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 method of operating a terminal device for communicating with a base station in a wireless telecommunications system, the method comprising:
determining a mobility status for the terminal device and an associated reliability for the determined mobility status;
conveying an indication of the mobility status and an indication of the reliability for the mobility status to the base station; and
configuring the terminal device 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, wherein there are a number of different ways for terminal devices operating in the wireless telecommunications system to determine their mobility status, and the indication of the reliability for the mobility status comprises an indication of the manner in which the mobility status has been determined.
2. The method according to claim 1 , wherein
configuring the terminal device 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 comprises receiving configuration information from the base station wherein the configuration information is determined by the base station in a manner that takes account of both the mobility status and the reliability for the mobility status.
3. The method of claim 1 , wherein
conveying the indication of the mobility status and the indication of the reliability for the mobility status to the base station comprises conveying an indication of a mobility status associated with a pre-defined reliability.
4. The method of claim 1 , wherein
the mobility status for the terminal device is predefined for the terminal device.
5. The method of claim 4 , wherein
an indication of the predefined mobility status for the terminal device is available to the base station and conveying the indication of the mobility status and the indication of the reliability for the mobility status to the base station comprises conveying an identifier for the terminal device.
6. The method of claim 4 , wherein
an indication of the predefined mobility status for the terminal device is stored in association with a network part of the wireless telecommunications system.
7. The method of claim 1 , wherein
the mobility status for the terminal device and the reliability for the mobility status is determined from a plurality of previously determined locations for the terminal device.
8. The method of claim 1 , wherein
the mobility status for the terminal device and the reliability for the mobility status is determined from the terminal device being connected to an element of its environment.
9. The method of claim 1 , wherein
the indication of mobility status for the terminal device and the indication of reliability for the mobility status is conveyed by the terminal device to the base station in response to the terminal device determining there has been a change in at least one of the mobility status the reliability for the terminal device as compared to a previously conveyed indication of mobility status for the terminal device or indication of reliability for the mobility status.
10. The method of claim 1 , wherein
configuring the terminal device 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 comprises configuring an aspect of the operation of the terminal device selected from the group comprising:
one or more parameters of a power saving state; and
measurement parameters and configuration.
11. The method of claim 1 , wherein
the indication of the mobility status and the indication of the reliability for the mobility status is conveyed to the base station during a radio resource connection setup procedure.
12. 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; and
configure the terminal device 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, wherein there are a number of different ways for terminal devices operating in the wireless telecommunications system to determine their mobility status, and the indication of the reliability for the mobility status comprises an indication of the manner in which the mobility status has been determined.
13. Circuitry for a terminal device communicating with a base station in a wireless telecommunications system, wherein the circuitry comprises:
a controller and a transceiver configured to operate together
cause the terminal device 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; and
configure the terminal device 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, wherein there are a number of different ways for terminal devices operating in the wireless telecommunications system to determine their mobility status, and the indication of the reliability for the mobility status comprises an indication of the manner in which the mobility status has been determined.
14. The circuitry of claim 13 , wherein
configuring the terminal device 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 comprises receiving configuration information from the base station wherein the configuration information is determined by the base station in a manner that takes account of both the mobility status and the reliability for the mobility status.
15. The circuitry of claim 13 , wherein
conveying the indication of the mobility status and the indication of the reliability for the mobility status to the base station comprises conveying an indication of a mobility status associated with a pre-defined reliability.
16. The circuitry of claim 1 , wherein
the mobility status for the terminal device is predefined for the terminal device.
17. The circuitry of claim 16 , wherein
an indication of the predefined mobility status for the terminal device is available to the base station and conveying the indication of the mobility status and the indication of the reliability for the mobility status to the base station comprises conveying an identifier for the terminal device.
18. The circuitry of claim 16 , wherein
an indication of the predefined mobility status for the terminal device is stored in association with a network part of the wireless telecommunications system.
19. The circuitry of claim 13 , wherein
the mobility status for the terminal device and the reliability for the mobility status is determined from a plurality of previously determined locations for the terminal device.
20. The circuitry of claim 13 , wherein
the mobility status for the terminal device and the reliability for the mobility status is determined from the terminal device being connected to an element of its environment.
21. The circuitry of claim 13 , wherein
the indication of mobility status for the terminal device and the indication of reliability for the mobility status is conveyed by the terminal device to the base station in response to the terminal device determining there has been a change in at least one of the mobility status the reliability for the terminal device as compared to a previously conveyed indication of mobility status for the terminal device or indication of reliability for the mobility status.