CHANNEL INFORMATION FEEDBACK METHOD AND PILOT AND BEAM TRANSMISSION METHOD, SYSTEM AND DEVICE

• US 20170085303A1
• Filed: 08/15/2014
• Published: 03/23/2017
• Est. Priority Date: 03/04/2014
• Status: Abandoned Application

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Chen, Yijian, Lu, Zhaohua, Zhao, Jing, Xiao, Huahua, Yu, Guanghui
• Application Number:
  US15/123,304
• Publication Number:
  US 20170085303A1
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/046 taking physical layer constraints into account
• CPC Class Codes: H04B 7/061 using feedback from receiving side
• CPC Class Codes: H04B 7/0695 using beam selection
• CPC Class Codes: H04B 7/088 using beam selection
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/046 the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Disclosed are a channel information feedback method, pilot and beam transmission methods, systems and devices. The channel information feedback method includes that: a base station transmits M types of pilot signals, the M types of pilot signals corresponding to M pilot ports respectively; the base station configures N pilot ports in the M pilot ports for a terminal through signalling, M being a positive integer and N being a positive integer smaller than M; and the terminal receives and detects the pilot signals from the N pilot ports, selects K pilot ports from the N pilot ports according to received signal quality, and feeds back channel information of channels formed by the K pilot ports and the terminal, K being a positive integer smaller than N.

Claims

1-9. -9. (canceled)

10. A pilot transmission method, comprising:

transmitting, by a base station, M types of pilot signals, the M types of pilot signals corresponding to M pilot ports respectively; and

configuring N pilot ports in the M pilot ports for a terminal through signalling, M being a positive integer and N being a positive integer smaller than M.

11. The pilot transmission method according to claim 10, further comprising:

performing virtualization to form the N pilot ports through the same group of antennas, wherein each pilot port in the N pilot ports corresponds to a set of virtualized precoding weights.

12. The pilot transmission method according to claim 10, further comprising:

determining, by the base station, the N pilot ports according to channel statistic information fed back by the terminal, wherein the channel statistic information is information of a correlation matrix; and

the virtualized precoding weights corresponding to the N pilot ports are characteristic vectors of the correlation matrix.

13. The pilot transmission method according to claim 10, wherein the virtualized precoding weights corresponding to the N pilot ports are:

Discrete Fourier Transform (DFT) vectors v_k, or Kronecker products f(v_k,v_l) of the DFT vectors, wherein

14. The pilot transmission method according to claim 10, further comprising:

configuring, by the base station, the N pilot ports in the M pilot ports for the terminal according to terminal information reported by the terminal.

15. A channel information feedback method, comprising:

receiving and detecting, by a terminal, pilot signals from N pilot ports configured by a base station, selecting K pilot ports from the N pilot ports according to received signal quality, and feeding back channel information of channels formed by the K pilot ports and the terminal, K being a positive integer smaller than N.

16. The channel information feedback method according to claim 15, wherein the channel information comprises at least one of:

index information of the K pilot ports, amplitude proportion information among the K pilot ports, phase difference information among the K pilot ports, received power information of the K pilot ports and signal to interference plus noise ratio information of the K pilot ports.

17. The channel information feedback method according to claim 15, further comprising:

selecting, by the terminal, the K pilot ports from the N pilot ports according to a power threshold configured by the base station, wherein the power threshold is a relative threshold or an absolute threshold.

18. The channel information feedback method according to claim 15, further comprising:

feeding back, by the terminal, selection information of the pilot ports, the selection information of the pilot ports being jointly coded by the number of the selected pilot ports and identifiers of the selected pilot ports, wherein selection probabilities of different pilot ports are different, and different numbers of the pilot ports correspond to different status bits.

19. The channel information feedback method according to claim 15, further comprising:

performing virtualization to form the K pilot ports through the same group of antennas, wherein each pilot port in the K pilot ports corresponds to a set of virtualized precoding weights.

20-31. -31. (canceled)

32. A base station, comprising:

a transmission unit and a configuration unit, wherein

the transmission unit is configured to transmit M types of pilot signals, the M types of pilot signals corresponding to M pilot ports respectively; and

the configuration unit is configured to configure N pilot ports in the M pilot ports for a terminal through signalling, M being a positive integer and N being a positive integer smaller than M.

33. The base station according to claim 32, further comprising:

a virtualization unit, configured to perform virtualization to form the N pilot ports through the same group of antennas, wherein each pilot port in the N pilot ports corresponds to a set of virtualized precoding weights.

34. The base station according to claim 32, wherein the configuration unit is further configured to determine the N pilot ports according to channel statistic information fed back by the terminal, wherein the channel statistic information is information of a correlation matrix;

and the virtualized precoding weights corresponding to the N pilot ports are characteristic vectors of the correlation matrix.

35. The base station according to claim 32, wherein the virtualized precoding weights corresponding to the N pilot ports are:

Discrete Fourier Transform (DFT) vectors v_k, or Kronecker products f(v_k,v_l) of the DFT vectors, wherein

36. The base station according to claim 32, wherein the configuration unit is further configured to configure the N pilot ports in the M pilot ports for the terminal according to terminal information reported by the terminal.

37. A terminal, comprising:

a receiving unit, a selection unit and a feedback unit, wherein

the receiving unit is configured to receive and detect pilot signals from N pilot ports configured by a base station;

the selection unit is configured to select K pilot ports from the N pilot ports according to received signal quality; and

the feedback unit is configured to feed back channel information of channels formed by the K pilot ports and the terminal, K being a positive integer smaller than N.

38. The terminal according to claim 37, wherein the channel information comprises at least one of:

index information of the K pilot ports, amplitude proportion information among the K pilot ports, phase difference information among the K pilot ports, received power information of the K pilot ports and signal to interference plus noise ratio information of the K pilot ports.

39. The terminal according to claim 37, wherein the selection unit is further configured to select the K pilot ports from the N pilot ports according to a power threshold configured by the base station, wherein the power threshold is a relative threshold or an absolute threshold.

40. The terminal according to claim 37, wherein the feedback unit is further configured to feed back selection information of the pilot ports, the selection information of the pilot ports being jointly coded by the number of the selected pilot ports and identifiers of the selected pilot ports, wherein selection probabilities of different pilot ports are different, and different numbers of the pilot ports correspond to different status bits.

41. The terminal according to claim 37, further comprising:

a virtualization unit, configured to perform virtualization to form the K pilot ports through the same group of antennas, wherein each pilot port in the K pilot ports corresponds to a set of virtualized precoding weights.

42-44. -44. (canceled)