发明公开
EP2637441A2 Method and apparatus to enable fallback to circuit switched domain from packet switched domain
审中-公开
用于使回退到一个电路的方法和装置交换域从分组交换域
- 专利标题： Method and apparatus to enable fallback to circuit switched domain from packet switched domain
- 专利标题（中）： 用于使回退到一个电路的方法和装置交换域从分组交换域
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申请号： EP13162735.8申请日： 2009-03-19
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公开(公告)号： EP2637441A2公开(公告)日： 2013-09-11
- 发明人: Mukherjee, Rajat, P. , Sammour, Mohammed , Somasundaram, Shankar , Livet, Catherine M. , Olvera-Hernandez, Ulises
- 申请人： Interdigital Patent Holdings, Inc.
- 申请人地址： 200 Bellevue Parkway Suite 300 Wilmington, DE 19809 US
- 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： 200 Bellevue Parkway Suite 300 Wilmington, DE 19809 US
- 代理机构： Johansson, Magnus
- 优先权： US38701P 20080321
- 主分类号： H04W36/00
- IPC分类号： H04W36/00
摘要：
A method and apparatus are used to perform a Circuit Switched (CS) fallback in wireless communications. The Non-Access Stratum (NAS) of the apparatus determines whether to perform a CS fallback based on an Internet Protocol (IP) Multimedia Subsystem (IMS) registration status, and sends a service request indicating a request to perform the CS fallback when the WTRU is attached to a CS domain. The apparatus also includes an Access Stratum (AS) that receives the CS service request from the NAS, sends an indication of the CS service request in a Radio Resource Control (RRC) message to an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN), wherein the RRC message includes CS service information, and receives a handover conunand in response to the CS service request.
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