Method and apparatus for cell selection in wireless communication system
The present disclosure relates to cell selection in wireless communications. According to various embodiments, a method performed by a wireless device in a wireless communication system comprises: receiving, from each of a plurality of mobile cells, location information related to each of the plurality of mobile cells and identifier (ID) information related to each of the plurality of mobile cells; estimating a movement pattern of each of the plurality of mobile cells based on the location information and the identifier information; determining a mobile cell among the plurality of mobile cells for a cell selection based on the movement pattern; and performing the cell selection to the determined mobile cell.
1. A method performed by a wireless device in a wireless communication system, the method comprising:
receiving, from each of a plurality of mobile cells, location information related to each of the plurality of mobile cells and identifier (ID) information related to each of the plurality of mobile cells;
estimating a movement pattern of each of the plurality of mobile cells based on the location information and the identifier information;
determining a mobile cell among the plurality of mobile cells for a cell selection based on the movement pattern; and
performing the cell selection to the determined mobile cell,
wherein the cell selection to the mobile cell is determined based on a cell selection reception (RX) level for the mobile cell and a cell selection quality value for the mobile cell,
wherein the cell selection RX level is determined based on at least one of:
an offset temporarily applied to the mobile cell;
a measured cell RX level value for the mobile cell;
a minimum required RX level in the mobile cell; or
an offset to the minimum required RX level in the mobile cell, and
wherein the cell selection quality value for the mobile cell is determined based on at least one of:
an offset temporarily applied to the mobile cell;
a measured cell quality value for the mobile cell;
a minimum required quality level in the mobile cell; or
an offset to the minimum required quality level in the mobile cell.
2. The method of claim 1 , wherein the estimating the movement pattern comprises:
determining a displacement of each mobile cell within a given time interval based on location information related to each mobile cell;
determining a displacement of the wireless device within the given time interval;
determining a difference in a distance between the wireless device and each mobile cell within the given time interval based on ID information related to each mobile cell; and
determining a similarity of movement pattern to each mobile cell based on the displacement of each mobile cell within the given time interval, the displacement of the wireless device within the given time interval and the difference in the distance between the wireless device and each mobile cell within the given time interval.
3. The method of claim 1 , wherein the determined mobile cell is a mobile cell to which a similarity of movement pattern is largest among the plurality of mobile cells.
4. The method of claim 1 , wherein the location information is received from each mobile cell on a periodic basis.
5. The method of claim 1 , further comprising:
receiving, from each mobile cell, information comprising an ID of each mobile cell and first location information related to the ID;
receiving, from each mobile cell, information comprising the ID and second location information related to the ID after a period of time from when the first location information is received; and
storing the first location information and the second location information to obtain history information related to the ID,
wherein the history information comprises the first location information and the second location information.
6. The method of claim 5 , wherein the first location information indicates location information of a mobile cell related to the ID at a first time, and
wherein the second location information indicates location information of the mobile cell related to the ID at a second time after the period of time from the first time.
7. The method of claim 5 , wherein the movement pattern of each mobile cell is estimated based on the history information.
8. The method of claim 5 , wherein the determined mobile cell is related to a largest amount of history information among the plurality of mobile cells.
9. The method of claim 1 , wherein the determined mobile cell is a suitable cell on which the wireless device is able to camp.
10. The method of claim 1 , further comprising:
determining whether the determined mobile cell satisfies a cell selection criterion,
wherein the performing of the cell selection comprises performing the cell selection to the determined mobile cell based on the fact that the determined mobile cell satisfies the cell selection criterion.
11. The method of claim 1 , further comprising:
determining whether the determined mobile cell satisfies a cell selection criterion;
identifying another mobile cell which satisfies the cell selection criterion based on the fact that the determined mobile cell does not satisfy the cell selection criterion; and
performing the cell selection to the identified another mobile cell.
12. The method of claim 1 , further comprising:
after performing the cell selection to the determined mobile cell, performing a cell reselection to another mobile cell to which a similarity of movement pattern is the largest among a plurality of candidate mobile cells.
13. The method of claim 1 , wherein the wireless device is in communication with at least one of a user equipment, a network, or autonomous vehicles other than the wireless device.
14. A wireless device in a wireless communication system comprising:
a transceiver;
a memory; and
at least one processor operatively coupled to the transceiver and the memory, and configured to:
control the transceiver to receive, from each of a plurality of mobile cells, location information related to each of the plurality of mobile cells and identifier (ID) information related to each of the plurality of mobile cells;
determine a movement pattern of each of the plurality of mobile cells based on the location information and the identifier information;
determine a mobile cell among the plurality of mobile cells for a cell selection based on the movement pattern; and
perform the cell selection to the determined mobile cell,
wherein the cell selection to the mobile cell is determined based on a cell selection reception (RX) level for the mobile cell and a cell selection quality value for the mobile cell;
wherein the cell selection RX level is determined based on at least one of:
an offset temporarily applied to the mobile cell;
a measured cell RX level value for the mobile cell;
a minimum required RX level in the mobile cell; or
an offset to the minimum required RX level in the mobile cell, and
wherein the cell selection quality value for the mobile cell is determined based on at least one of:
an offset temporarily applied to the mobile cell;
a measured cell quality value for the mobile cell;
a minimum required quality level in the mobile cell; or
an offset to the minimum required quality level in the mobile cell.
15. A computer-readable medium having recorded thereon a program for performing each step of a method on a computer, the method comprising:
receiving, from each of a plurality of mobile cells, location information related to each of the plurality of mobile cells and identifier (ID) information related to each of the plurality of mobile cells;
determining a movement pattern of each of the plurality of mobile cells based on the location information and the identifier information;
determining a mobile cell among the plurality of mobile cells for a cell selection based on the movement pattern; and
performing the cell selection to the determined mobile cell,
wherein the cell selection to the mobile cell is determined based on a cell selection reception (RX) level for the mobile cell and a cell selection quality value for the mobile cell,
wherein the cell selection RX level is determined based on at least one of:
an offset temporarily applied to the mobile cell;
a measured cell RX level value for the mobile cell;
a minimum required RX level in the mobile cell; or
an offset to the minimum required RX level in the mobile cell, and
wherein the cell selection quality value for the mobile cell is determined based on at least one of:
an offset temporarily applied to the mobile cell;
a measured cell quality value for the mobile cell;
a minimum required quality level in the mobile cell; or
an offset to the minimum required quality level in the mobile cell.