Method and apparatus for supporting machine-type communications with a mobile-originated-only mode
A method and apparatus for supporting machine-type communications (MTC) are disclosed. A wireless transmit/receive unit (WTRU) may configure itself to operate in a mobile-originated-only mode. The WTRU may perform no, or a subset of, radio resource control (RRC) idle and/or non-access stratum (NAS) idle/standby state procedures in the mobile-originated-only mode. For example, the WTRU may perform cell reselection but not paging monitoring in the mobile-originated-only mode. Alternatively, the WTRU may perform paging monitoring but not cell reselection and location update. The operation in the mobile-originated-only mode may be triggered explicitly or implicitly. For example, the WTRU may operate in the mobile-originated-only mode if an inactivity timer expires. The WTRU may switch the mode in accordance with a pre-configured schedule. After transition of the operation mode, the WTRU may send a message to the network indicating such mode switch.
1. A wireless transmit/receive unit (WTRU) supporting machine-type communications for use in a wireless network, comprising:
a first WTRU timer that indicates to the WTRU to change from a mobile originated-and-terminated-mode to a mobile-originated-only mode, in which the WTRU is attached to a wireless communications network and performs no cell reselection, no location update procedures, no system information monitoring, or no paging monitoring while attached to the network;
a second WTRU timer that indicates to the WTRU to change from the mobile-originated-only mode to the mobile originated-and-terminated-mode; and
a processor comprising executable instructions to change the WTRU from the mobile originated-and-terminated-mode to the mobile-originated-only mode in response to the first WTRU timer, and to change the WTRU from the mobile-originated-only mode to the mobile originated-and-terminated-mode in response to a mobile origination event or the second WTRU timer.
2. The WTRU of claim 1 , wherein the processor further comprises executable instructions to set the first WTRU timer based on a time parameter received from the wireless network.
3. The WTRU of claim 2 , wherein the time parameter comprises a cycle time and a reachable period.
4. The WTRU of claim 2 , wherein the time parameter comprises a reachable period for operating in the mobile originated-and-terminated-mode.
5. The WTRU of claim 1 , wherein the processor is further configured to generate a message to send to the wireless network that indicates to the wireless network that the WTRU can operate in the mobile-originated-only mode.
6. The WTRU of claim 5 , wherein the message is one of a tracking area update message, a routing area update message, and an attach request message.
7. The WTRU of claim 5 , wherein the message is an RCC message.
8. The WTRU of claim 1 , wherein the WTRU comprises a battery that provides power for the WTRU and the WTRU uses less battery power on a per unit time basis in the mobile-originated-only mode than when the WTRU is in the mobile originated-and-terminated-mode.
9. A method of using a wireless transmit/receive unit (WTRU) supporting machine-type communications in a wireless network, comprising:
changing the WTRU from a mobile originated-and-terminated-mode to a mobile-originated-only mode, in which the WTRU is attached to a wireless communications network and performs no cell reselection, no location update procedures, no system information monitoring, or no paging monitoring while attached to the network, in response to a first WTRU timer; and
changing the WTRU from the mobile-originated-only mode to the mobile originated-and-terminated-mode in response to a second WTRU timer.
10. The method of claim 9 , further comprising setting the WTRU first timer based on a time parameter received from the wireless network.
11. The method of claim 9 , further comprising setting the WTRU second timer based on a time parameter received from the wireless network.
12. The method of claim 10 , wherein the time parameter comprises a cycle time and a reachable period.
13. The method of claim 10 , wherein the time parameter comprises a cycle time and an unreachable period.
14. The method of claim 10 , wherein the time parameter comprises a time.
15. The method of claim 9 , further comprising generating a message to send to the wireless network that indicates to the wireless network that the WTRU can operate in the mobile-originated-only mode.
16. The method of claim 15 , wherein the message is one of a tracking area update message, a routing area update message, and an attach request message.
17. The method of claim 15 , wherein the message is an RCC message.
18. The method of claim 9 , wherein the WTRU comprises a battery that provides power for the WTRU and the WTRU uses less battery power on a per unit time basis in the mobile-originated-only mode than when the WTRU is in the mobile originated-and-terminated-mode.