Beamforming handover messaging in a wireless network
A wireless device may support a plurality of channel state information (CSI) processes. The wireless device may send an indication of a number of supported CSI processes to a first base station. The first base station may send an indication of a number of CSI processes supported by the wireless to a second base station. This information may be used during handover of the wireless device.
1. A method comprising:
transmitting, by a wireless device and to a first base station, a first message comprising one or more parameters indicating that the wireless device supports configuration of a first quantity of channel state information (CSI) processes per carrier;
receiving, by the wireless device and from the first base station, at least one second message comprising first configuration parameters for a second quantity of CSI interference measurement resources for a first carrier, wherein the second quantity is less than or equal to the first quantity; and
receiving, by the wireless device and from the first base station, a handover command to handover to a second base station, wherein the handover command comprises second configuration parameters for a third quantity of CSI interference measurement resources for a second carrier and associated with the second base station, wherein the third quantity is less than or equal to the first quantity,
wherein the second configuration parameters in the handover command are from the second base station and are based on the one or more parameters indicating that the wireless device supports configuration of the first quantity of CSI processes.
2. The method of claim 1 , wherein the one or more parameters are received by the second base station from the first base station.
3. The method of claim 1 , wherein the handover command comprises one of:
an encrypted message; or
a message comprising an integrity header.
4. The method of claim 1 , wherein the second configuration parameters are associated with:
one or more physical channels; and
at least one radio bearer.
5. The method of claim 1 , wherein the handover command comprises at least one of:
a physical layer parameter,
a media access control layer parameter, or
a radio link control layer parameter.
6. The method of claim 1 , wherein the handover command comprises uplink channel configuration parameters and handover parameters.
7. The method of claim 1 , wherein the handover command comprises radio resource configuration parameters comprising one or more physical channel configuration parameters.
8. The method of claim 1 , wherein the handover command comprises third configuration parameters for a plurality of carriers.
9. The method of claim 1 , wherein the handover command further comprises one or more parameters indicating a quantity of channel state information (CSI) processes supported by the wireless device.
10. The method of claim 1 , wherein:
the first configuration parameters further comprise third configuration parameters for a third quantity of CSI reference signals, wherein the third quantity is less than or equal to the first quantity of CSI processes supported by the wireless device; and
the second configuration parameters further comprise fourth configuration parameters for a fourth quantity of CSI reference signals, wherein the fourth quantity is less than the first quantity of CSI processes supported by the wireless device.
11. The method of claim 10 , wherein the first quantity is less than a quantity of CSI processes supported by the wireless device.
12. The method of claim 1 , wherein the first base station comprises a Node B.
13. A method comprising:
transmitting, by a wireless device and to a first base station, a first message comprising first configuration parameters for a first quantity of channel state information (CSI) interference measurement resources per carrier, wherein the first quantity is less than or equal to a number of CSI processes supported by the wireless device;
receiving, by the wireless device and from the first base station, at least one second message comprising second configuration parameters for a second quantity of CSI interference measurement resources for a first carrier, wherein the second quantity is less than or equal to the first quantity; and
receiving, by the wireless device and from the first base station, a handover command to handover to a second base station, wherein the handover command comprises third configuration parameters for a third quantity of CSI interference measurement resources for a second carrier and associated with the second base station, wherein the third quantity is less than or equal to the first quantity,
wherein the third configuration parameters in the handover command are from the second base station and are based on the first configuration parameters.
14. The method of claim 13 , wherein the first configuration parameters are received by the second base station from the first base station.
15. The method of claim 13 , wherein the handover command comprises one of:
an encrypted message; or
a message comprising an integrity header.
16. The method of claim 13 , wherein the third configuration parameters are associated with:
one or more physical channels; and
at least one radio bearer.
17. The method of claim 13 , wherein the handover command comprises at least one of:
a physical layer parameter,
a media access control layer parameter, or
a radio link control layer parameter.
18. The method of claim 13 , wherein the handover command comprises uplink channel configuration parameters and handover parameters.
19. The method of claim 13 , wherein the handover command comprises radio resource configuration parameters comprising one or more physical channel configuration parameters.
20. The method of claim 13 , wherein the handover command comprises fourth configuration parameters for a plurality of carriers.
21. The method of claim 13 , wherein the handover command further comprises one or more parameters indicating the number of CSI processes supported by the wireless device.
22. The method of claim 13 , wherein:
the second configuration parameters further comprise fourth configuration parameters for a fourth quantity of CSI reference signals, wherein the fourth quantity is less than or equal to the first quantity; and
the third configuration parameters further comprise fifth configuration parameters for a fifth quantity of CSI reference signals, wherein the fifth quantity is less than the first quantity.
23. The method of claim 22 , wherein the first quantity is less than a quantity of CSI processes supported by the wireless device.
24. The method of claim 13 , wherein the first base station comprises a Node B.
25. A method comprising:
transmitting, by a wireless device and to a first base station, a first message comprising one or more parameters indicating that the wireless device supports configuration of a first quantity of channel state information (CSI) processes per carrier;
receiving, by the wireless device and from the first base station, at least one second message comprising first configuration parameters for a second quantity of CSI reference signals for a first carrier, wherein the second quantity is less than or equal to the first quantity; and
receiving, by the wireless device and from the first base station, a handover command to handover to a second base station, wherein the handover command comprises second configuration parameters for a third quantity of CSI reference signals for a second carrier and associated with the second base station, wherein the third quantity is less than or equal to the first quantity,
wherein the second configuration parameters in the handover command are from the second base station and are based on the one or more parameters indicating that the wireless device supports configuration of the first quantity of CSI processes.
26. The method of claim 25 , wherein the one or more parameters are received by the second base station from the first base station.
27. The method of claim 25 , wherein the handover command comprises one of:
an encrypted message; or
a message comprising an integrity header.
28. The method of claim 25 , wherein the second configuration parameters are associated with:
one or more physical channels; and
at least one radio bearer.
29. The method of claim 25 , wherein the handover command comprises at least one of:
a physical layer parameter,
a media access control layer parameter, or
a radio link control layer parameter.
30. The method of claim 25 , wherein the handover command comprises uplink channel configuration parameters and handover parameters.
31. The method of claim 25 , wherein the handover command comprises radio resource configuration parameters comprising one or more physical channel configuration parameters.
32. The method of claim 25 , wherein the handover command comprises third configuration parameters for a plurality of carriers.
33. The method of claim 25 , wherein the handover command further comprises one or more parameters indicating a quantity of channel state information (CSI) processes supported by the wireless device.
34. The method of claim 25 , wherein the first base station comprises a Node B.
35. A method comprising:
transmitting, by a wireless device and to a first base station, a first message comprising first configuration parameters for a first quantity of channel state information (CSI) reference signals per carrier, wherein the first quantity is less than or equal to a number of CSI processes supported by the wireless device;
receiving, by the wireless device and from the first base station, at least one second message comprising second configuration parameters for a second quantity of CSI reference signals for a first carrier, wherein the second quantity is less than or equal to the first quantity; and
receiving, by the wireless device and from the first base station, a handover command to handover to a second base station, wherein the handover command comprises third configuration parameters for a third quantity of CSI reference signals for a second carrier and associated with the second base station, wherein the third quantity is less than or equal to the first quantity,
wherein the third configuration parameters in the handover command are from the second base station and are based on the first configuration parameters.
36. The method of claim 35 , wherein the first configuration parameters are received by the second base station from the first base station.
37. The method of claim 35 , wherein the handover command comprises one of:
an encrypted message; or
a message comprising an integrity header.
38. The method of claim 35 , wherein the third configuration parameters are associated with:
one or more physical channels; and
at least one radio bearer.
39. The method of claim 35 , wherein the handover command comprises at least one of:
a physical layer parameter,
a media access control layer parameter, or
a radio link control layer parameter.
40. The method of claim 35 , wherein the handover command comprises uplink channel configuration parameters and handover parameters.
41. The method of claim 35 , wherein the handover command comprises radio resource configuration parameters comprising one or more physical channel configuration parameters.
42. The method of claim 35 , wherein the handover command comprises fourth configuration parameters for a plurality of carriers.
43. The method of claim 35 , wherein the handover command further comprises one or more parameters indicating the number of CSI processes supported by the wireless device.
44. The method of claim 35 , wherein the first base station comprises a Node B.
45. The method of claim 1 , wherein the first carrier comprises a plurality of resource blocks.
46. The method of claim 13 , wherein the first carrier comprises a plurality of resource blocks.
47. The method of claim 25 , wherein the first carrier comprises a plurality of resource blocks.
48. The method of claim 35 , wherein the first carrier comprises a plurality of resource blocks.