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Transmission method and system of downlink control information

A technology of control information and transmission method, applied in the field of downlink control information transmission method and transmission system, can solve the problem that the base station cannot configure the DCI format, and achieve the effect of ensuring stability

Active Publication Date: 2015-06-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0034] The main purpose of the present invention is to provide a downlink control information transmission method and system to at least solve the problem in the related art that the base station cannot configure the DCI format in uplink transmission

Method used

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  • Transmission method and system of downlink control information
  • Transmission method and system of downlink control information
  • Transmission method and system of downlink control information

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] In this embodiment, two uplink transmission modes are defined, as follows:

[0087] 1) Uplink transmission mode A:

[0088] If the signaling configured by the base station indicates that the uplink transmission mode can only support a single-antenna transmission mode, then a new uplink transmission mode A is defined, which includes DCI format 0. The uplink transmission mode A is used to indicate a single-antenna port (Single-antenna port) transmission mode represented by DCI format 0 in the public (Common) and user-specific (UE-specific) search spaces. Uplink transmission mode A is shown in Table 3:

[0089] table 3

[0090] UE uplink

transfer mode

DCI format

search space

PDCCH corresponding PDSCH transmission

Program

Mode A

DCI format

0

Common and

C-RNTI defined

UE specific

single antenna port

(Single-antenna port)

[0091] In this scenario, when the UE detects the do...

Embodiment 2

[0127] In this embodiment, the uplink transmission mode is indicated through signaling configured by the base station. There are two modes:

[0128] 1) Uplink transmission mode A:

[0129] If the signaling configured by the base station indicates that the uplink transmission mode can only support a single-antenna transmission mode, then a new uplink transmission mode A is defined, which includes: DCI format 0 and DCI format T. The uplink transmission mode A is used to indicate that in the public (Common) and user-specific (UE-specific) search spaces, DCI format 0 is used to represent the transmission mode of the single-antenna port (Single-antenna port); in the user-specific (UE-specific) In the UE-specific) search space, DCI Format T is used to represent the transmission mode of a single-antenna port, and supports discontinuous resource allocation. Uplink transmission mode A is shown in Table 5:

[0130] table 5

[0131]

[0132] In this scenario, when the UE detects t...

Embodiment 3

[0162] In the LTE-Advance system, the scenario of carrier aggregation needs to be supported. In this scenario, a certain component carrier needs to monitor the PDCCHs of multiple other component carriers. This embodiment proposes a method to determine other component carriers that each component carrier needs to monitor, so as to determine the uplink and downlink transmission modes on each component carrier.

[0163] Specifically, the process for the terminal to obtain downlink control information conforming to the format of the downlink control information in the search space corresponding to the format of the downlink control information includes:

[0164] 1) The base station configures the component carrier to be monitored for the terminal;

[0165] 2) The terminal obtains the downlink control information conforming to the format of the downlink control information in the search space of the component carrier to be monitored.

[0166] The process for the base station to co...

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Abstract

A method and system for transmitting Downlink Control Information (DCI) are disclosed in the present invention, wherein the method for transmitting DCI comprises: a terminal receives the uplink and downlink transmission mode configuration information from a base station, wherein the uplink and downlink transmission mode configured by the uplink and downlink transmission mode configuration information includes DCI format; and the terminal acquires the DCI according with the DCI format in the search space which corresponds to the DCI format. The base station sends the uplink transmission mode to the terminal to indicate different DCI, thereby achieving flexible configuration of DCI format during uplink transmission of the terminal.

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. Background technique [0002] The radio frame (RF, Radio Frame) 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 time slots with a length of 0.5ms. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W72/14H04L1/00H04L1/06
CPCH04W99/00H04W48/16
Inventor 吴欣戴博曾萍左志松
Owner ZTE CORP