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METHOD FOR MOST EFFICIENT ROUTING OF AUDIO IN MULTI-ZONE SYSTEMS

IP.com Disclosure Number: IPCOM000007445D
Original Publication Date: 1995-Jul-01
Included in the Prior Art Database: 2002-Mar-27
Document File: 1 page(s) / 61K

Publishing Venue

Motorola

Related People

Ed Zhong: AUTHOR

Abstract

In Multi-Zone systems, in which all the zones are connected for both audio and control data, the need to establish communications that include more than two zones is known. It is desirable to establish efficient links between zones in such a communica- tion. Efficiency can be based on numerous factors, such as distance, resource utilization, available chan- nels, usage costs, etc.

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METHOD FOR MOST EFFICIENT ROUTING OF AUDIO IN MULTI-ZONE SYSTEMS

by Ed Zhong

  In Multi-Zone systems, in which all the zones are connected for both audio and control data, the need to establish communications that include more than two zones is known. It is desirable to establish efficient links between zones in such a communica- tion. Efficiency can be based on numerous factors, such as distance, resource utilization, available chan- nels, usage costs, etc.

  The present invention proposes to assign a cost value to each of the audio links in a Multi-Zone system. A cost for each link, based on the efficiency factors described above, is determined either prior to or at the time when a call requiring multiple zone participation is made. The call's originating zone sorts all the links connecting zones by increasing cost. The lowest cost link between two of the zones required by the call is chosen. This process is repeated on the remaining links, going from lower to higher cost, such that the zones required by the Multi-Zone call are linked together. Links having low cost, but which are not required in the call or links which form closed loops with the already chosen links, are passed over. The link selection continues until all required zones are connected. The described

method of link selection is the minimum spanning tree algorithm applied on the graph formed by the "required" zones.

  It is understood that cases could occur in which zones required for a call can't be l...