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Feedback transmission method of channel state information and user equipment

A technology of channel state information and transmission method, which is applied to the feedback transmission method of channel state information and the field of user terminals, which can solve the problems of unsuitable multi-user MIMO and single-user MIMO switchable transmission modes, etc., and achieve the effect of improving applicability

Active Publication Date: 2010-07-28
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The main purpose of the present invention is to provide a channel state information feedback transmission method and user terminal to solve the problem that the content provided by the existing channel state information is not suitable for the switchable transmission mode between multi-user MIMO and single-user MIMO question

Method used

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  • Feedback transmission method of channel state information and user equipment
  • Feedback transmission method of channel state information and user equipment
  • Feedback transmission method of channel state information and user equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0072] figure 2 It is a detailed flowchart of the channel state information feedback transmission method according to the embodiment of the present invention. The channel state information feedback transmission method according to the embodiment of the present invention mainly includes the following steps (step S201-step S209):

[0073] Step S201, the sending end eNodeB sends a pilot (for example, downlink channel information pilot reference information) to the user terminal UE, for the user terminal UE to test the downlink channel state;

[0074] Step S203, the user terminal UE estimates the downlink channel according to the received pilot information;

[0075] Step S205, the user terminal UE determines the content carried by the channel state information according to the indication information, wherein the indication information includes at least one of the following: rank indicator RI, channel quality indication information CQI, configuration signaling issued by the base s...

example 1

[0082] Please refer to Table 1 below. The values ​​in the table below represent the number of bits. When the value of the bit number is 0, it means no feedback. The value of the bit number that is not 0 is only a reference value. In practical applications, it can also be other values.

[0083] Table 1

[0084]

RI=1

RI=2

RI>2

PMI

6 (vector index)

6 (matrix index)

6 (matrix index)

SU-CQI 1

4

4

4

SU-CQI 2

0

4

4

MU-CQI

4

4

0

[0085] When the rank is 1, the UE feeds back a first-type PMI value, which is a 6-bit vector index. This index can be applied to SU-MIMO system and MU-MIMO system at the same time; at the same time, UE feeds back two 4-bit CQI values, where SU-CQI 1 is used for SU-MIMO system, and MU-CQI is used for MU-MIMO system.

[0086] When the rank is 2, the UE feeds back a PMI value, which is a 6-bit matrix index. This index can be applied to SU-MIMO system ...

example 2

[0089] Please refer to Table 2 below. The values ​​in the table below represent the number of bits. When the value of the bit number is 0, it means no feedback. The value of the bit number that is not 0 is only a reference value. In practical applications, it can also be other values.

[0090] Table 2

[0091]

RI=1

RI=2

RI>2

PMI 1

6 (vector index)

6 (matrix index)

6 (matrix index)

PMI2

0

6 (vector index)

0

SU-CQI 1

4

4

4

SU-CQI 2

0

4

4

MU-CQI

4

0

0

[0092] When the rank is 1, the UE feeds back a PMI value, which is a 6-bit vector index. This index, that is, PMI1, can be applied to SU-MIMO system and MU-MIMO system at the same time; at the same time, UE feeds back two 4-bit CQI values, among which, SU-CQI 1 is used for SU-MIMO system, and MU-CQI is used for MU-MIMO system. MIMO system.

[0093] When the rank is 2, the UE feeds back two PMI val...

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Abstract

The invention discloses a feedback transmission method of channel state information and user equipment (UE). The method comprises the following steps: in a transmission mode, the UE determines the contents carried by the channel state information according to indication information; and the UE sends the channel state information to eNodeB, wherein the indication information comprises at least one of a rank indicator (RI), channel quality indication (CQI) information and configured signaling given by the base station eNodeB. The invention solves the problem that the contents provided by the channel state information are not applicable to the transmission mode which is switchable between the multi-user MIMO and the single-user MIMO and improves the applicability of the channel state information.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a feedback transmission method of channel state information and a user terminal. Background technique [0002] Coordinated Multiple Input Multiple Output (MIMO) technology, also known as Coordinated Multipoint Transmission (COMP) technology, uses the cooperative transmission of transmit antennas of multiple cells to improve the capacity and transmission of wireless links at the cell edge. The reliability can effectively solve the cell edge interference problem. [0003] In wireless communication, if multiple antennas are used at the sending end (eNB), the transmission rate can be improved by adopting spatial multiplexing, that is, different data are transmitted at different antenna positions on the same time-frequency resource at the sending end, Multiple antennas are also used at the receiving end (user terminal UE). Generally speaking, there are two transmission ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00
CPCH04B7/0632H04L5/0091H04W48/08H04B7/0417H04L25/0224H04L5/0035H04B7/0621H04L25/03891H04L5/0023H04B17/24H04B7/0639H04B7/0871H04B7/063
Inventor 戴博陈艺戬徐俊郁光辉徐前子李儒岳张峻峰
Owner ZTE CORP
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