CN102572899A - Wireless fidelity (WIFI) backbone data platform based on dynamic power and Ethernet ring network technology - Google Patents
Wireless fidelity (WIFI) backbone data platform based on dynamic power and Ethernet ring network technology Download PDFInfo
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Abstract
The invention relates to a wireless fidelity (WIFI) backbone data platform based on dynamic power and Ethernet ring network technology and expounds a novel Ethernet ring network technology. According to the Ethernet ring network technology, 64 wireless bridge devices with double wireless network cards are used, and a total wireless bridging layer-two communication protocol is used for implementing the whole wireless link based on 2.4G WIFI. The wireless networking technology especially aiming at the special irregular underground mine environment is used for implementing an ultra-long wireless backbone data platform of a main ramp of a mine and is also suitable for the occasions such as factory, hospital, intelligent building and the like. According to the networking technology, the transmission protocol is optimized on the basis of the standard wireless network bridge, the signal sending power in the link layer is automatically adjusted according to the wireless communication quality between two adjacent devices, the communication quality is optimized, multiple technological bottlenecks of networking a long-distance wireless network underground such as multipath interference, same frequency interference and the like are overcome, the Ethernet ring network technology is used, and the WIFI and the optical fiber are combined with the Ethernet ring network, so that the network has a very good redundancy.
Description
Technical field
The present invention relates to the wireless network communication technology, the key data platform of particularly a kind of WIFI based on dynamic power test and ethernet technology
Background technology
Ethernet (Ethernet) refers to by Xerox company and creates and by the baseband LAN standard that Xerox, Intel and DEC develop jointly, be the most general communication protocol standard that existing now local area network (LAN) adopts.Ethernet uses CSMA/CD (csma and collision detection) technology, and operates on polytype cable with the speed of 10M/S.Ethernet and IEEE8023 series standard are similar.Ethernet adopts the carrier frame of band collision detection to listen multiple access (CSMA/CD) mechanism.Node can be seen all information of in network, sending in the Ethernet, and therefore, we say that Ethernet is a kind of radio network.The course of work of Ethernet is following.When a main frame in the Ethernet will transmit data, it will carry out as follows:
1, receipts do not have signal in transmission on the monitor channel.If any, show that channel is in busy condition, just continue to monitor, till channel idle
2, if do not listen to any signal, just transmit data
Continue when 3, transmitting to monitor, then carry out back off algorithm as finding conflict, random wait is after a period of time, and (when taking place when conflicting, the computer that relates to conflict can transmission can turn back to the monitor channel state to execution in step 1 again.
4, if not finding conflict then sends successfully, all computers must send the back in the last time and wait for 9.6 microseconds (with the 10Mbps operation) before attempting to send data again.
WIFI be a kind of can be with PC, handheld device terminals such as (like PDA, mobile phones) with the interconnected technology of wireless mode.WIFI is the brand of a Wi-Fi communication technology, is held by WIFI alliance (WIFI Alliance).Purpose is to improve based on the interoperability between the Wi-Fi product of IEEE 802.11 standards.Current common people can lump WIFI and IEEE802.11 together, even are equal to wireless internet to WIFI
So-called WIFI is exactly the another name of IEEE 802.11b in fact, is the industry term of being issued by the tissue of " the compatible alliance of wireless ethernet " by name, and Chinese is translated into " wireless compatible authentication ".It is a kind of short range wireless transmission technology, can in hundreds of feet scopes, support the radio signal that the Internet inserts.With the development of work technology, and the appearance of standards such as IEEE 802.11a and IEEE 802.11g, IEEE 802.11 these standards are made WIFI by general designation now.From application, use WIFI, the user at first will have the compatible user end apparatus of WIFI.WIFI is a kind of technology of energizing that helps user capture Email, Web and streaming video.It provides wireless broadband internet visit for the user.Simultaneously, it also be at home, office or on the road online fast, fast way.The place that can visit the WIFI network is called as focus.WIFI or 802.11G are in the work of 2.4Ghz frequency range, and the speed of being supported is up to 54Mbps.The agreement that also has two kind of 802.11 space in addition comprises (a) and (b).They also are public uses, but 802.11G is the most commonly used in the world
Summary of the invention
The present invention is a kind of wireless networking technology; Through detecting the wireless transmission quality of two-way link; Through the power grade of adaptive algorithm dynamic adjustments radio receiving transmitting module, optimized communication quality, suppressed the multipath interference, with disturb frequently etc. a plurality of in the down-hole networking length apart from the technical bottleneck of wireless networking.Simultaneously this networking technology adopts wireless technology to set up Ethernet and adopts the looped network control protocol to carry out annular networking simultaneously, utilize the looped network protection technology to realize the manageability and the reliability of special industry network requirement.The carrier sense physical signal detection that the conflict that realizes in conjunction with 802.11 agreement MAC layers is avoided and the virtual detection method is avoided the radio frequency conflict and judge the transmission quality of uplink and downlink signals according to the frame number of retransmissions in the MAC layer.Adopt a kind of adaptive control algorithm to improve the transmission quality of Radio Link according to detected wireless link signals quality through dynamically arranging the wireless receiving and dispatching power level.Utilize ring-network topology, when the network equipment or link occurs fault, can fast and effeciently switch on the backup link, and guarantee existing professional unaffected.In the special industry application, other fault recovery level of 50ms level is to satisfy the business continuance requirement.When a certain node uplink and downlink signals quality in the link was lower than the threshold value of setting, then looking this node was the fault point, and it is weeded out from link, and the related data communication switches on the backup link, guaranteed that the data service bandwidth is unaffected.
Description of drawings
Fig. 1 is an ERP ring network structure sketch map of the present invention
Fig. 2 is a T-MPLS ring network structure sketch map of the present invention
The practical implementation method
The technology that Ethernet adopts is that mechanism is intercepted in broadcasting.If Ethernet Cheng Huanhou will form broadcast storm, cause whole network all to be full of data traffic, cause network paralysis.This just technical characterstic when setting up double layer network, all adopts tree network.Each node has only a unique upstream node, and network can not form loop, has caused Ethernet not have looped network protection mechanism, and this just is difficult to reach the carrier-class reliabilty and availability.Use for reference the looped network protection theory of SDH, so just produced the Ethernet ring network technology.Main technical principle is to utilize ring-network topology, when the network equipment or link occurs fault, can fast and effeciently switch on the backup link, and guarantee existing professional unaffected.In field of telecommunications, other fault recovery level of 50ms level can satisfy the business continuance requirement.
G.8032, ITU-T has provided clear and definite networking target and definition for ethernet ring network; The ring topology that ethernet ring network is made up of the compatible ethernet node of one group of IEEE802.1 is wherein mainly proposed; Each node links to each other through two nodes in central port and other based on 802.3 media interviews controls (MAC); And ethernet mac can be carried (like the pseudo-line of Ethernet of SDHVC, MPLS etc.) by other service layers technology, can be directly between all nodes perhaps indirect communication.Simultaneously; Ethernet ring network had both referred to that the physics ring topology also referred to logical topology, and wherein service traffics based on the forwarding rule forwarding of IEEE 802.1 standards, are supported point-to-point (E-Line) fully, multiple spot is to multiple spot (E-LAN) and put multiple spot Ethernet services such as (E-Tree); Comprise Ethernet Private Line (EPL) and EVPL (EVPL); Support the communication of various patterns, comprise clean culture, multicast and broadcasting, can prevent the out-of-sequence of data and repetition.And to looped network interconnection, the Ethernet looped network can interconnect through 3 kinds of patterns: the node of sharing, the link of being made up of two shared nodes, by the overlapping many ring/layer networks that form of ethernet ring network.The professional looped network that can pass through interconnection is realized transmitting end to end.
In practical application, often can see the network of common Ethernet switch composition ring topology, like triangle topology and square shape topology etc., these topologys are not the looped network technology.Briefly, annular networking is the basis and the prerequisite of looped network technology.And the looped network technology is except becoming ring on physical topology, and equipment is also wanted supporting ring network control system agreement.When adopting the square shape networking such as switch, just on topological structure, become ring, do not adopt looped network technology and agreement usually, the forwarding of equipment and other behaviors are not different with netted networking, thereby are not the looped network technology.Have only and adopt the ring topology network of looped network control protocol to be only the looped network technology.Ethernet looped network resist technology is the link layer protocol of a kind of specialized application in Ethernet ring; It can prevent the broadcast storm that data loopback causes in Ethernet ring; When Ethernet ring uplink or equipment fault, can switch to backup link rapidly, guarantee professional fast quick-recovery.The quick fault recovery principle of ERP agreement is to utilize control Virtual Local Area Network transmission ring network control system information special-purpose in the looped network; The topological feature that combines looped network itself simultaneously; When network breaks down, find fast, thereby and launch backup link and accomplish fast quick-recovery.Be not both with the maximum of other protection mechanisms, ERP can need not the capacity outside the allocation on ring for multicast service provides protection, and all capacity on the ring can be used for carrying shielded flux of multicast.According to present Ethernet ring protection turning protocol (G.8032/Y.1344); The ERP technology needs in each ring, can dispose a main controlled node earlier in the course of work; Other node is a transmission node, and through transmitting-receiving corresponding protocol frame, main controlled node can detect loop very soon; According to prolonging principle the most in short-term, a ring port choosing a node of this ring is changed to blocked state.The ERP ring network structure is as shown in Figure 1.Node D is made as blocked state among Fig. 1.And the ring port of other nodes is changed to forwarding state; The port that is in blocked state is only handled the related protocol message of the distributed ether ring protection of lightweight algorithm (LDEPA), and abandons other data and control message, thereby reaches the purpose of looped network from breaking off in logic, has solved the problem of looped network broadcast storm.
When a certain link is out of order in ring; Transmission switching mechanism detects link failure can send a message to host exchange at once, and host exchange unblocks the port that gets clogged at once, rapidly the forwarding of restore data; After other nodes on the ring are received failure notice message, empty address forwarding table; If this node has ring to go up port blocked, then this port is changed to forwarding state.After the fault recovery, find that the node of fault recovery is at first confirmed to recover through Wait to Restore Time,, and will keep blocked state with the port that faulty section links then to the both sides of ring announcement fault recovery message.
Resilient packet ring technology is a kind of mac-layer protocol of on ring type structure, optimizing the data service transmission of IEEE 802.17 definition; Multiple physical layer (like SDH, WDM, Ethernet etc.) can be adapted to, polytype business such as speech, data, video can be transmitted effectively.RPR has defined brand-new frame structure, is a kind of frame structure of double-deck MAC Address.The RPR frame makes RPR be positioned a looped network agreement and technology through increasing some special field such as life span (TTL), the relevant looped network control field of Control.The MAC agreement of RPR is also different fully with common Ethernet, and RPR exchanges except relying on layer MAC address (being used to identify the link point device), also will rely on fields such as TTL, Control to accomplish operations such as loop selection, frame inspection life cycle.RPR has also defined Operations, Administration and Maintenance (OAM) frame and the agreement that only are used for the RPR technology of self-contained, is used for Topology Discovery, fault detect, Performance Detection, fairness control etc.
RPR is reciprocal dicyclo topological structure, and every section light path on the ring is operated on the same speed.Different is, the dicyclo of RPR can both transmit data, and two rings are called 0 ring (Ringlet0) and 1 ring (Ringlet1) respectively, and the data transmission direction of RPR 0 ring is a clockwise direction, and the data transmission direction of 1 ring is a counter clockwise direction.Each RPR node has all adopted the 48 bit mac addresses of using in the Ethernet as address designation, and therefore from RPR node device link layer, the physics optical interface of these two pairs of transmitting-receivings is a link layer interface; From network layer, also only need to distribute an interface IP address.The link section of being called between two adjacent R PR nodes, a plurality of continuous sections and the node on it constitute the territory.RPR has adopted the loop configuration of SDH, has also inherited especially big characteristics simultaneously, is exactly that the fault self-recovery ability is very strong, can realize that the error protection in the 50ms time is switched.When link failure took place, the intra-node at the faulty link two ends linked together 0 ring and 1 ring, forms a new looped network again.
The Multi-Protocol Label Switch (MPLS) technology exchanges based on label, can support the transmission of data service simultaneously, and the T-MPLS technology is exactly to inherit on the MPLS data characteristics basis, realizes the unified multi-service tranmission techniques of carrier class demand.Loop network based on the T-MPLS technology is called TM-SPRing (being the T-MPLS protection rings) again.The technology that T-MPLS looped network protection technology is protected business in TM-SPRing exactly fast.
The T-MPLS looped network is to transmit looped network through the T-MPLS LSP that the logical construction mapping mode makes up.In TM-SPRing, set up the logic neighbouring relations between each node, the foundation of corresponding annexation does not receive the restriction of physical equipment, MAC topology.Connection between the adjacent node is called section, and in the T-MPLS looped network, section is two-way connection, can be the link of physics, also can be connection in logic.The transmission passage entity that is used for transport service between looped network node is by realizing based on T-MPLS one group echo interchange channel (LSP).It is the twin nuclei that one or more LSP constitutes that looped network carries entity; The service route of two rings is opposite; Can be divided into clockwise direction and counter clockwise direction, be standard with concrete traffic direction, also can be divided into building ring (Working service direction) and guard ring (Working service in the other direction).Each ring can be set up many LSP according to the number of services needs, is the different LSP of different business flow distribution.The protection of TM-SPRing is to the adjacent node section, and whether professional protection switches is to decide by the signal quality quality of section.T-MPLS looped network ring network structure is as shown in Figure 2.
In order to prevent that the adjacent node section lost efficacy, under situation about breaking down, need to confirm perfect protection mechanism; To realize quick protection to fault; At present, in TM-SPRing, adopt two kinds of protection mechanisms: source routing (Steering) mode and loopback (Wrapping) mode.The former is exactly that source node changes the path after the discovery fault, walks around malfunctioning node, directly data flow is sent to destination node; The latter is looped back to data flow on another ring near the node of fault, through long path, allow data flow keep with destination node between be connected.After both maximum differences are that fault takes place, initiate the node difference that data flow is redirected.The former is the source node that sends data flow, and the latter then is the neighbors near fault.It is short that start-up time is switched in the protection of Loopback Mode, and corresponding packet loss is less, but the protection path of switching is not the optimization route; The protection path of source routing mode is the optimization route, and it is longer that still start-up time is switched in protection, and corresponding packet loss is more.
In T-MPLS SPRing, APS (APS) information is used for reference quick protective switch technology among the SDH and is realized that fault detect and protection switch.Under normal circumstances, a trouble-free node is reported normal state to its adjacent node, and destination node is an adjacent node; Under failure condition, the suitable bridge joint request of the fault discovery node two-way initiation of meeting is for transmission information between the first end-node of switching to loopback mode, is to transmit fault section information at the whole network to the source routing pattern.The source node of APS information is that fault is found node, and destination node is its adjacent node, i.e. another node of fault section.Any non-destination node is taked transparent transmission to APS information.Under the situation that fault section lost efficacy, APS information is with all nodes on the traversal ring between the destination node of source.Each node processing APS information is also carried out switching action in respective nodes, realizes protection professional on the looped network.
Claims (9)
1. wireless networking technology; It is characterized in that through detecting the wireless transmission quality of two-way link; Through the power grade of adaptive algorithm dynamic adjustments radio receiving transmitting module, optimized communication quality, suppressed the multipath interference, with disturb frequently etc. a plurality of in the down-hole networking length apart from the technical bottleneck of wireless networking.
2. a wireless networking technology is characterized in that this networking technology adopts wireless technology to set up Ethernet and adopts the looped network control protocol to carry out annular networking simultaneously, utilizes the looped network protection technology to realize the manageability and the reliability of special industry network requirement.
3. according to the described wireless networking of claim 1 technology, the carrier sense physical signal detection that one of its major technique is avoided for the conflict that combines 802.11 agreement MAC layers to realize and the virtual detection method is avoided the radio frequency conflict and judge the transmission quality of uplink and downlink signals according to the frame number of retransmissions in the MAC layer.
4. according to claim 1,3 described wireless networkings technology, one of major technique improves the transmission quality of Radio Link for adopt a kind of adaptive control algorithm according to detected wireless link signals quality through dynamically arranging the wireless receiving and dispatching power level.
5. according to the described wireless networking technology of claim 2, its principle is to utilize ring-network topology, when the network equipment or link occurs fault, can fast and effeciently switch on the backup link, and guarantee existing professional unaffected.In the special industry application, other fault recovery level of 50ms level can satisfy the business continuance requirement.
6. according to claim 1,2,3; 4 described wireless networking technology; When a certain node uplink and downlink signals quality in the link was lower than the threshold value of setting, then looking this node was the fault point, and it is weeded out from link; The related data communication switches on the backup link, guarantees that the data service bandwidth is unaffected.
7. according to claim 1, it is characterized in that being with outer transmission, topological structure, failure diagnosis, functions such as Control Node.
8. according to claim 1, it is characterized in that this wireless networking technology introducing TM-SPRing Ethernet looped network resist technology.
9. according to require 1 with all strength, it is characterized in that this radio network technique introducing resilient packet ring technology.
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| CN114844804A (en) * | 2022-06-01 | 2022-08-02 | 重庆奥普泰通信技术有限公司 | Network measurement method, system, electronic device and computer readable storage medium |
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Application publication date: 20120711 |