CN115276903A - Method for improving LTE air interface transmission efficiency - Google Patents
Method for improving LTE air interface transmission efficiency Download PDFInfo
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- CN115276903A CN115276903A CN202210735461.8A CN202210735461A CN115276903A CN 115276903 A CN115276903 A CN 115276903A CN 202210735461 A CN202210735461 A CN 202210735461A CN 115276903 A CN115276903 A CN 115276903A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000005540 biological transmission Effects 0.000 title claims abstract description 25
- 238000007906 compression Methods 0.000 claims abstract description 38
- 230000006835 compression Effects 0.000 claims abstract description 38
- 230000006837 decompression Effects 0.000 claims abstract description 19
- 238000013144 data compression Methods 0.000 claims abstract description 17
- 238000004364 calculation method Methods 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/04—Protocols for data compression, e.g. ROHC
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
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Abstract
The invention discloses a method for improving the transmission efficiency of an LTE air interface. The method comprises the following steps: step 1, setting a global sequence number Next _ PDCP _ TX _ SN as 0, step 2, processing data transmission by a data transmitting party, and step 3, processing data reception by a data receiving party; the method has the advantages that by using a data compression technology, when the LTE sends air interface data, the application layer data of the message is compressed by a data compression method disclosed by 7Z LZMA on a PDCP protocol layer, an identification bit is added at the head of the PDCP, and the application layer data of the message is decompressed by the same data decompression method on the PDCP layer of the LTE receiver; after ROHC head compression is carried out, application layer data can be further compressed, more than 10% of data volume can be recompressed on the basis of original head compression, particularly for webpage and text data, more than 50% of data volume can be reduced, air interface transmission data volume is effectively reduced, and transmission efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of wireless transmission compression, and particularly relates to a method for improving LTE air interface transmission efficiency.
Background
The existing LTE wireless transmission compression technology is used for performing alternative compression on a data message header. And these header compression methods replace the message header with a small amount of information to achieve the purpose of improving transmission efficiency, but this can only process the data message header and has limited compression efficiency.
Patent application No. 201811573994.0 discloses a data transmission method and a communication device, and the method comprises the following steps: the method comprises the steps that network equipment sends first information to terminal equipment, wherein the first information is used for indicating Transport Block Size (TBS) configuration information and/or Redundancy Version (RV) configuration information, the TBS configuration information is used for configuring a first TBS, and the RV configuration information is used for configuring first RV information; the network equipment receives the transmission block from the terminal equipment and sends the transmission block to the terminal equipment; wherein the TBS of the transport block is the first TBS, and the RV information of the transport block is the first RV information. The network device may extend the TBS and/or refine the RV through the TBS configuration information and/or the RV configuration information, so that the network device and the terminal device may perform TB transmission by using the extended TBS and/or refine the RV.
For the content of the data message, such as the application layer data of the web page data and the text data, the existing compression mode of the LTE does not relate to the content. The ROHC header compression technology defined in the 3GPP protocol 36.323 compresses the IP/UDP/TCP message header; for example, for an IP/UDP message with 1500 bytes, the ROHC scheme can compress the header of the IP and UDP messages with 28 bytes to about 3 bytes, which reduces 25 bytes, and after compression, the whole message still has 1475 bytes, which only reduces 1.7% of data amount; for 1500 bytes of IP/TCP messages, the header of 40 bytes of IP and TCP messages can be compressed to about 5 bytes at most, 35 bytes are reduced, 1465 bytes of the whole message are remained, and only 2.3% of data amount is reduced, so that the whole compression efficiency is very limited.
Disclosure of Invention
The present invention aims to provide a method for improving the transmission efficiency of an LTE air interface, which can overcome the above technical problems,
the method comprises the following steps:
step 1, setting a global sequence number Next _ PDCP _ TX _ SN to 0;
step 2, the data sending party processes the sending data:
step 2.1, the application layer data reaches PDCP, and the global sequence number Next _ PDCP _ TX _ SN is used as the only sequence number PDCP-SN of the current message; the global sequence number Next _ PDCP _ TX _ SN is automatically increased by 1;
2.2, inputting the data body and the data length of the application layer into an application layer compression module for compression processing of the application data, and returning the content and the length of the compressed data block after the compression processing of the application layer data is finished;
step 2.3, according to the header compression configuration of the high level, the IP/UDP/TCP header of the message is compressed, the space occupied by the IP/UDP/TCP message header is reduced, so as to save the empty radio resource and improve the transmission efficiency;
step 2.4, calculating the integrity protection result of the message data according to the integrity protection algorithm and the integrity protection key configured by the high layer, the PDCP-SN and the PDCP message data block, and attaching the integrity protection result to the tail part of the data message;
step 2.5, carrying out encryption calculation on the message data according to the encryption algorithm and the encryption key configured by the high layer and the message data blocks of the PDCP-SN and the PDCP, and taking the encrypted message data block as new PDCP message data;
step 2.6, constructing a PDCP message header according to the information of the PDCP-SN length configured by the high layer, filling the PDCP header with the message sequence number PDCP-SN in the step 2.1, setting the compression mark of the application layer data to be 1, indicating that the application layer data is compressed, and using the compressed application layer data after the decompression by a receiving end;
step 2.7, sending the PDCP PDU generated in the above step to an RLC protocol layer;
step 3, the data receiver processes the received data:
step 3.1, acquiring and storing PDCP PDU message sent by the opposite terminal from the RLC protocol layer;
step 3.2, acquiring a PDCP message sequence number PDCP-SN and an application layer data compression mark from the head of the PDCP message;
step 3.3, according to the encryption algorithm and encryption key configured by the high layer, the message PDCP-SN and the message data block, carrying out decryption calculation on the message data and processing the decrypted message data block as new PDCP message data;
step 3.4, calculating an integrity protection result of the message data according to an integrity protection algorithm and an integrity protection key configured by a high layer, PDCP-SN and PDCP message data block, comparing the integrity protection result obtained by calculation with the integrity protection result carried by the tail part of the PDCP message, if the inconsistency check fails, indicating that the message is tampered in the transmission process, discarding the PDCP message data, and if the integrity protection result obtained by calculation is completely consistent with the integrity protection result carried by the tail part of the PDCP message, successfully checking, and continuing the following steps;
step 3.5, according to the header compression configuration of the high layer, decompressing and restoring the IP/UDP/TCP header of the message, replacing the message content before restoration with the restored IP/UDP/TCP header content to form a new PDCP message;
step 3.6, when the application layer data compression flag in step 3.2 is 1, inputting the data and data length after application layer compression into an application layer decompression module for decompression processing, returning a new application layer data block and data block length after decompression processing, and performing subsequent processing by taking the new application layer data block as received message data;
and 3.7, restoring the complete data message and sending the application layer data to the application layer.
The method has the following advantages:
1. the method of the invention utilizes a data compression technology, when the LTE sends air interface data, the application layer data of the message is compressed by a data compression method disclosed by 7Z LZMA on a PDCP protocol layer, an identification bit is added at the head of the PDCP, and the application layer data of the message is decompressed by the same data decompression method on the PDCP layer of the LTE receiver;
2. after ROHC head compression is carried out, the method can further compress the application layer data, and can recompress more than 10% of data volume on the basis of the original head compression, particularly reduce more than 50% of data volume for webpage and text data, effectively reduce air interface transmission data volume and improve transmission efficiency;
2. the method of the invention can compress the data wirelessly transmitted by LTE so as to improve the transmission efficiency.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below with reference to the accompanying drawings. As shown in figure 1 of the drawings, in which,
the method comprises the following steps:
step 1, setting a global sequence number Next _ PDCP _ TX _ SN to 0;
step 2, the data sending party processes the sending data:
step 2.1, the application layer data reaches PDCP, and the global sequence number Next _ PDCP _ TX _ SN is used as the only sequence number PDCP-SN of the current message; the global sequence number Next _ PDCP _ TX _ SN is automatically increased by 1;
2.2, inputting the data body and the data length of the application layer into an application layer compression module for compression processing of the application data, and returning the content and the length of the compressed data block after the compression processing of the application layer data is finished;
step 2.3, according to the header compression configuration of the high layer, the IP/UDP/TCP header of the message is compressed, and the space occupied by the IP/UDP/TCP message header is reduced so as to save the empty wireless resource and improve the transmission efficiency;
step 2.4, calculating the integrity protection result of the message data according to the integrity protection algorithm and the integrity protection key configured by the high layer, the PDCP-SN and the PDCP message data block, and attaching the integrity protection result to the tail part of the data message;
step 2.5, carrying out encryption calculation on the message data according to the encryption algorithm and the encryption key configured by the high layer and the message data blocks of the PDCP-SN and the PDCP, and taking the encrypted message data block as new PDCP message data;
step 2.6, constructing a PDCP message header according to the information of the PDCP-SN length configured by the high layer, filling the PDCP header with the message sequence number PDCP-SN in the step 2.1, setting the compression mark of the application layer data to be 1, indicating that the application layer data is compressed, and using the compressed application layer data after the decompression by a receiving end;
step 2.7, sending the PDCP PDU generated in the above step to an RLC protocol layer;
step 3, the data receiving party processes the received data:
step 3.1, acquiring and storing PDCP PDU message sent by the opposite terminal from the RLC protocol layer;
step 3.2, acquiring a PDCP message sequence number PDCP-SN and an application layer data compression mark from the head of the PDCP message;
step 3.3, according to the encryption algorithm and encryption key configured by the high layer, the message PDCP-SN and the message data block, carrying out decryption calculation on the message data and processing the decrypted message data block as new PDCP message data;
step 3.4, calculating an integrity protection result of the message data according to an integrity protection algorithm and an integrity protection key configured by a high layer, PDCP-SN and PDCP message data block, comparing the integrity protection result obtained by calculation with the integrity protection result carried by the tail part of the PDCP message, if the inconsistency check fails, indicating that the message is tampered in the transmission process, discarding the PDCP message data, and if the integrity protection result obtained by calculation is completely consistent with the integrity protection result carried by the tail part of the PDCP message, successfully checking, and continuing the following steps;
step 3.5, according to the header compression configuration of the high layer, decompressing and restoring the IP/UDP/TCP header of the message, replacing the message content before restoration with the restored IP/UDP/TCP header content to form a new PDCP message;
step 3.6, when the application layer data compression flag in step 3.2 is 1, inputting the data and data length after application layer compression into an application layer decompression module for decompression processing, returning a new application layer data block and data block length after decompression processing, and performing subsequent processing by taking the new application layer data block as received message data;
and 3.7, restoring the complete data message and sending the application layer data to the application layer.
In a specific embodiment, a header format of a 3gpp 36323 protocol PDCP layer is modified, and when a sequence number of the PDCP layer is 12 bits, a second reserved bit of the PDCP header is modified to an application layer data compression flag bit a, when a =0, it indicates that the packet is not subjected to application layer data compression, and when a =1, it indicates that the packet is subjected to application layer data compression.
The implementation of the application layer compression specifically comprises the following steps:
step 101, judging the length of a PDCP sequence number configured by a high layer, when the length of the PDCP sequence number is 12 bits, starting an application layer compression function, setting a compression mark of a PDCP head application layer data to be 1, and continuing the next processing; when the length of the PDCP serial number is not 12 bits, setting the compression flag of the application layer data at the head of the PDCP to be 0, returning the input length and content of the original application layer data block, and finishing the processing;
step 102, inputting the length of an application layer data block and the content of the data block;
103, compressing the application layer data block by a public 7Z LZMA data compression algorithm;
step 104, returning the length of the new data block and the content of the new data after compression processing;
the implementation of application layer decompression specifically comprises the following steps:
step 201, judging an application layer data compression identification bit of the PDCP header, and if the compression identification bit is 0, performing application layer decompression flow processing, and returning original data content and original data length; if the value is 1, continuing the next step of processing;
step 202, inputting the length and content of data to be decompressed;
step 203, carrying out application layer data decompression processing through a 7Z LZMA data decompression algorithm;
and step 204, returning the length of the new data and the content of the new data after decompression.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the present disclosure should be covered within the scope of the present invention claimed.
Claims (3)
1. A method for improving LTE air interface transmission efficiency is characterized by comprising the following steps:
step 1, setting a global sequence number Next _ PDCP _ TX _ SN to 0;
step 2, the data sender processes the sending data;
and 3, the data receiving party processes the received data.
2. The method according to claim 1, wherein the step 2 includes the following steps:
step 2.1, the application layer data reaches PDCP, and the global sequence number Next _ PDCP _ TX _ SN is used as the only sequence number PDCP-SN of the current message; the global sequence number Next _ PDCP _ TX _ SN is automatically increased by 1;
step 2.2, inputting the application layer data body and the application layer data length into an application layer compression module for application data compression processing, and returning the content and the length of the compressed data block after the application layer data compression processing is finished;
step 2.3, according to the header compression configuration of the high layer, the IP/UDP/TCP header of the message is compressed, and the space occupied by the IP/UDP/TCP message header is reduced so as to save the empty wireless resource and improve the transmission efficiency;
step 2.4, calculating the integrity protection result of the message data according to the integrity protection algorithm and the integrity protection key configured by the high layer, the PDCP-SN and the PDCP message data block, and attaching the integrity protection result to the tail part of the data message;
step 2.5, carrying out encryption calculation on the message data according to the encryption algorithm and the encryption key configured by the high layer and the message data blocks of the PDCP-SN and the PDCP, and taking the encrypted message data block as new PDCP message data;
step 2.6, constructing a PDCP message header according to the information of the PDCP-SN length configured by the high layer, filling the PDCP header with the message sequence number PDCP-SN in the step 2.1, setting the compression mark of the application layer data to be 1, indicating that the application layer data is compressed, and using the compressed application layer data after the decompression by a receiving end;
and 2.7, transmitting the PDCP PDU generated in the step to an RLC protocol layer.
3. The method according to claim 1, wherein the step 3 includes the following steps:
step 3.1, acquiring and storing PDCP PDU message sent by the opposite terminal from the RLC protocol layer;
step 3.2, acquiring a PDCP message sequence number PDCP-SN and an application layer data compression mark from the head of the PDCP message;
step 3.3, according to the encryption algorithm and encryption key configured by the high layer, the message PDCP-SN and the message data block, carrying out decryption calculation on the message data and processing the decrypted message data block as new PDCP message data;
step 3.4, calculating an integrity protection result of the message data according to an integrity protection algorithm and an integrity protection key configured by a high layer, PDCP-SN and PDCP message data blocks, comparing the integrity protection result obtained by calculation with an integrity protection result carried by the tail part of the PDCP message, when the inconsistency check fails, indicating that the message is tampered in the transmission process, discarding the PDCP message data, when the integrity protection result obtained by calculation is completely consistent with the integrity protection result carried by the tail part of the PDCP message, successfully checking, and continuing the following steps;
step 3.5, according to the header compression configuration of the high layer, decompressing and restoring the IP/UDP/TCP header of the message, replacing the message content before restoration with the restored IP/UDP/TCP header content to form a new PDCP message;
step 3.6, when the application layer data compression flag in step 3.2 is 1, inputting the data and data length after application layer compression into an application layer decompression module for decompression processing, returning a new application layer data block and data block length after decompression processing, and performing subsequent processing by taking the new application layer data block as received message data;
and 3.7, restoring the complete data message and sending the application layer data to the application layer.
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| CN108200091A (en) * | 2013-01-17 | 2018-06-22 | 华为技术有限公司 | A kind of data package processing method and device |
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