SYSTEMS AND METHODS FOR SUPPORT OF A 5G SATELLITE RADIO ACCESS TECHNOLOGY

1 . A method for supporting satellite wireless access for a user equipment (UE) from a first satellite, the method comprising:

obtaining information that defines each of one or more virtual cells or virtual tracking areas or both as a respective fixed geographic area located within wireless coverage of the first satellite and associated with one or more public land mobile networks (PLMNs), at least one of the one or more virtual cells or the virtual tracking areas being outside radio coverage of any terrestrial base station, by receiving broadcast data from the first satellite, wherein the broadcast data includes the information;

obtaining a position of the UE;

enabling a determination of a serving virtual cell or a virtual tracking area in which the UE is located, the determination based on the obtained position of the UE and the information; and

performing, via the first satellite and a serving satellite Radio Access Network (RAN) node (SRN) communicatively coupled with the first satellite, a registration of the UE with at least one of the one or more PLMNs, based at least in part on the determined serving virtual cell or virtual tracking area.

2 . The method of claim 1 , wherein enabling the determination of the serving virtual cell or the virtual tracking area in which the UE is located comprises:

establishing a signaling connection with the SRN for a PLMN that is accessible from the first satellite; and

sending the position of the UE to the SRN, wherein the SRN determines the serving virtual cell or the virtual tracking area in which the UE is located based on the position of the UE.

3 . The method of claim 1 , wherein:

the information comprises at least one of:

locations of grid points in an array of grid points, wherein the array of grid points comprises additional grid points assigned to virtual cells on each side of an international border so that a closest grid point to any location is in a same country as that location;

virtual cell identifiers associated with the grid points;

tracking area identifiers associated with one or more of the virtual tracking areas, the virtual cell identifiers or the grid points; or

PLMN identifiers associated with one or more of the grid points, the virtual cell identifiers or the tracking area identifiers; and

enabling the determination of the serving virtual cell or virtual tracking area in which the UE is located comprises enabling the determination of a grid point that is closest to the position of the UE, wherein the serving virtual cell or virtual tracking area in which the UE is located is associated with a grid point that is closest to the position of the UE.

4 . The method of claim 3 , wherein enabling the determination of the serving virtual cell or the virtual tracking area in which the UE is located further comprises:

enabling the determination of a country in which the UE is located; and

enabling the determination of a grid point that is in the country in which the UE is located and that is closest to the position of the UE, wherein the serving virtual cell or the virtual tracking area in which the UE is located is associated with a grid point that is closest to the position of the UE and that is in the country in which the UE is located.

5 . The method of claim 1 , further comprising:

receiving information for the first satellite, the information for the first satellite comprising identifiers for one or more SRNs, locations of ground stations for the one or more SRNs, wherein the ground stations are in wireless coverage of the first satellite, and a list of virtual tracking areas and corresponding PLMNs that are in the wireless coverage of the first satellite, wherein the PLMNs are accessible from the one or more SRNs; and

obtaining the serving SRN by determining the serving SRN as an SRN from the one or more SRNs with a ground station that is closest to the position of the UE.

6 . The method of claim 5 , further comprising:

providing periodic measurements of visible satellites to the serving SRN;

receiving instructions from the serving SRN for handover from the first satellite to a second satellite; and

performing the handover from the first satellite to the second satellite.

7 . The method of claim 1 , further comprising:

entering an idle state; and

camping on a second satellite for which the UE has signal reception and that indicates coverage of the virtual tracking area in which the UE is located.

8 . The method of claim 2 , wherein the first satellite provides signal reception and access to a preferred PLMN and the SRN is associated with the preferred PLMN.

9 . The method of claim 1 , wherein the at least one of the one or more PLMNs is associated with the serving virtual cell.

10 . The method of claim 9 , further comprising:

initiating an emergency (EM) call to a public safety answering point (PSAP) associated with the serving virtual cell comprising:

obtaining an emergency session through the first satellite via a first entity in a serving core network in a serving PLMN;

performing an emergency registration with a second entity in the serving PLMN; and

sending an emergency call to the second entity in the serving PLMN, wherein the emergency call includes an identifier for the serving virtual cell, wherein the second entity routes the emergency call to the PSAP associated with the identifier for the serving virtual cell.

11 . The method of claim 9 , wherein Lawful Interception (LI) associated with the serving virtual cell is supported by an entity in a serving core network in a serving PLMN by providing information for the UE including a location of the serving virtual cell to a law enforcement agency.

12 . The method of claim 9 , further comprising:

supporting Wireless Emergency Alerting (WEA) associated with the serving virtual cell comprising receiving from the first satellite and displaying to a user of the UE a WEA message associated with the serving virtual cell.

13 . The method of claim 12 , further comprising:

receiving a broadcast from the first satellite for each of one or more virtual cells within the wireless coverage area of the first satellite, wherein the broadcast associated with the serving virtual cell contains one or more WEA messages assigned to the serving virtual cell.

14 . The method of claim 12 , further comprising:

receiving a broadcast from the first satellite that contains all WEA messages for virtual cells within the wireless coverage area of the first satellite, wherein each WEA message includes one or more virtual cell identifiers for which it is applicable or each WEA message includes an associated reference identifier; and

receiving a second broadcast from the first satellite that contains one or more reference identifiers associated with the serving virtual cell.

15 . A user equipment (UE) configured to support satellite wireless access, comprising:

a satellite transceiver configured to communicate with satellites;

at least one memory; and

at least one processor coupled to the satellite transceiver and the at least one memory, the at least one processor configured to:

obtain information that defines each of one or more virtual cells or virtual tracking areas or both as a respective fixed geographic area located within wireless coverage of a first satellite and associated with one or more public land mobile networks (PLMNs), at least one of the one or more virtual cells or the virtual tracking areas being outside radio coverage of any terrestrial base station, by receiving broadcast data from the first satellite, wherein the broadcast data includes the information;

obtain a position of the UE;

enable a determination of a serving virtual cell or a virtual tracking area in which the UE is located, the determination based on the obtained position of the UE and the information; and

perform, via the first satellite and a serving satellite Radio Access Network (RAN) node (SRN) communicatively coupled with the first satellite, a registration of the UE with at least one of the one or more PLMNs, based at least in part on the determined serving virtual cell or virtual tracking area.

16 . The UE of claim 15 , wherein the at least one processor is configured to enable the determination of the serving virtual cell or the virtual tracking area in which the UE by:

establishing a signaling connection with the SRN for a PLMN that is accessible from the first satellite; and

sending the position of the UE to the SRN, wherein the SRN determines the serving virtual cell or the virtual tracking area in which the UE is located based on the position of the UE.

17 . The UE of claim 15 , wherein:

the information further comprises at least one of:

locations of grid points in an array of grid points, wherein the array of grid points comprises additional grid points assigned to virtual cells on each side of an international border so that a closest grid point to any location is in a same country as that location;

virtual cell identifiers associated with the grid points;

tracking area identifiers associated with one or more of the virtual tracking areas, the virtual cell identifiers or the grid points; or

PLMN identifiers associated with one or more of the grid points, the virtual cell identifiers or the tracking area identifiers; and

the at least one processor is further configured to enable the determination of the serving virtual cell or virtual tracking area in which the UE is located by enabling the determination of a grid point that is closest to the position of the UE, wherein the serving virtual cell or virtual tracking area in which the UE is located is associated with a grid point that is closest to the position of the UE.

18 . The UE of claim 15 , wherein the at least one processor is further configured to enable the determination of the serving virtual cell or virtual tracking area in which the UE is located by:

enabling the determination of a country in which the UE is located; and

enabling the determination of a grid point that is in the country in which the UE is located and that is closest to the position of the UE, wherein the serving virtual cell or the virtual tracking area in which the UE is located is associated with a grid point that is closest to the position of the UE and that is in the country in which the UE is located.

19 . The UE of claim 15 , wherein the at least one processor is further configured to:

receive information for the first satellite, the information for the first satellite comprising identifiers for one or more SRNs, locations of ground stations for the one or more SRNs, wherein the ground stations are in wireless coverage of the first satellite, and a list of virtual tracking areas and corresponding PLMNs that are in the wireless coverage of the first satellite, wherein the PLMNs are accessible from the one or more SRNs; and

obtain the serving SRN by determining the serving SRN as an SRN from the one or more SRNs with a ground station that is closest to the position of the UE.

20 . The UE of claim 19 , wherein the at least one processor is further configured to:

provide periodic measurements of visible satellites to the serving SRN;

receive instructions from the serving SRN for handover from the first satellite to a second satellite; and

perform the handover from the first satellite to the second satellite.

21 . The UE of claim 15 , wherein the at least one processor is further configured to:

enter an idle state; and

camp on a second satellite for which the UE has signal reception and that indicates coverage of the virtual tracking area in which the UE is located.

22 . The UE of claim 16 , wherein the first satellite provides signal reception and access to a preferred PLMN and the SRN is associated with the preferred PLMN.

23 . The UE of claim 15 , wherein the at least one of the one or more PLMNs is associated with the serving virtual cell.

24 . The UE of claim 23 , wherein the at least one processor is further configured to:

initiate an emergency (EM) call to a public safety answering point (PSAP) associated with the serving virtual cell comprising:

obtain an emergency session through the first satellite via a first entity in a serving core network in a serving PLMN;

perform an emergency registration with a second entity in the serving PLMN; and

send an emergency call to the second entity in the serving PLMN, wherein the emergency call includes an identifier for the serving virtual cell, wherein the second entity routes the emergency call to the PSAP associated with the identifier for the serving virtual cell.

25 . The UE of claim 23 , wherein Lawful Interception (LI) associated with the serving virtual cell is supported by an entity in a serving core network in a serving PLMN by providing information for the UE including a location of the serving virtual cell to a law enforcement agency.

26 . The UE of claim 23 , wherein the at least one processor is further configured to:

support Wireless Emergency Alerting (WEA) associated with the serving virtual cell comprising receiving from the first satellite and displaying to a user of the UE a WEA message associated with the serving virtual cell.

27 . The UE of claim 26 , wherein the at least one processor is further configured to:

receive a broadcast from the first satellite for each of one or more virtual cells within the wireless coverage area of the first satellite, wherein the broadcast associated with the serving virtual cell contains one or more WEA messages assigned to the serving virtual cell.

28 . The UE of claim 26 , wherein the at least one processor is further configured to:

receive a broadcast from the first satellite that contains all WEA messages for virtual cells within the wireless coverage area of the first satellite, wherein each WEA message includes one or more virtual cell identifiers for which it is applicable or each WEA message includes an associated reference identifier; and

receive a second broadcast from the first satellite that contains one or more reference identifiers associated with the serving virtual cell.

29 . A user equipment (UE) configured to support satellite wireless access, comprising:

means for obtaining information that defines each of one or more virtual cells or virtual tracking areas or both as a respective fixed geographic area located within wireless coverage of a first satellite and associated with one or more public land mobile networks (PLMNs), at least one of the one or more virtual cells or the virtual tracking areas being outside radio coverage of any terrestrial base station, by receiving broadcast data from the first satellite, wherein the broadcast data includes the information;

means for obtaining a position of the UE;

means for enabling a determination of a serving virtual cell or a virtual tracking area in which the UE is located, the determination based on the obtained position of the UE and the information; and

means for performing, via the first satellite and a serving satellite Radio Access Network (RAN) node (SRN) communicatively coupled with the first satellite, a registration of the UE with at least one of the one or more PLMNs, based at least in part on the determined serving virtual cell or virtual tracking area.

30 . A non-transitory storage medium including program code stored thereon, the program code being operable to configure at least one processor in a user equipment (UE) to support satellite wireless access and comprising:

program code to obtain information that defines each of one or more virtual cells or virtual tracking areas or both as a respective fixed geographic area located within wireless coverage of a first satellite and associated with one or more public land mobile networks (PLMNs), at least one of the one or more virtual cells or the virtual tracking areas being outside radio coverage of any terrestrial base station, by receiving broadcast data from the first satellite, wherein the broadcast data includes the information;

program code to obtain a position of the UE;

program code to enable a determination of a serving virtual cell or a virtual tracking area in which the UE is located, the determination based on the obtained position of the UE and the information; and

program code to perform, via the first satellite and a serving satellite Radio Access Network (RAN) node (SRN) communicatively coupled with the first satellite, a

registration of the UE with at least one of the one or more PLMNs, based at least in part on the determined serving virtual cell or virtual tracking area.