发明授权
- 专利标题： Method and apparatus for synchronizing mobile station media flows during a collaborative session
- 专利标题（中）： 用于在协作会话期间同步移动台媒体流的方法和装置
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申请号： US14691121申请日： 2015-04-20
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公开(公告)号： US09544127B2公开(公告)日： 2017-01-10
- 发明人: Xavier De Foy , Milan Patel , Kamel M. Shaheen , Debashish Purkayastha , Osama Lotfallah , Hang Liu
- 申请人： INTERDIGITAL PATENT HOLDINGS, INC.
- 申请人地址： US DE Wilmington
- 专利权人： InterDigital Patent Holdings, Inc.
- 当前专利权人： InterDigital Patent Holdings, Inc.
- 当前专利权人地址： US DE Wilmington
- 代理机构： Volpe and Koenig, P.C.
- 主分类号： H04B7/00
- IPC分类号： H04B7/00 ; H04L7/00 ; H04L29/06 ; H04L29/08
摘要：
A method and apparatus are described for synchronizing mobile station (i.e., wireless transmit/receive unit (WTRU)) media flows during a collaboration session. Inter-WTRU transfer request messages, flow addition request messages and session update request messages may be exchanged between a plurality of WTRUs and a session continuity control application server (SCC-AS). Each of the messages may include a session description protocol (SDP) attribute line containing time synchronization information (e.g., a presentation time offset (PTO) information element (IE), a media flow group identity (ID) and a synchronization tolerance IE). The SCC-AS may update the time synchronization information and include the updated information in messages it sends to the WTRUs, which may re-synchronize their respective media flows based on the updated time synchronization information.
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