CN108173867A - A kind of wireless digital video transmission protocol method - Google Patents
A kind of wireless digital video transmission protocol method Download PDFInfo
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- CN108173867A CN108173867A CN201810005700.8A CN201810005700A CN108173867A CN 108173867 A CN108173867 A CN 108173867A CN 201810005700 A CN201810005700 A CN 201810005700A CN 108173867 A CN108173867 A CN 108173867A
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- layer
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- wireless
- video
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Classifications
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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
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/323—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the physical layer [OSI layer 1]
-
- 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
- H04L69/26—Special purpose or proprietary protocols or architectures
-
- 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
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC
-
- 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
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/325—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the network layer [OSI layer 3], e.g. X.25
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computing Systems (AREA)
- Mobile Radio Communication Systems (AREA)
- Communication Control (AREA)
Abstract
The present invention relates to a kind of wireless digital video transmission protocol methods, the data link layer defined in 802.11 agreements and physical layer this two layers agreement, wherein data link layer includes LLC sublaye and MAC sublayer, physical layer includes PLCP and two layers of PMD, to ensure wireless stabilized communication, when agreement enters each layer, control, management and head-tail and verification and encryption etc. can be all added compared with multi information.After being improved by above-mentioned agreement, we are equipped with omnidirectional's dual-mode antenna of 5dB, (test environment is imperial hilllock Long Cheng parks for the radio receiving transmitting module comparison actual measurement of 5G frequency point 802.11a agreements with the transmission power of 200mW, use smart 3 unmanned planes of big boundary), effect is very clear.The invention can not only reduce video requency frame data amount, but also can greatly reduce sending times, reduce the burden of limited wireless bandwidth, make the distance of transmission of video, and delay, clarity substantially improves.
Description
Technical field
The present invention relates to a kind of wireless digital video transmission protocol methods, belong to network technique field.
Background technology
Following several transmission modes are currently mainly used in the wireless transmission of high-definition digital image：
(1) satellite communication：It is transmitted, coordinated with ground launch and receiving station, feature as relaying by means of satellite
It is the operation is stable, transmission range is super remote.But the cost of superelevation and complicated hardware platform are that consumer level field is too far behind to catch up.
(2) specialized image transmits：Mainly it is transmitted using digital moving-tv transmission network, such as COFDM,
There are many its advantages of, for example the image of big data quantity is transmitted under low bandwidth, and anti-interference is extra-high etc., but shortcoming it is also obvious that its
Larger peak power and the modulation technique of self application can be very high to the requirement of the hardware design of radio-frequency receiving-transmitting, so usual equipment
It is expensive, it can not be used in ordinary consumption occasion, such as consumer level unmanned plane.
(3) public network transmits：It is transmitted by means of technologies such as GSM, CDMA, 3G, 4G (5G), its main feature is that wide coverage,
But bandwidth limits the image that can only transmit low resolution.Also its traffic fee is also limited as consumer level end product
It uses.
(4) SDR (software radio) is transmitted, and refers to realize the various Elementary Functions of radio station using software definition,
This transmission mode is suggested very early, only with the rapid development of the hardware processor performance of hardware programmable in recent years,
It was just used in recent years by heat.Such as the Lightbridge of big boundary, which is simple in structure, but the speed of service of hardware is relied on very
Height, and the software of various modulation /demodulation is developed, it is time-consuming very long, also it is not easy to the modularization of product.
(5) specialized network transmits, and is realized and transmitted by means of technologies such as WLAN, DSSS, MESH, such as wifi, this transmission
Mode is current most mainstream, and that is applied does more modes.Agreement is ripe, and using simple, there are many optional hardware plan.Introduction
Threshold is low.As 802.11 wireless protocols, it is more next to go so far as 802.11n.802.11ac modulation systems from 802.11 originally
More advanced, rate develops to 600Mbps (theoretical value) from 11Mbps originally.But the transmission mode is limited to underlying protocol
Tcp/ip modes, because being wireless network, compared to wired network, the factor being disturbed increases, so that MAC layer data re-transmitting is general
Rate is much larger.In this way to data volume itself with regard to larger, and requirement of real-time image transmitting occasion, will result in it is larger very
To the delay of interim card.Transmission range short the shortcomings that waiting users most sensitive, particularly in unmanned plane occasion, figure passes that (image passes at present
It is defeated) it is required type of the transmission range more than 500 meters, which is all kept outside of the door.But the application of the patent of invention is exactly
It makes an issue of herein.It is discussed further below.
Invention content
The purpose of the present invention is to provide one the present invention be currently：Solve general cheap wireless image transmission (figure passes)
The defects of delay of occasion and low resolution ratio, provides a kind of suitable for 802.11 that figure passes minimum two layers in ISO protocol stacks
New protocol.
To achieve these goals, technical scheme is as follows.
A kind of wireless digital video transmission protocol method, the data link layer defined in 802.11 agreements and physical layer this
Two layers of agreement, wherein data link layer include LLC sublaye and MAC sublayer, and physical layer includes PLCP and PMD two
Layer, to ensure wireless stabilized communication, when agreement enters each layer, can all add control, management and head-tail and verification with
And encryption etc. is compared with multi information.
The retransmission mechanism of network is worked out on third layer nerwork layers, to meet the fluency requirement of video, first
With formulation video data format agreement on the second layer.
It is wireless steady to ensure in 802.11 agreements in main definitions data link layer and physical layer this two layers agreement
Fixed communication, when agreement enters each layer, can all add some controls, manage, head-tail and verification and encryption etc. compared with
Multi information.These information undoubtedly bring network bandwidth very big burden, and due to the unstable factor such as wireless, cause net
The retransmission probability of network layers increases.For synthesis, in the transmission occasion of high-definition digital image, to the transmission range of video, image prolongs
When, video resolution can bring very big influence.It is because (most with point-to-point occasion, such as in nothing in image transmitting occasion
Man-machine occasion, i.e., one receives a hair), need most consideration is：The fluency of video, the clarity of video, wireless transmission distance etc.
Index is not too sensitive to the two field pictures instantaneously lost instead.It can will require to drop on the retransmission protocol of network layer
It is low, and because in the majority with point-to-point occasion, at most also equipment (such as one transmitter and four receivers) are used with regard to 3 to 5 simultaneously.
7 layers of structure of 802.11IOS models are as follows：
Layer 7:Application
Layer 6:Presentation
Layer 5:Session
Layer 4:Transport
Layer 3:Network
Layer 2:Data-Link
LLC sublayer
MAC sublayer
Layer 1:Physical
PLCP
PMD
The advantageous effect of the invention is：The agreement for simplifying data link and physical layer reformulates the repeating transmission machine of network layer
System, can not only reduce video requency frame data amount, but also can greatly reduce sending times, alleviate the burden of limited wireless bandwidth in this way,
Make the distance of transmission of video, be delayed, clarity substantially improves.The invention can not only reduce video requency frame data amount, but also can greatly reduce
Sending times reduce the burden of limited wireless bandwidth, make the distance of transmission of video, and delay, clarity substantially improves.
Specific embodiment
The specific embodiment of the present invention is described with reference to embodiment, to be better understood from the present invention.
Embodiment
Wireless digital video transmission protocol method in the present invention, data link layer and object defined in 802.11 agreements
This two layers agreement of reason layer, wherein data link layer include LLC sublaye and MAC sublayer, and physical layer includes PLCP
With two layers of PMD, to ensure wireless stabilized communication, when agreement enters each layer, control, management and head-tail can be all added
With verification and encryption etc. compared with multi information.
The retransmission mechanism of network is worked out on third layer nerwork layers, to meet the fluency requirement of video, first
With formulation video data format agreement on the second layer.
It is wireless steady to ensure in 802.11 agreements in main definitions data link layer and physical layer this two layers agreement
Fixed communication, when agreement enters each layer, can all add some controls, manage, head-tail and verification and encryption etc. compared with
Multi information.These information undoubtedly bring network bandwidth very big burden, and due to the unstable factor such as wireless, cause net
The retransmission probability of network layers increases.For synthesis, in the transmission occasion of high-definition digital image, to the transmission range of video, image prolongs
When, video resolution can bring very big influence.
Because image transmitting occasion (most with point-to-point occasion, for example in unmanned plane occasion, i.e., one receives a hair), most
It is envisaged that：The indexs such as the fluency of video, the clarity of video, wireless transmission distance, instead to instantaneously losing
One two field pictures are not too sensitive.It can will require to reduce on the retransmission protocol of network layer, and because with point-to-point
Occasion is in the majority, at most also uses equipment (such as one transmitter and four receivers) with regard to 3 to 5 simultaneously.7 layers of structure of 802.11IOS models are such as
Under：
Layer 7:Application
Layer 6:Presentation
Layer 5:Session
Layer 4:Transport
Layer 3:Network
Layer 2:Data-Link
LLC sublayer
MAC sublayer
Layer 1:Physical
PLCP
PMD
After being improved by above-mentioned agreement, we are equipped with omnidirectional's dual-mode antenna of 5dB, 5G frequencies with the transmission power of 200mW
(test environment is imperial hilllock Long Cheng parks, uses big boundary spirit 3 for the radio receiving transmitting module comparison actual measurement of point 802.11a agreements
Unmanned plane), effect is very clear.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also regard
For protection scope of the present invention.
Claims (2)
- A kind of 1. wireless digital video transmission protocol method, it is characterised in that：The data link layer defined in 802.11 agreements With this two layers agreement of physical layer, wherein data link layer includes LLC sublaye and MAC sublayer, and physical layer includes PLCP and two layers of PMD to ensure wireless stabilized communication, when agreement enters each layer, can add control, management and end to end Portion and verification and encryption etc. are compared with multi information.
- 2. wireless digital video transmission protocol method according to claim 1, it is characterised in that：In third layer nerwork The retransmission mechanism of network is worked out on layer, to meet the fluency requirement of video, video data lattice are worked out on first and second layers Formula agreement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810005700.8A CN108173867A (en) | 2018-01-03 | 2018-01-03 | A kind of wireless digital video transmission protocol method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810005700.8A CN108173867A (en) | 2018-01-03 | 2018-01-03 | A kind of wireless digital video transmission protocol method |
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| Publication Number | Publication Date |
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| CN108173867A true CN108173867A (en) | 2018-06-15 |
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| CN201810005700.8A Pending CN108173867A (en) | 2018-01-03 | 2018-01-03 | A kind of wireless digital video transmission protocol method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050138194A1 (en) * | 2003-12-23 | 2005-06-23 | Texas Instruments Incorporated | Methods and systems for multi-protocol communication |
| CN101375558A (en) * | 2006-01-27 | 2009-02-25 | Lg电子株式会社 | Network device |
| CN101502074A (en) * | 2006-08-09 | 2009-08-05 | 西门子公司 | Network for wireless data transmission |
| CN102905337A (en) * | 2012-10-15 | 2013-01-30 | 南京邮电大学 | Routing method based on cross-layer design in self-organized network |
| CN105939181A (en) * | 2015-03-06 | 2016-09-14 | 苹果公司 | Aggregated data frame structures |
-
2018
- 2018-01-03 CN CN201810005700.8A patent/CN108173867A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050138194A1 (en) * | 2003-12-23 | 2005-06-23 | Texas Instruments Incorporated | Methods and systems for multi-protocol communication |
| CN101375558A (en) * | 2006-01-27 | 2009-02-25 | Lg电子株式会社 | Network device |
| CN101502074A (en) * | 2006-08-09 | 2009-08-05 | 西门子公司 | Network for wireless data transmission |
| CN102905337A (en) * | 2012-10-15 | 2013-01-30 | 南京邮电大学 | Routing method based on cross-layer design in self-organized network |
| CN105939181A (en) * | 2015-03-06 | 2016-09-14 | 苹果公司 | Aggregated data frame structures |
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Application publication date: 20180615 |