CN101833802B - Large real-time wireless networking door control system powered by dry battery - Google Patents
Large real-time wireless networking door control system powered by dry battery Download PDFInfo
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- CN101833802B CN101833802B CN201010140181XA CN201010140181A CN101833802B CN 101833802 B CN101833802 B CN 101833802B CN 201010140181X A CN201010140181X A CN 201010140181XA CN 201010140181 A CN201010140181 A CN 201010140181A CN 101833802 B CN101833802 B CN 101833802B
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Abstract
The invention relates to a large real-time wireless networking door control system powered by a dry battery. The present door control system has complicated wiring and large power consumption. The large real-time wireless networking door control system powered by a dry battery comprises a door control management server, a PC client, an LAN (Local Area Network), a master controller, a wireless expansion module and a wireless door control lock, wherein the door control management server, the PC client and the master controller are in signal connection with the LAN, the master controller is in signal connection with the wireless expansion module, and the wireless expansion module is in signal connection with the wireless door control lock. The master controller and the wireless expansion module adopt RS485 communication connection and the wireless expansion module and the wireless door control lock which are in signal connection adopt a control protocol for communication connection. The wireless door control system is driven by the dry battery and no wiring is needed during the installation of the wireless door control management, thereby getting rid of defects that a wired power supply on the door lock reduces the aesthetic measure of the door and the service life is lowered for frequent bending of a power line in the prior art.
Description
Technical field
The invention belongs to the wireless network communication technique field, relate to a kind of large real-time wireless networking door control system of dry cell power supply.
Background technology
Wireless entrance guard is more saved time and the labour in construction and installation, can effectively improve the progress and the efficient of project construction, so wireless entrance guard is having very big advantage aspect the engineering construction wiring.But the ratio that the wireless entrance guard system accounts on market in the prior art is not high, and tracing it to its cause is that wireless entrance guard exists very big technical bottleneck.If adopt the power supply of cable power door lock, just need the wiring of trouble, since connected up, so-called " wireless " just lost meaning.Under little power consumption, realize very difficulty of real-time Data Transmission and adopt dry cell to drive, will avoid wireless electromagnetic on the one hand and disturb, on the other hand again and keep very frequent communication between the administrative center.The network-type wireless entrance guard product that on market, occurs roughly can be divided into two types: the wireless entrance guard system that the long distance wireless gate control system of employing GPRS or SMS communication is communicated by letter with the cable power powered, wireless.These two kinds of products can use dry cell to drive, but system power dissipation is bigger, the battery weak point of holding time.
Summary of the invention
The present invention is directed to the deficiency of prior art, a kind of large real-time wireless networking door control system of dry cell power supply is provided.
The hardware components of wireless networking door control system of the present invention comprises entrance guard management server, pc client, LAN, primary controller, wireless extensions module and wireless entrance guard lock;
Entrance guard management server, pc client and primary controller are connected with local area network signal, and primary controller is connected with the wireless extensions module by signal, and the wireless extensions module is connected with the wireless entrance guard lock signal;
Described entrance guard management server, pc client and primary controller are connected the existing local area network communication mode that adopts with local area network signal;
Described primary controller and wireless extensions module adopt the RS485 agreement to communicate;
Described wireless extensions module is connected with the wireless entrance guard lock signal, adopts control protocol to communicate between wireless entrance guard lock and the wireless extensions module;
The method of described control protocol comprises following concrete steps:
Step (1) wireless entrance guard lock judges that wireless chaining status whether for setting up state, if the state of setting up jumps to step (2), jumps to step (3) if not the state of foundation; The described state of setting up is wireless entrance guard lock and wireless host computer proper communication; Described wireless host computer is wireless extensions module or primary controller;
Step (2) wireless entrance guard lock judges and has or not data to be sent, if having then skip to step (4), otherwise skips to step (3); Described data to be sent comprise brushing card data, door lock action data, battery electric quantity, reply the data of wireless host computer.
Step (3) wireless entrance guard lock sends empty bag, and transmission skips to step (5) after accomplishing; Described empty bag data structure is made up of 8 lead codes, 32 bit address sign indicating numbers and 8 CRC check sign indicating numbers.
Step (4) wireless entrance guard lock sends wireless data packet, and transmission skips to step (5) after accomplishing; Described wireless data packet is made up of 8 lead codes, 32 bit address sign indicating numbers, N bit data content and 8 CRC check sign indicating numbers, wherein 0＜N≤256.
Step (5) wireless entrance guard lock changes accepting state, wireless host computer execution in step (6) over to;
Step (6) is wireless host computer is judged has the data that need not issue, if having then issue wireless data packet, if do not have then issue with the sky bag.Wireless host computer is in listen mode always; In case receive the correct data bag that the wireless entrance guard lock sends; Then wireless host computer must send wireless data packet or empty packet start in the time of appointment, and it is few more that this time shorter then wireless entrance guard interlocking is received institute's power consumption stream.Described correct data bag is that the address of wireless entrance guard lock transmission is identical with the address of reception, and CRC is correct;
Step (7) wireless entrance guard is locked judgement and is received reply data not, and whether detect the transmission packet successful.Described transmission packet is successfully received response packet for the wireless entrance guard interlocking, and described response packet is that the address of wireless entrance guard lock transmission is identical with the address of reception, and CRC is correct.Wireless entrance guard has changed accepting state at once over to after being locked in and sending end; The wireless entrance guard lock requires in the time of appointment, to receive packet or the empty bag that wireless host computer issues; The time span of this appointment is 10 microseconds～1000 microseconds; If in this time, do not receive any data, then be regarded as this and send failure.Send failure if detect, then skip to step (8).Otherwise getting into the dormancy waiting status then skips to step (1) and wireless host computer up to the time and shakes hands or send data.
Step (8) wireless entrance guard lock detects inferior the counting to not of repeating transmission of appointment, if the repeating transmission number of times of appointment arrives, and execution in step (9), otherwise also need retransmit, skip to step (12);
Whether step (9) wireless entrance guard lock judges the current wireless link for setting up state, if for setting up state, then under normal mode, the wireless entrance guard lock was shaken hands once with wireless host computer at interval in one second; Under quick mode, the wireless entrance guard lock is shaken hands once for 100 milliseconds with wireless host computer interval.Described normal mode is that wireless entrance guard lock and wireless host computer all do not have packet to be sent; Described quick mode is that wireless entrance guard lock or host computer have the packet that needs transmission; Radio Link successfully is set for setting up state if communicate by letter, skips to step (1), otherwise execution in step (10);
Whether step (10) wireless entrance guard lock judges the current wireless link for returning to form, and described returning to form to communicating by letter last time to setting up state retransmitted the back failure through 3 times.If for returning to form; Then increase the transmission number of times of setting; The communication frequency of selected again wireless entrance guard lock and wireless host computer from frequency meter; Again the position of communication frequency in frequency meter after selected is the next one of this communication frequency position in frequency meter, if this communication frequency is then selected the frequency of first position in the frequency meter in last position of frequency meter; In the communication frequency process of selected wireless entrance guard lock again and wireless host computer, wireless host computer communication frequency resets the required time and resets the required time more than or equal to the wireless entrance guard lock, sends packet then; Radio Link successfully is set for setting up state if communicate by letter, skips to step (1), otherwise execution in step (11); Described frequency meter is one group of frequency of operation that wireless entrance guard lock and wireless host computer are arranged in advance, has adopted 12 frequencies in the 2.4G frequency range in the present invention.
Step (11) wireless entrance guard lock judges whether the current wireless link is lost condition, and described lost condition is communication after returning to form still failure.If be lost condition, the transmission number of times of then setting is 1, presses the frequency meter medium frequency and selectes successively and send sky and wrap from little big order, and the host computer communication frequency remains unchanged in this process.Lose the frequency that the back both that writes to each other needs frequency hopping to avoid being disturbed at wireless entrance guard lock and host computer; Radio Link successfully is set for setting up state if communicate by letter, skips to step (1).
Step (12) wireless entrance guard lock judges whether arrive, if arrive at interval, then skip to step (1), otherwise get into the dormancy waiting status if retransmitting the time interval, then skip to step (1) up to the time;
The inventive method has the following advantages with respect to prior art:
The wireless entrance guard lock adopts dry cell to drive among the present invention; The installation of wireless entrance guard lock need not wiring; Broken away from reduction and the power lead low defective in serviceable life that causes of bending continually of the aesthetic measure of the opposite house that the cable power on the door lock causes in the prior art; Not only bring convenience, and improved the aesthetics of door, the serviceable life of also having improved whole gate inhibition system to installation.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the hardware configuration synoptic diagram of wireless entrance guard lock;
Fig. 3 is a wireless entrance guard lock control protocol method process flow diagram;
Fig. 4 locks the retransmission interval synoptic diagram for different unlimited gate inhibitions;
Fig. 5 is wireless entrance guard lock wireless communication state transition diagram;
Fig. 6 wireless entrance guard lock and wireless host computer frequency hopping synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further.
As shown in Figure 1, the large-scale wireless networking door control system of dry cell power supply comprises entrance guard management server 1, pc client 2, LAN 4, primary controller 10, wireless extensions module 20 and wireless entrance guard lock 30.
Entrance guard management server 1, pc client 2 and primary controller 10 are connected with LAN 4 signals; Primary controller 10 is wired connection or wireless connections with LAN 4 signal ways of connecting; Primary controller 10 is connected with wireless extensions module 30 signals, and wireless extensions module 20 is locked 30 signals with wireless entrance guard and is connected.
The entrance guard management server is responsible for the parameter setting to primary controller, wireless extensions module, wireless entrance guard lock, and functions such as hair fastener, the record of swiping the card, doors condition managing, attendance data, user authority management.Pc client is any computer in the LAN.The entrance guard management server software adopts the B/S structure, and pc client is through IE browser access entrance guard management server.
Primary controller inserts the mode of local and supports 2 kinds: wifi is wireless or cable network.The entrance guard management server will be relevant with this primary controller some doors management datas download to primary controller, when the entrance guard management server closing, primary controller can be managed each wireless extensions module and wireless entrance guard lock independently.Primary controller will collect each gate inhibition and put data such as switch door state, card using information and send to the entrance guard management server through LAN.
Primary controller is connected through the RS485 bus with the wireless extensions module, and primary controller obtains gate inhibition's data that the wireless extensions module collects through polling mode.Each primary controller has two RS485 interfaces, and each RS485 mouth can connect 32 wireless extensions modules.
Primary controller also can directly be communicated by letter with the wireless entrance guard lock in the scope that transmission range allows.
The wireless extensions module plays the effect of an extended distance, and primary controller is communicated by letter through wired RS485 with the wireless extensions module, and the wireless extensions module is communicated by letter through wireless mode with the wireless entrance guard lock.In the practice of construction process with RS485 order wire cloth above the passageway; The wireless extensions module is placed in place at the tight lock signal undercapacity of wireless door; Through being distributed in the wireless extensions module of each floor, each doors is formed a large-scale wireless entrance guard network.
The hardware that the wireless entrance guard lock adopts the long-time power supply of dry cell at first will satisfy the wireless entrance guard lock realizes it being little power consumption.As shown in Figure 2, this wireless entrance guard lock comprises infrared reception transmitter unit 32, wireless transmit receiving element 33, motor control unit 34, card read head for ID unit 35, microprocessor 31, storage unit 36 and power supply 37.Power supply 37 provides the driving power of all elements in this wireless entrance guard lock.Infrared reception transmitter unit whenever wakes infrared light of emission at a distance from 250 milliseconds up by CPU, if block the receiving circuit output low level, CPU can detect through this signal and have or not card swiping the card.The data that card is responsible in the card read head for ID unit read and write.Storage unit is used for storage running parameter and the off line record of swiping the card.This microprocessor carries out radio communication through wireless transmit receiving element and host computer, and carries out each item order that host computer issues.Motor control unit is responsible for the opening and closing of door lock.
The wireless entrance guard lock overwhelming majority time is under the standby mode, as long as standby mode can be realized low-power consumption, just can realize that low-power consumption provides guarantee to the wireless entrance guard lock.The power consumption that wireless entrance guard is locked under the standby mode mainly is divided into 2 parts: the card of 250 milliseconds of infrared reception transmitter units once detects and 1 second radio communication once.The infrared emission pulsewidth is 50 microseconds in the present embodiment, and transmitter current is 50 milliamperes, and the receiving circuit electric current is 0.5 milliampere, transmits and receives simultaneously to carry out, and the infrared operation number of times in 1 year of card detection is T:
T=4 * 3600 * 24 * 365=126144000 time
The power consumption E in 1 year is:
E＝(50+0.5)×50×10
-6/3600×T＝88.476maH
The time of a packet of the wireless entrance guard lock related reception of transmission is very short in the present embodiment; Pressing communication baud rate 1Mbps calculates; 13 milliamperes of transmitter currents; Whether 18 milliamperes of received currents need empty bag inquiry host computer to have data download to get final product because wireless entrance guard is locked in following of standby mode, therefore:
The length of up inquiry packet: L1=8 position lead code+CRC check sign indicating number=48,32 bit address sign indicating number+8.
The length of descending response packet: L2=8 position lead code+CRC check sign indicating number=56, response message sign indicating number+8,32 bit address sign indicating number+8.
The elapsed time of up inquiry packet is: T1=transmitter trigger time 202us+ data transmission period 48us=250us
The elapsed time of descending response packet is: T2=receives 244us+ data transmission period 56us=300us start-up time
So the energy that radio communication once consumes is:
E＝(T1×13+T2×18)×10
-6/3600＝2.4×10
-6maH
Once calculating the consumed energy in 1 year of communication by communication in one second is 75.68maH.
Standby mode is that the wireless entrance guard lock is not swiped the card and the action of switch door, does not also have data to need to communicate by letter with host computer, and wireless just shaking hands kept the existence of link.
Aforementioned calculation result is the power consumption data under the better situation of communication, the action of data re-transmitting and door lock, RFDC needing also can occur at ordinary times, and consumed energy also has some increases.This shows that the electric weight that wireless entrance guard lock consumes is very low, for battery-operated guarantee is provided, each wireless entrance guard lock all can satisfy a plurality of door locks by unique mailing address and communicates by letter with host computer simultaneously simultaneously, is convenient to system group network.
Adopt open 2.4G frequency range to carry out radio communication in the present embodiment; There is considerable equipment also using this frequency range in this frequency range; Like Wifi, bluetooth, wireless phone; Zigbee or the like, can wireless entrance guard lock control protocol method determining when satisfying real-time and reliability requirement, satisfy the requirement of little power consumption, below in conjunction with Fig. 3 wireless entrance guard lock control protocol method concrete steps elaborated:
Step (1) wireless entrance guard lock judges that wireless chaining status whether for setting up state, if jump to step (2), otherwise jumps to step (3); The described state of setting up is that wireless entrance guard lock and wireless host computer can proper communications; Described wireless host computer is wireless extensions module or primary controller;
Step (2) wireless entrance guard lock judges and has or not data to be sent, if having then skip to step (4), otherwise skips to step (3); Described data to be sent comprise brushing card data, door lock action data, battery electric quantity, the data of replying wireless host computer, code data, off line record data.
Step (3) wireless entrance guard lock sends empty bag, and transmission skips to step (5) after accomplishing; Described empty bag data structure is 8 lead codes+32 bit address sign indicating number+8 CRC check sign indicating number.
Step (4) wireless entrance guard lock sends wireless data packet, and transmission skips to step (5) after accomplishing; Described wireless data pack arrangement is 8 lead codes+32 bit address sign indicating number+N bit data content+8 CRC check sign indicating numbers.0＜N≤256 wherein;
Step (5) wireless entrance guard lock changes accepting state over to.Wireless host computer execution in step (6);
Step (6) is wireless host computer is judged has the data that need not issue, if having then issue wireless data packet, if do not have then issue with the sky bag.Wireless host computer is in listen mode always; In case receive the correct data bag that the wireless entrance guard lock sends, described correct data bag is that the address of wireless entrance guard lock transmission is identical with the address of reception, and CRC is correct; Wireless host computer can be intercepted a plurality of addresses simultaneously; Wireless host computer must send wireless data packet or empty packet start in the time of appointment, and it is few more that this time shorter then wireless entrance guard interlocking is received institute's power consumption stream, and this time is 200 microseconds in the present invention.Skip to step (7) after the execution;
Step (7) wireless entrance guard is locked judgement and is received reply data not, and whether detect transmission successful.Described transmission packet is successfully received response packet for the wireless entrance guard interlocking, and described response packet is that the address of wireless entrance guard lock transmission is identical with the address of reception, and CRC is correct.Wireless entrance guard has changed accepting state at once over to after being locked in and sending end; The wireless entrance guard lock requires in the time of appointment, need begin to receive packet or the empty bag that wireless host computer issues; The time span of this appointment is 10 microseconds～1000 microseconds; Adopt 200 microseconds in the present invention,, then be regarded as this and send failure if in this time, do not receive any data.Send failure if detect, then skip to step (8).Otherwise then skipping to step (1) and wireless host computer in the dormancy stand-by period shakes hands or sends data.
Step (8) wireless entrance guard lock detects inferior the counting to not of repeating transmission of appointment, if the repeating transmission number of times of appointment arrives, need lock communications status figure by wireless entrance guard and do further processing, skips to step (9), otherwise also need retransmit, and skips to step (12);
Whether step (9) wireless entrance guard lock judges the current wireless link for setting up state, and Fig. 5 is the wireless communication state transition diagram, if for setting up state, then under normal mode, the wireless entrance guard lock was shaken hands once with wireless host computer at interval in one second; Under quick mode, the wireless entrance guard lock is shaken hands once for 100 milliseconds with wireless host computer interval.Described normal mode is that wireless entrance guard lock and wireless host computer all do not have packet to be sent; Described quick mode is that wireless entrance guard lock or host computer have the packet that needs transmission; Radio Link successfully is set for setting up state if communicate by letter, skips to step (1), otherwise execution in step (10);
Whether step (10) wireless entrance guard lock judges the current wireless link for returning to form, and described returning to form to communicating by letter last time to setting up state retransmitted the back failure through 3 times.If for returning to form; Then increase the transmission number of times of setting; The communication frequency of selected again wireless entrance guard lock and wireless host computer from frequency meter; Again the position of communication frequency in frequency meter after selected is the next one of this communication frequency position in frequency meter, if this communication frequency is then selected the frequency of first position in the frequency meter in last position of frequency meter; In the communication frequency process of selected wireless entrance guard lock again and wireless host computer, wireless host computer communication frequency resets the required time and resets the required time more than or equal to the wireless entrance guard lock; Send packet then; Radio Link successfully is set for setting up state if communicate by letter, skips to step (1), otherwise execution in step (11); Described frequency meter is one group of frequency of operation that wireless entrance guard lock and wireless host computer are arranged in advance, has adopted 12 frequencies in the 2.4G frequency range in the present invention.
Step (11) wireless entrance guard lock judges whether the current wireless link is lost condition, and described lost condition is communication after returning to form still failure.If be lost condition, the transmission number of times of then setting is 1, presses the frequency meter medium frequency and selectes successively and send sky and wrap from little big order, and the host computer communication frequency remains unchanged in this process.Lose the frequency that the back both that writes to each other needs frequency hopping to avoid being disturbed at wireless entrance guard lock and host computer; Fig. 6 is wireless entrance guard lock and host computer frequency hopping synoptic diagram; The frequency hopping speed of wireless host computer will be much slower than the frequency hopping speed of wireless entrance guard lock; That is to say that wireless host computer keeps the time of a frequency will satisfy the time of jumping whole frequencies greater than the wireless entrance guard lock, can both set up communication so that no matter wireless host computer is in any one frequency wireless entrance guard lock of frequency meter qualification.Lock is in the communication loss state if wireless in the present invention host computer is found wireless entrance guard, changes a secondary frequencies 2 seconds.Radio Link successfully is set for setting up state if communicate by letter, skips to step (1).
Present embodiment as shown in Figure 5 has also increased the sinking state before wireless lost condition.The sinking state is that wireless entrance guard is locked time wireless chaining status for returning to form; After the recovery policy failure; Need full frequency hopping to come restoring communication, the sinking state is retransmitted number of times greater than lost condition, is set in the present embodiment 2 times; Through still setting up communication after 8 strategy processing of sinking, then wireless entrance guard lock wireless chaining status changes lost condition over to.The sinking state is not that the present invention is necessary, and its restoring communication has quickly been arranged.
Step (12) wireless entrance guard lock judges whether arrive, if skip to step (1), otherwise the dormancy stand-by period is to skipping to step (1) again if retransmitting the time interval;
Fig. 4 locks the retransmission interval synoptic diagram for different gate inhibitions.In the wireless telecommunications process; A plurality of wireless entrance guard locks might be in same time transmission packet when communicating by letter with wireless host computer; Can cause that like this interference each other causes communication failure, through the success that the different repeating transmission time intervals retransmits when guaranteeing data collision to occur is set.
Claims (1)
1. the large real-time wireless networking door control system of dry cell power supply; Comprise entrance guard management server, pc client, LAN, primary controller, wireless extensions module and wireless entrance guard lock; Entrance guard management server, pc client and primary controller are connected with local area network signal; Primary controller is connected with the wireless extensions module by signal, and the wireless extensions module is connected with the wireless entrance guard lock signal
Described entrance guard management server, pc client and primary controller are connected the existing local area network communication mode that adopts with local area network signal; Described primary controller and wireless extensions module adopt the RS485 agreement to communicate; Described wireless extensions module is connected with the wireless entrance guard lock signal, adopts control protocol to communicate between wireless entrance guard lock and the wireless extensions module;
It is characterized in that described control protocol method comprises the steps:
Whether step (1) wireless entrance guard lock judges wireless chaining status for setting up state, if set up state, then execution in step (2) then jumps to step (3) if not the state of setting up; The described state of setting up is wireless entrance guard lock and wireless host computer proper communication; Described wireless host computer is wireless extensions module or primary controller;
Step (2) wireless entrance guard lock is judged and is had or not data to be sent, if data to be sent are arranged, then skips to step (4), if do not have data to be sent then jump to step (3); Described data to be sent comprise brushing card data, door lock action data, battery electric quantity, reply the data of wireless host computer;
Step (3) wireless entrance guard lock sends empty bag, and transmission skips to step (5) after accomplishing; Described empty bag data structure is made up of 8 lead codes, 32 bit address sign indicating numbers and 8 CRC check sign indicating numbers;
Step (4) wireless entrance guard lock sends wireless data packet, and transmission skips to step (5) after accomplishing; Described wireless data packet is made up of 8 lead codes, 32 bit address sign indicating numbers, N bit data content and 8 CRC check sign indicating numbers, wherein 0＜N≤256;
Step (5) wireless entrance guard lock changes accepting state, wireless host computer execution in step (6) over to;
Step (6) is wireless host computer is judged has the data that need not issue, if the data that need issue are arranged, then issues wireless data packet, if there are not the data that need issue, then issues empty bag; Wireless host computer is in listen mode always, in case receive the correct data bag that the wireless entrance guard lock sends, then wireless host computer sent wireless data packet or empty bag in the time of appointment, and it is few more that the time of appointment shorter then wireless entrance guard interlocking is received institute's power consumption stream; Described correct data bag is that the address of wireless entrance guard lock transmission is identical with the address of reception, and CRC is correct;
Step (7) wireless entrance guard is locked judgement and is received reply data not, and whether detect the transmission packet successful; Described transmission packet is successfully received response packet for the wireless entrance guard interlocking, and described response packet is that the address of wireless entrance guard lock transmission is identical with the address of reception, and CRC is correct; Wireless entrance guard has changed accepting state at once over to after being locked in and sending end; The wireless entrance guard lock requires in the time of appointment, to receive packet or the empty bag that wireless host computer issues; The time span of appointment is 10 microseconds～1000 microseconds; If in this time, do not receive any data, then be regarded as this and send failure; Send failure if detect, then skip to step (8); Send successfully if detect, then get into the dormancy waiting status and then skip to step (1) up to the time;
Step (8) wireless entrance guard lock detects inferior the counting to not of repeating transmission of appointment, if the repeating transmission number of times of appointment arrives, step (12) need retransmitted and jump to execution in step (9) if the repeating transmission number of times of appointment does not arrive, also;
Whether step (9) wireless entrance guard lock judges the current wireless link for setting up state, if for setting up state, then under normal mode, the wireless entrance guard lock was shaken hands once with wireless host computer at interval in one second; Under quick mode, the wireless entrance guard lock is shaken hands once for 100 milliseconds with wireless host computer interval; Described normal mode is that wireless entrance guard lock and wireless host computer all do not have packet to be sent; Described quick mode is that wireless entrance guard lock or host computer have the packet that needs transmission; Radio Link successfully is set for setting up state if communicate by letter, jumps to step (1), if communicate by letter success, then execution in step (10);
Whether step (10) wireless entrance guard lock judges the current wireless link for returning to form, and described returning to form to communicating by letter last time to setting up state retransmitted the back failure through 3 times; If for returning to form; Then increase the transmission number of times of setting; The communication frequency of selected again wireless entrance guard lock and wireless host computer from frequency meter; Again the position of communication frequency in frequency meter after selected is the next one of this communication frequency position in frequency meter, if this communication frequency is then selected the frequency of first position in the frequency meter in last position of frequency meter; In the communication frequency process of selected wireless entrance guard lock again and wireless host computer, wireless host computer communication frequency resets the required time and resets the required time more than or equal to the wireless entrance guard lock, sends packet then; Radio Link successfully is set for setting up state if communicate by letter, jumps to step (1), if communicate by letter success, then execution in step (11); Described frequency meter is one group of frequency of operation that wireless entrance guard lock and wireless host computer are arranged in advance;
Step (11) wireless entrance guard lock judges whether the current wireless link is lost condition, and described lost condition is communication after returning to form still failure; If be lost condition, the transmission number of times of then setting is 1, presses the frequency meter medium frequency and selectes successively and send sky and wrap from little big order, and the host computer communication frequency remains unchanged in this process; Lose the frequency that the back both that writes to each other needs frequency hopping to avoid being disturbed at wireless entrance guard lock and host computer; Radio Link successfully is set for setting up state if communicate by letter, skips to step (1);
Step (12) wireless entrance guard lock judges whether arrive, arrive if retransmit the time interval if retransmitting the time interval, then skip to step (1), do not arrive if retransmit the time interval, gets into the dormancy waiting status, then jumps to step (1) up to the time.
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