Invention Grant
US07801134B2 VoIP system, VoIP server and client, and multicast packet communication method
有权
VoIP系统，VoIP服务器和客户端，以及组播数据包通信方式
- Patent Title: VoIP system, VoIP server and client, and multicast packet communication method
- Patent Title (中): VoIP系统，VoIP服务器和客户端，以及组播数据包通信方式
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Application No.: US10864519Application Date: 2004-06-10
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Publication No.: US07801134B2Publication Date: 2010-09-21
- Inventor: Masato Hori , Yoshikazu Kobayashi
- Applicant: Masato Hori , Yoshikazu Kobayashi
- Applicant Address: JP Kanagawa
- Assignee: NEC Infrontia Corporation
- Current Assignee: NEC Infrontia Corporation
- Current Assignee Address: JP Kanagawa
- Agency: Sughrue Mion, PLLC
- Priority: JP2003-166764 20030611
- Main IPC: H04L12/28
- IPC: H04L12/28
Abstract:
A VoIP system has a VoIP server and plural clients. The client transmits paging data as multicast packets addressed at a specific multicast address, to other clients. In response to a request from the client, the VoIP server transmits multicast packets of MOH data to the other clients. At this time, whether the other clients can receive multicast packets is determined. To the clients that are determined to be capable of receiving multicast packets, transmission data is sent in the form of multicast packets. To the client which belongs to a router and is determined to be incapable of receiving multicast packets, the transmission data is sent as unicast packets. It is thus possible for the VoIP system to support paging and MOH in the form of multicast packets, with respect to clients incapable of receiving multicast.
Public/Granted literature
- US20040252691A1 VoIP system, VoIP server and client, and multicast packet communication method Public/Granted day:2004-12-16
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