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Transmission method of downlink control information and system thereof

A technology for controlling information and transmission methods, applied in wireless communication, network traffic/resource management, electrical components, etc., can solve the problem of limited coverage of downlink control channels, and achieve the effect of achieving coverage balance and improving coverage performance.

Active Publication Date: 2012-05-09
JIANGSU TONGKANG SPECIAL ACTIVATED CARBON FIBER &GARMENTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a downlink control information transmission method and system to solve the problem of limited downlink control channel coverage

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Assume that the serving base station of UE1 is B1, currently B1 transmits service data for UE1, UE1 feeds back the wideband channel quality indicator (Channel Quality Indicator, CQI for short) information to B1, and B1 knows the predetermined broadband channel quality indicator threshold (denoted as Thresh CQI ). Specifically, the wideband channel quality indication includes a Signal to Interference and Noise Ratio (SINR for short) indication, a Modulation Coding Scheme (MCS for short) indication, and indications of other parameters that can be converted into SINR.

[0057] In this embodiment, it is considered temporarily that the CQI is equivalent to the SINR indication.

[0058] Specifically, it is assumed that the CQI fed back by UE1 is recorded as CQI UE1 , and base station B1 judges CQI UE1 Less than the threshold Thresh CQI value, using as figure 2 Or the PDCCH transmission method shown in 3. Specifically, such as figure 2 As shown, within the range of the...

Embodiment 2

[0061] Assume that the serving base station of UE1 is B1, currently B1 transmits service data for UE1, UE1 feeds back the wideband channel quality indicator (Channel Quality Indicator, CQI for short) information to B1, and B1 knows the predetermined broadband channel quality indicator threshold (denoted as Thresh CQI ). Specifically, the wideband channel quality indication includes a Signal to Interference and Noise Ratio (SINR for short) indication, a Modulation Coding Scheme (MCS for short) indication, and indications of other parameters that can be converted into SINR.

[0062] In this embodiment, it is considered temporarily that the CQI is equivalent to the SINR indication.

[0063] Specifically, it is assumed that the CQI fed back by UE1 is recorded as CQI UE1 , and base station B1 judges CQI UE1 Not less than the threshold Thresh CQI value, using as Figure 5 The transmission method of the PDCCH is shown. Specifically, such as Figure 5 As shown, within the range ...

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Abstract

The invention relates to a transmission method of downlink control information and a system thereof. The method comprises the following steps that: a network side issues at least two pieces of downlink control information correlated with predetermined service data to user equipment, wherein the downlink control information carries indicating information of TTI of the predetermined service data; and the user equipment receives and parses the downlink control information. According to the transmission method of downlink control information and the system thereof in the invention, probability of successful reception of downlink control information by user equipment is increased; and a covering performance of a downlink control channel can be improved.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a downlink control information transmission method and system of a long-term evolution system (LTE). Background technique [0002] The Universal Mobile Telecommunications System (UMTS) terrestrial wireless access and Long Term Evolution (LTE) of the wireless access network belong to the Fourth Generation (4G) wireless broadband technology. The LTE system can provide high peak data rate (downlink 100Mps, uplink 50Mps), low delay (loopback delay 10ms), improved system capacity and coverage, and reduced operating costs; in addition, it also supports multiple antennas, efficient Packet data transmission, flexible bandwidth operation (up to 20MHz) and seamless integration with existing systems. This necessitates an efficient and reliable control channel design. Specifically, the downlink (Downlink, DL for short) control signaling includes scheduling grant, control forma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06
CPCH04W28/18
Inventor 陈宪明关艳峰左志松袁弋非
Owner JIANGSU TONGKANG SPECIAL ACTIVATED CARBON FIBER &GARMENTS
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