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. No. 11 / 008,757 filed Dec. 9, 2004 (the present application); application Ser. No. 11 / 398,460 filed on Apr. 5, 2006; application Ser. No. 12 / 702,435 filed on Feb. 9, 2010; and application Ser. No. 12 / 783,778 filed on May 20, 2010. Application Ser. No. 11 / 398,460 is a continuation reissue application of the present application; and application Ser. Nos. 12 / 702,435, and 12 / 783,778 are divisional reissue applications of the present application.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 st...

AI Technical Summary

Benefits of technology

The present invention provides a mobile communication system and a mobile station apparatus that overcome the problems of conventional systems. The system includes multiple radio base stations and mobile stations that can adapt to changing traffic demands and can efficiently enter radio zones to start communication services. The mobile station selects a radio zone with the highest priority and receives communication services through that zone. The system also assigns order of priority to the radio zones based on their probability density. The mobile station measures the electric field intensity of the radio channel and designates the radio zone with the highest electric field intensity as the wait zone for communication services. Overall, the invention provides a more efficient and effective mobile communication system.

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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