CN105208617A - Routing method for fire fighting rescue network and communication device - Google Patents
Routing method for fire fighting rescue network and communication device Download PDFInfo
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- CN105208617A CN105208617A CN201510501337.5A CN201510501337A CN105208617A CN 105208617 A CN105208617 A CN 105208617A CN 201510501337 A CN201510501337 A CN 201510501337A CN 105208617 A CN105208617 A CN 105208617A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a routing method for the fire fighting rescue network and a communication device. The routing method comprises steps that, to-be-transmitted fire fighting data is acquired through a wireless sensing element; a next base station type node and a node type which can receive the fire fighting data are determined, the node type is a fire fighting command vehicle, the node is taken as a target node, and a final routing path from the wireless sensing element to the target node is determined; if the node type is a relay base station, a routing path from the wireless sensing element to the node is recorded, a relay routing path from the node to the fire fighting command vehicle is acquired, and the fire fighting vehicle is taken as the target node to determine the final routing path; through the data transmission method based on a balancing network load, data transmission is carried out according to the final routing path. The communication device comprises the wireless sensing element and wireless coverage and relay equipment which are in mutual wireless communication. Through the method, the optimum routing capable of accomplishing data transmission can be searched among various nodes, and the method further has advantages of rapid transmission speed, high efficiency and high accuracy.
Description
Technical field
The present invention relates to route technology, particularly relate to a kind of method for routing for fire-fighting and rescue network and communication device.
Background technology
Along with the development of society and economy, urban modernization degree improves constantly, and building structure at different levels is complicated, kind is many, and the burst accident incidences such as cities and towns fire are day by day soaring, also increase the requirement of the modernization of fire-fighting rescue technique and intelligence degree.
The feature of fire-fighting and rescue accident is: the first, disaster linksystem.Little disaster can cause linksystem disaster, causes large-scale and great disaster accident; The second, on-scene communication can not effective guarantee, because disaster causes on-the-spot chaotic, communication line and equipment may be damaged, to such an extent as to fire-fighting and rescue commander work can not smooth and easyly be carried out, or command delayed; 3rd, personal security ensures first.When disaster occurs, first to ensure the life security of fire-fighting and rescue personnel and on-the-spot trapped personnel.Fire-fighting and rescue command centre is the informatization platform of fire-fighting rescue, and during generation severe and great casualty, fire-fighting and rescue command centre and floor manager personnel accurately and timely can understand field condition, carry out science commander, reduces the loss of people's wealth.
There are the following problems when transmitting for the data of current fire-fighting and rescue:
When adopting cable communicating technology to carry out fire-fighting and rescue transfer of data, greatly affected by environment, network configuration underaction, easily cause the wasting of resources and cost to increase, wiring is complicated, and communication line is fragile, and communication line maintenance cost is high.
Adopting wireless communication technology when carrying out fire-fighting and rescue transfer of data, because being subject to armored concrete the serious shielding of the building being agent structure, causing signal seriously weak, the interference of signal in environment in addition, is difficult to be transferred to fire fighting command car.The data of transmission are needed to comprise on-the-spot fire-fighting and rescue personal information (position, thermal imaging and heartbeat etc.) and field conditions (smog, temperature, video and audio frequency etc.), namely allow to be linked in cordless communication network, existing Wireless Mesh technology, WiFi technology and ZigBee technology etc. are also subject to certain impact and restriction in the data transmission, and cause data normally can not arrive objective.
Summary of the invention
Give hereinafter about brief overview of the present invention, to provide about the basic comprehension in some of the present invention.Should be appreciated that this general introduction is not summarize about exhaustive of the present invention.It is not that intention determines key of the present invention or pith, and nor is it intended to limit the scope of the present invention.Its object is only provide some concept in simplified form, in this, as the preorder in greater detail discussed after a while.
Given this, the invention provides the method for routing for fire-fighting and rescue network and communication device, to solve easily impaired, the problem that not easily arrives destination of data in current fire-fighting and rescue data transmission technology.
According to an aspect of the present invention, provide a kind of method for routing for fire-fighting and rescue network, it is characterized in that, node in described fire-fighting and rescue network comprises collection category node and base station category node, wherein, described collection category node comprises wireless sensing unit, and described base station category node comprises relay base station, fire fighting command car and fire-fighting and rescue command centre; The described method for routing for fire-fighting and rescue network comprises: step one, by wireless sensing unit gather fire-fighting data waiting for transmission; Step 2, determine the next base station category node that can receive described fire-fighting data waiting for transmission according to signal strength signal intensity, and judge the node type of this node: when the node type of this node is as fire fighting command car, using this node as destination node, to determine the final route path from described wireless sensing unit to described destination node; When the node type of this node is relay base station, record the routed path of described wireless sensing unit to this node, and the transistroute path obtained from this node to fire fighting command car, using the fire fighting command car in described transistroute path as destination node, to determine the final route path from described wireless sensing unit to described destination node; Step 3, based on balance network load data transmission method, transmit described fire-fighting data waiting for transmission according to described final route path.
Further, the step that the determination in step 2 can receive the next base station category node of described fire-fighting data waiting for transmission comprises: steps A 1, signalization intensity threshold; Steps A 2, by calculating signal strength signal intensity, obtaining and can cover all base stations category node of described wireless sensing unit; Steps A 3, obtain all base stations category node in, the base station category node selecting wherein signal strength signal intensity to be greater than described signal strength threshold is used as both candidate nodes, and base station category node maximum for signal strength signal intensity in described both candidate nodes is defined as the next base station category node that can receive described fire-fighting data waiting for transmission; Wherein, when there is not described both candidate nodes in all base stations category node obtained, abandoning described fire-fighting data waiting for transmission and terminating route.
Further, when the node type of the described next base station category node determined in step 2 is relay base station, the step in the transistroute path of described acquisition from this node to fire fighting command car comprises: step B1, arrange bandwidth capacity threshold value and network maximum bandwidth capacity; Step B2, according to the relay base station quantity in described network maximum bandwidth capacity and described fire-fighting and rescue network and fire fighting command car quantity, by to the relay base station in described fire-fighting and rescue network and fire fighting command car mean allocation bandwidth, obtain node maximum bandwidth capacity; Step B3, obtain Optimization route path from described next base station category node to fire fighting command car by following process: obtain the institute's likely routed path from described next base station category node to the fire fighting command car that may arrive, wherein, using the described fire fighting command car that may arrive as destination node; Calculate from described next base station category node to the distance of described destination node in every bar possibility routed path, and by all distances of calculating according to sorting from small to large; Institute after sequence is likely in routed path, the routed path of " the remaining bandwidth capacity received after described fire-fighting data waiting for transmission is more than or equal to described bandwidth capacity threshold value " of satisfying condition first is defined as described Optimization route path, using as described transistroute path; Wherein, when after sorting likely there is not the routed path of satisfy condition " the remaining bandwidth capacity received after described fire-fighting data waiting for transmission is more than or equal to described bandwidth capacity threshold value " in routed path time, abandon described fire-fighting data waiting for transmission and terminate route.
Further, the acquisition in step B3 from described next base station category node to the fire fighting command car that may arrive the step of likely routed path comprise: step C1, jumping figure threshold value is set; Step C2, using described next base station category node as initiation node, by described initiation node to the base station category node broadcast signal adjacent with described initiation node; Step C3, receive the base station category node of route signal of described initiation node to described initiation node reverts back answer signal; Step C4, described initiation node judge whether receive answer signal within a time cycle: if judged result is "No", then return and perform step C2; If judged result is "Yes", then perform step C5; Step C5, the response node at answer signal place received by described initiation node add routing table entry; Whether step C6, the type judging this response node are " fire fighting command car ": if the type of this response node is not " fire fighting command car ", perform step C7; Otherwise, perform step C14; Whether step C7, judgement " i+1<=jumping figure threshold value " set up, and when " i+1<=jumping figure threshold value " is set up, perform step C8; Otherwise, perform step C14; Step C8, not that the response node of " fire fighting command car " is defined as i-th of described initiation node and jumps off trip and initiate node by being judged as in step C6; Wherein, the initial value of i is 1; Step C9, each i-th jumps off trip and initiates node broadcasts route signal, receives this and i-th jumps off base station category node that trip initiates the route signal of node and i-th jump off trip to this and initiate node reverts back answer signal; Step C10, each i-th jumps off trip initiation node and judges whether receive answer signal within a time cycle: if judged result is "No", then perform step C11; Otherwise, perform step C12; Step C11, terminate route signal to described initiation node reverts back, this i-th is jumped off trip and initiates node and delete from routing table receiving after this terminates route signal by described initiation node, and process terminates; Step C12, this i-th is jumped off base station category node that trip initiates non-initiation node corresponding to the answer signal that receives of node and be defined as i-th+1 and jump off trip and initiate node, and jump off determine all i-th+1 trip initiate node be transmitted to described initiation node, described initiation node jump off all i-th+1 trip initiate node add routing table entry; Step C13, described initiation node judge that all i-th+1 jumps off trip and initiate whether to include the node that type is " fire fighting command car " in node: if all i-th+1 jumps off trip to initiate containing type in node be the node of " fire fighting command car ", execution step C14; Otherwise, perform step C15; Step C14, the node being " fire fighting command car " by described type are defined as destination node, and obtain all routed paths from described initiation node to each destination node, and terminate route, process terminates; Step C15, make i'=i+1, and the value of i is updated to the value of current i', judge whether " current i'<=jumping figure threshold value " is set up: if set up, return and perform step C10; Otherwise process terminates.
Further, the data transmission method based on balance network load in step 3, the step transmitting described fire-fighting data waiting for transmission according to described final route path comprise: step D1, arrange average transmission rate; Step D2, the video in described fire-fighting data waiting for transmission, voice data to be compressed; Step D3, burst process or network code process are carried out to current fire-fighting data waiting for transmission; Step D4, adopt the mode of breakpoint transmission to transmit burst process or network code process successively after fire-fighting data.
Further, step D3 comprises: step D31, described average transmission rate is designated as SendRate, the data volume of described fire-fighting data waiting for transmission is designated as DataNum as the data volume of current data packet, judges the magnitude relationship between DataNum and SendRate; If step D32 DataNum < SendRate, obtain after current data packet is summed up calculating with the proximity data bag of reading current data packet with its close on packet be added after total amount of data DataPlusNum, until
till,
be the change for data volume after network code and reserved amount, wherein,
Wherein, DataNum
h(h=1,2, k) data volume of h proximity data bag of current data packet is represented, k is the number of proximity data bag, encodes to found k proximity data bag and current data packet application random network code method, obtains the packet after coding, wherein, following header information is increased in the head of packet in encoded: the forward node list that the IP address of the numbering of process mark, packet, coding vector, source node and fire fighting command car node and participating in sends, step D33, if DataNum > is SendRate, subpackage process is carried out to described fire-fighting data waiting for transmission, obtain multiple subdata bag, subpackage number DataPartNum in described subpackage process performs according to following formula, DataPartNum=(DataNum+ η)/SendRate, wherein, η is expressed as the change of data volume after data subpackage process and reserved amount, each subdata bag after subpackage process increases following header information: process mark, the numbering of packet, the forward node list that the IP address of source node and fire fighting command car node and participating in sends.
Further, after step D4, if also comprise the steps:, step e 1 receiving node is fire fighting command car, described receiving node is handled as follows: when received packet is through the packet of network code, received packet is decoded, to obtain raw data packets according to header information; When received packet is through the packet of subpackage process, received packet is merged, to restore raw data packets according to header information; When received packet be video or voice data time, reverse decoding is carried out to this packet, to reduce initial data; Step e 2, after described receiving node successfully receives data, in relevant base station category node, delete corresponding routed path record.
Further, the node type of the described next base station category node determined in step 2 is fire fighting command car, the fire-fighting data of described initiation node are directly transferred to described destination node, and are stored in the memory of described destination node; The node type of the described next base station category node determined in step 2 is relay base station, timing by the transfer of data of fire fighting command car to described fire-fighting and rescue command centre, transmitting procedure is as follows: after the time interval to be polled arrives, traversal fire fighting command car, to described fire-fighting and rescue command centre transmit each fire fighting command car receive and the fire-fighting data stored, and these fire-fighting data to be stored in the memory of described fire-fighting and rescue command centre.
According to another invention of the present invention, additionally provide a kind of communication device, it is characterized in that, described communication device comprises wireless sensing unit and wireless coverage and trunking; Described wireless sensing unit comprises power supply unit, general data collecting device, video/audio data acquisition equipment, general data process chip, video/audio data processing chip, signal strength signal intensity calculating module and radio receiving transmitting module; Described general data collecting device comprises personnel's three-dimensional position identifier, heartbeat sensor, Smoke Sensor, temperature sensor and thermal imaging apparatus; Described video/audio data acquisition equipment comprises video/audio transducer; Described general data process chip comprises the first Signal-regulated kinase, the first data acquisition module and the first Data Analysis Services module; Described general data collecting device is connected with described first Signal-regulated kinase and carries out signal condition, described first Signal-regulated kinase is connected with described first data acquisition module, described first data acquisition module is connected with described first Data Analysis Services module, described first Data Analysis Services module calculates module with described signal strength signal intensity and is connected, and described first Data Analysis Services module comprises the first reseting module; Described video/audio data processing chip comprises secondary signal conditioning module, the second data acquisition module and the second Data Analysis Services module; Described video/audio data acquisition equipment is connected with described secondary signal conditioning module and carries out signal condition, described secondary signal conditioning module is connected with described second data acquisition module, described second data acquisition module is connected with described second Data Analysis Services module, described second Data Analysis Services module calculates module with described signal strength signal intensity and is connected, and described second Data Analysis Services module comprises the second reseting module; Described general data collecting device, described video/audio data acquisition equipment, described general data process chip and described video/audio data processing chip are powered by described power supply unit respectively; Described wireless coverage and trunking comprise 350M overlay router and 5.8G relay router, and described 5.8G relay router comprises routing calculation module and data transmission module; Two-way communication can be carried out between described 350M overlay router and described 5.8G relay router; Described routing calculation module carries out the router-level topology of transfer of data, and described data transmission module wirelessly carries out communication with other base stations; Wherein, described 350M overlay router is for covering the node around it, and described 5.8G relay router is used for other base station category node transmission data; The radio receiving transmitting module of described wireless sensing unit and the 350M overlay router wirelessly communication of described wireless coverage and trunking; Wherein, the base station category node in described communication device comprises relay base station, fire fighting command car and fire-fighting and rescue command centre, in the category node of each base station, be equipped with described wireless coverage and trunking.
The above-mentioned method for routing for fire-fighting and rescue network of the present invention, the Optimization route that can complete transfer of data can be found between all kinds of base-station node, transmission speed is fast, efficiency is high, accuracy is high, and not easily damaged in transmitting procedure, can arrive destination node quickly and accurately.Adopt the algorithm of balance network load provided by the invention to complete the transmission of the data that wireless sensing unit gathers, efficiency of transmission and the transmission accuracy of data can be improved.
By the process of steps A 1 ~ steps A 3, the signal strength signal intensity of the determined next base station category node for receiving fire-fighting data can be made higher than above-mentioned signal strength threshold.
By the process of step C1 ~ step C15, the wireless transmission of fire-fighting data in method for routing can be ensured under constraint route jumping figure communicates normal situation with guarantee, data can stably be transmitted.
The above-mentioned data transmission method based on balance network load in step 3 is utilized to carry out transfer of data, data merging or subpackage process can be performed according to the selecting factors such as data type and data volume, can farthest utilize node bandwidth resource, and bandwidth capacity restriction can not be exceeded, can ensure that the data of big data quantity are reliably transferred to destination.
Above-mentioned method for routing provided by the invention and communication device, in building construction substance environment, the on-the-spot fire-fighting and rescue personnel after disaster can being occurred and the information of field conditions accurately and timely are transferred to fire fighting command car; Solve the problem of signal attenuation in Wireless MESH network, enhance the interference free performance of signal, and can high efficiency of transmission be carried out.
By below in conjunction with the detailed description of accompanying drawing to most preferred embodiment of the present invention, these and other advantage of the present invention will be more obvious.
Accompanying drawing explanation
The present invention can be better understood by reference to hereinafter given by reference to the accompanying drawings description, wherein employs same or analogous Reference numeral in all of the figs to represent identical or similar parts.Described accompanying drawing comprises in this manual together with detailed description below and forms the part of this specification, and is used for illustrating the preferred embodiments of the present invention further and explaining principle and advantage of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of an exemplary process of the method for routing for fire-fighting and rescue network schematically shown according to the embodiment of the present invention;
Fig. 2 is the process chart that the determination illustrated in step 2 can receive the step of the next base station category node of described fire-fighting data waiting for transmission;
Fig. 3 illustrates that acquisition in step 2 is from described next base station category node to the process chart of the step in the transistroute path of fire fighting command car;
Fig. 4 A and Fig. 4 B be illustrate acquisition in step B3 from described next base station category node to the fire fighting command car that may arrive the process chart of the likely step of routed path;
Fig. 5 is the structured flowchart of an example of the communication device schematically shown according to the embodiment of the present invention.
The element that it will be appreciated by those skilled in the art that in accompanying drawing be only used to simple and clear for the purpose of illustrate, and not necessarily to draw in proportion.Such as, in accompanying drawing, the size of some element may be exaggerated relative to other elements, to contribute to improving the understanding to the embodiment of the present invention.
Embodiment
To be described one exemplary embodiment of the present invention by reference to the accompanying drawings hereinafter.It should be noted is that, in order to avoid the present invention fuzzy because of unnecessary details, illustrate only in the accompanying drawings with according to the closely-related apparatus structure of the solution of the present invention and/or treatment step, and eliminate other details little with relation of the present invention.
The embodiment provides a kind of method for routing for fire-fighting and rescue network, node in this fire-fighting and rescue network comprises collection category node and base station category node, wherein, gather category node and comprise wireless sensing unit, and base station category node comprises relay base station, fire fighting command car and fire-fighting and rescue command centre.The above-mentioned method for routing for fire-fighting and rescue network comprises: step one, by wireless sensing unit gather fire-fighting data waiting for transmission; Step 2, determine the next base station category node that can receive described fire-fighting data waiting for transmission according to signal strength signal intensity, and judge the node type of this node: when the node type of this node is as fire fighting command car, using this node as destination node, to determine the final route path from described wireless sensing unit to described destination node; When the node type of this node is relay base station, record the routed path of described wireless sensing unit to this node, and the transistroute path obtained from this node to fire fighting command car, using the fire fighting command car in described transistroute path as destination node, to determine the final route path from described wireless sensing unit to described destination node; Step 3, based on balance network load data transmission method, transmit described fire-fighting data waiting for transmission according to described final route path.
Below, composition graphs 1 describes an example of the above-mentioned method for routing for fire-fighting and rescue network.
This method for routing is applied in fire-fighting and rescue network, wherein fire-fighting and rescue network (communication device that such as hereinafter will describe) comprises two category nodes, one class gathers category node, another kind of, is base station category node, carries out communicating and transfer of data between two category nodes.
In this example, gathering category node is wireless sensing unit node (hereinafter referred wireless sensing unit).Wireless sensing unit forms " wireless sensing unit " of reference diagram 5 (can) by the personnel's three-dimensional position identification card device in fire-fighting and rescue network, heartbeat sensor, Smoke Sensor, temperature sensor, thermal imaging apparatus, video/audio sensor wireless sensor device.This category node is respectively used to gather corresponding information, the on-the-spot fire-fighting and rescue personnel status after the message reflection disaster gathered occurs, field rescue situation and site environment situation; Can also be used for transmitting and receive data.In this embodiment, wireless sensing unit belongs to fourth stage node, can be carried with by fire-fighting and rescue personnel or place at random.
In addition, base station category node is the node with wireless coverage, data retransmission and data-transformation facility.According to the difference of job function, base station category node can be divided into three types, i.e. relay base station node (hereinafter referred relay base station), fire fighting command car node (hereinafter referred fire fighting command car) and fire-fighting and rescue command center node (hereinafter referred fire-fighting and rescue command centre).Usually, in a fire-fighting and rescue network, relay base station and fire fighting command car can have multiple respectively, and fire-fighting and rescue command centre often only has one.The structure composition of base station category node can " wireless coverage and the trunking " of reference diagram 5.
Relay base station is can wireless sensing unit in wireless coverage certain area, can transmit and receive data.In this embodiment, wireless sensing unit belongs to third level node, and it disposes the principle that setting can follow " in units of floor, ascertaining the number according to spatial area, the window's position near building ".
Fire fighting command car is the mobile command platform of scene of fire and rescue site, it can carry out tandem switching to the data that wireless sensing unit gathers, possess the several functions such as data transmission, data receiver, data storage, data processing, command scheduling, video acquisition, communication support video conference, granting and alarm control, be convenient to floor manager.In this embodiment, fire fighting command car belongs to second level node, usually can be positioned at the neighbouring position of the building outside that disaster occurs.
Fire-fighting and rescue command centre is the informatization platform of fire-fighting rescue, is conducive to fire-fighting and rescue command centre and floor manager personnel understand field condition accurately and timely, carries out science commander when there is severe and great casualty, reduces the loss of people's wealth.In this embodiment, fire-fighting and rescue command centre belongs to first order node, generally can be positioned at administration of the prevention and control department.
In addition, the communication between the node in fire-fighting and rescue network is wirelessly carried out, and the connecting line segment between node represents to have correspondence between two nodes that line segment connects, and this connecting line segment is called on " the communication limit " of fire-fighting and rescue network.Wherein, with signal strength expression communication limit weights 1, its index is according to the communication strength of receiving node after the transmission of communication limit; Dedicated bandwidth capacity represents communication limit weights 2, and its index is according to the bandwidth capacity of receiving node after the transmission of communication limit.
Like this, the nodal information in fire-fighting and rescue network can be described in the following manner:
The set of wireless sensing unit is designated as SE={se
1, se
2..., se
n, wherein n represents the wireless sensing unit number that fire-fighting and rescue network comprises;
Relay base station set is designated as BS={bs
1, bs
2..., bs
m, wherein m represents the relay base station number that fire-fighting and rescue network comprises;
Fire fighting command car set is designated as DC={dc
1, dc
2..., dc
p, wherein p represents the fire fighting command car number that fire-fighting and rescue network comprises;
The set of fire-fighting and rescue command centre is designated as CE={ce
1, ce
2..., ce
q, wherein q represents the fire-fighting and rescue command centre that fire-fighting and rescue network comprises, and this set only has an element under normal circumstances;
" communication limit " set of fire-fighting and rescue network is designated as ED={ed
1, ed
2..., ed
j, wherein j represents communication limit number, and the arbitrary element in this set has attribute start node, terminal node and signal strength signal intensity.
As shown in Figure 1, the exemplary process flow of method for routing starts from step one.Wherein, step one described below to step 3 is with the arbitrary wireless sensing unit se in fire-fighting and rescue network
0for example is described, the processing method of other wireless sensing units is identical therewith, repeat no more.
In step one, by wireless sensing unit se
0gather fire-fighting data waiting for transmission.Wherein, fire-fighting data waiting for transmission comprise business datum and physical location data.Wherein, the type of business datum is relevant with the type of wireless sensing unit, as smoke data is obtained by Smoke Sensor collection; Physical location data draws together node se
0the three-dimensional coordinate of site, comprises x, y and z value.In addition, wireless sensing unit se
0the video/audio data gathered are stored in this node se
0video storage card in prepare against after look into, if the data in data storage card reach the upper limit, will gathered data be abandoned, and give a warning.
Then, in step 2, determine to receive wireless sensing unit se according to signal strength signal intensity
0the next base station category node Nd of the fire-fighting data waiting for transmission gathered (step 2. one).Then, judge described next base station category node Nd node type (step 2. two).
When the node type of described next base station category node Nd be fire fighting command car using this node Nd as destination node, to determine from wireless sensing unit se
0to destination node final route path (step 2. three).
When the node type of described next base station category node Nd is relay base station, record wireless sensing unit se
0routed path to this node Nd (also namely, adds a record Row in the routing table of the 5.8G relay router of node Nd
a, charge to path node se in order
0with node Nd, its interior joint se
0for major key), and obtain the transistroute path from this node Nd to fire fighting command car, using the fire fighting command car in this transistroute path as destination node, to determine from wireless sensing unit se
0to destination node final route path (step 2. four).
Then, in step 3, based on the data transmission method of balance network load, transmit wireless sensing unit se according to this final route path
0the fire-fighting data above-mentioned waiting for transmission gathered.
Further, the step that the determination in step 2 can receive the next base station category node of described fire-fighting data waiting for transmission can comprise steps A 1 ~ steps A 3 as shown in Figure 2.
As shown in Figure 2, in steps A 1, signalization intensity threshold φ, the minimum value of the signal strength signal intensity of receiving node when this signal strength threshold is data arrival receiving node, for judging whether signal can arrive next node, this threshold value can based on experience value or actual needs pre-set.
Then, in steps A 2, by calculating signal strength signal intensity, acquisition can cover wireless sensing unit se
0all base stations category node.
Any base station category node Nd
0apply its 350M overlay router and read wireless sensing unit in fire-fighting and rescue network, the physical location data of relay base station and each category node of fire fighting command car and IP data, and the physical location data of obtained each category node is recorded to this node Nd
0routing table in.The physical location data of node draws together the three-dimensional coordinate of this node site.
According to the weak characteristic in signals transmission, after application data transmission, the signal strength signal intensity of receiving node calculates formula, calculates wireless sensing unit node se successively
0the signal strength values of the node (i.e. base station category node) that arrival has " communication base station device " is designated as S set IG={sig
1, sig
2..., sig
c.
The situations such as reflection, diffraction, diffraction and refraction are easily produced in signal communication process, according to the weak property calculation in signals transmission, " wireless location method based on path loss model parameters is estimated in real time " that transfer of data such as can be delivered by Li Yaoyi with reference to 2010 to the computational process of signal strength signal intensity during receiving node, no longer describes in detail here.
Then, in steps A 3, in all base stations category node obtained, the base station category node selecting wherein signal strength signal intensity to be greater than signal strength threshold is used as both candidate nodes, and is defined as by base station category node maximum for signal strength signal intensity in both candidate nodes receiving wireless sensing unit se
0the next base station category node of the fire-fighting data waiting for transmission gathered.
Wherein, when there is not the both candidate nodes of satisfy condition " signal strength signal intensity is greater than signal strength threshold " in all base stations category node obtained, abandon wireless sensing unit se
0the fire-fighting data waiting for transmission gathered, and terminate route.
Like this, by the process of steps A 1 ~ steps A 3, the signal strength signal intensity of the determined next base station category node for receiving fire-fighting data can be made higher than above-mentioned signal strength threshold.
Further, when the node type of the described next base station category node determined in step 2 is relay base station, the step in the transistroute path of described acquisition from this node to fire fighting command car can be realized by step B1 as described in Figure 3 ~ step B3.
As shown in Figure 3, in step bl is determined., bandwidth capacity threshold value δ and network maximum bandwidth capacity BandWidthMax is set.
Wherein, the unit of bandwidth capacity threshold value δ is Mb/s, and this threshold value is the minimum value of bandwidth capacity of data receiving node when arriving receiving node, for judging whether signal can arrive next node, this threshold value can based on experience value or actual needs set.
The unit of network maximum bandwidth capacity BandWidthMax is Mb/s, it be within the noiseless unscreened ideally unit interval from fire-fighting and rescue network certain a bit to another point by the maximum data rate.
Then, in step B2, according to network maximum bandwidth capacity BandWidthMax set in step B1, and according to the relay base station quantity in fire-fighting and rescue network and fire fighting command car quantity, obtain node maximum bandwidth capacity, also namely, in fire-fighting and rescue network each category node at the maximum bandwidth capacity carrying out can allowing in data transmission procedure.Such as, by the relay base station in fire-fighting rescue net network and fire fighting command car mean allocation bandwidth, above-mentioned node maximum bandwidth capacity can be obtained.Wherein, the computing formula of node maximum bandwidth capacity is:
NodeBW＝BandWidthMax/(m+q)
In this formula, the implication of m, q, with mentioned above, repeats no more here.
Then, in step B3, the Optimization route path from described next base station category node Nd (being now relay base station) to fire fighting command car is obtained by following process:
(1) obtain the institute's likely routed path from described next base station category node Nd to the fire fighting command car that may arrive, wherein, the fire fighting command car that may arrive is as destination node.
(2) calculate from described next base station category node Nd to the distance of destination node in every bar possibility routed path, and by all distances of calculating according to sorting from small to large.
(3) institute after sequence is likely in routed path, the routed path of " the remaining bandwidth capacity received after fire-fighting data waiting for transmission is more than or equal to bandwidth capacity threshold value " of satisfying condition first is defined as the Optimization route path from described next base station category node Nd to fire fighting command car, using by this Optimization route path as transistroute path mentioned above.
The remaining bandwidth capacity BandWidth of each possibility routed path can calculate according to following formula:
BandWidth＝NodeBW-BandWidthLoss
BandWidthLoss is the bandwidth lose of receiving node after being transferred to receiving node from sending node, and unit is Mb/s; NodeBW represents the maximum bandwidth capacity of receiving node.
Wherein, when the institute after sorting likely does not exist the routed path of satisfy condition " the remaining bandwidth capacity received after fire-fighting data waiting for transmission is more than or equal to bandwidth capacity threshold value " in routed path, abandon the first se of wireless sensing
0the fire-fighting data waiting for transmission gathered, and terminate route.
Further, the acquisition in step B3 from described next base station category node to the fire fighting command car that may arrive the step of likely routed path can be realized by step C1 as shown in Figure 4 A and 4 B shown in FIG. ~ step C15.
As shown in Figure 4 A and 4 B shown in FIG., in step C1, jumping figure threshold value Flop is set.The unit of jumping figure threshold value Flop jumps, numerical value >=1, and this value is used for control signal data after multi-hop and decays serious situation.
Then, in step C2, using described next base station category node Nd as initiation node, by this initiation node to the base station category node broadcast signal adjacent with this initiation node.
Then, in step C3, receive the base station category node of the route signal of this initiation node to this initiation node reverts back answer signal.
Then, in step C4, this initiation node judges whether receive answer signal within a time cycle (time cycle such as can preset based on experience value):
If judged result is "No" (namely this initiation node does not receive answer signal within a time cycle), then returns and perform step C2;
If judged result is "Yes" (namely this initiation node receives answer signal within a time cycle), then perform step C5;
In step C5, the response node at the answer signal place received by this initiation node adds routing table entry.Then, step C6 is performed.
In step C6, judge whether the type of replying node is " fire fighting command car ": if the type of response node is not " fire fighting command car " (i.e. "No"), continue to perform step C7, and " i+1<=jumping figure threshold value " is judged (wherein in step C7, the initial value of i is 1) whether set up, step C8 is performed when " i+1<=jumping figure threshold value " is set up, in " i+1<=jumping figure threshold value " invalid situation, perform step C14; If the type of response node is " fire fighting command car " (i.e. "Yes"), perform step C14.
In step C8, not that the response node of " fire fighting command car " is defined as initiating i-th of node and jumps off trip and initiate node by being judged as in step C6.Then, step C9 is performed.
In step C9, each i-th jumps off trip initiates node broadcasts route signal, receives this and i-th jumps off base station category node that trip initiates the route signal of node and i-th jump off trip to this and initiate node reverts back answer signal.
Then, in step C10, each i-th jumps off trip initiation node judges whether receive answer signal within a time cycle:
If judged result be "No" (namely this i-th jump off trip initiate node within a time cycle, do not receive answer signal), then perform C11, in step C11 this i-th jump off trip initiate node to initiation node reverts back terminate route signal, initiate node receive this terminate route signal after by this i-th jump off trip initiate node delete from routing table, then end process;
If judged result be "Yes" (namely this i-th jump off trip initiate node within a time cycle, receive answer signal), then perform step C12, in step C12, this i-th jumps off trip and initiates node this i-th is jumped off base station category node that trip initiates non-initiation node corresponding to the answer signal that receives of node and be defined as i-th+1 and jump off trip and initiate node, and jump off determine all i-th+1 trip initiate node be transmitted to initiation node, initiate node jump off all i-th+1 trip initiate node add routing table entry.Then, step C13 is performed.
In step C13, initiate node and judge that all i-th+1 jumps off trip and initiate whether to include the node that type is " fire fighting command car " in node: if all i-th+1 jumps off trip to initiate containing type in node be the node (i.e. "Yes") of " fire fighting command car ", execution step C14; Otherwise, perform step C15;
In step C14, the node being " fire fighting command car " by described type is defined as destination node, obtain from initiating all routed paths of node to each destination node (the institute's likely routed path as from described next base station category node Nd to the fire fighting command car that may arrive), and terminate route.Process terminates.
In step C15, make i'=i+1, and the value of i is updated to the value of current i', judge whether " current i'<=jumping figure threshold value " is set up: if set up, return and perform step C10; Otherwise process terminates.
Usually, owing to being subject to blocking and absorbing of the material such as armored concrete, timber, signal (or data) intensity can decay along with the increase of jumping figure, makes signal likely cannot arrive destination.By the process of above step C1 ~ step C15, the wireless transmission of fire-fighting data in method for routing can be ensured under constraint route jumping figure communicates normal situation with guarantee, data can stably be transmitted.
Further, the data transmission method based on balance network load in step 3, the step transmitting described fire-fighting data waiting for transmission according to described final route path can be realized by step D1 ~ step D4.
In step D1, average transmission rate is set.Arranging average transmission rate is SendRate, and unit is MB/s, the data volume transmitted from sending node to receiving node in the average transmission rate representation unit time; After data are transferred to receiving node from sending node, the bandwidth capacity of receiving node is designated as BandWidth, then the restrictive condition of average transmission rate is SendRate × 8 < BandWidth.
Then, in step d 2, to wireless sensing unit se
0video in the fire-fighting data waiting for transmission gathered, voice data compress.Video/audio data are considered as required to the factors such as transmission bandwidth, compression ratio, algorithm complex, image quality and node motion characteristic, carry out data compression according to corresponding video compression standard and algorithm.
Then, in step D3, burst process or network code process are carried out to current fire-fighting data waiting for transmission.
Then, in step D4, the fire-fighting data after adopting the mode of breakpoint transmission to transmit burst process or network code process successively.If encounter network failure in data transmission procedure, record is interrupted the interrupt identification BreakFlag object of packet, the unobstructed rear interrupted packet of network continues transmission and arranges the part of interrupting mark.Described interrupt identification BreakFlag object has attribute " package number ", " breakpoint location " and " destination node ".
Further, step D3 can comprise step D31 as described below ~ step D33.
In step D31, data volume waiting for transmission is designated as DataNum, unit is MB, average transmission rate is designated as SendRate, the data volume of fire-fighting data waiting for transmission is designated as DataNum as the data volume of current data packet (is also, using fire-fighting data waiting for transmission as current data packet), judge the magnitude relationship between DataNum and SendRate.
If DataNum < is SendRate, perform step D32, and in this step, obtain after current data packet is summed up calculating with the proximity data bag of reading current data packet with its close on packet be added after total amount of data DataPlusNum, until
till,
be the change for data volume after network code and reserved amount,
Wherein,
DataNum
h(h=1,2, k) data volume of h proximity data bag of current data packet is represented, k is the number of proximity data bag, found k proximity data bag and current data packet application random network code method are encoded, obtain the packet after coding, wherein, following header information is increased in the head of packet in encoded: the numbering of process mark (added process is designated " network code "), packet, coding vector, source node (the i.e. first se of wireless sensing here
0) the forward node list (wherein, forward node such as via node) that sends with the IP address of fire fighting command car node and participating in.
If DataNum > is SendRate, perform step D33, and in this step, subpackage process is carried out to described fire-fighting data waiting for transmission, obtain multiple subdata bag, the subpackage number DataPartNum in described subpackage process performs according to following formula
DataPartNum＝(DataNum+η)/SendRate，
Wherein, η is expressed as the change of data volume after data subpackage process and reserved amount, and each subdata bag after subpackage process increases following header information: the numbering of process mark (process added here is designated " data subpackage "), packet, source node (the i.e. first se of wireless sensing
0) the forward node list (wherein, forward node such as via node) that sends with the IP address of fire fighting command car node and participating in.
The above-mentioned data transmission method based on balance network load in step 3 is utilized to carry out transfer of data, data merging or subpackage process can be performed according to the selecting factors such as data type and data volume, can farthest utilize node bandwidth resource, and bandwidth capacity restriction can not be exceeded, can ensure that the data of big data quantity are reliably transferred to destination.
Further, after step D4, following step e 1 and step e 2 can also be comprised.
Wherein, in step e 1, judge receiving node whether as fire fighting command car, if so, then receiving node be handled as follows:
When received packet is through the packet of network code, received packet is decoded, to obtain raw data packets according to header information;
When received packet is through the packet of subpackage process, received packet is merged, to restore raw data packets according to header information.
In addition, when received packet be video or voice data time, reverse decoding is carried out to this packet, to reduce initial data.
In step e 2, after receiving node successfully receives data, in relevant base station category node, delete corresponding routed path record.
Further, the node type of the described next base station category node Nd determined in step 2 is fire fighting command car, the fire-fighting data initiating node is directly transferred to destination node, and is stored in the memory of destination node.
In addition, the node type of the described next base station category node Nd determined in step 2 is relay base station, each fire fighting command car timing transfers data to fire-fighting and rescue command centre, transmitting procedure is as follows: after the time interval to be polled arrives, fire fighting command car to fire-fighting and rescue command centre transmit each fire fighting command car receive and the fire-fighting data stored, and these fire-fighting data to be stored in the memory of fire-fighting and rescue command centre.
The above-mentioned method for routing for fire-fighting and rescue network of the present invention, the Optimization route that can complete transfer of data can be found between all kinds of base-station node, transmission speed is fast, efficiency is high, accuracy is high, and not easily damaged in transmitting procedure, can arrive destination node quickly and accurately.Adopt the algorithm of balance network load provided by the invention to complete the transmission of the data that wireless sensing unit gathers, efficiency of transmission and the transmission accuracy of data can be improved.
In addition, embodiments of the invention additionally provide a kind of communication device, and as shown in Figure 5, this communication device comprises wireless sensing unit 1 and wireless coverage and trunking 2.
Described wireless sensing unit 1 comprises power supply unit 110, general data collecting device 120, video/audio data acquisition equipment 130, general data process chip 140, video/audio data processing chip 150, signal strength signal intensity calculating module 160 and radio receiving transmitting module 170.
Described general data collecting device 120 comprises personnel's three-dimensional position identifier 121, heartbeat sensor 122, Smoke Sensor 123, temperature sensor 124 and thermal imaging apparatus 125;
Described video/audio data acquisition equipment 130 comprises video/audio transducer 131.
Described general data process chip 140 comprises the first Signal-regulated kinase 141, first data acquisition module 142 and the first Data Analysis Services module 143; Described general data collecting device 120 is connected with described first Signal-regulated kinase 141 and carries out signal condition, described first Signal-regulated kinase 141 is connected with described first data acquisition module 142, described first data acquisition module 142 is connected with described first Data Analysis Services module 143, described first Data Analysis Services module 143 calculates module 160 with described signal strength signal intensity and is connected, and described first Data Analysis Services module 143 comprises the first reseting module 143-1.
Described video/audio data processing chip 150 comprises secondary signal conditioning module 151, second data acquisition module 152 and the second Data Analysis Services module 153; Described video/audio data acquisition equipment 130 is connected with described secondary signal conditioning module 151 and carries out signal condition, described secondary signal conditioning module 151 is connected with described second data acquisition module 152, described second data acquisition module 152 is connected with described second Data Analysis Services module 153, described second Data Analysis Services module 153 calculates module 160 with described signal strength signal intensity and is connected, and described second Data Analysis Services module 153 comprises the second reseting module 153-1.
Described general data collecting device 120, described video/audio data acquisition equipment 130, described general data process chip 140 and described video/audio data processing chip 150 are powered by described power supply unit 110 respectively.
Described wireless coverage and trunking 2 comprise 350M overlay router 210 and 5.8G relay router 220, and described 5.8G relay router 220 comprises routing calculation module 221 and data transmission module 222; Two-way communication can be carried out between described 350M overlay router 210 and described 5.8G relay router 220; Described routing calculation module 221 carries out the router-level topology of transfer of data, and described data transmission module 222 wirelessly carries out communication with other base stations; Wherein, described 350M overlay router 210 is for covering the node around it, and described 5.8G relay router 220 is for transmitting data to other base station category nodes.
The 350M overlay router 210 wirelessly communication of the radio receiving transmitting module 170 of described wireless sensing unit 1 and described wireless coverage and trunking 2.
Wherein, the base station category node in described communication device comprises relay base station, fire fighting command car and fire-fighting and rescue command centre, is equipped with described wireless coverage and trunking 2 in the category node of each base station.
Above-mentioned method for routing provided by the invention and communication device, in building construction substance environment, the on-the-spot fire-fighting and rescue personnel after disaster can being occurred and the information of field conditions accurately and timely are transferred to fire fighting command car; Solve the problem of signal attenuation in Wireless MESH network, enhance the interference free performance of signal, and can high efficiency of transmission be carried out.
Although the embodiment according to limited quantity describes the present invention, benefit from description above, those skilled in the art understand, in the scope of the present invention described thus, it is contemplated that other embodiment.In addition, it should be noted that the language used in this specification is mainly in order to object that is readable and instruction is selected, instead of select to explain or limiting theme of the present invention.Therefore, when not departing from the scope and spirit of appended claims, many modifications and changes are all apparent for those skilled in the art.For scope of the present invention, be illustrative to disclosing of doing of the present invention, and nonrestrictive, and scope of the present invention is defined by the appended claims.
Claims (9)
1. for the method for routing of fire-fighting and rescue network, it is characterized in that, node in described fire-fighting and rescue network comprises collection category node and base station category node, wherein, described collection category node comprises wireless sensing unit, and described base station category node comprises relay base station, fire fighting command car and fire-fighting and rescue command centre; The described method for routing for fire-fighting and rescue network comprises:
Step one, by wireless sensing unit gather fire-fighting data waiting for transmission;
Step 2, determine the next base station category node that can receive described fire-fighting data waiting for transmission according to signal strength signal intensity, and judge the node type of this node:
When the node type of this node is fire fighting command car, using this node as destination node, to determine the final route path from described wireless sensing unit to described destination node;
When the node type of this node is relay base station, record the routed path of described wireless sensing unit to this node, and the transistroute path obtained from this node to fire fighting command car, using the fire fighting command car in described transistroute path as destination node, to determine the final route path from described wireless sensing unit to described destination node;
Step 3, based on balance network load data transmission method, transmit described fire-fighting data waiting for transmission according to described final route path.
2. the method for routing for fire-fighting and rescue network according to claim 1, is characterized in that, the step that the determination in step 2 can receive the next base station category node of described fire-fighting data waiting for transmission comprises:
Steps A 1, signalization intensity threshold;
Steps A 2, by calculating signal strength signal intensity, obtaining and can cover all base stations category node of described wireless sensing unit;
Steps A 3, obtain all base stations category node in, the base station category node selecting wherein signal strength signal intensity to be greater than described signal strength threshold is used as both candidate nodes, and base station category node maximum for signal strength signal intensity in described both candidate nodes is defined as the next base station category node that can receive described fire-fighting data waiting for transmission;
Wherein, when there is not described both candidate nodes in all base stations category node obtained, abandoning described fire-fighting data waiting for transmission and terminating route.
3. the method for routing for fire-fighting and rescue network according to claim 1, it is characterized in that, when the node type of the described next base station category node determined in step 2 is relay base station, the step in the transistroute path of described acquisition from this node to fire fighting command car comprises:
Step B1, bandwidth capacity threshold value and network maximum bandwidth capacity are set;
Step B2, according to the relay base station quantity in described network maximum bandwidth capacity, described fire-fighting and rescue network and fire fighting command car quantity, by to the relay base station in described fire-fighting and rescue network and fire fighting command car mean allocation bandwidth, obtain node maximum bandwidth capacity;
Step B3, obtain Optimization route path from described next base station category node to fire fighting command car by following process:
Obtain the institute's likely routed path from described next base station category node to the fire fighting command car that may arrive, wherein, using the described fire fighting command car that may arrive as destination node,
Calculate from described next base station category node to the distance of described destination node in every bar possibility routed path, and by all distances of calculating according to sorting from small to large,
Institute after sequence is likely in routed path, the routed path of " the remaining bandwidth capacity received after described fire-fighting data waiting for transmission is more than or equal to described bandwidth capacity threshold value " of satisfying condition first is defined as described Optimization route path, using as described transistroute path; Wherein, when likely there is not the routed path of satisfy condition " the remaining bandwidth capacity received after described fire-fighting data waiting for transmission is more than or equal to described bandwidth capacity threshold value " in routed path time, abandon described fire-fighting data waiting for transmission and terminate route.
4. the method for routing for fire-fighting and rescue network according to claim 3, is characterized in that, the acquisition in step B3 from described next base station category node to the fire fighting command car that may arrive the step of likely routed path comprise:
Step C1, jumping figure threshold value is set;
Step C2, using described next base station category node as initiation node, by described initiation node to the base station category node broadcast signal adjacent with described initiation node;
Step C3, receive the base station category node of route signal of described initiation node to described initiation node reverts back answer signal;
Step C4, described initiation node judge whether receive answer signal within a time cycle:
If judged result is "No", then returns and perform step C2;
If judged result is "Yes", then perform step C5;
Step C5, the response node at answer signal place received by described initiation node add routing table entry;
Whether step C6, the type judging this response node are " fire fighting command car ": if the type of this response node is not " fire fighting command car ", perform step C7; Otherwise, perform step C14;
Whether step C7, judgement " i+1<=jumping figure threshold value " set up, and when " i+1<=jumping figure threshold value " is set up, perform step C8; Otherwise, perform step C14;
Step C8, not that the response node of " fire fighting command car " is defined as i-th of described initiation node and jumps off trip and initiate node by being judged as in step C6; Wherein, the initial value of i is 1;
Step C9, each i-th jumps off trip and initiates node broadcasts route signal, receives this and i-th jumps off base station category node that trip initiates the route signal of node and i-th jump off trip to this and initiate node reverts back answer signal;
Step C10, each i-th jumps off trip initiation node and judges whether receive answer signal within a time cycle: if judged result is "No", then perform step C11; Otherwise, perform step C12;
Step C11, terminate route signal to described initiation node reverts back, this i-th is jumped off trip and initiates node and delete from routing table receiving after this terminates route signal by described initiation node, and process terminates;
Step C12, this i-th is jumped off base station category node that trip initiates non-initiation node corresponding to the answer signal that receives of node and be defined as i-th+1 and jump off trip and initiate node, and jump off determine all i-th+1 trip initiate node be transmitted to described initiation node, described initiation node jump off all i-th+1 trip initiate node add routing table entry;
Step C13, described initiation node judge that all i-th+1 jumps off trip and initiate whether to include the node that type is " fire fighting command car " in node: if all i-th+1 jumps off trip to initiate containing type in node be the node of " fire fighting command car ", execution step C14; Otherwise, perform step C15;
Step C14, the node being " fire fighting command car " by described type are defined as destination node, and obtain all routed paths from described initiation node to each destination node, and terminate route, process terminates;
Step C15, make i'=i+1, and the value of i is updated to the value of current i', judge whether " current i'<=jumping figure threshold value " is set up: if set up, return and perform step C10; Otherwise process terminates.
5. the method for routing for fire-fighting and rescue network according to claim 1, is characterized in that, the data transmission method based on balance network load in step 3, the step transmitting described fire-fighting data waiting for transmission according to described final route path comprise:
Step D1, average transmission rate is set;
Step D2, the video in described fire-fighting data waiting for transmission, voice data to be compressed;
Step D3, burst process or network code process are carried out to current fire-fighting data waiting for transmission;
Step D4, adopt the mode of breakpoint transmission to transmit burst process or network code process successively after fire-fighting data.
6. the method for routing for fire-fighting and rescue network according to claim 5, it is characterized in that, step D3 comprises:
Step D31, described average transmission rate is designated as SendRate, the data volume of described fire-fighting data waiting for transmission is designated as DataNum as the data volume of current data packet, judges the magnitude relationship between DataNum and SendRate;
If step D32 DataNum < SendRate, obtain after current data packet is summed up calculating with the proximity data bag of reading current data packet with its close on packet be added after total amount of data DataPlusNum, until
till,
be the change for data volume after network code and reserved amount,
Wherein,
Wherein, DataNum
h(h=1,2, k) data volume of h proximity data bag of current data packet is represented, k is the number of proximity data bag, encodes to found k proximity data bag and current data packet application random network code method, obtains the packet after coding, wherein, following header information is increased in the head of packet in encoded: the forward node list that the IP address of the numbering of process mark, packet, coding vector, source node and fire fighting command car node and participating in sends;
If step D33 DataNum > is SendRate, carries out subpackage process, obtain multiple subdata bag to described fire-fighting data waiting for transmission, the subpackage number DataPartNum in described subpackage process performs according to following formula,
DataPartNum＝(DataNum+η)/SendRate，
Wherein, η is expressed as the change of data volume after data subpackage process and reserved amount, and each subdata bag after subpackage process increases following header information: the forward node list that the IP address of the numbering of process mark, packet, source node and fire fighting command car node and participating in sends.
7. the method for routing for fire-fighting and rescue network according to claim 5, is characterized in that, after step D4, also comprises the steps:
If step e 1 receiving node is fire fighting command car, described receiving node is handled as follows:
When received packet is through the packet of network code, received packet is decoded, to obtain raw data packets according to header information; When received packet is through the packet of subpackage process, received packet is merged, to restore raw data packets according to header information;
When received packet be video or voice data time, reverse decoding is carried out to this packet, to reduce initial data;
Step e 2, after described receiving node successfully receives data, in relevant base station category node, delete corresponding routed path record.
8. the method for routing for fire-fighting and rescue network according to claim 1, is characterized in that,
The node type of the described next base station category node determined in step 2 is fire fighting command car, the fire-fighting data of described initiation node are directly transferred to described destination node, and are stored in the memory of described destination node;
The node type of the described next base station category node determined in step 2 is relay base station, timing by the transfer of data of fire fighting command car to described fire-fighting and rescue command centre, transmitting procedure is as follows: after the time interval to be polled arrives, traversal fire fighting command car, to described fire-fighting and rescue command centre transmit each fire fighting command car receive and the fire-fighting data stored, and these fire-fighting data to be stored in the memory of described fire-fighting and rescue command centre.
9. communication device, is characterized in that, described communication device comprises wireless sensing unit (1) and wireless coverage and trunking (2);
Described wireless sensing unit (1) comprises power supply unit (110), general data collecting device (120), video/audio data acquisition equipment (130), general data process chip (140), video/audio data processing chip (150), signal strength signal intensity calculating module (160) and radio receiving transmitting module (170);
Described general data collecting device (120) comprises personnel's three-dimensional position identifier (121), heartbeat sensor (122), Smoke Sensor (123), temperature sensor (124) and thermal imaging apparatus (125);
Described video/audio data acquisition equipment (130) comprises video/audio transducer (131);
Described general data process chip (140) comprises the first Signal-regulated kinase (141), the first data acquisition module (142) and the first Data Analysis Services module (143); Described general data collecting device (120) is connected with described first Signal-regulated kinase (141) and carries out signal condition, described first Signal-regulated kinase (141) is connected with described first data acquisition module (142), described first data acquisition module (142) is connected with described first Data Analysis Services module (143), described first Data Analysis Services module (143) calculates module (160) with described signal strength signal intensity and is connected, and described first Data Analysis Services module (143) comprises the first reseting module (143-1);
Described video/audio data processing chip (150) comprises secondary signal conditioning module (151), the second data acquisition module (152) and the second Data Analysis Services module (153); Described video/audio data acquisition equipment (130) is connected with described secondary signal conditioning module (151) and carries out signal condition, described secondary signal conditioning module (151) is connected with described second data acquisition module (152), described second data acquisition module (152) is connected with described second Data Analysis Services module (153), described second Data Analysis Services module (153) calculates module (160) with described signal strength signal intensity and is connected, and described second Data Analysis Services module (153) comprises the second reseting module (153-1);
Described general data collecting device (120), described video/audio data acquisition equipment (130), described general data process chip (140) and described video/audio data processing chip (150) are powered by described power supply unit (110) respectively;
Described wireless coverage and trunking (2) comprise 350M overlay router (210) and 5.8G relay router (220), and described 5.8G relay router (220) comprises routing calculation module (221) and data transmission module (222); Two-way communication can be carried out between described 350M overlay router (210) and described 5.8G relay router (220); Described routing calculation module (221) carries out the router-level topology of transfer of data, and described data transmission module (222) wirelessly carries out communication with other base stations; Wherein, described 350M overlay router (210) is for covering the node around it, and described 5.8G relay router (220) is for transmitting data to other base station category nodes;
350M overlay router (210) the wirelessly communication of the radio receiving transmitting module (170) of described wireless sensing unit (1) and described wireless coverage and trunking (2);
Wherein, the base station category node in described communication device comprises relay base station, fire fighting command car and fire-fighting and rescue command centre, is equipped with described wireless coverage and trunking (2) in the category node of each base station.
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| CN105636149A (en) * | 2016-01-25 | 2016-06-01 | 北京小米移动软件有限公司 | Relay method and device and system |
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