Data transmission using store and forward satellites

1 . A user equipment (UE) configured for wireless communications, the UE comprising:

a memory comprising computer-executable instructions; and

at least one processor configured to execute the computer-executable instructions and cause the UE to:

obtain information of one or more non-terrestrial network (NTN) entities configured to store UE data;

select one of the one or more NTN entities based on the information;

obtain a first cell barring indication indicating the one or more NTN entities are barred;

obtain a second cell barring indication indicating whether one or more of the one or more NTN entities are barred;

follow only the first cell barring indication when the UE does not support store and forward operation and following only the second cell barring indication when the UE supports store and forward operation; and

output uplink data to the NTN entity.

2 . The UE of claim 1 , wherein the information for each of the one or more NTN entities comprises at least one of: an amount of UE data the NTN entity is configured to store or a duration the NTN entity is configured to store the UE data.

3 . The UE of claim 2 , wherein the at least one of: the amount of UE data the NTN entity is configured to store or the duration the NTN entity is configured to store the UE data is associated with a quality-of-service (QOS) of the UE data or of a logical channel.

4 . The UE of claim 2 , wherein the at least one of: the amount of UE data the NTN entity is configured to store or the duration the NTN entity is configured to store the UE data is associated with at least one of: a priority of the UE data or a priority of the UE.

5 . The UE of claim 2 , wherein the at least one of: the amount of UE data the NTN entity is configured to store or the duration the NTN entity is configured to store the UE data is UE specific.

6 . The UE of claim 2 , wherein the at least one of: the amount of UE data the NTN entity is configured to store or the duration the NTN entity is configured to store the UE data is NTN entity specific.

7 . The UE of claim 2 , wherein the at least one of: the amount of UE data the NTN entity is configured to store or the duration the NTN entity is configured to store the UE data is cell specific.

8 . The UE of claim 2 , wherein the at least one of: the amount of UE data the NTN entity is configured to store or the duration the NTN entity is configured to store the UE data comprises a first amount of downlink UE data the NTN entity is configured to store or the duration the NTN entity is configured to store the downlink UE data and a second amount of uplink UE data the NTN entity is configured to store or the duration the NTN entity is configured to store the uplink UE data.

9 . The UE of claim 2 , wherein the at least one processor being configured to cause the UE to obtain the information of the one or more NTN entities comprises the at least one processor being configured to cause the UE to obtain a broadcast system information block (SIB) indicating the one or more of: the amount of UE data the NTN entity is configured to store or the duration the NTN entity is configured to store the UE data.

10 . The UE of claim 2 , wherein the at least one processor being configured to cause the UE to obtain the information of the one or more NTN entities comprises the at least one processor being configured to cause the UE to obtain dedicated signaling indicating the one or more of: the amount of UE data the NTN entity is configured to store or the duration the NTN entity is configured to store the UE data.

11 . The UE of claim 2 , wherein the at least one processor being configured to cause the UE to obtain the information of the one or more NTN entities comprises the at least one processor being configured to cause the UE to obtain the amount of UE data the NTN entity is configured to store.

12 . The UE of claim 11 , wherein the at least one processor is further configured to cause the UE to, before initiating random access with an NTN entity of the one or more NTN entities, determine whether an amount of uplink data at the UE is larger than the amount of UE data the NTN entity is configured to store.

13 . The UE of claim 12 , wherein the at least one processor is further configured to cause the UE to select a different NTN entity when the amount of uplink data at the UE is larger than the amount of UE data the NTN entity is configured to store.

14 . The UE of claim 12 , wherein the at least one processor is further configured to cause the UE to request a larger amount of uplink data the NTN entity when the amount of uplink data at the UE is larger than the amount of UE data the NTN entity is configured to store.

15 . The UE of claim 12 , wherein the at least one processor is further configured to cause the UE to restrict an amount of the uplink data sent to the NTN entity when the amount of uplink data at the UE is larger than the amount of UE data the NTN entity is configured to store.

16 . The UE of claim 12 , wherein the at least one processor is further configured to cause the UE to initiate random access with the NTN entity when the amount of uplink data at the UE is equal to or smaller than the amount of UE data the NTN entity is configured to store.

17 . The UE of claim 2 , wherein the at least one processor being configured to cause the UE to obtain the information of the one or more NTN entities comprises wherein the at least one processor being configured to cause the UE to obtain the duration the NTN entity is configured to store the UE data.

18 . The UE of claim 17 , wherein the at least one processor is further configured to cause the UE to select an NTN entity to initiate random access with based on the duration the NTN entity is configured to store the UE data.

19 . The UE of claim 18 , wherein the at least one processor being configured to cause the UE to select the NTN entity to initiate random access with comprises the at least one processor being configured to cause the UE to select an NTN entity with a shorter data storage duration when the UE has uplink data with a delay target.

20 . The UE of claim 18 , wherein the at least one processor being configured to cause the UE to select the NTN entity to initiate random access with comprises the at least one processor being configured to cause the UE to select an NTN entity with a longer data storage duration when the UE has delay sensitive uplink data.

21 . The UE of claim 2 , wherein the at least one of: the amount of UE data the NTN entity is configured to store or the duration the NTN entity is configured to store the UE data is logical channel specific.

22 . The UE of claim 21 , wherein the at least one processor is further configured to cause the UE to obtain an indication for each of a plurality of logical channels whether the one or more of: the amount of UE data the NTN entity is configured to store for the logical channel or whether the duration the NTN entity is configured to store the UE data applies to the logical channel.

23 . The UE of claim 21 , wherein the at least one processor is further configured to cause the UE to select a logical channel of a plurality of logical channels for outputting uplink data to an NTN entity of the one or more NTN entities based on whether the logical channel satisfies the amount of UE data the NTN entity is configured to store or the duration the NTN entity is configured to store the UE data.

24 . The UE of claim 1 , wherein the at least one processor is further configured to cause the UE to obtain assistance information from a serving NTN entity indicating information of one or more neighboring NTN entities, wherein the information includes a frequency, a cell identifier (ID), an amount of UE data the NTN entity is configured to store, a duration the NTN entity is configured to store the UE data, a next feeder link availability time, a time of a next visit to store and forward service area, of the one or more neighboring NTN entities, or a combination thereof.

25 . The UE of claim 1 , wherein the at least one processor is further configured to cause the UE to:

output uplink data to one of the one or more NTN entities; and

output an indication of whether the UE expects a response to the uplink data from the NTN entity or another NTN entity.

26 . The UE of claim 25 , wherein the at least one processor is further configured to cause the UE to obtain an indication of at least one of: a time to monitor the response to the uplink data or an NTN entity to monitor a response to the uplink data.

27 . A method for wireless communication by a user equipment (UE), the method comprising:

obtaining information of one or more non-terrestrial network (NTN) entities configured to store UE data;

selecting one of the one or more NTN entities based on the information;

obtaining a first cell barring indication indicating the one or more NTN entities are barred;

obtaining a second cell barring indication indicating whether one or more of the one or more NTN entities are barred;

following only the first cell barring indication when the UE does not support store and forward operation and following only the second cell barring indication when the UE supports store and forward operation; and

outputting uplink data to the NTN entity.

28 . A network entity configured for wireless communications, the network entity comprising:

a memory comprising computer-executable instructions; and

at least one processor configured to execute the computer-executable instructions and cause the network entity to:

output information to a user equipment (UE) of one or more non-terrestrial network (NTN) entities configured to store UE data, including the NTN entity;

output to the UE a first cell barring indication indicating the one or more NTN entities are barred when the UE does not support store and forward operation; and

output to the UE a second cell barring indication indicating whether one or more of the one or more NTN entities are barred when the UE supports store and forward operation.

29 . A method for wireless communication by a network entity, the method comprising:

outputting information to a user equipment (UE) of one or more non-terrestrial network (NTN) entities configured to store UE data, including the NTN entity;

outputting to the UE a first cell barring indication indicating the one or more NTN entities are barred when the UE does not support store and forward operation; and

outputting to the UE a second cell barring indication indicating whether one or more of the one or more NTN entities are barred when the UE supports store and forward operation.