Invention Grant
US07693102B2 Communication system, method thereof, switching center thereof and base station control station thereof 有权
通信系统及其方法,切换中心和基站控制站

  • Patent Title: Communication system, method thereof, switching center thereof and base station control station thereof
  • Patent Title (中): 通信系统及其方法,切换中心和基站控制站
  • Application No.: US10344360
    Application Date: 2001-08-10
  • Publication No.: US07693102B2
    Publication Date: 2010-04-06
  • Inventor: Sadafuku Hayashi
  • Applicant: Sadafuku Hayashi
  • Applicant Address: JP Tokyo
  • Assignee: NEC Corporation
  • Current Assignee: NEC Corporation
  • Current Assignee Address: JP Tokyo
  • Agency: Young & Thompson
  • Priority: JP2000-243529 20000811
  • International Application: PCT/JP01/06932 WO 20010810
  • International Announcement: WO02/15629 WO 20020221
  • Main IPC: H04W4/00
  • IPC: H04W4/00
Communication system, method thereof, switching center thereof and base station control station thereof
Abstract:
A WCDMA communication system that enables smooth data transmission although a communication rate corresponding to a communication service desired by a user can not be ensured due to lack of resources. If the desired communication rate can not be ensured due to lack of resources, instead of an alternative lower communication rate which is compulsorily set to by the base station control station (2-1, 2-2), the communication rate for actually effecting a data communication is negotiated between a switching center (1) and the base station control stations (2-1, 2-2), only when it is possible to provide a service at a communication rate lower than the requested communication rate. As one method of this, an indicator that indicates whether the communication rate can be negotiated or not is provided in a RAB assignment request to be transmitted from the switching center (1) to the base station control stations (2-1, 2-2). Only when this indicator indicates passable, the base station control stations (2-2, 2-2) decide, in the case of lack of resources, a communication rate lower than the desired communication rate, and transmit to the switching center (1) a RAB assignment response containing this decided communication rate. The communication service for a user terminal (4) is started in accordance with this communication rate.
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