Beamforming handover messaging in a wireless network
A first base station transmits a message to a second base station after a handover decision for a wireless device supporting beamforming and multiple carrier configurations. The message includes a plurality of measurement configuration parameters for the wireless device. The first base station receives a response from the second base stations. The first base station transmits a handover command to the wireless device subsequent to receiving the response message.
1. A method comprising:
transmitting, by a first base station to a second base station and in response to a handover decision for a wireless device, at least one first message comprising at least one of:
one or more parameters indicating that the wireless device supports configuration of a first quantity of channel state information (CSI) processes for a carrier, the first quantity being greater than one; or
first configuration parameters of a second quantity of CSI reference signals and of a third quantity of CSI interference measurement resources, wherein the second quantity and the third quantity are each less than or equal to the first quantity;
receiving, from the second base station, at least one second message comprising:
second configuration parameters of a fourth quantity of CSI reference signals and of a fifth quantity of CSI interference measurement resources, wherein the fourth quantity and the fifth quantity are each less than or equal to the first quantity; and
transmitting, to the wireless device, a third message comprising the second configuration parameters.
2. The method of claim 1 , wherein the third message comprises an encrypted message and an integrity header.
3. The method of claim 1 , wherein the third message comprises configuration parameters of:
one or more physical channels; and
at least one radio bearer.
4. The method of claim 1 , wherein the third message comprises at least one of: a physical layer parameter, a media access control layer parameter, or a radio link control layer parameter.
5. The method of claim 1 , wherein the third message comprises uplink channel configuration parameters and handover parameters.
6. The method of claim 1 , wherein the third message comprises at least one radio resource configuration parameter comprising at least one physical channel configuration parameter.
7. The method of claim 1 , wherein the third message comprises third configuration parameters of a plurality of carriers.
8. 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:
transmit, to a second base station and in response to a handover decision for a wireless device, at least one first message comprising:
one or more parameters indicating that the wireless device supports configuration of a first quantity of channel state information (CSI) processes for a carrier, the first quantity being greater than one; and
first configuration parameters of a second quantity of CSI reference signals and of a third quantity of CSI interference measurement resources, wherein the second quantity and the third quantity are each less than or equal to the first quantity;
receive, from the second base station, at least one second message comprising:
second configuration parameters of a fourth quantity of CSI reference signals and of a fifth quantity of CSI interference measurement resources, wherein the fourth quantity and the fifth quantity are each less than or equal to the first quantity; and
transmit, to the wireless device, a third message comprising the second configuration parameters.
9. The first base station of claim 8 , wherein the third message further comprises configuration parameters of:
one or more physical channels; and
at least one radio bearer.
10. The first base station of claim 8 , wherein the third message comprises at least one of: a physical layer parameter, a media access control layer parameter, or a radio link control layer parameter.
11. The first base station of claim 8 , wherein the third message comprises uplink channel configuration parameters and handover parameters.
12. The first base station of claim 8 , wherein the third message comprises radio resource configuration parameters comprising one or more physical channel configuration parameters.
13. 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:
transmit, to a second base station and in response to a handover decision for a wireless device, at least one first message comprising at least one of:
one or more parameters indicating that the wireless device supports configuration of a first quantity of channel state information (CSI) processes for a carrier, the first quantity being greater than one; or
first configuration parameters of a second quantity of CSI reference signals and of a third quantity of CSI interference measurement resources, wherein the second quantity and the third quantity are each less than or equal to the first quantity;
receive, from the second base station, at least one second message comprising:
second configuration parameters of a fourth quantity of CSI reference signals and of a fifth quantity of CSI interference measurement resources, wherein the fourth quantity and the fifth quantity are each less than or equal to the first quantity; and
transmit, to the wireless device, a third message comprising the second configuration parameters.
14. The first base station of claim 13 , wherein the third message comprises at least one radio resource configuration parameter comprising at least one physical channel configuration parameter.
15. The first base station of claim 13 , wherein the third message comprises configuration parameters of:
one or more physical channels; and
at least one radio bearer.
16. The first base station of claim 13 , wherein the third message comprises at least one of: a physical layer parameter, a media access control layer parameter, or a radio link control layer parameter.
17. The first base station of claim 13 , wherein the third message comprises uplink channel configuration parameters and handover parameters.
18. The first base station of claim 13 , wherein the third message comprises an encrypted message and wherein the encrypted message comprises an integrity header.
19. The first base station of claim 8 , wherein the third message comprises an encrypted message and wherein the encrypted message comprises an integrity header.
20. The first base station of claim 8 , wherein the third message comprises third configuration parameters of a plurality of carriers.
21. A method comprising:
transmitting, by a first base station to a second base station and in response to a handover decision for a wireless device, at least one first message comprising:
one or more parameters indicating that the wireless device supports configuration of a first quantity of channel state information (CSI) processes for a carrier, the first quantity being greater than one; and
first configuration parameters of a second quantity of CSI reference signals and of a third quantity of CSI interference measurement resources, wherein the second quantity and the third quantity are each less than or equal to the first quantity;
receiving, from the second base station, at least one second message comprising:
second configuration parameters of a fourth quantity of CSI reference signals and of a fifth quantity of CSI interference measurement resources, wherein the fourth quantity and the fifth quantity are each less than or equal to the first quantity; and
transmitting, to the wireless device, a third message comprising the second configuration parameters.
22. The method of claim 21 , wherein the third message further comprises configuration parameters of:
one or more physical channels; and
at least one radio bearer.
23. The method of claim 21 , wherein the third message comprises at least one of: a physical layer parameter, a media access control layer parameter, or a radio link control layer parameter.
24. The method of claim 21 , wherein the third message comprises uplink channel configuration parameters and handover parameters.
25. The method of claim 21 , wherein the third message comprises radio resource configuration parameters comprising one or more physical channel configuration parameters.
26. The method of claim 21 , wherein the third message comprises an encrypted message and wherein the encrypted message comprises an integrity header.
27. The method of claim 21 , wherein the third message comprises third configuration parameters of a plurality of carriers.