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Transmission method, device and system for downlink control information

A technology of control information and transmission method, applied in the field of communication, can solve the problem of lack of downlink control information supporting short TTI and related service scheduling in low-latency communication scenarios, and achieve the effect of ensuring the delay communication requirements

Active Publication Date: 2022-04-29
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a downlink control information transmission method, device, and system to at least solve the problem of lack of downlink control information supporting short TTI and related service scheduling in low-latency communication scenarios in the related art

Method used

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  • Transmission method, device and system for downlink control information
  • Transmission method, device and system for downlink control information
  • Transmission method, device and system for downlink control information

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0066] As a preferred implementation manner, the downlink control information (DCI) may be one-level DCI or two-level DCI, wherein when the DCI is two-level DCI, the traffic channel scheduling information indicated may include at least one of the following: The first level and the second level together constitute complete scheduling information; the second level of the two-level DCI contains complete scheduling information.

[0067] For the above two methods, when the first-level DCI and the second-level DCI of the two-level DCI together constitute complete scheduling information, the terminal will skip to the next subframe and continue to detect the slow DCI without demodulating the slow DCI. Detect fast DCI in this subframe. However, when the second level of the two-level DCI contains complete scheduling information, the terminal will continue to detect the fast DCI in this subframe if it cannot demodulate the slow DCI. For example, when the first-level DCI and the second-l...

example 1

[0165] Example 1: TDM mode 1, as shown in Figure 2(a), the sPDCCH area is all the first OFDM symbols, the resources occupied by UE1's sPDCCH are PRB1, 3, and 5, and the other sPDCCH occupies PRB4, 6, and 8 , the resources occupied by the sPDSCH of UE1 are PRB1-8. At this time, it is necessary to indicate that PRB2 and 7 are not used by sPDCCH according to mode 1, and it is necessary to indicate that PRB2, 7 ... are not used by sPDCCH according to mode 2.

example 2

[0166] Example 2: TDM mode 2, as shown in Figure 2(b), at this time there is only one short TTI SS of PRB1-8, UE1's sPDSCH occupies PRB1-10, and UE1's sPDCCH occupies PRB1, 3, and 5. At this time, only According to mode 1 or 2, it indicates that PRB2 and 7 are not used by sPDCCH.

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Abstract

The present invention provides a method, device and system for transmitting downlink control information, wherein the method includes: at least one of Legacy PDCCH, EPDCCH, and SPDCCH is used to carry DCI for scheduling sTTI UEs; the DCI to be carried Send to the terminal; wherein, the traffic channel used by the DCI for scheduling includes at least one of the following: only the traffic channel in sTTI; the traffic channel in sTTI or the traffic channel in 1ms TTI; the traffic channel in sTTI and the traffic channel in 1ms TTI business channel. Through the present invention, the problem of lack of downlink control information supporting short TTI and related business scheduling in the low-latency communication scene in the related art is solved, and an implementation scheme for supporting short TTI scheduling and its related different-length TTI business scheduling is provided , to ensure the delay communication requirements.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method, device and system for transmitting downlink control information. Background technique [0002] With the 4th generation mobile communication technology (4G, the 4th Generation mobile communication technology) long-term evolution (LTE, Long-Term Evolution) / advanced long-term evolution (LTE-Advance / LTE-A, Long-Term Evolution Advance) system commercialization is increasing The requirements for technical indicators of the next-generation mobile communication technology, that is, the fifth generation mobile communication technology (5G, the 5th Generation mobile communication technology) are getting higher and higher. It is generally believed in the industry that the next-generation mobile communication system should have the characteristics of ultra-high speed, ultra-high capacity, ultra-high reliability, and ultra-low delay transmission characteristics. The index of ul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/14
CPCH04W72/23
Inventor 石靖夏树强左志松张雯韩祥辉任敏
Owner ZTE CORP