CATV COMMUNICATIONS SYSTEM

专利名称：CATV COMMUNICATIONS SYSTEM发明人：ROBERT PATRICK MCNAMARA,GREGORY

BRUCE ENNIS,RICHARD JAY

FEIERTAG,ROBERT KENNETH BAUER

申请号：AU1406983申请日：19830429公开号：AU1406983A公开日：19831103

摘要：A decentralized communication arrangement is provided for a two way cabletelevision (CATV) network wherein a node originating a message (a source node) and anode receiving a message (a destination node) can be located at any respective points inthe CATV system. In one aspect, a source node transmits a message towards theheadend of the upstream portion of the cable spectrum. The headend selectivelyrebroadcasts the upstream message in the downstream portion of the cable spectrum,thus providing an arrangement whereby a source node is able to transmit a message to adestination node, wherever located. Since, the CATV communication network is deployedto the general public, another aspect of the present system includes a mechanism bywhich the access to CATV communication resources is controlled so that unauthorizedusers are denied access and authorized users are granted access. In accordance with thisaspect, a source node further transmits a verification message, referred to herein as aframe verifier (FV) code, as part of the upstream message. The invention further providesfor the headend apparatus to examine the frame verifier code and rebroadcast thereceived upstream message in the downstream portion of the cable spectrum only if the

frame verifier code indicates that the source node is an authorized user, thereby grantingthe user access to the CATV resources. Conversely, the headend apparatus does notrebroadcast the upstream message if the frame verifier message indicates that thesource node is not an authorized user thereby denying the user access to the CATVresources.

申请人：GENERAL INSTRUMENT CORP.

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