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Transmission method and transmission system of descending control information

A technology of control information and transmission method, applied in the field of transmission method and transmission system of downlink control information, capable of solving problems such as inability to realize downlink control information transmission, lack of downlink transmission mode and format of downlink control information, etc.

Active Publication Date: 2010-06-30
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0072] The technical problem to be solved by the present invention is to provide a transmission method and transmission system for downlink control information, which is used to solve the lack of relevant downlink transmission modes and downlink control information for the current DMRS-based spatial multiplexing mode that supports up to 8 layers Format, unable to realize the problem of downlink control information transmission

Method used

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  • Transmission method and transmission system of descending control information
  • Transmission method and transmission system of descending control information
  • Transmission method and transmission system of descending control information

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0171] In this embodiment, when the cyclic check code in the downlink control channel is scrambled with the cell wireless network temporary identifier, in the UE specific search space defined by Common and C-RNTI, DCIFormat 1A can be used to represent the transmission of transmit diversity mode; in the UEspecific search space defined by C-RNTI, there are the following two configurations:

[0172] Configuration one:

[0173] DCI Format Y can be used to indicate the transmission mode of multi-layer transmission or single-antenna port. The multi-layer transmission here indicates the transmission mode of multi-antenna port, as shown in Table 5:

[0174] UE downlink transmission

[0175] table 5

[0176] Configuration two:

[0177] The DCI Format Y can be used to indicate multi-layer transmission or a single-antenna port or transmission diversity transmission mode, where the multi-layer transmission indicates a multi-antenna port transmission mode. As shown in Table 6:...

Embodiment 2

[0190] In this embodiment, when the cyclic check code in the downlink control channel is scrambled with the cell wireless network temporary identifier, a new DCI Format Y1, Y1 is defined in the UE specific search space defined by Common and C-RNTI The value of is preferably 1A', and the information fields and their corresponding sizes included in DCI Format Y1 are shown in Table 9:

[0191]

[0192] Table 9

[0193] The size K of the newly added signaling can be selected according to different configurations. The newly added K-bit information field here represents at least one or a combination of the following information:

[0194] The layer index (that is, the antenna port index);

[0195] The total number of layers transmitted;

[0196] ●Pilot mode;

[0197] ●Power offset value;

[0198] ●Distinguish between transmission diversity and single-antenna port transmission modes;

[0199] ●Carrier Indicator (Carrier Indicator) information.

[0200] Depending on the speci...

Embodiment 3

[0225] In this embodiment, when the cyclic check code in the downlink control channel is scrambled with the cell wireless network temporary identifier, in the UE specific search space defined by the C-RNTI, DCI FormatY1 is used, and the value of Y1 is preferably 1E. To represent the transmission mode of transmit diversity or single antenna port.

[0226] In addition, in the Common search space, DCI Format 1A is used to represent the transmission mode of transmission diversity. In the UE specific search space defined by C-RNTI, DCI FormatY will also be used to represent various transmission modes, so there are the following two configurations :

[0227] Configuration one:

[0228] In the Common search space, DCI Format 1A is used to represent the transmission mode of transmit diversity. In the UE specific search space defined by C-RNTI, DCI Format Y1 is used to represent the transmission mode of transmit diversity or single antenna port, and DCI Format is used Y represents th...

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Abstract

The invention discloses a method and a system for transmitting descending control information. The system comprises a base station and user equipment. The method comprises the following steps of: firstly, setting a transmission mode X and transmitting the descending control information to the user equipment by the base station according to the transmission mode X; and receiving the descending control information by the user equipment and obtaining the descending control information according to a corresponding descending control information format in the transmission mode X. The transmission mode X comprises one or the combination of a descending control information format 1A, a first descending control information format and a second descending control information format. The transmission mode X also adds and defines six antenna ports A-F. By applying the invention, a space multiplexing technique which has eight layers and is based on a DMRS can be at most supported in the edition R10 of LTE-Advanced; and meanwhile, under the condition of ensuring compatibility, the corresponding descending transmission modes are represented by utilizing the first descending control information format and the second descending control information format, the high-order MIMO transmission is realized, and the performance of the system is enhanced.

Description

technical field [0001] The invention relates to the field of mobile wireless communication, in particular to a method and system for transmitting downlink control information in a wireless communication system. Background technique [0002] The radio frame (RF, RadioFrame) in the Long Term Evolution (LTE, Long Term Evolution) system includes a frequency division duplex (FDD, Frequency Division Duplex) mode and a time division duplex (TDD, Time Division Duplex) mode frame structure, wherein: [0003] The frame structure of FDD mode, such as figure 1 As shown, a wireless frame of 10 milliseconds (ms) consists of twenty slots (slots) with a length of 0.5ms and numbers 0 to 19, and slots 2i and 2i+1 form a subframe (subframe) with a length of 1ms i. [0004] The frame structure of TDD mode, such as figure 2 As shown, a 10ms radio frame consists of two half frames with a length of 5ms. A half frame includes five subframes with a length of 1ms. Subframe i is defined as two tim...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04L1/00
CPCH04W48/12
Inventor 吴欣戴博郁光辉曾萍左志松
Owner ZTE CORP
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