Mobile communication system, common channel transmission control device, and common channel transmission control method used in the system and device
AssigneeNEC Corporation
InventorsKenichi Takai, Shuuzou Yanagi
Life of this patent
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Abstract
A mobile communication system in which a number of common channels are added due to the offering of a new service includes: the assumption that a plurality of common channels can be arranged to transmit the same data, a monitor means that uses the reception path search results of either dedicated channels or random access channels of mobile stations to monitor the communication state of mobile stations within the cell and a control means that, when it is determined that distribution within the cell of mobile stations that receive the new service is unbalanced, effects control to divide and use the communication range permitted by a plurality of common channels.
Claims13
A mobile communication system in which a plurality of common channels are added by offering a new service, comprising:
- the plurality of said common channels configured to transmit same data;
- a monitor unit that uses reception path search results of any of dedicated channels and random access channels of mobile stations to monitor the communication state of the mobile stations in a cell:
- and a control unit that determines, based on monitored results realized by said monitor unit, a state in which a distribution of the mobile stations within the cell that receives said new service is unbalanced to implement control such that a communication range permitted by said plurality of common channels is divided and used, wherein:
- said monitor unit, in the common channels that are added by said new service, uses the state of effective paths of path search positions of the dedicated channels that are being used at a time of the addition to monitor a total number of the dedicated channels and reception positions in the cell;
- and said control unit, when it is determined based on the monitor results that the mobile stations that receive said new service that uses the added common channels are concentrated in the vicinity of a base station, prepares a new common channel from the plurality of the added common channels having different transmission frequency and effects switching such that the mobile stations present in the vicinity of the cell boundary communicate with the new common channel having the different transmission frequency;
- wherein said monitor unit and said control unit are coupled to a memory.
A common channel transmission control method used in a mobile communication system in which a plurality of common channels are added by offering a new service;
- said common channel transmission control method comprising:
- the plurality of said common channels configured to transmit same data;
- a monitor process of using reception path search results of either dedicated channels or random access channels of mobile stations to monitor the communication state of the mobile stations in a cell:
- and a control process that determines, based on monitored results realized by said monitor process, a state in which a distribution of the mobile stations within the cell that receives said new service is unbalanced to implement control such that a communication range permitted by said plurality of common channels is divided and used, wherein:
- in said monitor process, in the common channels added due to said new service, the state of effective paths of path search positions of the dedicated channels that are being used at a time is used to monitor a total number of the dedicated channels and the reception positions within the cell;
- and in said control process, when it is determined based on the monitor results that the mobile stations that receive said new service that uses the common channels that are added are concentrated in the vicinity of a base station, prepares a new common channel from the plurality of the added common channels having a different transmission frequency , and switching is effected such that the mobile stations present in the vicinity of the cell boundary communicate with the new common channel having the different transmission frequency.
Dependencies are inferred from the claim text.