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
View PDF2 Cites 83 Cited by
  • 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 t

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Example Embodiment

[0170] Example one:

[0171] In this embodiment, when the cyclic check code in the downlink control channel is scrambled by the temporary identification of the cell radio network, in the UE specific search space defined by Common and C-RNTI, DCIFormat 1A can be used to indicate the transmission of transmission diversity Method: In the UE-specific search space defined by C-RNTI, there are two configurations as follows:

[0172] Configuration one:

[0173] DCI Format Y can be used to indicate the transmission mode of multi-layer transmission or single antenna port, where multi-layer transmission means the transmission mode of multiple antenna ports, as shown in Table 5:

[0174] UE downlink transmission

[0175] table 5

[0176] Configuration two:

[0177] DCI Format Y can be used to represent the transmission mode of multi-layer transmission or single antenna port or transmission diversity, where multi-layer transmission represents the transmission mode of multiple antenna ports. As ...

Example Embodiment

[0189] Embodiment two:

[0190] In this embodiment, when the cyclic check code in the downlink control channel is scrambled by the temporary identification of the cell radio network, 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 included in DCI Format Y1 and their corresponding sizes 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 information field with a size of K bits here represents at least one or a combination of the following information:

[0194] ●Layer index (that is, 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 mode;

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

[0200] There...

Example Embodiment

[0224] Embodiment three:

[0225] In this embodiment, when the cyclic check code in the downlink control channel is scrambled by the temporary identification of the cell radio network, in the UE specific search space defined by C-RNTI, DCI Format Y1 is used, and the value of Y1 is preferably 1E. To represent the transmission mode of transmission 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, and in the UE specific search space defined by C-RNTI, DCI FormatY is also used to represent various transmission modes, so there are two configurations as follows :

[0227] Configuration one:

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04B7/26H04L1/00
CPCH04W48/12
Inventor 吴欣戴博郁光辉曾萍左志松
Owner ZTE CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap