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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 mutual interference between the LTE system and the NR system

Active Publication Date: 2022-04-12
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the SCS used by the LTE system is inconsistent with the SCS used by the NR system on the shared spectrum resources, it will cause mutual interference between the LTE system and the NR system

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 approach

[0184] The number of CCEs included in one PDCCH is related to the aggregation level. In a possible implementation manner, the number of CCEs included in one PDCCH is equal to the aggregation level. For an aggregation level greater than 1, the aggregated CCEs include one first CCE and one or more second CCEs, where the number of the one or more second CCEs is equal to the aggregation level minus 1. The default number of the first CCE is one, and the number of one or more second CCEs is related to the aggregation level. If the aggregation level is 2, a second CCE is included, and the second CCE transmits the same control information as the first CCE. If the aggregation level is 4, it includes three second CCEs, and the three second CCEs transmit the same control information as the first CCE. By analogy, the number of second CCEs under other aggregation levels is calculated.

[0185] The first CCE and one or more second CCEs are included in a CORESET, and the CORESET includes ...

example 1

[0258]Example 1, if the LTE CRS is transmitted on the first OFDM symbol in the resource grid shown in FIG. 16(A), then the frequency spectrum of the LTE CRS on the first OFDM symbol can be seen in FIG. 15(A). In FIG. 15(A), bold black arrows represent subcarriers used to carry LTE CRS, dashed lines represent subcarriers not used to carry LTE CRS, and the interval between adjacent subcarriers is 15 kHz. For the LTE CRS on the first OFDM symbol in Figure 16(A), the rate matching resource is RE{(0,1),(0,2),(3,1) in Figure 16(B) ,(3,2),(6,1),(6,2),(9,1),(9,2}). When the control information is repeatedly transmitted on the first OFDM symbol and the second OFDM symbol in the resource grid shown in Figure 16(B), due to the overlap between the rate matching resources and the resources of the first OFDM symbol and the second OFDM symbol , the overlapping part is RE{(0,1),(0,2),(3,1),(3,2),(6,1),(6,2), (9,1),(9,2)}, then no control is carried on subcarrier #0, subcarrier #3, subcarrie...

example 2

[0259] Example 2, if the LTE CRS is transmitted on the fifth OFDM symbol in the resource grid shown in FIG. 16(A), then the frequency spectrum of the LTE CRS on the first OFDM symbol can be seen in FIG. 15(C). In FIG. 15(C), bold black arrows represent subcarriers used to carry LTE CRS, dashed lines represent subcarriers not used to carry LTE CRS, and the interval between adjacent subcarriers is 15 kHz. For the LTE CRS on the fifth OFDM symbol in Figure 16(A), the subcarriers of its rate-matching resource do not coincide with the subcarriers corresponding to the 30kHz resource grid, that is, its rate-matching resource is the same as the subcarrier corresponding to the 30kHz resource grid. The resources of the nine OFDM symbols and the tenth OFDM symbols do not overlap. Therefore, when the control information is repeatedly transmitted on the ninth OFDM symbol and the tenth OFDM symbol in the 30kHz resource grid, all subcarriers of the ninth OFDM symbol and the tenth OFDM symbol...

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Abstract

The embodiment of the present application provides a control information transmission method and device, wherein the method includes: the network device sends the control information on the first CCE, and sends the control information on one or more second CCEs; correspondingly, the terminal device sends the control information on the first CCE. The control information is received on one CCE, and the control information is received on one or more second CCEs. Wherein, the above-mentioned first CCE and the above-mentioned one or more second CCEs are included in a CORESET, and the CORESET includes N CCEs, where N is an integer greater than 1, and the numbering of these N CCEs satisfies the numbering rules of the time domain and then the frequency domain . By adopting the embodiment of the present application, when two communication systems share spectrum resources but use different SCSs, transmission interference between the two communication systems can be reduced.

Description

technical field [0001] The embodiments of the present application relate to the field of communication technologies, and in particular to a control information transmission method and device. Background technique [0002] With the development of communication technology, new radio (new radio, NR) (or the fifth generation mobile communication (5 th -generation, 5G)) system came into being. After the NR system is produced, it will not completely replace the long term evolution (LTE) system immediately, and both coexist for a long time, and both can share the same air interface resources such as time domain resources, frequency domain resources, and air domain resources. For example, in order to improve cell coverage and make full use of unused spectrum resources of carriers in the LTE system, carriers in the NR system and carriers in the LTE system can be deployed on the same frequency domain resources. [0003] The LTE system may support a subcarrier spacing (subcarrier spa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00
CPCH04L5/0053H04L5/0064H04L5/0082H04L5/00
Inventor 刘哲董朋朋彭金磷
Owner HUAWEI TECH CO LTD