Handover

1 . A method comprising:

receiving, by a first base station from a second base station, positioning capability information of the second base station;

receiving, by the first base station from a wireless device, a measurement report;

sending, by the first base station to the second base station, a handover request message comprising a request for position information of the wireless device, wherein the sending is based on:

the measurement report; and

the positioning capability information of the second base station.

2 . The method of claim 1 , further comprising receiving, by the first base station from an access and mobility management function (AMF), the request for position information of the wireless device.

3 . The method of claim 1 , wherein the positioning capability information indicates a positioning capability of a cell of the second base station.

4 . The method of claim 1 , wherein the positioning capability information indicates that the second base station supports at least one positioning type.

5 . The method of claim 4 , wherein the at least one positioning type comprises one or more of:

enhanced cell identity (ECID);

observed time difference of arrival (OTDOA);

network-assisted global navigation satellite system (GNSS);

wireless land area network (WLAN) positioning;

bluetooth positioning;

terrestrial beacon system (TBS); and

barometric pressure sensor positioning.

6 . The method of claim 1 , wherein the request for position information of the wireless device indicates a request for at least one positioning type.

7 . The method of claim 6 , wherein the request for position information of the wireless device indicates a priority of the requested at least one positioning type.

8 . The method of claim 1 , wherein the measurement report received from the wireless device indicates a signal strength associated with the second base station.

9 . The method of claim 1 , wherein the measurement report received from the wireless device indicates a plurality of signal strengths associated with a first plurality of base stations, wherein the second base station is one of the first plurality of base stations.

10 . The method of claim 1 , further comprising receiving positioning capability information of a second plurality of base stations, wherein the second base station is one of the second plurality of base stations.

11 . A first base station comprising one or more processors and memory storing instructions that, when executed by the one or more processors, cause the first base station to perform operations comprising:

receiving, from a second base station, positioning capability information of the second base station;

receiving, from a wireless device, a measurement report;

sending, to the second base station, a handover request message comprising a request for position information of the wireless device, wherein the sending is based on:

the measurement report; and

the positioning capability information of the second base station.

12 . The first base station of claim 11 , further comprising receiving, by the first base station from an access and mobility management function (AMF), the request for position information of the wireless device.

13 . The first base station of claim 11 , wherein the positioning capability information indicates that the second base station supports at least one positioning type.

14 . The first base station of claim 13 , wherein the at least one positioning type comprises one or more of:

enhanced cell identity (ECID);

observed time difference of arrival (OTDOA);

network-assisted global navigation satellite system (GNSS);

wireless land area network (WLAN) positioning;

bluetooth positioning;

terrestrial beacon system (TBS); and

barometric pressure sensor positioning.

15 . The first base station of claim 11 , wherein the request for position information of the wireless device indicates a request for at least one positioning type.

16 . The first base station of claim 15 , wherein the request for position information of the wireless device indicates a priority of the requested at least one positioning type.

17 . The first base station of claim 11 , wherein the measurement report received from the wireless device indicates a signal strength associated with the second base station.

18 . The first base station of claim 11 , wherein the measurement report received from the wireless device indicates a plurality of signal strengths associated with a first plurality of base stations, wherein the second base station is one of the first plurality of base stations.

19 . The first base station of claim 11 , further comprising receiving positioning capability information of a second plurality of base stations, wherein the second base station is one of the second plurality of base stations.

20 . A system, comprising:

a first base station comprising: one or more processors and memory storing instructions that, when executed by the one or more processors, cause the first base station to:

receive, from a second base station, positioning capability information of the second base station;

receive, from a wireless device, a measurement report;

send, to the second base station, a handover request message comprising a request for position information of the wireless device, based on:

the measurement report; and

the positioning capability information of the second base station; and

the second base station comprising: one or more processors and memory storing instructions that, when executed by the one or more processors, cause the second base station to:

send, to the first base station, the positioning capability information of the second base station;

receive, from the first base station, the handover request message comprising the request for position information of the wireless device;

determine, based on the handover request message, the position information of the wireless device; and

send, to an access and mobility management function (AMF), the position information of the wireless device.