CN104025658A - Wireless communication system, control apparatus, and wireless communication method - Google Patents
Wireless communication system, control apparatus, and wireless communication method Download PDFInfo
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- CN104025658A CN104025658A CN201280062864.5A CN201280062864A CN104025658A CN 104025658 A CN104025658 A CN 104025658A CN 201280062864 A CN201280062864 A CN 201280062864A CN 104025658 A CN104025658 A CN 104025658A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/18—Communication route or path selection, e.g. power-based or shortest path routing based on predicted events
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
Abstract
The objective of the invention is to achieve high reachability with low delay through wireless communication with respect to mobile terminals by selecting, in a very short time, an optimum communication method of selecting relay stations or the like. A terminal or relay apparatus measures a communication quality between the terminal and the relay apparatus. A calculation apparatus calculates, on the basis of the communication quality information, a communication path for each of a plurality of pieces of environment information of the terminal. A control apparatus associates the communication paths with the respective ones of the plurality of pieces of environment information. When a communication with the terminal is performed, the control apparatus acquires the pieces of environment information of the terminal and searches the communication paths associated with those pieces of environment information. The control apparatus then performs the communication with the terminal via a relay terminal indicated by a communication path that has been found in the search.
Description
Technical field
The wireless communication system of the control device that the present invention relates to there is terminal and communicate via relay and terminal.
Background technology
Along with the standardization of the sensor network technique of cost degradation, the ZigBee etc. of WLAN and RFID, the application example of the wireless technology in industrial field increases in recent years.As industrial field, for example, can enumerate social infrastructure cause and FA (Factory Automation), PA (Plant Automation) etc.
On the other hand, in order to provide communication service to mobile terminal, there are multiple relay stations that the sphere of action that covers mobile terminal is set, suitably select the relay station selection mode of relay station.About such mobile body communication system, in patent documentation 1 and patent documentation 2, be recited as the relay station selection mode of mobile communicating.
In patent documentation 1, the base station that is connected with the multiple relay stations method based on representing to select from the electric field information of the incoming level of the wireless signal of moving body relay station is disclosed.
In addition, in patent documentation 2, disclose the central station being connected with multiple via nodes and collected the transmission quality information by electric field strength and the bit error rate etc. of wireless terminal instrumentation, selected the method for optimum relay station.
Prior art document
Patent documentation
Patent documentation 1: Unexamined Patent 7-193858 communique
Patent documentation 2: JP 2000-4469 communique
Brief summary of the invention
The problem that invention will solve
For using rfid technology in industrial field, require the higher attainability in certain time of delay of communication data.In industrial field, the requirement of the communication of the mobile terminal to waggon etc. in FA being carried out to wireless penetration is also stronger.Therefore, also same with other fixed terminals to the communication of mobile terminal, be required the higher attainability under low delay.In order to use radio communication to realize higher attainability for mobile terminal with low delay, need to select corresponding to the movement of terminal the optimum communication means of the selection etc. of relay station.
Patent documentation 1,2 does not limit for the moving range of mobile terminal, and the communication environment between mobile terminal and relay station is taking may be because the environment of the frequent variation of the impact of the variation of people or thing is as object.And instrumentation electric wave environment after the movement of wireless terminal, calculates and transmits quality according to its instrumentation result, selects optimum relay station.Therefore, spended time in the selection of optimum relay station, have from wireless terminal move to communication environment stable till the problem of spended time.
Summary of the invention
To this, in the present invention, using terminal mobile on the path predetermining as the mobile terminal of such as lift or waggon etc. in industrial field, in limited space as object.Due to mobile conditional terminal in the space less impact of the variation of people or thing, as object, so the variable of communication environment is less, and can be determined to moving range.And object is the optimum communication means of the selection by select relay station within little time etc., use radio communication to realize higher attainability for mobile terminal with low delay.
For the means of dealing with problems
The summary that representational content in invention disclosed is in this application described is simply as follows.
A kind of wireless communication system, terminal; Multiple link terminals, carry out radio communication with above-mentioned terminal; Calculation element, there is acceptance division and analysis portion, this acceptance division receives the communication quality information between above-mentioned link terminal and above-mentioned terminal and represents multiple environmental informations of the state of above-mentioned terminal, this analysis portion, based on above-mentioned communication quality information and above-mentioned multiple environmental information, is set up corresponding by the communication path being made up of above-mentioned link terminal and above-mentioned terminal with the each environmental information in above-mentioned multiple environmental informations; And control device, there is recording unit and retrieval process portion, this recording unit keeps above-mentioned environmental information to set up the 1st corresponding control and management table with said communication paths, the above-mentioned environmental information that this retrieval process portion obtains when communicating with above-mentioned terminal is retrieved said communication paths from above-mentioned the 1st control and management table, and this control device communicates via the above-mentioned link terminal and the above-mentioned terminal that form the above-mentioned communication path retrieving.
Invention effect
According to the present invention, can use radio communication to realize higher attainability to mobile terminal with low delay.
Brief description of the drawings
Fig. 1 is the summary construction diagram of the wireless communication system of embodiment 1.
Fig. 2 is the FBD (function block diagram) of the control device of embodiment 1.
Fig. 3 is the FBD (function block diagram) of the link terminal of embodiment 1.
Fig. 4 is the FBD (function block diagram) of the wireless terminal of embodiment 1.
Fig. 5 is the FBD (function block diagram) of the calculation element of embodiment 1.
Fig. 6 is the sequential chart of obtaining processing that represents the communication quality information of embodiment 1.
Fig. 7 is the figure of the network analysis processing of the calculation element of explanation embodiment 1.
Fig. 8 (a) is the figure that represents the control and management table of embodiment 1.
Fig. 8 (b) is the figure that represents the control and management table of embodiment 1.
Fig. 9 is the figure that represents the status change model of embodiment 2.
Figure 10 is the FBD (function block diagram) of the control device of embodiment 3.
Figure 11 is the figure that represents the control and management table of embodiment 3.
Figure 12 (a) is the figure that represents the packet format of embodiment 1.
Figure 12 (b) is the figure that represents the packet format of embodiment 1.
Figure 13 is the figure of the hardware configuration of the control device that represents embodiment 1, link terminal, wireless terminal.
Figure 14 is the flow chart that represents the action of the calculation element 105 of embodiment 1.
Embodiment
Embodiment 1
Use Fig. 1 to Fig. 8 and Figure 12 to Figure 14, the first execution mode of the present invention is described.
Fig. 1 represents the piece figure of the wireless communication system of embodiment 1.Wireless communication system possesses control panel 101, control device 102, link terminal 103, wireless terminal 104, calculation element 105.These devices interconnect by wired or wireless.
Particularly, control panel 101, link terminal 103, calculation element 105 are to be wiredly connected to control device 102, and wireless terminal 104 is connected with link terminal 103 with wireless.Link terminal 103, except the method being directly connected with control device 102, also can connect via other link terminals 103.In Fig. 1, represent directly to connect link terminal A for control device 102, link terminal B, C are connected to the example of control device 102 via link terminal A.
In addition, in the present embodiment, using terminal mobile on the path predetermining as the mobile terminal of such as lift or waggon etc. in industrial field, in limited space as object.Due to using in the less space of the impact of the variation of people or thing, mobile conditional terminal is as object, so it is characterized in that, the variable of people or thing is less, and communication environment exists with ... the state of the terminals such as terminal location significantly.And then, it is characterized in that determining the moving range of terminal.
In the present embodiment, utilization is such environment this point, for the state of various terminals, optimum relay is set up corresponding based on communication quality.And, in the time that control device and terminal communicate, according to the state of the terminal in management, use above-mentioned corresponding relation to determine optimum relay.Thus, can within little time, select optimum relay.
Control panel 101 communicates and the collection of the information of carrying out and the control of each terminal (link terminal 103, wireless terminal 104) with the each terminal in wireless communication system.The control of each terminal can enumerate the startup of terminal and stop, position and mobile control etc.Therefore, control panel 101 to represent wireless terminal 104 startup, stop, the environmental information of mobile medium state and position, speed etc. manages.Control panel 101 by the environmental information of each terminal termly or be used for sending to control device 102 together with the control information of control terminal.
Control device 102 is controlled with communicating by letter of each terminal room control panel 101.Particularly, obtain the communication of sending to terminal from control panel 101, carry out to the Control on Communication of communication path selection of terminal etc.Equally, obtain the communication of sending to control panel 101 from terminal, pass on processing to control panel 101.In addition, control device 102 is collected the environmental information in wireless communication system, when communicate control time, by carrying out optimum Control on Communication with reference to this environmental information.Here, so-called environmental information, is the information of the situation in the wireless communication system of position, speed etc. of connection (ON)/disconnection (OFF) state of representing the power supply of terminal and wireless terminal 104.
Link terminal 103 communicates via control panel 101 and control device 102 with wireless terminal 104.These terminals possess and in the situation that are obtaining the transmission quality information of receiver via wireless receiving to bag, and append in bag and the mechanism that sends or directly send to calculation element 105.In addition, link terminal 103 also carries out the processing of passing on of the bag sent here from control device 102 or wireless terminal 104, other link terminals 103.
Calculation element 105 is collected the environmental information of wireless communication system and the transmission quality information of each wireless communication link, calculates by each environment the method that control panel 101 and communicating by letter of each terminal room are optimum Control on Communication.And, by control device 102 being set to the communication control method calculating, the optimization of communicating by letter by control panel 101 with each terminal room.
Figure 13 is the hardware structure diagram of control device 102, link terminal 103, wireless terminal 104.Each terminal is made up of CPU (Central Processing Unit) 1302, working storage 1303, program storage 1304, logical circuit 1305, communication interface I/F1306, radio-circuit RF1307, input/output unit 1310, interconnects via bus 1308.
Working storage 1303 be in the processing of each program by the storage area of Interim use, in program storage 1304, record the various programs such as input/output routine 1311 and pack receiving and transmitting program 1312.CPU1302, by reading and the program of executive logging in program storage, realizes various functions.Logical circuit 1305 is the electronic circuits that carry out logical operation processing, uses ASIC or FPGA, DSP, DRP etc.Each functional block shown in Fig. 2～Fig. 4 described later is by being carried out by CPU1302 or working storage 1303, program storage 1304, logical circuit 1305 coordinations.In addition, certainly can suitably change each function logical circuit is carried out still and processed with CPU.
Communication interface I/F1306 and radio-circuit RF1307 are by the data of supplying with from CPU1302 or working storage 1303, program storage 1304, logical circuit 1305 to outside equipment output, or the data that the equipment from outside is supplied with are to supplies such as CPU1302.Communication interface I/F1306 represents wired interface, and radio-circuit RF1307 represents wireless interface.Input/output unit 1310 is devices of keyboard or mouse, display etc., and manager carries out the setting of each terminal via these devices.These input/output units 1310 also can connect via network.
Fig. 2 is the FBD (function block diagram) of the control device 102 of the first execution mode of the present invention.Control device 102 possesses Return Reception Dept. 201, transmission processing portion 202 and communication process portion 203.
Communication process portion 203 is made up of the recording unit 221 of bag handling part 211, retrieval process portion 212, bag analysis unit 213, environmental information management portion 214, transmission bag management department 215, control part 216, retentive control admin table.
On the up direction to control panel 101, communication process portion 203 carries out extracting communication quality information the multiple bags from being received by multiple communication paths, and the processing that multiple bags are collected.In addition, on the down direction to wireless terminal 104, obtain control information from the retrieval process based on packet header, wrap processing based on control information.
The bag receiving is sent to bag handling part 211 by Return Reception Dept. 201, if transmission processing portion 202 receives bag from bag handling part 211, bag sent to output port.
Bag handling part 211 is stored into the bag receiving in buffer, and the duplicate of bag is sent to bag analysis unit 213, and the header of bag is sent to retrieval process portion 212.If bag handling part 211 receives result for retrieval from retrieval process portion 212, processing is wrapped in the control information based on comprising in result for retrieval, sends bag to transmission processing portion 202.In the time of the transmission of bag, the packet identifier receiving from transmission bag management department 215 is appended to bag.In addition, in the communication of the down direction to wireless terminal, include the instrumentation instruction of communication quality in result for retrieval, added communications quality meter mark will also sends to transmission processing portion 202.
On the down direction to wireless terminal 104, if retrieval process portion 212 receives header from bag handling part 211, retrieve control and management table, the result of retrieval process is sent to bag handling part 211.In result for retrieval, comprise the control information of describing the processing method that has bag.In addition, retrieval process, except being included in the destination in packet header, is also used the environmental information receiving from environmental information management portion 214.In Fig. 8, represent an example of control and management table.Fig. 8 (a) represents suitable control information have been set up for each environmental information of each terminal by calculation element the example of corresponding control and management table.The example of control and management table when in addition, the calculating of Fig. 8 (b) expression calculation element starts.
Control and management table is made up of destination 801, environmental information 802, control information 803.As environmental information 802, can enumerate the positional information of wireless terminal 104.Or, can be also velocity information, acceleration information, the ON/OFF state of terminal power supply, other sensor informations of terminal, can be also their combination.
Control information 803 is made up of routing information (831,832), control project 833.Routing information, except the communication path using in common communication, also can also keep rear backup path for subsequent use.The in the situation that of there is multiple path in communication path, bag is copied and send to each path.In addition control project, 833 is recorded the project of appending control about transmission.As control project 833, transmission times that can specific radio interval, with error correcting code additional redundancy figure place, error correcting system etc.By appending like this control project, be not only the selection of optimum relay, can also carry out the optimum Control on Communication corresponding with each environmental information of wireless terminal.In addition, in corresponding environment, do not collect the communication quality information of wireless communications path, can also specify the control of instrumentation instruction communication quality.In addition, in order to follow the time fluctuation of communication path, can also send termly the instrumentation instruction of this communication quality.In the time of the instrumentation of instruction communication quality, also can comprise backup path alternatively and send.By backup path is also sent, communication quality that can also instrumentation backup path, can carry out reappraising of optimal path.
The retrieval of the control and management table in retrieval process portion 212 is implemented taking destination and environmental information as keyword.Retrieval is undertaken by the order of destination 801, environmental information 802, exists multiple in the situation that in environmental information 802, retrieves according to the priority of specifying in advance.In the present embodiment, with after 801 retrievals of destination, retrieve the position 821 of wireless terminal A, the position 822 of wireless terminal B.
For example, in the case of the wireless terminal A104 in position X2 sends, select the row of wireless terminal A as destination 801, by the position X2 lock line again of wireless terminal A.Because the position of wireless terminal B is asterisk wildcard, so select from upper the 2nd entry.Therefore, the communication from control device to wireless terminal A is that link terminal A, B carry out via communication path (1) (2), with the additional redundancy figure place of error correcting code be N.
In addition, the in the situation that of retrieval wireless terminal B 104 too, with the position of wireless terminal A, the location retrieval of wireless terminal B.In this embodiment,, send with path (2) (3) in X5 in the situation that at wireless terminal A.Like this, by the position of the terminal beyond destination is also contained in environmental information and is retrieved, in the case of occur due to the movement of terminal also can be corresponding the covering of communication path, communication environment variation.In addition, the priority of environmental information when retrieval also can be by each destination setting.
In addition, as another form that has the search method in the situation of multiple environmental informations, the entry that also can use using entries many consistent project as the method for result for retrieval, further project is weighted and is evaluated, unanimously degree is the highest is as the method for result for retrieval.
If bag analysis unit 213 receives copying of bag, the parsing of the bag receiving from bag handling part 211.Be taking control panel 101 as destination, be attached with communication quality instrumentation mark, in bag, comprise wireless communication quality at reception bag, the packet identifier comprising in bag and wireless communication quality are taken out, these information are sent to calculation element 105.Transmission to calculation element 105 both can send in the time receiving corresponding bag, also can store and send termly.
In addition, be to include the bag of the environmental information sending to control device 102 from control panel 101 at the bag receiving, environmental information is sent to environmental information management portion 214.
Environmental information management portion 214 manages from the environmental information that receives of bag analysis unit 213, termly or in the case of environmental information changed certain above in the situation that or from retrieval process portion 212 arrived ask to retrieval process portion 212 notification ring environment informations.Equally, in the case of the obtaining request of environmental information of having arrived from transmission bag management department 215, to sending bag management department 215 notification ring environment informations.Represent terminal state environmental information from control panel termly or be sent to control device together with control signal, and managed by environmental information management portion 214.
In the situation that environmental information being sent, this control signal is sent to terminal together with control signal from control panel 101 or environmental information is sent termly and this transmission interval enough short and can guarantee real-time, environmental information former state is sent to other functional blocks (retrieval process portion 212, send bag management department 215).In addition, by adding to environmental information such as the information of the variation of speed, acceleration etc., situation can be classified meticulously, can realize the raising of communication quality.
On the other hand, in the case of environmental information is sent and the transmission interval of environmental information grows termly from control panel 101, due to the movement of wireless terminal, the difference of the environmental information of being managed by environmental information management portion and up-to-date environmental information becomes significantly, likely can not select optimum link terminal.So, in environmental information management portion 214, according to the environmental information of the variation prediction current time of environmental information, this predicted value is sent to other functional blocks.The prediction of environmental information is used linear approximation or other approximation methods to calculate.In the situation that environmental information is positional information, also can calculate predicted value according to translational speed or acceleration etc.
Send bag management department 215 and manage packet identifier and the daily record of communication quality instrumentation of identifying uniquely the transmission bag transmitting to each terminal from control panel 101.For the size that makes identification code diminishes, also can be by other the head value such as packet identifier and destination-address be combined to become unique mode and sets packet identifier.In addition, the daily record of communication quality instrumentation is the daily record of supervisory packet identification code and environmental information, the environmental information when bag that record is identified by packet identifier sends.This is for environmental information being set up corresponding with communication quality instrumentation result in the time receiving communication quality instrumentation result.Bag handling part, sending when bag, is accepted packet identifier from sending bag management department, and appends in bag and send.
If send bag management department, the bag that has communication quality instrumentation mark is paid to packet identifier, from environmental information management portion environment of accepting information, environmental information when packet identifier is sent with bag adds up to and keeps as the daily record of communication quality instrumentation.The daily record of communication quality instrumentation is sent to calculation element 105 termly.
Control part 216 is connected with each functional block of control device 102, carries out setting and the renewal of parameter and pattern, control and management table.When carry out the setting change of control device 102 from the outside equipment of calculation element 105 grades, the setting of changing each functional block via control part 216.
Office terminal 204 is connected on control part 216.Manager can change various parameters or control and management table that each functional block is set via office terminal 204.In addition, office terminal 204 also can be connected on control part 216 via network.
Fig. 3 is the FBD (function block diagram) of the link terminal 103 of embodiment 1.Link terminal 103 by with control device or other link terminals with the wired transmission processing portion 304 of wired transceiving data, wired Return Reception Dept. 303, with wireless transmission handling part 302, the wireless receiving handling part 301 of wireless and wireless terminal transceiving data and the communication process portion 305 processing of passing on that implements to receive data form.
Communication process portion 305 has the interface function of accepting communication quality information from wireless receiving handling part 301, if receive the bag with communication quality instrumentation mark from wireless receiving handling part 301, communication quality information is appended to receive and wraps and pass on processing.Communication quality information is the value that receives electrolysis strength, bit error rate or calculate according to these information.
Fig. 4 represents the FBD (function block diagram) of the wireless terminal 104 of embodiment 1.Wireless terminal 104 is made up of wireless transmission handling part 402, wireless receiving handling part 401 with wireless and link terminal transceiving data and the communication process portion 403 that receives the processing of data.Communication process portion 403 has the interface function of accepting communication quality information from wireless receiving handling part 401.In addition, if receive the bag with communication quality instrumentation mark from wireless receiving handling part 401, keep as group using the packet identifier receiving with from the communication quality information of wireless receiving handling part 401, and to additional these information of foldback bag.Foldback is coated with added communications quality meter mark will, is sent to whole link terminals 103.
Fig. 5 is the FBD (function block diagram) of the calculation element 105 of embodiment 1.Calculation element 105 is made up of CPU (Central Processing Unit) 502, working storage 503, program storage 504, storage device 505, communication I/F506, input/output unit 507, interconnects via bus 508.
Working storage 503 is temporary transient storage areas that use in the processing of each program.Program storage 504 records the various programs of carrying out input/output routine 511, pack receiving and transmitting program 512, data base administrator 513, communication quality information analysis program 514, communication quality instrumentation daily record analysis program 515, network analysis program 516, network information display routine 517 and control device setting change program 518.CPU502, by reading and the various programs of executive logging in program storage 504, carries out various functions.
In storage device 505, preserve the statistical information data storehouse that the daily record of communication quality instrumentation and communication quality information etc. to receiving from control device 102 or each terminal manage.Communication interface I/F506 will export to outside equipment from the data of CPU502 or memory supply, or the data that the equipment from outside is supplied with are supplied with to CPU502 or memory.Input/output unit 507 is devices of keyboard, mouse, display etc., and manager carries out the setting of calculation element 105 via these devices.These input/output units 507 also can connect via network.
In the flow chart of Figure 14, represent the flow process of the basic handling of calculation element 105.The processing of calculation element 105 starts action in the time of network struction.One example of the control and management table of the initial condition while representing network struction here, in Fig. 8 (b).The control and management table of initial condition only records the control information 803 of each destination 801, there is no the condition about environmental information 802.And, path is made as to the All Paths that can get, thereby will be set as maximum to the attainability of wireless terminal 104.Meanwhile, the instrumentation of designated communication quality in order to make control and management table, thereby the collection of learning needed statistical information.,, under initial condition, via whole link terminals, each wireless terminal is sent the request of communication quality instrumentation.
Calculation element 105, after action starts, carries out the storage (step 1401) of statistical information.Here, so-called statistical information, refers to communication quality information and the daily record of communication quality instrumentation.If stored certain during or the statistical information of some, calculation element 105 is implemented network analysis processing.By network analysis processing, make the control and management table (step 1402) of realizing optimal control.The control and management table of newly making and control and management table are in the past compared to (step 1403), in the situation that having renewal place, control and management table is set in control device 102 (step 1404).Then, the control and management table of producing and control and management table are in the past compared, judge whether the study of control and management table stablizes (step 1405).Being judged as study stable in the situation that, be judged as the control method of having determined corresponding wireless communication system, finish the action of calculation element 105.Being judged as in the unsettled situation of study, return to step 1401.
Whether stable judgement is evaluated by the variation of past control and management table several times in study.Particularly, if the communication path corresponding with each environmental information of each wireless terminal do not change, be judged as stable.Or the situation about being changed to below setting of the communication quality under each environmental information of each wireless terminal judges as stable.In the case of the release of calculation element 105, calculation element 105 can be cut off and uses from this wireless communication system.
In addition, in the case of needs tackle rapidly environment that wireless communications environment at every moment may change or the environmental change that brings because of terminal abnormal, also can in step 1405, always be judged as " learning unstable ", calculation element 105 is always moved.In addition, also can calculation element 105 always be moved in order to grasp the communication quality of network in real time, always collect statistical information.
In the present embodiment, represented calculation element 105 directly and the system configuration example of control device 102 wired connections, but can be also the structure that is connected to control device via network.In addition also calculation element 105 can be configured in data center.And then, also can be set as directly and the structure of control device 102 wired connections in the starting stage of making control and management table, in the operational phase after control and management table is set, be configured in data center and be set as the always structure of action.
By carrying out input/output routine 511, carry out the data transmit-receive processing from input/output unit 507.By carrying out pack receiving and transmitting program 512, carry out the transmitting-receiving processing via the bag of communication interface I/F506.Carry out management statistics information database by executing data library manager 513.By executive communication quality information analysis program 514, receive the communication quality information of sending here from control device 102 or link terminal 103, wireless terminal 104, be saved in statistical information data storehouse via data base administrator 513.By executive communication quality instrumentation daily record analysis program 515, receive the communication quality instrumentation daily record of sending here from control device 102, be saved in statistical information data storehouse via data base administrator 513.By carrying out network analysis program 516, analyze the communication quality information and the daily record of communication quality instrumentation that are kept in statistical information data storehouse, the optimum control method of Analysis Control Unit 102, generates the control and management table that is stored in control device 102.About an example of analytical method, use Fig. 7 to narrate in the back.
By carrying out network information display routine 517, by the terminal comprising in cordless communication network, be shown on output device to the communication path of this terminal and the communication quality of each communication link.
Set change program 518 by carrying out control device, control device 102 is set via the control part 216 of control device 102 analyzing by network analysis program 516 the control and management table obtaining.
Fig. 6 is the sequential chart that represents the collection and treatment of communication quality information and the manufacture method of communication quality instrumentation daily record.In Fig. 6, represent the wireless terminal A104 example the communication quality between instrumentation link terminal A and B on specific position.For example, be to carry out study, corresponding situation has been set up to specific position in path (1) (2) according to the control and management table of the initial condition shown in Fig. 8 (b).
The collection of communication quality information utilizes commonly to be carried out to the communication of wireless terminal 104 from control panel 101.When control device 102 passes on the communication from control panel 101 601 while processing, added communications quality meter mark will and packet identifier pass on (step 621).
Passing on of control device 102 processed from control and management table selecting paths (1) and path (2), sends (602,603) to each path.In path (1), arrive wireless terminal A104 via link terminal A103.Receive the wireless terminal A104 of bag via wireless communications path due to communication quality instrumentation mark, so calculate the communication quality wrapping while reception, keep (step 622) together with the packet identifier comprising in the bag receiving.In path (2), arrive wireless terminal A104 via link terminal B103.
Wireless terminal A104 is same with path (1), due to communication quality instrumentation mark, so calculate the communication quality wrapping while reception, keeps (step 623) together with the packet identifier comprising in the bag receiving.Then, wireless terminal A104 makes the foldback bag (step 624) to control panel 101.Foldback bag uses the packet identifier of the bag receiving from control panel 101, except the communication quality information receiving with path (1) and the communication quality information receiving with path (2), also formulate communication environment instrumentation mark and send (604).
The multicast that uses whole link terminals 103 to receive sends foldback bag to control panel 101.Receive the link terminal A103 of this foldback bag and B to wrapping the additional communication quality (step 625,626) measuring, pass on respectively (605,606) to control device 102.In the situation that link terminal C103 has also received foldback bag, to bag added communications quality, pass on to control device 102.By appending the communication quality instrumentation result in link terminal, can increase instrumentation mark, improve communication quality instrumentation precision.
In control device 102, extract packet identifier and the communication quality information (step 627) of each communication path from the foldback bag receiving from multiple link terminals 103.About foldback bag, based on packet identifier, multiple foldback bags being collected is one and pass on (607) to control panel 101.In addition the packet identifier extracting, and communication quality information are sent to calculation element 105 (608) at every turn or after being stored some.The daily record of communication quality instrumentation is sent to calculation element 105 (609) termly.In addition, needs when aiming at communication quality instrumentation day being analyzed by measuring device, so as long as send and just can according to the frequency of analyzing.In the situation that making as described above calculation element always move, always collecting statistical information, need to send termly.
In addition, as the collection method of communication quality information, also can be kept respectively by link terminal 103 and wireless terminal 104 group of packet identifier and communication quality information, directly send (611,612,613) to calculation element 105 termly.
In Figure 12 (a), represent the structure example of the bag of control device 102 when passing on from the communication of control panel 101.Bag 1201 by 1211 and data 1212 form, in 1211, comprise the control information needing of destination-address 1221 and transmission source address 1222, link terminal address 1223, communication quality instrumentation mark 1224, packet identifier 1225 etc. in passing on of network etc.In data 1212, preserve the control information sending to wireless terminal 104 from control panel 101.
In Figure 12 (b), represent the structure example from the foldback bag of wireless terminal.For foldback bag 1202 having been added to the structure of the communication quality information 1213 in each path.In communication quality information 1213, the information that comprises identification communication link and receiving terminal and its communication quality information.
Fig. 7 represents calculation element 105 analyzing communication quality information and the daily record of communication quality instrumentation, and determines the figure of the example of the method for optimum relay according to each environmental information of terminal based on communication quality.To be the figure that axle has been described communication quality by the daily record of communication quality instrumentation with communication quality information packet identifier foundation terminal location associated, that get wireless terminal A104.
By carrying out network analysis program 516, position is divided into the interval of variable length based on certain interval or communication quality value, in each interval, communicate the selection in the good path of quality.For example show in the time of terminal location X2, set communication quality and exceed the path (1) of threshold value and (2) example as path.In addition, also can as the situation of terminal location X1, X3, X5, set backup path.
In the present embodiment, represent by the grade classification of communication quality to be the example of two, but also can be divided into multiple grades, changed control method according to each grade.
In addition, in Fig. 7, represented taking position to be the example of transverse axis analyzing communication quality, but also can add ON/OFF of speed or acceleration, power supply etc. and in multidimensional, evaluate communication quality.For example, by add velocity information, can control for make translational speed faster wireless terminal 104 via the link terminal 103 with the large-scale comunication area.
In addition, in the present embodiment, be divided into control device 102 and calculation element 105 is described, but in order to reduce device number of packages, also control device 102 and calculation element 105 can be merged into a device.Structure is now the program storage 504 for calculation element 105, and the handling procedure that is equivalent to the communication process portion 203 of control device 102 appends the form of action.
Embodiment 2
Use Fig. 9 that the second execution mode of the present invention is described.In the second execution mode of the present invention, the adquisitiones difference of the environmental information of control device 102.In the first embodiment, represent to obtain from control panel 101 example of environmental information.In a second embodiment, resolve to infer environment by the control communication of the various terminals of bag analysis unit 213 subtend by control device 102.Can be applicable to control via this cordless communication network the situation of the motion of wireless terminal 104.
Fig. 9 is the figure that represents an example of the estimation method that wraps the environmental information in analysis unit 213, represents the status change model of wireless terminal A104.Wireless terminal 104 reciprocating example in left and right before link terminal ABC103 has been carried out modelling by this example.State S1 represents the halted state (901) at left end place, and state S3 represents the halted state (903) at right-hand member place, and state S2, S4 represent the state (902,904) in movement.For example, be state S1 at wireless terminal A104, when wireless terminal A104 is moved right, send the control message of " moving right " from control panel 101 to wireless terminal A104.Control device 102 can be with the opportunity that is received as of this control bag, and the state of identifying is S1, stops at left end.In addition, resolve by the response message of the expression confirmation of receipt to sending to control panel 101 from wireless terminal A104, can judge whether actual control, can grasp reliably status change.If status change is S2 and starts to move,, in control device 102, can infer terminal location (921) according to speed a and elapsed time t.Such status transition chart is left in the bag analysis unit 213 in control device 102, by the bag through control device 102 is resolved, can carry out the detection of status change and the supposition of environmental information.
In addition,, as other adquisitioneses of environmental information, also can use the sensor information being obtained by link terminal 103 or wireless terminal 104.As an example of sensor information, the characteristic quantity that can enumerate and use the positional information, velocity information, camera images of GPS, camera images is resolved and obtain etc.The sensor device of GPS etc. is connected in the bus 1308 of the terminal shown in Figure 13, and link terminal 103 or wireless terminal 104 use sensor device to obtain sensor information.Link terminal 103 or wireless terminal 104 send obtained sensor information to control device 102.Sending method has method additional in the time making foldback bag and generates termly the method for the bag that is equipped with environmental information.
The environmental information management portion 214 of control device 102 keeps the environmental information receiving from each terminal, for retrieval process.In addition,, in environmental information management portion 214, in the situation that being difficult to guarantee real-time, as required, the instrumentation moment based on environmental information is inferred current environmental information.As an example of estimation method, the method for with good grounds terminal velocity and the elapsed time computed position information from the instrumentation moment, the method for linear approximation etc. of carrying out based on the positional information of regularly sending here.
In addition, as other environmental information, also can adopt the elapsed time receiving from after the specific order of control panel 101.For example, by using the elapsed time after the power source ON instruction sending to equipment as environmental information, can realize the control of considering the noise of generation when terminal starts, the network control of also taking into account by the phenomenon of middle generation during certain after controlling.
In addition, obtaining also of environmental information can be used the Combination of Methods shown in the first embodiment and the second embodiment.
Embodiment 3
Use Figure 10, Figure 11 that the 3rd execution mode of the present invention is described.In the 3rd execution mode of the present invention, the search method difference when packet transfer being undertaken by the communication process portion of control device 102 is processed.
Figure 10 is the FBD (function block diagram) of the control device 102 of the 3rd execution mode of the present invention.For the first execution mode having been added to the form of control and management table renewal handling part 1001.Control and management table upgrades handling part 1001 and keeps the multiple control and management tables 1002 corresponding with environmental information.And control and management table upgrades handling part 1001 and obtains environmental information from environmental information management portion 214, according to the variation switching controls admin table 1002 of environmental information.
The control and management table 1002 using in the present embodiment, except the control table of Fig. 8 of representing in the first embodiment, also can also use the control and management table 1102 shown in Figure 11.
Figure 11 is the figure that represents the minimal structure of the control and management table of the present embodiment.Control and management table 1102 is the tables that record control information 1103 by each destination 1101.Compared with Fig. 8, do not comprise environmental information this point difference.Therefore, the retrieval process portion 212 of control device 102 carries out the retrieval as keyword taking destination.Like this, by control and management table being suppressed littlely, reducing search key, can shorten the time that retrieval process spends compared with the first execution mode.
That is, in the first embodiment, in control and management table, there is the control information corresponding with whole environmental informations, with respect to this, in the present embodiment, in control and management table, there is the control information corresponding with current environmental information.And in the present embodiment, switching controls table in the time that environmental information changes, can be suitable for the Control on Communication of each environmental information thus.
, environmental information be divided into the environmental information comprising in the condition in control and management table and be not included in control table and upgrade by control and management table the environmental information that handling part 1001 monitored states change and manage.
As the concrete example with which management by methods by environmental information, for example can enumerate, for upper compared with circlet environment information (variation of time, represent the environmental information of startup, the halted state of terminal, the positional information of mobile less terminal), control and management table as shown in Figure 10 upgrades handling part 1001 monitored states to be changed, for the larger environmental information of upper variation of time, be included in the method in the control and management table shown in Fig. 8.About other functional blocks, same with the first execution mode.
Above, embodiments of the present invention are illustrated, but the present invention is not limited to above-mentioned execution mode, can carries out various distortion and implement, those skilled in the art should be understood that can be appropriately combined by the respective embodiments described above.
Description of reference numerals
101: control panel
102: control device
103: link terminal
104: wireless terminal
105: calculation element
201: Return Reception Dept.
202: transmission processing portion
203: communication process portion
204: office terminal
211: bag handling part
212: retrieval process portion
213: bag analysis unit
214: environmental information management portion
215: send bag management department
216: control part
221: recording unit
301: wireless receiving handling part
302: wireless transmission handling part
303: wired Return Reception Dept.
304: wired transmission processing portion
305: communication process portion
401: wireless receiving handling part
402: wireless transmission handling part
403: communication process portion
502：CPU
503: working storage
504: program storage
505: storage device
506：I/F
507: input/output unit
511: input/output routine
512: pack receiving and transmitting program
513: data base administrator
514: communication quality information analysis program
515: communication quality instrumentation daily record analysis program
516: network analysis program
517: network information display routine
518: control device is set change program
Claims (15)
1. a wireless communication system, is characterized in that, possesses:
Terminal;
Multiple link terminals, carry out radio communication with above-mentioned terminal;
Calculation element, there is acceptance division and analysis portion, this acceptance division receives the communication quality information between above-mentioned link terminal and above-mentioned terminal and represents multiple environmental informations of the state of above-mentioned terminal, this analysis portion, based on above-mentioned communication quality information and above-mentioned multiple environmental information, is set up corresponding by the communication path being made up of above-mentioned link terminal and above-mentioned terminal with the each environmental information in above-mentioned multiple environmental informations; And
Control device, there is recording unit and retrieval process portion, this recording unit keeps above-mentioned environmental information to set up the 1st corresponding control and management table with said communication paths, the above-mentioned environmental information that this retrieval process portion obtains when communicating with above-mentioned terminal is retrieved said communication paths from above-mentioned the 1st control and management table, and this control device communicates via the above-mentioned link terminal and the above-mentioned terminal that form the above-mentioned communication path retrieving.
2. wireless communication system as claimed in claim 1, is characterized in that,
Above-mentioned terminal moves on the path predetermining.
3. wireless communication system as claimed in claim 1, is characterized in that,
Above-mentioned environmental information is the positional information of above-mentioned terminal.
4. wireless communication system as claimed in claim 1, is characterized in that,
Above-mentioned control device is obtained above-mentioned environmental information from controlling the control panel of above-mentioned terminal.
5. wireless communication system as claimed in claim 1, is characterized in that,
Above-mentioned control device has analysis unit, and this analysis unit keeps the status change model of above-mentioned terminal, and the control information that uses above-mentioned status change model to send the control panel from controlling above-mentioned terminal is resolved, thereby infers above-mentioned environmental information.
6. wireless communication system as claimed in claim 1, is characterized in that,
Above-mentioned control device sends to above-mentioned terminal for the each environmental information in above-mentioned multiple environmental informations by the request signal of the instrumentation of the above-mentioned communication quality of request;
Receive each link terminal in the above-mentioned multiple link terminals of above-mentioned terminal instrumentation of above-mentioned request signal and the above-mentioned communication quality between above-mentioned terminal;
Above-mentioned analysis portion, for the each environmental information in above-mentioned multiple environmental informations, is calculated the communication path that the above-mentioned communication quality measuring exceedes the threshold value of regulation.
7. wireless communication system as claimed in claim 1, is characterized in that,
Control device has renewal handling part, this renewal handling part keeps not comprising above-mentioned environmental information and above-mentioned terminal and said communication paths is set up to the 2nd corresponding control and management table, and according to the variation of above-mentioned environmental information, switch above-mentioned the 1st control and management table and above-mentioned the 2nd control and management table.
8. wireless communication system as claimed in claim 1, is characterized in that,
Above-mentioned control device also has environmental information management portion, and this environmental information management portion predicts up-to-date environmental information according to the above-mentioned environmental information obtaining;
The above-mentioned up-to-date environmental information retrieval of above-mentioned retrieval process portion's use said communication paths.
9. wireless communication system as claimed in claim 1, is characterized in that,
Above-mentioned acceptance division regularly receives above-mentioned communication quality information and above-mentioned environmental information;
Above-mentioned analysis portion is used the above-mentioned communication quality information and the above-mentioned environmental information that regularly receive to upgrade above-mentioned the 1st control and management table.
10. wireless communication system as claimed in claim 1, is characterized in that,
Above-mentioned control device and above-mentioned calculation element are made up of 1 device.
11. 1 kinds of control device, is characterized in that having:
Recording unit, keep the 1st control and management table, the 1st control and management table is the communication quality information between each link terminal and the terminal based in multiple link terminals and the multiple environmental informations that represent the state of above-mentioned terminal, and the communication path being made up of above-mentioned link terminal and above-mentioned terminal is set up to corresponding table with the each environmental information in above-mentioned multiple environmental informations; And
Retrieval process portion, the above-mentioned environmental information obtaining when communicating with above-mentioned terminal is retrieved said communication paths from above-mentioned the 1st control and management table;
Above-mentioned control device communicates via the above-mentioned link terminal and the above-mentioned terminal that form the above-mentioned communication path retrieving.
12. control device as claimed in claim 11, is characterized in that,
Above-mentioned environmental information is the positional information of the terminal of movement on the path predetermining.
13. control device as claimed in claim 11, is characterized in that,
Above-mentioned control device is obtained above-mentioned environmental information from controlling the control panel of above-mentioned terminal.
14. control device as claimed in claim 11, is characterized in that,
Also have environmental information management portion, this environmental information management portion predicts up-to-date environmental information according to the above-mentioned environmental information obtaining;
The above-mentioned up-to-date environmental information retrieval of above-mentioned retrieval process portion's use said communication paths.
15. 1 kinds of wireless communications methods, it is the wireless communications method of wireless communication system, above-mentioned wireless communication system has terminal, carries out multiple link terminals of radio communication with above-mentioned terminal, the control device communicating with above-mentioned terminal via above-mentioned multiple link terminals and the calculation element being connected with above-mentioned control device, this wireless communications method is characterised in that
Communication quality between above-mentioned terminal or the above-mentioned terminal of above-mentioned relay instrumentation and above-mentioned relay;
Above-mentioned calculation element, for the each positional information in multiple positional informations of above-mentioned terminal, calculates the communication path that above-mentioned communication quality exceedes setting;
Above-mentioned control device keeps each positional information in above-mentioned multiple positional information and the corresponding relation of said communication paths in advance, in the time communicating with above-mentioned terminal, obtain the specific positional information of above-mentioned terminal, from above-mentioned corresponding relation, the retrieval communication path corresponding with above-mentioned specific positional information, communicates via link terminal and above-mentioned terminal shown in the above-mentioned communication path retrieving.
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| PCT/JP2012/000447 WO2013111182A1 (en) | 2012-01-25 | 2012-01-25 | Wireless communication system, control apparatus, and wireless communication method |
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