UE identifier in RRC resume
Systems and methods relating to resuming a suspended connection of a wireless device in a wireless system are disclosed. In some embodiments, a method of operation of a wireless device includes receiving, from a wireless network, a first message that indicates to suspend a connection between the wireless device and the wireless network. Responsive to receiving the first message, the wireless devices stores a wireless device context and enters a suspended mode of operation. Upon an occurrence of a triggering event, the wireless device transmits, to the wireless network, a second message that requests to resume the connection between the wireless device and the wireless network, wherein the second message includes a resume identifier having an identifier of a network node and an identifier of the wireless device. The wireless device receives, from the wireless network, a contention resolution identity Medium Access Control (MAC) control element that includes a portion of the second message.
1. A method of operation of a wireless device, comprising:
receiving, from a wireless network, a first message that indicates to suspend a connection between the wireless device and the wireless network;
responsive to receiving the first message, storing a wireless device context and entering a suspended mode of operation;
upon an occurrence of a triggering event, transmitting, to the wireless network, a second message that requests to resume the connection between the wireless device and the wireless network, wherein the second message comprises a resume identifier including: an identifier of a network node; and an identifier of the wireless device; and
receiving, from the wireless network, a contention resolution identity Medium Access Control (MAC) control element that includes a portion of the second message, wherein the portion of the second message is a truncated second message, truncated to a number of bits that is equal in size of the contention resolution identity MAC control element.
2. The method of claim 1 , wherein the portion of the second message that is received from the wireless network corresponds to the resume identifier.
3. The method of claim 1 , further comprising:
performing contention resolution by matching the resume identifier with the portion of the second message.
4. The method of claim 1 , wherein the size of the contention resolution identity MAC control element is 48 bits.
5. The method of claim 1 , wherein the portion of the second message is transmitted in an uplink common control channel service data unit.
6. The method of claim 1 , wherein the second message comprises an RRC Connection Resume Request.
7. The method of claim 1 , wherein the second message is transmitted in an uplink common control channel service data unit.
8. The method of claim 1 , wherein the contention resolution identity MAC control element is associated with a third message that indicates that the connection between the wireless device and the wireless network is to be resumed.
9. The method of claim 1 , wherein the stored wireless device context is used for resuming the connection.
10. A wireless device, comprising:
a non-transitory memory; and
one or more hardware processors coupled to the non-transitory memory and configured to read instructions from the non-transitory memory to cause the wireless device to perform operations comprising:
receiving, from a wireless network, a first message that indicates to suspend a connection between the wireless device and the wireless network;
responsive to receiving the first message, storing a wireless device context and entering a suspended mode of operation;
upon an occurrence of a triggering event, transmitting, to the wireless network, a second message that requests to resume the connection between the wireless device and the wireless network, wherein the second message comprises a resume identifier including: an identifier of a network node; and an identifier of the wireless device; and
receiving, from the wireless network, a contention resolution identity Medium Access Control (MAC) control element that includes a portion of the second message, wherein the portion of the second message is a truncated second message, truncated to a number of bits that is equal in size of the contention resolution identity MAC control element.
11. The wireless device of claim 10 , wherein the portion of the second message that is received from the wireless network corresponds to the resume identifier.
12. The wireless device of claim 10 , the operations further comprising: performing contention resolution by matching the resume identifier with the portion of the second message.
13. The wireless device of claim 10 , wherein the size of the contention resolution identity MAC control element is 48 bits.
14. The wireless device of claim 10 , wherein the portion of the second message is transmitted in an uplink common control channel service data unit.
15. The wireless device of claim 10 , wherein the contention resolution identity MAC control element is associated with a third message that indicates that the connection between the wireless device and the wireless network is to be resumed.
16. The wireless device of claim 10 , wherein the stored wireless device context is used for resuming the connection.
17. A method of operation of a network node, comprising:
providing, to a wireless device, a first message that indicates to suspend a connection between the wireless device and the network node;
upon an occurrence of a triggering event, receiving, from the wireless device, a second message that requests to resume the connection between the wireless device and the network node, wherein the second message comprises a resume identifier including: an identifier of the network node; and an identifier of the wireless device; and
providing, to the wireless device, a contention resolution identity Medium Access Control (MAC) control element that includes a portion of the second message, wherein the portion of the second message is a truncated second message, truncated to a number of bits that is equal in size of the contention resolution identity MAC control element.
18. The method of claim 17 , wherein the portion of the second message that is received from the wireless device corresponds to the resume identifier.
19. The method of claim 17 , wherein the size of the contention resolution identity MAC control element is 48 bits.
20. The method of claim 17 , wherein the portion of the second message is received in an uplink common control channel service data unit.
21. The method of claim 17 , wherein the second message comprises an RRC Connection Resume Request.
22. The method of claim 17 , wherein the second message is received in an uplink common control channel service data unit.
23. The method of claim 17 , wherein the contention resolution identity MAC control element is associated with a third message that indicates that the connection between the wireless device and the network node is to be resumed.
24. A network node, comprising:
a non-transitory memory; and
one or more hardware processors coupled to the non-transitory memory and configured to read instructions from the non-transitory memory to cause the network node to perform operations comprising:
providing, to a wireless device, a first message that indicates to suspend a connection between the wireless device and the network node;
upon an occurrence of a triggering event, receiving, from the wireless device, a second message that requests to resume the connection between the wireless device and the network node, wherein the second message comprises a resume identifier including:
an identifier of the network node; and an identifier of the wireless device; and
providing, to the wireless device, a contention resolution identity Medium Access Control (MAC) control element that includes a portion of the second message, wherein the portion of the second message is a truncated second message, truncated to a number of bits that is equal in size of the contention resolution identity MAC control element.
25. The network node of claim 24 , wherein the portion of the second message that is received from the wireless device corresponds to the resume identifier.
26. The network node of claim 24 , wherein the size of the contention resolution identity MAC control element is 48 bits.
27. The network node of claim 24 , wherein the portion of the second message is received in an uplink common control channel service data unit.
28. The network node of claim 24 , wherein the second message comprises an RRC Connection Resume Request.
29. The network node of claim 24 , wherein the second message is received in an uplink common control channel service data unit.
30. The network node of claim 24 , wherein the contention resolution identity MAC control element is associated with a third message that indicates that the connection between the wireless device and the network node is to be resumed.