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Downlink control information transmission method and device

A technology for controlling information and transmission methods, applied in the field of communication

Active Publication Date: 2020-02-21
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] No solution has been proposed for the problem of how to indicate the control information of multiple TBs in one PDCCH in the related art

Method used

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  • Downlink control information transmission method and device
  • Downlink control information transmission method and device
  • Downlink control information transmission method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0123] In this example, figure 1 is a flowchart of a method for transmitting downlink control information according to an embodiment of the present invention, such as figure 1 As shown, the process includes the following steps:

[0124] Step S102, when a downlink control information DCI schedules multiple transport block TBs, use the new data indication NDI information and hybrid automatic repeat request HARQ process information in the DCI to indicate the scheduled multiple TBs, wherein the multiple TBs correspond to The NDI information is the same;

[0125] Step S104, transmit the DCI through the PDCCH.

[0126] Through the above steps, in the case that the size of multiple TBs is the same, and the new transmission and retransmission cannot be mixed, the multiple TBs scheduled through the joint indication of the NDI field and the HARQ process field of a DCI are transmitted through the PDCCH The DCI described above can therefore solve the problem of how to indicate the cont...

example

[0269] The number of TB scheduled Process state 4TB process 0,1,2,3 3TB process 0,1,2 process 1,2,3 2TB process 0,1 process 1,2 process 2,3 1TB process 0 process 3

[0270] Process state contains any combination of states in the table.

[0271] The maximum number of processes is 8, and one PDCCH is supported when scheduling 4TB. Need group number 1bit+NDI 1bit+Processstate 3bit total 5bit. For eMTC that supports 8 processes, the NDI can remain unchanged during DCI design, the 3-bit HARQ process field is changed to Process state, and the 1-bit group number field is added.

[0272] 7) The maximum number of processes is 8 or 4X (X>=2 is taken as an integer). When a PDCCH schedules 4 TBs, based on method 1, in order to save overhead, the Process state in 5) is added to reduce the process scheduling limit and follow the dichotomy principle. Traversal principle, there are 3bit Process state schemes as follows:

[0273] 4TB scheduling se...

example 1

[0304] This embodiment is mainly used in a 2TB scheduling scenario when multi-TB scheduling is enhanced, with the purpose of reducing signaling overhead, implementing multi-TB scheduling, improving transmission efficiency, and reducing overhead. The feature is that in multi-TB scheduling, the newly transmitted TB and the retransmitted TB cannot be mixed, and the TBS is consistent.

[0305] According to its characteristics, when 2TB is transmitted, the resource scheduling and scheduling delay in the DCI remain unchanged, but the DCI format needs to support multi-TB scheduling.

[0306] The second method is as follows: NDI indicates new transmission and retransmission, Process state indicates process 0 and process 1, only process 0, only process 1 three states. There are a total of 3 states used by the process, and any 3 of them can be selected from the 4 states expressed by 2bit. or,

[0307] From the perspective of priority, the state is further compressed to achieve multi-T...

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Abstract

The invention provides a downlink control information transmission method and device. The downlink control information transmission method comprises the steps: indicating a plurality of scheduled TBsthrough new data indication NDI information and hybrid automatic repeat request HARQ process information in DCI when one downlink control information DCI schedules the TBs; and transmitting the DCI through a downlink control channel PDCCH. Through the downlink control information transmission method and device, the problem of how to indicate the control information of the plurality of TBs in one PDCCH in related technologies is solved, and the effects of scheduling the plurality of TBs through one DCI and being relatively low in overhead are achieved.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a downlink control information transmission method and device. Background technique [0002] Based on the current Release-15 version of Narrow Band Internet of Things (NB-IoT for short), Machine-Type Communication (MTC for short) and the fifth-generation mobile communication system, its multi-process The mechanism effectively improves the efficiency of data transmission. But at the same time, for a single access user, in order to improve the system throughput, periodic services such as Voice over Internet Protocol (VoIP for short) services in the data domain adopt a semi-static scheduling method and have one-time authorization , the feature of periodic use greatly reduces the overhead of control signaling. However, this method is not suitable for aperiodic services. In the project approval of Rel-16, it was clearly proposed that a physical downlink control channel (PDCCH for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04L1/18H04L1/00H04W72/04
CPCH04L5/0053H04L5/0094H04L1/1812H04L1/0027H04L1/003H04W72/23
Inventor 胡有军戴博方惠英杨维维刘锟
Owner ZTE CORP