Communications systems

摘要

A method and system that allows a mobile station of a communications system to request and be granted a fraction (a sub-set) of the overall frequency bandwidth of a communications channel for its transmissions. Thus, for example, in a TETRA system, a mobile station can, instead of having to request and be granted the full frequency bandwidth of an, e.g., 150 kHz QAM channel, request and be granted only a portion or fraction of the 150 kHz bandwidth of the channel, such as a 25 kHz portion of it. This allows the requested and allocated transmission resources to be more readily optimized to the amount of data that a mobile station wishes to transmit.

主权项

1. A method of operating a communications system in which communications stations of the system can request and be granted transmission resources for making their transmissions, and which communications system supports the use of one or more communications channels having a given frequency bandwidth, the method comprising:
a communications station transmitting a request for the allocation of a transmission resource comprising a fraction of the overall frequency bandwidth of a communications channel of the system; the system infrastructure, in response to such a request, allocating the communications station a fraction of the overall frequency bandwidth of a communications channel of the system for its transmission; and the communications station transmitting in the allocated fraction of the bandwidth of the communications channel.