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Method and device for sending downlink control information (DCI)

A technology for controlling information and control area, applied in the field of communication, can solve the problem of prolonging the scheduling time

Active Publication Date: 2019-10-22
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for data packets with TTI less than 1ms, there is a defect of long scheduling delay

Method used

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  • Method and device for sending downlink control information (DCI)
  • Method and device for sending downlink control information (DCI)
  • Method and device for sending downlink control information (DCI)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0193] refer to Figure 2A As shown, in the embodiment of the present invention, a process for sending downlink DCI is as follows:

[0194] Step 200: The base station determines the first channel resource, the first channel resource is located in the i-th time unit in a subframe in the time domain, and a subframe includes N T time units, N T is an integer greater than or equal to 2, i is less than or equal to N T a positive integer;

[0195] Step 210: the base station sends DCI to the terminal device on the first channel resource.

[0196] In the embodiment of the present invention, a subframe can also be replaced by 1 ms, therefore, step 200 can also be described as follows:

[0197] The base station determines the first channel resource, the first channel resource is located in the i-th time unit within 1ms in the time domain, and contains N T time units, N T is an integer greater than or equal to 2, i is less than or equal to N T positive integer of .

[0198] In th...

Embodiment 2

[0287] refer to image 3 As shown, in the embodiment of the present invention, another flow for sending downlink DCI is as follows:

[0288] Step 300: The terminal device detects the first channel resource, the first channel resource is located in the i-th time unit in a subframe in the time domain, and a subframe contains N T time units, N T is an integer greater than or equal to 2, i is less than or equal to N T a positive integer;

[0289] Step 310: The terminal device interprets the downlink control information DCI sent by the base station, and the DCI is carried in the first channel resource.

[0290] In the embodiment of the present invention, a subframe can also be replaced by 1 ms, therefore, step 300 can also be described as follows:

[0291] The terminal device detects the first channel resource, and the first channel resource is located in the i-th time unit within 1ms in the time domain, including N T time units, N T is an integer greater than or equal to 2, ...

Embodiment 3

[0387] refer to Figure 4A As shown, in the embodiment of the present invention, a base station is proposed, the base station includes a processing unit 40 and a sending unit 41, wherein:

[0388] The processing unit 40 is configured to determine a first channel resource, the first channel resource is located in the i-th time unit in a subframe in the time domain, and a subframe includes N T time units, N T is an integer greater than or equal to 2, i is less than or equal to N T a positive integer;

[0389] The sending unit 41 is configured to send downlink control information DCI to the terminal device on the first channel resource.

[0390] In the embodiment of the present invention, optionally, N T is at least one of 2, 4, 6, 7, 12, and 14.

[0391] In this embodiment of the present invention, optionally, when N T = 2, the 36 time units contained in a subframe are respectively the first time unit and the second time unit, the first time unit is located in the first sl...

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Abstract

Provided are a method and a device for sending downlink DCI. The method comprises: a base station determining a first channel resource, the first channel resource being located in an ith time unit ina subframe in a time domain, the subframe comprising NT time units, NT being an integer greater than or equal to 2, and i being a positive integer less than or equal to NT; and the base station sending DCI to the terminal device on the first channel resource. In the scheme, the first channel resource bearing the DCI is located in the ith time unit in one subframe in the time domain, wherein i is apositive integer less than or equal to NT, that is, each time unit in the sub-frame has the first channel resource, so that no matter which time unit the data needs to be transmitted, the data can beimmediately transmitted without waiting for the next sub-frame to be transmitted, and thus, the scheduling time delay is reduced.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for sending DCI (Downlink Control Information, downlink control information). Background technique [0002] In the LTE (Long Term Evolution, long-term evolution) system, before receiving downlink data or sending uplink data, terminal equipment needs to know the scheduling information configured by the base station for the terminal equipment, such as time-frequency resource allocation, modulation and coding methods, etc. In addition, the base station also The terminal device needs to be notified of the power control command information related to the uplink transmission. These scheduling information and power control command information belong to DCI. Currently, a base station mainly carries DCI through a PDCCH (Physical Downlink Control Channel, physical downlink control channel). [0003] The current TTI (Transmission Time Interval, transmiss...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04W72/04H04W72/12H04L1/00
CPCH04L1/0072H04L27/2602H04L5/0053H04W72/23H04L5/0007H04W72/0446H04W72/12H04L27/26H04W72/0453
Inventor 李超君马莎吕永霞
Owner HUAWEI TECH CO LTD
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