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Sending method and detecting method of downlink control information, base station and user equipment

A technology of user equipment and control information, which is applied in the field of downlink control information transmission, base station and user equipment, can solve the problems of limited coverage performance of low-cost receiving antennas, degradation of coverage performance, high overhead, etc., to make up for the limited reception antenna Effect

Inactive Publication Date: 2013-07-24
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] Low-cost MTC UEs with limited receiving antennas will suffer from reduced coverage performance in the LTE system, and low-cost MTC UEs will not all use the above-mentioned numerous DCI formats and corresponding transmissions because they do not support spatial multiplexing, MIMO and other technologies. model
In addition, considering the enhancement of coverage performance, even if some of the existing DCI formats can be applied to low-cost MTC UEs, it will cause excessive overhead.
[0027] Aiming at the limited coverage performance of MTC UEs with low-cost receiving antennas in the LTE system, and then designing a suitable information transmission process for low-cost MTC UEs, no effective solution has been proposed so far

Method used

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  • Sending method and detecting method of downlink control information, base station and user equipment
  • Sending method and detecting method of downlink control information, base station and user equipment
  • Sending method and detecting method of downlink control information, base station and user equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0426] When the eNB sends system information to the UE, it only uses the PDSCH to carry the information and does not indicate it through the PDCCH.

[0427] The system information is carried in the PDSCH and sent in subframes 0 and 5. QPSK modulation is used. The TBS used is one of k types. It occupies 2 RBs of bandwidth in the full bandwidth, and the transmission mode of transmit diversity is adopted.

[0428] When receiving the public information, the UE performs blind detection in subframes 0 and 5. The UE detects whether the RNTI scrambled by the CRC attached to the message is the information sent to itself. In the search space within the entire bandwidth, the UE performs blind detection in units of 2 RB, and sequentially detects the number {1, 2} in the 6 RBs. , {3, 4}, {5, 6} RBs are detected in the third group, and then k TBSs are detected in RB numbers {5, 6}.

Embodiment 2

[0430] When the eNB sends public information to the UE, it only uses the PDSCH to carry the information and does not indicate it through the PDCCH.

[0431] The public information is carried in the PDSCH, sent in subframes 0 and 5, using QPSK modulation, using one of k types of TBS, occupying 2 RBs of the predefined bandwidth of 4 RBs, and adopting the transmission mode of transmit diversity .

[0432] When receiving the public information, the UE performs blind detection in subframes 0 and 5. The UE detects whether the RNTI scrambled by the CRC attached to the message is information sent to itself, and then performs blind detection in units of 2 RB in the search space within the predefined bandwidth.

[0433] For embodiment 1, the modulation method that can be adopted can also be other such as BPSK, 16QAM etc. besides QPSK; The occupied RB can be 1, 2, 3, 4, 5, 6 RB or more but less than 50RB; Blind detection RB There may be various combinations of time, and a combination o...

Embodiment 3

[0436] When the eNB sends public information to the UE, it uses the PDSCH to carry the information and indicates it through the DCI carried by the PDCCH.

[0437] The public information is carried in the PDSCH and sent in subframes 0 and 5, using QPSK modulation, using one of k types of TBS, occupying the bandwidth of 1 RB in the full bandwidth of 6RB, and adopting the transmission mode of transmit diversity.

[0438] When receiving the public information, the UE performs blind PDCCH detection in subframes 0 and 5. The UE detects whether the RNTI scrambled by the CRC attached to the message is the information sent to itself, and then performs blind detection and detection of DCI Format 1A according to the CCE aggregation level in the public search space within the full bandwidth, and then obtains the DCI in the PDSCH after obtaining the DCI public information.

[0439] At this time, the configuration of the transmission mode is:

[0440]

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Abstract

The invention provides a sending method of downlink control information. The sending method includes the steps of directly transmitting public information to user equipment by a base station through a physical downlink shared channel (PDSCH) through the adoption of a sending diversity transmission mode. The invention further provides a detecting method of the downlink control information. The detecting method includes the steps of detecting the PDSCH which carries the public information through the user equipment in a blind mode, and obtaining the public information. The invention further provides user equipment and a base station. According to the sending method and the detecting method of the downlink control information, the base station and the user equipment, control information expenses are saved.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular, to a kind of downlink control information applicable in LTE / LTE-A (LongTerm Evolution / Long Term Evolution Advance, long-term evolution / advanced long-term evolution) system and its evolution system The transmission method, detection method, base station and user equipment. Background technique [0002] MTC (Machine Type Communication, MTC User Equipment, referred to as MTC UE), also known as M2M (Machine to Machine, Machine to Machine, referred to as M2M) user communication equipment, is the main application form of the Internet of Things at this stage. Low power consumption and low cost are important guarantees for its large-scale application. At present, M2M technology has been supported by internationally renowned manufacturers such as NEC, HP, CA, Intel, IBM, AT&T, and recognized by mobile operators in various countries. M2M devices currently deployed in the marke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/00H04W72/12H04B7/06
CPCH04W72/042H04W88/02H04W88/08H04W72/23
Inventor 石靖戴博夏树强方惠英李新彩
Owner ZTE CORP
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