CN102695204A - Business control method used in industrial wireless network, and system thereof - Google Patents
Business control method used in industrial wireless network, and system thereof Download PDFInfo
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Abstract
The invention relates to a business control method used in an industrial wireless network. The industrial wireless network comprises a business control server and a plurality of local area networks. Each local area network comprises a sink node and a plurality of wireless terminals. The method comprises that the plurality of wireless terminals in each local area network periodically report terminal characteristic information to the business control server through the sink node of the corresponding local area network. According to the terminal characteristic information, the business control server selects one wireless terminal from the plurality of wireless terminals as the routing node of the local area network. A distance vector routing algorithm is operated in the routing node to obtain the network topology information of the local area network. The routing node reports the network topology information of the local area network to the business control server. The business control server carries out merging of the network topology information of the plurality of local area networks, thereby obtaining the network topology information of the industrial wireless network and carrying out data processing according to initiated business types.
Description
Technical field
The present invention relates to the industrial wireless communication field, particularly be applicable to the service control method and the system of wireless industrial grid network.
Background technology
At present, along with the develop rapidly of the communication technology, promoted the continuous progress in fields such as industry monitoring, control, detection.In recent years, as a kind of industrial communication means, wireless technology has obtained swift and violent development, becomes the growth point in industrial communication market, has caused more and more many people's concern.Than cable technology, wireless technology has following advantage: cost is practiced thrift in (1), and it is convenient to set up.The foundation of wire communication must be passed through physical link, and the layout cable is wasted time and energy, sometimes, because the particularity in some industrial environment (like HTHP) and geographical position (as through lake, forest zone etc.) thereof is difficult for wiring.Even after building up, also subject to be struck by lightning, the corrosion of environment and nibbling of mouse worm; In case be out of order, not only easy-to-search not repairs also very inconvenient.Comparatively speaking, wireless technology will be many easily, need not wiring, and failure diagnosis also is easy to, and can carry out remote diagnosis by network.(2) append node, autgmentability is strong.After a communication network was built up, often because certain reason increases new device node, if adopt wired mode will append wiring, more opposite extreme situations possibly destroyed original communication link.But, if adopt wireless networking, just can be on the basis of existing wireless network, (Wireless Access Point WAP), revises the purpose that a spot of software setting just can reach expanding node to increase WAP.(3) move flexibly, unrestricted.For the node of industry wireless network, as long as it can carry out the function of oneself, can be placed into certain industry zone to node Anywhere, physics moves very big freedom.(4) anti-interference strong, safe and reliable.Wireless technology has the security protocol of oneself, and unique AES is arranged, and difficult quilt is eavesdropped; Owing to adopted spread spectrum or frequency hopping, have good anti-interference, this is very important in abominable industrial environment.Based on above-mentioned various advantages, wireless technology has caused more for paying close attention to widely at industrial circle.In these technology, Zigbee and UWB are undoubtedly the most dazzling two.
Zigbee be a kind of closely, low complex degree, low-power consumption, low data rate, two-way wireless communication technology cheaply, mainly be applicable to automatic control and remote control field, for Wireless Networking and the control of satisfying small inexpensive equipment are formulated.Zigbee is the trade name of IEEE 802.15.4 technology.This technological core protocol is formulated by the IEEE 802.15.4 working group that sets up in December, 2000, and higher layer applications, interconnect test and marketing are responsible for by Zigbee alliance.Zigbee alliance is found in August calendar year 2001, comprises the famous enterprise of over one hundred family of Britain InveNSys company, Mitsubishi electric corporation, U.S. Motorola Inc. and Dutch Philips Semiconductor Co., Ltd. etc. at present.
Along with transducer and development of Communication Technique, wireless sensor network (Wireless sensor networks, be rooted in the hearts of the people by notion WSN).Zigbee has beyond challenge advantage in the application of wireless sensor network.Wireless sensor network is exactly the network system by the self-organizing that is deployed in the multi-hop that cheap microsensor nodes a large amount of in the monitored area forms, forms through communication, but has monitoring high accuracy, high fault tolerance, numerous advantages such as overlay area remote monitoring greatly.WSN can be applicable to industrial automation, equipment fault diagnosis, adverse circumstances production process monitoring etc.The primary goal of wireless sensor network design is the efficient utilization of the energy, that is to say, and under the situation that guarantees normal monitoring function, the energy of the least possible consumption node, the life cycle that prolongs network.In this, it is identical with the design object of Zigbee.Secondly.Sensor network requires the cost of each node low as much as possible, and only in this way, a network just possibly have many nodes, under the situation that individual nodes lost efficacy, can plan route rapidly again, is unlikely making network paralysis.Moreover the Zigbee network can hold more than 65000 node simultaneously, is enough to guarantee the multi-source data collection.
A sensor network generally includes sensor node, WAP and management node.Sensor node is made up of sensor assembly, processor module, wireless communication module and energy supply module 4 parts usually, is a miniature embedded system, and it takes into account the terminal and the router dual-use function of legacy network node.
WAP connects sensor network and external network, realizes the communication Protocol Conversion between two kinds of protocol stacks, the monitoring task of while release management node, and a data forwarding of collecting is to external network.The user is configured and manages sensor network through management node, issue monitoring task and collection Monitoring Data.Structure to sensor network; Can utilize the Zigbee node to make the sensor node of whole network; In whole monitored area, constitute a Zigbee network, the embedded Zigbee protocol stack of each sensor node is realized basic Zigbee network function; Give WAP with the data passes that collects, and accept WAP its assigning of task and order.Utilize a microprocessor+GPRS module to make WAP,, realize agreements such as TCP/UDP in order to connect sensor network and GPRS network; Packing data is encapsulated framing; Pass to main control room through GPRS network, and, convey to sensor node the order decapsulation of main control end.Do hardware platform in GPRS module of user's termination and PC server, software comprises database etc., the data of receiving is analyzed, and whole network is managed.
The characteristics of Zigbee self have determined it can only be applied in the occasion of short distance low speed, and in industry monitoring, having what need many time is real-time image, and this just needs the high-speed data transmission rate, and obviously, in this, Zigbee has fatal defective.The appearance of UWB technology makes this application demand become possibility.
UWB (UltraWide Band, ultra broadband) is a kind of with the carrierfree communication technology of the very low impulse of duty ratio as information carrier.FCC (FCC) regulation, the frequency range that the UWB communication system adopts is 3.1～10.6GHz, can guarantee that so existing GPRS, cellular system are not disturbed.UWB and traditional maximum difference of the communication technology are: ultra broadband depends on pulse train and transmits information, and it is modulated to information on the discrete pulse signal, directly launches burst pulse then and communicates; Traditional communication technology then adopts the logical carrier modulation of band, and it is moved the waveform that contains information on the corresponding sinusoidal carrier and launches.So ultra broadband is called base band (baseband) transmission technology or carrierfree (carrier-free) transmission technology again.
Since the ultrabroad band of several GHz of ultra broadband, so compared with other traditional wireless communication technologys, super-broadband tech has following advantage:
(1) antijamming capability is strong.When UWB transmits with faint wireless pulse signals disperse in broad frequency band, power output is very little, and because it is different with present communication system working frequency range, does not disturb mutually.
(2) transmission rate is high.Message transmission rate can reach tens to hundreds of Mb/s.
(3) consumed energy is few.Owing to do not use carrier wave, only when the emission burst pulse, consume less energy, thereby practiced thrift the mass energy consumption when emission continues carrier wave.
(4) fail safe is good.Owing to adopt the THSS technology, receiver just can solve the emission data when having only known transmitting terminal spreading code, and the transmit power spectral density of system is extremely low, can't receive with traditional receiver.
(5) accurate localization ability.The UWB system possesses good time resolution ability, can find range accurately and locate.Because UWB also has extremely strong penetration capacity, can be in indoor and underground accurate location.
The communication distance of UWB is considered its traffic rate up to hundreds of Mb/s within 10m, it is specially adapted to the low coverage high-speed data transmission, realizes the Wireless USB scheme.In the industrial automation field, as measuring, detecting in (underground object detection) and can be widely used.
What many aspects such as commercial production, detection, monitoring needed is real-time image and sound; And image and digitized voice data amount are very big; The real-time video that is 24/pixel with one 640 * 480 resolution, color is an example, and its image data amount is the 7.37Mb/ frame, and data transmission rate is 184Mb/s; Obviously, so big data transfer rate is that many wireless technologys can't be accomplished.Therefore, in practical application, can be at microprocessor of camera termination; Realtime graphic is carried out simple processed compressed, after treatment, can data rate request be dropped to tens Mb/s; Utilize the UWB technology then, view data is sent to the central control room over several meters.Remote monitoring if desired can be connected with other networks through LAN with remote port at central control room.
Summary of the invention
According to an aspect of the present invention; A kind of service control method that is used for industry wireless network is provided; Said industry wireless network comprises service control server and a plurality of Local Area Network, and each Local Area Network comprises an aggregation node and a plurality of wireless terminal, and said method comprises:
A plurality of wireless terminals in each Local Area Network periodically report service control server with terminal characteristic information via the aggregation node of region network, and said terminal characteristic information comprises: the transmission delay between the aggregation node of terminal processing capacity, terminate load state, the predetermined line duration in terminal and wireless terminal and its region network;
Service control server selects a wireless terminal as the routing node in the Local Area Network from a plurality of wireless terminals according to terminal characteristic information;
Range ability vector routing algorithm is to obtain the network topological information of Local Area Network on routing node; Routing node reports service control server with the network topological information of said Local Area Network; The network topological information of said Local Area Network comprises physical distance and the transmission delay between each wireless terminal and the routing node at least, thereby by service control server the network topological information of a plurality of Local Area Networks is merged the network topological information that obtains industry wireless network;
The type of the definite business that will initiate of wireless terminal, if professional type is speech business, then wireless terminal is directly initiated voice service request to aggregation node;
If professional type is data service; Whether the data volume that the data service that further judgement is asked relates to is less than predetermined threshold; If then wireless terminal sends data service request to aggregation node, described request is forwarded to the Internet and receives the data service asked from the Internet by aggregation node; The data that the data service of being asked is relevant send to the wireless terminal of initiation request, and on the metadata cache routing node that the data service of being asked is relevant;
If related data volume is more than or equal to predetermined threshold; Then wireless terminal sends data service request to routing node; The data whether routing node confirms to exist on the routing node wireless terminal of initiation request to ask; If have the data that the wireless terminal of said initiation request is asked on the routing node, then routing node directly sends to said business datum the wireless terminal of said initiation request; Otherwise; The data whether routing node confirms to exist on other wireless terminal in the Local Area Network wireless terminal of initiation request to ask; If have the data that the wireless terminal of said initiation request is asked on another wireless terminal in the Local Area Network; Then routing node is transmitted to said another wireless terminal with data service request, the data of being asked is sent to the wireless terminal of initiation request by said another wireless terminal;
If all there are not the data of being asked on the routing node or on other wireless terminal in the Local Area Network; Then routing node is forwarded to aggregation node with data service request; The content server of aggregation node from the Internet obtains data; And said data are sent to routing node, the metadata cache that the data service of being asked is relevant is given the wireless terminal of initiation request on routing node and with data forwarding; Service control server is that said business datum is added indication information, and said indication information shows that routing node should store the shortest time of said business datum, and routing node is stored the said shortest time at least with said business datum.
Preferably; Also comprise following alternative method: when said routing node receives the data service request of wireless terminal; Routing node judges that according to the topology information of Local Area Network whether distance between said wireless terminal and the aggregation node is less than the distance between routing node and the aggregation node; If; Then routing node is to wireless terminal transmission range information; Said range information comprises distance between indication wireless terminal and the aggregation node less than the information of the distance between routing node and the aggregation node, and wireless terminal is the transmission delay of measurement and aggregation node and routing node respectively, is connected and directly connects being connected of aggregation node or maintenance and routing node according to transmission delay and the definite disconnection of range information and routing node; If wherein wireless terminal directly connects aggregation node, then said wireless terminal directly is sent to voice service request and/or data service request aggregation node and does not send to routing node.
Preferably; Wherein need transmit and need carry out encrypted transmission the time through routing node when the related data of data service; Wireless terminal is set up via aggregation node and is connected with the interim of service control server, and service control server is wireless terminal distribution dynamic key and the corresponding relation of on said aggregation node, storing wireless terminal and dynamic key; At uplink direction; Wireless terminal is encrypted and will be passed through ciphered data according to dynamic key to its data that will send and sends routing node to; Be transmitted to aggregation node with said through ciphered data by routing node again, and decipher by aggregation node; And in the down link direction; When the destination of the data of finding to transmit when aggregation node is said wireless terminal; Aggregation node utilizes dynamic key that said data are encrypted; And will pass through ciphered data and send routing node to, be transmitted to wireless terminal by routing node, wireless terminal to the data deciphering to obtain data decryption.
Preferably; Wherein service control server is being provided with the host node unit and on each of said a plurality of wireless terminals, is being provided with from node unit on the routing node; When service control server need be carried out emergency treatment; Alarm information is sent to the host node unit in the routing node; The host node unit be used for wireless terminal on communicate from node unit, at least one operating below coming wireless terminal carried out according to the interface that provides from node unit: the display device at wireless terminal shows instant message; Make wireless terminal preserve the state of the business datum of sending/receiving; To be transferred to another wireless terminal with relevant state and the data of processing carried out on the said wireless terminal; Close the wireless device of wireless terminal.
Preferably; When first wireless terminal in a plurality of wireless terminals is wanted to visit the application on second wireless terminal; Between first wireless terminal and second wireless terminal, set up wireless connections, first wireless terminal sends terminal identifier to service control server, and service control server generates first verify data according to terminal identifier; Second wireless terminal sends the identifier of said application to service control server; Service control server generates second verify data according to the identifier of said application, and service control server sends to second wireless terminal with first verify data, and second verify data is sent to first wireless terminal; Second wireless terminal confirms that according to first verify data whether first wireless terminal is through authentication; And first wireless terminal according to second verify data confirm the application that will visit whether through authentication, if all through authentication, then two wireless terminals of service control server mandate carry out direct communication.
According to a further aspect in the invention; A kind of service control system that is used for industry wireless network is provided, and said industry wireless network comprises service control server and a plurality of Local Area Network, and each Local Area Network comprises an aggregation node and a plurality of wireless terminal; It is characterized in that
Wireless terminal; Periodically terminal characteristic information is reported service control server via the aggregation node of region network, said terminal characteristic information comprises: the transmission delay between the aggregation node of terminal processing capacity, terminate load state, the predetermined line duration in terminal and wireless terminal and its region network;
Service control server selects a wireless terminal as the routing node in the Local Area Network from a plurality of wireless terminals according to terminal characteristic information; And
Range ability vector routing algorithm is to obtain the network topological information of Local Area Network on routing node; Routing node reports service control server with the network topological information of said Local Area Network; The network topological information of said Local Area Network comprises physical distance and the transmission delay between each wireless terminal and the routing node at least, thereby by service control server the network topological information of a plurality of Local Area Networks is merged the network topological information that obtains industry wireless network;
Aggregation node is used to receive the voice and/or the data service request of wireless terminal, and is used to transmit data;
Wherein, the type of the definite business that will initiate of wireless terminal, if professional type is speech business, then wireless terminal is directly initiated voice service request to aggregation node;
If professional type is data service; Whether the data volume that the data service that further judgement is asked relates to is less than predetermined threshold; If then wireless terminal sends data service request to aggregation node, described request is forwarded to the Internet and receives the data service asked from the Internet by aggregation node; The data that the data service of being asked is relevant send to the wireless terminal of initiation request, and on the metadata cache routing node that the data service of being asked is relevant;
If related data volume is more than or equal to predetermined threshold; Then wireless terminal sends data service request to routing node; The data whether routing node confirms to exist on the routing node wireless terminal of initiation request to ask; If have the data that the wireless terminal of said initiation request is asked on the routing node, then routing node directly sends to said business datum the wireless terminal of said initiation request; Otherwise; The data whether routing node confirms to exist on other wireless terminal in the Local Area Network wireless terminal of initiation request to ask; If have the data that the wireless terminal of said initiation request is asked on another wireless terminal in the Local Area Network; Then routing node is transmitted to said another wireless terminal with data service request, the data of being asked is sent to the wireless terminal of initiation request by said another wireless terminal;
If all there are not the data of being asked on the routing node or on other wireless terminal in the Local Area Network; Then routing node is forwarded to aggregation node with data service request; The content server of aggregation node from the Internet obtains data; And said data are sent to routing node, the metadata cache that the data service of being asked is relevant is given the wireless terminal of initiation request on routing node and with data forwarding; Service control server is that said business datum is added indication information, and said indication information shows that routing node should store the shortest time of said business datum, and routing node is stored the said shortest time at least with said business datum.
Preferably; Wherein when said routing node receives the data service request of wireless terminal; Routing node judges that according to the topology information of Local Area Network whether distance between said wireless terminal and the aggregation node is less than the distance between routing node and the aggregation node; If; Then routing node is to wireless terminal transmission range information; Said range information comprises distance between indication wireless terminal and the aggregation node less than the information of the distance between routing node and the aggregation node, and wireless terminal is the transmission delay of measurement and aggregation node and routing node respectively, is connected and directly connects being connected of aggregation node or maintenance and routing node according to transmission delay and the definite disconnection of range information and routing node; If wherein wireless terminal directly connects aggregation node, then said wireless terminal directly is sent to voice service request and/or data service request aggregation node and does not send to routing node.
Preferably; Wherein need transmit and need carry out encrypted transmission the time through routing node when the related data of data service; Wireless terminal is set up via aggregation node and is connected with the interim of service control server, and service control server is wireless terminal distribution dynamic key and the corresponding relation of on said aggregation node, storing wireless terminal and dynamic key; At uplink direction; Wireless terminal is encrypted and will be passed through ciphered data according to dynamic key to its data that will send and sends routing node to; Be transmitted to aggregation node with said through ciphered data by routing node again, and decipher by aggregation node; And in the down link direction; When the destination of the data of finding to transmit when aggregation node is said wireless terminal; Aggregation node utilizes dynamic key that said data are encrypted; And will pass through ciphered data and send routing node to, be transmitted to wireless terminal by routing node, wireless terminal to the data deciphering to obtain data decryption.
Preferably; Wherein service control server is provided with the host node unit and on each of said a plurality of wireless terminals, is provided with from node unit being provided with on the routing node; When service control server need be carried out emergency treatment; Alarm information is sent to the host node unit in the routing node; The host node unit be used for wireless terminal on communicate from node unit, at least one operating below coming wireless terminal carried out according to the interface that provides from node unit: the display device at wireless terminal shows instant message; Make wireless terminal preserve the state of the business datum of sending/receiving; Close the wireless device of wireless terminal.
Preferably; When first wireless terminal in a plurality of wireless terminals is wanted to visit the application on second wireless terminal; Between first wireless terminal and second wireless terminal, set up wireless connections, first wireless terminal sends terminal identifier to service control server, and service control server generates first verify data according to terminal identifier; Second wireless terminal sends the identifier of said application to service control server; Service control server generates second verify data according to the identifier of said application, and service control server sends to second wireless terminal with first verify data, and second verify data is sent to first wireless terminal; Second wireless terminal confirms that according to first verify data whether first wireless terminal is through authentication; And first wireless terminal according to second verify data confirm the application that will visit whether through authentication, if all through authentication, then two wireless terminals of service control server mandate carry out direct communication.
Through the following detailed description that provides, the further range of application of the present invention can become obvious.Yet, it is understandable that the detailed description and the special-purpose instance of the indication preferred embodiment for the present invention only provide with the mode of explaining, to those skilled in the art, variations and modifications within the spirit and scope of the present invention all are tangible.
Description of drawings
Fig. 1 is the sketch map according to the industry wireless network of prior art;
Fig. 2 is the sketch map according to the service control system that is used for industry wireless network of embodiment of the present invention; And
Fig. 3 is the flow chart according to the service control method that is used for industry wireless network of embodiment of the present invention.
It should be noted that structure and/or material that these accompanying drawings are intended to the general characteristic of describing method, use in certain exemplary embodiments, and be intended to the following description that provides is replenished.Yet these accompanying drawings are not pro rata, and neither accurately reflect the fine structure or the performance characteristics of the execution mode that provides arbitrarily, and should not be construed as through illustrative embodiments yet number range or the attribute that is comprised defined or limit.
Embodiment
Although illustrative embodiments can be carried out various modifications and adopted alternative form, its execution mode provides as embodiment in the accompanying drawings, and will here be described in detail.Yet, should be understood that should illustrative embodiments be defined as particular forms disclosed, on the contrary, illustrative embodiments is intended to contain and falls into right and will remove all modifications, equivalent and substitute in the scope.In the description of whole accompanying drawing, identical Reference numeral is represented identical element.
It is understandable that although first, second grade that possibly use a technical term is described various elements, these elements should not limited by these terms here.These terms only are used for an element is distinguished with another element mutually.For example, under the situation that does not depart from the illustrative embodiments scope, first element also can be described as second element, and similarly, second element also can be described as first element.As used herein, term " and/or " comprise one or more relevant projects of listing arbitrarily with all combinations.It is understandable that,, perhaps can have element between wherein when relating to that an element " is connected " with another element or when " coupling ", it can directly be connected with other element or be coupled.On the contrary, when relating to that an element " directly is connected " with another element or when " directly coupling ", the element between wherein not then.Other speech that is used for concerning between the descriptive element should make an explanation in an identical manner (for example, " and ... between " with " and directly exist ... between ", " adjacent " and " direct neighbor " etc.).
Term used herein only is used to describe specific implementations, and is not intended to illustrative embodiments is limited.As used herein, singulative " ", " one " and " said " also are intended to comprise plural form, only if in context, indicate clearly.Can also further be understood that; Term used herein " comprises ", " by ... form ", " comprising " and/or " containing " explain characteristic, integral body, step, operation, element and/or the element that has defined, but does not repel existence or increase one or more further features, integral body, step, operation, element, element and/or its combination.
Need to prove that also in some interchangeable implementations, related function/action can also take place according to the order that does not relate among the figure.For example,, in fact can carry out concomitantly, or carry out with opposite order sometimes with two figure shown in the continuation mode according to related function/action.
Only if special the qualification, all terms used herein (comprising technology and scientific terminology) are identical with the implication of the those of ordinary skill common sense of the affiliated technical field of illustrative embodiments.Can also further be understood that, should be interpreted as with they implications in the context of association area consistently such as the term that limits with general dictionary, and be not interpreted as idealized or excessive formal implication, here only if limit especially.
Execution mode below in conjunction with concrete is elaborated to the present invention:
As shown in Figure 1, in the industry wireless network 100 of prior art, comprise a plurality of Local Area Networks 101.For the sake of clarity, only show a Local Area Network in this execution mode.Preferably, each Local Area Network 101 comprises a plurality of wireless terminals, for example wireless terminal 111, wireless terminal 112, wireless terminal 113, wireless terminal 114 and wireless terminal 115.Preferably, each wireless terminal all sends and receives information through Radio Link.Preferably, said Local Area Network also comprises aggregation node 102, and said aggregation node can serve as the interface between Local Area Network and the external network.Preferably, said aggregation node serves as the transit node between Local Area Network and the external network.On the one hand, aggregation node can receive the voice/data request of wireless terminal, and the voice/data request is forwarded to external network; On the other hand, aggregation node can be transmitted to the wireless terminal in the Local Area Network with the control command or the access request of external network, thereby realizes the visit of external network to wireless terminal.Outside at industry wireless network also comprises external network 101, and external network can for example be an Internet, externally can comprise content server in the network, its provide wireless terminal the data content that will visit.Said wireless terminal can be portable terminal, mobile phone, PDA etc., also can be wireless senser, for example RFID equipment etc.
In the industry wireless network in the prior art, the connection between a plurality of wireless terminals is irregular.As shown in Figure 1, wireless terminal 111 respectively at wireless terminal 112 be connected with 114, wireless terminal 112 is connected with 113 with wireless terminal 111 respectively, wireless terminal 113 is connected with 114 with wireless terminal 112 respectively, wireless terminal 114 is connected with 115 with wireless terminal 113 respectively and wireless terminal 115 is connected with wireless terminal 114.Because the erratic behavior that connects causes when confirming network topology, need spending more time.In addition, when deviated from network in 115 of wireless terminal 111, for example wireless terminal 113, possibly produce the fail data relevant with wireless terminal 113.For example; Wireless terminal 113 carried out data interaction with wireless terminal 112 before deviated from network; For example in the memory of wireless terminal 112, write data, the inefficacy of wireless terminal 113 possibly cause dirty data occurring in the wireless terminal 112, for example writes data and proceeds to a half and stop.In addition, when hot spot data occurring, all wireless terminals all through aggregation node to the said hot spot data of outside network requests, and, may cause the not response of request of wireless terminal because the aggregation node disposal ability can't satisfy when visiting simultaneously in a large number.If the request of wireless terminal is urgent voice call request, then may cause tremendous loss.
In addition, because the interior all wireless terminals of Local Area Network all send voice and/or data service request through the aggregation node of said regional network, and send data to external network and/or receive data from external network through aggregation node.So, can cause the congested of aggregation node usually like this, especially when hot spot data occurring in the network, the congestion situation of aggregation node is especially serious.Therefore, need select a wireless terminal in a plurality of wireless terminals in Local Area Network, make it as routing node.Preferably, said routing node cushions the for example data of hot spot data, with other wireless terminals in Local Area Network data access in the zone is provided.
And, in present prior art, voice service request and data service request are not distinguished.Normally, the voice service request transfer of data real-time of having relatively high expectations, lower transmission delay etc.Data service request requires the lower transfer of data real-time of data, allows the transmission delay higher than voice service request usually.In addition, data service request possibly require to take a large amount of bandwidth sometimes and transmits lot of data.Therefore, if voice service request is carried out identical processing with data service request, might cause voice service request so congested, thereby cause in some emergencies, can't guaranteeing the conversation of wireless terminal.
Fig. 2 is the sketch map according to the service control system that is used for industry wireless network of embodiment of the present invention.Industry wireless network comprises a plurality of Local Area Networks 201.For the sake of clarity, only show a Local Area Network in this execution mode.Preferably, each Local Area Network 201 comprises a plurality of wireless terminals, for example wireless terminal 211, wireless terminal 212, wireless terminal 213, wireless terminal 214 and wireless terminal 215, and wherein each wireless terminal all sends and receives information through Radio Link.Preferably, said Local Area Network also comprises aggregation node 102, and said aggregation node serves as the interface between Local Area Network and the external network.On the one hand, aggregation node can receive the voice/data request of wireless terminal, and the voice/data request is forwarded to external network; On the other hand, aggregation node can be transmitted to the wireless terminal in the Local Area Network with the control command or the access request of external network, thereby realizes the visit of external network to wireless terminal.Outside at industry wireless network also comprises external network, and external network can for example be an Internet, externally comprises content server in the network, its provide wireless terminal the data content that will visit.Said wireless terminal can be portable terminal, mobile phone, PDA etc., also can be wireless senser, for example RFID equipment etc.
According to preferred implementation of the present invention; Wireless terminal 211, wireless terminal 212, wireless terminal 213, wireless terminal 214 and wireless terminal 215 in the Local Area Network 201 periodically reports service control server with terminal characteristic information via the aggregation node 202 of region network, and said terminal characteristic information comprises: the transmission delay between the aggregation node of terminal processing capacity, terminate load state, the predetermined line duration in terminal and wireless terminal and its region network.Preferably, disposal ability can be the ability of wireless terminal deal with data, for example the power of the capacity of the dominant frequency of CPU, memory and radio transmitter, radio receiver and/or wireless set.Preferably, load condition can be the present rest processing capacity of wireless terminal, or the disposal ability that has taken, task load capacity etc.Preferably, predetermined line duration is that wireless terminal can keep the online time, for example 3 hours, 1 day, 5 days etc.In line duration, said wireless terminal can receive the voice/data traffic request, can carry out data forwarding, can carry out the forwarding of data service request etc.Wireless terminal periodically measure and the aggregation node of its region network between transmission delay, for example 0.01 second etc.Wireless terminal sends said transmission delay to aggregation node.
Transmission delay between the aggregation node of the terminal processing capacity that service control server reports according to wireless terminal 211, wireless terminal 212, wireless terminal 213, wireless terminal 214 and wireless terminal 215, terminate load state, the predetermined line duration in terminal and wireless terminal and its region network from a plurality of wireless terminals, selects a wireless terminal as the routing node in the Local Area Network.The transmission delay of disposal ability, load condition, predetermined line duration and wireless terminal and aggregation node that thus, service control server can be through wireless terminal comes from a plurality of wireless terminals wireless terminal of selection as the routing node in the Local Area Network.In this execution mode, wireless terminal 211 is elected to be routing node, it receives voice/data traffic request, can carry out data forwarding, can carry out the forwarding of data service request, can data cached service request related data etc.
Range ability vector routing algorithm is to obtain the topology information of Local Area Network on routing node; The topology information of Local Area Network is reported service control server; Comprise physical distance and transmission delay between wireless terminal and the routing node in the topology information of said Local Area Network, obtain whole network topological information thereby the topology information of above-mentioned zone network is merged by service control server.Distance vector routing algorithm (Bellman-Ford Routing Algorithm) also is called maximum stream flow algorithm (Ford-Fulkerson Algorithm), its by distance vector protocols as an algorithm, like RIP, BGP, ISO IDRP, NOVELL IPX.Use the router of this algorithm must grasp this distance table (it is that an one dimension is arranged i.e. " vector "), it be illustrated in each node in the network farthest and minimum distance.This information in distance table is to upgrade constantly according to the change that closes on contact information.The amount of data and all contacts in network in the table (except it own itself) be equal to.The neighbours that row representative in this table directly links to each other with it, the institute of row representative in network on purpose.Each data comprise transfer data packets to the path of each destination on the net and distance/or the time on that path, transmit (being referred to as " cost ").This tolerance formula in that algorithm is the number of times that jumps, the stand-by period, flow out quantity of data packets, or the like.In the distance vector routing algorithm, periodically exchange routing table backup separately each other between the neighboring router.When network topology structure changes, between the router also with notifying relevant modification information in time each other.Preferably, physical distance is meant actual physical distance between wireless terminal and the routing node, and said physical distance can consider barrier, and promptly said distance can be an air line distance, also can be fold line distance.
According to preferred implementation of the present invention, industry wireless network comprises service control server and a plurality of Local Area Network, and each Local Area Network comprises an aggregation node and a plurality of wireless terminal.Wireless terminal; Periodically terminal characteristic information is reported service control server via the aggregation node of region network, said terminal characteristic information comprises: the transmission delay between the aggregation node of terminal processing capacity, terminate load state, the predetermined line duration in terminal and wireless terminal and its region network.Service control server selects a wireless terminal as the routing node in the Local Area Network from a plurality of wireless terminals according to terminal characteristic information.Preferably; Range ability vector routing algorithm is to obtain the network topological information of Local Area Network on routing node; Routing node reports service control server with the network topological information of said Local Area Network; The network topological information of said Local Area Network comprises physical distance and the transmission delay between each wireless terminal and the routing node at least, thereby by service control server the network topological information of a plurality of Local Area Networks is merged the network topological information that obtains industry wireless network.Aggregation node is used to receive the voice and/or the data service request of wireless terminal, and is used to transmit data.
The type of the wireless terminal 212 definite business that will initiate, if professional type is speech business, then wireless terminal 212 is directly initiated voice service request to aggregation node 202.If professional type is data service; Whether the data volume that the data service that further judgement is asked relates to is less than predetermined threshold; If then wireless terminal sends data service request to aggregation node, described request is forwarded to the Internet and receives the data service asked from the Internet by aggregation node; The data that the data service of being asked is relevant send to the wireless terminal of initiation request, and on the metadata cache routing node that the data service of being asked is relevant;
If related data volume is more than or equal to predetermined threshold; Then wireless terminal 212 sends data service request to routing node; The data whether routing node confirms to exist on the routing node wireless terminal 212 of initiation request to be asked; If have the data that the wireless terminal 212 of said initiation request is asked on the routing node, then routing node directly sends to said business datum the wireless terminal 212 of said initiation request; Otherwise; The data whether routing node confirms to exist on other wireless terminal in the Local Area Network wireless terminal of initiation request to ask; If have the data that the wireless terminal of said initiation request is asked on another wireless terminal 215 in the Local Area Network; Then routing node is transmitted to said another wireless terminal 215 with data service request, the data of being asked is sent to the wireless terminal of initiation request by said another wireless terminal 215;
If all there are not the data of being asked on the routing node or on other wireless terminal 212 in the Local Area Network; Then routing node is forwarded to aggregation node 202 with data service request; The content server of aggregation node 202 from the Internet obtains data; And said data are sent to routing node, the metadata cache that the data service of being asked is relevant is given the wireless terminal of initiation request on routing node and with data forwarding; Service control server is that said business datum is added indication information, and said indication information shows that routing node should store the shortest time of said business datum, and routing node is stored the said shortest time at least with said business datum.
According to preferred implementation of the present invention; Wherein also comprise following alternative method: when said routing node receives the data service request of wireless terminal; Routing node judges that according to the topology information of Local Area Network whether distance between said wireless terminal and the aggregation node 202 is less than the distance between routing node and the aggregation node 202; If; Then routing node is to wireless terminal transmission range information; Said range information comprises distance between indication wireless terminal and the aggregation node 202 less than the information of the distance between routing node and the aggregation node 202, and wireless terminal is measured the transmission delay with aggregation node 202 and routing node respectively, is connected and directly connects being connected of aggregation node 202 or maintenance and routing node according to transmission delay and the definite disconnection of range information and routing node; If wherein wireless terminal directly connects aggregation node 202, then said wireless terminal directly is sent to voice service request and/or data service request aggregation node 202 and does not send to routing node.
According to preferred implementation of the present invention; Wherein need transmit and need carry out encrypted transmission the time through routing node when the related data of data service; Wireless terminal is set up via aggregation node 202 and is connected with the interim of service control server, and service control server is wireless terminal distribution dynamic key and the corresponding relation of on said aggregation node 202, storing wireless terminal and dynamic key; At uplink direction; Wireless terminal is encrypted and will be passed through ciphered data according to dynamic key to its data that will send and sends routing node to; Be transmitted to aggregation node 202 with said through ciphered data by routing node again, and decipher by aggregation node 202; And in the down link direction; When the destination of the data of finding to transmit when aggregation node 202 is said wireless terminal; Aggregation node 202 utilizes dynamic key that said data are encrypted; And will pass through ciphered data and send routing node to, be transmitted to wireless terminal by routing node, wireless terminal to the data deciphering to obtain data decryption.
According to preferred implementation of the present invention; Wherein service control server is being provided with the host node unit and on each of said a plurality of wireless terminals, is being provided with from node unit on the routing node; When service control server need be carried out emergency treatment; Alarm information is sent to the host node unit in the routing node; The host node unit be used for wireless terminal on communicate from node unit, at least one operating below coming wireless terminal carried out according to the interface that provides from node unit: the display device at wireless terminal shows instant message; Make wireless terminal preserve the state of the business datum of sending/receiving; To be transferred to another wireless terminal with relevant state and the data of processing carried out on the said wireless terminal; Close the wireless device of wireless terminal.
According to preferred implementation of the present invention; When first wireless terminal in a plurality of wireless terminals is wanted to visit the application on second wireless terminal; Between first wireless terminal and second wireless terminal, set up wireless connections, first wireless terminal sends terminal identifier to service control server, and service control server generates first verify data according to terminal identifier; Second wireless terminal sends the identifier of said application to service control server; Service control server generates second verify data according to the identifier of said application, and service control server sends to second wireless terminal with first verify data, and second verify data is sent to first wireless terminal; Second wireless terminal confirms that according to first verify data whether first wireless terminal is through authentication; And first wireless terminal according to second verify data confirm the application that will visit whether through authentication, if all through authentication, then two wireless terminals of service control server mandate carry out direct communication.
According to preferred implementation of the present invention; A kind of service control method that is used for industry wireless network also is provided; Said industry wireless network comprises service control server and a plurality of Local Area Network, and each Local Area Network comprises an aggregation node and a plurality of wireless terminal, and said method comprises:
Step 301, a plurality of wireless terminals in each Local Area Network periodically report service control server with terminal characteristic information via the aggregation node of region network.Wherein said terminal characteristic information comprises: the transmission delay between the aggregation node of terminal processing capacity, terminate load state, the predetermined line duration in terminal and wireless terminal and its region network.
Step 302, service control server selects a wireless terminal as the routing node in the Local Area Network from a plurality of wireless terminals according to terminal characteristic information.
Step 303; At the network topological information of the vectorial routing algorithm of range ability on the routing node (in specification, explaining) with the acquisition Local Area Network; Routing node reports service control server with the network topological information of said Local Area Network; The network topological information of said Local Area Network comprises physical distance and the transmission delay between each wireless terminal and the routing node at least, thereby by service control server the network topological information of a plurality of Local Area Networks is merged the network topological information that obtains industry wireless network.
Step 304 according to the type of service of initiating, is carried out data processing.
The type of the definite business that will initiate of wireless terminal, if professional type is speech business, then wireless terminal is directly initiated voice service request to aggregation node.If professional type is data service; Whether the data volume that the data service that further judgement is asked relates to is less than predetermined threshold; If then wireless terminal sends data service request to aggregation node, described request is forwarded to the Internet and receives the data service asked from the Internet by aggregation node; The data that the data service of being asked is relevant send to the wireless terminal of initiation request, and on the metadata cache routing node that the data service of being asked is relevant.
If related data volume is more than or equal to predetermined threshold; Then wireless terminal sends data service request to routing node; The data whether routing node confirms to exist on the routing node wireless terminal of initiation request to ask; If have the data that the wireless terminal of said initiation request is asked on the routing node, then routing node directly sends to said business datum the wireless terminal of said initiation request; Otherwise; The data whether routing node confirms to exist on other wireless terminal in the Local Area Network wireless terminal of initiation request to ask; If have the data that the wireless terminal of said initiation request is asked on another wireless terminal in the Local Area Network; Then routing node is transmitted to said another wireless terminal with data service request, the data of being asked is sent to the wireless terminal of initiation request by said another wireless terminal.
If all there are not the data of being asked on the routing node or on other wireless terminal in the Local Area Network; Then routing node is forwarded to aggregation node with data service request; The content server of aggregation node from the Internet obtains data; And said data are sent to routing node, the metadata cache that the data service of being asked is relevant is given the wireless terminal of initiation request on routing node and with data forwarding; Service control server is that said business datum is added indication information, and said indication information shows that routing node should store the shortest time of said business datum, and routing node is stored the said shortest time at least with said business datum.
The present invention can be presented as other concrete form that does not depart from essential characteristic of the present invention.The execution mode of being introduced only is considered to explanatory in all respects and is not to be restrictive.Therefore, scope of the present invention is represented by accompanying claims, and is not to be to be represented by above-mentioned specification.Implication and all changes in the scope in the claim equivalence all are included in the scope of claim.
Those skilled in the art can recognize easily that the step of various said methods can be carried out by programmable calculator.Some execution modes relate to program storage device; For example machine or computer-readable and digital data storage medium that machine-executable program or the computer executable program of instruction are encoded, wherein said execution are carried out the some or all of steps of the method for introducing above said.Program storage device for example can be digital storage, the magnetic storage medium such as Disk and tape, hard disk drive or the readable digital data storage medium of light.Some execution modes comprise through the computer of programming with the said step of execution said method.
Claims (10)
1. service control method that is used for industry wireless network, said industry wireless network comprises service control server and a plurality of Local Area Network, and each Local Area Network comprises an aggregation node and a plurality of wireless terminal, and said method comprises:
A plurality of wireless terminals in each Local Area Network periodically report service control server with terminal characteristic information via the aggregation node of region network, and said terminal characteristic information comprises: the transmission delay between the aggregation node of terminal processing capacity, terminate load state, the predetermined line duration in terminal and wireless terminal and its region network;
Service control server selects a wireless terminal as the routing node in the Local Area Network from a plurality of wireless terminals according to terminal characteristic information;
Range ability vector routing algorithm is to obtain the network topological information of Local Area Network on routing node; Routing node reports service control server with the network topological information of said Local Area Network; The network topological information of said Local Area Network comprises physical distance and the transmission delay between each wireless terminal and the routing node at least, thereby by service control server the network topological information of a plurality of Local Area Networks is merged the network topological information that obtains industry wireless network;
The type of the definite business that will initiate of wireless terminal, if professional type is speech business, then wireless terminal is directly initiated voice service request to aggregation node;
If professional type is data service; Whether the data volume that the data service that further judgement is asked relates to is less than predetermined threshold; If then wireless terminal sends data service request to aggregation node, described request is forwarded to the Internet and receives the data service asked from the Internet by aggregation node; The data that the data service of being asked is relevant send to the wireless terminal of initiation request, and on the metadata cache routing node that the data service of being asked is relevant;
If related data volume is more than or equal to predetermined threshold; Then wireless terminal sends data service request to routing node; The data whether routing node confirms to exist on the routing node wireless terminal of initiation request to ask; If have the data that the wireless terminal of said initiation request is asked on the routing node, then routing node directly sends to said business datum the wireless terminal of said initiation request; Otherwise; The data whether routing node confirms to exist on other wireless terminal in the Local Area Network wireless terminal of initiation request to ask; If have the data that the wireless terminal of said initiation request is asked on another wireless terminal in the Local Area Network; Then routing node is transmitted to said another wireless terminal with data service request, the data of being asked is sent to the wireless terminal of initiation request by said another wireless terminal;
If all there are not the data of being asked on the routing node or on other wireless terminal in the Local Area Network; Then routing node is forwarded to aggregation node with data service request; The content server of aggregation node from the Internet obtains data; And said data are sent to routing node, the metadata cache that the data service of being asked is relevant is given the wireless terminal of initiation request on routing node and with data forwarding; Service control server is that said business datum is added indication information, and said indication information shows that routing node should store the shortest time of said business datum, and routing node is stored the said shortest time at least with said business datum.。
2. service control method according to claim 1; Wherein also comprise following alternative method: when said routing node receives the data service request of wireless terminal; Routing node judges that according to the topology information of Local Area Network whether distance between said wireless terminal and the aggregation node is less than the distance between routing node and the aggregation node; If; Then routing node is to wireless terminal transmission range information; Said range information comprises distance between indication wireless terminal and the aggregation node less than the information of the distance between routing node and the aggregation node, and wireless terminal is the transmission delay of measurement and aggregation node and routing node respectively, is connected and directly connects being connected of aggregation node or maintenance and routing node according to transmission delay and the definite disconnection of range information and routing node; If wherein wireless terminal directly connects aggregation node, then said wireless terminal directly is sent to voice service request and/or data service request aggregation node and does not send to routing node.
3. service control method according to claim 1; Wherein need transmit and need carry out encrypted transmission the time through routing node when the related data of data service; Wireless terminal is set up via aggregation node and is connected with the interim of service control server, and service control server is wireless terminal distribution dynamic key and the corresponding relation of on said aggregation node, storing wireless terminal and dynamic key; At uplink direction; Wireless terminal is encrypted and will be passed through ciphered data according to dynamic key to its data that will send and sends routing node to; Be transmitted to aggregation node with said through ciphered data by routing node again, and decipher by aggregation node; And in the down link direction; When the destination of the data of finding to transmit when aggregation node is said wireless terminal; Aggregation node utilizes dynamic key that said data are encrypted; And will pass through ciphered data and send routing node to, be transmitted to wireless terminal by routing node, wireless terminal to the data deciphering to obtain data decryption.
4. service control method according to claim 1; Wherein service control server is being provided with the host node unit and on each of said a plurality of wireless terminals, is being provided with from node unit on the routing node; When service control server need be carried out emergency treatment; Alarm information is sent to the host node unit in the routing node; The host node unit be used for wireless terminal on communicate at least one operating below coming wireless terminal carried out according to the interface that provides from node unit from node unit:
On the display device of wireless terminal, show instant message;
Make wireless terminal preserve the state of the business datum of sending/receiving;
To be transferred to another wireless terminal with relevant state and the data of processing carried out on the said wireless terminal;
Close the wireless device of wireless terminal.
5. service control method according to claim 1; When first wireless terminal in a plurality of wireless terminals is wanted to visit the application on second wireless terminal; Between first wireless terminal and second wireless terminal, set up wireless connections, first wireless terminal sends terminal identifier to service control server, and service control server generates first verify data according to terminal identifier; Second wireless terminal sends the identifier of said application to service control server; Service control server generates second verify data according to the identifier of said application, and service control server sends to second wireless terminal with first verify data, and second verify data is sent to first wireless terminal; Second wireless terminal confirms that according to first verify data whether first wireless terminal is through authentication; And first wireless terminal according to second verify data confirm the application that will visit whether through authentication, if all through authentication, then two wireless terminals of service control server mandate carry out direct communication.
6. service control system that is used for industry wireless network, said industry wireless network comprises service control server and a plurality of Local Area Network, each Local Area Network comprises an aggregation node and a plurality of wireless terminal, it is characterized in that,
Wireless terminal; Periodically terminal characteristic information is reported service control server via the aggregation node of region network, said terminal characteristic information comprises: the transmission delay between the aggregation node of terminal processing capacity, terminate load state, the predetermined line duration in terminal and wireless terminal and its region network;
Service control server selects a wireless terminal as the routing node in the Local Area Network from a plurality of wireless terminals according to terminal characteristic information; And
Range ability vector routing algorithm is to obtain the network topological information of Local Area Network on routing node; Routing node reports service control server with the network topological information of said Local Area Network; The network topological information of said Local Area Network comprises physical distance and the transmission delay between each wireless terminal and the routing node at least, thereby by service control server the network topological information of a plurality of Local Area Networks is merged the network topological information that obtains industry wireless network;
Aggregation node is used to receive the voice and/or the data service request of wireless terminal, and is used to transmit data;
Wherein, the type of the definite business that will initiate of wireless terminal, if professional type is speech business, then wireless terminal is directly initiated voice service request to aggregation node;
If professional type is data service; Whether the data volume that the data service that further judgement is asked relates to is less than predetermined threshold; If then wireless terminal sends data service request to aggregation node, described request is forwarded to the Internet and receives the data service asked from the Internet by aggregation node; The data that the data service of being asked is relevant send to the wireless terminal of initiation request, and on the metadata cache routing node that the data service of being asked is relevant;
If related data volume is more than or equal to predetermined threshold; Then wireless terminal sends data service request to routing node; The data whether routing node confirms to exist on the routing node wireless terminal of initiation request to ask; If have the data that the wireless terminal of said initiation request is asked on the routing node, then routing node directly sends to said business datum the wireless terminal of said initiation request; Otherwise; The data whether routing node confirms to exist on other wireless terminal in the Local Area Network wireless terminal of initiation request to ask; If have the data that the wireless terminal of said initiation request is asked on another wireless terminal in the Local Area Network; Then routing node is transmitted to said another wireless terminal with data service request, the data of being asked is sent to the wireless terminal of initiation request by said another wireless terminal;
If all there are not the data of being asked on the routing node or on other wireless terminal in the Local Area Network; Then routing node is forwarded to aggregation node with data service request; The content server of aggregation node from the Internet obtains data; And said data are sent to routing node, the metadata cache that the data service of being asked is relevant is given the wireless terminal of initiation request on routing node and with data forwarding; Service control server is that said business datum is added indication information, and said indication information shows that routing node should store the shortest time of said business datum, and routing node is stored the said shortest time at least with said business datum.
7. service control system according to claim 6; Wherein when said routing node receives the data service request of wireless terminal; Routing node judges that according to the topology information of Local Area Network whether distance between said wireless terminal and the aggregation node is less than the distance between routing node and the aggregation node; If; Then routing node is to wireless terminal transmission range information; Said range information comprises distance between indication wireless terminal and the aggregation node less than the information of the distance between routing node and the aggregation node, and wireless terminal is the transmission delay of measurement and aggregation node and routing node respectively, is connected and directly connects being connected of aggregation node or maintenance and routing node according to transmission delay and the definite disconnection of range information and routing node; If wherein wireless terminal directly connects aggregation node, then said wireless terminal directly is sent to voice service request and/or data service request aggregation node and does not send to routing node.
8. service control system according to claim 6; Wherein need transmit and need carry out encrypted transmission the time through routing node when the related data of data service; Wireless terminal is set up via aggregation node and is connected with the interim of service control server, and service control server is wireless terminal distribution dynamic key and the corresponding relation of on said aggregation node, storing wireless terminal and dynamic key; At uplink direction; Wireless terminal is encrypted and will be passed through ciphered data according to dynamic key to its data that will send and sends routing node to; Be transmitted to aggregation node with said through ciphered data by routing node again, and decipher by aggregation node; And in the down link direction; When the destination of the data of finding to transmit when aggregation node is said wireless terminal; Aggregation node utilizes dynamic key that said data are encrypted; And will pass through ciphered data and send routing node to, be transmitted to wireless terminal by routing node, wireless terminal to the data deciphering to obtain data decryption.
9. service control system according to claim 6; Wherein service control server is provided with the host node unit and on each of said a plurality of wireless terminals, is provided with from node unit being provided with on the routing node; When service control server need be carried out emergency treatment; Alarm information is sent to the host node unit in the routing node; The host node unit be used for wireless terminal on communicate at least one operating below coming wireless terminal carried out according to the interface that provides from node unit from node unit:
On the display device of wireless terminal, show instant message;
Make wireless terminal preserve the state of the business datum of sending/receiving;
Close the wireless device of wireless terminal.
10. service control system according to claim 6; When first wireless terminal in a plurality of wireless terminals is wanted to visit the application on second wireless terminal; Between first wireless terminal and second wireless terminal, set up wireless connections, first wireless terminal sends terminal identifier to service control server, and service control server generates first verify data according to terminal identifier; Second wireless terminal sends the identifier of said application to service control server; Service control server generates second verify data according to the identifier of said application, and service control server sends to second wireless terminal with first verify data, and second verify data is sent to first wireless terminal; Second wireless terminal confirms that according to first verify data whether first wireless terminal is through authentication; And first wireless terminal according to second verify data confirm the application that will visit whether through authentication, if all through authentication, then two wireless terminals of service control server mandate carry out direct communication.
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| CN112311681A (en) * | 2019-07-31 | 2021-02-02 | 中车株洲电力机车研究所有限公司 | Data transmission method and system |
| CN111775711A (en) * | 2020-07-08 | 2020-10-16 | 深圳技术大学 | Pure electric vehicle state monitoring method and system |
| CN111775711B (en) * | 2020-07-08 | 2022-05-31 | 深圳技术大学 | Pure electric vehicle state monitoring method and system |
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