CN104507175A - WIA-PA (Wireless Networks for Industrial Automation Process Automation) network handheld device random network accessing method - Google Patents
WIA-PA (Wireless Networks for Industrial Automation Process Automation) network handheld device random network accessing method Download PDFInfo
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- CN104507175A CN104507175A CN201510016410.XA CN201510016410A CN104507175A CN 104507175 A CN104507175 A CN 104507175A CN 201510016410 A CN201510016410 A CN 201510016410A CN 104507175 A CN104507175 A CN 104507175A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access
- H04W74/0891—Non-scheduled access, e.g. ALOHA using a dedicated channel for access for synchronized access
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Abstract
The invention relates to a WIA-PA network handheld device random network accessing method and belongs to the technical field of industrial wireless communication. The method includes the steps that a handheld device to be accessed to a network monitors beacon frames sent by a routing device in the network or a gateway device in the network; a first cluster is selected and time synchronization is finished; the handheld device to be accessed to the network selects a random access preamble generated through a random access preamble generation module and a random access process is triggered through MAC (Media Access Control); the first cluster determines the legality of the random access preamble after receiving the random access preamble and sends the legitimate random access preamble to a network administrator and a security administrator; the network administrator and the security administrator perform security verification and then send out a random access response after receiving the random access preamble; the first cluster sends the response to the handheld device to be accessed to the network after receiving the random access response; finally, the handheld device to be accessed to the network determines whether the network accessing is successful or not according to the access response. The WIA-PA network handheld device random network accessing method can effectively improve the network access efficiency of the WIA-PA handheld device and the utilization rate of network resources.
Description
Technical field
The invention belongs to industrial wireless communication technical field, relate to a kind of method of WIA-PA network handheld device Network with Random Multiple Access System.
Background technology
Along with the fast development of information technology, industry wireless network technology becomes the new study hotspot of automatic field after fieldbus.Industry wireless network technology is strong with its flexibility, autgmentability is strong, cost is low, energy consumption is low and can be applicable to the features such as severe industrial environment, effectively can reduce cost of investment and the use cost of industry measurement and control system, greatly extend the range of application of industry measurement and control system.
In October, 2011, one of major criterion specification in International Industry wireless technical field is become by the WIA-PA standard of China's independent research, be mainly used in technical process measurement, supervisory and control, there is the technical characteristics such as very strong antijamming capability, super low energy consumption and real time communication.WIA-PA network primarily of main control computer, gateway device, routing device, field apparatus and handheld device 5 class physical equipment form.At present, the large quantifier elimination that domestic many researchers carry out the various equipment in WIA-PA network except handheld device, and obtain plentiful and substantial achievement in research, but less for the researcher of handheld device, especially the method for handheld device access WIA-PA network lacks further investigation especially.But, in WIA-PA network, handheld device can be used for surveillance equipment state, configuration device parameter and firmware and upgrades, and it serves as the role of bunch member, can add network at random to communicate with other equipment, it is more convenient and perfect to make the monitor and managment of network.
Existing WIA-PA standard definition handheld device enter network process and field apparatus to enter network process identical, this make handheld device to enter network process consuming time long.And prior art, after cluster head receives the networking request of handheld device, directly forwards the request of networking, reckons without the legitimacy of this networking request, there is the possibility that illegal networking request is constantly transmitted in a network, cause the waste of Internet resources.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of method of WIA-PA network handheld device Network with Random Multiple Access System, for the utilance of the networking efficiency and Internet resources that improve WIA-PA handheld device.
For achieving the above object, the invention provides following technical scheme:
A method for WIA-PA network handheld device Network with Random Multiple Access System, comprises the following steps:
Step one: handheld device to be networked continues to monitor the available channel in WIA-PA network, obtains the beacon frame sent at net routing device or gateway device;
Step 2: handheld device to be networked selects to send certain routing device of beacon frame or gateway device as cluster head, and the deadline is synchronous;
Step 3: handheld device to be networked triggers random access procedure by media interviews control MAC, first, selects random access guiding, then sends this random access guiding when channel idle to cluster head;
Step 4: after cluster head detects random access guiding, resolves random access guiding, judges the legitimacy of this random access guiding, if legal, forward this networking request to network manager and Secure Manager; Otherwise, then this random access guiding is abandoned;
Step 5: network manager and Secure Manager receive the random access guiding forwarded by cluster head, by resolving random access guiding, carrying out safety verification, providing accidental access response;
Step 6: send after random access guiding wait the handheld device networked, detect accidental access response, after receiving accidental access response, judge whether to access successfully according to relevant parameter in accidental access response; Or, at the appointed time, do not receive accidental access response, then this Stochastic accessing be judged as access failure, again initiate Stochastic accessing, until access success or sending times equal maximum reattempt times.
Further, in step 5, specifically comprise: if send out random access guiding handheld device be legitimate device, then by the safety verification of Secure Manager, network manager provides accidental access response, and sends accidental access response by WIA-PA network to described equipment; Otherwise, abandon this random access guiding.
Further, the parameter comprised in random access guiding comprises: the globally unique 64 long addresses of described handheld device, the sending times of random access procedure and the life span of this random access guiding.
Further, cluster head comprises validity judgement module, for judging the legitimacy of random access guiding.
Further, described handheld device comprises random access guiding generation module, this module is present in WIA-PA higher level protocol suite, random access guiding is generated by it, this is leading has high autocorrelation performance, low their cross correlation, constant amplitude and low peak average ratio feature, to increase the detection probability of cluster head, and reduce the misunderstanding probability of cluster head; Described random access guiding generation module can adopt permanent envelope zero auto-correlation (Constant Amplitude Zero Auto Correlation, CAZAC) sequence realizes, such as, can choose any one kind of them sequence to generate described random access guiding in Zadoff-Chu sequence, Frank sequence, Golomb sequence and Chirp sequence.
Further, described handheld device comprises time block, for timing from when the handheld device networked triggers random access procedure.
Further, described handheld device comprises judge module, for judging whether handheld device receives accidental access response in the Preset Time of setting, if not, then this random access procedure is judged as access failure; Otherwise, carry out subsequent processing steps.
Further, described judge module, also for judging that can accidental access response that handheld device receives allow handheld device success access network, if not, is then judged as access failure by this random access procedure; Otherwise, access successfully.
Further, described judge module, also for judging whether access failure number of times equals the maximum permission frequency of failure set, and if not, then, when channel idle, again initiates access procedure; Otherwise, then to upper strata report, processed by upper strata.
Beneficial effect of the present invention is: the method for WIA-PA network handheld device Network with Random Multiple Access System of the present invention, can significantly improve the networking efficiency of WIA-PA handheld device and the utilance of Internet resources.
Accompanying drawing explanation
In order to make object of the present invention, technical scheme and beneficial effect clearly, the invention provides following accompanying drawing and being described:
Fig. 1 is the procedure chart of WIA-PA network handheld device Stochastic accessing gateway device in embodiment;
Fig. 2 is the procedure chart of WIA-PA network handheld device Stochastic accessing routing device in embodiment;
Fig. 3 is the schematic flow sheet of WIA-PA network handheld device Network with Random Multiple Access System method in embodiment;
Fig. 4 is the structural representation of handheld device in embodiment;
Fig. 5 is the structural representation of cluster head in embodiment.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
In WIA-PA network, handheld device to be networked adds WIA-PA network by gateway device and routing device, and its process as depicted in figs. 1 and 2.
The process of the WIA-PA network handheld device Stochastic accessing gateway device that Fig. 1 provides for the present embodiment, comprising:
Step 101: handheld device to be networked continues to monitor the available channel in WIA-PA network, obtain at networking by or the beacon frame that sends of gateway device;
Step 102: handheld device to be networked selects the gateway device sending beacon frame as cluster head, and the deadline is synchronous;
Step 103: handheld device to be networked triggers random access procedure by media interviews control MAC, selects random access guiding, and sends this random access guiding when channel idle to gateway device;
Step 104: after gateway device detects random access guiding, resolves the legitimacy of random access guiding, if legal, forwards this random access guiding to network manager; Otherwise, then this random access guiding is abandoned;
Step 105: after the random access guiding that Secure Manager receives, by resolving random access guiding, carries out safety verification.Specifically comprise, send out random access guiding equipment be legitimate device, then safety verification success; Otherwise safety verification failure, abandons this access request.Wherein, the random access guiding that Secure Manager receives is forwarded by network manager, and the communication mode between Secure Manager and network manager does not specify;
Step 106: after safety verification success, send accidental access response by network manager;
Step 107: after gateway device receives accidental access response, forwards accidental access response to handheld device to be networked;
Step 108: handheld device to be networked detects accidental access response, judges whether to access successfully according to relevant parameter in accidental access response; Or, at the appointed time, do not receive accidental access response, then this Stochastic accessing be judged as access failure, again initiate Stochastic accessing, until access success or sending times equal maximum reattempt times.
The process of the WIA-PA network handheld device Stochastic accessing routing device that Fig. 2 provides for the present embodiment, comprising:
Step 201: handheld device to be networked continues to monitor the available channel in WIA-PA network, obtain at networking by or the beacon frame that sends of gateway device;
Step 202: handheld device to be networked select to send beacon frame at net routing device as cluster head, the deadline is synchronous;
Step 203: handheld device to be networked triggers random access procedure by media interviews control MAC, selects random access guiding, and sends this random access guiding when channel idle at net routing device;
Step 204: after networking is by equipment Inspection to random access guiding, resolves the legitimacy of random access guiding, if legal, forwards this random access guiding to mesh network; Otherwise, then this random access guiding is abandoned;
Step 205: mesh network forwards this random access guiding to network manager;
Step 206: after the random access guiding that Secure Manager receives, by resolving random access guiding, carries out safety verification.Specifically comprise, send out random access guiding equipment be legitimate device, then safety verification success; Otherwise safety verification failure, abandons this access request.Wherein, the random access guiding that Secure Manager receives is forwarded by network manager, and the communication mode between Secure Manager and network manager does not specify;
Step 207: after safety verification success, send accidental access response by network manager, and send this accidental access response to mesh network;
Step 208: mesh network at networking by this accidental access response of device forwards;
Step 209: after net routing device receives accidental access response, forwards accidental access response to handheld device to be networked;
Step 2010: handheld device to be networked detects accidental access response, judges whether to access successfully according to relevant parameter in accidental access response; Or, at the appointed time, do not receive accidental access response, then this Stochastic accessing be judged as access failure, again initiate Stochastic accessing, until access success or sending times equal maximum reattempt times.
Wherein, random access guiding mentioned in step 103 and step 203, generated by the random access guiding generation module of handheld device, this module is present in WIA-PA higher level protocol suite, random access guiding is generated by it, this is leading should have high autocorrelation performance, low their cross correlation, constant amplitude and low peak average ratio feature, to increase the detection probability of cluster head, and reduces the misunderstanding probability of cluster head.Described random access guiding generation module can adopt permanent envelope zero auto-correlation (Constant AmplitudeZero Auto Correlation, CAZAC) sequence realizes, such as, can choose any one kind of them sequence to generate described random access guiding in Zadoff-Chu sequence, Frank sequence, Golomb sequence and Chirp sequence.And the following parameter that should comprise in this random access guiding: the globally unique 64 long addresses of described handheld device, the sending times of random access procedure and the life span of this random access guiding.In addition, handheld device also should comprise time block, for timing from when the handheld device networked triggers random access procedure.
Wherein, in step 104 and step 204, serve as cluster head by gateway device with at net routing device respectively, after cluster head detects random access guiding, resolved the legitimacy of random access guiding by validity judgement module.
In addition, in step 108 and step 2010, handheld device to be networked needs to judge that whether Stochastic accessing is successful, then handheld device to be networked need comprise judge module, and this module has following three kinds of effects:
1) for judging whether handheld device receives accidental access response in the Preset Time of setting, if not, then this random access procedure is judged as access failure; Otherwise, carry out subsequent processing steps.
2) for judging that can accidental access response that handheld device receives allow handheld device success access network, if not, is then judged as access failure by this random access procedure; Otherwise, access successfully.
3) for judging whether access failure number of times equals the maximum permission frequency of failure set, and if not, then, when channel idle, again initiates access procedure; Otherwise, then to upper strata report, processed by upper strata.
The simply and easy treat process of the WIA-PA network handheld device Network with Random Multiple Access System method that Fig. 3 provides for the present embodiment, comprising:
Step 301: handheld device to be networked continues to monitor the available channel in WIA-PA network, obtains the beacon sent at net routing device or gateway device;
Step 302: handheld device to be networked select to send beacon certain at networking by or gateway device as cluster head, the deadline is synchronous;
Step 303: this step is divided into following sub-step:
Step 3031: judge whether access failure number of times is less than the maximum permission frequency of failure of setting by judge module, if judged result is for being less than, then handheld device to be networked triggers random access procedure by media interviews control MAC; Otherwise, to upper strata report, processed by upper strata;
Step 3032: time block is also started working;
Step 3033: judge module is also for judging whether handheld device receives accidental access response in the Preset Time of setting, if not, then this random access procedure is judged as access failure; Otherwise, enter next step;
Step 3034: can accidental access response that handheld device receives allow the successful access network of handheld device, if not, is then judged as access failure by this random access procedure to use judge module to judge; Otherwise, access successfully.
Step 304: cluster head forwards legal random access guiding, cluster head is served as by gateway or at net routing device;
Step 305: by the random access guiding that other device forwards of WIA-PA network are legal.This step due to the equipment of serving as cluster head different, have some difference, specific as follows:
1) cluster head is gateway device, then gateway device forwards legal random access guiding directly to network manager;
2) cluster head is at net routing device, then need to forward this random access guiding by mesh network to network manager at net routing device.
Step 306: Secure Manager resolves random access guiding, carries out safety certification, safety verification success, then provide accidental access response by network manager;
Step 307: by other device forwards accidental access responses of WIA-PA network.This step due to the equipment of serving as cluster head different, have some difference, specific as follows:
1) cluster head is gateway device, then network manager forwards legal access response directly to gateway device;
2) cluster head is at net routing device, then network manager needs to be responded by this access of device forwards at networking by mesh network.
Step 308: handheld device to be networked detects accidental access response, judges whether to access successfully according to relevant parameter in accidental access response; Or, at the appointed time, do not receive accidental access response, then this Stochastic accessing be judged as access failure, again initiate Stochastic accessing, until access success or sending times equal maximum reattempt times.
The structural representation of the handheld device that Fig. 4 provides for the embodiment of the present invention, as shown in Figure 4, the method of the handheld device Stochastic accessing WIA-PA network supporting the present invention to propose for making WIA-PA handheld device, WIA-PA handheld device needs to comprise with lower module: random access guiding generation module 401, time block 402, judge module 403 and radio receiving transmitting module 404.Wherein, random access guiding generation module 401 is present in WIA-PA higher level protocol suite, by this CMOS macro cell random access guiding; Time block, for timing from when the handheld device networked triggers random access procedure; Judge module 403, for judging whether handheld device receives accidental access response in the Preset Time of setting, also for judging that can accidental access response that handheld device receives allow handheld device success access network, also for judging whether access failure number of times equals the maximum permission frequency of failure set; Radio receiving transmitting module 404 is for sending random access guiding and receiving access response.
The structural representation of the cluster head that Fig. 5 provides for the embodiment of the present invention, as shown in Figure 5, the method of the handheld device Stochastic accessing WIA-PA network supporting the present invention to propose for making cluster head, in WIA-PA network, cluster head needs to comprise with lower module: validity judgement module 501 and radio receiving transmitting module 502, as shown in Figure 5.Wherein, validity judgement module is for judging the legitimacy of random access guiding; Radio receiving transmitting module 502 for receiving and forwarding random access guiding, and receives and forwards access response.
What finally illustrate is, above preferred embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from claims of the present invention limited range.
Claims (9)
1. a method for WIA-PA network handheld device Network with Random Multiple Access System, is characterized in that: comprise the following steps:
Step one: handheld device to be networked continues to monitor the available channel in WIA-PA network, obtains the beacon frame sent at net routing device or gateway device;
Step 2: handheld device to be networked selects to send certain routing device of beacon frame or gateway device as cluster head, and the deadline is synchronous;
Step 3: handheld device to be networked triggers random access procedure by media interviews control MAC, first, selects random access guiding, then sends this random access guiding when channel idle to cluster head;
Step 4: after cluster head detects random access guiding, resolves random access guiding, judges the legitimacy of this random access guiding, if legal, forward this networking request to network manager and Secure Manager; Otherwise, then this random access guiding is abandoned;
Step 5: network manager and Secure Manager receive the random access guiding forwarded by cluster head, by resolving random access guiding, carrying out safety verification, providing accidental access response;
Step 6: send after random access guiding wait the handheld device networked, detect accidental access response, after receiving accidental access response, judge whether to access successfully according to relevant parameter in accidental access response; Or, at the appointed time, do not receive accidental access response, then this Stochastic accessing be judged as access failure, again initiate Stochastic accessing, until access success or sending times equal maximum reattempt times.
2. the method for a kind of WIA-PA network handheld device Network with Random Multiple Access System according to claim 1, it is characterized in that: in step 5, specifically comprise: if send out random access guiding handheld device be legitimate device, then by the safety verification of Secure Manager, network manager provides accidental access response, and sends accidental access response by WIA-PA network to described equipment; Otherwise, abandon this random access guiding.
3. the method for a kind of WIA-PA network handheld device Network with Random Multiple Access System according to claim 1, is characterized in that: the parameter comprised in random access guiding comprises: the globally unique 64 long addresses of described handheld device, the sending times of random access procedure and the life span of this random access guiding.
4. the method for a kind of WIA-PA network handheld device Network with Random Multiple Access System according to claim 1, is characterized in that: cluster head comprises validity judgement module, for judging the legitimacy of random access guiding.
5. the method for a kind of WIA-PA network handheld device Network with Random Multiple Access System according to claim 1, it is characterized in that: described handheld device comprises random access guiding generation module, this module is present in WIA-PA higher level protocol suite, random access guiding is generated by it, this is leading has high autocorrelation performance, low their cross correlation, constant amplitude and low peak average ratio feature, to increase the detection probability of cluster head, and reduce the misunderstanding probability of cluster head.
6. the method for a kind of WIA-PA network handheld device Network with Random Multiple Access System according to claim 1, is characterized in that: described handheld device comprises time block, for timing from when the handheld device networked triggers random access procedure.
7. the method for a kind of WIA-PA network handheld device Network with Random Multiple Access System according to claim 1, it is characterized in that: described handheld device comprises judge module, for judging whether handheld device receives accidental access response in the Preset Time of setting, if not, then this random access procedure is judged as access failure; Otherwise, carry out subsequent processing steps.
8. the method for a kind of WIA-PA network handheld device Network with Random Multiple Access System according to claim 7, it is characterized in that: described judge module, also for judging that can accidental access response that handheld device receives allow handheld device success access network, if not, then this random access procedure is judged as access failure; Otherwise, access successfully.
9. the method for a kind of WIA-PA network handheld device Network with Random Multiple Access System according to claim 7, it is characterized in that: described judge module, also for judging whether access failure number of times equals the maximum permission frequency of failure set, if not, then when channel idle, again initiate access procedure; Otherwise, then to upper strata report, processed by upper strata.
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