Method and apparatus having improved handling of state transitions
View Patent ↗A method, in a wireless communications device, for transitioning between communication states, the wireless communications device compliant for use in a Universal Mobile Telecommunications System (UMTS), the method comprising: checking for radio bearer mapping information for the communication state being transitioned to prior to sending an update message, where the transition between communication states is not a transition from a paging state to a bidirectional communication state using shared channels; and transitioning to the state to be transitioned to using the checked radio bearer mapping information for that state and sending the update message.
1. A method, in a wireless communications device, for transitioning between communication states, the method comprising:
upon moving from a paging state to a bidirectional communication state, only checking for valid signaling radio bearer mapping after receiving an update confirm message.
2. A method according to claim 1 , wherein the wireless communication device moves to an idle mode when there is no valid signaling radio bearer mapping.
3. A method according to claim 1 , wherein the paging state is CELL_PCH or URA_PCH.
4. A method according to claim 1 , wherein the bidirectional communication state is CELL_FACH.
5. A wireless communications device arranged, in use, to transition between communication states, the wireless communications device arranged, upon moving from a paging state to a bidirectional communication state, only to check for valid signaling radio bearer mapping after receiving an update confirm message.
6. A wireless communications device according to claim 5 , wherein the wireless communication device is arranged to move to an idle mode when there is no valid signaling radio bearer mapping.
7. A wireless communications device according to claim 5 , wherein the paging state is CELL_PCH or URA_PCH.
8. A wireless communications device according to claim 5 , wherein the bidirectional communication state is CELL_FACH.
9. A non-transitory computer program comprising program code arranged, in use in a wireless communications device, to cause the wireless communications device to transition between communication states, the computer program causing the wireless communications device, upon moving from a paging state to a bidirectional communication state, only to check for valid signaling radio bearer mapping after receiving an update confirm message.
10. A non-transitory computer program product comprising program code stored on a computer readable medium, the program code arranged, in use in a wireless communications device, to cause the wireless communications device to transition between communication states, the computer program product causing the wireless communications device, upon moving from a paging state to a bidirectional communication state, only to check for valid signaling radio bearer mapping after receiving an update confirm message.