PDCCH (Physical Downlink Control Channel) false detection judgment method suitable for 5G system
A judgment and 5G technology, which is applied in the direction of devices dedicated to receivers, transmission systems, digital transmission systems, etc., can solve problems that cannot be fully applied to 5G systems, improve channel transmission reliability, improve system performance, and reduce false detections rate effect
Inactive Publication Date: 2021-06-29
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology
[0007] However, there are many problems in this false detection and judgment method. Sometimes even if the judgment rule is passed, it is not necessarily the correct DCI information, and the format of DCI in the 5G system has changed, from 13 DCI formats in the LTE system to DCI0_0 / 0_1, DCI 1_0 / 1_1, DCI 2_0 / 2_1 / 2_2 / 2_3 total 8 DCI formats
The specific rules of the judgment strategy are no longer fully applicable to the 5G system
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[0041]Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.
[0042] see Figure 1 ~ Figure 3 , In the 5G system, the CRC check is adopted after the PDCCH is decoded. Due to the influence of the CRC characteristics and t...
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The invention relates to a PDCCH (Physical Downlink Control Channel) false detection judgment method suitable for a 5G system, and belongs to the field of wireless communication. The method comprises the following steps: carrying out PDCCH blind detection, and caching data before Polar decoding and DCI decoding information; performing CRC (Cyclic Redundancy Check), and if the CRC does not pass, determining that the DCI performing false detection judgment if the CRC passes: performing judgment of a corresponding rule according to DCI format information corresponding to the DCI decoding information, determining that the DCI is wrong if the DCI format information does not accord with the DCI format information, and performing false detection judgment if the DCI format information accords with the DCI decoding information; and recoding the data after Polar decoding, carrying out SNR coherent estimation on the data after Polar decoding and the data before Polar decoding to obtain an SNR coherent estimation value, if the SNR coherent estimation value is greater than a preset threshold value, considering that the DCI is correct, otherwise, considering that the DCI is wrong and the PDCCH is falsely detected. According to the invention, whether the PDCCH is falsely detected or not can be effectively judged, so that the false detection rate is reduced, the channel transmission reliability is improved. The system performance is improved.
Description
technical field [0001] The invention belongs to the field of wireless communication, relates to the field of 5G NR mobile communication, and specifically relates to a physical downlink control channel (PDCCH) error detection and judgment method in a 5G system. Background technique [0002] Three major application scenarios of 5G: enhanced Mobile Broadband (eMBB), ultra Reliable and Low Latency Communication (uRLLC), and massive Machine Type Communication (mMTC). 5G proposes eight key performance indicators, and the realization of these key performance indicators needs to be realized through the design of the physical layer. [0003] The main implementation of the 5G physical layer includes downlink physical channels: Physical Broadcast Channel (Physical Broadcast Channel, PBCH), Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH), Physical Downlink Share Channel (Physical Downlink Share Channel, PDSCH); uplink physical channels: Physical Uplink Shar...
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Login to View More IPC IPC(8): H04L1/00H04W28/04
CPCH04L1/0038H04L1/0023H04L1/0061H04W28/04
Inventor 席兵汪晓雅邓炳光秦启航吴婷
Owner CHONGQING UNIV OF POSTS & TELECOMM