UE identifier in RRC resume

A wireless device for a wireless network, comprising:

• an interface operable to provide wireless communication between the wireless device and one or more network nodes;
• a processor;
• and
• storage comprising instructions executable by the processor to:
• receive, from a first network node via the interface, a first message that instructs the wireless device to suspend a connection between the wireless device and the wireless network where, upon receiving the first message, the wireless device stores a wireless device context of the wireless device and enters a suspended mode of operation;
• upon an occurrence of a triggering event, transmit, to a second network node via the interface, a second message that requests that the connection between the wireless device and the wireless network be resumed,
• wherein the second message is transmitted in an uplink common control channel service data unit, and a portion of the second message is provided by truncating the uplink common control channel service data unit to at least one of:
• 48 bits;
• or a size of an existing content resolution identity Medium Access Control (MAC) control element, and
• wherein the second message comprises a resume identifier comprising:
• a part that identifies the first network node to which the wireless device was connected upon suspending the connection;
• and a part that identifies the wireless device;
• and
• receive, from the second network node via the interface, a third message that indicates that the connection between the wireless device and the wireless network is being resumed using the stored wireless device context of the wireless device.

A method of operation of a network node in a wireless network, comprising:

• receiving, from a wireless device, a first message that requests that a connection between the wireless device and the wireless network be resumed,
• wherein the first message is transmitted in an uplink common control channel service data unit, and a portion of the first message is provided by truncating the uplink common control channel service data unit to at least one of:
• 48 bits;
• or a size of an existing content resolution identity Medium Access Control (MAC) control element, and
• wherein the first message comprises a resume identifier comprising:
• a part that identifies a network node to which the wireless device was connected upon suspending the connection;
• and a part that identifies the wireless device;
• obtaining, from the network node identified by the resume identifier, a wireless device context of the wireless device previously stored upon suspending the connection between the wireless device and the wireless network;
• and
• transmitting, to the wireless device, a second message that indicates that the connection between the wireless device and the wireless network is being resumed using the stored wireless device context of the wireless device.

A network node for a wireless network, comprising:

• an interface;
• a processor;
• and
• storage comprising instructions executable by the processor to:
• receive, from a wireless device via the interface, a first message that requests that a connection between the wireless device and the wireless network be resumed,
• wherein the first message is transmitted in an uplink common control channel service data unit, and a portion of the first message is provided by truncating the uplink common control channel service data unit to at least one of:
• 48 bits;
• or a size of an existing content resolution identity Medium Access Control (MAC) control element, and
• wherein the first message comprises a resume identifier comprising:
• a part that identifies a network node to which the wireless device was connected upon suspending the connection;
• and a part that identifies the wireless device;
• obtain, from the network node identified by the resume identifier, a wireless device context of the wireless device previously stored upon suspending the connection between the wireless device and the wireless network;
• and
• transmit, to the wireless device via the interface, a second message that indicates that the connection between the wireless device and the wireless network is being resumed using the stored wireless device context of the wireless device.