Title:
【発明の名称】無線通信システムにおけるランダム・アクセス・チャネル割当方法及びシステム
Document Type and Number:
Japanese Patent JP2003506931
Kind Code:
A
Abstract:
A radio communication system has a random access channel for the transmission of data ( 214 ) from a secondary station to a primary station. Such a channel is intended for use by secondary stations having data ( 214 ) to transmit to a primary station while not actually engaged in a call. A problem with known systems of this type is that a secondary station requesting access also specifies which of a plurality of resources it wishes to access. If that resource is busy access is denied, even if other suitable channels are available. In the present system allocation of a channel is performed by the primary station when acknowledging ( 206,210 ) a secondary station's access attempt ( 202,208 ), thereby eliminating wasted attempts. In one embodiment the primary station also periodically broadcasts a short message indicating the availability of channels for access attempts.
Inventors:
Murthley, Timothy Jay
Hunt, bernard
Hunt, bernard
Application Number:
JP2001513924A
Publication Date:
February 18, 2003
Filing Date:
July 21, 2000
Export Citation:
Assignee:
Konin Krekka Philips Electronics NV
International Classes:
H04J3/17; H04L12/28; H04L12/56; H04W74/08; H04W4/14; H04W28/12; (IPC1-7): H04Q7/36; H04J3/17; H04L12/28; H04Q7/38
Attorney, Agent or Firm:
Tadahiko Ito