CN108418655A - A kind of efficient HDLC base band frame packaging method - Google Patents
A kind of efficient HDLC base band frame packaging method Download PDFInfo
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- CN108418655A CN108418655A CN201810037938.9A CN201810037938A CN108418655A CN 108418655 A CN108418655 A CN 108418655A CN 201810037938 A CN201810037938 A CN 201810037938A CN 108418655 A CN108418655 A CN 108418655A
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- module
- data
- base band
- band frame
- packet
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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
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
- H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
-
- 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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Communication Control (AREA)
Abstract
The present invention relates to a kind of efficient base band frame packaging methods, eliminate address field and control field, due to having carried source address and destination address in IP packet, can remove address field and control field, improve the efficiency of information field.
Description
Technical field
The present invention relates to field of communication technology, especially point-to-point satellite communication equipment base band frame packaging method.
Background technology
HDLC (High Level DataLink Control, high-level data link layer control procedure) is Bit Oriented
The Typical Representative of data link control protocol, the agreement is independent of any type character set；Data message transparent can pass
It is defeated, it is easy to hardware realization for realizing " the 0 bit insertion " of transparent transmission；Full-duplex communication has higher data link to pass
Defeated efficiency；All frames use cyclic redundancy check (Cyclic Redundancy Check, CRC), to information frame carry out sequence volume
Number, can anti-leak-stopping receive or retransmit, transmission reliability is high；Transmission control function is detached with processing function, has larger flexibility.
Existing HDLC packaging methods are that data frame has been divided into 5 fields：Attribute field, address field, control field,
Information field, check field；Using transparent transmission, the field in addition to attribute field is used into " 0 bit insertion ", is allowed to not
Attribute field can be gone out, for recovery data packets when decapsulation.Specific encapsulation format is as follows：
| Attribute field | Address field | Control field | Information field | Check field | Attribute field |
| 8bit(0x7E) | 8bit | 8bit/16bit | 8nbit | 16bit(CRC16) | 8bit(0x7E) |
In satellite communication field, sending information Step is：Raw data packets (IP packets)->Base band frame->Mapping->Physics
Frame.When using a physical frame including only the physical frame packaged type of a base band frame, the packaging efficiency of physical frame is fixed, because
, in the case where bandwidth determines, the packaging efficiency of base band frame just directly determines the throughput of information for this.One inefficient envelope
Dress method can bring sizable transmission delay and shake into, and a kind of efficient packaging method can ensure the low time delay of information with
And low jitter, to keep video, the signals such as voice more smooth.
Invention content
The object of the present invention is in view of the shortcomings of the prior art, a kind of efficient base band frame packaging method be designed, to solve
The throughput problem of IP packet is transmitted in point-to-point communication.
The invention is realized by the following technical scheme：
A kind of efficient base band frame packaging method, which is characterized in that the encapsulation format that base band frame encapsulation uses for：
A kind of efficient base band frame packaging method, which is characterized in that include the following steps when data frame is sent：
Step 1)：8bit byte type data are converted to by single bit data using parallel serial conversion module；
Step 2)：Start to identify based on IP packets, data packet is scrambled using scrambling module PRBS31, upsets original
0,1 sequence in IP packets；
Step 3)：Module is inserted into using 0 bit, 0bit insertions are carried out to data packet, gone out outside packet header, occurs 51 continuous
It is inserted into 10；
Step 4)：Packet check (CRC) is added using CRC check module；
Step 5)：Module is inserted into using attribute field and carries out attribute field 0x7E insertions；
Step 6)：Single bit data are converted to by 4bit byte type data using serioparallel exchange module.
A kind of efficient base band frame packaging method, which is characterized in that include the following steps in data frame receipt：
Step 1)：4bit byte type data are converted to by single bit data using parallel serial conversion module；
Step 2)：Sliding detection is carried out to attribute field 0x7E using attribute field detection module；
Step 3)：CRC16 verifications are carried out using CRC check module；
Step 4)：Module is removed using 0 bit, 0bit removings are carried out to data packet, in 51 removal back of continuous appearance
0；
Step 5)：The data upset are restored using descrambling module PRBS31；
Step 6)：Single bit data are converted to by 8bit byte type data using serioparallel exchange module.
The present invention provides a kind of efficient base band frame packaging methods, compared with prior art：
1, the present invention eliminates address field and control field, due to having carried source address and purpose in IP packet
Address, therefore address field and control field can be removed, improve the efficiency of information field.
2, the present invention does not use transparent transmission, but upsets original 0,1 sequence using scrambling module before encapsulation, makes original
Beginning information 0 and 1 becomes relatively random, the probability of reduction attribute field appearance as possible, then again by the information bit after scrambling
It carries out " 0 bit insertion "；In the case where not scrambling, the efficiency that HDLC encapsulation is directly carried out to data packet is about 70% left side
The right side, after scrambling, then it is 93% or so to carry out the efficiency of HDLC encapsulation to data, substantially increases the efficiency of HDLC encapsulation.
Description of the drawings
Fig. 1 is the data frame receipt flow diagram in HDLC base band frame packaging method in the present invention.
Fig. 2 is the structural schematic diagram that HDLC base band frame packaging method receives in the present invention.
Specific implementation mode
The present invention is described further refering to attached drawing 1.
The present invention relates to a kind of efficient base band frame packaging methods, which is characterized in that the envelope that the base band frame encapsulation uses
Filling format is：
A kind of efficient base band frame packaging method, which is characterized in that include the following steps when data frame is sent：
Step 1)：8bit byte type data are converted to by single bit data using parallel serial conversion module；
Step 2)：Start to identify based on IP packets, data packet is scrambled using scrambling module PRBS31, upsets original
0,1 sequence in IP packets；
Step 3)：Module is inserted into using 0 bit, 0bit insertions are carried out to data packet, gone out outside packet header, occurs 51 continuous
It is inserted into 10；
Step 4)：Packet check (CRC) is added using CRC check module；
Step 5)：Module is inserted into using attribute field and carries out attribute field 0x7E insertions；
Step 6)：Single bit data are converted to by 4bit byte type data using serioparallel exchange module.
A kind of efficient base band frame packaging method, which is characterized in that include the following steps in data frame receipt：
Step 1)：4bit byte type data are converted to by single bit data using parallel serial conversion module；
Step 2)：Sliding detection is carried out to attribute field 0x7E using attribute field detection module；
Step 3)：CRC16 verifications are carried out using CRC check module；
Step 4)：Module is removed using 0 bit, 0bit removings are carried out to data packet, in 51 removal back of continuous appearance
0；
Step 5)：The data upset are restored using descrambling module PRBS31；
Step 6)：Single bit data are converted to by 8bit byte type data using serioparallel exchange module.
Compared with prior art, the present invention eliminates address field and control field, due to having been carried in IP packet
Source address and destination address, therefore address field and control field can be removed, improve the efficiency of information field.
The present invention does not use transparent transmission, but upsets original 0,1 sequence using scrambling module before encapsulation, makes original
Information 0 and 1 becomes relatively random, the probability that reduction attribute field as possible occurs, then by the information bit after scrambling again into
Row " 0 bit insertion "；In the case where not scrambling, the efficiency that HDLC encapsulation is directly carried out to data packet is about 70% left side
The right side, after scrambling, then it is 93% or so to carry out the efficiency of HDLC encapsulation to data, substantially increases the efficiency of HDLC encapsulation.
As described above, you can the present invention is applied.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (3)
1. a kind of efficient base band frame packaging method, which is characterized in that the encapsulation format that base band frame encapsulation uses for：
2. efficient base band frame packaging method according to claim 1, which is characterized in that the base band frame is encapsulated in data
Frame includes the following steps when sending：
Step 1)：8bit byte type data are converted to by single bit data using parallel serial conversion module；
Step 2)：Start to identify based on IP packets, data packet is scrambled using scrambling module PRBS31, upsets initial IP packet
In 0,1 sequence；
Step 3)：Module is inserted into using 0 bit, 0bit insertions are carried out to data packet, gone out outside packet header, 51 insertions 1 occurs continuous
A 0；
Step 4)：Packet check (CRC) is added using CRC check module；
Step 5)：Module is inserted into using attribute field and carries out attribute field 0x7E insertions；
Step 6)：Single bit data are converted to by 4bit byte type data using serioparallel exchange module.
3. efficient base band frame packaging method according to claim 1, which is characterized in that the base band frame is encapsulated in data
Frame includes the following steps when receiving：
Step 1)：4bit byte type data are converted to by single bit data using parallel serial conversion module；
Step 2)：Sliding detection is carried out to attribute field 0x7E using attribute field detection module；
Step 3)：CRC16 verifications are carried out using CRC check module；
Step 4)：Module is removed using 0 bit, 0bit removings are carried out to data packet, occurs the 0 of 51 removal back continuous；
Step 5)：The data upset are restored using descrambling module PRBS31；
Step 6)：Single bit data are converted to by 8bit byte type data using serioparallel exchange module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810037938.9A CN108418655A (en) | 2018-01-16 | 2018-01-16 | A kind of efficient HDLC base band frame packaging method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810037938.9A CN108418655A (en) | 2018-01-16 | 2018-01-16 | A kind of efficient HDLC base band frame packaging method |
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| CN108418655A true CN108418655A (en) | 2018-08-17 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101573902A (en) * | 2006-10-03 | 2009-11-04 | 维尔塞特公司 | Packet reformatting for downstream links |
| CN101640615A (en) * | 2009-09-08 | 2010-02-03 | 杭州华三通信技术有限公司 | Method and equipment for detecting POS port code disturbing configuration |
| US20110103300A1 (en) * | 2009-10-30 | 2011-05-05 | Nokia Corporation | Data encapsulation and service discovery over a broadcast or multicast system |
| CN102307078A (en) * | 2011-08-22 | 2012-01-04 | 株洲南车时代电气股份有限公司 | Method for realizing MVB/WTB frame data real-time decoding by utilizing oscilloscope |
| CN206272651U (en) * | 2016-11-30 | 2017-06-20 | 成都国蓉科技有限公司 | A kind of modulator for VDE systems |
-
2018
- 2018-01-16 CN CN201810037938.9A patent/CN108418655A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101573902A (en) * | 2006-10-03 | 2009-11-04 | 维尔塞特公司 | Packet reformatting for downstream links |
| CN101640615A (en) * | 2009-09-08 | 2010-02-03 | 杭州华三通信技术有限公司 | Method and equipment for detecting POS port code disturbing configuration |
| US20110103300A1 (en) * | 2009-10-30 | 2011-05-05 | Nokia Corporation | Data encapsulation and service discovery over a broadcast or multicast system |
| CN102307078A (en) * | 2011-08-22 | 2012-01-04 | 株洲南车时代电气股份有限公司 | Method for realizing MVB/WTB frame data real-time decoding by utilizing oscilloscope |
| CN206272651U (en) * | 2016-11-30 | 2017-06-20 | 成都国蓉科技有限公司 | A kind of modulator for VDE systems |
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Application publication date: 20180817 |
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