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Title:
【発明の名称】マルチキャストグループ構成方法及びマルチキャスト通信ネットワーク
Document Type and Number:
Japanese Patent JP2842524
Kind Code:
B2
Abstract:
In a computer network formed by subnetworks in which a multicast scope is defined as a reachable extent of multicast packets, each host in the scope transmits a multicast packet containing a scope field indicating that transmission of the multicast packet beyond the scope is forbidden and a boundary flag indicating whether only those hosts within the scope are allowed to participate in a group activity or mobile hosts outside the scope are also allowed to participate in the group activity. Each router connected to the subnetworks of the scope receives a multicast packet and prevents it from being transmitted beyond the scope if the scope field is contained in the received packet. A home agent located within the scope receives a multicast packet and transmits it to a mobile host visiting the external subnetwork if the boundary flag of the received packet indicates that participation in the group activity is allowed.

Inventors:
OKANOE KAZUHIRO
Application Number:
JP14429596A
Publication Date:
January 06, 1999
Filing Date:
June 06, 1996
Export Citation:
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Assignee:
NIPPON DENKI KK
International Classes:
H04L12/18; H04L12/56; (IPC1-7): H04L12/18; H04L12/28; H04L12/46; H04L12/56
Domestic Patent References:
JP8163156A
Attorney, Agent or Firm:
後藤 洋介 (外2名)



 
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