Granted Patent B2

US 12,732,879 · App. 18/541,944 · Granted Sep 8, 2026

Inventors: Nishant (Bangalore, IN); Siddharth Shukla (Bangalore, IN); Amit Anandrao Dange (Bangalore, IN); Vivek Murugaiyan (Bangalore, IN); Kailash Kumar Jha (Bangalore, IN); Mohammad Umair (Bangalore, IN)

Assignee: Samsung Electronics Co., Ltd.

H04W36/083H04W36/0061H04W36/362

Abstract

Claims (76)

1 . A method performed by a user equipment (UE) for selecting a non-terrestrial network (NTN) cell, the method comprising:

receiving one or more system parameters including ephemeris information from a serving NTN cell and a plurality of NTN neighbor cells;

determining trajectory information about the plurality of NTN neighbor cells based on the one or more received system parameters;

determining trajectory information about the UE based on global positioning system (GPS) information of the UE; and

selecting the NTN cell among the plurality of NTN neighbor cells to perform at least one of a cell reselection or a conditional hand over (CHO), wherein the selected NTN cell is determined based on the determined trajectory information about the plurality of NTN neighbor cells, and the determined trajectory information about the UE.

2 . The method of claim 1 , further comprising:

determining a service time duration for each of the plurality of NTN neighbor cells-based on the one or more received system parameters,

wherein the NTN cell among the plurality of NTN neighbor cells to perform at least one of the cell reselection or the CHO is selected further based on the determined service time duration for each of the plurality of NTN neighbor cells.

3 . The method of claim 2 , wherein the selecting of the NTN cell among the plurality of NTN neighbor cells comprises:

ranking the service time duration for each of the plurality of NTN neighbor cells in a descending order, wherein a first NTN neighbor cell among the plurality of NTN neighbor cells has a first service time duration that is highest among other service time durations of other NTN neighbor cells of the plurality of NTN neighbor cells;

determining, based on trajectory information about the first NTN neighbor cell and the determined trajectory information about the UE, whether a future interaction occurs between the first NTN neighbor cell and the UE;

storing, in response to determining that the future interaction occurs between the first NTN neighbor cell and the UE, information associated with the future interaction which occurs between the first NTN neighbor cell and the UE in a database associated with the UE;

determining, in response to determining that the future interaction occurs between the first NTN neighbor cell and the UE, one or more future interaction parameters associated with the first NTN neighbor cell; and

selecting the NTN cell among the plurality of NTN neighbor cells based on the one or more determined future interaction parameters.

4 . The method of claim 3 , further comprising:

detecting a second service time duration associated with a second NTN neighbor cell among the plurality of NTN neighbor cells, wherein the second service time duration is a next highest service time duration among other service time durations of other NTN neighbor cells of the plurality of NTN neighbor cells;

determining, based on trajectory information about the second NTN neighbor cell and the determined trajectory information about the UE, whether a future interaction occurs between the second NTN neighbor cell and the UE;

storing, in response to determining that the future interaction occurs between the second NTN neighbor cell and the UE, information associated with the future interaction which occurs between the second NTN neighbor cell and the UE in the database associated with the UE;

determining, in response to determining that the future interaction occurs between the second NTN neighbor cell and the UE, one or more future interaction parameters associated with the first NTN neighbor cell and the second NTN neighbor; and

selecting the NTN cell among the plurality of NTN neighbor cells based on the one or more determined future interaction parameters.

5 . The method of claim 4 , wherein the one or more determined future interaction parameters comprise at least one of a first service time value corresponding to the first NTN neighbor cell, a second service time value corresponding to the second NTN neighbor cell, a first-time value, a second-time value, a first difference value, or a second difference value.

6 . The method of claim 5 ,

wherein the first-time value represents an amount of time taken by the UE to reach at a first location associated with the first NTN neighbor cell,

wherein the second-time value represents an amount of time taken by the UE to reach at a second location associated with the second NTN neighbor cell,

wherein the first difference value indicates a difference between the first service time value for the first NTN neighbor cell and the first-time value, and

wherein the second difference value indicates a difference between the second service time value for the second NTN neighbor cell and the second-time value.

7 . The method of claim 1 , wherein for determining the trajectory information about the UE, the method comprises:

determining a position vector associated with the UE;

determining a velocity vector associated with the UE; and

determining the trajectory information about the UE based on the determined position vector and the determined velocity vector.

8 . The method of claim 1 , wherein the one or more system parameters further comprise at least one of a service time value, a distance threshold, an NTN configuration, a reference location, an NTN uplink synchronization validity duration timer, or a rate of change of signal condition.

9 . The method of claim 1 , further comprising:

determining, using the one or more system parameters, a service validity of a concerned satellite in the serving NTN cell and each of a position point and a trigger point for initiating at least one of an intra-frequency measurement or an inter-frequency measurement.

10 . The method of claim 1 , wherein the UE selects the NTN cell in at least one mode comprising a radio resource control (RRC) idle mode or an RRC connected mode.

11 . A user equipment (UE) for selecting a non- terrestrial network (NTN) cell, the UE comprising:

a-memory, comprising one or more storage media, storing instructions;

a communicator including an electronic circuit; and

at least one processor, operably connected to the memory and the communicator,

wherein the instructions, when executed by the at least one processor individually or collectively, cause the UE to:

receive one or more system parameters including ephemeris information from a serving NTN cell and a plurality of NTN neighbor cells,

determine trajectory information about the plurality of NTN neighbor cells based on the one or more received system parameters,

determine trajectory information about the UE based on global positioning system (GPS) information of the UE; and

select the NTN cell among the plurality of NTN neighbor cells to perform at least one of a cell reselection or a conditional hand over (CHO), wherein the selected NTN cell is determined based on the determined trajectory information about the plurality of NTN neighbor cells, and the determined trajectory information about the UE.

12 . The UE of claim 11 , wherein the instructions, when executed by the at least one processor individually or collectively, further cause the UE to:

determine a service time duration for each of the plurality of NTN neighbor cells based on the one or more received system parameters,

wherein the NTN cell among the plurality of NTN neighbor cells to perform at least one of the cell reselection or the CHO is selected further based on the determined service time duration for each of the plurality of NTN neighbor cells.

13 . The UE of claim 12 , wherein, in selecting the NTN cell among the plurality of NTN neighbor cells, the instructions, when executed by the at least one processor individually or collectively, further cause the UE to:

rank the service time duration for each of the plurality of NTN neighbor cells in a descending order, wherein a first NTN neighbor cell among the plurality of NTN neighbor cells has a first service time duration that is highest among other service time durations of other NTN neighbor cells of the plurality of NTN neighbor cells,

determine, based on trajectory information about the first NTN neighbor cell and the determined trajectory information about the UE, whether a future interaction occurs between the first NTN neighbor cell and the UE,

store, in response to determining that the future interaction occurs between the first NTN neighbor cell and the UE, information associated with the future interaction which occurs between the first NTN neighbor cell and the UE in a database associated with the UE,

determine, in response to determining that the future interaction occurs between the first NTN neighbor cell and the UE, one or more future interaction parameters associated with the first NTN neighbor cell, and

select the NTN cell among the plurality of NTN neighbor cells based on the one or more determined future interaction parameters.

14 . The UE of claim 13 , wherein the instructions, when executed by the at least one processor individually or collectively, further cause the UE to:

detect a second service time duration associated with a second NTN neighbor cell among the plurality of NTN neighbor cells, wherein the second service time duration is a next highest service time duration among other service time durations of other NTN neighbor cells of the plurality of NTN neighbor cells,

determine, based on trajectory information about the second NTN neighbor cell and the determined trajectory information about the UE, whether a future interaction occurs between the second NTN neighbor cell and the UE,

store, in response to determining that the future interaction occurs between the second NTN neighbor cell and the UE, information associated with the future interaction which occurs between the second NTN neighbor cell and the UE in the database associated with the UE,

determine, in response to determining that the future interaction occurs between the second NTN neighbor cell and the UE, one or more future interaction parameters associated with the first NTN neighbor cell and the second NTN neighbor, and

select the NTN cell among the plurality of NTN neighbor cells based on the one or more determined future interaction parameters.

15 . The UE of claim 14 , wherein the one or more determined future interaction parameters comprise at least one of a first service time value corresponding to the first NTN neighbor cell, a second service time value corresponding to the second NTN neighbor cell, a first-time value, a second-time value, a first difference value, or a second difference value.

16 . The UE of claim 15 ,

wherein the first-time value represents an amount of time taken by the UE to reach at a first location associated with the first NTN neighbor cell,

wherein the second-time value represents an amount of time taken by the UE to reach at a second location associated with the second NTN neighbor cell,

wherein the first difference value indicates a difference between the first service time value for the first NTN neighbor cell and the first-time value, and

wherein the second difference value indicates a difference between the second service time value for the second NTN neighbor cell and the second-time value.

17 . The UE of claim 11 , wherein, in determining the trajectory information about the UE, the instructions, when executed by the at least one processor individually or collectively, further cause the UE to:

determine a position vector associated with the UE;

determine a velocity vector associated with the UE; and

determine the trajectory information about the UE based on the determined position vector and the determined velocity vector.

18 . The UE of claim 11 , wherein the one or more system parameters further comprise at least one of a service time value, a distance threshold, an NTN configuration, a reference location, an NTN uplink synchronization validity duration timer, or a rate of change of signal condition.

19 . The UE of claim 11 , wherein the instructions, when executed by the at least one processor individually or collectively, further cause the UE to:

determine, using the one or more system parameters, a service validity of a concerned satellite in the serving NTN cell and each of a position point and a trigger point for initiating at least one of an intra-frequency measurement or an inter-frequency measurement.

20 . One or more non-transitory computer readable storage media storing one or more computer programs including computer-executable instructions that, when executed by one or more processors of a user equipment (UE) individually or collectively, cause the UE to perform operations, the operations comprising:

receiving one or more system parameters including ephemeris information from a serving NTN cell and a plurality of NTN neighbor cells;

determining trajectory information about the plurality of NTN neighbor cells based on the one or more received system parameters;

determining trajectory information about the UE based on global positioning system (GPS) information of the UE; and

selecting the NTN cell among the plurality of NTN neighbor cells to perform at least one of a cell reselection or a conditional hand over (CHO), wherein the selected NTN cell is determined based on the determined trajectory information about the plurality of NTN neighbor cells, and the determined trajectory information about the UE.

Assignments (1)

Priority Claims (2)

Continuity (2)

References Cited (31)