Methods of resuming a radio bearer and related wireless terminals and network nodes

A wireless terminal (UE) configured to operate in a wireless communication network that includes a base station, the UE comprising:

• a transceiver configured to communicate with the base station;
• and
• processing circuitry operably coupled with the transceiver, whereby the processing circuitry and the transceiver are configured to:
• transmit, to the base station, a request to resume a suspended connection with the wireless communication network;
• subsequently receive, from the base station, a connection resume message;
• perform configuration of the connection based on the connection resume message,
• wherein performing the configuration comprises changing a security key previously used for the connection before the connection was suspended;
• resume a suspended radio bearer associated with the connection;
• and
• selectively transmit, to the base station, a connection resume complete message.

A method for a base station configured to operate in a wireless communication network, the method comprising:

• receiving, from a wireless terminal (UE), a request to resume a suspended connection with the wireless communication network;
• subsequently transmitting, to the wireless terminal, a connection resume message including one or more of the following:
• a security key derivation indicator,
• a first indication for the wireless terminal to delay resuming the suspended radio bearer until receipt of a connection reconfiguration message,
• the connection reconfiguration message, and
• a second indication of whether the wireless terminal should transmit a responsive connection resume complete message;
• and
• selectively receiving, from the wireless terminal, a connection resume complete message.