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Method and device for transmitting downlink control information

A technology of control information and line control, applied in the directions of transmission path sub-channel allocation, transmission system, digital transmission system, etc., can solve the problem of high complexity, achieve the effect of improving system performance, guaranteeing performance, and reducing the complexity of blind detection

Pending Publication Date: 2020-02-25
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Different formats of DCI may have different lengths. For multiple DCIs of different lengths, during the process of DCI transmission between the network-side device and the terminal device, the terminal-side device needs to perform blind detection on DCIs of different lengths, which is more complicated.

Method used

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  • Method and device for transmitting downlink control information
  • Method and device for transmitting downlink control information
  • Method and device for transmitting downlink control information

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0179] In this embodiment, the network device intercepts from the highest bit of the FDRA domain, which may have image 3 and Figure 4 Two outcomes.

[0180] Such as image 3 As shown, if only 1 bit needs to be intercepted, there will be 1 bit left in the frequency hopping offset indication bit after the interception operation is completed, then when the terminal device sends uplink data, it can follow the size indicated by the frequency hopping offset indicated by 1 bit. frequency hopping. In this case, originally, the network device configures 4 frequency hopping offsets for the terminal through high-level signaling, and the frequency hopping offset indication bit is 2 bits. When one bit is truncated, the network device can only indicate 2 frequency hopping offsets among the 4 frequency hopping offsets through the truncated DCI.

[0181] In a possible implementation manner, the above 2 bits may indicate 00, 01, 10, and 11, respectively corresponding to the above four fr...

Embodiment 2

[0184] In this embodiment, the network device always reserves the frequency hopping offset indication bit, and only truncates the most significant bit from the actual frequency domain resource allocation indication bit until it is aligned with the length of DCI format 1_0.

[0185] Such as Figure 5 As shown, no matter how many bits need to be truncated, the network device always truncates from the highest bit of the actual frequency domain resource allocation indicator bit, so that the terminal device can always follow the 4 bits indicated by the frequency modulation offset indicator bit when sending uplink data. FM offset to perform FM operation.

Embodiment 3

[0187] In this embodiment, the network device intercepts the 1-bit frequency hopping offset indicator bit and reserves the 1-bit frequency hopping offset indicator bit. If it is necessary to continue to truncate, then start truncating from the highest bit of the actual frequency domain resource allocation indicator bit .

[0188] Such as Figure 6 As shown, the network device performs an interception operation on both the frequency hopping offset indicator bit and the actual frequency domain resource allocation indicator bit, and the frequency modulation offset indicator bit changes from 2 bits to 1 bit, then when the terminal device sends uplink data, it can Frequency hopping is performed according to the magnitude indicated by the frequency hopping offset indicated by 1 bit. Similar to Embodiment 1, the network device needs to select 2 frequency hopping offsets among the 4 frequency hopping offsets configured for the terminal.

[0189]It should be understood that the trunc...

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Abstract

The invention provides a method and a device for transmitting downlink control information. The method comprises the following steps: network side equipment sends first configuration information to terminal side equipment, wherein the first configuration information is used for configuring a search space, the terminal side equipment receives the first configuration information sent by the networkside equipment and detects first DCI and second DCI in the search space according to the first configuration information, and the first DCI comprises a first field and a truncated second field; or thetruncated first field and the truncated second field; or the truncated first field and the truncated second field; wherein the first field indicates resource allocation, the second field indicates frequency hopping offset, and the bit number of the first DCI is the same as the bit number of the second DCI. According to the method and the device for transmitting the downlink control information inthe embodiment of the invention, the blind detection complexity of the DCI by the terminal side equipment can be reduced.

Description

technical field [0001] The present application relates to the communication field, in particular to a method and device for transmitting downlink control information in the communication field. Background technique [0002] In the fifth-generation mobile communication system, resource allocation in the frequency domain is divided into resource allocation type 0 and resource allocation type 1. Among them, resource allocation type 0 does not support frequency hopping, and resource allocation type 1 is further divided into support for frequency hopping and non-frequency hopping. Two cases of frequency hopping are supported. Therefore, the network side device may indicate to the terminal device whether to support frequency hopping through a frequency hopping flag (frequency hopping flag) in downlink control information (downlink control information, DCI). Specifically, if the frequency hopping flag bit indicates that frequency hopping is supported, the DCI frequency domain reso...

Claims

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Application Information

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IPC IPC(8): H04W72/04H04W72/12H04L5/00
CPCH04W72/0453H04L5/0053H04W72/23
Inventor 高飞焦淑蓉李俊超花梦
Owner HUAWEI TECH CO LTD
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