Mobile communication system and mobile communication method thereof

• US 6,163,695 A
• Filed: 04/15/1998
• Issued: 12/19/2000
• Est. Priority Date: 04/16/1997
• Status: Expired due to Term

• Current Assignee: Renesas Electronics Corporation
• Original Assignee: NEC Corporation
• Inventors: Takemura, Narihira
• Primary Examiner(s): TO, DORIS HA
• Application Number:
  US09/061,684
• Time in Patent Office: 979 Days
• Field of Search: 455/421, 455/422, 455/404, 455/432, 455/456, 455/528, 455/67.1, 455/88, 455/565
• US Class Current: 455/456.4
• CPC Class Codes: H04W 48/04 based on user or terminal location or mobility data, e.g. moving direction, speed

Abstract

A mobile communication system and mobile communication method are capable of avoiding call-interruption while calling attention of the user who calls to be moved before entering transmission-stop zone. In the mobile communication method, it causes a base station ID to be received while retrieving all frequencies, thus judging whether or not there exists base station ID of "transmission-stop" instruction. When there is the base station ID of the "transmission-stop" instruction, it is judged that a mobile station exists in a transmission control zone, it comes into a state in which transmission is stopped, before coming into reception state. While when there is no the base station ID of the "transmission-stop" instruction, it is judged that a mobile station exists out of a transmission control zone, thus being selected a transmission destination. There is judged whether or not warning information is incorporated in base station ID of the transmission destination base station. When the warning information exists, the warning information/warning sound is generated, followed by shifting to normal operation. While when no warning information exists in the base station ID of the transmission destination, transmission is started to the transmission destination base station while shifting to the normal operation.

Claims

1. A mobile communication method for communicating between many and unspecified mobile stations or between the mobile station and a public telephone network through a plurality of base stations having individual service area determined respectively wherein a transmission starting procedure is implemented before starting transmission while selecting transmission destination, or before starting transmission at the time hand over selecting transmission destination base station, as said transmission starting procedure comprising the steps of:

a first step for retrieving frequency of signal transmitted to be outputted from all base stations within whole service area in said mobile communication system, thus receiving a base station identification code of respective base stations which are capable of being recognized due to the retrieval;

a second step for judging whether or not there exists a base station identification code including "transmission-stop" instruction as a transmission control instruction among the received base station identification codes though it is only one "transmission-stop" instruction;

a third step for judging that present location of mobile station is not an established transmission-stop zone which transmission output is being prohibited, when there does not exist the base station identification code incorporating "transmission-stop" instruction as a transmission control instruction in said second step;

a fourth step for returning to reception operation state, namely returning to said first step while stopping transmission output, after judging that present location of the mobile station is located within the zone being established as the transmission-stop zone, when there exists the base station identification code incorporating "transmission-stop" as the transmission control instruction in said second step;

a fifth step for selecting a transmission destination base station following said third step;

a sixth step for judging whether or not warning information is incorporated into a base station identification code of the transmission destination base station selected in said fifth step;

a seventh step for starting transmission to the transmission destination base station while shifting to normal operation when there is judged that warning information is not incorporated in base station identification code of the transmission destination base station in said sixth step; and

a eighth step for starting transmission to said transmission destination base station while shifting to normal operation of said seventh step corresponding to a warning content after indicating warning information to user when warning information is incorporated in the base station identification code of the transmission destination base station in said sixth step.

2. A mobile communication method as claimed in claim 1, wherein said warning information which is taken as candidate of judgement in said fifth step is "transmission-stop warning" information informs that location of the mobile station is approaching to transmission prohibition zone.

3. A mobile communication method as claimed in claim 1, wherein said warning information which is taken as candidate of judgement in said fifth step is "outside-area warning" information informs that location of the mobile station is approaching to outside-area of whole service area.