Base station selection based on quantity of MIMO layers supported
A method and apparatus for controlling base station selection for service of a user equipment device (UE). When the UE is within coverage of a first base station and within coverage of a second base station, a determination could be made as to whether the UE should be served by the first base station or rather by the second base station, with the determination being based at least on a comparison of (i) maximum number of multiple-input-multiple-output (MIMO) layers that the first base station supports per UE with (ii) maximum number of MIMO layers that the second base station supports per UE. Action could then be taken to cause the UE to be served in accordance with the determination.
1. A method for controlling base station selection for service of a user equipment device (UE), the method comprising:
when the UE is within coverage of a first base station and within coverage of a second base station, making a determination of whether the UE should be served by the first base station or rather by the second base station, wherein the determination is based at least on a comparison of (i) maximum number of multiple-input-multiple-output (MIMO) layers that the first base station supports per UE with (ii) maximum number of MIMO layers that the second base station supports per UE; and
causing the UE to be served in accordance with the determination.
2. The method of claim 1 , wherein making the determination based at least on the comparison comprises:
determining that the second base station supports a higher maximum number of MIMO layers per UE than the first base station; and
based at least on the determining that the second base station supports the higher maximum number of MIMO layers per UE, determining that the UE should be served by the second base station rather than by the first base station.
3. The method of claim 2 , wherein the determining that the UE should be served by the second base station rather than by the first base station occurs when the UE has stronger detected coverage from the first base station than from the second base station.
4. The method of claim 2 , carried out by at least the UE.
5. The method of claim 4 , further comprising:
receiving by the UE from the first base station a first indication of the maximum number of MIMO layers that the first base station supports per UE;
receiving by the UE from the second base station a second indication of the maximum number MIMO layers that the second base station supports per UE; and
performing by the UE the comparison based on the received first indication and received second indication.
6. The method of claim 5 , wherein receiving the first indication comprises receiving the first indication in a broadcast from the first base station, and wherein receiving the second indication comprises receiving the second indication in a broadcast from the second base station.
7. The method of claim 4 , carried out when the UE is seeking initial connectivity, wherein causing the UE to be served in accordance with the determination comprises the UE establishing an initial connection with the second base station rather than with the first base station.
8. The method of claim 4 , carried out when the UE is served by one of the first base station or the second base station, wherein the determination of whether the UE should be served by the first base station or rather by the second base station comprises a determination of whether the UE should hand over between the first base station and the second base station.
9. The method of claim 4 , carried out when the UE is served by a third base station, wherein the determination of whether the UE should be served by the first base station or rather by the second base station comprises a determination of whether the UE should hand over from being served by the third base station to being served by the first base station or rather should hand over from being served by the third base station to being served by the second base station.
10. The method of claim 3 , carried out by at least a base station currently serving the UE.
11. The method of claim 10 , wherein the base station currently serving the UE is one of the first base station or second base station, wherein the making the determination comprises determining whether the UE should hand over between the first base station and the second base station.
12. The method of claim 10 , wherein the base station currently serving the UE is a third base station, wherein making the determination comprises determining whether the UE should hand over from being served by the third base station to being served by the first base station or rather should hand over from being served by the third base station to being served by the second base station.
13. The method of claim 10 , further comprising using, by the base station currently serving the UE, neighbor data to facilitate performing the comparison.
14. A user equipment device (UE) comprising:
a user interface;
a wireless communication interface; and
a controller configured to control selection by the UE of a base station to serve the UE by carrying out operations including:
when the UE is within coverage of a first base station and within coverage of a second base station, making a determination of whether the UE should be served by the first base station or rather by the second base station, wherein the determination is based at least on a comparison of (i) maximum number of multiple-input-multiple-output (MIMO) layers that the first base station supports per UE with (ii) maximum number of MIMO layers that the second base station supports per UE, and
causing the UE to be served in accordance with the determination.
15. The UE of claim 14 , wherein the operations further include
receiving a first indication of the maximum number of MIMO layers that the first base station supports per UE;
receiving a second indication of the maximum number MIMO layers that the second base station supports per UE; and
performing the comparison based on the received first indication and received second indication,
wherein making the determination based at least on the comparison comprises (i) determining that the second base station supports a higher maximum number of MIMO layers per UE than the first base station and (ii) based at least on the determining that the second base station supports the higher maximum number of MIMO layers per UE, determining that the UE should be served by the second base station rather than by the first base station.
16. The UE of claim 14 , wherein the controller is configured to carry out the operations to facilitate initial base station selection by the UE.
17. The UE of claim 14 , wherein the controller is configured to carry out the operations to facilitate a handover decision for the UE.
18. The UE of claim 14 , wherein the controller comprises at least one processing unit, non-transitory data storage, and program instructions stored in the non-transitory data storage and executable by the at least one processing unit to carry out the operations.
19. A base station comprising:
an antenna array comprising a plurality of antennas for communicating over an air interface, wherein the air interface defines resources for carrying data over the air interface; and
a controller configured to control handover of a user equipment device (UE) served by the base station, by carrying out operations including:
when the UE is within coverage of the base station and within coverage of at least one neighboring base station, making a handover determination based on consideration of maximum number of multiple-input-multiple-output (MIMO) layers supported per UE, and
controlling handover of the UE in accordance with the handover determination.
20. The base station of claim 19 , wherein the controller comprises at least one processing unit, non-transitory data storage, and program instructions stored in the non-transitory data storage and executable by the at least one processing unit to carry out the operations.