Patent ID: 6370117
Filing Date: 2002-04-09
Classification: H04B,H04J

Abstract:
A method of allocating channel slots to waiting calls coming from a plurality of user stations, for an integration of constant and variable bit rate (CBR and VBR) traffic into a communication channel divided into frames each of which includes N(F) time slots, wherein, under normal loading conditions for both traffic types, each frame is subdivided into a CBR traffic sub-frame composed of N(C) slots, and a VBR traffic sub-frame composed of N(Vmin) slots and, between them, a sub-frame called common resource pool (CRP) and composed of the (N(F)âˆ’N(C)âˆ’N(Vmin)) remaining slots of the frame, said allocation method then comprising the following steps:(a) as the VBR traffic loading increases over that of CBR traffic, a boundary between them moves inside the CRP and the CBR sub-frame in order to include unallocated CBR channels; (b) as the CBR traffic goes up, at small VBR loads said boundary moves in the CRP towards the VBR sub-frame, wherein any displacement is limited by the minimum number of resources N(Vmin) permanently reserved for VBR traffic; (c) under high loading conditions for both traffic types, CBR traffic resources are limited to N(C), and remaining resources N(V)=N(F)âˆ’N(C) in the frame are available to VBR traffic.