| 摘要 |
<p>When user equipment UE transitions between a cell in a first radio access technology to a cell in a second radio access technology, at the transition (206, figure 2) a timer for controlling when the UE is to send a periodic location registration is reset (204, figure 2; 304, figure 3). This avoids the UE being implicitly detached when it is unable/blocked in the packet-switched PS domain from performing a routing area update RAU but would be able to perform a location update LU, particularly when the UE is in PS/CS modes 1 or 2. Five different embodiments are detailed: the LU timer T3212 is reset with a value of time remaining in a tracking area update TAU timer T3412 (306); T3212 is reset with an initial value for T3212 (310); the RAU timer T3312 is reset with a value of time remaining in the TAU timer T3412 (312); and the T3212 or T3312 reset is conditional on a value of time remaining in a PS back-off timer T3346 exceeding the value of time remaining in the TAU T3412 (308) and (314). The first radio access technology is E-UTRAN, the second radio access technology is UTRAN or GERAN.</p> |
