CN105246137A - Micro-power wireless network data transmission method and system - Google Patents
Micro-power wireless network data transmission method and system Download PDFInfo
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- CN105246137A CN105246137A CN201510562682.XA CN201510562682A CN105246137A CN 105246137 A CN105246137 A CN 105246137A CN 201510562682 A CN201510562682 A CN 201510562682A CN 105246137 A CN105246137 A CN 105246137A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
- H04W52/0219—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave where the power saving management affects multiple terminals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a micro-power wireless network data transmission method and system. The method comprises the steps that a wakening frame transmitted by a master node or forwarded by a slave node of the previous routing level is received; whether the current routing level in the wakening frame is less than the total number of routing levels is judged, and all other slave nodes in a network are synchronously wakened according to the data in the wakening frame and the judgment result; a meter reading data frame transmitted by the master node or forwarded by the slave node of the previous routing level is received; addressing is judged according to the target slave node MAC address data in the meter reading data frame; and if the judgment result is yes, a response meter reading data frame is transmitted to the master node or the slave node of the previous routing level at the second designated moment according to the data in the meter reading data frame. According to the method, a gas meter does not need to be wakened in a timing way for networking, and the master node does not need to periodically transmit wireless network route maintenance data for network maintenance so that meter reading can be performed anytime without meter reading time window restriction.
Description
Technical field
The present invention relates to a kind of wireless network data transmission field.Relate in particular to a kind of micropower wireless meter reading method and adopt the method from node.
Background technology
Along with popularizing of the technology such as technology of Internet of things and large data analysis, and gas company is to the use destiny certificate of user and characteristic, the on-the-spot requirement of real-time with compression ring border, and a large amount of Automatic meter reading system arises at the historic moment.
At present, Automatic meter reading system is made up of main website of gas company service system, long-range GPRS communication micropower radio concentrator, local microenvironment power wireless collection device, local microenvironment power wireless repeater and local microenvironment power Wireless IC card gas meter, flow meter usually.
Gas meter, flow meter is responsible for measuring and pre-payment controls and wirelessly provided by destiny certificate and site environment information by micropower, also can be performed the forwarding of micropower wireless data; Repeater realize the forwarding of micropower wireless data, the distance of the Wireless Data Transmission that extended and gas meter, flow meter micro-power wireless communication can be solved time the transmitting power large and large problem that consumes energy; Collector achieves the combustion gas data acquisition of a micropower wireless network, the combustion gas data of multiple collector collection micropower wireless network separately, make that each micropower wireless network can not expand far distance, the quantity that whole system can be made can to gather gas meter, flow meter again increases; Concentrator manages micropower wireless collection devices all in a combustion gas data acquisition network be made up of multiple micropower wireless network, and online and main website of gas company service system realizes real-time information interaction by the real-time GPRS of public network.Described micropower wireless network refers to by a host node and multiple wireless communication networks formed from node, each equipment specifies a network ID, wherein, collector described above or the such collecting device of concentrator can be used as host node, and gas meter, flow meter and repeater can be used as from node.
The many employings of existing wireless meter reading method are based on the wireless network protocol of the MANETs such as zigbee, by host node with from the auto-negotiation multihop network between node, or by specified circuit by concentrator-collector/repeater/gas meter, flow meter-collector/repeater/multistage transmission means of gas meter, flow meter-gas meter, flow meter realize between concentrator and gas meter, flow meter transfer of data.The network-building method of prior art needs gas meter, flow meter timing wake-up, and for safeguarding up-to-date network configuration, need appointment to check meter time window, collecting device periodically sends data to determine the optimal path of each equipment in micropower wireless network.Such operation is proposed higher requirement to the accuracy of gas meter, flow meter clock and power consumption etc., needs a comparatively complicated process just can calculate and optimum turns originator, be unfavorable for that the power consumption of system and cost reduce between gas meter, flow meter.
Summary of the invention
For this reason, technical problem to be solved by this invention is to need in prior art periodically initiatively to wake up and collecting device needs are initiatively initiated path detection and caused the problem that system power dissipation is higher, cost is high.For this reason, the present invention proposes a kind of micropower wireless network data transmission method, and described micropower wireless network comprises a host node and multiple from node, and described method comprises:
Receive come autonomous node send or in a upper route rank from node forward wake frame up;
Whether the current route rank waken up described in judgement in frame is less than the total progression of route, and wherein said current route rank represents and receives the route rank from node place that this wakes frame data up;
When waking the current route rank in frame up and being less than the total progression of route, according to the data waken up in frame calculate from receive the moment of waking frame up play forward the first duration T1 in the moment of waking frame up and play all the second duration T2 waking the moment from synchronisation of nodes up from having forwarded the moment of waking frame up;
Make this from node from receive wake frame up moment wait for this first duration T1 after start forwarding and wake frame up, and then after this second duration T2 is waited in continuation, enter wake-up states.
Preferably, described data transmission method, also comprises:
When waking the current route rank in frame up and equaling the total progression of route, calculate according to the data waken up in frame and play all the 3rd duration T3 waking the moment from synchronisation of nodes up from receiving the moment of waking frame up;
Make this from node from receive wake frame up moment wait for and enter wake-up states after the 3rd duration T3.
Preferably, described data transmission method, also comprises after synchronisation of nodes wakes up all:
Receive that autonomous node sends or in a upper route rank the meter reading data frame forwarded from node;
Addressing oneself is judged whether from node MAC addr data according to the target in meter reading data frame;
When being addressing oneself, then according to the data in meter reading data frame specify the moment to host node or on send response meter reading data frame from node in a route rank;
When not being addressing oneself, then judge whether the current route rank in meter reading data frame is less than the judgement of target route rank, if be less than, the 4th duration T4 in the moment of meter reading data frame is forwarded then playing from the moment receiving meter reading data frame according to the data calculating in meter reading data frame, make this from node from receive wait for the 4th duration T4 meter reading data frame after start to forward meter reading data frame, described target route rank represents the route rank of transmission target from node place of described meter reading data frame.
Preferably, described data transmission method, according to the data in meter reading data frame specify the moment to host node or on the step sending response meter reading data frame from node in a route rank comprise:
Play the 5th duration T5 in described appointment moment from the moment receiving meter reading data frame according to the data calculating in meter reading data frame;
Make this wait for from receiving the moment of meter reading data frame from node and reply meter reading data frame to sending from node in host node or a upper route rank after the 5th duration T5.
The present invention also proposes a kind of micropower wireless network data transmission system, and described micropower wireless network comprises a host node and multiple described from node, comprising:
First receiving element, for receive autonomous node send or in a upper route rank from node forward wake frame up;
Whether the first judging unit, be less than the total progression of route for the current route rank waken up in frame described in judging, wherein said current route rank represents and receives the route rank from node place that this wakes frame data up;
First computing unit, for when waking the current route rank in frame up and being less than the total progression of route, according to the data waken up in frame calculate from receive the moment of waking frame up play forward the first duration T1 in the moment of waking frame up and play all the second duration T2 waking the moment from synchronisation of nodes up from having forwarded the moment of waking frame up;
First wakeup unit, for make this from node from receive wake frame up moment wait for this first duration T1 after start forwarding and wake frame up, and then after this second duration T2 is waited in continuation, enter wake-up states.
Preferably, described micropower wireless network data transmission system, also comprises:
Second computing unit, for when waking the current route rank in frame up and equaling the total progression of route, calculates according to the data waken up in frame and plays all the 3rd duration T3 waking the moment from synchronisation of nodes up from receiving the moment of waking frame up;
Second wakeup unit, for make this from node from receive wake frame up moment wait for and enter wake-up states after the 3rd duration T3.
Preferably, described micropower wireless network data transmission system, also comprises:
Second receiving element, for receiving that autonomous node sends or in a upper route rank the meter reading data frame forwarded from node;
Second judging unit, for judging whether addressing oneself according to the target in meter reading data frame from node MAC addr data;
First response unit, for when being addressing oneself, according to the data in meter reading data frame specify the moment to host node or on send response meter reading data frame from node in a route rank;
Second response unit, for when not being addressing oneself, judge whether the current route rank in meter reading data frame is less than the judgement of target route rank, if be less than, then need to forward described meter reading data frame, now, the 4th duration T4 in the moment of meter reading data frame is forwarded playing from the moment receiving meter reading data frame according to the data calculating in meter reading data frame, make this from node from receive wait for the 4th duration T4 meter reading data frame after start to forward meter reading data frame, described target route rank represents the route rank of transmission target from node place of described meter reading data frame.
Preferably, described micropower wireless network data transmission system, described first response unit comprises:
3rd computing unit, for playing the 5th duration T5 in described appointment moment from the moment receiving meter reading data frame according to the data calculating in meter reading data frame, should wait for from receiving the moment of meter reading data frame from node and reply meter reading data frame to sending from node in host node or a upper route rank after the 5th duration T5.
Technique scheme of the present invention has the following advantages compared to existing technology:
1, micropower wireless network data transmission method of the present invention micropower wireless network wherein comprises a host node and multiple from node, the method is waken frame up by host node (can be such as collector equipment (collector/concentrator)) transmission and is namely initiated to wake instruction up, this wakes frame up and forwards step by step in network, finally make all receive to wake frame up and then be unified in a time point collective from node (can be such as gas meter, flow meter or relay equipment) wake up, for the data reading system realizing the whole network is ready.The method carries out networking without the need to timing wake-up from node, radio network path service data maintaining network is sent without the need to host node cycle, only have when needs are checked meter, just sent by host node and wake instruction up, the method makes to check meter and can carry out in any time, there is no time window restriction of checking meter.
2, in the method applied in the present invention, by be divided into from node needs forward wake up frame from node and do not need to forward wake up frame from node, the waiting time different according to different situation accurate Calculation, thus accurately realize waking up, for the follow-up data reading system realizing the whole network carries out sufficient preparation putting collective at the same time.
3, in the method applied in the present invention, to be unified in after a time point collective wakes up from node all, again send meter reading data frame by host node and namely initiate meter reading instruction, the target that will the check meter MAC Address data from node are comprised in this meter reading data frame, addressing oneself is judged whether according to described MAC Address data from node, and then according to whether addressing oneself determines it is the response meter reading data frames to be sent such as continuation, forwards meter reading data frame or do not forward meter reading data frame.In the method applied in the present invention, initiated to wake up and meter reading instruction by host node (can be such as collector equipment (collector/concentrator)) unique in network, the functions waken up with data answering and data retransmission from node (can be such as gas meter, flow meter and relay equipment) realization acceptance all in Home Network.The method applied in the present invention carries out networking without the need to timing wake-up gas meter, flow meter, sends radio network path service data maintaining network without the need to host node cycle.Only have when needs are checked meter, just sent by host node and wake instruction up, all from node and then be unified in a time point collective and wake up, and can data retransmission be carried out, finally realize the data reading system of the whole network.Method of the present invention makes to check meter and can carry out in any time, there is no time window restriction of checking meter.
4, in the method applied in the present invention, addressing oneself is judged whether according to the target meter reading data frame from node MAC addr data from node, when being addressing oneself, then according to the data in meter reading data frame calculate the stand-by period make it possible to specify the moment to host node or on send response meter reading data frame from node in a route rank; When not being addressing oneself, judge whether further to need to forward, if need to forward, then the time to be forwarded according to the data calculating in meter reading data frame etc., thus realize the accurate control to the time, the data reading system of whole network is carried out in order efficiently.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the structural representation of a kind of micropower wireless network of the present invention;
Fig. 2 is the flow chart of the micropower wireless network data transmission method that one embodiment of the invention provides;
Fig. 3 is the partial process view of the micropower wireless network data transmission method that a preferred implementation of one embodiment of the invention provides;
Fig. 4 is the structured flowchart of the micropower wireless network data transmission system that another embodiment of the present invention provides;
Fig. 5 is the structured flowchart of the micropower wireless network data transmission system that a preferred implementation of another embodiment of the present invention provides;
Fig. 6 is the part-structure block diagram of the micropower wireless network data transmission system that another preferred implementation of another embodiment of the present invention provides;
Fig. 7 is the structured flowchart of the first response unit in another embodiment of the present invention.
Embodiment
Fig. 1 shows a kind of structural representation of micropower wireless network, as shown in Figure 1, this wireless network comprises a host node and multiple from node, wherein host node is responsible for sending initial data, from Node distribution in 1-3 level route, and every one-level route forming from node by multiple same level, particularly, the 1st grade of route in Fig. 1 includes 6 from node, and the 2nd grade of route includes 4 from node, and 3rd level route includes 4 from node.In order to realize transfer of data in micropower wireless network, the present embodiment provides a kind of micropower wireless network data transmission method, and see Fig. 2, described wireless network data transmission method comprises the steps:
S1: receive come autonomous node send or in a upper route rank from node forward wake frame up.First, at a micropower wireless network, such as, once checked meter by collection (collector/concentrator) device start in the micropower wireless network be made up of collector, concentrator, repeater and gas meter, flow meter, points of two stages of once checking meter realize, and are respectively awakening phase and check meter the stage.At first stage and awakening phase, because being respectively in resting state at ordinary times from node in network, cannot carry out the transmitting-receiving of data, collecting device needs transmission to wake frame (short data frame) up, make in network all from node at the appointed time unification wake up.
The form waking frame up can be as shown in table 1, at least comprises and wake frame transmission length remaining time, network identity, time delay grade, total timeslot number, current route rank and the total progression of route up.Wherein, described in wake up frame send remaining time length refer to originally wake up frame pitch from this wake up frame send terminate time span, its be current awake frame process of transmitting remaining time mark, described network identity shows the mark of work at present network, described total timeslot number refers to that same route level network (can be divided into from the total time space-number of node for data forwarding and wake frame up and forward total timeslot number and Frame forwards total timeslot number two values, these two numerical value are respectively by waking frame up and Frame carries, the two numerical value can be different, but give tacit consent to identical time host node sends), can exterior arrangement, for the wireless network architecture of Fig. 1, 6 are to the maximum from number of nodes due to every one-level route, so same route level network is 6 from the total time space-number of node for data forwarding, namely total timeslot number is 6, described total timeslot number carries when being sent waken up frame and Frame by host node, this content waken up frame and Frame can't be revised from node forwards time, described time delay grade refers to that same route level network is from node, only the moment of forwarding data frame is played from receiving the Frame moment, the timeslot number at interval between this, namely which time slot in total timeslot number, the total timeslot number of time delay grade <, if total timeslot number is 6, n0, n1, n2, n3, n4, n5 time interval number to be randomly assigned in same route level network by system that each obtains from node by time delay grade, the total progression of described route refers to total progression of data retransmission, and can extraneous configure, the total progression of the route in Fig. 1 is 3 grades, described current route rank refers to that expression receives the route rank from node place that this wakes frame or data frame data up, if such as receive this wake up frame from node be 2 grades of-0#, then described current route rank is 2 grades, during data retransmission, need that a process is added to the current route rank in the frame received and forward again.
Table 1 wakes a kind of instantiation of frame format up
S2: whether the current route rank waken up described in judgement in frame is less than the total progression of route, wherein said current route rank represents and receives the route rank from node place that this wakes frame data up, when waking the current route rank in frame up and being less than the total progression of route, enter step S3, when waking the current route rank in frame up and equaling the total progression of route, enter step S5.
S3: according to the data waken up in frame calculate from receive the moment of waking frame up play forward the first duration T1 in the moment of waking frame up and play all the second duration T2 waking the moment from synchronisation of nodes up from having forwarded the moment of waking frame up.When waking the current route rank in frame up and being less than the total progression of route, then need to wake frame up described in forwarding, that is, the total progression of route is less than when waking the current route rank in frame up, illustrate that data are not also sent to afterbody route, receive current data from node need again forwarding data to next stage route each from node, until data are sent to afterbody route.
S4: make this from node from receive wake frame up moment wait for this first duration T1 after start forwarding and wake frame up, and then after this second duration T2 is waited in continuation, enter wake-up states.
S5: when waking the current route rank in frame up and equaling the total progression of route, calculates according to the data waken up in frame and plays all the 3rd duration T3 waking the moment from synchronisation of nodes up from receiving the moment of waking frame up.
S6: make this from node from receive wake frame up moment wait for and enter wake-up states after the 3rd duration T3.
Below, first introduce the principle waken frame up and transmit in the wireless network, and then the computational process of above-mentioned duration T1, T2 made an explanation:
In order to evade collision on wireless link and interference, repeating process has been limited in carrying out in given time slot, thus ensures, in any one spatial dimension of any one time point, only have one to carry out data transmit operation from node.
For the wireless network in Fig. 1, for host node, waking up in frame data that it sends sets total timeslot number, suppose that total timeslot number is 6, so the 1st route level has 6 time slots, all data received can carry out copying forwarding in 6 time slots of the 1st route level, if 1-0# ~ 1-5# have received data from node 0 time slot simultaneously, so next in 1-6 time slot, can carry out data retransmission transmission successively.
For the 2nd grade of route, what in time slot 1-6, can receive that the 2nd grade of route forward from node 1-0# ~ 1-5# successively wakes frame up, if receive wake frame up equal from the route rank at node place the expection route rank that this wakes frame up, then can not again forward, otherwise, then forwarding operation is carried out.Because the 2nd grade of route knows that the forwarding time slot number of the 1st grade of route is 6, in order to conflict can not be produced with the 1st grade of route when ensureing to send, just start after the node that the forwarding of the 2nd grade of route must likely receive forwarding data the 1st grade of route completes its forwarding task, that is 1-6 time slot must be hidden, so first transmitted frame of the 2nd grade of route is from time slot 7, to 12, totally 6 forwarding time slots, carry out data transmission.
For 3rd level route, because 3rd level route is a minimum data route level, in time slot 7-12, the forwarding that the 2nd grade of route send from node 2-0# ~ 2-3# can be received successively wake frame up, if receive wake frame up equal from the route rank at node place the expection route rank that this wakes frame up, then can not again forward.If there is more route level, then the like.
If equal expection route rank from the current route rank of node, then represent that this frame arrives at the destination.Network from node receive destination be this node wake frame up after, according to the information waken frame up and carry, computing time is to be in full speed running state in the unified time.
According to the above-mentioned analysis waking frame repeating process principle up:
(1) certain from nodes X from receive wake frame up moment, to start to forward wake frame up moment only, the stand-by period length T1 in the middle of this comprises two parts:
First, other all node for data forwarding time span of upper level route level, this time span equals (total timeslot number-time delay grade-1) × often forward the time span of once waking frame data up+wake up frame send remaining time+each stage network data is detained the error compensation time, because need all nodes waiting for upper level route to forward wake frame end up, the node of this one-level route could send to the node of next stage route and wake frame up.For example, total timeslot number is 5, and that time delay grade may be some (remming to 5, is certainly be less than 5) in 0,1,2,3,4.Like this, data received when a certain node/wake total timeslot number in frame up are 5, time delay grade is 4, then represent it is the data that in the node of upper level, last time slot sends, and these data are received (because data send, and being received, so subtract 1), such 5-4-1 is zero, represents that the node of upper level sends data all.In addition, about being explained as follows " often forwarding the time span once waking frame data up ": receive continuing forwarding within a period of time from node and waking frame up of data, this time continuing to send is exactly often forward the time span once waking frame data up.Such as, it is 2 seconds that waking up nodes frame sends duration, but one is waken up frame 4 bytes and is sent completely only needs 1 millisecond, can send 2000 like this and wake frame up in 2 seconds.For another example, suppose that total timeslot number is 5, it is 2 seconds × 5=10 second that the node like this in this one-level route forwards the total time of waking frame up, has node to forward wake frame up at 0,2,4,6,8 second these time point.
Second, should from the time span of nodes X at this route rank forwarding data, this part time span equals time delay grade × often forward the time span once waking frame data up, because may several be had with the node of one-level route, data (wireless data of same frequency range can be caused like this to disturb) can not be sent by these nodes simultaneously.Which total so within the scope of timeslot number, send at times, be exactly the meaning of time slot within the scope of the total timeslot number of time delay grade, and produce at random according to each node.
Therefore, described first duration T1 is obtained according to following formula:
T1＝n
relay-inter×t
wakeup+(n
relay-inter-max-n
relay-inter-1)×t
wakeup+t
wakeup-left+t
makeup
Wherein, n
relay-inter-maxrepresent total timeslot number, i.e. all total time space-numbers from node for data forwarding of same route level network; n
relay-interrepresent time delay grade, namely same route level network only plays the moment of forwarding data frame, the timeslot number at interval between this from node from receiving the Frame moment, which time slot namely in total timeslot number, n
relay-inter< n
relay-inter-max; t
wakeuprepresent that waking frame up sends duration, namely this sends the time span waking frame up; t
wakeup-leftrepresent that waking frame up sends remaining time, namely originally wake frame pitch up and wake from this time that frame sends end up; t
makeuprepresent that a route level network data is detained the error compensation time.
(2) certain from nodes X from forwarded wake frame up moment, to entering the moment of wake-up states only, the stand-by period length T2 in the middle of this comprises two parts:
First, residue route rank data retransmission time span, this part time span equals (the total progression of route-current route rank-1) × (total timeslot number × often forwarding time span+each stage network data once waking frame data up is detained the error compensation time).Suppose that node receives to wake " current route rank " in frame up be 2, " the total progression of route " is 6, then also has the route of 3,4,5,6 grades below, other node of these route levels all needs forwarding data (naturally every one-level all needs spended time), and the current data that just receive of self 2 grades of other node of route level, and do not start to forward, self 2 grades of other node of route level also needs spended time to forward like this.Wherein, the time of 3,4,5 grades of required costs of route rank forwarding data is called residue rank data forwarding time;
Second, should from the time span of nodes X at this route rank forwarding data, this part time span equals (total timeslot number-time delay grade-1) × and often forwarding time span+each stage network data once waking frame data up is detained the error compensation time.
Therefore, described second duration T2 is obtained according to following formula:
T2＝(r
exp-r
curr-1)×(n
relay-inter-max×t
wakeup+t
makeup)+(n
relay-inter-max-n
relay-inter-1)×t
wakeup+t
wakeup-left+t
makeup
Wherein, r
exprepresent the total progression of route, i.e. total progression of data retransmission; r
currrepresent current route rank, namely receive the route rank from node place that this wakes frame data up; n
relay-inter-maxrepresent total timeslot number, i.e. all total time space-numbers from node for data forwarding of same route level network; n
relay-interrepresent time delay grade, namely same route level network only plays the moment of forwarding data frame, the timeslot number at interval between this from node from receiving the Frame moment, which time slot namely in total timeslot number, n
relay-inter< n
relay-inter-max; t
wakeuprepresent that waking frame up sends duration, namely this sends the time span waking frame up; t
wakeup-leftrepresent that waking frame up sends length remaining time, namely originally wake frame pitch up and wake from this time span that frame sends end up; t
makeuprepresent that a route level network data is detained the error compensation time.
See Fig. 2, in step S5, the total progression of route is equaled when waking the current route rank in frame up, illustrate that at this time waking frame data up has passed to afterbody route network, without the need to again toward next stage routing forwarding data, so only need to wait for that other all node for data forwarding of a upper route level terminates, the difference forwarded with the meter reading data frame mentioned below is here exactly wake frame up to send length t remaining time
wakeup-left, because it is longer to wake frame transmission duration up, additionally individual remaining time need be had.Specifically, each node is low power consuming devices, node was in resting state before being waken up, node under resting state can wake up 20 milliseconds in interval such as 5 seconds, only data could be received in these 20 milliseconds of interior nodes, so like this, the transmission duration waking frame up will reach 5.02 seconds, just can be received by node.And the meter reading data frame mentioned below does not just have this situation, because when sending Frame, node is waken up all, and any moment can receive data.
According to above-mentioned principle, when not needing forwarding to wake frame data up, should from nodes X from receive wake frame up moment, to entering the moment of wake-up states only, the stand-by period T3 in the middle of this was made up of two parts time:
First, upper level route rank all node data transmitting times length, this part time span equals (total timeslot number-time delay grade-1) × and often forwarding time span+each stage network data once waking frame data up is detained the error compensation time, because need all nodes waiting for upper level route to forward wake frame end up, the node of this one-level route could send to the node of next stage route and wake frame up.
The second, wake frame up and send length remaining time, namely originally wake frame pitch up and wake from this time span that frame sends end up.
Therefore, described 3rd duration T3 is obtained according to following formula:
T3＝(n
relay-inter-max-n
relay-inter-1)×t
wakeup+t
makeup+t
wakeup-left；
Wherein, n
relay-inter-maxrepresent total timeslot number, i.e. all total time space-numbers from node for data forwarding of same route level network; n
relay-interrepresent time delay grade, namely same route level network only plays the moment of forwarding data frame, the timeslot number at interval between this from node from receiving the Frame moment, which time slot namely in total timeslot number, n
relay-inter< n
relay-inter-max; t
wakeuprepresent that waking frame up sends duration, namely this sends the time span waking frame up; t
wakeup-leftrepresent that waking frame up sends length remaining time, namely originally wake frame pitch up and wake from this time span that frame sends end up; t
makeuprepresent that a route level network data is detained the error compensation time.The micropower wireless network data transmission method that the present embodiment adopts, micropower wireless network wherein comprises a host node and multiple from node, the method is waken frame up by host node (can be such as collector equipment (collector/concentrator)) transmission and is namely initiated to wake instruction up, this wakes frame up and forwards step by step in network, finally make all receive to wake frame up and then be unified in a time point collective from node (can be such as gas meter, flow meter and relay equipment) wake up, for the data reading system realizing the whole network is ready.The method carries out networking without the need to timing wake-up from node, sends radio network path service data maintaining network without the need to host node cycle, only has when needs are checked meter, and is just sent by host node and wakes instruction up.Checking meter in the present embodiment can be carried out in any time, there is no time window restriction of checking meter, carry out networking without the need to timing wake-up gas meter, flow meter, periodically send radio network path service data maintaining network without the need to collecting device, therefore, the power consumption of system and cost all greatly reduce.
In the method applied in the present invention, by be divided into from node needs forward wake up frame from node and do not need to forward wake up frame from node, the waiting time different according to different situation accurate Calculation, thus accurately realize waking up, for the follow-up data reading system realizing the whole network carries out sufficient preparation putting collective at the same time.
As a kind of preferred implementation, see Fig. 3, also comprise after synchronisation of nodes wakes up all:
S7: receive that autonomous node sends or in a upper route rank the meter reading data frame forwarded from node.Because each node is in wake-up states all in network, host node such as collecting device sends meter reading data frame one by one according to the nodal information (MAC Address etc.) of configuration and checks meter; After network receives meter reading data frame from node, addressing oneself is judged whether according to mac address information, the process needing to carry out data retransmission will be judged whether if not addressing oneself, therefore, as from node, the meter reading data frame that it receives be likely host node send, also may be in a upper route rank from node forwarding, also may be same one-level route level not in forward from node.As shown in table 2ly in meter reading data frame at least comprise time delay grade and these information of route rank.Also comprise some other information such as agreement or transfer of data encryption of checking meter such as encapsulated in meter reading data frame, do not launch to repeat at this.
A kind of instantiation of table 2 meter reading data frame format
S8: judge whether addressing oneself from node MAC addr data according to the target in meter reading data frame; When being addressing oneself, then enter step S81; When not being addressing oneself, then enter step S82.Describedly judge whether that addressing oneself is compared from node MAC addr and the MAC Address of oneself target described meter reading data frame according to the target in meter reading data frame from node MAC addr data, if consistent, think addressing oneself, if inconsistent, not think it is addressing oneself.
S81: according to the data in meter reading data frame specify the moment to host node or on send response meter reading data frame from node in a route rank.This step S81 comprises further:
S811: the 5th duration T5 playing the described appointment moment according to the data calculating in meter reading data frame from the moment receiving meter reading data frame.
S812: make this wait for from receiving the moment of meter reading data frame from node and reply meter reading data frame to sending from node in host node or a upper route rank after the 5th duration T5.That is, response meter reading data frame will wait until that meter reading data frame terminates to send at whole wireless network repeating, therefore, certain from nodes X from receiving the moment of meter reading data frame, to to only sending the moment of response meter reading data frame from node in host node or a upper route rank, the stand-by period length T5 in the middle of this comprises two parts:
First, the residue route rank data retransmission time, this part time equals (the total progression of route-current route rank-1) × and (time span+each stage network data that total timeslot number × often forwards a meter reading data frame is detained the error compensation time), the described time span often forwarding a meter reading data frame is such as 500 milliseconds;
Second, self route rank data retransmission time, this part time equals (total timeslot number-time delay grade-1) × and the time span+each stage network data that often forwards a meter reading data frame is detained the error compensation time, because in same primary network station, (not being addressing self) each node all needs to forward; But can not forward at synchronization.Such as total timeslot number is 5, represents that these nodes can forward respectively in 5 timeslices, such as 0,1,2,3,4 moment.A node, after 2 moment forwarding datas, also needs to wait for that (5-2 – 1) is after the individual time, and these data just forward and terminate in this primary network station.
Therefore, described 5th duration T5 is obtained according to following formula:
T5＝(r
exp-r
curr-1)×(n
relay-inter-max×t
relay-inter+t
makeup)+(n
relay-inter-max-n
relay-inter-1)×t
relay-inter+t
makeup
Wherein, r
exprepresent the total progression of route, i.e. total progression of data retransmission; r
currrepresent current route rank, namely represent the route rank from node place receiving this data frame data; n
relay-inter-maxrepresent total timeslot number, i.e. all total time space-numbers from node for data forwarding of same route level network; n
relay-interrepresent and postpone grade, namely same route level network only plays the moment of forwarding data frame, the timeslot number at interval between this from node from receiving the Frame moment, which time slot namely in total timeslot number, and this value is less than total timeslot number; t
relay-interrepresent the time span often forwarding a meter reading data frame, t
makeuprepresent that a route level network data is detained the error compensation time.
S82: judge whether the current route rank in meter reading data frame is less than target route rank, described target route rank represents the route rank of transmission target from node place of described meter reading data frame.If the current route rank in meter reading data frame equals target route rank, then do not need to forward described meter reading data frame; If the current route rank in meter reading data frame is less than target route rank, then need to forward described meter reading data frame to next stage route from node.
When needs forward meter reading data frame, according to the data in meter reading data frame calculate play from the moment receiving meter reading data frame forward the 4th duration T4 in the moment of meter reading data frame, should from node from receive wait for the 4th duration T4 meter reading data frame after start to forward meter reading data frame.Therefore, certain is from nodes X from receiving the moment of meter reading data frame, and stop to the moment starting to forward meter reading data frame, the stand-by period T4 in the middle of this was made up of two parts time:
The first, a upper route rank is from node for data forwarding time span.A upper route level else allly all wants forwarding data from node, and each exist an interval time from node for data forwarding, and other allly terminates from node for data forwarding to wait until upper level route level, and self this one-level route level special talent can start forwarding data.Suppose that total timeslot number is 5, then the time delay grade of Frame that this node receives is likely a value in 0,1,2,3,4 (namely altogether 5 moment, the data received may be the data sent in 0,1,2,3,4 moment).In such wait, other all node of a route level has forwarded, and the time of wait calculates according to (total timeslot number-time delay grade-1) in Frame.That is, this part-time equals time span+each stage network data delay error compensation time of (total timeslot number-time delay grade-1) × forwarding meter reading data frame;
The second, from the time span in this route rank forwarding data.Self this one-level route level other all from node by certain forwarding data interval time, n
relay-interrepresent and postpone grade, be each random value produced from node, therefore the time of self forwarding data is the time span of time delay grade × forwarding meter reading data frame.
Therefore, described 4th duration T4 is obtained according to following formula:
T4＝(n
relay-inter-max-n
relay-inter-1)×t
relay-inter+t
makeup+n
relay-inter×t
relay-inter
Wherein, n
relay-inter-maxrepresent total timeslot number, i.e. all total time space-numbers from node for data forwarding of same route level network; n
relay-interrepresent and postpone grade, namely same route level network only plays the moment of forwarding data frame from node from receiving the Frame moment, the timeslot number at interval between this, namely which time slot in total timeslot number, postpone grade to produce according to equipment firmware beat number when receiving wireless data, during forwarding, Update Table frame time delay grade is this value, and this value is less than total timeslot number; t
relay-interrepresent the time span often forwarding a meter reading data frame, i.e. the time span of same route rank target node Frame; t
makeuprepresent that a route level network data is detained the error compensation time.
In the method that present embodiment adopts, to be unified in after a time point collective wakes up from node all, again send meter reading data frame by host node and namely initiate meter reading instruction, the target that will the check meter MAC Address data from node are comprised in this meter reading data frame, addressing oneself is judged whether according to described MAC Address data from node, and then according to whether addressing oneself determines it is the response meter reading data frames to be sent such as continuation, forwards meter reading data frame or do not forward meter reading data frame.In the method that present embodiment adopts, initiated to wake up and meter reading instruction by host node (can be such as collector equipment (collector/concentrator)) unique in network, the functions waken up with data answering and data retransmission from node (can be such as gas meter, flow meter and relay equipment) realization acceptance all in Home Network.The method that present embodiment adopts carries out networking without the need to timing wake-up gas meter, flow meter, sends radio network path service data maintaining network without the need to host node cycle.Only have when needs are checked meter, just sent by host node and wake instruction up, all from node and then be unified in a time point collective and wake up, and can data retransmission be carried out, finally realize the data reading system of the whole network.Method of the present invention makes to check meter and can carry out in any time, there is no time window restriction of checking meter.
In the method that present embodiment adopts, addressing oneself is judged whether according to the target meter reading data frame from node MAC addr data from node, when being addressing oneself, then according to the data in meter reading data frame calculate the stand-by period make it possible to specify the moment to host node or on send response meter reading data frame from node in a route rank; When not being addressing oneself, judge whether further to need to forward, if need to forward, then the time to be forwarded according to the data calculating in meter reading data frame etc., thus realize the accurate control to the time, the data reading system of whole network is carried out in order efficiently.
As another embodiment, please refer to Fig. 4, the present embodiment provides a kind of micropower wireless network data transmission system, and described micropower wireless network comprises a host node and multiple described from node, comprising:
First receiving element (1), for receive autonomous node send or in a upper route rank from node forward wake frame up;
Whether the first judging unit (2), be less than the total progression of route for the current route rank waken up in frame described in judging, wherein said current route rank represents and receives the route rank from node place that this wakes frame data up;
First computing unit (3), for when waking the current route rank in frame up and being less than the total progression of route, according to the data waken up in frame calculate from receive the moment of waking frame up play forward the first duration T1 in the moment of waking frame up and play all the second duration T2 waking the moment from synchronisation of nodes up from having forwarded the moment of waking frame up;
First wakeup unit (4), for make this from node from receive wake frame up moment wait for this first duration T1 after start forwarding and wake frame up, and then after this second duration T2 is waited in continuation, enter wake-up states.
As a preferred implementation, see Fig. 5, described micropower wireless network data transmission system also comprises:
Second computing unit (5), for when waking the current route rank in frame up and equaling the total progression of route, calculates according to the data waken up in frame and plays all the 3rd duration T3 waking the moment from synchronisation of nodes up from receiving the moment of waking frame up;
Second wakeup unit (6), for make this from node from receive wake frame up moment wait for and enter wake-up states after the 3rd duration T3.
As another preferred implementation, see Fig. 6, described micropower wireless network data transmission system also comprises:
Second receiving element (7), for receiving that autonomous node sends or in a upper route rank the meter reading data frame forwarded from node;
Second judging unit (8), for judging whether addressing oneself according to the target in meter reading data frame from node MAC addr data;
First response unit (81), for when being addressing oneself, according to the data in meter reading data frame specify the moment to host node or on send response meter reading data frame from node in a route rank;
Second response unit (82), for when not being addressing oneself, judge whether the current route rank in meter reading data frame is less than the judgement of target route rank, if be less than, then need to forward described meter reading data frame, now, according to the data in meter reading data frame calculate play from the moment receiving meter reading data frame forward the 4th duration T4 in the moment of meter reading data frame, make to start to forward meter reading data frame after wait the 4th duration T4 from receiving meter reading data frame from node; If equaled, then do not need to forward described meter reading data frame, described target route rank represents the route rank of transmission target from node place of described meter reading data frame.
Preferably, see Fig. 7, described first response unit (81) comprises further:
3rd computing unit (811), for playing the 5th duration T5 in described appointment moment from the moment receiving meter reading data frame according to the data calculating in meter reading data frame;
First response subelement (812), to wait for from node for making this and replys meter reading data frame to sending from node in host node or a upper route rank after the 5th duration T5 from receiving the moment of meter reading data frame.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.And thus the apparent change of extending out or variation be still among the protection range of the invention.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Claims (8)
1. a micropower wireless network data transmission method, described micropower wireless network comprises a host node and multiple from node, and it is characterized in that, described method comprises:
Receive come autonomous node send or in a upper route rank from node forward wake frame up;
Whether the current route rank waken up described in judgement in frame is less than the total progression of route, and wherein said current route rank represents and receives the route rank from node place that this wakes frame data up;
When waking the current route rank in frame up and being less than the total progression of route, according to the data waken up in frame calculate from receive the moment of waking frame up play forward the first duration T1 in the moment of waking frame up and play all the second duration T2 waking the moment from synchronisation of nodes up from having forwarded the moment of waking frame up;
Make this from node from receive wake frame up moment wait for this first duration T1 after start forwarding and wake frame up, and then after this second duration T2 is waited in continuation, enter wake-up states.
2. data transmission method according to claim 1, is characterized in that, also comprises:
When waking the current route rank in frame up and equaling the total progression of route, calculate according to the data waken up in frame and play all the 3rd duration T3 waking the moment from synchronisation of nodes up from receiving the moment of waking frame up;
Make this from node from receive wake frame up moment wait for and enter wake-up states after the 3rd duration T3.
3. data transmission method according to claim 1 and 2, is characterized in that, also comprises after synchronisation of nodes wakes up all:
Receive that autonomous node sends or in a upper route rank the meter reading data frame forwarded from node;
Addressing oneself is judged whether from node MAC addr data according to the target in meter reading data frame;
When being addressing oneself, then according to the data in meter reading data frame specify the moment to host node or on send response meter reading data frame from node in a route rank;
When not being addressing oneself, then judge whether the current route rank in meter reading data frame is less than the judgement of target route rank, if be less than, the 4th duration T4 in the moment of meter reading data frame is forwarded then playing from the moment receiving meter reading data frame according to the data calculating in meter reading data frame, make this from node from receive wait for the 4th duration T4 meter reading data frame after start to forward meter reading data frame, described target route rank represents the route rank of transmission target from node place of described meter reading data frame.
4. data transmission method according to claim 3, is characterized in that, according to the data in meter reading data frame specify the moment to host node or on the step sending response meter reading data frame from node in a route rank comprise:
Play the 5th duration T5 in described appointment moment from the moment receiving meter reading data frame according to the data calculating in meter reading data frame;
Make this wait for from receiving the moment of meter reading data frame from node and reply meter reading data frame to sending from node in host node or a upper route rank after the 5th duration T5.
5. a micropower wireless network data transmission system, described micropower wireless network comprises a host node and multiple described from node, it is characterized in that, comprising:
First receiving element, for receive autonomous node send or in a upper route rank from node forward wake frame up;
Whether the first judging unit, be less than the total progression of route for the current route rank waken up in frame described in judging, wherein said current route rank represents and receives the route rank from node place that this wakes frame data up;
First computing unit, for when waking the current route rank in frame up and being less than the total progression of route, according to the data waken up in frame calculate from receive the moment of waking frame up play forward the first duration T1 in the moment of waking frame up and play all the second duration T2 waking the moment from synchronisation of nodes up from having forwarded the moment of waking frame up;
First wakeup unit, for make this from node from receive wake frame up moment wait for this first duration T1 after start forwarding and wake frame up, and then after this second duration T2 is waited in continuation, enter wake-up states.
6. micropower wireless network data transmission system according to claim 5, is characterized in that, also comprise:
Second computing unit, for when waking the current route rank in frame up and equaling the total progression of route, calculates according to the data waken up in frame and plays all the 3rd duration T3 waking the moment from synchronisation of nodes up from receiving the moment of waking frame up;
Second wakeup unit, for make this from node from receive wake frame up moment wait for and enter wake-up states after the 3rd duration T3.
7. the micropower wireless network data transmission system according to claim 5 or 6, is characterized in that, also comprise:
Second receiving element, for receiving that autonomous node sends or in a upper route rank the meter reading data frame forwarded from node;
Second judging unit, for judging whether addressing oneself according to the target in meter reading data frame from node MAC addr data;
First response unit, for when being addressing oneself, according to the data in meter reading data frame specify the moment to host node or on send response meter reading data frame from node in a route rank;
Second response unit, for when not being addressing oneself, judge whether the current route rank in meter reading data frame is less than the judgement of target route rank, if be less than, then need to forward described meter reading data frame, now, the 4th duration T4 in the moment of meter reading data frame is forwarded playing from the moment receiving meter reading data frame according to the data calculating in meter reading data frame, make this from node from receive wait for the 4th duration T4 meter reading data frame after start to forward meter reading data frame, described target route rank represents the route rank of transmission target from node place of described meter reading data frame.
8. micropower wireless network data transmission system according to claim 7, is characterized in that, described first response unit comprises:
3rd computing unit, for playing the 5th duration T5 in described appointment moment from the moment receiving meter reading data frame according to the data calculating in meter reading data frame, should wait for from receiving the moment of meter reading data frame from node and reply meter reading data frame to sending from node in host node or a upper route rank after the 5th duration T5.
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