Beamforming handover messaging in a wireless network

• US 10,236,956 B2
• Filed: 01/26/2018
• Issued: 03/19/2019
• Est. Priority Date: 12/19/2011
• Status: Active Grant

• Current Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Original Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Inventors: Dinan, Esmael Hejazi
• Primary Examiner(s): Hoang, Thai D
• Application Number:
  US15/881,045
• Publication Number:
  US 20180152225A1
• Time in Patent Office: 417 Days
• Field of Search: 370331-334, 455436-444
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/043 using best eigenmode, e.g. beam forming or beam steering
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/046 taking physical layer constraints into account
• CPC Class Codes: H04B 7/0473 taking constraints in layer or codeword to antenna mapping into account
• CPC Class Codes: H04B 7/0478 Special codebook structures directed to feedback optimisation
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/063 Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
• CPC Class Codes: H04B 7/0634 Antenna weights or vector/matrix coefficients
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04J 11/0056 Inter-base station aspects
• CPC Class Codes: H04L 25/03955 in combination with downlink estimations, e.g. downlink path losses
• CPC Class Codes: H04L 27/2646 using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 28/0236 radio quality, e.g. interference, losses or delay
• CPC Class Codes: H04W 36/0055 Transmission or use of information for re-establishing the radio link
• CPC Class Codes: H04W 36/0058 : Transmission of hand-off measurement information, e.g. measurement reports
• CPC Class Codes: H04W 36/0072 : of resource information of target access point
• CPC Class Codes: H04W 36/0094 : Definition of hand-off measurement parameters
• CPC Class Codes: H04W 36/08 : Reselecting an access point
• CPC Class Codes: H04W 36/24 : Reselection being triggered by specific parameters
• CPC Class Codes: H04W 36/30 : by measured or perceived connection quality data
• CPC Class Codes: H04W 72/044 : based on the type of the allocated resource
• CPC Class Codes: H04W 72/0453 : Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/046 : the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 72/20 : Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/27 : between access points
• CPC Class Codes: H04W 72/541 : using the level of interference
• CPC Class Codes: H04W 74/002 : Transmission of channel access control information
• CPC Class Codes: H04W 88/08 : Access point devices

Abstract

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.

Claims

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.

45. The method of claim 1, wherein the first carrier comprises a plurality of resource blocks.

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.

46. The method of claim 13, wherein the first carrier comprises a plurality of resource blocks.

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.

47. The method of claim 25, wherein the first carrier comprises a plurality of resource blocks.

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.

48. The method of claim 35, wherein the first carrier comprises a plurality of resource blocks.