Invention Grant
US08234547B2 Seamless handover of multicast sessions in internet protocol based wireless networks using staggercasting
有权
基于互联网协议的无线网络中组播会话的无缝切换使用交错
- Patent Title: Seamless handover of multicast sessions in internet protocol based wireless networks using staggercasting
- Patent Title (中): 基于互联网协议的无线网络中组播会话的无缝切换使用交错
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Application No.: US12226799Application Date: 2006-04-29
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Publication No.: US08234547B2Publication Date: 2012-07-31
- Inventor: Hang Liu , Kumar Ramaswamy
- Applicant: Hang Liu , Kumar Ramaswamy
- Applicant Address: FR Issy les Moulineaux
- Assignee: Thomson Licensing
- Current Assignee: Thomson Licensing
- Current Assignee Address: FR Issy les Moulineaux
- Agent Robert D. Shedd; Jeffrey M. Navon; Catherine A. Cooper
- International Application: PCT/US2006/016298 WO 20060429
- International Announcement: WO2007/130012 WO 20071115
- Main IPC: H03M13/00
- IPC: H03M13/00

Abstract:
A method and apparatus are described for recovering from loss of an original data packet, including detecting data packet loss, joining a delayed multicast group, receiving a delayed data packet and using the delayed data packet to recover the original data packet that was lost. The delayed data packet is one of a copy of the original data packet, a copy of the original data packet encoded at a lower bit rate or a parity packet. Also described are a method and apparatus for staggercasting including encoding and compressing a first data sequence, packetizing the compressed encoded data sequence to form a data packet, multicasting the data packet to a first multicast group, encoding and compressing a second data sequence, packetizing the compressed encoded second data sequence to form a packet and multicasting the packet delayed by an offset time to a second multicast group.
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Information query
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