Transmission method and system of downlink control information

A technology for controlling information and transmission methods, applied in transmission systems, radio transmission systems, diversity/multi-antenna systems, etc., can solve problems such as practical application inconvenience, and achieve the effect of good compatibility

Inactive Publication Date: 2010-02-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing technical solutions, it is not determined which transmission mode DCI Format 1A will represent and how to indicate these transmission modes, which brings inconvenience to practical applications

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

[0102] Embodiment 1, indicating that Format 1A only corresponds to the transmission mode of transmit diversity

[0103] In this embodiment, in the UE specific search space defined by Common and C-RNTI, when the cyclic check code in the downlink control channel is scrambled with the wireless network temporary identifier of the semi-persistently scheduled cell, for example, the UE is set to use When the CRC scrambled by the SPS C-RNTI is used to decode the PDCCH, the DCI Format 1A can be used to indicate the transmission mode of the transmit diversity. As shown in Table 4:

[0104] UE downlink transmission mode

[0105] Table 4

Embodiment 2

[0106] Embodiment 2: Indicates that Format 1A only corresponds to a single antenna port transmission mode, and the antenna port is fixed

[0107] In this embodiment, in the UE specific search space defined by Common and C-RNTI, when the cyclic check code in the downlink control channel is scrambled with the wireless network temporary identifier of the semi-persistently scheduled cell, for example, the UE is set to use When the CRC scrambled by the SPS C-RNTI is used to decode the PDCCH, DCI Format 1A can be used to indicate the transmission mode of single-layer transmission. The single-layer transmission here refers to the transmission mode of a single antenna port, and the corresponding antenna port has the following configurations:

[0108] Configuration 1: The single-antenna port corresponding to DCI Format 1A is fixed as port 5, and its configuration in mode X is shown in Table 5:

[0109] UE downlink transmission mode

[0110] table 5

[0111] Configuration 2:...

Embodiment 3

[0117] Embodiment 3: Indicates that Format 1A only corresponds to a single-antenna port transmission mode, and the antenna port signaling indicates

[0118]In this embodiment, in the UE specific search space defined by Common and C-RNTI, when the cyclic check code in the downlink control channel is scrambled with the wireless network temporary identifier of the semi-persistently scheduled cell, for example, the UE is set to use When the CRC scrambled by the SPS C-RNTI is used to decode the PDCCH, DCI Format 1A can be used to indicate the transmission mode of single-layer transmission. The single-layer transmission here refers to a single-antenna port transmission mode, and the corresponding antenna port is port M or port N.

[0119] When the UE is set by the high layer to use the CRC scrambled by SPS C-RNTI to decode the PDCCH, and the semi-persistent scheduling is activated, the HARQ Process Number (ID) signaling bit, NDI signaling bit, and RV in DCI Format 1A The signaling ...

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Abstract

The invention discloses transmission method and system of downlink control information. Aiming at a new transmission mode X corresponding to a double-flow beam forming technology in R9, when a cycliccheck code in a downlink control channel schedules cell wireless network temporary identification scramble by a semi-static way, a downlink control information format 1A for presenting a single-layertransmission mode or a transmission mode with both single-layer transmission and transmission diversity is defined; a base station generates the downlink control information according to the downlinkcontrol information format 1A; user equipment receives the downlink control information and acquires the downlink control information according to the downlink control information format 1A, thereby accurately indicating the adopted transmission mode and an antenna port during single-layer transmission. The invention not only ensures the flexibility of system scheduling, but also adds no any system complexity and signaling cost, and has good compatibility with LTE R8.

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] A radio frame (radio frame) in a Long Term Evolution (LTE, Long Term Evolution) system includes frame structures in a Frequency Division Duplex (FDD, Frequency Division Duplex) mode and a Time Division Duplex (TDD, Time Division Duplex) mode. 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. 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 Applications(China)
IPC IPC(8): H04W80/04H04B7/26
CPCH04W48/08H04W48/16H04W72/042H04L1/0072H04W28/04H04B7/06H04B7/0613
Inventor 戴博吴欣郁光辉李卫军
Owner ZTE CORP
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