CN1015768B - Full-duplex non-centric multichannel common type movable communication network - Google Patents
Full-duplex non-centric multichannel common type movable communication networkInfo
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- CN1015768B CN1015768B CN 89104328 CN89104328A CN1015768B CN 1015768 B CN1015768 B CN 1015768B CN 89104328 CN89104328 CN 89104328 CN 89104328 A CN89104328 A CN 89104328A CN 1015768 B CN1015768 B CN 1015768B
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Abstract
The present invention relates to a centreless (namely full distributed control) full duplex mobile communication network. The communication network is characterized in that a telephone and a fax machine and a computer are carried out according to an alien frequency full duplex mode, according to the requirements of four kinds of wire/ wireless switching transmission service, a set of corresponding control software and terminal interfaces are designed so that all networking control functions are automatically completed by user terminals, and special persons' attention is not required. The cost is reduced, and the networking communication is convenient. The present invention has the characterized in that a smooth four-level modulation technique is used, and the problem that a frequency spectrum of a modulated digital signal can be compatible with a frequency spectrum of a voice modulation signal in a mobile station under the speed rate of 8 kb/s is solved; the present invention satisfies national 80 serial station standard, the existing commodity mobile station can be compatible with the transmission of a digital signal, and a novel station does not need to be designed and produced.
Description
The present invention relates to a kind of networking technology of mobile communication.
At present, existing various networking technology mainly is divided into has center control net and no center to control two kinds on net." the public mobile telephone network-Cellular Networks " that occur at the seventies is a kind of duplex communication facility that center control is arranged based on phone.This net is made of many subareas (honeycomb).Several (such as 7) honeycomb constitutes a honeycomb group, can frequency reuse between the honeycomb group and non-interference.Be equipped with zone center (base station) in each honeycomb, travelling carriage can also can connect and communicates by letter with fixed-line subscriber by zone center with other mobile communications by zone center and local network, as the AMPS of the U.S., the TACS system of the NMTS in Northern Europe and Britain all belongs to such public mobile telephone network.This weak point that has center control to net is that investment is big, the equipment complexity of base station, and survivability is poor, in case base station is destroyed, whole communication network can not be worked with regard to paralysis.Fa Zhan " mobile communication system of distributed control " was a kind of no center control net in recent years, and the difference of it and cellular communication net is not establish base station, went and controlled function is distributed in each travelling carriage.The travelling carriage of participating in this system all has identical controlled function, can produce automatically and the identification control signaling, automatically select idle channel and set up liaison automatically, and invest little, capability to resist destruction is strong, and what 1987 the 4th phases multi-channel access system without cent mobile communication special edition " mobile communication equipment " periodical of publishing as Ministry of Electronics Industry Guangzhou communication research institute was said is exactly this.But the maximum deficiency of this system is: (1) half-duplex operation, use inconvenience; (2) be difficult for realizing being connected with local telephone network; (3) can not transmit multiple business.
The objective of the invention is to overcome the weak point of above-mentioned prior art, and provide a kind of have phone, data, fax multiple business and can with the no center full duplex distributed communication network of wired network interface.
Networking process of the present invention is to receive and launch signal of communication with the full duplex mobile station, and realizes the foundation of communication line automatically by communication controler, and the mode of setting up of this communication line is divided into transfer and straight-through dual mode.Because special-shaped platform (A, B) transmitting-receiving frequency is an interworking between, therefore, can directly communicate, but the transmitting-receiving frequency of homotype platform (as two A type platforms) is in same frequency range respectively, so the communication between them needs just can communicate after other two special-shaped platforms (as two Type B platforms) forwarding.The process of setting up of direct circuit: be) by calling out platform A(source platform in the space with F
1Frequency call out another special-shaped platform B(purpose platform), the line is busy if do not have, after then the Type B platform is received calling, by communication controler control immediately with f
1Rate response, enter communication process subsequently, as shown in Figure 4.The process of setting up of transfer circuit as shown in Figure 5, its step be divided into following 4 the step:
(1) source platform A
1With F
1Frequency call out travelling carriage B in the space
1, if B
1General rule does not continue to use F
1Frequency call out next travelling carriage B
2Do a transfer, if B
1Platform is replied, then A
1Platform is parked in F
1Frequency on wait replying of secondary transfer.
(2) B
1Platform has been replied A
1Behind the platform, again with f
2Frequency call intent platform A
2, at the appointed time if no A
2Platform is replied, then B
1Platform returns f
1Frequency on tell A
1The line is busy for platform, if A
2Platform is replied, then B
1Platform is parked in receive frequency F
1With tranmitting frequency f
2Channel on.
(3) A
2Platform has been replied B
1Behind the platform, still use F
2Frequency call out B
2Platform, in official hour if no B
2Reply, then change and exhale another B
3Platform is done the secondary transfer, if B is arranged
2Reply then and stop call.
(4) B
2Platform is received A
2Platform is used f after calling out
1Frequency to source platform A
1Send and reply, A
1After platform is received and replied, this is replied pass through B again
1Platform is given to purpose platform A
2, homotype platform A like this
1With A
2Between communication line set up, enter communication process subsequently.
For make communication controler automatically identification communication be straight-through or transfer, and realize the foundation of communication automatically, the address that the present invention sets A type platform all is an odd number, location, Type B tableland all is even number (also can on the contrary).After main page station user all sent into controller with location, purpose tableland, controller can more main page station and is determined to adopt straight-through still transfer communication mode by strange, the even number of address, page station.
Comprise hardware designs and Control Software two large divisions in the Control on Communication of the present invention, wherein hardware components comprises base band signal process and phone, facsimile machine, computer, has/four terminal interfaces of wireless converting.This base band signal process adopts level and smooth constant envelop 4-level frequency modulation mode, in the relation of making a start according to the front and back code element, select smooth function, calculate the baseband waveform of level and smooth four level modulation, with computer this waveform is solidificated in the waveform storage EPROM, the characteristics according to input signal sequence constitute address signal then, choose corresponding Wave data from EPROM again, conversion becomes digital signal into analog signal through D/A, carries out high frequency modulated at last.This Control Software is according to isofrequency full-duplex function and phone, facsimile machine, computer, have/four kinds of transport services of wireless automatic switching design.The whole control software comprises that channel search and service request detect, and special-shaped platform is called out, and the homotype platform is called out, the transfer of data service and miscellaneous service command transmitting.This software all writes in the microprocessor of controller.The transfer mode of four kinds of business is respectively: phone and facsimile adopt circuit switching mode, and message switching scheme is adopted in compunication, and wherein computer and facsimile all are digital modulation.Telephone service then is that digital signalling is set up communication line, and when entering talking state behind the other side's off-hook, channel switches to analog-modulated by digital modulation.
Channel of the present invention is chosen and is adopted arbitrary channel all to can be used as the working method of communication channel, and all radio station its receiver when waiting for is all taken turns scan flow successively on all channels, and closes transmitter.When source platform (main page station) when service request is arranged, controller is determined an idle channel according to scanning result, and opens transmitter and send call signal on this channel.Other users' receiver is basis then: (a) be scanned channel if idle (according to whether there being carrier signal to judge whether the free time on this channel) then continues scanning; (b) if channel is not idle, then detect whether call out oneself,, then continue scanning,, then stop scanning, open transmitter, send by concord and answer signal if call out oneself if not call out oneself.
The present invention is owing to employing isofrequency full-duplex and multi-channel multi-service networking technology, and all networking controlled function are finished automatically by each user terminal, have not only reduced cost, the more important thing is to be convenient to group-net communication; Simultaneously because the present invention has adopted four level narrow-band FM technology, solved under 8kb/s speed, the frequency spectrum of digital modulated signal (FM signal) can with the compatibling problem of frequency spectrum in mobile station of speech modulation signal, and satisfy country's 80 serial radio station standards, make the transmission that existing commodity mobile station can the compatible with digital signal and needn't design and produce novel radio station.
To do further narration to the present invention below in conjunction with drawings and Examples.
Fig. 1 is a system block diagram of the present invention.
Fig. 2 is a modulator principle block diagram of the present invention.
Fig. 3 is the smooth function figure that the present invention adopts level and smooth constant envelop 4-level frequency modulation.
Fig. 4 is the schematic diagram of setting up of direct circuit of the present invention.
Fig. 5 is the schematic diagram of setting up of transfer communication circuit of the present invention.
Fig. 6 is a communication control program block diagram of the present invention.
Fig. 7 is the channel search flow chart of Control on Communication of the present invention.
Fig. 8 is the calling order block diagram of the special-shaped platform of the present invention.
Fig. 9 is the calling order block diagram of homotype platform of the present invention.
Figure 10 is the transfer flow chart of data service of the present invention.
Figure 11 is a telephone service signal procedure block diagram of the present invention.
Figure 12 is the disconnect program block diagram of telephone service communication of the present invention.
Figure 13 is a fax service flow chart of the present invention.
Figure 14 is the professional signal procedure block diagram of computer of the present invention.
Figure 15 is that the present invention has/wireless converting and the interior difference flow chart of communicating by letter of wireless network.
Figure 16 is a radio interface graph of a relation of the present invention.
Figure 17 is a computer interface graph of a relation of the present invention.
Figure 18 is facsimile machine interface relationship figure of the present invention.
With reference to Fig. 1, communication network of the present invention is to be made of N user.Each user is furnished with a duplexing radio station and a communication controler and own needed terminal equipment.The number of users of minimum generally speaking net is N=4, and duplexing radio station is divided into two kinds of A type platform and Type B platforms, and the radio station of two kinds of models approximately respectively accounts for half (during N=4, then must A, each 2 of Type B platforms) in net.The duplex radio station joins by radio interface and controller, controller by telephony interface, computer interface, facsimile machine interface, have/four kinds of interfaces of wireless converting respectively with dial telephone set, computer, facsimile machine, have/wireless swticher is connected.Controller is to be made of baseband signal processor and microprocessor two parts hardware and various interface.With reference to Fig. 2, modulator comprises address generator, wave storage (EPROM 2716), D/A converter and active low-pass filter.Wherein among the EPROM criterion of data computation be before and after waveform smooth connection as much as possible between the code element, and the zero crossing of each code element must be accurately.The input data of the embodiment of the invention are 16kbps, and each code element has four level 00,01,10,11, and its deposit data is that the current code element of supposition is A
0, the code element in past is A
-1, following code element is A
+ 1In order to obtain the smooth waveform in this code element, get working as A
-1, A
0, A
+ 1During for different numerical value, adopt different smooth function waveforms, as shown in Figure 3.The wave function of (1) is s(t among the figure)=2.5+0.5s
n(t), the wave function of (2) is s(t)=2.5-0.5s
n(t), the wave function of (3) is s(t)=1.5+1.5s
n(t), the wave function of (4) is s(t)=2.0-z(1.0-t), other curve gets by marking curve (1), (2), (3), (4) rotation translation, wherein s
n(t)=Asin(Bt), 0≤t≤2.0, z(t)=Cexp(-Dt)+Et+Gcos(Ht), and 0＜t≤1.0, A, B, C, D, E, F, G, H are the constants of determining.In order accurately to reflect s(t) value, reduce quantizing noise, in each code-element period, get 32 sample points, each sample point is quantized into the data of 8 bits, the 2k byte among the corresponding EPROM.And the data of depositing are by A
+ 1, A
0, A
-1Sequence arrangement from small to large.
The communication control program of the embodiment of the invention is mainly finished networking and two tasks of communication service.Wherein networking comprise the dynamic management of channel and distribution, dial automatically multiple access and full duplex networking, communication service comprises phone, fax, computer, has/communication of wireless converting multiple business.This program is write as with the Z-80 assembler language, and mainly by initialization, channel search and service request detect, and main processing and the quilt of exhaling exhaled processing supervisor piece to form, and its process as shown in Figure 6.Wherein initialize routine finish to Z-80 series interfaces chips such as CTC, PIO, SIO preset and to the zero clearing of all working unit.
When controller was in wait state, program carries out channel search and service request detects.This section program is mainly finished each channel in netting is searched for and carrier wave detects whether determining this TV station by other calling successively, and alternately detects and have or not service request to determine whether this TV station will send calling.When having detected service request, program just enters the main processing procedure of exhaling.This section program is formed the call frame of different content according to kind of service request (phone, fax, computer, have/wireless converting) and purpose platform type (special-shaped platform, homotype platform), and drive transmitter and send calling, reply when correctly receiving, then change the corresponding communication service routine over to.After communication is finished, return initialization.When having detected carrier wave on a certain channel, and when receiving this TV station address code, program enters and is exhaled processing procedure.This section program is determined the effect of this TV station in this communication process according to the corresponding information in the call frame that receives, and promptly this TV station is direct purpose platform, still first intermediate station or second intermediate station or transfer purpose platform.If this TV station is direct purpose platform, then judges class of business, and change corresponding service routine over to after driving transmitter; If first intermediate station is then searched for another idle channel, open transmitter call intent platform, enter forwarding state then; If transfer purpose platform then should be called out second intermediate station, change corresponding service routine then over to; If second intermediate station then enters forwarding state.
The specific procedure process of each program block is as follows respectively:
1. channel search process
The channel search process as shown in Figure 7.The numerical value of channel counter is put 1, take out the channel parameter of this numerical value correspondence then and deliver to the radio station, make the radio station in this channel work, detect after " time-delay " 300 milliseconds have on this channel do not have " carrier wave is arranged? " if there is not carrier wave (N), then look into again the business that has or not this TV station " request? " if carrier wave (Y) arranged, then judge this moment at " calling this TV station? "
When " request " checked, two results are arranged, if request (Y) arranged, executive program " alternation of hosts exhales processings " process then, if do not ask (N), judge again that then present channel is " last channel? "
" calling out this TV station? " during judgement, its result is when calling out this TV station (Y), and then executive program " changes and exhaled processing "; If the result for be not the calling this TV station (N), judge again that then present channel is " last channel? "
The judged result branch of last channel: be not (N), then the numerical value with channel counter increases 1, returns " get channel parameter and put this channel " process then, and will search on new channel this moment; If judged result is for being (Y), then illustrate all channels all one by one search finish, just directly return " channel is counted and put 1 " this moment, make channel search since the 1st channel, the repeat search process.
2. special-shaped platform calling procedure
The calling procedure of special-shaped platform as shown in Figure 8.When this TV station has service request, after controller receives the quilt of self terminal to exhale the address, open this TV station transmitter, judge then exhaled that used radio station, address and this TV station are " special-shaped platform? " if not (N), program " is changeed homotype platform calling procedure ", if (Y), then will be exhaled address " composition call frame ", " put and call out transmit frame " again call frame is launched by the radio station, this moment timer is changed to " regularly 10 seconds ", with the restriction call time, after this state " puts to receive and reply " to program, several situations below handling:
Judged whether that at first " receive interrupt " return? if not (N) then judge whether it is that " send and interrupt " returned? if neither (N), judge whether it is " to be timed to " time again? if (Y), this call failure then is described, detect the request port this moment again, whether effectively determine to carry out to prepare to return the stand-by state program according to it, abandon this time calling out.If not " being timed to " is (N), then return " receive and interrupt " and judge, continue to receive.
Secondly, being judged as " receive and interrupt " is under (Y) condition, judge whether " harvesting " again? if " do not harvest " (N), promptly also do not reach predetermined data length, then get back to " receive and interrupt ", continue to receive, if harvest (Y), then judge receive data are called party is beamed back " correctly replying? " if not, then abandon these data, get back to " put to receive and reply ", repeat receiving course.If (Y), illustrate that then calling procedure correctly finishes, change over to this moment " service routine ".
The 3rd, being judged as " send and interrupt " is (Y), then whether judge this call frame again " distributing "? if do not distribute (N), then get back to " receive and interrupt ", continue to receive, if this call frame distributes (Y), then " repeat to send call frame ", be about to this call frame and retransmit once, get back to " put to receive and reply " after having put, be about to this call frame and retransmit once, get back to " put to receive and reply " after having put, repeat above-mentioned receiving course.
3. homotype platform calling procedure:
The calling procedure of homotype platform as shown in Figure 9.Calling between this homotype platform is finished by transferring in the special-shaped platform, and the direct calling object of any one remains special-shaped platform, so the explanation of concrete calling procedure and Fig. 8 is identical, illustrates that here the homotype platform calls out and Fig. 8 difference.Fig. 8 " special-shaped platform? " change this process when being judged as N over to.
At this moment the first step work of main page station is " determining first transfer ", and here, an optional special-shaped platform number is made first intermediate station, and it and purpose platform number are formed call frame together.Enter then " send out call out ", and need do three work, one, with call frame at an idle channels (F for example
1) constantly repetition launches, up to receive first intermediate station reply or launch be timed to till, they are two years old, after receiving the replying of first intermediate station, also will discern and transmit by the answer signal of second intermediate station and give first intermediate station, the 3rd step was the answer signal that receives and identifies first and second intermediate stations, and the answer signal of receiving second intermediate station just represents that the calling procedure of this TV station finishes.
First intermediate station, " receipt of call frame " comprise from the call frame of receiving confirms that this TV station is the working channel of first intermediate station, purpose platform number and main page station, and with receiving channels (F
1) corresponding channel (f
1) upward beaming back this TV station to main page station has received the affirmation of calling (promptly first intermediate station replys) signal, " search idle channels ": owing to main page station occupied channel (F
1And f
1), so this TV station needs idle channels of repeat search (f for example
2), for this TV station use that transmits." call intent platform " reformulates call frame according to contents such as existing addresses, with the idle channels f that finds
2Send calling to the purpose platform, " putting the transfer channel ", on one side the repeat its transmission call frame, on one side with f
2Corresponding F
2Wait replying of purpose platform on the channel, just stop to launch call frame, and the receiving channels of this TV station is changeed back the transmitting channel F of main page station in case receive the answer signal of purpose platform
1, and the transmitting channel of this TV station still is the original f that uses
2, this TV station end of calling.
Purpose platform, " receipt of call frame " are confirmed to be the main page station of homotype and call out this TV station, with the corresponding channel F of first intermediate station use
2To first intermediate station emission purpose platform answer signal." determine second intermediate station ", select other special-shaped platforms that remove first intermediate station number number to make second intermediate station." call out second transfer ", second intermediate station number, main page station number, main page station working channel number etc. are formed call frame, still at F
2On send calling, till receiving the replying of second intermediate station, the second intermediate station answer signal of this moment is not directly to receive from second intermediate station, but second intermediate station is issued main page station, after the identification of main page station, be transmitted to first intermediate station, be transmitted to the purpose platform through first intermediate station again, this TV station is received the answer signal sign of second intermediate station, and the calling procedure of whole homotype platform finishes.
Second intermediate station, " receipt of call frame " confirm that this TV station is second intermediate station, transmitting channel of this TV station and main page station number." put the transfer channel " transmitting channel is changed to the receiving channels f of main page station
1, and on this channel, sending the second intermediate station answer signal to main page station, receiving channels still is left F
2
4. the transfer process of data service
The transfer process of data service as shown in figure 10.When between the homotype platform, carrying out transfer of data, select a special-shaped platform number to make intermediate station by main page station and number form call frame, at an idle channels (F for example
1) on launch, and wait for that intermediate station replys, its detailed process is identical with Fig. 8.Receive that the back expression communication line of replying of intermediate station sets up, transmit data procedures thereupon, be divided into some frames with a file this moment, send one by one frame by frame, whether every transmission one frame all waits the intermediate station answer and correctly receives, if correctly then send out next frame, if incorrectly then retransmit original frame.Whole file distributes and for after all correct reception of intermediate station, transmitter is closed in main page station, and program is got back to stand-by state.
Data are replied and received to intermediate station " " at F
1Confirm that this TV station is the data relay platform after receiving the calling of main page station on the channel, with F
1Corresponding channel f
1On reply main page station, receive data then, every reception one frame is all answered once " approval " (correct receive) or " not approving " (correctly receiving).To the frame of having approved, deposit in the controller of this TV station, after a file is received, has been deposited, the communication between constipation bundle and the main page station." the call intent platform also transmits data ": reformulate call frame, at f
1Last call intent platform, receive the replying of purpose platform after, the file that deposits in is previously taken out, and with transmitting the identical mode of data to intermediate station, to purpose platform transmission data, till file has transmitted with main page station.
The purpose platform is at f
1On receive the calling of intermediate station after, at F
1On reply intermediate station, enter the reception data procedures then, the reception data procedures of this process and intermediate station is identical.
5. the communication process of telephone service
The communication process of telephone service is to carry out after calling procedure finishes, as shown in figure 11.Main page station is to exhaling the end telephone set to send ring-back tone, and wait the on line instruction that the purpose platform sends (promptly exhaled to hold and take telephone set), after receiving the on line instruction, stop ring-back tone, and carry out digital-to-analog and switch, be about to digital channel and disconnect, connect the simulated voice passage, the caller can carry out and be exhaled the dialogue between the end.At this moment, sent ring back tone by the page station to telephone set, and detect telephone set whether " off-hook "? if be judged as not off-hook (N), then continue to detect, if be judged as off-hook (Y), then stop to send ring back tone, and send the on line instruction, and carry out digital-to-analog then and switch, disconnect digital channel, connect the simulated voice passage, exhaled this moment end just can talk with the main end of exhaling.
6. the disconnect process of telephone service communication
In the process of telephone communication, whether controller will detect wireless channel and interrupt and whether on-hook of telephone set, in case above-mentioned situation occurs, just removes the circuit of having set up, the abort communication service, program is returned init state (main page station is with identical by the page station) as shown in figure 12.
At first timer is put " regularly one second ", program is opened interruption then, wait for " interruption is returned ", do you judge that regularly one second time arrives not this moment? if arrive (Y), illustrate that wireless channel has interrupted one second, can not guarantee to communicate by letter and normally carry out, carry out " clear " so send out the signaling of taking out stitches, " send out busy tone " to telephone set again, signal teller on-hook, the port that " detects the phone request " at this moment, judge request whether " having? " if (Y) arranged, also not on-hook of phone is described, so get back to " detecting the phone request ", there be not (N) if be judged as, on-hook is described, stop paying out busy tone this moment, and return initialization.
" if the time arrives? " be judged as not to (N), then " detect phone request " port whether judge telephone set " on-hook? " if there is not on-hook (N), illustrate to talk with and proceeding, carry out this moment " the carrier wave detection " of wireless channel, whether see carrier signal " having? " if there is not carrier wave (N), the channel variation is described, but do not take out stitches immediately, continue to detect but return " opening interruption ", this program guarantees only to disappear more than one second when carrier wave is continuous, just can produce because of carrier wave disappears and remove circuit.If carrier wave has been judged as (Y), illustrate that channel quality is good, so get back to " regularly one second ", timer was changed to one second again.If on-hook is judged as on-hook (Y), end-of-dialogue is described, for the mistake on-hook action that prevents that other reasons from producing, declare again after " so delaying time 640 milliseconds " once whether " on-hook? " if mistake is hung (N), then proceed " carrier wave detection ", if be judged as on-hook (Y), then return initialization, finish and take out stitches.
7. facsimile machine process of communication service
The communication service of facsimile machine is divided into originating party and two channels of debit, as shown in figure 13.Wherein:
Originating party: after finishing calling procedure, controller is automatically with " connection circuit " between originating party and the debit's facsimile machine, enter the facsimile machine communication process, at this moment, the level that controller is sent here facsimile machine carries out " sampling " with the speed of 4 kilobits/second, and to data from the sample survey by " byte assembling ", then by byte with software realization " differential coding " and " biphase coding ".This encoding process is in order to make data be suitable for the wireless channel transmission, coded data is sent to transmitter " transmission " and goes out, detect simultaneously will " take out stitches? " for example channel interruption, fax have finished and reason such as shutdown, if be judged as do not take out stitches (N), then go back to continue " sampling ", if be judged as to take out stitches (Y), then return initialization, ending said process.
Debit: after " circuit connection ", controller " reception data ", and carry out " two phase decoders " with software and reach " differential decoding ", reduction of data is the initial data of facsimile machine after, send into " data sending fax machine ", again file or the figure that is transmitted by the facsimile machine recovery.Also detect at this moment will " take out stitches? " if do not tear (N) open, then get back to " reception data ", continue facsimile posting, if judgement will be torn (Y) open, then return initialization, ending said process.
8. the professional communication process of computer
Adopt asynchronous communication means between computer and the controller, utilize serial interface chip SIO in the asynchronous communication card of computer-internal and the controller, realize data transmission service, its process as shown in figure 14.
Under the professional condition of computer, do " receipts? " earlier judge that if receive (Y), then controller receives the data from computer, if not receive (N), then is that this TV station is received the data that calling party is sent certainly, send data to we's computer.
During data that receiving computer is sent here, be to receive by byte, whenever " receive a byte ", judge whether be " data? " if byte is continued to receive in the back (Y) then " to send out the approval instruction " to computer, if not (N), judge whether then that to be computer initiate to controller " calling? " if (Y), byte is continued to receive in the back also " to send out the approval instruction ", if not (N), then declare " being to finish? " again if (Y), illustrate that computer data all sends into controller, so after sending out the approval order, return main program, enter calling procedure, send data to (or through transfer) purpose platform then.If not finish (N), then explanation is the misoperation that other reasons causes, so after not approving order, return main program, enters stand-by state.
Be to send frame by frame when computer send data, at first " send out call frame ", this frame include file length, contents such as form to computer." wait acknowledge ", judge (computer) " the other side's approval? " not if (N), " send out call frame " then again, if approval (Y), then " send out frame data ", judge whether " the other side's approval? " again not if (N), then " repeating transmission previous frame " is if approval (Y), then check whether " distributing? " if frame number does not distribute (N), then return " sending out frame data ", send next new data frame, if " distributing? " be judged to is (Y), then all Frames are all delivered in the computer, " send out the finish command " at this moment, tell this process to finish, if the other side does not approve, just continue to send out the finish command, after receiving that the other side approves, return main program, ending said process.
9. have/the wireless converting process
It is identical to communicate by letter in communication process between wire telephone and the radiophone and the wireless network, difference only be to collect the digits and the number of sending on.
When radio telephone pulls out wire telephone, at first pull out " 0 ", then pull out debit's radio station number and telephone number.At this moment, the debit has delivered to cable phone number/wireless swticher automatically, just can connect wire telephone after the interface of adapter is delivered to switch.
When telephone pulls out radio telephone and wireless network in the conversation identical.Its difference as shown in figure 15.
The master exhales end: when " collecting the digits ", the first step check that telephone set sends here " the first number is 0? " if not digital " 0 " (N), illustrate that then this Called Subscriber is the wireless user, after event " is put wireless call business " with class of business, only " receive radio station number ", harvest back i.e. " group calls in several frame ", if the first numeral is judged as " 0 " (Y), illustrate this time call out to liking wire user, so after " being equipped with the line call business ", the phone number figure place that controller is accepted increases, i.e. " receive radio station be added with wire size " with radio station number and after having wire size all to harvest " group calls in several frame ", enters the talk business process.
Exhaled end: after being called out, at first identification is " wired call business? " if (Y), then to " have/wireless swticher send wired (user's) number ", sent the back to wait for the telephone set of converting interface connection wire user, if not (N), then judge again be " wireless call business? " if then directly enter the talk business process, if neither (N) wireless call business, then judge whether again to be other business, as facsimile machine, computer etc.
10. the interface of radio station and controller
The interface of radio station and controller as shown in figure 16.Wherein microprocessor is the core of controller, and it finishes the control and the management of all communication control procedures.Transceiver channel preset with scan channel by integrated circuit U
121(model is 74LS273) finishes, and its output signal is transported to sending and receiving frequency preset circuit in the radio station from port (1).Parallel interface integrated circuit U
117(model is PIO) has 6 ports, and the function of each port is respectively:
Port PIO-A
3Deliver to the transmitter in radio station, the startup and shutdown that control transmitter.Port PIO-B
2Send switching signal to the interior electronic switch A of controller, voice signal and digital modulation signals are switched.Port PIO-A
6To in the radio station testing result in channel busy/spare time be sent into microprocessor.Port PIO-B
3The transfer control signal is sent into the radio station, whether put the transfer state with the decision radio station.Port PIO-A
1With port PIO-A
2Be connected to electronic switch B and control electronic switch B together, will serve sound and voice signal are transported to the radio station from port (2) high-frequency amplifier.
The telephone service sound produces circuit: the instruction according to microprocessor produces various service sounds such as free time, busy tone, ring, and delivers to electronic switch B through port (4).
Electronic switch A: will be from the voice signal of No. 5 mouths or the digital modulation signals of No. 6 mouths, select one, deliver to the voltage controlled oscillator in radio station through No. 3 mouths.
Electronic switch B: will select one from the service sound of No. 4 mouths or from the speech that the radio station of No. 7 mouths receives, and deliver to the audio frequency amplifier in radio station through No. 2 mouths.
11. telephony interface
Transmitter (Mic) → remove the Mic in radio station, speech sends
The SP in receiver (SP) → radio station comes, and speech is listened to
Off-hook, dialing device → go U in the controller
117(PIO-A
7), pluck/on-hook detects and collects the digits
Have/the wireless converting interface:
Wired transmission speech → go radio station Mic
The SP in wired reception speech → radio station comes
Wired dialing, off-hook → go controller U
117(PIO-B
1)
Wireless dialing is to wired ← controller U
117(PIO-B
3)
12. computer interface
Integrated circuit U in the controller
118Its B port is connected to level match device U
132And U
133, this level match device is connected to the RS232C end of computer, as shown in figure 17.(RS232C is the serial line interface that computer and external equipment swap data are used, and also is a kind of title of interface specification).
13. facsimile machine interface
The interface of facsimile machine as shown in figure 18.Parallel interface integrated circuit U in the controller
117Except that with 6 interfaces in above-mentioned radio station, also link to each other with 5 ports of facsimile machine, wherein the function of each port is:
Port PIO-A
5Be received from the start service request TREQ of facsimile machine.Port PIO-B
7The facsimile machine that the radio station is received is replied or picture intelligence is delivered to bidirectional electronic switch (C).Port PIO-B
0Call answered signal or picture intelligence that facsimile machine is sent here are sent into controller behind bidirectional electronic switch (D).Port PIO-B
6According to communication process, bidirectional electronic switch A and B are sent control signal, select corresponding signal.Port PIO-B
4Carry control signal to the ringing signal generating signal device, make it to produce or stop bell signal.
Bidirectional electronic switch C: when facsimile machine is started working, connect PIO-B
7Answer signal mouth ACKR with facsimile machine.When transmitting image, connect PIO-B
7Picture intelligence mouth G with facsimile machine
Out
Bidirectional electronic switch D: when facsimile machine is started working, connect PIO-B
0Call signal mouth ACKT with facsimile machine.When transmitting image, connect PIO-B
0Picture intelligence mouth G with facsimile machine
In
Ringing signal generating signal device: produce the bell signal of standard, deliver to the ring mouth BELL of facsimile machine, make the facsimile machine Auto Power On.
Symbol description in above-mentioned four kinds of interface relationships is as follows:
U * * * be the integrated circuit numbering in the circuit, as U
117, U
118, U
132, U
133
SIO is serial input and output integrated packages
PIO is parallel input and output integrated package, wherein PIO-A * for the A mouth number *
PIO-B * for B mouth numbering *
Claims (3)
1, a kind of method for building up that does not have center full duplex mobile communication circuit, be to receive and launch signal of communication with the full duplex mobile station, and realize the foundation of communication line automatically by communication controler, the mode that it is characterized in that communication foundation employing tieline road between the two special-shaped platforms (A and B), two homotype platform (A
1With A
2Or B
1With B
2) between communication set up to adopt the connected mode of transfer circuit, and the process of setting up of two kinds of line modes is respectively:
(a) foundation of direct circuit be by main page station A (source platform) in the space with f
AFrequency call out another special-shaped platform B (purpose platform), the line is busy if do not have, after then the Type B platform is received calling, by communication controler control immediately with f
BFrequency send and reply, enter liaison subsequently;
(b) foundation of transfer circuit is divided into following 4 steps:
(1) source platform A
1With F
1Frequency call out travelling carriage B in the space
1, if general rule does not continue to use F
1Frequency call out next travelling carriage B
2Do a transfer, if B
1Platform is replied, then A
1Platform is parked in F
1Frequency on wait replying of secondary transfer,
(2) B
1Platform has been replied A
1Behind the platform, again with f
2Frequency call intent platform A
2, at the appointed time if no A
2Platform is replied, then B
1Platform returns f
1Frequency on tell A
1The line is busy for platform, if A
2Platform is replied, then B
1Platform is parked in receive frequency F
1With tranmitting frequency f
2Channel on,
(3) A
2Platform has been replied B
1Behind the platform, still use F
2Frequency call out B
2Platform, in official hour if no B
2Reply, then change and exhale another B
3Platform is done the secondary transfer, if B is arranged
2Reply then and stop call,
(4) B
2Platform is received A
2Platform is used f after calling out
1Frequency to source platform A
1Send and reply, A
1After platform is received and replied, this is replied pass through B again
1Platform is given to purpose platform A
2, homotype platform A like this
1With A
2Between communication line set up, enter communication process subsequently.
2, communication circuit method for building up according to claim 1, it is characterized in that realizing the identification and the foundation of direct circuit and transfer circuit, A type platform (or the Type B platform) address that is the duplexing radio station of setting in controller all is an odd number, the address of Type B platform (or A type platform) all is an even number, after main page station user will all be sent into controller by the address, page station, parity by more main page station of controller and location, purpose tableland, decision employing direct communication mode still is the transfer communication mode again, and sets up the corresponding communication circuit.
3, communication line method for building up according to claim 1, it is characterized in that main page station and by the process of choosing of communication channel between the page station be: transmitter is closed in all radio station when waiting for, by receiver scanning successively on the channel of place, when source platform (main page station) when service request is arranged, controller is determined an idle channel according to the scanning effect, and opens transmitter and send call signal on this channel; Then whether channel is idle determines to continue scanning and still detects receiver user according to being scanned, if channel idle then continues scanning, if channel is not idle, then detect whether call out oneself,, continue scanning again if not call out oneself, if call out oneself, then stop scanning, open transmitter, send by concord and answer signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89104328 CN1015768B (en) | 1989-06-22 | 1989-06-22 | Full-duplex non-centric multichannel common type movable communication network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89104328 CN1015768B (en) | 1989-06-22 | 1989-06-22 | Full-duplex non-centric multichannel common type movable communication network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1048296A CN1048296A (en) | 1991-01-02 |
| CN1015768B true CN1015768B (en) | 1992-03-04 |
Family
ID=4855519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89104328 Expired CN1015768B (en) | 1989-06-22 | 1989-06-22 | Full-duplex non-centric multichannel common type movable communication network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1015768B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2396775B (en) * | 2002-12-23 | 2005-04-13 | Motorola Inc | Method and apparatus for establishing direct communication for mobiles in a radio communication system |
| CN1315352C (en) * | 2005-05-20 | 2007-05-09 | 深圳市三威电子有限公司 | Method for improving speaking quality of centreless multi-channel dress selection mobile communication system |
| CN101115277B (en) * | 2006-07-27 | 2010-09-29 | 展讯通信（上海）有限公司 | Isofrequency full-duplex communication method for digital non-center communication system |
-
1989
- 1989-06-22 CN CN 89104328 patent/CN1015768B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1048296A (en) | 1991-01-02 |
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