System information change notification for extended discontinuous reception
A UE in an eDRX cycle may miss an SI change notification because the UE's receiver may be powered down during the entire modification period prior to the SI change. An apparatus for wireless communication at a base station may transmit SI, change the SI during a period of eDRX by a UE, and transmit the changed SI. The apparatus ensures that a UE receives an SI change notification, even when performing eDRX, by transmitting at least one notification associated with the changed SI after the transmission of the changed SI and during a paging occasion for the UE. In another aspect, an apparatus for wireless communication at a UE enters into an eDRX cycle and receives, after an SI change, a notification associated with the SI change.
1. A method of wireless communication performed by a base station, comprising:
transmitting system information (SI);
changing the SI during a period of extended discontinuous reception (eDRX) by a user equipment;
transmitting the changed SI; and
transmitting a plurality of notifications associated with the changed SI after the transmission of the changed SI, wherein a first notification is transmitted during an invariant paging frame or an invariant paging occasion after the transmission of the changed SI and a second notification is transmitted during a paging occasion for the user equipment.
2. The method of claim 1 , wherein the plurality of notifications comprise a value that indicates the changed SI to which the notifications correspond.
3. The method of claim 2 , wherein the value comprises a value tag, and wherein the value tag is incremented with each change in SI.
4. The method of claim 1 , wherein the plurality of notifications comprise repetitions of a second SI change notification transmitted to a non-DRX UE.
5. The method of claim 1 , wherein the plurality of notifications are separate from a second SI change notification transmitted to a non-DRX UE.
6. An apparatus for wireless communication, comprising:
a memory; and
at least one processor coupled to the memory and configured to:
transmit system information (SI);
change the SI during a period of extended discontinuous reception (eDRX) by a user equipment;
transmit the changed SI; and
transmit a plurality of notifications associated with the changed SI after the transmission of the changed SI, wherein a first notification is transmitted during an invariant paging frame or an invariant paging occasion after the transmission of the changed SI and a second notification is transmitted during a paging occasion for the user equipment.
7. The apparatus of claim 6 , wherein the plurality of notifications comprise a value that indicates the changed SI to which the notifications correspond.
8. The apparatus of claim 7 , wherein the value comprises a value tag, and wherein the value tag is incremented with each change in SI.
9. The apparatus of claim 6 , wherein the plurality of notifications comprise repetitions of a second SI change notification transmitted to a non-DRX UE.
10. The apparatus of claim 6 , wherein the plurality of notifications are separate from a second SI change notification transmitted to a non-DRX UE.
11. A method of wireless communications performed by a user equipment (UE), comprising:
entering into an extended discontinuous reception (eDRX) cycle;
checking for a system information (SI) change notification at a plurality paging occasions, wherein the plurality of paging occasions comprises a first occasion including an invariant paging frame or an invariant paging occasion and a second occasion including a paging occasion for the user equipment; and
receiving, after the SI change during the eDRX cycle, a notification associated with the SI change, wherein the notification comprises a value that indicates the SI change to which the notification corresponds.
12. The method of claim 11 , the method further comprising:
determining if the value in the notification is different than a value associated with a previous notification; and
acquiring SI when the value in the notification is different than the value associated with the previous notification.
13. The method of claim 12 , wherein the value comprises a value tag, and wherein the value tag is incremented with each change in SI.
14. The method of claim 11 , wherein the notification is received during the invariant paging frame or the invariant paging occasion.
15. The method of claim 11 , wherein the notification is received during the paging occasion for the UE.
16. The method of claim 11 , wherein the notification comprises a repetition of a second SI change notification transmitted to a non-DRX UE.
17. The method of claim 11 , wherein the notification is separate from a second SI change notification transmitted to a non-DRX UE.
18. An apparatus for wireless communication at a user equipment (UE), comprising:
a memory; and
at least one processor coupled to the memory and configured to:
enter into an extended discontinuous reception (eDRX) cycle;
check for a system information (SI) change notification at a plurality paging occasions, wherein the plurality of paging occasions comprises a first occasion including an invariant paging frame or an invariant paging occasion and a second occasion including a paging occasion for the user equipment; and
receive, after the SI, a notification associated with the SI change, wherein the notification comprises a value that indicates the SI change to which the notification corresponds.
19. The apparatus of claim 18 , the at least one processor being further configured to:
determine if the value in the notification is different than a value associated with a previous notification; and
acquire SI when the value in the notification is different than the value associated with the previous notification.
20. The apparatus of claim 19 , wherein the value comprises a value tag, and wherein the value tag is incremented with each change in SI.
21. The apparatus of claim 18 , wherein the notification is received during the invariant paging frame or the invariant paging occasion.
22. The apparatus of claim 18 , wherein the notification is received during the paging occasion for the UE.
23. The apparatus of claim 18 , wherein the notification comprises a repetition of a second SI change notification transmitted to a non-DRX UE.
24. The apparatus of claim 18 , wherein the notification is separate from a second SI change notification transmitted to a non-DRX UE.