A system and method for parsing a downlink message

Abstract

The present application relates to the technical field of mobile network access, and particularly relates to a downlink message analysis system and method, which comprises a receiving module for receiving a downlink data stream; a hardware accelerator for analyzing the downlink data stream to obtain a plurality of message headers and protocol data units corresponding to the message headers; the hardware accelerator further screens wireless link control layer fragmented data from the protocol data units; the hardware accelerator writes the wireless link control layer fragmented data into a memory; and a processing module analyzes the wireless link control layer fragmented data to obtain an analysis result. The beneficial effect is that the message headers are directly analyzed in the hardware accelerator to extract corresponding protocol data units, then the fragmented data in the protocol data units are screened by the hardware accelerator and directly written into the memory for processing by the processing module, thereby reducing the processing flow of interaction with RLC software and direct memory access controllers and reducing the overall system delay.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mobile network access, in particular to a downlink message analysis system and method. BACKGROUND

[0002] In the prior art, in order to achieve better receiving efficiency, a hardware accelerator is usually used to analyze the downlink data stream. Specifically, when the downlink data stream needs to be analyzed, the hardware accelerator is used to process the downlink data stream, including Fourier transform, decoding and other processes to obtain the message header, and then the message header is output to a processing module, and the RLC software in the processing module identifies the message header to determine the type of the protocol data unit corresponding to the message header. If it is non-acknowledgment mode data or acknowledgment mode data that needs to be further processed, the software needs to trigger a direct memory access controller (DMA) to write the corresponding fragmented data into the memory, and then the RLC software processes it.

[0003] However, in actual implementation, the inventors have found that the above scheme usually needs to exchange data multiple times between the hardware accelerator, the processor, the direct memory access controller and the memory, which leads to a long and time-consuming processing flow. SUMMARY

[0004] In view of the above problems in the prior art, the present application provides a downlink message analysis system, and on the other hand, provides an analysis method suitable for the system.

[0005] The specific technical solutions are as follows:

[0006] A downlink message analysis system comprises:

[0007] A receiving module that receives a downlink data stream;

[0008] A hardware accelerator connected to the receiving module, which analyzes the downlink data stream to obtain a plurality of message headers and protocol data units corresponding to the message headers;

[0009] The hardware accelerator further screens wireless link control layer fragmented data from the protocol data units;

[0010] The wireless link control layer fragmented data includes acknowledgment mode fragmented data and non-acknowledgment mode fragmented data;

[0011] A processing module connected to a memory, the hardware accelerator writes the wireless link control layer fragmented data into the memory, and the processing module analyzes the wireless link control layer fragmented data to obtain an analysis result.

[0012] In another aspect, the hardware accelerator comprises:

[0013] a parsing module configured to acquire the downlink data stream and output according to the configuration information matched in the downlink data stream;

[0014] a data extraction module connected to the parsing module, the data extraction module configured to extract the message header and the protocol data unit corresponding to each message header from the downlink data stream according to the configuration information;

[0015] a slice copy module connected to the data extraction module, the slice copy module configured to filter the radio link control layer slice data from the protocol data unit and write the radio link layer control layer slice data into the memory.

[0016] In another aspect, the parsing module comprises:

[0017] a subframe extraction module configured to extract the data frame header of a plurality of medium access control frames from the downlink data stream;

[0018] an identification acquisition module connected to the subframe extraction module, the identification acquisition module configured to acquire the logical channel identification from the data frame header;

[0019] a configuration lookup module connected to the identification acquisition module, the configuration lookup module configured to look up the configuration information according to the logical channel identification.

[0020] In another aspect, the slice copy module comprises:

[0021] a discrimination module configured to acquire the protocol data unit and filter the radio link control layer slice data from the protocol data unit;

[0022] a memory selection module connected to the discrimination module, the memory selection module configured to select the memory address according to the memory information collected in advance;

[0023] a write-in module connected to the memory selection module, the discrimination module and the processing module respectively, the write-in module configured to write the radio link control layer slice data into the memory according to the memory address.

[0024] In another aspect, the parsing system further comprises a configuration module connected to the receiving module and the hardware accelerator respectively, the configuration module configured to generate the configuration information;

[0025] the configuration module comprises:

[0026] a message obtaining module, configured to obtain a network configuration message from the receiving module;

[0027] a logical channel parsing module, connected to the message obtaining module, and configured to generate channel attributes corresponding to a plurality of logical channels according to the network configuration message;

[0028] an information generating module, connected to the logical channel parsing module, and configured to generate the configuration information according to the channel attributes.

[0029] A method for parsing a downlink message, suitable for the parsing system, comprising:

[0030] S1: receiving a downlink data stream by using a receiving module;

[0031] S2: parsing the downlink data stream by using a hardware accelerator to obtain a plurality of message headers and protocol data units corresponding to the message headers;

[0032] S3: screening the protocol data units by using the hardware accelerator to obtain radio link control layer fragmented data;

[0033] S4: writing the radio link control layer fragmented data into a memory of a processing module by using the hardware accelerator;

[0034] S5: processing the radio link control layer fragmented data by using the processing module to obtain a parsing result.

[0035] In another aspect, the step S2 comprises:

[0036] S21: matching configuration information corresponding to the downlink data stream according to the downlink data stream;

[0037] S22: extracting message headers from the downlink data stream according to the configuration information;

[0038] S23: generating a plurality of the protocol data units according to the message headers.

[0039] In another aspect, the step S21 comprises:

[0040] S211: extracting data frame headers of a plurality of medium access control frames from the downlink data stream;

[0041] S212: obtaining logical channel identifications from the data frame headers;

[0042] Step S213: searching the configuration information according to the logical channel identifier.

[0043] On the other hand, the step S4 comprises:

[0044] Step S41: pre-acquired memory information is used to select the memory address.

[0045] Step S42: the radio link control layer fragmented data is written into the memory according to the memory address.

[0046] On the other hand, before the step S1 is executed, a configuration process is further included, which is used to generate the configuration information.

[0047] The configuration process comprises:

[0048] Step A1: obtaining the network configuration message from the receiving module.

[0049] Step A2: generating the channel attribute corresponding to multiple logical channels according to the network configuration message.

[0050] Step A3: generating the configuration information according to the channel attribute.

[0051] The above technical solution has the following advantages or beneficial effects:

[0052] In view of the relatively long fragmented data processing flow in the prior art, the present solution directly analyzes the message header in the hardware accelerator, extracts the corresponding protocol data unit, then filters the fragmented data in the protocol data unit by the hardware accelerator and directly writes it into the memory for processing by the processing module, thereby reducing the processing flow of interacting with the RLC software and the direct memory access controller and reducing the overall system delay. BRIEF DESCRIPTION OF DRAWINGS

[0053] Reference is made to the accompanying drawings to more fully describe embodiments of the present application. However, the accompanying drawings are only used for illustration and explanation, and do not constitute a limitation on the scope of the present application.

[0054] Figure 1 It is a whole schematic diagram of the embodiment of the present application.

[0055] Figure 2 It is a schematic diagram of the hardware accelerator in the embodiment of the present application.

[0056] Figure 3 It is a schematic diagram of the analysis module in the embodiment of the present application.

[0057] Figure 4 It is a schematic diagram of the fragmented copy module in the embodiment of the present application.

[0058] Figure 5 A configuration module in an embodiment of the present application;

[0059] Figure 6 A parsing method in an embodiment of the present application;

[0060] Figure 7 A sub-step of step S2 in an embodiment of the present application;

[0061] Figure 8 A sub-step of step S21 in an embodiment of the present application;

[0062] Figure 9 A sub-step of step S4 in an embodiment of the present application;

[0063] Figure 10 A configuration process in an embodiment of the present application. DETAILED DESCRIPTION

[0064] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0065] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0066] The present application will be further described below with reference to the drawings and specific embodiments, but is not limited to the present application.

[0067] The present application includes:

[0068] A parsing system of a downlink message, as shown in Figure 1 includes:

[0069] A receiving module 1 receives a downlink data stream;

[0070] A hardware accelerator 2 is connected to the receiving module 1, and the hardware accelerator 2 parses the downlink data stream to obtain a plurality of message headers and protocol data units corresponding to the message headers;

[0071] The hardware accelerator 2 further screens wireless link control layer fragmented data from the protocol data units;

[0072] The wireless link control layer fragmented data includes acknowledgment mode fragmented data and non-acknowledgment mode fragmented data;

[0073] The processing module 3 is connected to the memory 4, and the hardware accelerator 2 writes the radio link control layer fragmented data into the memory 4, and the processing module 3 analyzes the radio link control layer fragmented data to obtain an analysis result.

[0074] Specifically, to solve the problem of relatively long radio link control layer fragmented data processing flow in the prior art, the present scheme improves the hardware accelerator 2, when the receiving module 1 receives the downlink data code stream, directly analyzes the message header in the hardware accelerator 2 and extracts the corresponding protocol data unit. Then, the hardware accelerator 2 screens the radio link control layer fragmented data contained in the protocol data unit, directly writes the screened radio link control layer fragmented data into the memory for processing by the processing module 3, thereby reducing the processing flow of interacting with the RLC software and the direct memory access controller and reducing the overall system delay.

[0075] In one embodiment, as shown in FIG. 2, the hardware accelerator 2 includes: Figure 2

[0076] The analysis module 21 acquires the downlink data code stream and outputs according to the matching pre-constructed configuration information in the downlink data code stream;

[0077] The data extraction module 22 is connected to the analysis module 21, and extracts the message header from the downlink data code stream according to the configuration information, and the protocol data unit corresponding to each message header;

[0078] The fragmented copy module 23 is connected to the data extraction module 22, and screens the radio link control layer fragmented data from the protocol data unit, and writes the radio link control layer fragmented data into the memory 4.

[0079] ​Specifically, to achieve the process of directly writing the radio link control layer fragmented data into memory 4, this embodiment modifies the hardware accelerator by further configuring a fragment copy module 23 within the hardware accelerator 2. When a downlink data stream is received, the parsing module 21 matches the configuration information pre-configured according to the network based on the downlink data stream to obtain the configuration information corresponding to the current network. Subsequently, the data extraction module 22 further processes the downlink data stream according to the configuration information to obtain protocol data units corresponding to each layer, including the media access control layer, radio link control layer, packet data aggregation control layer, and service discovery application specification layer. Among them, the protocol data units of the radio link control layer may contain radio link control layer fragmented data. For this part of the protocol data units, this embodiment modifies the data extraction module 22 to extract the protocol data units while parsing the header message. Subsequently, the fragment copy module 23 writes the portion of the parsed protocol data units containing radio link control layer fragmented data into memory, thereby achieving a direct write process to memory and simplifying the original message processing and DMA hardware interaction process.

[0080] In one embodiment, such as Figure 3 As shown, the parsing module 21 includes:

[0081] Subframe extraction module 211 extracts the data frame headers of multiple media access control frames from the downlink data stream;

[0082] The identifier acquisition module 212 is connected to the subframe extraction module 211, and the identifier acquisition module 212 obtains the logical channel identifier from the data frame header.

[0083] The configuration lookup module 213 connects to the identifier acquisition module 212, and the configuration lookup module 213 searches for configuration information based on the logical channel identifier.

[0084] Specifically, to achieve the configuration information lookup process, in this embodiment, after acquiring the downlink data stream, the subframe extraction module 211 parses the downlink data stream to obtain multiple media access control (MAC) data frames. Subsequently, the data frame header is extracted from each data frame. After obtaining the data frame header, the identifier acquisition module 212 parses the data frame header to obtain the logical channel identifier (LCID). This allows the configuration lookup module 213 to find the configuration information corresponding to the logical channel based on the logical channel identifier, thus realizing the configuration information lookup process.

[0085] In one embodiment, such as Figure 4 As shown, the fragment copy module 23 includes:

[0086] The discrimination module 231 obtains a protocol data unit and screens wireless link control layer fragmented data from the protocol data unit;

[0087] The memory selection module 232 is connected to the discrimination module 231, and the memory selection module 232 selects a memory address according to pre-collected memory information.

[0088] The write module 233 is connected to the memory selection module 232, the discrimination module 231 and the processing module 3, respectively, and the write module 233 writes the wireless link control layer fragmented data into the memory according to the memory address.

[0089] Specifically, in order to solve the problem of relatively long wireless link control layer fragmented data processing flow in the prior art, in the embodiment, a fragmented copy module 23 is arranged in the hardware accelerator 2, the fragmented copy module 23 includes a discrimination module 231, which can match according to pre-configured rules to find corresponding wireless link control layer fragmented data in the protocol data unit. Then, the memory selection module 232 selects the memory position where each wireless link control layer fragmented data can be written according to pre-configured memory information including RLC memory fragmentation situation, thereby generating a corresponding memory address, and the write module 233 directly writes the memory according to the memory address, thereby replacing the process of analyzing by RLC software, triggering request by DMA hardware for writing in the prior art, and simplifying the processing flow.

[0090] In one embodiment, the analysis system further includes a configuration module 5 connected to the receiving module 1 and the hardware accelerator 2, respectively, and the configuration module 5 is used to generate configuration information.

[0091] As shown in Figure 5 The configuration module 5 includes:

[0092] The message acquisition module 51 acquires a network configuration message from the receiving module 1;

[0093] The logical channel analysis module 52 is connected to the message acquisition module 51, and the logical channel analysis module 52 generates channel attributes corresponding to a plurality of logical channels according to the network configuration message.

[0094] The information generation module 53 is connected to the logical channel analysis module 52, and the information generation module generates configuration information according to the channel attributes.

[0095] Specifically, to realize the generation of the configuration information, in the embodiment, a configuration module 5 is further arranged in the analysis system, which is capable of configuring the channel attributes of each logical channel in the hardware accelerator 2 through the obtained network configuration message, including the logical channel ID, the mode of the downlink rlc, the mode of the downlink pdcp, whether to configure the sdap header and other characteristics, and constructing the configuration information for saving in the hardware accelerator 2 for subsequent processing of the hardware accelerator.

[0096] A method for analyzing a downlink message, applicable to the analysis system as shown in Figure 6 , and comprising:

[0097] Step S1: receiving a downlink data stream by using a receiving module;

[0098] Step S2: analyzing the downlink data stream by using a hardware accelerator to obtain a plurality of message headers and protocol data units corresponding to the message headers;

[0099] Step S3: screening the protocol data units by using the hardware accelerator to obtain radio link control layer fragmented data;

[0100] Step S4: writing the radio link control layer fragmented data into the memory of a processing module by using the hardware accelerator;

[0101] Step S5: processing the radio link control layer fragmented data by using the processing module to obtain an analysis result.

[0102] Specifically, in view of the relatively long processing flow of the radio link control layer fragmented data in the prior art, the present scheme improves the hardware accelerator, when the receiving module receives the downlink data stream, directly analyzes the message headers and extracts the corresponding protocol data units in the hardware accelerator. Then, the hardware accelerator screens the radio link control layer fragmented data contained in the protocol data units, directly writes the screened radio link control layer fragmented data into the memory for processing by the processing module, thereby reducing the processing flow of interacting with the RLC software and the direct memory access controller, and reducing the overall delay of the system.

[0103] In one embodiment, as shown in Figure 7 , step S2 comprises:

[0104] Step S21: matching the configuration information corresponding to the downlink data stream according to the downlink data stream;

[0105] Step S22: extracting the message headers from the downlink data stream according to the configuration information;

[0106] Step S23: generating a plurality of protocol data units according to the message headers.

[0107] Specifically, to realize the process of writing the radio link control layer fragmented data directly into the memory 4, in the embodiment, when the downlink data code stream is received, the configuration information configured in advance according to the network is matched according to the downlink data code stream, so as to obtain the configuration information corresponding to the current network. Then, the downlink data code stream is further processed according to the configuration information, so as to obtain the protocol data units corresponding to each layer, including the medium access control layer, the radio link control layer, the packet data convergence control layer, the service discovery application specification layer and the like. The protocol data unit of the radio link control layer is the protocol data unit which may contain the radio link control layer fragmented data. For this part of the protocol data unit, in the embodiment, the data extraction module is modified to realize the extraction of the protocol data unit while the header message is parsed. Then, the part of the protocol data unit containing the radio link control layer fragmented data parsed is written into the memory, so as to realize the direct writing process of the memory and simplify the original message processing and DMA hardware interaction process.

[0108] In one embodiment, as shown in FIG. 4, step S21 includes: Figure 8

[0109] Step S211: extracting the data frame header of the plurality of medium access control frames from the downlink data code stream;

[0110] Step S212: obtaining the logical channel identifier from the data frame header;

[0111] Step S213: searching the configuration information according to the logical channel identifier.

[0112] Specifically, to realize the searching process of the configuration information, in the embodiment, after the downlink data code stream is obtained, the data frames of the plurality of medium access control frames are obtained by parsing the downlink data code stream, and then the data frame header of each data frame is extracted. After the data frame header is extracted, the data frame header is further parsed to obtain the logical channel identifier (lcid), and then the configuration information corresponding to the logical channel is searched according to the logical channel identifier, so as to realize the searching process of the configuration information.

[0113] In one embodiment, as shown in FIG. 6, step S4 includes: Figure 9

[0114] Step S41: obtaining the memory address by selecting the memory according to the pre-acquired memory information;

[0115] Step S42: writing the radio link control layer fragmented data into the memory according to the memory address.

[0116] ​​Specifically, in order to solve the problem that the wireless link control layer fragmentation data processing procedure in the prior art is relatively long, when the protocol data unit is searched, the rule is matched, and the wireless link control layer fragmentation data is obtained, according to the pre-configured memory information, including the RLC memory fragmentation condition, the memory position where each wireless link control layer fragmentation data can be written is selected, the corresponding memory address is generated, and the memory is written according to the memory address, so as to replace the process that the RLC software is parsed, the request is triggered, and the DMA hardware is written in the prior art, and the processing procedure is simplified.

[0117] In one embodiment, before step S1 is performed, a configuration process is further included, and the configuration process is used for generating configuration information.

[0118] As shown in Figure 10 , the configuration process includes:

[0119] Step A1: obtaining a network configuration message from a receiving module;

[0120] Step A2: generating channel attributes corresponding to a plurality of logical channels according to the network configuration message;

[0121] Step A3: generating configuration information according to the channel attributes.

[0122] Specifically, in order to realize the generation of the configuration information, the configuration process is further set before actual parsing in the embodiment, and the channel attributes of each logical channel in the hardware accelerator are configured through the obtained network configuration message in the configuration process, including the logical channel ID, the mode of the downlink RLC, the mode of the downlink PDCP, whether the SDAP header is configured, and other characteristics, and the configuration information is constructed and saved in the hardware accelerator, which is used for subsequent processing of the hardware accelerator.

[0123] The above is only the preferred embodiment of the present application, and does not limit the implementation and protection scope of the present application. For those skilled in the art, it should be realized that any equivalent replacement and obvious change made according to the content of the present application should be included in the protection scope of the present application.

Claims

1. A system for parsing a downlink message, the system comprising: The application relates to a system and method for parsing downlink data code streams. The system comprises: a receiving module for receiving a downlink data code stream; a hardware accelerator connected to the receiving module, the hardware accelerator parsing the downlink data code stream to obtain a plurality of message headers and protocol data units corresponding to the message headers; the hardware accelerator further screening wireless link control layer fragmented data from the protocol data units; the wireless link control layer fragmented data comprising acknowledgement mode fragmented data and non-acknowledgement mode fragmented data; a processing module connected to a memory, the hardware accelerator writing the wireless link control layer fragmented data into the memory, and the processing module parsing the wireless link control layer fragmented data to obtain a parsing result. The hardware accelerator comprises: a parsing module for obtaining the downlink data code stream and outputting according to matching pre-constructed configuration information in the downlink data code stream; a data extraction module connected to the parsing module, the data extraction module extracting the message headers and protocol data units corresponding to each message header from the downlink data code stream according to the configuration information; a fragmented copy module connected to the data extraction module, the fragmented copy module screening the wireless link control layer fragmented data from the protocol data units and writing the wireless link control layer fragmented data into the memory; the fragmented copy module comprises: a discrimination module for obtaining the protocol data units and screening the wireless link control layer fragmented data from the protocol data units; a memory selection module connected to the discrimination module, the memory selection module selecting a memory address according to pre-collected memory information; a writing module connected to the memory selection module, the discrimination module and the processing module respectively, the writing module writing the wireless link control layer fragmented data into the memory according to the memory address; the discrimination module searching for corresponding wireless link control layer fragmented data according to pre-configured rules; 2. The resolution system of claim 1, wherein, the memory selection module selecting a memory position where each wireless link control layer fragmented data can be written according to RLC memory fragmentation conditions, thereby generating a corresponding memory address. The parsing module comprises: a subframe extraction module for extracting data frame headers of a plurality of medium access control frames from the downlink data code stream; an identification acquisition module connected to the subframe extraction module, the identification acquisition module acquiring a logical channel identification from the data frame headers; 3. The resolution system of claim 2, wherein, a configuration search module connected to the identification acquisition module, the configuration search module searching the configuration information according to the logical channel identification. The parsing system further comprises a configuration module connected to the receiving module and the hardware accelerator respectively, the configuration module being used for generating the configuration information; the configuration module comprises: a message acquisition module for acquiring a network configuration message from the receiving module; a rule acquisition module connected to the message acquisition module, the rule acquisition module acquiring a rule from the network configuration message; a rule storage module connected to the rule acquisition module, the rule storage module storing the rule; a rule search module connected to the rule storage module, the rule search module searching the rule according to the logical channel identification; and a rule output module connected to the rule search module, the rule output module outputting the configuration information according to the rule. A logical channel parsing module connected to the message obtaining module, the logical channel parsing module generates channel attributes corresponding to a plurality of logical channels according to the network configuration message; An information generating module connected to the logical channel parsing module, the information generating module generates the configuration information according to the channel attributes.

4. A method for parsing a downlink message, the method comprising: The parsing system suitable for any one of claims 1-3, comprising: Step S1: receiving a downlink data stream by using a receiving module; Step S2: parsing the downlink data stream by using a hardware accelerator to obtain a plurality of message headers and protocol data units corresponding to the message headers; Step S3: screening the protocol data units by using the hardware accelerator to obtain radio link control layer fragmented data; Step S4: writing the radio link control layer fragmented data into the memory of a processing module by using the hardware accelerator; Step S5: processing the radio link control layer fragmented data by using the processing module to obtain a parsing result.

5. The resolution method according to claim 4, wherein, The step S2 comprises: Step S21: matching configuration information corresponding to the downlink data stream according to the downlink data stream; Step S22: extracting message headers from the downlink data stream according to the configuration information; Step S23: generating a plurality of protocol data units according to the message headers.

6. The resolution method according to claim 5, wherein, The step S21 comprises: Step S211: extracting data frame headers of a plurality of medium access control frames from the downlink data stream; Step S212: obtaining logical channel identifiers from the data frame headers; Step S213: searching the configuration information according to the logical channel identifiers.

7. The resolution method according to claim 5, wherein, The step S4 comprises: Step S41: selecting a memory address by using pre-collected memory information to select the memory; Step S42: writing the radio link control layer fragmented data into the memory according to the memory address.

8. The resolution method according to claim 5, wherein, Before executing step S1, a configuration process is further included, the configuration process is used for generating the configuration information; The configuration process comprises: Step A1: obtaining a network configuration message from the receiving module; Step A2: generating channel attributes corresponding to a plurality of logical channels according to the network configuration message; Step A3: generating the configuration information according to the channel attributes.

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