Communication system, method thereof, switching center thereof and base station control station thereof

A communication system including a plurality of base stations (3-1 to 3-4) having cells (A1 to A4) serving as radio service areas, respectively, base station control stations (2-1 to 2-2) for managing and controlling said base stations, and a switching center (1) having a switching function for said base station control stations and a communication network, wherein

• said switching center comprises means for, when sending a line assignment request message to said base station control station in response to an outgoing call involving the type of a communication service from a user terminal (4) lying in said cells, sending not only desired communication rate information in accordance with the type of the communication service of said call but also negotiable communication rate information other than the desired communication rate.

A communication method including a plurality of base stations (3-1 to 3-4) having cells (A1 to A4) serving as radio service areas, respectively, base station control stations (2-1, 2-2) for managing and controlling said base stations, and a switching center (1) having a switching function for said base station control stations and a communication network, said method including the step of:

• also sending, in said switching center, when sending a line assignment request message to said base station control station in response to an outgoing call involving the type of a communication service from a user terminal (4) lying in said cells, communication rate information in accordance with the type of the communication service of said call and a negotiable indicator indicating whether this communication rate is negotiable or not.

A communication method including a plurality of base stations (3-1 to 3-4) having cells (A1 to A4). serving as radio service areas, respectively, base station control stations (2-1, 2-2) for managing and controlling said base stations, and a switching center (1) having a switching function for said base station control stations and a communication network, including the step of;

• sending, in said switching center, when sending a line assignment request message to said base station control station in response to an outgoing call involving the type of a communication service from a user terminal (4) present in said cell, not only desired communication rate information in accordance with the type of the communication service of said call but also negotiable communication rate information other than the desired communication rate.

A switching center (1) in a communication system including a plurality of base stations (3-1 to 3-4) having cells (A1 to A4) serving as radio service areas, respectively, base station control stations (2-1, 2-2) for managing and controlling said base stations, and the switching center (1) having a switching function for said base station control stations and a communication network, said switching center comprising:

• means for, when sending a line assignment request message to said base station control station in response to an outgoing call involving the type of a communication service from a user terminal (4) lying in said cells, also sending communication rate information in accordance with the type of the communication service kind said call and a negotiable indicator indicating whether this communication rate is negotiable or not.

A switching center (1) in a communication system including a plurality of base stations (3-1 to 3-4) having cells (A1 to A4) serving as radio service areas, respectively, base station control stations (2-1, 2-2) for managing and controlling said base stations, and the switching center (1) having a switching function for said base station control stations and a communication network, said switching center comprising:

• means for, when sending a line assignment request message to said base station control station in response to an outgoing call involving the type of a communication service from a user terminal (4) lying in said cells, sending not only desired communication rate information in accordance with the type of the communication service of said call but also negotiable communication rate information other than the desired communication rate.

A communication system including a plurality of base stations (3-1 to 3-4) having cells (A1 to A4) serving as radio service areas, respectively, base station control stations (2-1, 2-2) for managing and controlling said base stations, and a switching center (1) having a switching function for said base station control stations and a communication network, wherein

• said switching center (1) comprises means for sending, in response to an outgoing call involving the type of a communication service from a user terminal (4) lying in said cells, a line assignment request message containing communication rate information in accordance with said type of the communication service to said base station control stations;
• and
• said base station control stations comprising means for determining whether said communication rate is negotiable or not on the basis of information in said line assignment request message.