发明授权
- 专利标题： Method and apparatus to enable fallback to circuit switched domain from packet switched domain
- 专利标题（中）： 从分组交换域启用回路到电路交换域的方法和装置
-
申请号： US12408028申请日： 2009-03-20
-
公开(公告)号： US08599791B2公开(公告)日： 2013-12-03
- 发明人: Rajat P. Mukherjee , Mohammed Sammour , Shankar Somasundaram , Catherine M. Livet , Ulises Olvera-Hernandez
- 申请人： Rajat P. Mukherjee , Mohammed Sammour , Shankar Somasundaram , Catherine M. Livet , Ulises Olvera-Hernandez
- 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
- 代理商 Frank M. Linguiti
- 主分类号： H04W4/00
- IPC分类号： H04W4/00
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 command in response to the CS service request.
公开/授权文献
信息查询
