Telecommunications apparatus and methods
A wireless telecommunication system comprises a base station and a terminal device (UE). The UE is configured to determine its mobility status and an associated reliability, e.g. an indication of the extent to which the UE is moving and the confidence in this determination. In some cases the reliability may be based on how the UE determined its mobility status. For example, if the UE determined itself to be of relatively low mobility because it has an internal configuration setting indicating it is deployed in a fixed position, the reliability of this mobility status may be considered to be greater than if the UE determined itself to be of relatively low mobility because it has not recently undergone many base station handovers. The UE is configured to convey an indication of the mobility status and the reliability to the base station. The base station may then configure the UE for operation within the wireless telecommunications system in a manner that takes account of both the mobility status and the reliability for the mobility status. This can help optimise configuration settings for the UE which depend on device mobility.
1. A terminal device for communicating with a base station in a wireless telecommunications system, wherein the terminal device comprises a controller and a transceiver configured to operate together to:
determine a mobility status for the terminal device and an associated reliability for the determined mobility status;
convey an indication of the mobility status and an indication of the reliability for the mobility status to the base station;
configure the terminal device in a power saving state when the indication of the mobility status is a first setting and the indication of the reliability of the mobility status has a first setting; and
configure the terminal device to make handover measurements when the indication of the mobility status is the first setting and the indication of the reliability of the mobility status has a second setting different from the first setting.
2. The terminal device according to claim 1 , wherein the indication of the reliability for the mobility status includes a high setting as the first setting and a low setting as the second setting.
3. The terminal device according to claim 1 , wherein the indication of the mobility status and the indication of the reliability of the mobility status are different.
4. The terminal device according to claim 1 , wherein the indication of the mobility status is determined from a plurality of previously determined locations for the terminal device, and the indication of the reliability for the mobility status is determined from a plurality of previously determined locations for the terminal device.
5. The terminal device according to claim 1 , wherein the mobility status for the terminal device is determined from the terminal device being connected to one or more base stations of the wireless telecommunications system, and the indication of the reliability for the mobility status is determined from the terminal device being connected to one or more base stations of the wireless telecommunications system.
6. A method of operating a base station for communicating with a terminal device in a wireless telecommunications system, the method comprising:
receiving from the terminal device an indication of a determined mobility status for the terminal and an indication of an associated reliability for the mobility status;
configuring the terminal device in a power saving state when the indication of the mobility status is a first setting and the indication of the reliability of the mobility status has a first setting; and
configuring the terminal device to make handover measurements when the indication of the mobility status is the first setting and the indication of the reliability of the mobility status has a second setting different from the first setting.
7. The method according to claim 6 , wherein the indication of the reliability for the mobility status includes a high setting as the first setting and a low setting as the second setting.
8. The method according to claim 6 , wherein the indication of the mobility status and the indication of the reliability of the mobility status are different.
9. The method according to claim 6 , wherein the indication of the mobility status is determined from a plurality of previously determined locations for the terminal device, and the indication of the reliability for the mobility status is determined from a plurality of previously determined locations for the terminal device.
10. The method according to claim 6 , wherein the mobility status for the terminal device is determined from the terminal device being connected to one or more base stations of the wireless telecommunications system, and the indication of the reliability for the mobility status is determined from the terminal device being connected to one or more base stations of the wireless telecommunications system.
11. A base station for communicating with a terminal device in a wireless telecommunications system, wherein the base station comprises a controller and a transceiver configured to operate together to:
receive from the terminal device an indication of a determined mobility status for the terminal and an indication of an associated reliability for the mobility status;
configure the terminal device in a power saving state when the indication of the mobility status is a first setting and the indication of the reliability of the mobility status has a first setting; and
configure the terminal device to make handover measurements when the indication of the mobility status is the first setting and the indication of the reliability of the mobility status has a second setting different from the first setting.
12. The base station according to claim 11 , wherein the indication of the reliability for the mobility status includes a high setting as the first setting and a low setting as the second setting.
13. The base station according to claim 11 , wherein the indication of the mobility status and the indication of the reliability of the mobility status are different.
14. The base station according to claim 11 , wherein the indication of the mobility status is determined from a plurality of previously determined locations for the terminal device, and the indication of the reliability for the mobility status is determined from a plurality of previously determined locations for the terminal device.