Mobile communication system enabling efficient use of small-zone base stations

Abstract

A mobile communication system includes a plurality of radio base stations forming respective radio zones and a mobile station selecting a wait zone and a base station to which a request for a message channel is to be issued. Each of the plurality of radio base stations is assigned an order of priority. Information relating to the order of priority is used by the mobile station to select a wait zone and a base station to which a request for a message channel is to be issued.

Description

[0001]Notice: More than one reissue application has been filed for the reissue of U.S. Pat. No. 6,493,561. The reissue applications are application Ser. Nos. 11 / 008,757 and 11 / 398,460 (the present application), the present application being a continuation of application Ser. No. 11 / 008,757.<?insert-end id="INS-S-00001" ?>BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention generally relates to mobile communication systems and mobile station apparatuses, and, more particularly, to a mobile communication system in which a radio zone where a mobile station is to enter a wait state is determined by the electric field intensity of a received radio wave that arrives from a radio base station, and to a mobile station apparatus that receives communication service by accessing such a mobile communication system.[0004]The present invention also relates to a mobile communication system wherein a mobile station selects a base station to which a request for...

AI Technical Summary

Benefits of technology

[0039]Accordingly, a general object of the present invention is to provide a mobile communication system and a mobile station apparatus in which the aforementioned problems of the conventional system are eliminated.

[0040]Another and more specific object of the present invention is to provide a mobile communication system and a mobile station apparatus in which a radio base station adapts itself to a dynamically established traffic distribution, or in which a mobile station can most successfully enter a radio zone in which it is actually located so as to be set up for a wait therein.

[0061]Since the mobile station requests a message channel from the base station B instead of the base station A providing a higher reception level, the base station B can be used efficiently to handle call originating and call incoming in the mobile station.

[0080]Referring to 31, based on the announcement information from the base station A including the order of priority of the base stations A and B, the mobile station can request a message channel from the base station B instead of the base station A providing a higher reception level. Thus, the base station B, provided to handle an increased local traffic, can be efficiently used to handle call originating and call incoming in the mobile station.

Problems solved by technology

Even when a call originated in the mobile station 651 becomes a successful call so that a conversation is established without the mobile station 651 leaving the zone, the speech quality may be dropped if there is a large propagation loss, with the result that switching of message channels occur too frequently during the conversation.

However, it is not always best for the mobile station in the mobile communication system to issue a request for a message channel to the base station providing the highest reception level in the perch channel.

This large-zone construction formed by the base station A may include an area characterized by a concentrated traffic, resulting in a shortage of message channels in that area.

However, a problem with the conventional mobile communication system is that the mobile station requests a message channel from the base station A providing a higher reception level than the base station B instead of requesting it from the base station B provided to handle an increased local traffic, with the result that the base station B remains unused to handle call originating or call incoming in the mobile station.

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