PDSCH (Physical Downlink Shared Channel) carrier aggregation system and method of power wireless private network

Abstract

The invention relates to a PDSCH (Physical Downlink Shared Channel) carrier aggregation system and method of a power wireless private network, and belongs to the technical field of wireless communication. The PDSCH carrier aggregation system comprises a 5GNR PDSCH carrier resource group generating module, a 230MHz PDSCH resource mapping module, an interference filtering module, a 230MHz PDSCH resource demapping module and a 5GNR PDSCH carrier resource group solving module. Wherein the module for generating the 5GNR PDSCH carrier wave resource group performs channel coding on a PDSCH data block to form a carrier wave resource group; and the 230MHz PDSCH resource mapping module maps the carrier resource group to a power wireless private network resource grid so as to adapt to the discretely distributed subcarrier resources of the power wireless private network. According to the invention, the requirement of simultaneous transmission of different 5GNR PDSCH resource blocks in the power wireless private network can be met, and the spectrum utilization efficiency and the system anti-interference capability are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless communication, especially the wireless private network technology in the communication network of the power system, and relates to a PDSCH carrier aggregation system and method for a power wireless private network. Background Art

[0002] The discrete shared frequency band (223 MHz - 235 MHz) is an important frequency band for the communication private networks of specific industries in China and is widely used in key fields such as power, gas, and civil air defense, mainly for deploying LTE 230 and IoT 230 communication systems. With the advantages of strong penetration and wide coverage, this frequency band can meet the demand for low-frequency band resources in private network communication. However, compared with traditional mobile communication frequency bands, this frequency band faces many unique challenges in technical deployment. Especially when adopting the Physical Downlink Shared Channel (PDSCH) resource block carrier aggregation technology, the following technical difficulties are particularly prominent:

[0003] First: The bandwidth limitation and spectral distribution discreteness of the 230 MHz frequency band significantly limit the communication capacity. The total bandwidth of the entire frequency band is only about 10 MHz, the bandwidth of a single sub-band is only 25 kHz, and the intervals between sub-bands are relatively far, with highly dispersed resources. This spectral distribution characteristic poses various technical challenges to the communication system. On the one hand, the limited bandwidth is difficult to support high-capacity data transmission; on the other hand, the dispersed spectral resources increase the complexity of multi-carrier signal design. In addition, due to the sharing of this frequency band by multiple industries, the risk of non-stationary interference (such as randomly appearing frequency modulation pulse signals and frequency shift keying signals) also increases significantly, posing higher requirements for the anti-interference performance of the communication system.

[0004] Second: The 230 MHz frequency band is incompatible with the frame structure of the 5th Generation New Radio (5G NR), further exacerbating the deployment difficulty. The 5G NR frame structure is mainly designed for continuous bandwidths in the mid- and high-frequency bands, with a sub-carrier spacing of 15 kHz or its multiples, while the resource block bandwidth of the 230 MHz frequency band is fixed at 25 kHz, and the two do not match. In addition, the design of the 5G NR scheduling algorithm is based on the assumption of continuous spectral resource distribution, which cannot be applied to the discrete spectral scenario of 230 MHz, resulting in the difficulty of directly applying traditional scheduling algorithms. Therefore, in order to achieve effective communication in the discrete spectral scenario, it is necessary to redesign the scheduling mechanism of spectral resources and adopt a more flexible resource allocation strategy to meet the requirements of the 5G NR frame structure.

[0005] Thirdly, the complexity of spectrum interference is also a major challenge faced by this frequency band. In a shared environment, the communication requirements of multiple industries have led to a variety of complex interference signals in the frequency band, including frequency modulation pulse signals (Chirp) and frequency shift keying (FSK) signals. These interferences will significantly affect the demodulation performance of PDSCH in the communication system, especially in the case of low signal-to-noise ratio. To cope with the complex interference environment, the communication system must have higher frequency domain flexibility and interference suppression capabilities.

[0006] In summary, in the discrete spectrum environment of 223 MHz - 235 MHz, Carrier Aggregation (CA) technology has become the key means to address the above challenges. Through carrier aggregation, multiple discrete spectrum resources can be logically integrated into a continuous bandwidth resource, thereby significantly improving the spectrum utilization rate and transmission performance of the communication system. Carrier aggregation can also combine frequency selective scheduling technology to dynamically avoid strong interference frequency bands and enhance the anti-interference ability through flexible resource scheduling and channel estimation technology. This technology not only adapts to the characteristics of discrete spectra but also provides a reliable technical guarantee for the private network communication systems of industries such as power, gas, and civil air defense, promoting the development of traditional communication systems towards high efficiency and intelligence. Summary of the Invention

[0007] In view of this, the purpose of the present invention is to provide a PDSCH carrier aggregation system and method for a power wireless private network. According to the allocation method of OFDM symbols and subcarriers in the standard 5G NR PDSCH, the resource mapping of 5G NR PDSCH mapped to the power wireless private network is redesigned to form a resource grid for the power wireless private network, and it can support multiple bandwidth configurations, including 1 MHz, 2 MHz, and 5 MHz, while supporting two configuration modes of MIMO (Multiple Input Multiple Output) 2×2 and 2×1, meeting the requirement that different 5G NR PDSCH resource blocks can be transmitted simultaneously in the power wireless private network.

[0008] To achieve the above objective, one aspect of the present invention provides a PDSCH carrier aggregation system for a power wireless private network, which includes a 5G NR PDSCH resource block carrier aggregation transmission part and a 5G NR PDSCH carrier aggregation demodulation reception part.

[0009] Among them, the 5GNR PDSCH resource block carrier aggregation transmission part includes a 5GNR PDSCH carrier resource group generation module and a 230MHz PDSCH resource mapping module. The 5GNR PDSCH carrier resource group generation module processes the PDSCH data block at the transmitting end to obtain a 5GNR PDSCH modulated data block, maps the 5GNR PDSCH modulated data block to a 5GNR PDSCH resource block in combination with the demodulation reference signal, and then dynamically allocates different 5GNR PDSCH resource blocks according to the configuration of the aggregation bandwidth to form a 5GNR PDSCH carrier resource group; the 230MHz PDSCH resource mapping module remaps the 5GNR PDSCH resource blocks in the 5GNR PDSCH carrier resource group to the power wireless private network resource grid to form 230MHz PDSCH resource blocks; the 230MHz PDSCH resource blocks are modulated by OFDM to form power wireless private network frame data and are transmitted through the channel.

[0010] The 5GNR PDSCH carrier aggregation receiving part includes an interference filtering module, a 230MHz PDSCH resource demapping module, and a 5GNR PDSCH carrier resource group demodulation module. The interference filtering module is used to filter out interference subbands from the received power wireless private network frame data; the 230MHz PDSCH resource demapping module receives the filtered power wireless private network frame data, performs OFDM demodulation to obtain 230MHz PDSCH resource blocks, and remaps the 230MHz PDSCH resource blocks to a 5GNR PDSCH carrier resource group, and different 5GNR PDSCH resource blocks in the 5GNR PDSCH carrier resource group are processed to obtain PDSCH data blocks.

[0011] Further, when the 5GNR PDSCH carrier resource group generation module generates a 5GNR PDSCH carrier resource group, the channel coding link of the 5GNR PDSCH carrier resource group is composed of a standard 5GNR PDSCH channel coding link.

[0012] Another aspect of the present invention provides a PDSCH carrier aggregation method for a power wireless private network, and the method includes:

[0013] At the signal transmitting end, through the standard 5GNR PDSCH channel coding process, the PDSCH data block is processed into a 5GNR PDSCH modulated data block, and then mapped in combination with the demodulation reference signal to form a 5GNR PDSCH resource block;

[0014] Dynamically allocate different 5GNR PDSCH resource blocks according to the configured aggregated bandwidth to form a 5GNR PDSCH carrier resource group; when the 5GNR PDSCH resource blocks occupy time-frequency resources, the physical resource block is used as the minimum unit, where each physical resource block includes a number of consecutive subcarriers;

[0015] Remap the 5GNR PDSCH resource blocks in the 5GNR PDSCH carrier resource group to the power wireless private network resource grid in a carrier aggregation manner to form 230MHz PDSCH resource blocks, so as to adapt to the discrete subcarrier resources of the power wireless private network;

[0016] Perform OFDM modulation on the 230MHz PDSCH resource blocks to generate power wireless private network frame data and transmit it through the channel;

[0017] At the signal receiving end, receive the power wireless private network frame data for interference filtering, timing fine synchronization and frequency fine synchronization, and then perform OFDM demodulation on the power wireless private network frame data to obtain 230MHz PDSCH resource blocks;

[0018] According to the 5GNR PDSCH carrier resource group mapping rule at the signal sending end, remap the 230MHz PDSCH resource blocks to a 5GNR PDSCH carrier resource group, and the 5GNR PDSCH carrier resource group includes different 5GNR PDSCH resource blocks;

[0019] Perform channel estimation, equalization and channel decoding processes on different 5GNR PDSCH resource blocks separately to obtain PDSCH data blocks.

[0020] The beneficial effects of the present invention are as follows: In view of the special requirements for the deployment of 5GNR PDSCH in the power wireless private network, the present invention proposes a wireless resource carrier aggregation system and method for 5GNR PDSCH to adapt to the power wireless private network. According to the allocation method of OFDM symbols and subcarriers in the standard 5GNR PDSCH, the resource mapping of 5GNR PDSCH to the power wireless private network is redesigned to form a power wireless private network resource grid, which meets the requirements for the simultaneous transmission of different 5GNR PDSCH resource blocks in the power wireless private network, and improves the spectrum utilization efficiency and the anti-interference ability of the system. The specific beneficial effects are as follows:

[0021] First: The present invention proposes to form a 5GNR PDSCH carrier resource group for 5GNR PDSCH resource blocks with different configurations, and then map it to the 230MHz frequency band to form 230MHz PDSCH resource blocks, which can achieve efficient utilization of spectrum resources.

[0022] Second: The present invention adopts a timing precise synchronization and frequency precise synchronization scheme for the power wireless private network PDSCH. After completing timing and frequency synchronization for different 5G NR PDSCH resource blocks, the timing offset and frequency deviation corresponding to different 5G NR PDSCH resource blocks are calculated. After calculating their average values, the frame data of the power wireless private network is compensated, making the timing synchronization and frequency synchronization more accurate.

[0023] Third: The present invention provides a channel estimation and equalization solution for different PDSCHs in the power wireless private network. Different 5G NR PDSCH resource blocks are extracted from the 230 MHz PDSCH resource block at the receiving end, and then each block independently completes channel estimation and equalization to suppress the performance loss caused by the discontinuous subcarriers occupied by the 230 MHz PDSCH.

[0024] Fourth: The 5G NR PDSCH resource blocks can carry the same or different PDSCH data blocks. For the scenario of high communication reliability, the same PDSCH data can be transmitted to improve the repetition transmission gain. For the scenario of high-speed data transmission requirements, different PDSCH data blocks can be transmitted.

[0025] Other advantages, objectives, and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be learned from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in detail preferably with reference to the accompanying drawings, where:

[0027] Figure 1 is the structural block diagram of the PDSCH carrier aggregation system of the power wireless private network provided by an embodiment of the present invention;

[0028] Figure 2 is the schematic diagram of carrier aggregation classification under discrete carriers;

[0029] Figure 3 is the schematic flow diagram of the PDSCH carrier aggregation method of the power wireless private network provided by an embodiment of the present invention;

[0030] Figure 4 is the simulation block diagram of 5G NR PDSCH carrier aggregation;

[0031] Figure 5 is the schematic flow diagram of 5G NR PDSCH carrier aggregation simulation;

[0032] Figure 6The process of mapping 5G NR PDSCH carrier resource groups to power wireless private network resource grids;

[0033] Figure 7 The process of remapping power wireless private network time-frequency resources to 5G NR PDSCH carrier resource groups;

[0034] Figure 8 The performance of 5G NR PDSCH resource block transmissions in scenario 1 under different SNR conditions, Figure 8 (a) shows the trend of the successful transmission rate, Figure 8 (b) shows the trend of the bit error rate;

[0035] Figure 9 Schematic diagram of the throughput of a single carrier and single layer of PDSCH under different signal-to-noise ratios;

[0036] Figure 10 The performance of 5G NR PDSCH resource block transmissions in scenario 2 under different SNR conditions, Figure 10 (a) shows the trend of the successful transmission rate, Figure 10 (b) shows the trend of the bit error rate;

[0037] Figure 11 Schematic diagram of the throughput of a single carrier and double layers of PDSCH under different signal-to-noise ratios;

[0038] Figure 12 The performance of the 5G NR PDSCH resource block rx5gNrBlock1 transmissions in scenario 3 under different SNR conditions, Figure 12 (a) shows the trend of the successful transmission rate, Figure 12 (b) shows the trend of the bit error rate;

[0039] Figure 13 The performance of the 5G NR PDSCH resource block rx5gNrBlock2 transmissions in scenario 3 under different SNR conditions, Figure 13 (a) shows the trend of the successful transmission rate, Figure 13 (b) shows the trend of the bit error rate;

[0040] Figure 14 The performance of the throughput of 5G NR PDSCH carrier resource groups under different SNR conditions;

[0041] Figure 15 The performance of the 5G NR PDSCH resource block rx5gNrBlock1 transmissions in scenario 4 under different SNR conditions, Figure 15 (a) shows the trend of the successful transmission rate, Figure 15 (b) shows the trend of the bit error rate;

[0042] Figure 16 For the performance of the 5G NR PDSCH resource block rx5gNrBlock2 in scenario 4 under different SNR conditions, Figure 16 (a) shows the trend of the successful transmission rate, Figure 16 (b) shows the trend of the bit error rate;

[0043] Figure 17 For the throughput of the 5G NR PDSCH carrier resource group in scenario 4 under different SNR conditions;

[0044] Figure 18 For the performance of the 5G NR PDSCH resource block rx5gNrBlock1 in scenario 5 under different SNR conditions, Figure 18 (a) shows the trend of the successful transmission rate, Figure 18 (b) shows the trend of the bit error rate;

[0045] Figure 19 For the performance of the 5G NR PDSCH resource block rx5gNrBlock2 in scenario 5 under different SNR conditions, Figure 19 (a) shows the trend of the successful transmission rate, Figure 19 (b) shows the trend of the bit error rate;

[0046] Figure 20 For the performance of the 5G NR PDSCH resource block rx5gNrBlock3 in scenario 5 under different SNR conditions, Figure 20 (a) shows the trend of the successful transmission rate, Figure 20 (b) shows the trend of the bit error rate;

[0047] Figure 21 For the performance of the 5G NR PDSCH resource block rx5gNrBlock4 in scenario 5 under different SNR conditions, Figure 21 (a) shows the trend of the successful transmission rate, Figure 21 (b) shows the trend of the bit error rate;

[0048] Figure 22 For the performance of the 5G NR PDSCH resource block rx5gNrBlock5 in scenario 5 under different SNR conditions, Figure 22 (a) shows the trend of the successful transmission rate, Figure 22 (b) shows the trend of the bit error rate;

[0049] Figure 23 For the throughput of the 5G NR PDSCH carrier resource group in scenario 5 under different SNR conditions;

[0050] Figure 24 Performance of the 5G NR PDSCH resource block rx5gNrBlock1 in scenario 6 under different SNR conditions Figure 24 (a) Variation trend of the successful transmission rate Figure 24 (b) Variation trend of the bit error rate

[0051] Figure 25 Performance of the 5G NR PDSCH resource block rx5gNrBlock2 in scenario 6 under different SNR conditions Figure 25 (a) Variation trend of the successful transmission rate Figure 25 (b) Variation trend of the bit error rate

[0052] Figure 26 Performance of the 5G NR PDSCH resource block rx5gNrBlock3 in scenario 6 under different SNR conditions Figure 26 (a) Variation trend of the successful transmission rate Figure 26 (b) Variation trend of the bit error rate

[0053] Figure 27 Performance of the 5G NR PDSCH resource block rx5gNrBlock4 in scenario 6 under different SNR conditions Figure 27 (a) Variation trend of the successful transmission rate Figure 27 (b) Variation trend of the bit error rate

[0054] Figure 28 Performance of the 5G NR PDSCH resource block rx5gNrBlock5 in scenario 6 under different SNR conditions Figure 28 (a) Variation trend of the successful transmission rate Figure 28 (b) Variation trend of the bit error rate

[0055] Figure 29 Throughput of the 5G NR PDSCH carrier resource group in scenario 6 under different SNR conditions Specific implementation manners

[0056] The following uses specific specific examples to illustrate the implementation manners of the present invention. 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 manners. The details in this specification can also be modified or changed 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 only illustrate the basic concept of the present invention in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0057] Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams rather than actual drawings, and should not be construed as limiting the present invention; in order to better illustrate the embodiments of the present invention, some components in the attached drawings will be omitted, enlarged or reduced, which does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted.

[0058] In the attached drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the attached drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the attached drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0059] In view of the special requirements of 5GNR PDSCH deployment in the power wireless private network and the discrete shared frequency band environment of 223 MHz to 235 MHz, the present invention proposes a wireless resource carrier aggregation system and method for 5GNR PDSCH to adapt to the power wireless private network. According to the allocation method of OFDM symbols and subcarriers in the standard 5GNR PDSCH, the resource mapping of 5GNR PDSCH mapped to the power wireless private network is redesigned to form a resource grid for the power wireless private network. The present invention supports multiple bandwidth configurations, including 1 MHz, 2 MHz, and 5 MHz, and at the same time supports two configuration modes of MIMO 2×2 and 2×1, meeting the requirement that different 5GNR PDSCH resource blocks can be transmitted simultaneously in the power wireless private network.

[0060] As Figure 1 shown, it is an embodiment of the PDSCH carrier aggregation system for the power wireless private network, which consists of two parts, namely, the 5GNR PDSCH resource block carrier aggregation transmission part and the 5GNR PDSCH de-carrier aggregation reception part. Among them, the 5GNR PDSCH resource block carrier aggregation transmission part consists of a 5GNR PDSCH carrier resource group generation module and a 230 MHz PDSCH resource mapping module. The 5GNR PDSCH de-carrier aggregation reception part consists of an interference filtering module, a 230 MHz PDSCH resource demapping module, a 5GNR PDSCH carrier resource group demodulation module, a timing synchronization module, a frequency synchronization module, a channel estimation and equalization module, and a 5GNR PDSCH channel decoding module.

[0061] The following is a detailed description of each module:

[0062] 1) 5G NR PDSCH Carrier Resource Group Generation Module

[0063] The channel coding link of the power wireless private network PDSCH carrier resource group is composed of the standard 5G NR PDSCH channel coding link, specifically including the transmission information data block, scrambling, code block segmentation, LDPC (Low-Density Parity-Check Coding) coding, rate matching, modulation mapping, and PDSCH resource mapping. After being processed by this module, the PDSCH data block at the sending end obtains the 5G NR PDSCH modulated data block, jointly demodulates the reference signal, and maps it into the standard 5G NR PDSCH resource block, which includes data and the demodulation reference signal (referred to as DMRS for short). According to the configuration of the aggregated bandwidth (1 MHz, 2 MHz, 5 MHz), different 5G NR PDSCH resource blocks can be dynamically allocated to form the 5G NR PDSCH carrier resource group. The time-frequency resource sizes of these resource blocks are configured in the same or different ways, specifically depending on the actual requirements and spectrum environment of the power wireless private network. At the same time, each module in the channel coding link (such as scrambling, LDPC coding, rate matching, etc.) can use a unified or independent configuration scheme to adapt to the bandwidth and frequency characteristics of different resource blocks.

[0064] 2) 230 MHz PDSCH Resource Mapping Module

[0065] Carrier aggregation configured according to the actual requirements and spectrum environment of the power wireless private network can support three types: Type (A), Type (B), and Type (C), as Figure 2 shown. Map the 5G NR PDSCH carrier resource group to the power wireless private network resource grid to form the 230 MHz PDSCH resource block. When the network allocates power wireless private network resources, it preferentially selects the most continuous subcarrier resource blocks to carry PDSCH transmission. The 230 MHz PDSCH resource block undergoes OFDM modulation to form the power wireless private network frame data.

[0066] Among them, the three types of Type (A), Type (B), and Type (C) are respectively:

[0067] Type (A), in-band continuous carrier aggregation (CA): In the power wireless private network resource grid, the 5G NR PDSCH carrier resource group uses continuous aggregated component carriers (CC). The 5G NR PDSCH carrier resource group maps different 5G NR PDSCH resource blocks to the power wireless private network resource grid with continuous subcarriers according to the continuous subcarrier positions in the power wireless private network resource grid.

[0068] Type (B), In-band discontinuous CA: In the power wireless private network resource grid, when continuous spectrum block aggregation cannot be provided for users within the frequency band, discontinuous components carriers within the frequency band are aggregated discontinuously. The 5GNR PDSCH carrier resource group maps different 5GNR PDSCH resource blocks to the power wireless private network resource grid with discontinuous subcarriers according to the discontinuous subcarrier positions in the power wireless private network resource grid.

[0069] Type (C), In-band discontinuous hybrid CA: In the power wireless private network resource grid, when full continuous spectrum block aggregation cannot be provided for users within the frequency band, partial continuous and partial discontinuous aggregation is adopted for the discontinuous components carriers within the frequency band. The 5GNR PDSCH carrier resource group maps different 5GNR PDSCH resource blocks to the power wireless private network resource grid with partially continuous subcarriers according to the available subcarrier positions in the power wireless private network resource grid.

[0070] 3) Interference filtering module

[0071] The power wireless private network resource grid consists of 4096 2.5KHz subcarriers and 20 OFDM symbols, but can be used discontinuously in the frequency domain. Some 25KHz subbands are used by other systems, which are called interference subbands. When the 5GNR PDSCH resource block is mapped to the power wireless private network resource grid, the interference subbands need to be filtered out from the 230MHz PDSCH resource block. In this embodiment, a notch filter is used to remove the interference subbands, and the center frequency of the notch filter is the center frequency of the 25KHz interference subband.

[0072] 4) 230MHz PDSCH resource demapping module

[0073] Receive the air power wireless private network frame data, remove the interference subbands through the interference filter, perform OFDM demodulation to obtain the 230MHz PDSCH resource block, and remap the 230MHz PDSCH resource block to the 5GNR PDSCH carrier resource group according to the mapping rule of the 5GNR PDSCH carrier resource group at the sending end. This resource group contains 5GNR PDSCH resource blocks with the same or different PDSCH configurations for the user PDSCH.

[0074] 5) 5GNR PDSCH carrier resource group demodulation module

[0075] Extract different 5GNR PDSCH resource blocks from the 5GNR PDSCH carrier resource group according to the time-frequency resource positions corresponding to the 5GNR PDSCH carrier resource group at the sending end.

[0076] 6) Modules such as timing synchronization, frequency synchronization, channel estimation and equalization, and 5GNR PDSCH channel decoding

[0077] This part separately completes timing synchronization, frequency synchronization, channel estimation and equalization, and 5GNR PDSCH channel decoding for different 5GNR PDSCH resource blocks in the 5GNR PDSCH carrier resource group.

[0078] Such as Figure 3 As shown, it is an embodiment of the PDSCH carrier aggregation method for the power wireless private network. The method includes:

[0079] Step 1: The 5GNR PDSCH carrier resource group of the power wireless private network consists of multiple 5GNR PDSCH resource blocks, and the channel coding of each 5GNR PDSCH resource block is fully compatible with the standard 5GNR PDSCH channel coding process.

[0080] The formation process of the 5GNR PDSCH carrier resource group is as follows: scramble the PDSCH data block, perform code block segmentation, LDPC coding, rate matching, and modulation mapping to form a 5GNR PDSCH modulated data block, and then map it together with the demodulation reference signal to form a complete 5GNR PDSCH resource block. Different 5GNR PDSCH resource blocks can carry the same or different PDSCH data blocks. According to the configuration of the aggregation bandwidth (1MHz, 2MHz, 5MHz), different 5GNR PDSCH resource blocks are dynamically allocated to form a 5GNR PDSCH carrier resource group.

[0081] Step 2: In the standard 5GNR frame structure, each time slot consists of 14 OFDM symbols, and the maximum PDSCH time-domain resource allocation is defined in units of time slots, and part or all of the time-frequency resources are occupied according to the transmission PDSCH resource requirements. In the power wireless private network, the wireless frame length of the power wireless private network is 10ms and consists of 20 OFDM symbols. The wireless frame of the power wireless private network can carry 5GNR PDSCH resource blocks with different configurations in the 5GNR PDSCH carrier resource group, and these resource blocks occupy different time-frequency resources in the power wireless private network resource grid.

[0082] Step 3: The 5GNR PDSCH resource blocks in the 5GNR PDSCH carrier resource group occupy time-frequency resources with physical resource blocks (abbreviated as PRBs) as the smallest unit. Each PRB contains 12 consecutive subcarriers, in which the demodulation reference signal is embedded. The time-frequency resource grid of the power wireless private network is a discrete distribution of subcarrier resources, and there is a non-continuous characteristic between its subcarrier resource blocks. Different 5GNR PDSCH resource blocks are remapped in a carrier aggregation manner to adapt to the power wireless private network resource grid.

[0083] Step 4: Map the 5G NR PDSCH carrier resource group to the power wireless private network resource grid. The standard 5G NR PDSCH resource block continuously occupies 12N (N is a positive integer) subcarriers in the frequency domain, and there may be unavailable 25 KHz subbands among the 12N subcarriers. In the time domain, it continuously occupies the same number of OFDM symbols. Finally, map the 5G NR PDSCH carrier resource group to a 230 MHz PDSCH resource block. The 230 MHz PDSCH resource block undergoes OFDM modulation to obtain the power wireless private network frame data.

[0084] Step 5: At the receiving end, after receiving the power wireless private network frame data, perform interference filtering, perform OFDM demodulation to obtain the 230 MHz PDSCH resource block, and remap the 230 MHz PDSCH resource block to the 5G NR PDSCH carrier resource group according to the 5G NR PDSCH carrier resource group mapping rule at the transmitting end. The 5G NR PDSCH carrier resource group includes different 5G NR PDSCH resource blocks.

[0085] Step 6: For different 5G NR PDSCH resource blocks, use the demodulation reference signal to perform timing synchronization and frequency synchronization to obtain the timing offset corresponding to different 5G NR PDSCH resource blocks and the frequency deviation Δf x , and after averaging, compensate the power wireless private network frame data. The calculation formula is:

[0086]

[0087] Δf = mean(Δf x )

[0088] where mean(·) represents the calculation of the average value.

[0089] Step 7: Perform OFDM demodulation on the power wireless private network frame data after compensation to obtain the 230 MHz PDSCH resource block, and remap the 230 MHz PDSCH resource block to obtain the 5G NR PDSCH carrier resource group. The 5G NR PDSCH carrier resource group includes different 5G NR PDSCH resource blocks.

[0090] Step 8: Independently complete channel estimation and equalization for different 5G NR PDSCH resource blocks, complete the 5G NR channel decoding process, and obtain the corresponding PDSCH data blocks.

[0091] As Figure 4 shown, it is a simulation embodiment based on MATLAB, and through this embodiment, the application method of carrier aggregation in the power wireless private network resource grid is further illustrated.

[0092] In this embodiment, to evaluate the impact of interfering FSK signals on the decoding performance of the PDSCH channel, the FSK signal is configured to occupy the subcarrier positions that the PDSCH in the power wireless private network resource grid needs to occupy. Specifically, the FSK signal occupies the following subcarrier positions: 851, 852, 853, 854, 855, 856, 857, 858, 859, 860, 931, 932, 933, 934, 935, 936, 937, 938, 939, 940. The total bandwidth corresponding to these subcarrier positions is 50 kHz. Since the spectral distributions of the FSK signal and the PDSCH signal overlap, it can directly interfere with the PDSCH data block and the DMRS signal, thereby affecting the demodulation performance of the PDSCH signal and the transmission quality of the system.

[0093] This embodiment supports multiple bandwidth configurations, including 1 MHz, 2 MHz, and 5 MHz, and also supports MIMO configurations, specifically two modes: 2×2 and 2×1. When the MIMO configuration is 2×2, the PDSCH layer mapping configuration is 2; when the MIMO configuration is 2×1, the PDSCH layer mapping configuration is 1.

[0094] To clearly show the method of aggregating the 5G NR PDSCH carrier resource group in the power wireless private network resource grid carrier, this embodiment uses MATLAB for simulation verification to simulate the transmission and reception process of one frame (10 ms) of data. The parameters set in the simulation are shown in Table 1.

[0095] Table 1

[0096]

[0097] The 5G NR PDSCH carrier resource group is denoted as tx5gNrBlockGroup, and different 5G NR PDSCH resource blocks are denoted as tx5gNrBlockX, where X represents the 5G NR PDSCH resource block number.

[0098] In this embodiment, when the bandwidth is configured as 1, 2, or 5 MHz, different 5G NR PDSCH resource blocks in the 5G NR PDSCH carrier resource group are configured under the same conditions. When the bandwidth is configured as 1 MHz, one 5G NR PDSCH resource block is configured, denoted as tx5gNrBlock1, which occupies 14 consecutive OFDM symbols in the time domain resource and 396 consecutive subcarriers in the frequency domain resource (12×33 = 396). In tx5gNrGrid, the DMRS occupies the OFDM symbol positions 2 and 11, and occupies the frequency domain resource at an interval of 1, such as 1, 3, …, 393, 395. The modulation method is quadrature phase shift keying (QPSK), and the code rate is 0.478. When the bandwidth is configured as 2 MHz, two identical 5G NR PDSCH resource blocks are configured under the same configuration conditions as those of 1 MHz above, denoted as tx5gNrBlock1 and tx5gNrBlock2. When the bandwidth is configured as 5 MHz, five identical 5G NR PDSCH resource blocks are configured under the same configuration conditions as those of 1 MHz above, denoted as tx5gNrBlock1, tx5gNrBlock2, tx5gNrBlock3, tx5gNrBlock4, and tx5gNrBlock5.

[0099] The MATLAB simulation platform is used to verify the receive and transmit links of tx5gNrBlockGroup in the power wireless private network resource grid. In this embodiment, tx5gNrBlockX in tx5gNrBlockGroup is first remapped to the power wireless private network resource grid to form a 230 MHz PDSCH resource block, denoted as txNr230Grid. The power wireless private network resource grid undergoes OFDM modulation to form the power wireless private network frame data, denoted as txWaveform. txWaveform is simulated through the NR channel (CDL), and the output power wireless private network frame data is denoted as rxWaveform. rxWaveform forms a 230 MHz PDSCH resource block after OFDM demodulation, denoted as rxNr230Grid. Different 5G NR PDSCH resource blocks in the 230 MHz PDSCH resource block are extracted, denoted as rx5gNrBlockX, and then are spliced into a complete 5G NR PDSCH modulation data block after timing synchronization, frequency synchronization, channel estimation, and equalization. After completing the channel decoding post-processing of PDSCH, the PDSCH data block is obtained, denoted as TBDataX.

[0100] The simulation process of 5G NR PDSCH carrier aggregation is as Figure 5 shown, and the specific process is as follows:

[0101] Step 1: The PDSCH data block at the transmitting end passes through the standard 5GNR PDSCH channel coding link. After processing, the 5GNR PDSCH modulated data block is obtained. By jointly demodulating the reference signal, it is mapped into the standard 5GNR PDSCH resource block (396×14×Layer). When the PDSCH layer mapping is 1, i.e., Layer is 1; when the PDSCH layer mapping is 2, i.e., Layer is 2, which is denoted as tx5gNrBlock. In this embodiment, it supports the simultaneous transmission of multiple PDSCH data blocks, forming multiple tx5gNrBlockX, where X represents the PDSCH resource block number, as shown in Figure 5 Step 1.

[0102] Step 2: According to the bandwidth configuration, including 1MHz, 2MHz, and 5MHz, different tx5gNrBlockX are combined into the 5GNR PDSCH carrier resource group tx5gNrBlockGroup and mapped to the power wireless private network resource grid (4096×20, 4096 subcarriers, 20 OFDM symbol resource grids), forming a 230MHz PDSCH resource block (4096×20×2), which is denoted as txNr230Grid. For the specific mapping positions of the subcarriers, in this embodiment, when the bandwidth configuration is 1MHz, as shown in Table 2; when it is 2MHz, as shown in Table 3; when it is 5MHz, as shown in Table 4. The subcarrier positions occupied by the FSK interference signal are shown in Table 5. The mapping process is as shown in Figure 6 shown.

[0103] Table 2

[0104] 454-465 466-477 478-489 502-513 514-525 526-537 538-549 562-573 574-585 586-597 598-609 610-621 622-633 634-645 646-657 658-669 695-706 724-735 736-747 762-773 774-785 786-797 798-809 810-821 822-833 834-845 846-857 858-869 884-895 896-907 908-919 920-931 932-943

[0105] Table 3

[0106] 454-465 466-477 478-489 502-513 514-525 526-537 538-549 562-573 574-585 586-597 598-609 610-621 622-633 634-645 646-657 658-669 695-706 724-735 736-747 762-773 774-785 786-797 798-809 810-821 822-833 834-845 846-857 858-869 884-895 896-907 908-919 920-931 932-943 1058-1069 1070-1081 1082-1093 1094-1105 1106-1117 1118-1129 1130-1141 1142-1165 1166-1177 1178-1189 1190-1201 1202-1213 1214-1225 1226-1237 1238-1249 1250-1261 1262-1273 1274-1285 1286-1297 1298-1309 1310-1321 1322-1333 1334-1345 1346-1357 1358-1369 1370-1381 1382-1393 1394-1405 1406-1417 1418-1429 1430-1441 1442-1453 1454-1465

[0107] Table 4

[0108] 454-465 466-477 478-489 502-513 514-525 526-537 538-549 562-573 574-585 586-597 598-609 610-621 622-633 634-645 646-657 658-669 695-706 724-735 736-747 762-773 774-785 786-797 798-809 810-821 822-833 834-845 846-857 858-869 884-895 896-907 908-919 920-931 932-943 1058-1069 1070-1081 1082-1093 1094-1105 1106-1117 1118-1129 1130-1141 1142-1165 1166-1177 1178-1189 1190-1201 1202-1213 1214-1225 1226-1237 1238-1249 1250-1261 1262-1273 1274-1285 1286-1297 1298-1309 1310-1321 1322-1333 1334-1345 1346-1357 1358-1369 1370-1381 1382-1393 1394-1405 1406-1417 1418-1429 1430-1441 1442-1453 1454-1465 1566-1577 1578-1589 1590-1601 1602-1613 1614-1625 1626-1649 1650-1661 1662-1673 1674-1685 1686-1697 1698-1709 1710-1721 1722-1733 1734-1745 1746-1769 1770-1781 1782-1793 1794-1805 1806-1817 1818-1829 1830-1841 1842-1853 1854-1865 1866-1889 1890-1901 1902-1913 1914-1925 1926-1937 1938-1949 1950-1961 1962-1973 1974-1985 1986-2048 2149-2160 2172-2183 2184-2195 2196-2207 2208-2219 2246-2257 2258-2269 2270-2281 2282-2293 2294-2305 2326-2337 2338-2349 2350-2361 2362-2373 2374-2385 2386-2397 2398-2409 2410-2421 2422-2433 2434-2445 2446-2457 2458-2469 2470-2481 2482-2493 2494-2505 2506-2517 2518-2529 2530-2541 2542-2553 2554-2553 2554-2565 2566-2577 2578-2589 2590-2601 2702-2713 2714-2725 2726-2737 2738-2749 2750-2761 2762-2773 2774-2785 2786-2797 2798-2827 2828-2839 2840-2935 2936-2947 2948-2959 2960-2971 2972-3006 3007-3018 3019-3030 3031-3056 3057-3068 3069-3080 3081-3092 3093-3104 3105-3116 3117-3128 3129-3140 3141-3152 3153-3164 3165-3176 3177-3188 3189-3200 3201-3245 3246-3257 3258-3269

[0109] Table 5

[0110] 851 852 853 854 855 856 857 858 859 860 931 932 933 934 935 936 937 938 939 940

[0111] Step 3: Modulate the 230 MHz PDSCH resource block txNr230Grid using OFDM. Perform an inverse fast Fourier transform of 4096 points on each OFDM symbol in txNr230Grid to obtain 4096-point OFDM symbol data. Add a cyclic prefix of 1024 points at the head to form a complete OFDM symbol time-domain data, with a total of 20 OFDM symbols, generating a power wireless private network frame data (102400×2) of the length of a wireless frame (10 ms), denoted as txWaveform.

[0112] Step 4: The power wireless private network frame data txWaveform passes through the simulated CDL channel. Output the power wireless private network frame data (102400×AntNum). When the number of receiving antennas is 2, AntNum is 2; when the number of receiving antennas is 1, AntNum is 1, denoted as rxWaveform. Among them, the simulated CDL channel uses the channel model provided by MATLAB, and the sampling clock of the channel model selects the sampling frequency of the power wireless private network, which is 10240000. Different signal-to-noise ratios can be selected in the simulation for the performance evaluation of PDSCH channel decoding.

[0113] Step 5: Demodulate the power wireless private network frame data rxWaveform using OFDM to obtain the 230 MHz PDSCH resource block (4096×20×AntNum). AntNum is the same as in Step 4, denoted as rxNr230Grid. Remap the 230 MHz PDSCH resource block rxNr230Grid to the 5GNR PDSCH carrier resource group. According to the time-frequency resource mapping of different 5GNR PDSCH resource blocks at the transmitting end, extract the corresponding 5GNR PDSCH resource block from the 5GNR PDSCH carrier resource group, denoted as rx5gNrBlockX, where the configuration of X is the same as in Step 1. The demapping process is as Figure 7 shown.

[0114] Scenario 1: PDSCH single-carrier single-layer transmission performance in the 2×1 MIMO, 1 MHz, CDL channel scenario

[0115] In Scenario 1, assume that the positions of the spectrum resources occupied by the FSK signal in the power wireless private network resource grid are as shown in Table 5. In this scenario, the 5GNR PDSCH carrier resource group contains a 5GNR PDSCH resource block rx5gNrBlock1, and the corresponding subcarriers are spectrally distributed in the power wireless private network resource grid at the subcarrier positions corresponding to Table 2, strictly following the spectrum resource configuration requirements of the resource grid. Evaluate the channel decoding performance of PDSCH under different signal-to-noise ratio (SNR) conditions, and complete 500 simulations using the Monte Carlo method to verify the stability of the signal performance under the CDL channel.

[0116] Figure 8 Fully demonstrates the performance of 5G NR PDSCH resource block transmission under different SNR conditions, including the changing trends of throughput (success transmission rate) and bit error rate (BER), and deeply reflects the transmission characteristics of the system in a complex channel environment. Figure 8 (a) Shows the relationship between the success transmission rate of PDSCH data blocks and SNR. It can be seen that as the signal-to-noise ratio increases, the success transmission rate of PDSCH gradually increases. When the SNR is lower than -35 dB, the success transmission rate decreases significantly, indicating that under low signal-to-noise ratio conditions, the signal is severely affected by noise interference, resulting in a higher probability of demodulation failure. However, when the SNR exceeds -35 dB, the success transmission rate rapidly increases and approaches 100%, indicating that the demodulation scheme can effectively cope with noise interference under medium and low signal-to-noise ratio conditions. This result shows that the present invention can achieve reliable data block transmission in a low signal-to-noise ratio environment, ensuring the stability and efficiency of communication. Figure 8 (b) Further analyzes the trend of the bit error rate of PDSCH with the change of SNR. Under low signal-to-noise ratio conditions, when the SNR is lower than -35 dB, the bit error rate is relatively high, indicating that under these conditions, the noise has a more serious impact on the received signal, and the channel equalization and demodulation scheme cannot completely eliminate the error. However, as the signal-to-noise ratio increases, the bit error rate rapidly decreases. When the SNR reaches -35 dB, the bit error rate drops to zero and remains in a zero-error state thereafter.

[0117] Figure 9 Shows the performance of the throughput of the 5G NR PDSCH carrier resource group under different SNR conditions. It can be seen that as the SNR increases, the throughput shows an obvious increasing trend. However, when the SNR exceeds -35 dB, the increase in throughput gradually tends to saturate. This phenomenon is mainly affected by the channel capacity limit, that is, under high SNR conditions, the further improvement of signal quality has limited effect on the increase in throughput. The maximum throughput in this scenario is 640 kbps.

[0118] Scenario 2: PDSCH single-carrier double-layer transmission performance in the 2×2 MIMO, 1 MHz, CDL channel scenario

[0119] In Scenario 2, it is assumed that the positions of the spectrum resources occupied by the FSK signal in the spectrum resource grid of the dedicated power wireless network are shown in Table 5. In this scenario, the 5GNR PDSCH carrier resource group is configured the same as in Scenario 1, that is, it contains a 5GNR PDSCH resource block rx5gNrBlock1. The corresponding subcarriers are spectrally distributed in the spectrum resource grid of the dedicated power wireless network at the subcarrier positions corresponding to Table 2, strictly following the spectrum resource configuration requirements of the resource grid. The channel decoding performance of the PDSCH is evaluated under different SNR conditions, and 500 simulations are completed using the Monte Carlo method to verify the stability of the signal performance under the CDL channel.

[0120] Figure 10 The following shows the performance of the 5GNR PDSCH resource block transmission under different SNR conditions, including the changing trends of throughput, successful transmission rate, and bit error rate, which deeply reflects the transmission characteristics of the system in a complex channel environment. Among them, Figure 10 (a) shows the relationship between the successful transmission rate of the PDSCH data block and the SNR. It can be seen that as the signal-to-noise ratio increases, the successful transmission rate of the PDSCH gradually increases. When the SNR is lower than -32 dB, the successful transmission rate decreases significantly, indicating that under low signal-to-noise ratio conditions, the signal is severely affected by noise interference, resulting in a higher probability of demodulation failure. However, when the SNR exceeds -32 dB, the successful transmission rate rapidly increases and approaches 100%, indicating that the demodulation scheme can effectively cope with noise interference under medium and low signal-to-noise ratio conditions. This result shows that the present invention can achieve reliable data block transmission in a low signal-to-noise ratio environment, ensuring the stability and efficiency of communication. Figure 10 (b) further analyzes the trend of the bit error rate of the PDSCH changing with the SNR. Under low signal-to-noise ratio conditions, when the SNR is lower than -32 dB, the bit error rate is relatively high, indicating that under these conditions, the noise has a more serious impact on the received signal, and the channel equalization and demodulation scheme cannot completely eliminate the error. However, as the signal-to-noise ratio increases, the bit error rate rapidly decreases. When the SNR reaches -32 dB, the bit error rate drops to zero and remains in a zero-bit-error state thereafter.

[0121] Figure 11The throughput performance of the 5G NR PDSCH carrier resource group under different SNR conditions is shown. As the SNR increases, the throughput shows an obvious growth trend. However, when the SNR exceeds -32 dB, the throughput growth gradually tends to saturate. This phenomenon is mainly affected by the channel capacity limit, that is, under high SNR conditions, the further improvement of signal quality has limited effect on the improvement of throughput. In this scenario, the maximum throughput is 1281 kbps. Compared with Scenario 1, since the MIMO configuration is 2×2 and the layer mapping support of PDSCH is configured with 2 layers, the throughput in this scenario doubles, significantly improving the data transmission capacity. This performance improvement indicates that by introducing multi-antenna technology, the network can utilize spectrum resources more efficiently, thus transmitting more data within the same frequency range.

[0122] Scenario 3: Performance of PDSCH Carrier Aggregation (Single Layer) in the 2×1 MIMO, 2 MHz, CDL Channel Scenario

[0123] In Scenario 3, it is assumed that the positions of the spectrum resources occupied by the FSK signal in the power wireless private network resource grid are as shown in Table 5. In this scenario, the 5G NR PDSCH carrier resource group contains 2 5G NR PDSCH resource blocks: rx5gNrBlock1 and rx5gNrBlock2, and the corresponding subcarriers are spectrally distributed in the power wireless private network resource grid at the subcarrier positions corresponding to Table 3, strictly following the spectrum resource configuration requirements of the resource grid. The channel decoding performance of PDSCH is evaluated under different SNR conditions, and 500 simulations are completed using the Monte Carlo method to verify the stability of the signal performance under the CDL channel.

[0124] Figure 12 、 13 Fully demonstrates the transmission performance of the 5G NR PDSCH resource block under different SNR conditions, including the change trends of throughput success rate and bit error rate, and deeply reflects the transmission characteristics of the system in a complex channel environment.

[0125] Among them, Figure 12(a), 13(a) depicts the relationship between the successful transmission rate of different PDSCH data blocks and SNR. It can be seen from the figure that as the SNR increases, the successful transmission rate of PDSCH gradually increases. When the 5GNR PDSCH resource block is rx5gNrBlock1, when the SNR is below -32 dB, the successful transmission rate decreases significantly. When the SNR exceeds -32 dB, the successful transmission rate rapidly increases and approaches 100%. When the 5GNR PDSCH resource block is rx5gNrBlock2, when the SNR is below -31 dB, the successful transmission rate decreases significantly. When the SNR exceeds -31 dB, the successful transmission rate rapidly increases and approaches 100%. This shows that under low SNR conditions, the signal is severely affected by noise interference, resulting in a high probability of demodulation failure. As the SNR increases, the demodulation scheme proposed in the present invention can effectively cope with noise interference under medium and low SNR conditions.

[0126] Figure 12 (b), 13(b) further analyzes the trend of the bit error rate of different PDSCHs changing with SNR. When the 5GNR PDSCH resource block is rx5gNrBlock1 and the SNR is below -32 dB, and when the 5GNR PDSCH resource block is rx5gNrBlock2 and the SNR is below -31 dB, the bit error rates are both relatively high, indicating that under these conditions, the influence of noise on the received signal is relatively serious, and the channel equalization and demodulation schemes cannot completely eliminate errors. However, as the SNR increases, the bit error rate rapidly decreases. When the 5GNR PDSCH resource block is rx5gNrBlock1 and the SNR reaches -32 dB, and when the 5GNR PDSCH resource block is rx5gNrBlock2 and the SNR reaches -31 dB, the bit error rate drops to zero and remains in a zero-bit-error state thereafter.

[0127] Figure 14 The throughput of the 5GNR PDSCH carrier resource group under different SNR conditions is shown. As the SNR increases, the throughput shows an obvious increasing trend. However, when the SNR exceeds -31 dB, the throughput growth gradually tends to saturate. This phenomenon is mainly affected by the channel capacity limit, that is, under high SNR conditions, the further improvement of signal quality has limited effect on the improvement of throughput. The maximum throughput in this scenario is 1280 kbps. Since the 5GNR PDSCH carrier resource group contains 2 5GNR PDSCH resource blocks, the peak throughput is twice that of Scenario 1.

[0128] Scenario 4: PDSCH Carrier Aggregation (Dual-Layer) Transmission Performance in a 2×2 MIMO, 2 MHz, CDL Channel Scenario

[0129] In Scenario 4, assume that the positions of the spectrum resources occupied by the FSK signal in the power wireless private network resource grid are shown in Table 5. In this scenario, the 5GNR PDSCH carrier resource group contains 2 5GNR PDSCH resource blocks: rx5gNrBlock1 and rx5gNrBlock2. The corresponding subcarriers are spectrally distributed in the power wireless private network resource grid according to the subcarrier positions in Table 3, strictly following the spectrum resource configuration requirements of the resource grid. The channel decoding performance of the PDSCH is evaluated under different SNR conditions, and 500 simulations are completed using the Monte Carlo method to verify the stability of the signal performance under the CDL channel.

[0130] Figure 15 、 16 Fully demonstrates the performance of the 5GNR PDSCH resource block transmission under different SNR conditions, including the change trends of throughput, successful transmission rate, and bit error rate, and deeply reflects the transmission characteristics of the system in a complex channel environment.

[0131] Figure 15 (a), Figure 16(a) shows the relationship between the successful transmission rate of different PDSCH data blocks and the SNR. It can be seen that as the signal-to-noise ratio increases, the successful transmission rate of the PDSCH gradually increases. When the 5GNR PDSCH resource block is rx5gNrBlock1, when the SNR is lower than -22 dB, the successful transmission rate decreases significantly. When the SNR exceeds -22 dB, the successful transmission rate rapidly increases and approaches 100%. When the 5GNR PDSCH resource block is rx5gNrBlock2, when the SNR is lower than -22 dB, the successful transmission rate decreases significantly. When the SNR exceeds -22 dB, the successful transmission rate rapidly increases and approaches 100%. This shows that under low signal-to-noise ratio conditions, the signal is severely affected by noise interference, resulting in a high probability of demodulation failure. As the signal-to-noise ratio increases, the demodulation scheme proposed in the present invention can effectively cope with noise interference under medium and low signal-to-noise ratio conditions. Compared with Scenario 3, since the layer mapping of the PDSCH is 2 layers, the amount of data transmitted is larger, and the data stream is more vulnerable to noise and interference signals, resulting in a higher signal-to-noise ratio required for correct demodulation.

[0132] Figure 15(b) Figure 16(b) shows the trends of different PDSCH bit error rates varying with SNR. The 5G NR PDSCH resource block is rx5gNrBlock1 when the SNR is higher than -22 dB, and is rx5gNrBlock2 when the SNR is lower than -22 dB. In both cases, the bit error rates are relatively high, indicating that under such conditions, the impact of noise on the received signal is relatively severe, and the channel equalization and demodulation schemes cannot completely eliminate errors. However, as the SNR increases, the bit error rate decreases rapidly. When the SNR reaches -22 dB for rx5gNrBlock1 or rx5gNrBlock2, the bit error rate drops to zero and remains at zero thereafter. Similarly, compared with Scenario 3, since the layer mapping of PDSCH is 2 layers and the amount of data transmitted is larger, the data stream is more vulnerable to noise and interference signals, resulting in a relatively higher SNR being required for correct demodulation.

[0133] Figure 17 The throughput performance of the 5G NR PDSCH carrier resource group under different SNR conditions is shown. It can be seen that as the SNR increases, the throughput shows an obvious increasing trend. However, when the SNR exceeds -32 dB, the throughput growth gradually tends to saturate. This phenomenon is mainly affected by the channel capacity limit, that is, under high SNR conditions, further improvement of signal quality has limited effect on the increase of throughput. In this scenario, the maximum throughput is 2562 kbps. Compared with Scenario 3, since the MIMO configuration is 2×2 and the layer mapping of PDSCH supports a configuration of 2 layers, the throughput in this scenario doubles, significantly improving the data transmission capacity. This performance improvement indicates that by introducing multi-antenna technology, the network can utilize spectrum resources more efficiently and thus transmit more data within the same frequency range.

[0134] Scenario 5: Transmission performance of PDSCH carrier aggregation (single layer) in the 2×1 MIMO, 5 MHz, CDL channel scenario

[0135] In Scenario 5, it is assumed that the positions of the spectrum resources of the power wireless private network resource grid occupied by the FSK signal are shown in Table 5. In this scenario, the 5GNR PDSCH carrier resource group contains 5 5GNR PDSCH resource blocks: rx5gNrBlock1, rx5gNrBlock2, rx5gNrBlock3, rx5gNrBlock4, rx5gNrBlock5. The corresponding subcarriers are spectrally distributed in the power wireless private network resource grid at the subcarrier positions corresponding to Table 4, strictly following the spectrum resource configuration requirements of the resource grid. The channel decoding performance of the PDSCH is evaluated under different SNR conditions, and 500 simulations are completed using the Monte Carlo method to verify the stability of the signal performance under the CDL channel.

[0136] Figures 18 - 22 It shows the performance of different 5GNR PDSCH resource blocks under different SNR conditions, including the change trends of throughput, successful transmission rate, and bit error rate, which deeply reflects the transmission characteristics of the system in a complex channel environment.

[0137] Figure 18 (a), 19(a), 20(a), 21(a), 22(a) depict the relationship between the successful transmission rate of different PDSCH data blocks and the SNR. It can be seen that as the signal-to-noise ratio increases, the successful transmission rate of the PDSCH gradually increases. The 5GNR PDSCH resource blocks are rx5gNrBlock1, rx5gNrBlock2, rx5gNrBlock3, rx5gNrBlock4, rx5gNrBlock5. When the SNR is below -21 dB, the successful transmission rate decreases significantly. When the SNR exceeds -21 dB, the successful transmission rate rapidly increases and approaches 100%, indicating that under low signal-to-noise ratio conditions, the signal is severely affected by noise interference, resulting in a high probability of demodulation failure. As the signal-to-noise ratio increases, the demodulation scheme proposed in the present invention can effectively cope with noise interference under medium and low signal-to-noise ratio conditions.

[0138] Figure 18 (b), 19(b), 20(b), 21(b), 22(b) further analyze the change trend of the bit error rate of different PDSCHs with the SNR. When the 5GNR PDSCH resource blocks are rx5gNrBlock1, rx5gNrBlock2, rx5gNrBlock3, rx5gNrBlock4, rx5gNrBlock5, when the SNR is below -21 dB, the bit error rate is relatively low, indicating that under this condition, the noise has a more serious impact on the received signal, and the channel equalization and demodulation scheme cannot completely eliminate the error. However, as the signal-to-noise ratio increases, the bit error rate rapidly decreases. When the SNR reaches -21 dB, the bit error rate drops to zero and remains in a zero-bit-error state thereafter.

[0139] Figure 23 shows the throughput performance of the 5G NR PDSCH carrier resource group under different SNR conditions. From Figure 23 it can be seen that as the SNR increases, the throughput shows an obvious growth trend. However, when the SNR exceeds -21 dB, the throughput growth gradually tends to saturate. This phenomenon is mainly affected by the channel capacity limit, that is, under high SNR conditions, the further improvement of signal quality has limited effect on the increase of throughput. The maximum throughput in this scenario is 3200 kbps. Since there are 5 5G NR PDSCH resource blocks in the 5G NR PDSCH carrier resource group, the peak throughput is five times that of Scenario 1.

[0140] Scenario 6: Transmission performance of PDSCH carrier aggregation (double layer) in the 2×2 MIMO, 5 MHz, CDL channel scenario

[0141] In Scenario 6, it is assumed that the positions of the spectrum resources occupied by the FSK signal in the power wireless private network resource grid are shown in Table 5. In this scenario, there are 5 5G NR PDSCH resource blocks in the 5G NR PDSCH carrier resource group: rx5gNrBlock1, rx5gNrBlock2, rx5gNrBlock3, rx5gNrBlock4, rx5gNrBlock5, and the corresponding subcarriers are distributed in the power wireless private network resource grid according to the subcarrier positions corresponding to Table 4, strictly following the spectrum resource configuration requirements of the resource grid. The channel decoding performance of PDSCH is evaluated under different SNR conditions, and 500 simulations are completed using the Monte Carlo method to verify the stability of the signal performance in the CDL channel.

[0142] Figures 24 - 28 shows the performance of different 5G NR PDSCH resource block transmissions under different SNR conditions, including the change trends of throughput success rate and bit error rate, and deeply reflects the transmission characteristics of the system in a complex channel environment.

[0143] Figure 24(a), 25(a), 26(a), 27(a), 28(a) depict the relationships of the successful transmission rates of different PDSCH data blocks varying with SNR. It can be seen that as the signal-to-noise ratio increases, the successful transmission rate of PDSCH gradually improves. The 5G NR PDSCH resource blocks are rx5gNrBlock1, rx5gNrBlock2, rx5gNrBlock3, rx5gNrBlock4, rx5gNrBlock5. When the SNR is lower than -16 dB, the successful transmission rate significantly decreases. When the SNR exceeds -16 dB, the successful transmission rate rapidly increases and approaches 100%, indicating that under low signal-to-noise ratio conditions, the signal is severely affected by noise interference, resulting in a relatively high probability of demodulation failure. As the signal-to-noise ratio increases, the demodulation scheme proposed by the present invention can effectively cope with noise interference under medium and low signal-to-noise ratio conditions. Compared with Scenario 5, since the layer mapping of PDSCH is 2 layers, the amount of data transmitted is larger, and the data stream is more vulnerable to noise and interference signals, resulting in a relatively higher signal-to-noise ratio being required for correct demodulation.

[0144] Figure 24 (b), 25(b), 26(b), 27(b), 28(b) further analyze the trends of the bit error rates of different PDSCH varying with SNR. The 5G NR PDSCH resource blocks are rx5gNrBlock1, rx5gNrBlock2, rx5gNrBlock3, rx5gNrBlock4, rx5gNrBlock5. When the SNR is lower than -16 dB, the bit error rate is relatively low, indicating that under this condition, the influence of noise on the received signal is relatively serious, and the channel equalization and demodulation scheme cannot completely eliminate errors. However, as the signal-to-noise ratio increases, the bit error rate rapidly decreases. When the SNR reaches -16 dB, the bit error rate drops to zero and remains in a zero-bit-error state thereafter. Similarly, compared with Scenario 5, since the layer mapping of PDSCH is 2 layers, the amount of data transmitted is larger, and the data stream is more vulnerable to noise and interference signals, resulting in a relatively higher signal-to-noise ratio being required for correct demodulation.

[0145] Figure 29 Shows the performance of the throughput of the 5G NR PDSCH carrier resource group under different SNR conditions. From Figure 29It can be seen that as the SNR increases, the throughput shows an obvious growth trend. However, when the SNR exceeds -16 dB, the throughput growth gradually tends to saturate. This phenomenon is mainly affected by the channel capacity limit, that is, under high SNR conditions, the further improvement of signal quality has limited effect on the increase of throughput. In this scenario, the maximum throughput is 6405 kbps. Compared with Scenario 5, since the MIMO configuration is 2×2 and the layer mapping support of PDSCH is configured for 2 layers, the throughput in this scenario doubles, significantly improving the data transmission capacity. This performance improvement indicates that by introducing multi-antenna technology, the network can utilize spectrum resources more efficiently, thus transmitting more data within the same frequency range.

[0146] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A PDSCH carrier aggregation system for a power wireless private network, characterized in that: It includes a 5GNR PDSCH resource block carrier aggregation transmission part and a 5GNR PDSCH carrier aggregation reception part; The 5GNR PDSCH resource block carrier aggregation transmission part includes a 5GNR PDSCH carrier resource group generation module and a 230MHz PDSCH resource mapping module; The module for generating 5GNR PDSCH carrier resource group processes the PDSCH data block of the transmitting end to obtain a 5GNR PDSCH modulation data block, jointly demodulates the reference signal to map the 5GNR PDSCH modulation data block to a 5GNR PDSCH resource block, and then dynamically allocates different 5GNR PDSCH resource blocks according to the configuration of the aggregated bandwidth to form a 5GNR PDSCH carrier resource group; The 230MHz PDSCH resource mapping module remaps the 5GNR PDSCH resource block in the 5GNR PDSCH carrier resource group to the power wireless private network resource grid to form a 230MHz PDSCH resource block; the 230MHz PDSCH resource block is modulated by OFDM to form power wireless private network frame data, and is transmitted through the channel; The 5GNR PDSCH carrier aggregation receiving part includes an interference filtering module, a 230MHz PDSCH resource demapping module and a 5GNR PDSCH carrier resource group demapping module; The interference filtering module is used to filter out interference subbands from the received power wireless private network frame data; The 230MHz PDSCH resource demapping module receives the filtered power wireless private network frame data, performs OFDM demodulation to obtain a 230MHz PDSCH resource block, and remaps the 230MHz PDSCH resource block to a 5GNR PDSCH carrier resource group. The 5GNR PDSCH carrier resource group includes different 5GNR PDSCH resource blocks. Different 5GNR PDSCH resource blocks are processed to obtain PDSCH data blocks.

2. The system according to claim 1, characterized in that According to the actual needs of the power wireless private network and the carrier aggregation configured in the spectrum environment, the 230MHz PDSCH resource mapping module supports three mapping modes: intra-band continuous carrier aggregation, intra-band non-continuous carrier aggregation and intra-band non-continuous hybrid carrier aggregation.

3. The system according to claim 2, characterized in that The in-band continuous carrier aggregation mapping method includes that the 5GNR PDSCH carrier resource group maps different 5GNR PDSCH resource blocks to the power wireless private network resource grid with continuous subcarriers according to the continuous subcarrier positions in the power wireless private network resource grid; The intra-band non-contiguous carrier aggregation includes: the 5GNR PDSCH carrier resource group maps different 5GNR PDSCH resource blocks to the non-contiguous subcarrier power wireless private network resource grid according to the non-contiguous subcarrier positions in the power wireless private network resource grid; The intra-band non-continuous hybrid carrier aggregation includes: the 5GNR PDSCH carrier resource group maps different 5GNR PDSCH resource blocks to the power wireless private network resource grid with continuous subcarrier parts according to the subcarrier positions that can be occupied in the power wireless private network resource grid.

4. The system according to claim 1, characterized in that When the module for generating 5GNR PDSCH carrier resource group generates a 5GNR PDSCH carrier resource group, the channel coding link of the 5GNR PDSCH carrier resource group is composed of a standard 5GNR PDSCH channel coding link.

5. The system according to claim 1, characterized in that The 5GNR PDSCH carrier aggregation receiving part also includes a timing synchronization module, a frequency synchronization module, a channel estimation and equalization module and a 5GNR PDSCH channel decoding module; these modules perform timing synchronization, frequency synchronization, channel estimation and equalization and 5GNR PDSCH channel decoding on different 5GNR PDSCH resource blocks in the 5GNR PDSCH carrier resource group, and finally process to obtain PDSCH data blocks.

6. A PDSCH carrier aggregation method for a power wireless private network, characterized in that: At the signal transmitter, the PDSCH data block is processed into a 5GNR PDSCH modulation data block through the standard 5GNR PDSCH channel coding process, and then combined with the demodulation reference signal mapping to form a 5GNR PDSCH resource block; Dynamically allocate different 5GNR PDSCH resource blocks according to the configuration of the aggregated bandwidth to form a 5GNR PDSCH carrier resource group; when the 5GNR PDSCH resource block occupies time-frequency resources, the physical resource block is used as the minimum unit, wherein each of the physical resource blocks includes a number of consecutive subcarriers; Remap the 5GNR PDSCH resource block in the 5GNR PDSCH carrier resource group to the power wireless private network resource grid in a carrier aggregation manner to form a 230MHz PDSCH resource block to adapt to the discretely distributed subcarrier resources of the power wireless private network; The 230MHz PDSCH resource block is modulated by OFDM to generate power wireless private network frame data, and transmitted through the channel; At the signal receiving end, the power wireless private network frame data is received for interference filtering and timing precision synchronization and frequency precision synchronization, and then the power wireless private network frame data OFDM is demodulated to obtain a 230MHz PDSCH resource block; According to a 5GNR PDSCH carrier resource group mapping rule of a signal transmitter, remapping the 230MHz PDSCH resource block to a 5GNR PDSCH carrier resource group, wherein the 5GNR PDSCH carrier resource group includes different 5GNR PDSCH resource blocks; Channel estimation, equalization and channel decoding are performed separately for different 5GNR PDSCH resource blocks to obtain PDSCH data blocks.

7. The method according to claim 6, characterized in that When the 5GNR PDSCH resource block is remapped to the power wireless private network resource grid, the 5GNR PDSCH resource block continuously occupies N physical resource blocks in the frequency domain and continuously occupies the same number of OFDM symbols in the time domain.

8. The method according to claim 6, characterized in that Performing precise timing synchronization and precise frequency synchronization on the power wireless private network frame data after interference filtering includes: The power wireless private network frame data after interference filtering is OFDM demodulated to obtain a 230MHz PDSCH resource block. According to the 5GNR PDSCH carrier resource group mapping rule of the signal transmitter, the 230MHz PDSCH resource block is remapped to a 5GNR PDSCH carrier resource group. The remapped 5GNR PDSCH carrier resource group includes different 5GNR PDSCH resource blocks. For different 5GNR PDSCH resource blocks, the demodulation reference signal is used to perform timing synchronization and frequency synchronization to obtain the timing offset and frequency offset corresponding to different 5GNR PDSCH resource blocks. After the average values ​​of the timing offset and the frequency offset are calculated respectively, the power wireless private network frame data is compensated.

Images