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Method and system for indicating and determining uplink transmission mode

A transmission mode and indication technology, applied in the field of advanced long-term evolution systems, can solve the problem that the base station cannot indicate the uplink transmission mode, etc., and achieve the effect of convenient uplink scheduling

Active Publication Date: 2011-01-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to provide a method for indicating the uplink transmission mode in the LTE-Advanced system, so as to solve the problem that the base station cannot indicate the uplink transmission mode to the UE

Method used

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  • Method and system for indicating and determining uplink transmission mode
  • Method and system for indicating and determining uplink transmission mode
  • Method and system for indicating and determining uplink transmission mode

Examples

Experimental program
Comparison scheme
Effect test

application example 1

[0108] When the number of UE antennas is 2, in the DCI format of this example, the bit field of the downlink control signaling used to indicate the uplink precoding information includes 2 bits, and different values ​​of the bit field represent different information, as follows :

[0109] One of the values, such as 00, indicates a precoding matrix corresponding to 2-layer transmission (it can also be said to be a corresponding precoding matrix index, the two are equivalent), and 2 transmission blocks are enabled;

[0110] One of the values, such as 01, means that the first transmission block is enabled and the second transmission block is not enabled;

[0111] One of the values, such as 10, means that the second transmission block is enabled and the first transmission block is not enabled;

[0112] One of the values, such as 11, indicates that the precoding information only includes rank indication information or layer information, and the rank or the number of layers is 2.

...

application example 2

[0130] When the number of UE antennas is 2, in the DCI format of this example, the bit field of the downlink control signaling used to indicate the uplink precoding information includes 3 bits, and different values ​​of the bit field represent different information. as follows:

[0131] One of the values, such as 000, indicates a precoding matrix corresponding to 2-layer transmission;

[0132] Among them, 6 values, such as 001~110, respectively represent 6 kinds of precoding matrices corresponding to 1-layer transmission;

[0133] One of the values ​​indicates that the precoding information only includes rank indication information or layer information, for example, 111 indicates that the rank or the number of layers is 2, or indicates that the rank or the number of layers is 1.

[0134] The above corresponding relationship is expressed in a table as follows:

[0135] Table 2

[0136] precoding information bit field

information expressed

000

1 type ...

application example 3

[0144] When the number of UE antennas is 4, in the DCI format of this example, the bit field of the downlink control signaling used to indicate the uplink precoding information includes 5 bits, and different values ​​of the bit field represent different information. as follows:

[0145] Among them, 16 values, such as 00000~01111, respectively represent 16 kinds of precoding matrices corresponding to 2-layer transmission;

[0146] The 12 values, such as 10000 to 11011, respectively represent 12 kinds of precoding matrices corresponding to the 3-layer transmission;

[0147] One of the values, such as 11100, represents a precoding matrix corresponding to 4-layer transmission;

[0148] The three values ​​among them only represent rank indication information or layer information, such as 11101, 11110, and 11111, which represent ranks or layers of 2, 3, and 4, respectively.

[0149] The above corresponding relationship is expressed in a table as follows:

[0150] Table 4

[0151...

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Abstract

The invention discloses a method and a system for indicating and determining an uplink transmission mode, which is used for an advanced long-term evolution (LTE-A) system. The indication method comprises the following steps: a base station uses a downlink control signaling indicating the uplink precoding information to indicate the uplink transmission mode at the same time, wherein, the precoding information indicated by the partial value of a bit field of the downlink control signaling only comprises order indication information or layer information; the base station uses the partial value to indicate the user equipment to adopt the uplink transmission mode multiplexed by the open-loop space; and the base station transmits the downlink control signaling to the user equipment. The indication method of the invention can solve the problem that the base station can not indicate the uplink transmission mode to the user equipment. The invention also provides a determination method of the uplink transmission mode based on the indication method of the uplink transmission mode and a corresponding system; and the user equipment determines the uplink transmission mode needing to be adopted according to the downlink control signaling, and can carry out corresponding precoding processing.

Description

technical field [0001] The present invention relates to an Advanced Long Term Evolution (LTE-A for short) system, in particular to an uplink transmission mode indication method and determination method in the system and a system thereof. Background technique [0002] In the 3rd Generation Partnership Project (The 3rd Generation Partnership Project, 3GPP for short) Long Term Evolution (LTE for short) system, the base station controls the User Equipment (UE for short) in a centralized scheduling manner. Transmission of a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH for short). [0003] The base station sends uplink scheduling information (uplink scheduling information) of the PUSCH to the target UE through a physical downlink control channel (Physical Downlink Control Channel, PDCCH for short). The physical downlink control channel carries downlink control information (DCI for short), including downlink / uplink scheduling information (downlink or uplin...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04L1/00H04W72/12
CPCH04L5/001H04L5/0092H04L5/0023H04L5/0028
Inventor 戴博吴欣梁春丽张禹强
Owner ZTE CORP
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