Method and apparatus for management of extended mobile device identity information
A method of operating a terminal device to establish a radio resource control connection with network infrastructure equipment in a wireless telecommunications network, wherein the terminal device is associated with a previously-allocated temporary identifier that identifies the terminal device within the wireless telecommunications network; the method comprising: transmitting a first message to the network infrastructure equipment comprising an indication of a first portion of the temporary identifier; and transmitting a second message, which is separate from the first message, to the network infrastructure equipment comprising an indication of a second portion of the temporary identifier.
1. A method of operating a terminal device to establish a radio connection with network infrastructure equipment in a wireless telecommunications network, wherein the terminal device is associated with a previously-allocated temporary identifier that identifies the terminal device within the wireless telecommunications network; the method comprising:
transmitting a first message to the network infrastructure equipment, the first message comprising a first indication of a first portion of the temporary identifier; and
transmitting a second message, which is separate from the first message, to the network infrastructure equipment, the second message comprising a second indication of a second portion of the temporary identifier different from the first portion of the temporary identifier,
wherein the size of the first message is predetermined, and
wherein the size of the second message is greater than the size of the first message and is not predetermined.
2. The method according to claim 1 , wherein the second message comprises a request for a service from a core network of the wireless telecommunications network.
3. The method according to claim 1 , wherein the first message is transmitted as part of a random access contention resolution procedure.
4. The method according to claim 1 , wherein the second message is transmitted after the completion of a contention resolution procedure.
5. The method according to claim 1 ,
wherein a first maximum length of the first portion is less than a total length of the temporary identifier, and
wherein a second maximum length of the second portion is less than the total length of the temporary identifier.
6. The method according to claim 1 , wherein the second message is an RRC connection setup complete message.
7. The method according to claim 1 ,
wherein the second message comprises a list of one or more network slice identifiers, and
wherein the indication of the second portion of the temporary identifier comprises a network slice identifier at a predetermined position in the list.
8. The method according to claim 7 , wherein the network slice identifier at the predetermined position in the list is associated with an access and mobility management function, AMF, in a core network of the wireless telecommunications network with which the terminal device has established a protocol data unit, PDU, session.
9. The method according to claim 1 ,
wherein the second message comprises an indication of a protocol data unit, PDU, session identity, and
wherein the indication of the second portion of the temporary identifier comprises the indication of the protocol data unit, PDU, session identity.
10. The method according to claim 1 , wherein the indication of the second portion of the temporary identifier comprises one of a tracking area identifier, an identifier of an access and mobility management function, AMF, in a core network of the wireless telecommunications network with which the terminal device is registered, and an identifier of a group of access and mobility management functions, the group including the access and mobility management function with which the terminal device is registered.
11. The method according to claim 1 , the method comprising:
transmitting a random access request message on a random access channel to the network infrastructure equipment of the wireless telecommunications network, and
receiving a random access response message from the network infrastructure equipment, wherein the first message is transmitted in response to receiving the random access response message.
12. The method according to claim 1 , further comprising the terminal device determining a size for the indication of the first portion of the temporary identifier based on the size of the first message.
13. The method according to claim 1 , wherein the temporary identifier is one of a system architecture evolution-temporary mobile subscriber identity, S-TMSI, and a 5G-S-TMSI, comprising at least 48 bits.
14. A method of operating a network infrastructure equipment of a wireless telecommunications network to establish a radio connection with a terminal device, wherein the terminal device is associated with a previously-allocated temporary identifier that identifies the terminal device within the wireless telecommunications network, the method comprising:
receiving a first message from the terminal device, the first message comprising a first indication of a first portion of the temporary identifier; and
receiving a second message, which is separate from the first message, from the terminal device, the second message comprising a second indication of a second portion of the temporary identifier different from the first portion of the temporary identifier,
wherein the size of the first message is predetermined, and
wherein the size of the second message is greater than the size of the first message and is not predetermined.
15. The method according to claim 14 , wherein the first message is transmitted as part of a random access contention resolution procedure.
16. The method according to claim 14 , wherein the second message is transmitted after the completion of a contention resolution procedure.
17. The method according to claim 14 ,
wherein a first maximum length of the first portion is less than a total length of the temporary identifier, and
wherein a second maximum length of the second portion is less than the total length of the temporary identifier.
18. The method according to claim 14 , wherein the second message is an RRC connection setup complete message.
19. The method according to claim 14 , wherein the second message comprises a request for a service from a core network of the wireless telecommunications network.
20. Circuitry for a terminal device for establishing a radio connection with network infrastructure equipment in a wireless telecommunications network, wherein the terminal device is associated with a previously-allocated temporary identifier that identifies the terminal device within the wireless telecommunications network; wherein the circuitry comprises controller circuitry and transceiver circuitry configured such that the terminal device is operable to:
transmit a first message to the network infrastructure equipment, the first message comprising a first indication of a first portion of the temporary identifier; and
transmit a second message, which is separate from the first message, to the network infrastructure equipment, the second message comprising a second indication of a second portion of the temporary identifier different from the first portion of the temporary identifier,
wherein the size of the first message is predetermined, and
wherein the size of the second message is greater than the size of the first message and is not predetermined.