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Control information transmission method and device

A technology for controlling information and transmission methods, which is applied in the field of communication, and can solve problems such as the inability of MTC terminals to receive and detect control channels correctly

Active Publication Date: 2020-04-10
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In the related art, there is no effective solution to the problem that the coverage-enhanced MTC terminal cannot correctly receive and detect the control channel in the case of transmission with different repetition times.

Method used

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  • Control information transmission method and device
  • Control information transmission method and device
  • Control information transmission method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0211] This embodiment describes in detail the transmission of control information using the method provided by the present invention.

[0212] The base station determines the total aggregation resources for repeatedly sending the control information according to the coverage level, the repetition level, and the aggregation level, and sends the control information on the resources. As shown in Table 13, at this time the total aggregate resource (TAR) uses multiple values ​​and only one AL, there are three RL1-3 repetition levels, use one of multiple total aggregate resources, and use AL4 and RL4 in the table to transfer.

[0213] Table 13

[0214] TAR (CCE) AL(CCE) RL(times) 8 4 2 16 4 4 32 4 8

[0215] When adding scrambling codes in control information processing, the repetition level (RL) is used as the initial value c of the scrambling sequence init One of the items makes the scrambling sequences different for different repetition lev...

Embodiment 2

[0220] This embodiment describes in detail the transmission of control information using the method provided by the present invention.

[0221] The base station determines the total aggregation resources for repeatedly sending the control information according to the coverage level, the repetition level, and the aggregation level, and sends the control information on the resources. As shown in Table 14, at this time, the coverage level (CL) is CL1, a single aggregation level is used, and AL8 and RL2 in the table are used for transmission.

[0222] Table 14

[0223] TAR (CCE) AL(CCE) RL(times) 16 8 2 16 4 4 16 2 8

[0224] The terminal blindly detects and receives the control information, and uses a single value of the total aggregation resource, and needs to blindly detect three repetition levels (RL), and the aggregation level corresponds to the repetition level one by one.

[0225] Through this embodiment, the terminal obtains control in...

Embodiment 3

[0227] This embodiment describes in detail the transmission of control information using the method provided by the present invention.

[0228] The base station determines the total aggregation resources for repeatedly sending the control information according to the coverage level, the repetition level, and the aggregation level, and sends the control information on the resources. As shown in Table 15, at this time, the total aggregation resource (TAR) uses multiple values ​​and has multiple RLs, one RL corresponds to one TAR, and corresponds to one AL, and the ALs corresponding to different RLs are not all the same. There are 3 repetition levels RL1-3, using one of multiple aggregated resources, and using AL8 and RL4 in the table for transmission.

[0229] Table 15

[0230] TAR (CCE) AL(CCE) RL(times) 64 4 16 32 8 4 16 8 2

[0231] When adding scrambling codes in the processing of control information, the repetition level (RL) is used as...

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Abstract

Disclosed are a method and apparatus for transmitting control information. The method comprises: a base station determines, according to predefined information, a resource for retransmitting control information, the predefined information comprising at least one of a coverage level, a repetition level / number of repetitions, and an aggregation level; and the base station retransmits the control information on the determined resource. By means of the present invention, the problem that an MTC terminal with enhanced coverage cannot correctly receive and detect a control channel with different numbers of repetitions of transmission is solved, thereby satisfying normal communication demands of the terminal device.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a control information transmission method and device. Background technique [0002] Machine Type Communication (MTC for short) User Equipment (User Equipment or Terminal for short), also known as Machine to Machine (M2M) user communication equipment, is currently the main application form of the Internet of Things . In recent years, more and more mobile operators Suppliers choose LTE / LTE-A as the evolution direction of broadband wireless communication systems. MTC multi-type data services based on LTE / LTE-A will also be more attractive. [0003] The existing LTE / LTE-A system performs transmission based on dynamic scheduling of each subframe, that is, each subframe can transmit a different control channel. [0004] A physical downlink control channel (Physical Downlink Control Channel, PDCCH for short) and an enhanced physical downlink control channel (Enhanced Physical Down...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04L1/18H04L5/00H04W4/70H04W76/10
CPCH04W76/10
Inventor 石靖戴博夏树强刘锟陈宪明方惠英
Owner ZTE CORP
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