with different identification numbers depending on the radio zone or a radio zone group consisting of a plurality of radio zones including the radio zone.