Abstract:
The invention relates to the provision of a means for preventing interference and the occurrence of nullsliding collisionsnull when two or more DECT communication systems are used in relatively close proximity The invention provides for the connection of the DECT systems to a data communication network along which a timing reference signal is carried such that the DECT systems connected to the network are synchronised. In one embodiment further steps can be taken to adapt the timing reference signal to take into account changes in the distance from the respective DECT systems to the data communication system head end at which the timing reference is generated.
Abstract:
Channel selection procedure for a mobile communication device A method of controlling a mobile communication device, such as a mobile telephone, to operate at or over one or more predetermined frequency values or ranges depending on the geographical location. The method includes the steps of determining where the mobile communication device is in terms of geographical location using GSM network information, identifying frequency values or ranges available in the geographical location at which the device can operate and configuring the mobile communication device to operate at one of the identified frequency values or ranges.