CN102612168B - ZStack (Zigbee Protocol Stack)-based heterogeneous network data interaction method - Google Patents
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Abstract
The invention discloses a ZStack (Zigbee Protocol Stack)-based heterogeneous network data interaction method, wherein an SH protocol layer is added in a ZStack in each Zigbee equipment to cooperate with an SH protocol switch, so that each Zigbee equipment has a unique TCP/IP (Transmission Control Protocol/Internet Protocol) network identity, and the TCP/IP-based Ethernet which is quite mature nowadays is connected with a Zigbee wireless sensor network, so that Zigbee network programming equipment becomes TCP/IP network equipment. The unique TCP/IP network identity of each equipment can be relied on for communication among Zigbee equipment and between the TCP/IP network equipment and the Zigbee equipment, and thus, the application range of the Zigbee equipment is widened further.
Description
Technical field
The present invention relates to radio sensing network, relate in particular to a kind of heterogeneous network data interactive method based on ZStack agreement.
Background technology
Zigbee(IEEE802.15.4) technology is a kind of short-distance wireless communication technology that latest developments are got up.It uses 2.4GHz wave band, adopt frequency hopping and spread spectrum, have low in energy consumption, delay little, high reliability, low complex degree, low cost, low data rate, the features such as self-organizing network, make it have very large development space in fields such as industrial monitoring, sensor network, family's monitoring, safety systems.
In order to realize the communication of Zigbee network equipment room of cross-region, complete the control and management of remote data direct interaction and long-range Zigbee network equipment, allow Zigbee network equipment room can be in order, work efficiently, only using Zigbee network is impossible realize, reason is that the communication distance of Zigbee network point-to-point is less than 1KM, realize the communication of cross-region, just must between two places, arrange a large amount of Zigbee nodes, make data between Zigbee network node in the mode of " relay " through being repeatedly sent to destination after route.This way network is delayed greatly, quantities is large, hardware cost is high, has no Practical significance, and the communication that how effectively to realize the Zigbee network equipment room of cross-region becomes one and is necessary the problem solving.
In addition, Zigbee agreement and present widely used ICP/IP protocol are completely incompatible, and Zigbee equipment can not be directly and TCP/IP devices communicating.
Summary of the invention
The object of this invention is to provide a kind of heterogeneous network data interactive method based on ZStack agreement, solving the communication issue of Zigbee network equipment room of existing cross-region and Zigbee equipment can not be directly and the problem of TCP/IP devices communicating.
In order to realize foregoing invention object, the invention provides a kind of heterogeneous network data interactive method based on ZStack agreement, in the ZStack of each Zigbee equipment protocol stack, add one deck SH protocol layer, described SH protocol layer matches with SH agreement switch, makes each Zigbee equipment have a unique TCP/IP network identity;
The application data of Zigbee equipment is encapsulated as SH protocol layer data by described SH protocol layer;
Described SH protocol layer data entirety encapsulates again as the application data of Zigbee protocol layer, and is sent to Zigbee telegon by Zigbee network;
The application data of Zigbee protocol layer is sent to SH agreement switch by Zigbee telegon, and SH agreement switch, according to the frame head of SH protocol layer data and postamble information, is forwarded to object equipment by the application data in SH protocol layer data.
Wherein, described SH agreement switch is according to the frame head of SH protocol layer data and postamble information, application data in SH protocol layer data is forwarded to object device step, further comprise: SH agreement switch is crossed TCP/IP network according to the frame originating point information of SH protocol layer data and postamble information exchange, SH protocol layer data are sent to object SH agreement switch; Object SH agreement switch is received after described SH protocol layer data, according to the frame head of SH protocol layer data and postamble information, the application data in SH protocol layer data is forwarded to object equipment.
Wherein, described SH protocol layer data comprise frame head, postamble and application data, and described frame head is for store data routing iinformation, and postamble is used for storing checking data, and the data routing iinformation that described frame head is deposited comprises source address and the destination address of data.
Wherein, described object equipment is TCP/IP equipment or Zigbee equipment.
Wherein, in the time that described object equipment is Zigbee equipment, described object Zigbee equipment and data source Zigbee equipment belong to two Zigbee networks.
Wherein, when TCP/IP equipment is during to Zigbee equipment sending data, carry out data transmission according to the TCP/IP network identity of Zigbee equipment.
Compared with prior art, the present invention has following beneficial effect:
The present invention adds one deck SH protocol layer in the ZStack of each Zigbee equipment protocol stack, described SH protocol layer matches with SH agreement switch, make each Zigbee equipment there is a unique TCP/IP network identity, make Zigbee net set up the standby TCP/IP network equipment that becomes.Zigbee equipment room and the TCP/IP network equipment and Zigbee equipment room can be dependent on the unique TCP/IP network identity of each equipment and communicate, and have further widened the Zigbee equipment scope of application.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing:
Fig. 1 is application data encapsulation schematic diagram in embodiment of the present invention Zigbee equipment;
Fig. 2 is the heterogeneous network topological structure schematic diagram of the embodiment of the present invention based on ZStack agreement.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment of the present invention method is added one deck SH agreement and is matched with SH agreement switch in Zigbee protocol stack, make each Zigbee equipment have a unique TCP/IP network identity, for application program, Zigbee agreement is transparent, makes Zigbee net set up the standby TCP/IP network equipment that becomes.Zigbee equipment room and the TCP/IP network equipment are communicated by letter with Zigbee equipment room, the unique TCP/IP network identity of each equipment that places one's entire reliance upon.
First, it should be noted that, SH agreement is by the self-defining network transmission protocol of the applicant, in SH agreement switch, operation has the data exchange agreement corresponding with SH agreement, SH agreement switch can be identified by the data after the encapsulation of SH protocol layer, and both cooperatively interact and the data of Zigbee equipment kind can be carried out to remote routing.Wherein the SH code in SH protocol layer and SH agreement switch, without concrete art-recognized meanings, is only a kind of self-defined title.
SH protocol frame structure in the embodiment of the present invention can be illustrated with table one:
Table one:
| Frame head (Head) | Data bit (Data) | Postamble (End) |
| 31 bytes | ? | 3 bytes |
Wherein, frame head is mainly used in store data routing iinformation, and routing iinformation comprises the information such as source address and destination address of data, and data bit is used for depositing application data, and postamble is used for storing checking data.
Wherein, header content definition mode can be referring to table two:
Table two:
| Position | Position is described | Bit length (byte) |
| H1 | Beginning character | 1 |
| H 2 | Frame type | 1 |
| H 3 | Frame length | 1 |
| H 4 | Bunch | 2 |
| H 5 | Destination address | 13 |
| H 6 | Source address | 13 |
Wherein, frame type is to be Frame or network operation frame for the classification of judgment frame; Frame length is for the total length of descriptor frame; Source address is the initiation address of frame; Destination address is the receiver address of frame.Source address and destination address content all can table three mode represent:
Table three:
| Position is described | Data switching exchane Mac | Network type | Node IP | Program port |
| Bit length (byte) | 6 | 1 | 4 | 2 |
Wherein, data switching exchane Mac is the physical address of higher level's data switching exchane of target; Network type is the classification of describing network, mainly comprises at present Zigbee, TinyOS, Wifi, RFID, Ethernet, bluetooth, 3G etc., and node IP is the IP address of target.
The content-defined mode of postamble can be referring to table four:
Table four:
| Position | Describe | Length (byte) |
| CRC check | All data before this CRC of this agreement are done to verification | 2 |
| Termination character | The complete frame of this agreement is made to end mark | 1 |
The present invention encapsulates one deck SH protocol layer on the basis of ZStack protocol stack again, is mainly used in as application layer program provides data transmission interface, and resolves for receiving network packet the application layer program that offers.
In embodiments of the present invention, when application program will be carried out network data transmission, first can call SH protocol layer data transmission interface is provided, the data of application program are come in as interface parameters transmission.On Zigbee equipment, when the application data of application program is issued to Zigbee network from application layer, experience encapsulation process as shown in Figure 1:
Referring to Fig. 1, first, the application data of application program encapsulates at SH protocol layer, becomes SH protocol layer data, and the application data of application program is used as the application data in SH protocol layer data; Described SH protocol layer data comprise frame head, postamble and application data, and described frame head is for store data routing iinformation, and postamble is used for storing checking data, and the data routing iinformation that described frame head is deposited comprises source address and the destination address of data.
Then, SH protocol layer, using SH protocol data frame head, application data and SH protocol data postamble entirety as the application data of Zigbee protocol layer, is passed to Zigbee protocol layer and again encapsulates; Finally, the data of whole Zigbee protocol layer will be sent to Zigbee telegon by Zigbee network.The application data of Zigbee protocol layer is sent to SH agreement switch by Zigbee telegon, and SH agreement switch can, according to the frame head of SH protocol layer data and postamble information, be forwarded to object equipment by the application data in SH protocol layer data.Described object equipment is real TCP/IP equipment, can be also Zigbee equipment, and in the time that described object equipment is Zigbee equipment, described object Zigbee equipment and data source Zigbee equipment belong to two Zigbee networks.
Wherein, the packet that add specific packet header bag tail of SH agreement switch after each port monitoring reception is by SH protocol encapsulation.Receiving after packet, cross the data type (user data or network operation data) of this packet of analysis judgment to packet header, network operation frame if, program continues to resolve the routing address that these data of this data acquisition send, and the routing table in switch is increased newly, upgraded; User data frame if, the transmission types information in program meeting resolution data packet header, judge with this, this Frame be the mode based on there being link send or based on sending without the mode of link (have link and without the send mode of link just as TCP and the UDP mode of ICP/IP protocol, the mode that has link is exactly in order to ensure that data can send reliably, without the send mode of link, can not ensure that data can send to), after the send mode of specified data, will go to search routing table, determine transmit path, data are sent.
The present invention is based in the heterogeneous network data interactive method of ZStack agreement, in the time that object equipment and source Zigbee equipment do not belong to the subnet under same SH agreement switch, when the data of Zigbee protocol layer are sent on Zigbee telegon by Zigbee network, telegon can be sent to the application data in Zigbee protocol layer SH agreement switch (from the relation in Fig. 1, application data in Zigbee protocol layer is now exactly the data of whole SH protocol layer), SH agreement switch is according to the frame head of SH protocol layer and postamble, be sent on corresponding object SH agreement switch by TCP/IP network, object SH agreement switch is received after data, according to the frame head of SH protocol layer in data, postamble information by the application data in SH protocol layer (from the relation in Fig. 1, application data in SH protocol layer is exactly the data that on the Zigbee equipment of source, application program sends) be forwarded to the object equipment being connected with it.
The embodiment of the present invention is in the time of the ZStack protocol stack using through encapsulating SH protocol layer, application layer program only need to pass to the form of parameter the task interpolation interface that SH protocol layer provides by its initialization function (type function is identical with the task initialization function of former ZStack) and event handling function (event handling function of type function and former ZStack is identical), when system operation, operating system can be application helical pitch order Resources allocation, and in application initialization function, application program is registered, bound with the port of specifying.
When application layer program will be to the TCP/IP network equipment (under SH protocol layer and SH agreement switch, Zigbee network equipment is equal to TCP/IP equipment) send when data, call the data transmission interface that SH protocol layer provides, and the corresponding IP of the intended target TCP/IP network equipment, port etc., after data are sent, can be sent on corresponding equipment through a series of conversion and route.When TCP/IP equipment is during to Zigbee equipment sending data, carry out data transmission according to the TCP/IP network identity of Zigbee equipment, in the time that ZStack protocol layer receives network data, data can be passed through SH protocol layer, SH protocol layer is resolved packet, user data is wherein offered to the application program of corresponding port, to AF_INCOMING_MSG_CMD event of corresponding application triggers, application program is taken user data away in this event handling function.
In Zigbee network, the node theory that can hold in individual network is 65535, and in each Zigbee equipment, can support that the program program of operation is 240, and each application program is bound mutually with the port of appointment in the time of registration.
Referring to Fig. 2, for a kind of heterogeneous network topological structure schematic diagram based on ZStack agreement in the embodiment of the present invention, (Zigbee network a, Zigbee network bZigbee network are c) to comprise 3 Zigbee networks, the Zigbee telegon of each Zigbee network is connected with TCP/IP network by SH agreement switch, and each SH agreement switch can connect at least one Zigbee network by Zigbee telegon; Each Zigbee network comprises at least one Zigbee equipment, is packaged with one deck SH protocol layer in the ZStack protocol stack of each Zigbee equipment.In Fig. 2, Zigbee network a comprises Zigbee equipment 1 and Zigbee equipment 2, and Zigbee network b comprises Zigbee equipment 3, and Zigbee network c comprises Zigbee equipment 4; Zigbee network a is connected to TCP/IP network by telegon and SH agreement switch A; Zigbee network b and Zigbee network c are all connected to SH agreement switch b by telegon, are connected to TCP/IP network; TCP/IP equipment 10 and TCP/IP equipment 11 are all connected to TCP/IP network by SH agreement switch C.
In the network topology structure in Fig. 2, communication between devices has 4 kinds of modes, due to data in equipment transmitting explanation in the preceding article, below only introduce the route details of data at network.
1) communication of the equipment room in same Zigbee network:
As communicating by letter between the equipment Zigbee equipment 1 in Zigbee network a and Zigbee equipment 2, when this communication mode, data can not be passed to SH agreement switch, but be directly routed to corresponding target Zigbee equipment in Zigbee network a inside, be the communication mode of the equipment room in traditional Z igbee network.
2) do not belong to the subnet under same SH agreement switch at same Zigbee network and two Zigbee networks, the communication of the Zigbee equipment between two nets:
As the Zigbee equipment 3 in Zigbee network b wants to send data to the Zigbee equipment 4 in Zigbee network c, when communication, the data of the Zigbee equipment 3 in Zigbee network b are sent directly to the telegon of Zigbee network b, data are passed to gateway-SH agreement switch b (each SH agreement switch can connect several Zigbee telegons) removed Zigbee protocol layer in telegon after, the relevant information that SH agreement switch b provides according to the SH protocol layer in packet routes to data the telegon of Zigbee network c, the relevant information that telegon provides according to the SH protocol layer in packet be in data encapsulation Zigbee protocol layer to allow the data can be by the correct Zigbee equipment 4 in Zigbee network c that routes in Zigbee network.
3) do not belong to the subnet under same SH agreement switch at same Zigbee network and two Zigbee networks, the communication of the Zigbee equipment between two nets:
As the Zigbee equipment 1 in Zigbee network a wants to send data to the Zigbee equipment 4 in Zigbee network c, when communication, the data of the Zigbee equipment 1 in Zigbee network a are sent directly to the telegon of Zigbee network a, data are passed to SH agreement switch A removed Zigbee protocol layer in telegon after, the relevant information that SH agreement switch A provides according to the SH protocol layer in packet is sent to SH agreement switch b by data by TCP/IP network, the relevant information that SH agreement switch b provides according to the SH protocol layer in packet routes to data the telegon of Zigbee network c, the relevant information that telegon provides according to the SH protocol layer in packet be in data encapsulation Zigbee protocol layer to allow the data can be by the correct Zigbee equipment 4 in Zigbee network c that routes in Zigbee network.
4) Zigbee network equipment is with the communication of TCP/IP LA Management Room:
As data are sent TCP/IP equipment 10 by Zigbee equipment 1 wish in Zigbee network a.When communication, the data of the Zigbee equipment 1 in Zigbee network a are sent directly to the telegon of Zigbee network a, data are passed to SH agreement switch A removed Zigbee protocol layer in telegon after, the relevant information that SH agreement switch A provides according to the SH protocol layer in packet is sent to SH agreement switch C by data by TCP/IP network, and data are routed to TCP/IP equipment 10 by the relevant information that SH agreement switch C provides according to the SH protocol layer in packet.
The embodiment of the present invention is added one deck SH protocol layer in the ZStack of each Zigbee equipment protocol stack, described SH protocol layer matches with SH agreement switch, make each Zigbee equipment there is a unique TCP/IP network identity, by now the very ripe Ethernet based on ICP/IP protocol " be communicated with " with Zigbee radio sensing network phase, Zigbee net is set up for becoming a TCP/IP network equipment.Zigbee equipment room and the TCP/IP network equipment and Zigbee equipment room can be dependent on the unique TCP/IP network identity of each equipment and communicate.
Disclosed all features in this specification, or step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing), unless narration especially all can be replaced by other equivalences or the alternative features with similar object.,, unless narration especially, each feature is an example in a series of equivalences or similar characteristics.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination disclosing in this manual, and the arbitrary new method disclosing or step or any new combination of process.
Claims (1)
1. the heterogeneous network data interactive method based on ZStack agreement, it is characterized in that, in the ZStack of each Zigbee equipment protocol stack, add one deck SH protocol layer, described SH protocol layer matches with SH agreement switch, makes each Zigbee equipment have a unique TCP/IP network identity;
The application data of Zigbee equipment is encapsulated as SH protocol layer data by described SH protocol layer;
Described SH protocol layer data entirety encapsulates again as the application data of Zigbee protocol layer, and is sent to Zigbee telegon by Zigbee network;
The application data of Zigbee protocol layer is sent to SH agreement switch by Zigbee telegon, and SH agreement switch, according to the frame head of SH protocol layer data and postamble information, is forwarded to object equipment by the application data in SH protocol layer data;
Concrete steps are: first, on Zigbee equipment, the application data of application program encapsulates at SH protocol layer, become SH protocol layer data, and the application data of application program is used as the application data in SH protocol layer data; Described SH protocol layer data comprise frame head, postamble and application data, and described frame head is for store data routing iinformation, and postamble is used for storing checking data, and the data routing iinformation that described frame head is deposited comprises source address and the destination address of data; Described SH protocol layer data frame head is 31 bytes, is defined as follows:
Wherein, frame type is to be Frame or network operation frame for the classification of judgment frame; Frame length is for the total length of descriptor frame; Source address is the initiation address of frame; Destination address is the receiver address of frame; The expression that thes contents are as follows of source address and destination address:
Wherein, data switching exchane Mac is the physical address of higher level's data switching exchane of target, and network type is the classification of describing network, and node IP is the IP address of target;
Described SH protocol layer data postamble thes contents are as follows:
Then, SH protocol layer using SH protocol data frame head, application data and SH protocol data postamble entirety as
The application data of Zigbee protocol layer, is passed to Zigbee protocol layer and again encapsulates;
Finally, the data of whole Zigbee protocol layer are sent to Zigbee telegon by Zigbee network, the application data of Zigbee protocol layer is sent to SH agreement switch by Zigbee telegon, SH agreement switch is according to the frame head of SH protocol layer data and postamble information, application data in SH protocol layer data is forwarded to object equipment, described object equipment is TCP/IP equipment or Zigbee equipment, in the time that described object equipment is Zigbee equipment, described object Zigbee equipment and data source Zigbee equipment belong to two Zigbee networks;
Wherein, the Frame that add specific frame head postamble of SH agreement switch after each port monitoring reception is by SH protocol encapsulation, receiving after Frame, by the data type of this Frame of analysis judgment to frame head, network operation frame if, continue to resolve the routing address that these data of this data acquisition send, the routing table in switch is increased newly, upgraded; User data frame if, the transmission types information of resolution data frame head, judges that with this this Frame is that the mode that the mode based on there being link sends or links based on nothing sends, after the send mode of specified data, search routing table, determine transmit path, data are sent.
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