CN103716092B - The communication means of the group network system of bidirectional optical fiber communication in a kind of bus-network - Google Patents
The communication means of the group network system of bidirectional optical fiber communication in a kind of bus-network Download PDFInfo
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- CN103716092B CN103716092B CN201310712612.9A CN201310712612A CN103716092B CN 103716092 B CN103716092 B CN 103716092B CN 201310712612 A CN201310712612 A CN 201310712612A CN 103716092 B CN103716092 B CN 103716092B
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Abstract
The group network system of bidirectional optical fiber communication and communication means in a kind of bus-network, group network system has the slave computer of host computer and more than 1, host computer connects the uplink optical fibers for communicating with slave computer and downlink optical fiber respectively by light near-end machine, and the slave computer of more than 1 connects the uplink optical fibers and downlink optical fiber that are used for communicating with host computer respectively each via a light remote termination.Communication means, host computer and all slave computers are communicated by self-defining communication protocol frame format, and communication protocol frame format includes: frame head synchronization character；Receive the numbering of unit；Data type；Data length；Data.Present invention achieves the intercommunication mutually between multiple spot, use self-defining communication protocol to avoid use CSMA/CD technology, ICP/IP protocol in simple fiber communication network, significantly reduce cost and significantly reduce its complexity.The present invention is applicable to fiber optic communication between fairly simple multiple spot, it is achieved that efficient networking mode flexibly.
Description
Technical field
The present invention relates to a kind of network service.Particularly relate to a kind of set up a kind of basic bus-network topological structure by the two-way communication between optical transmitter and receiver, utilize self-defining communication protocol to realize the communication means of the group network system of bidirectional optical fiber communication in the bus-network of digital signal transmitted in both directions in a fiber.
Background technology
Fiber optic communication is the prevailing transmission means of modern communication networks, and modern communications plays very important effect.Under different application scenarios, it is necessary to select different optical fiber networking technologys.Such as point-to-point communication has, between being applicable at 2, the occasion stablizing big business, and bus-network is applicable not only to there is the occasion stablizing big business between 2, applies also for the occasion having frequent business upper and lower on the way.Therefore, it is critically important for selecting suitable networking technology in actual application scenario.Networking technology is mainly in view of the factors such as network structure, communication protocol, device type, volume of business.Optical fiber networking structure is relatively more flexible, and in modern Networks of Fiber Communications, common communication mode is point-to-point communication, and this networking mode is fairly simple, and the problem being absent between communication end point accessing share medium conflict.To realize the communication between multiple spot, then the problem that have to solve the conflict of multiple communication end point share medium.Fiber optic communication between multiple spot can set up specific network, make the communication protocol that whole Web vector graphic is identical, the Ethernet set up in such as computer network, whole Ethernet uses TCP/IP, NETBEUI or IPX/SPX communication protocol, the problem that CSMA/CD (csma and the collision detection) technology that Ethernet uses can be effectively prevented from share medium conflict, the ICP/IP protocol used can be effectively realized the intercommunication mutually between multiple spot, but this kind of method should be used for saying for some fairly simple fiber optic communication, add complexity and the cost of system.
Summary of the invention
The technical problem to be solved is to provide and a kind of uses self-defining Networking protocol to the communication means of the group network system of bidirectional optical fiber communication in the bus-network realize the fiber optic communication between multiple spot.
The technical solution adopted in the present invention is: the communication means of the group network system of bidirectional optical fiber communication in a kind of bus-network, the group network system of bidirectional optical fiber communication in bus-network, include the slave computer of host computer and more than 1, described host computer connects the uplink optical fibers for communicating with slave computer and downlink optical fiber respectively by light near-end machine, the slave computer of described more than 1 connects the uplink optical fibers and downlink optical fiber that are used for communicating with host computer respectively each via a light remote termination, host computer and all slave computers are communicated by self-defining communication protocol frame format, described communication protocol frame format includes: frame head synchronization character, for identifying the initial of frame；Receive the numbering of unit, for reception element address is configured, require to be configured to reception element number broadcast address, multicast address and point-to-point communication address according to different application；Data type, is what kind of data for what transmission was described；Data length, for illustrating the length of actually active data；Data, are the contents to transmit of actually active data；
The communication mode of host computer comprises the steps:
1) equipment initializes:
2) address configuration, sets a unique numbering to host computer；
3) host computer broadcasting digital information is to slave computer, and enters waiting state；
4) judge whether in the wait state to receive the instruction that host computer needs to communicate with certain slave computer, be enter next step, otherwise still in waiting state；
5) transmission is set up connection packet and waits slave computer response；
6) if not receiving the reply data bag of slave computer in the count value of regulation, then step 8 is entered), if receiving the reply data bag of slave computer, then enter step 7)；
7) communicate with slave computer, and produce sign off packet or accept the sign off packet of slave computer；
8) sign off, return step 3) waiting state in.
Described data type includes common digital of digital video data and common digital audio-frequency data, or status poll value and control command.
Step 6) described in count value refer in enumerator set host computer sent the number of times setting up connection packet.
Step 6) in also include when host computer sends that slave computer is not replied after packet, Counter Value subtracts 1.
The communication mode of slave computer comprises the steps:
1) equipment initializes:
2) address configuration, sets a unique numbering to each slave computer；
3) receive the digital information of host computer broadcast, and enter waiting state；
4) judge whether to receive that host computer sends sets up connection packet in the wait state, be enter next step, otherwise return step 3) waiting state；
5) send foundation and connection reply packet to host computer；
6) communicate with host computer, and produce sign off packet or accept the sign off packet of host computer；
7) sign off, return step 3) waiting state.
The communication means of the group network system of bidirectional optical fiber communication in a kind of bus-network of the present invention, utilizes the two-way communication between optical transmitter and receiver and self-defining communication protocol to set up a kind of bus-type network structure.The problem efficiently solving the conflict of multiple communication end point share medium, achieve the intercommunication mutually between multiple spot, use self-defining communication protocol to avoid simultaneously and simple fiber communication network uses the shortcomings such as the complexity such as CSMA/CD technology, ICP/IP protocol, expense is big, cost is high.The present invention is applicable to fiber optic communication between fairly simple multiple spot, it is achieved that efficient networking mode flexibly, significantly reduces cost and significantly reduces its complexity.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention；
Fig. 2 is the communication protocol frame format schematic diagram of the present invention；
Fig. 3 is the workflow diagram of host computer in the present invention；
Fig. 4 is the workflow diagram of slave computer in the present invention.
In figure
1: host computer 2: light near-end machine
3: downlink optical fiber 4: uplink optical fibers
5: light remote termination 6: slave computer
21: the first PLD 22: the first optical modules
51: the second PLD 52: the second optical modules
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, in a kind of bus-network to the present invention, the communication means of the group network system of bidirectional optical fiber communication is described in detail.
The group network system of bidirectional optical fiber communication in a kind of bus-network of the present invention, the communication equipment related to is mainly optical transmitter and receiver and optical fiber, and whole system realizes two-way communication by setting up to be bi-directionally connected between optical transmitter and receiver.Whole system adopts the network topology structure of bus-type, is made up of host computer and multiple slave computer, is divided into up-link and downlink.
As shown in Figure 1, the group network system of bidirectional optical fiber communication in a kind of bus-network of the present invention, include host computer 1 and slave computer 6, described host computer 1 connects the uplink optical fibers 4 being used for communicating with slave computer 6 and downlink optical fiber 3 respectively by light near-end machine 2, and described slave computer 6 connects the uplink optical fibers 4 being used for communicating with host computer and downlink optical fiber 3 respectively by light remote termination 5.Uplink optical fibers 4 described here constitutes up-link, and downlink optical fiber 3 constitutes downlink.
Described light near-end machine 2 includes the first PLD 21 and the first optical module 22 electrically connected with the first PLD 21, wherein, the first described PLD 21 electrically connects host computer 1, and the first described optical module 22 connects uplink optical fibers 4 and downlink optical fiber 3 respectively.
Described light remote termination 5 includes the second PLD 51 and the second optical module 52 electrically connected with the second PLD 51, wherein, the second described PLD 51 electrically connects slave computer 6, and the second described optical module 52 connects uplink optical fibers 4 and downlink optical fiber 3 respectively.
In the present invention, the first described PLD 21 is identical with the second PLD 51 structure, every PLD being provided that LVDS interface can adopt, wherein, LVDS, i.e. LowVoltageDifferentialSignaling, it it is a kind of Low Voltage Differential Signal, such as the logical device that model can be selected to be CycloneIIIEP3C10E144C7, or selection model is the logical device of StratixIIEP2S130F780C4, or selection model is the logical device of ArriaGXEP1AGX35F484C6.
The first described optical module 22 is identical with the second optical module 52 structure, what optical module can commercially be bought arrives, and can use, as the module of the GLC-LH-SM of CISCO company can be selected, or the module of the SFP-GE-L of selection CISCO company, or select the module of the SFP-GIG-LX of Alcatel company.
The present invention for the communication means of the group network system of bidirectional optical fiber communication in bus-network, it is host computer and all slave computers are communicated by self-defining communication protocol frame format, described communication protocol frame format includes as shown in Figure 2: frame head synchronization character, for identifying the initial of frame；Receive the numbering of unit, for reception element address is configured, require to be configured to reception element number broadcast address, multicast address and point-to-point communication address according to different application；Data type, is what kind of data for what illustrate to transmit, and described data type includes common digital of digital video data and common digital audio-frequency data, or status poll value and control command；Data length, for illustrating the length of actually active data；Data, are the contents to transmit of actually active data.
For downlink optical fiber (downlink), in the present invention, each slave computer can be carried out division in logic and packet by self-defining communication protocol frame format, give the unique numbering of each packet and in each packet, give each communication end point uniquely number, such host computer and slave computer can realize traditional point-to-point fiber optic communication, according to actual requirement flexible configuration, the slave computer of different grouping can be realized multicast functionality and all of slave computer is realized broadcast capability again.For uplink optical fibers (up-link), the communication protocol frame format of the present invention utilizes the unique feature of communication end point geocoding to make host computer only select one of them slave computer to communicate at synchronization, and other slave computer then keeps mourning in silence.
As it is shown on figure 3, the communication mode of host computer comprises the steps: in the present invention
1) equipment initializes:
2) address configuration, sets a unique numbering to host computer；
3) host computer broadcasting digital information is to slave computer, and enters waiting state；
4) judge whether in the wait state to receive the instruction that host computer needs to communicate with certain slave computer, be enter next step, otherwise still in waiting state；
5) transmission is set up connection packet and waits slave computer response；
6) if not receiving the reply data bag of slave computer in the count value of regulation, then enter step 8), if receiving the reply data bag of slave computer, then enter step 7), count value described here refers to that the host computer set in enumerator is sent the number of times setting up connection packet, this step also includes when after host computer transmission packet, slave computer is not replied, and Counter Value subtracts 1；
7) communicate with slave computer, and produce sign off packet or accept the sign off packet of slave computer.
8) sign off, return step 3) waiting state in.
As shown in Figure 4, in the present invention, the communication mode of slave computer comprises the steps:
1) equipment initializes:
2) address configuration, sets a unique numbering to each slave computer；
3) receive the digital information of host computer broadcast, and enter waiting state；
4) judge whether to receive that host computer sends sets up connection packet in the wait state, be enter next step, otherwise return step 3) waiting state；
5) send foundation and connection reply packet to host computer；
6) communicate with host computer, and produce sign off packet or accept the sign off packet of host computer；
7) sign off, return step 3) waiting state.
The group network system of bidirectional optical fiber communication in a kind of bus-network of the present invention, can be used for currently using optical fiber as in the systems such as the visible dialogue system of transmission medium, audio frequency broadcast in fact, the information of all terminals (slave computer) is issued by centralized control unit (host computer), status monitoring, and voice, video communication.
Claims (5)
1. the communication means of the group network system of bidirectional optical fiber communication in a bus-network, the group network system of bidirectional optical fiber communication in bus-network, include the slave computer (6) of host computer (1) and more than 1, described host computer (1) connects the uplink optical fibers (4) being used for communicating with slave computer (6) and downlink optical fiber (3) respectively by light near-end machine (2), the slave computer (6) of described more than 1 connects the uplink optical fibers (4) and downlink optical fiber (3) that are used for communicating with host computer respectively each via a light remote termination (5), it is characterized in that, host computer and all slave computers are communicated by self-defining communication protocol frame format, described communication protocol frame format includes: frame head synchronization character, for identifying the initial of frame；Receive the numbering of unit, for reception element address is configured, require to be configured to reception element number broadcast address, multicast address and point-to-point communication address according to different application；Data type, is what kind of data for what transmission was described；Data length, for illustrating the length of actually active data；Data, are the contents to transmit of actually active data；
The communication mode of host computer comprises the steps:
1) equipment initializes:
2) address configuration, sets a unique numbering to host computer；
3) host computer broadcasting digital information is to slave computer, and enters waiting state；
4) judge whether in the wait state to receive the instruction that host computer needs to communicate with certain slave computer, be enter next step, otherwise still in waiting state；
5) transmission is set up connection packet and waits slave computer response；
6) if not receiving the reply data bag of slave computer in the count value of regulation, then step 8 is entered), if receiving the reply data bag of slave computer, then enter step 7)；
7) communicate with slave computer, and produce sign off packet or accept the sign off packet of slave computer；
8) sign off, return step 3) waiting state in.
2. the communication means of the group network system of bidirectional optical fiber communication in bus-network according to claim 1, it is characterised in that described data type includes common digital of digital video data and common digital audio-frequency data, or status poll value and control command.
3. the communication means of the group network system of bidirectional optical fiber communication in bus-network according to claim 1, it is characterised in that step 6) described in count value refer in enumerator set host computer sent the number of times setting up connection packet.
4. the communication means of the group network system of bidirectional optical fiber communication in bus-network according to claim 1, it is characterised in that step 6) in also include when host computer sends that slave computer is not replied after packet, Counter Value subtracts 1.
5. the communication means of the group network system of bidirectional optical fiber communication in bus-network according to claim 1, it is characterised in that the communication mode of slave computer comprises the steps:
1) equipment initializes:
2) address configuration, sets a unique numbering to each slave computer；
3) receive the digital information of host computer broadcast, and enter waiting state；
4) judge whether to receive that host computer sends sets up connection packet in the wait state, be enter next step, otherwise return step 3) waiting state；
5) send foundation and connection reply packet to host computer；
6) communicate with host computer, and produce sign off packet or accept the sign off packet of host computer；
7) sign off, return step 3) waiting state.
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| CN105262745B (en) * | 2015-10-10 | 2019-05-10 | 佛山市湘德智能科技有限公司 | A kind of customized frame format driving method and program based on TCP/IP communication protocol |
| CN108988947A (en) * | 2018-08-08 | 2018-12-11 | 岳阳林纸股份有限公司 | Composite fiber communication system based on PROFIBUS bus |
| CN109489185B (en) * | 2018-11-16 | 2020-06-26 | 珠海格力电器股份有限公司 | Air conditioning system, control method and internal machine controller |
| CN111049583B (en) * | 2019-12-24 | 2020-10-30 | 合肥国科天迅科技有限公司 | MPFC multi-protocol optical fiber channel terminal equipment |
| CN111510219A (en) * | 2020-04-15 | 2020-08-07 | 联合华芯电子有限公司 | Bidirectional optical fiber communication method in bus type network |
| CN111541487B (en) * | 2020-04-22 | 2021-12-24 | 四川思创优光科技有限公司 | Networking method of multimode fiber laser and multimode fiber laser |
| CN113259860B (en) * | 2021-06-15 | 2021-10-19 | 四川九通智路科技有限公司 | Ad hoc network method based on Bluetooth broadcast communication |
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