Global Patent Index - EP 1757140 A1

EP 1757140 A1 20070228 - MOBILE COMMUNICATIONS SYSTEMS

Title (en)

MOBILE COMMUNICATIONS SYSTEMS

Title (de)

MOBILKOMMUNIKATIONSSYSTEME

Title (fr)

SYSTEMES DE COMMUNICATIONS MOBILES

Publication

EP 1757140 A1 20070228 (EN)

Application

EP 05737911 A 20050427

Priority

  • GB 2005001597 W 20050427
  • GB 0409388 A 20040427
  • GB 0411427 A 20040521

Abstract (en)

[origin: WO2005107308A1] A communications system (1) includes an indirect access cell (2), which includes one or more voice traffic channels, a common, shared main control channel, and one or more indirect access packet data channels, and a dedicated data cell (3) that provides one or more packet data channels, but that does not offer any voice traffic channels, or include a common control channel. When a mobile station MS1 that is currently active on a data channel of the direct access data cell (3) wishes to take place in a voice call with other mobile stations MS2, MS3 and/or MS4 in the system, the mobile station MS1 is temporarily transferred from the direct access data cell (3) to the indirect access cell (2) to participate in the voice call. This is achieved by the system infrastructure sending appropriate signalling on the data channel of the cell (3). The mobile station MS1 is arranged to return automatically to its original packet data channel on the cell (3) once its participation in the voice call on the indirect access cell (2) has finished.

IPC 8 full level

H04L 12/56 (2006.01); H04W 36/34 (2009.01); H04W 36/14 (2009.01)

CPC (source: EP)

H04W 16/00 (2013.01); H04W 72/04 (2013.01)

Citation (search report)

See references of WO 2005107308A1

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 2005107308 A1 20051110; EP 1757140 A1 20070228; GB 0416039 D0 20040818; GB 0508564 D0 20050601; GB 2415332 A 20051221; GB 2415332 B 20061213

DOCDB simple family (application)

GB 2005001597 W 20050427; EP 05737911 A 20050427; GB 0416039 A 20040716; GB 0508564 A 20050427