| 摘要 |
The routing of calls in a telecommunications switching system (12 1, 12 2) comprised of one or more fabrics (22 1, 22 2, 22 3) controlled by correspond ing fabric controllers (26 1, 262 and 26 3, respectively) is carried out by a routing p rocessor (28) independent of the fabrics. The routing processor actually selects the route for each call by specifying a channel to a neighboring switching system to carry the call. Further, the routing processor has the capability to respond to queries from other switch ing systems regarding trunk group status and traffic load to enable the processor to ass ist the routing processor of the other switching system to make routing decisions. By implem enting fabric independent routing, routing processing is re-used for new fabric cap acity, and is readily extended to accommodate new service types, such as bursty data servi ces.Fabric independent routing achieves lower developmen t cost by avoiding redevelopment of routing functions on new fabric controllers, as they are ad ded, and the addition of new routing features is made on a single routing processor funct ion versus multiple fabric controllers. Fabric independent routing allows routing proce ssing to be implemented on processors with essentially unlimited real-time and memory re sources by riding the processor technology curve,and achieves performance advantages such as reduced call set up delay and improved overall switch reliability.
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