CN106535230A - VHF (Very High Frequency) wireless communication networking routing protocol design method based on OFDM (Orthogonal Frequency Division Multiplexing) technology - Google Patents
VHF (Very High Frequency) wireless communication networking routing protocol design method based on OFDM (Orthogonal Frequency Division Multiplexing) technology Download PDFInfo
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- CN106535230A CN106535230A CN201611120901.XA CN201611120901A CN106535230A CN 106535230 A CN106535230 A CN 106535230A CN 201611120901 A CN201611120901 A CN 201611120901A CN 106535230 A CN106535230 A CN 106535230A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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Abstract
The invention belongs to the technical field of wireless networking, and discloses a VHF (Very High Frequency) wireless communication networking routing protocol design method based on an OFDM (Orthogonal Frequency Division Multiplexing) technology. A networking routing protocol of VHF wireless communication adopts a specific frame format to carry out information transmission; the specific frame format comprises an information start bit, an information length bit, a sub-carrier number bit, a cyclic prefix length bit, a modulation mode bit, an error correcting code type indication bit, an information level bit, an information address bit, an information data bit, an information check bit and an information end bit; and difficulty in common networking can be reduced, networking capacity is improved, a user does not need to carry out complex protocol development and setting, and implementation cost is greatly reduced.
Description
Technical field
It is the invention belongs to Wireless Network field, more particularly to a kind of based on OFDM (Orthogonal Frequency
Division Multiplexing, OFDM) technology VHF (Very High Frequency, very high frequency(VHF)) it is wireless
Constructing communication network Routing Protocol, VHF very high frequency(VHF)s refer to radiobeam of the frequency band in 30MHz to 300MHz.
Background technology
Wireless networking is a kind of novel radio mobile radio communication, and it does not rely on the network infrastructure of any fixation, can
To regard the interim autonomous system of the multi-hop being made up of one group of mobile host with radio network interface as.
List of references《Wireless Ad Hoc network architecture is studied with Routing Protocol》In mention Ad Hoc agreements and have two kinds
Different network structures, each node of its planar structure are required for knowing the route for reaching other nodes, result in itself
Scalability it is poor；The nodal function of hierarchy is powerful, but algorithm is realized route that is complex and obtaining and is not usually
Optimization route.
List of references《Design of Routing Protocol and realization between ultra short wave Ad Hoc network net》Although the KTRP agreements of middle proposition can be with
Wireless self-networking is realized, but which makes to pass through turning for other nodes with the node of direction communication in communication process originally
Send out and could communicate, that is, generate roundabout transmission, reduce efficiency of transmission.
And list of references《Wireless self-organization network KTRP kernel tree Routing Protocol optimizing research》After proposing to improve
Although KTRP agreements solve the deficiency of this problem, but in its message transmitting procedure, transfer function is single, and information is necessary
Processed by the superlative degree, be unfavorable for multifunction of the information in transmitting procedure.
The content of the invention
The present invention provides a kind of VHF wireless communication network Design of Routing Protocol methods based on OFDM technology, can reduce
The difficulty of common networking and networking capability is improve, user is greatly dropped without the need for carry out the Routing Protocol exploitation and setting of complexity again
Low implementation cost.
For reaching above-mentioned purpose, the present invention is adopted the following technical scheme that and is achieved.
A kind of VHF wireless communication network Design of Routing Protocol methods based on OFDM technology, it is characterised in that the VHF
Wireless communication network Routing Protocol enters the transmission of row information using particular frame format；The particular frame format is included：Information starting
Position, message length position, subcarrier numerical digit, circulating prefix-length position, modulation system position, code type indicating bit, information etc.
Level, message address position, information data position, information checking position and end of message position；
Wherein, described information start bit is used for indicating the beginning of a frame of data information；
Described information length position is used for indicating a frame of data information from levels such as described informations to described information check bit
Length；
The subcarrier numerical digit is used for indicating in message transmitting procedure that the subcarrier adopted by the OFDM technology to be individual
Number；
The circulating prefix-length position is used for indicating the length of Cyclic Prefix in an OFDM symbol；
The modulation system position is used for indicating the signal modulation mode adopted by the OFDM technology；
The code type indicating bit is used for indicating the code type used in the OFDM technology；
The levels such as described information are used for indicating the equipment grade in a network for sending data message, or for indicating institute
State data message grade in a network and send the equipment of data message grade in a network；
The equipment that described information address bit is used for indicating sending data message address in a network, and the number
It is believed that the purpose equipment of breath arrival address in a network；
Described information data bit is used for indicating the specifying information that the data message is transmitted in a network；
Described information check bit is detected for the mistake to the data message in network transmission process；
Described information stop bits is used for indicating the end of a frame of data information.
The characteristics of technical solution of the present invention and further it is improved to：
(1) level such as described information includes the levels such as device levels position and data message；
The device levels position is used for indicating the equipment grade in a network for sending data message；
The levels such as the data message are used for indicating data message grade in a network, and send the data
The equipment of information grade in a network.
(2) signal modulation mode adopted by the OFDM technology is included at least：QPSK modulation, 16QAM modulation, 64QAM
Modulation.
(3) type of the error correcting code includes：The convolutional code of 2/3 code check, the convolutional code of 1/2 code check, Turbo code, LDPC
Code.
(4) equipment in network at least includes base station, relay router, terminal；
Base station device levels in a network are highest ranking；Directly receive the relaying of the information that the base station sends
Router device levels in a network are one-level transistroute, need to receive what the base station sent through n times forwarding
The relay router of information device levels in a network be N-1 level transistroutes, terminal device levels in a network
For the lowest class.
(5) when needing mutually to send data message between the equipment with identical device grade, then allow directly mutually to turn
Send out data message；
When needing mutually to send data message between the inferior grade equipment of high-grade equipment and crossgrade, it is allowed to high-grade to set
Standby direct crossgrade is to the inferior grade equipment sending data information, or the direct crossgrade of inferior grade equipment is to described high-grade
Equipment sending data information.
(6) setting of the level such as described data message is divided into both of which：
The first pattern：The levels such as the data message are not set；
Under this kind of pattern, the relay router in network is only forwarded to data message；The data that base station is sent
Information is forwarded to terminal, or the data message that terminal sends is forwarded to base station；
Second pattern：Set the levels such as the data message；
Under this kind of pattern, if the level such as data message of terminal transmission is higher than the device levels position of relay router,
By the data message, first device is forwarded the relay router upwards；
If the levels such as the data message that terminal sends are less than the device levels position of relay router, the relay router
The data message is processed accordingly, and without by the data message, first device is forwarded upwards.
The present invention provides a kind of VHF wireless communication network Design of Routing Protocol methods based on OFDM technology, and the route is assisted
View carries out Networking Design using specific frame format, including information start bit, message length position, message level position, message address
Position, information data position, information checking position and end of message position；Message level position includes device levels position and data message etc. again
Level；After using VHF network routings agreement provided by the present invention, networking capability is not only increased, and avoids common group
The high complexity of net.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the particular frame format schematic diagram that VHF wireless communication networks Routing Protocol provided in an embodiment of the present invention is adopted；
The networking mode schematic diagram that Fig. 2 is adopted by the embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
OFDM main thoughts are：Some orthogonal sub-channels are broken a channel into, high-speed data signal is converted into parallel low
Fast sub-data flow, modulates to being transmitted on each of the sub-channels.Orthogonal signalling can be divided by correlation technique in receiving terminal
Open, can so reduce interfering between subchannel.Correlation bandwidth of the signal bandwidth on per sub-channels less than channel, because
Flatness decline can be regarded as on this every sub-channels, such that it is able to eliminate intersymbol interference, and due to the band of every sub-channels
The sub-fraction of wide only former channel width, channel equalization become relatively easy.
The embodiment of the present invention provides a kind of VHF wireless communication network Design of Routing Protocol methods based on OFDM technology, institute
State the transmission that VHF wireless communication networks Routing Protocol enters row information using particular frame format；As shown in figure 1,
The particular frame format is included：Information start bit, message length position, subcarrier numerical digit, circulating prefix-length position,
Modulation system position, code type indicating bit, message level position, message address position, information data position, information checking position and letter
Breath stop bits；
Wherein, described information start bit is used for indicating the beginning of a frame of data information；
Described information length position is used for indicating a frame of data information from levels such as described informations to described information check bit
Length；
The subcarrier numerical digit is used for indicating in message transmitting procedure that the subcarrier adopted by the OFDM technology to be individual
Number；
The circulating prefix-length position is used for indicating the length of Cyclic Prefix in an OFDM symbol；
The modulation system position is used for indicating the signal modulation mode adopted by the OFDM technology；
The signal modulation mode adopted by the OFDM technology is included at least：QPSK modulation, 16QAM modulation, 64QAM are adjusted
System.
The code type indicating bit is used for indicating the code type used in the OFDM technology；
The type of the error correcting code includes：The convolutional code of 2/3 code check, the convolutional code of 1/2 code check, Turbo code, LDPC code.
The levels such as described information are used for indicating the equipment grade in a network for sending data message, or for indicating institute
State data message grade in a network and send the equipment of data message grade in a network；
The equipment that described information address bit is used for indicating sending data message address in a network, and the number
It is believed that the purpose equipment of breath arrival address in a network；
Described information data bit is used for indicating the specifying information that the data message is transmitted in a network；
Described information check bit is detected for the mistake to the data message in network transmission process；
Described information stop bits is used for indicating the end of a frame of data information.
Specifically, the level such as described information includes the levels such as device levels position and data message；
The device levels position is used for indicating the equipment grade in a network for sending data message；
The levels such as the data message are used for indicating data message grade in a network, and send the data
The equipment of information grade in a network.
Again specific, the equipment in network at least includes base station, relay router, terminal；
Base station device levels in a network are highest ranking；Directly receive the relaying of the information that the base station sends
Router device levels in a network are one-level transistroute, need to receive what the base station sent through n times forwarding
The relay router of information device levels in a network be N-1 level transistroutes, terminal device levels in a network
For the lowest class.
It should be noted that when needing mutually to send data message between the equipment with identical device grade, then can be with
Data message is mutually forwarded directly；
When needing mutually to send data message between the inferior grade equipment of high-grade equipment and crossgrade, high-grade equipment can
With direct crossgrade to the inferior grade equipment sending data information, or inferior grade equipment can directly crossgrade to the height
Grade equipment sends data message.
The above-mentioned premise with regard to crossgrade transmission between equipment is, two equipment of crossgrade geographically distance than
It is nearer.
The equipment that described information address bit is used for indicating sending data message address in a network, and the number
It is believed that the purpose equipment of breath arrival address in a network.
Also, it should be noted that the setting of the level such as described data message is divided into both of which：
The first pattern：The levels such as the data message are not set；
Under this kind of pattern, the relay router in network is only forwarded to data message；The data that base station is sent
Information is forwarded to terminal, or the data message that terminal sends is forwarded to base station；
Second pattern：Set the levels such as the data message；
Under this kind of pattern, if the level such as data message of terminal transmission is higher than the device levels position of relay router,
By the data message, first device is forwarded the relay router upwards；
If the levels such as the data message that terminal sends are less than the device levels position of relay router, the relay router
The data message is processed accordingly, and without by the data message, first device is forwarded upwards.
Described information data bit is used for indicating the specifying information that the data message is transmitted in a network；
Described information check bit is detected for the mistake to the data message in network transmission process；By one
Other positions in frame of data information calculate and obtain, for checking the correctness of a frame of data information.
Described information stop bits is used for indicating the end of a frame of data information.
Exemplary, the networking mode adopted by the embodiment of the present invention is illustrated in figure 2, end message closer to the distance can
With the interaction for directly transmitting to base station the information that completes by one-level transistroute, it is not necessarily required to through two grades of transistroutes；Away from
The interaction of complete information is transmitted to base station by two grades of transistroutes by one-level transistroute from end message farther out.
As shown in Fig. 2 the setting in levels such as data messages can divide into both of which：A kind of pattern is not differentiate between letter
The levels such as breath.Transistroute equipment only plays transmitting effect, and the transmission order of base station is passed by transistroute by base-station node all the time
Terminal unit is transported to, the commands in return of terminal unit is transmitted to base-station node by transistroute by terminal unit all the time.Send
Order is transmitted from high-grade to inferior grade, and commands in return is from inferior grade to high-grade transmission.Another kind of pattern is differentiation information etc.
Level.The function of transistroute equipment includes transmission information (transistroute function) and processing information (base station functions).If number
It is higher than the device levels of transistroute according to message level, then transistroute equipment is in transistroute function, for transmission information；
If data message grade is less than transistroute device levels, transistroute equipment is in base station functions, for processing information.
As shown in Fig. 2 a kind of situation is that network scenarios is simpler, then using the method for not differentiating between the levels such as data message.
In this case, grade is not differentiated between different information, and information is transmitted to base station by transistroute by terminal all the time,
Base station is back to terminal by transistroute after carrying out respective handling, completes the process and transmission of information.Another kind of situation is net
Network scene is more complicated, then using the method for distinguishing the levels such as data message.In this case, different data messages according to
The demand at family can set its grade level.Exemplary, more simply, the data message that need not transmit to base-station node process can be with
It is set to lower grade；It is more complicated, higher level must be could be arranged to by the information that greater degree equipment is processed.According to data
Message level position and the setting of device levels position, data message need not complete the interaction of information by transmitting to base-station node, real
The multifunction of networking is showed.The concrete treatment measures of transmission information are set by the user, different user, different scenes are to information
Process it is different.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by the scope of the claims.
Claims (7)
1. a kind of VHF wireless communication network Design of Routing Protocol methods based on OFDM technology, it is characterised in that the VHF without
Line constructing communication network Routing Protocol enters the transmission of row information using particular frame format；The particular frame format is included：Information start bit,
Message length position, subcarrier numerical digit, circulating prefix-length position, modulation system position, code type indicating bit, message level
Position, message address position, information data position, information checking position and end of message position；
Wherein, described information start bit is used for indicating the beginning of a frame of data information；
Described information length position is used for indicating a frame of data information from levels such as described informations to the length of described information check bit；
The subcarrier numerical digit is used for instruction in message transmitting procedure, the subcarrier number adopted by the OFDM technology；
The circulating prefix-length position is used for indicating the length of Cyclic Prefix in an OFDM symbol；
The modulation system position is used for indicating the signal modulation mode adopted by the OFDM technology；
The code type indicating bit is used for indicating the code type used in the OFDM technology；
The levels such as described information are used for indicating the equipment grade in a network for sending data message, or for indicating the number
It is believed that breath grade in a network and sending the equipment of data message grade in a network；
The equipment that described information address bit is used for indicating sending data message address in a network, and data letter
The purpose equipment that breath is reached address in a network；
Described information data bit is used for indicating the specifying information that the data message is transmitted in a network；
Described information check bit is detected for the mistake to the data message in network transmission process；
Described information stop bits is used for indicating the end of a frame of data information.
2. a kind of VHF wireless communication network Routing Protocols based on OFDM technology according to claim 1, its feature exist
In the level such as described information includes the levels such as device levels position and data message；
The device levels position is used for indicating the equipment grade in a network for sending data message；
The levels such as the data message are used for indicating data message grade in a network, and send the data message
Equipment grade in a network.
3. a kind of VHF wireless communication network Routing Protocols based on OFDM technology according to claim 1, its feature exist
In the signal modulation mode adopted by the OFDM technology is included at least：QPSK modulation, 16QAM modulation, 64QAM modulation.
4. a kind of VHF wireless communication network Routing Protocols based on OFDM technology according to claim 1, its feature exist
In the type of the error correcting code includes：The convolutional code of 2/3 code check, the convolutional code of 1/2 code check, Turbo code, LDPC code.
5. a kind of VHF wireless communication network Routing Protocols based on OFDM technology according to claim 1 and 2, its feature
It is that the equipment in network at least includes base station, relay router, terminal；
Base station device levels in a network are highest ranking；Directly receive the transistroute of the information that the base station sends
Device device levels in a network are one-level transistroute, need to receive the information that the base station sends through n times forwarding
Relay router device levels in a network be N-1 level transistroutes, terminal device levels in a network are for most
Inferior grade.
6. a kind of VHF wireless communication network Routing Protocols based on OFDM technology according to claim 5, its feature exist
In when needing mutually to send data message between the equipment with identical device grade, then directly mutually forwarding data are believed for permission
Breath；
When needing mutually to send data message between the inferior grade equipment of high-grade equipment and crossgrade, it is allowed to which high-grade equipment is straight
Crossgrade is connect to the inferior grade equipment sending data information, or the direct crossgrade of inferior grade equipment is to the high-grade equipment
Send data message.
7. a kind of VHF wireless communication network Routing Protocols based on OFDM technology according to claim 2, its feature exist
In the setting of the level such as described data message is divided into both of which：
The first pattern：The levels such as the data message are not set；
Under this kind of pattern, the transistroute router in network is only forwarded to data message；The data that base station is sent
Information is forwarded to terminal, or the data message that terminal sends is forwarded to base station；
Second pattern：Set the levels such as the data message；
Under this kind of pattern, if the level such as data message of terminal transmission is higher than the device levels position of transistroute router,
By the data message, first device is forwarded the transistroute router upwards；
If the levels such as the data message that terminal sends are less than the device levels position of transistroute router, the transistroute road
The data message is processed accordingly by device, and without by the data message, first device is forwarded upwards.
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| CN102811191A (en) * | 2011-05-31 | 2012-12-05 | 华为技术有限公司 | Data transmission method and device |
| CN104853385A (en) * | 2015-05-25 | 2015-08-19 | 电子科技大学 | Dynamic mechanism for efficient information transmission in WIFI system based on OFDMA technology |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070291713A1 (en) * | 2006-06-20 | 2007-12-20 | Fujitsu Limited | Communication system |
| CN101399628A (en) * | 2007-09-30 | 2009-04-01 | 大唐移动通信设备有限公司 | Transmission method and device suitable for coverage requirement in time division duplexing system |
| CN101742666A (en) * | 2008-11-07 | 2010-06-16 | 中兴通讯股份有限公司 | Multi-carrier-based method for mapping resource |
| CN102811191A (en) * | 2011-05-31 | 2012-12-05 | 华为技术有限公司 | Data transmission method and device |
| CN104853385A (en) * | 2015-05-25 | 2015-08-19 | 电子科技大学 | Dynamic mechanism for efficient information transmission in WIFI system based on OFDMA technology |
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