Handling of parameters provided in release / suspend
New Radio (NR) RRC includes an RRC_INACTIVE state, which introduces ambiguities in the network's knowledge of UE behavior. A mechanism is introduced for handling parameters received when a UE enters RRC_INACTIVE upon the UE attempting to resume an RRC connection and, as a response, receiving a Release or Suspend message. The timer associated to the mobilityControlInfo (equivalent to T320) is stopped and associated parameters discarded upon receiving RRC Release or Suspend. Information received in a Release or Suspend message is discarded upon receiving RRC Release or RRC Suspend.
1. A method of managing Radio Resource Control, RRC, states, performed by a wireless device operative in a wireless communication network, the method comprising:
while in an RRC_INACTIVE state, and performing activities associated with dedicated idle or inactive mobility related parameters comprising performing cell reselection according to dedicated priorities while a validity timer of the cell reselection priority parameter is running, sending an RRC message to the network requesting to enter an RRC_CONNECTED state;
receiving, in response to the RRC message requesting to enter an RRC_CONNECTED state, an RRC message from the network directing the wireless device to remain in RRC_INACTIVE state;
in response to the received RRC message:
discarding one or more stored dedicated idle or inactive mobility related parameters; and
discontinuing the activities associated with the dedicated idle or inactive mobility related parameters.
2. The method of claim 1 wherein performing actions related to idle or inactive mobility comprises performing cell reselection according to dedicated priorities.
3. The method of claim 2 wherein performing cell reselection according to dedicated priorities comprises performing cell reselection while a validity timer of the cell reselection priority parameter is running.
4. The method of claim 1 wherein the idle or inactive mobility related parameters comprise mobility control information.
5. The method of claim 1 wherein the idle or inactive mobility related parameters comprise redirection carrier information.
6. The method of claim 1 wherein the idle or inactive mobility related parameters comprise cell reselection priority information.
7. The method of claim 1 wherein the idle or inactive mobility related parameters comprise cell quality derivation parameters.
8. A wireless device operative to manage Radio Resource Control, RRC, states, while operative in a wireless communication network, comprising:
communication circuitry; and
processing circuitry operatively connected to the communication circuitry, and adapted to:
while in an RRC_INACTIVE state, and performing activities associated with dedicated idle or inactive mobility related parameters comprising performing cell reselection according to dedicated priorities while a validity timer of the cell reselection priority parameter is running, send an RRC message to the network requesting to enter an RRC_CONNECTED state;
receive, in response to the RRC message requesting to enter an RRC_CONNECTED state, an RRC message from the network directing the wireless device to remain in RRC_INACTIVE state;
in response to the received RRC message
discard one or more stored dedicated idle or inactive mobility related parameters; and
discontinue the activities associated with the dedicated idle or inactive mobility related parameters.
9. The wireless device of claim 8 wherein the processing circuitry is adapted to perform actions related to idle or inactive mobility by performing cell reselection according to dedicated priorities.
10. The wireless device of claim 9 wherein performing cell reselection according to dedicated priorities comprises performing cell reselection while a validity timer of the cell reselection priority parameter is running.
11. The wireless device of claim 8 wherein the idle or inactive mobility related parameters comprise mobility control information.
12. The wireless device of claim 8 wherein the idle or inactive mobility related parameters comprise redirection carrier information.
13. The wireless device of claim 8 wherein the idle or inactive mobility related parameters comprise cell reselection priority information.
14. The wireless device of claim 8 wherein the idle or inactive mobility related parameters comprise cell quality derivation parameters.
15. A method of managing a wireless device, performed by a base station operative in a wireless communication network implementing a Radio Resource Control (RCC) protocol, the method comprising:
receiving from a wireless device in RRC_INACTIVE state and performing activities associated with dedicated idle or inactive mobility related parameters comprising the wireless device performing cell reselection according to dedicated priorities while a validity timer of the cell reselection priority parameter is running, an RRC message requesting to enter an RRC_CONNECTED state;
in response to the RRC message requesting to enter an RRC_CONNECTED state, sending an RRC message to the wireless device directing the wireless device to remain in RRC_INACTIVE state;
wherein the base station manages the wireless device assuming that, in response to the RRC message received by the wireless device, it discards one or more stored idle or inactive mobility related parameters;
wherein the base station manages the wireless device assuming that, in response to the RRC message received by the wireless device, it discontinues the activities associated with the idle or inactive mobility related parameters.
16. The method of claim 15 wherein an idle or inactive mobility related parameter stored by the wireless device is controlled by a timer, and wherein the timer was running at the time the wireless device sent RRC signaling to the network requesting to enter an RRC_CONNECTED state, further comprising:
managing the wireless device assuming that, in response to the RRC signaling received by the wireless device, it stops the timer and discontinues activities associated with the timer.
17. The method of claim 15 wherein the idle or inactive mobility related parameters comprise mobility control information.
18. The method of claim 15 wherein the idle or inactive mobility related parameters comprise redirection carrier information.
19. The method of claim 15 wherein the idle or inactive mobility related parameters comprise cell reselection priority information.
20. The method of claim 15 wherein the idle or inactive mobility related parameters comprise cell quality derivation parameters.
21. A base station operative in a wireless communication network implementing a Radio Resource Control (RCC) protocol comprising:
communication circuitry; and
processing circuitry operatively connected to the communication circuitry, and adapted to:
receive from a wireless device in RRC_INACTIVE state and performing activities associated with dedicated idle or inactive mobility related parameters comprising the wireless device performing cell reselection according to dedicated priorities while a validity timer of the cell reselection priority parameter is running, an RRC message requesting to enter an RRC_CONNECTED state;
in response to the RRC message requesting to enter an RRC_CONNECTED state, send an RRC message to the wireless device directing the wireless device to remain in RRC_INACTIVE state;
manage the wireless device assuming that, in response to the RRC message received by the wireless device, it discards one or more stored idle or inactive mobility related parameters; and
manage the wireless device assuming that, in response to the RRC message received by the wireless device, it discontinues the activities associated with the idle or inactive mobility related parameters.
22. The base station of claim 21 wherein an idle or inactive mobility related parameter stored by the wireless device is controlled by a timer, and wherein the timer was running at the time the wireless device sent RRC signaling to the network requesting to enter an RRC_CONNECTED state, wherein the processing circuitry is further adapted to:
manage the wireless device assuming that, in response to the RRC signaling received by the wireless device, it stops the timer and discontinues activities associated with the timer.
23. The base station of claim 21 wherein the idle or inactive mobility related parameters comprise one or more of mobility control information, redirection carrier information, cell reselection priority information, and cell quality derivation parameters.