CN1384942A - Communications bridge for circuit switched data transfer simulation - Google Patents

Abstract

A communications bridge (300) for simulating circuit switched call links to user equipment receives data from the user equipment over a serial data interface (328). The communications bridge (300) simulates circuit switched call link responses back to the user equipment so that the user equipment believes that a circuit switched call link has been made. Data is sent through a second interface (336) to a wireless radio or GSM modem.

Description

The communications bridge that is used for circuit switched data transfer simulation

Background technology

1. invention field

The present invention relates to communication equipment field, particularly relate to a kind of communication facilities that is used for circuit conversion and the combination of packet switched Networks and Communications bridge.

2. background information

The equipment of monitoring and/or be installed in dwelling house, commercial affairs and the industrial comprehensive building of various places all over the world buildings is various subscriber equipmenies.This user's example comprises many meter reading devices, and these devices are measured various public consumption article by electricity or dynamo-electric converter, such as the consumption of rock gas, electricity and water.The meter reading device is analogue means normally, first reading of record measured public consumption article of a period of time and second reading any, perhaps, selectively, record circulation sum (that is, reach some after recycle accumulative total).

The attendant of government utility supply department checks the meter reading device of the consumption of record public consumption article common every month.The consumption that the instrument readout device is write down is fed to the database of the purpose that is used to make out the bill, and the user according to measured public consumption article consumes the invoice that generates a consumer then.

In the city, the quantity of the meter reading device that need write down is huge.Although send the expense in precalculated position can be by at ad-hoc location the attendant, for example, in high density dwelling house community (such as, apartment building complex) concentrate the meter reading device to slow down, it is huge that cost remains.Yet, carry out reading and slow down expense owing to a large amount of instrument readout devices can not be concentrated on a place usually, so cost is higher in the suburb.

Utility company has adopted various technology to reduce the cost of the attendant being sent physical location.

For example, a simple method is to use stochastic technique, calculates a measuring amount that is used for current reading according to the numerical value or the ambulant or seasonal mean value in one or more past.This technology is designed to reduce the frequency of meter reading.Yet a shortcoming of this technology is that the reading of calculating may be significantly less than or be higher than actual consumption, such as, under the situation that the user stays out or use is not served, the reading of reckoning is higher than actual consumption; And when extraordinary weather occurs and consume when obviously increasing, the reading of reckoning then is lower than actual consumption.

Another kind of technology is to use based on wireless meter reading device.For example, each meter reading device comprises a wireless device (hereinafter to be referred as radio), and this radio can be broadcast to meter reading near receiver.For example, in the Middle East, often use such system, because owner (man) is when staying out, the attendant is denied access to his family usually.Allow the attendant to drive near radio meter reading device based on wireless meter reading device, read instrument with receiver.Adopt this technology, the attendant does not need to enter others' house.An advantage of this system is in the suburb, can reduce the attendant and read the time that instrument spends.

For example, perhaps system needs the attendant physically to drive by the side of or near the collection of meter reading device, so that communicate by letter with these devices.The data of collecting in " driving " are loaded into the centre data collection system subsequently.

Another kind of scheme may comprise a cycle station of collecting wireless data from these devices.This cycle station can also comprise a land-line modulator-demodular unit, calls out via circuit conversion and communicates by letter with the centre data collection system.Such scheme provides configuration service personnel's substitute, yet setting up the telephone line of serving the cycle station may also be expensive.In addition, the circuit conversion calling may also be expensive.

For example, a scheme is to use the GSM modulator-demodular unit to carry out the circuit conversion calling.For the purpose of setting up and controlling, these GSM modulator-demodular units are carried out and known land-line modulator-demodular unit, but such as the similar operation of Hayes compatible modem.In general, this modulator-demodular unit mainly is to serve as a transmission mechanism, is used between two devices, such as Data transmission between a client computer and head end server.Specifically, modulator-demodular unit is configured to modulate passively data or the control signal from client computer, perhaps sends the signal of modulating to client computer through modulator-demodular unit passively.

When a modulator-demodular unit is initialised, this modulator-demodular unit normally, default modem configuration of storing from this modulator-demodular unit brings into operation, and perhaps will receive specific initial configuration parameter from client computer.In any one pattern, initial configuration all is performed guarantees that this modulator-demodular unit can communicate with client computer, and preferably operates (as a transmission) with maximum efficiency.

Figure 16 shows a typical communication network 1600 that adopts radio modem.A portable computer is a client computer 1604.Client computer 1604 for example is connected GSM modulator-demodular unit 1608 by the RS-232 port with serial cable 1606.GSM modulator-demodular unit 1608 connects GSM network 1612 through air interface 1610 again.GSM network 1612 connects a head end server 1616 through SMS service center interface 1614, such as an application server.

Shown in data stream 1650, when client computer 1604 attempted to connect a head end server 1616, it at first came initialization GSM modulator-demodular unit 1608 by configuration parameter directly being sent to GSM modulator-demodular unit 1608.For example, for example, configuration parameter 1620 sends GSM modulator-demodular unit 1608 from client computer 1604 to through serial cable 1606.Then, GSM modulator-demodular unit 1608 send the whether received response 1624 of this parameter of indication to client computer 1604 is counter.In case GSM modulator-demodular unit 1608 is initialised, it becomes the slave unit of client computer 1604 basically, except transmitting the data 1632 to client computer 1604, also as transmitting the data 1628 that carry passively from client computer 1604 head-end servers 1616 from head end server 1616.

Because the U.S. does not carry out control to government utility, and the problems referred to above are worsened more.Have several different electricity providers at present and serve a big city.The piece that so just causes the not adjacency of coverage, thus the attendant must monitor.Suppose that it no longer is possible that all users in the specific geographical area receive electric power from a service supplier.In fact, a block, perhaps each family has different service suppliers.In addition, the consumer can be the thing that bothers very much as the service supplier of conversion easily who is claimed.So, reduced the ability of using measurement expense to slow down of collecting that makes.

The subscriber equipment of other type comprises automatic vending machine, fire alarm detecting device, theft alarm detecting device and detector.In general, these devices need an alarm mechanism to indicate a particular event to be detected.In most of the cases, report to the police only need be audible or visual.Yet, usually need a far end party to intervene to the response of special alert condition.For example, when fire alarm or theft alarm are triggered, need this warning is sent to a central dispatching point, suitable responsible person can be intervened.

The warning system of common employing is the warning system of using on the automatic vending machine.In this warning system, when warning was triggered, a Service lamp on the automatic vending machine was just lighted.A near label the Service lamp of lighting is being write " needing service or repairing please send a telegraph JIM (408) 557-4567 ".

In complex environment more, can use more complicated warning system.For example, some device has utilized an inner microcontroller to come the detection alarm condition and has carried out a response.This response is sent to a bleeding point, gives an outside road communicating line modulator-demodular unit that utilizes himself microcontroller again.The road communicating line modulator-demodular unit is given the dispatching center with this alert notice.An importance of this system is that this warning system is to carry out work under the inner microprocessor of device is controlled and/or triggered.

Summary of the invention

The invention provides a kind of communications bridge that is used for emulation to the circuit conversion call link of subscriber equipment.According to an embodiment, communications bridge is through the data of serial data interface reception from subscriber equipment.Communications bridge emulation turns back to the circuit conversion call link response of subscriber equipment, makes subscriber equipment believe that the circuit conversion call link finishes.In case set up the circuit conversion call link of emulation, communications bridge just is packetized into Short Message Service or general packet radio information on services bag to the data from subscriber equipment, is used for transmitting through NOT-circuit conversion call link.

The invention also discloses a kind of operator of being independent of, transparent radio modem management system.According to an embodiment, the modem management system comprises: receive short message service message at radio modem, and check the short message service message that is used for modem management message.If short message service message comprises modem management message, then radio modem is handled this short message service message.

In another embodiment, the storer of communications bridge comprises a wireless protocols storehouse and a notice algorithm.The alert if trigger notice algorithm that receives on the event detection interface.Notice algorithm process alert if preferably includes and sets up a notification command that is sent to the wireless protocols storehouse.The wireless protocols storehouse also transmits short message service message through the RF transceiver, and this message comprises and the corresponding data of alert if.

Accompanying drawing is briefly described

Fig. 1 shows the physical package of one embodiment of the invention.

Fig. 2 shows the physical package of an alternative embodiment of the present invention.

Fig. 3 is the block scheme of pretreater unit and interface structure.

Fig. 4 is the hardware synoptic diagram of pretreater unit.

Fig. 5 is the memory assignment map of one embodiment of the invention.

Fig. 6 A-Fig. 6 C is the block scheme that comprises the embodiment of the invention of use equipment.

Fig. 7 A-Fig. 7 B shows the constitutional diagram of two interrupt service routines of the present invention.

Fig. 8 is the process flow diagram that shows the major loop of pretreater driver.

Fig. 9-Figure 12 is the process flow diagram that shows the interrupt service routine that is used for the pretreater driver.

Figure 13 A is the block scheme that utilizes a system of the present invention.

Figure 13 B is that the process flow diagram that emulation is set up is called out in the display circuit conversion.

Figure 13 C is that the process flow diagram of emulation unloading is called out in the display circuit conversion.

Figure 14 is the block scheme that utilizes network monitoring system of the present invention.

Figure 15 A-Figure 15 C shows the variety of protocol storehouse that uses in embodiments of the present invention.

Figure 16 shows typical communication network and data stream.

Figure 17 shows according to the communication network of the embodiment of the invention and data stream.

Figure 18 is the process flow diagram that illustrates the step of a Short Message Service modem management processing.

Figure 19 A is the block scheme that is applied to an embodiment of event detection of radio modem and notice.

Figure 19 B shows event detection and the external device (ED) of notifying modulator-demodular unit to be connected.

Figure 20 is the process flow diagram of the master routine of presented event detection and notice.

Figure 21 is the process flow diagram that presented event detected and notified the model notice algorithm of modulator-demodular unit.

The description of preferred embodiment

The invention discloses a kind of method and apparatus of circuit switched data transfer simulation.According to an aspect of the present invention, provide a kind of communications bridge (or interface), data gathering-device of its deception believes that circuit conversion communication is performed.In one embodiment, communication is actually and carries out via GSM Short Message Service (below be called " SMS ").

According to one embodiment of present invention, communications bridge is implemented via the electric hardware and software of particular arrangement.Yet according to another embodiment of the invention, communications bridge is to be added to functional enforcement on the existing GSM modem hardware by the application layer with the gsm protocol storehouse.This two embodiment are described below.

Operational overview

Figure 13 A is to use the block scheme of an embodiment of system 1300 of the present invention.Subscriber equipment 1304 is data gathering-devices, such as the meter reader gathering station that receives from the data of a plurality of government utility instrument.Subscriber equipment 1304 connects (for example, by a serial data interface 1306) data terminal equipment 1308 of serving as communications bridge communicatedly.Data terminal equipment 1308 is configured to communicate through a wave point (or " in the air " interface) 1324 and GSM network 1320, preferably communicates via the standard GSM modulator-demodular unit that is parts of data terminal equipment 1308.For convenience's sake, below the left side of GSM network 1320 is called originator device.Hereinafter the order that will describe preferably comes into effect from the Hayes AT Command Set of a modification.

The right side of the GSM network 1320 that is connected by wave point 1328 is similar data terminal equipment 1312, and it also connects (for example, passing through serial data interface) subscriber equipment 1316 communicatedly.Subscriber equipment 1316 can comprise analyze or relaying from one second data collection station or other device of the communication of originator device.For simplicity, the right side with GSM network 1320 is referred to as receiver device.It should be noted that receiver device does not need to monitor originator device, for example, receiver device need not connect GSM network 1320 via wave point 1328, but can connect via the physical network circuit.

Figure 13 B-Figure 13 C shows and is used for call setup and the calling unloading agreement that circuit conversion is called out emulation.According to an embodiment, originating subscriber equipment 1304 and receiver subscriber equipment 1316 all will not known to have carried out a NOT-circuit conversion and will be called out.The response that data terminal equipment 1308 and 1312 emulation are called out the circuit conversion of subscriber equipment, thereby the fact that the exchange of generation NOT-circuit conversion is carried out pellucidly.

At first turn back to Figure 13 B, it and Figure 13 A cooperation show by the process flow diagram of the circuit conversion call setup of emulation.ATD order 1332 begins to send from subscriber equipment 1304, is delivered to data terminal equipment 1308 continuously through serial data interface 1306.Communications bridge is handled the ATD order 1332 of input, and SMS is set up chain circuit message 1336 sends to radio.According to an embodiment, data terminal equipment and subscriber equipment are handled flow control through consultation, overflow the data that are delivered to data terminal equipment 1308 from subscriber equipment 1304 to avoid input buffer.

Radio is set up chain circuit message 1336 through wave point 1324 with SMS and is sent to GSM network 1320.GSM network 1320 is set up chain circuit message 1336 with SMS and is sent receiver wireless local loop 1328 to.On receiver wireless local loop 1328, SMS to be set up chain circuit message 1336 send data terminal equipment 1312 to, its radio reception message of data terminal equipment 1312 usefulness is handled this message with its communications bridge then.Communications bridge is checked this message and with 1316 incoming calls of ringing indicator 1340 notifying user equipment.

The communications bridge of data terminal equipment 1308 preferably keeps telephone number to continue 5 minutes.Can give with time enough like this and receive the affirmation that the SMS from subscriber equipment 1316 sets up chain circuit message 1336.

According to an embodiment, AT order " ATA " (being shown as ata command 1344) is sent to data terminal equipment 1312 from subscriber equipment 1316.Data terminal equipment 1312 sends to data terminal equipment 1308 with SMS link establishment message 1348 subsequently.In case be subjected to SMS link establishment message 1348, the communications bridge of data terminal equipment 1308 just sends a connection message 1352 to subscriber equipment 1304.

It should be noted that, if before receiving an ata command 1344 from subscriber equipment 1316, data terminal equipment 1312 receives more than one SMS from GSM network 1320 and sets up chain circuit message 1336, and then the up-to-date SMS of the communications bridge of data terminal equipment 1312 response sets up chain circuit message 1336.

In case the SMS link is established, data terminal equipment 1308 and 1312 just can be by the Short Message Service Data transmission between subscriber equipment 1304 and subscriber equipment 1316 that transmits on the wireless local loop.

By the virtual link between originator device and the receiver device, data can be transmitted, and just look like that a regular circuit conversion calling is carried out.When the data terminal equipment communications bridge was handled required all packets, handing-over, ordering and the error correction of special applications of using equipment, operation was transparent to subscriber equipment.

Turn back to Figure 13 C now, it also matches with Figure 13 A.Figure 13 C shows the process flow diagram of a call link unloading 1350 of the circuit conversion calling that is used for emulation.According to an embodiment, the communications bridge in the data terminal equipment 1308 is waited for from the data of subscriber equipment 1316 or was ordered about 10 minutes.If in such time frame, do not receive data or order, think that then this calling " abandons ".Yet, receive one and overflow sequence and also can cause to call out and be dropped.

At first, overflowing sequence 1356 is received by data terminal equipment 1308.Then, the radio in the data terminal equipment 1308 sends SMS disconnecting link message 1360 through wave point 1324.

GSM network 1320 receives the SMS disconnecting link message 1360 that is sent, and sends data terminal equipment 1312 to through wave point 1328.Data terminal equipment 1312 receives SMS disconnecting link message 1360, is handled by communications bridge then.Communications bridge sends to subscriber equipment 1364 disconnecting sign 1364 again, then link is disconnected message 1368 and turns back to data terminal equipment 1308.When data terminal equipment 1308 received link disconnection message 1368, radio abandoned this link.

Although above describe in conjunction with SMS embodiment, according to another embodiment, communications bridge is called out via the conversion of general packet radio service (" GPRS ") artificial circuit.Call setup is similar to the method for above-mentioned (following) basically with unloading, yet, not to supply a telephone number afterwards in AT order " ATD ", but supply Internet protocol address (for example, " ATD114.32.0.108 ").Connect one and set up, just format makes it similar in appearance to the packet through SMS through the packet that GPRS transmits.

Another difference of SMS and GPRS is, the GPRS grouping can have 1500K byte packet length, rather than has 140 byte packet length and less than the baud rate (SMS) of 300 bauds, in addition, higher aerial speed, the 170K baud also is possible.Add bigger packet and increase bandwidth allow easily that additional function is integrated in communications bridge, such as, undemanding flow control, improve the signal handing-over of service quality, many bit encryption and (for example, the parity checking of other Error Recovery, CRC, etc.).Although these features may be in SMS embodiment, small-scale block length (size) may need the packet sequencing that sends with each grouping number and other header information, the communication of will further slowing down like this.

An example realizing the system of above-mentioned ordinary construction is the family expenses automated application that personal computer (subscriber equipment 1304) is gone up operation, and this personal computer connects data terminal equipment 1308 through interface 1306.The end opposite of home applications program is contained in the home network control center that is provided in subscriber equipment 1316.The home applications program provides monitoring and control service to the home network control system, and home network control center then controls, for example, and heating, ventilation, air-conditioning and use the corpse household safe.Commercial available family expenses control system comprises the LONWORKS of Echelon company ^TMTechnology.

Another example of implementing the system of the general structure shown in Figure 13 A is an automatic meter reading system.In a such system, subscriber equipment 1304 is automatic meter reading device gathering stations, the measurement that it can consume for the commodity such as electric power or rock gas that one or more automatic meter reading devices receptions are measured.The measured data of automatic meter reading device are sent to gathering station, and this gathering station is given data terminal equipment 1308 with this feeds of data again.Subscriber equipment 1316 can be a common device, and its is through data terminal equipment 1312 poll gathering station on one's own initiative, perhaps receives measured data from data collection station passively through data terminal equipment 1312.

Physical package

Fig. 1 shows the skeleton view of an embodiment of the physical package of data terminal module (" DTM ") 100.Data terminal module 100 comprises a packaging part 104 that surrounds data terminal assembly (" DTSA ").Data terminal assembly (not shown) is a circuit card, is configured to accept a pretreater and a radio (below will be elaborated).

Coaxial cable connector 108, standard DB-9 connector 112, power connector 116 and power indicator 120 are displayed on the packaging part 104.The inner data terminal assembly that connects of they each.Concentric cable 108 is configured to accept a wireless antenna.Have the fluting of two mounting sleeves 106 on the packaging part 104.Mounting sleeve 106 is used for guaranteeing that for connector provides a passage data terminal module 100 enters a desired location.

Fig. 2 shows the skeleton view of an embodiment of the physical package of data terminal unit (" DTU ") 200.Data terminal unit 200 comprises two-layer shell.Housing 204 loads electronic module, such as data terminal assembly 228 and power supply 232.Heat radiator 224 is placed in the corner of each side of housing 204, and the heat that generates of the electronic module that is used for dissipating.The outside surface of housing 204 comprises a coaxial socket 240 and an A/C power card 244.Also have two hinged breech locks 216 on the outside surface of housing 204.

The second portion of the encapsulation of data terminal unit 200 is to cover 208.Lid 208 connects housings 204 through hinge 248, and is configured to the electronic module that loads on the casing 204 hermetically.Breech lock connector 212 is accepted hinged breech lock 216, to be connected.Lid 208 and housing 204 also comprise some connector plug jacks 220 that are used for supplementary protection.Chip aerial 236 is installed to this on 208.Chip aerial 236 is linked on the radio that is arranged in the data terminal sub-component 228.

The embodiment of chip aerial 236 and encapsulation is disclosed in name and is called " CAPACITIVESIGNAL COUPLING DEVICE ", sequence number is 09/316,457 U.S. Patent application and name are called " RADIATING ENCLOSURE ", sequence number is 09/316, in 459 the U.S. Patent application, these two patented claims are all submitted on May 21st, 1999.

According to an alternative embodiment, in data terminal module 100 or data terminal unit 200, do not adopt special electric hardware, in a such embodiment, application software is added on the standard GSM modulation and demodulation software storehouse.So data terminal equipment can be the GSM modulator-demodular unit of a particular arrangement.Yet, can adopt the electronics and/or the storer of particular arrangement in another embodiment.Introduce such embodiment now.

Pretreater embodiment

Fig. 3 is a block scheme of pretreater structure.Pretreater 300 connects one first interface 328, second interface 336 and one the 3rd interface 332 respectively.Each interface preferably includes a RS-232 port, the physical connector that has DB-9 or be equal to.For example, can realize COMA 304, COMR 308 and DEBUG312 with such connector.Order wire 316,320 and 324 is linked to pretreater 300 communicatedly with physical connector.

According to an embodiment, first interface, 328 connection subscriber equipmenies (for example, remote control equipment, automatic meter reading equipment, the meter reader centrostigma, the government utility blind controller system, branch office's watch-dog, etc.).Subscriber equipment is configured to the measured data of collection monitoring external activity.Second interface 336 be one to wireless physical connection, GSM modulator-demodular unit particularly, it has approximate 9600bps or higher baud rate.The 3rd interface 332 is the serial line interface of an opening preferably, and it can accept a terminal that is used for the inspection machine of debug and configuration purpose.According to an embodiment, the debug port traffic can physically be visited through first interface 328.

The order wire 316,320 that each RS-232 connector 304,308 and 312 is shown as by uniqueness is connected pretreater 300 with 324.For for simplicity, unique circuit is represented the address of a uniqueness of each communication port or serial line interface, and in fact, individual address and data bus can be supported this communication port.

Fig. 4 is the hardware synoptic diagram of an embodiment of pretreater 300.Pretreater 300 comprises: a microprocessor 404, preferably the element number DS80C323 of Dallas Semiconductor (16MHz); A Universal Asynchronous Receiver Transmitter (" UART ") 416, preferably the element number ST16C2450 of an Exar company (8MHz); A nonvolatile memory 424, preferably the element number 29LV001B-70JC of Advanced Micro Devices; With a volatile memory 428, preferably the element number 71V256SA-12PZ of IDT.Need an additional steering logic 420, such as, gate matrix and TTL logic are used to keep regularly (for example, the Clock dividers of UART 416), buffering and logic level.Power circuit 412 is to pretreater 300 and any peripheral unit (for example, a radio) power supply, and crystal oscillator 408 (16MHz) provides a clock signal.Main bus 432 connects microprocessors 404, with storer 424 and 428 and steering logic 420.Main bus 432 comprises data, address and control line 436, such as, the same control line of interconnection clock 408, UART 416 and microcontroller 404.

Additional circuit 440,444 and 448 is shown as and is connected UART 416.These circuits are used for first interface 328, second interface 336 and the 3rd interface 332.Interruption is received by UART416 via line 440,444 and 448, and it triggers the exception/interrupt algorithm in the microcontroller 404.The part of volatile memory 428 is used as that each input queue is sent to 1024 bytes store impact dampers (like this, if use two interfaces, then making memory-aided 2048 bytes) among the UART 416.

Fig. 5 shows the 65K bytes of memory device distribution diagram of address space.Low level 49kB address space 504 is used for nonvolatile memory 424, the address space 512 that following 12kB address space 508 is used for volatile memory 428 ensuing 8 bytes is used for first interface 328, ensuing again is the 2kB address space 516 of reserve storage, 8 byte address spaces 520 of second interface 336 and another 2kB address space 524 of reserve storage.

Fig. 6 A-Fig. 6 C shows the of the present invention various physical embodiments that connect subscriber equipment (for example, data collection module 608).Fig. 6 A shows unique user equipment 600, comprising: a data collector unit 608 (for example, an automatic meter reading device), a pretreater 604 and a radio 612.Pretreater 604 connects data collection module 608 through first interface 616, and connects radio 612 through second interface 620.

Fig. 6 B shows the subscriber equipment 624 that comprises pretreater 604.Here, radio 612 is in the physical package 628 separately.Here, second interface comprises I/O interface 652 and 656 (for example, RS-232 port).I/O interface 652 with 656 through a serial cable 644 be connected, I/O interface 656 connects pretreaters 604 through connector 640, I/O interface 652 connects radio through connector 648.

Fig. 6 C shows a subscriber equipment 632, the system similarity shown in it and Fig. 6 A and Fig. 6 B, however pretreater 604 and radio 612 are set up (being present in) in data terminal unit/module 636.Fig. 6 C shows the described identical interface in conjunction with Fig. 6 C, and second interface 620.Yet, in Fig. 6 C, be present in parts in second interface 620 and be replaced by and be arranged in first interface 616.Data terminal module 100 that Fig. 6 C extraordinary image Fig. 1 and Fig. 2 illustrate respectively and data terminal unit 200.

Introduce a work overview of these technology now.In general, pretreater 604 is hardware componenies of software driver.As mentioned above, pretreater 604 can have the specialized hardware of an operating software driver, yet, also software driver can be overlapped onto in the existing hardware, as an optional feature of software stack.For example, the pretreater driver is a drives interrupts service routine normally, and it at first identifies the source of an interruption, determines that then how processing or interrupt service routine are according to following any one data (perhaps, interruption itself) of this interruption to move.

It should be noted that preferably ascii character data of input traffic.Identify specific function described here although can increase some additional special codes, order best based on known Hayes modulator-demodular unit AT Command Set.Below in conjunction with Fig. 2 the code that some are such is described.

According to an embodiment, the fundamental component of pretreater is stored in the nonvolatile memory 424 (for example, the part 504 of storage map 500), and is moved according to a sequence of the instruction of a computer-readable format storage by microprocessor 404.For example, instruction sequence (for example, the op code) data in nonvolatile memory 424 is loaded into microprocessor 404 and the control register (as selection, before operation, instruction can copy to the volatile memory from nonvolatile memory 424) this instruction sequence microprocessor 404 of making pretreater 300 carries out a series of actions according to the instruction sequence and the combination of the data that receive from serial data interface (for example, UART 416).The program variable that the pretreater driver is required or be stored in the volatile register of microprocessor 404 inside perhaps is stored in the volatile memory 428.

Below in conjunction with two constitutional diagrams of Fig. 7 A-Fig. 7 B explanation.This explanation is a principle, and further obtains the following support in conjunction with the described particular flow sheet of Fig. 8-Figure 12.

The constitutional diagram 700 of the first interface interrupt service routine is displayed among Fig. 7 A.Default conditions are IDLE mode 7s 04.In IDLE mode 7 04, character receives through first interface 616, and order or incident to triggering a state variation, for example, and link command 716 and 728 these characters of check.If order or incident that indicating status changes do not detect, then this data character is stored in the storage buffer, take place until a state variation.

Except monitoring the order or the incident (for example, overflows sequence) that can trigger another state variation, circuit (" CKT ") mode 7 12 is a bit intervened by pretreater 604, and data are sent to second interface 620 from first interface 616.In circuit-mode 712, effectively virtual link is maintained between radio 612 and the public switched telephone network (PSTN) through a wireless local loop.Detect overflow sequence before, circuit-mode 712 will be held.Yet if detect an order 732 of input once more after overflowing sequence 720, interrupt service routine will turn back to circuit-mode 712, rather than turn back to IDLE mode 7 04.

Short Message Service (" SMS ") pattern is prepared SMS message, and by radio 612, sends the SMS message through second interface 620, and this SMS message comprises the data in the storage buffer of being stored in from first interface 616.SMS message from radio 612 transmits on the GSM network, and other insertion network is sent to their final destination then.

SMS message has one 140 byte data structure usually.SMS type of message of first byte indication, second byte indication SMS message-length, last 138 bytes comprise the SMS imformosome.The SMS imformosome comprises character data or order, perhaps character data and order.The SMS type of message is disclosed in the table 1.

Table 1 is set up link request and is set up a virtual link link that is used for the SMS data transfer and set up and reply connecting of chain circuit message, indicates this link to be established

(transmission of this message or reception make this pattern change to the SMS pattern) data link uses this type of message to transmit all data disconnecting link requests disconnections link (transmission of this message or a reception

Making this pattern change to the IDLE pattern) of having disconnected disconnecting link message of link replys

One overflows sequence 724 and makes state turn back to IDLE mode 7 04 from SMS mode 7 08.

Constitutional diagram 750 shown in Fig. 7 B has shown and the second interface interrupt service routine associated state, above in conjunction with the described state of the first interface break in service algorithm basically similar in appearance to the related algorithm of the second interface break in service algorithm, its main difference is, if receive an interruption through second interface, then this interruption from subscriber equipment (for example is not, but the remote equipment outside the radio 612 data aggregation 608).

In IDLE mode 7 54, (for example, the data character that COMR) receives directly transmits through first interface 616 (for example, COMA 304) at second interface 620.Yet the monitoring data character is used for link command 758 or 762, and these two link command indicating status respectively are converted to SMS mode 7 66 or are converted to CKT mode 7 70. Overflow sequence 774 and 778 service routine is turned back to IDLE mode 7 54 from CKT mode 7 70 or SMS mode 7 66.

Fig. 8 shows the major loop 800 of pretreater.At first, by the various operating parameters of initialization, major loop 800 is started.For example, in step 804, initialization WatchDog Timer, second timer, serial port and UART 416.

WatchDog Timer is designed to the pretreater 604 that resets in software stops or handling incident that mistake occurs.Preferably, the duration of WatchDog Timer is set to 4.5 seconds.Second timer is used for to expanding for 4.5 second pause times than longer program of the first WatchDog Timer time spent.Second timer generates 2 milliseconds of interruptions.

Serial port (for example, COMA 304 and COMR 308) is initialised, and makes it to stop bit and do not have operating under the condition of odd-even check at 9600 bauds, 8 bits, 1, and begins to set up UART 416, makes it to move by 9600 bauds.Each of storage buffer input queue has 1024 bytes, and storage is through the data character of COMR 308 and COMA 304 receptions.

Then, in step 808, the pattern of major loop is set to IDLE (for example, being used for first interface 616 and second interface 620).After the step 808, interrupt service routine is handled and is started.

In step 812, if an interruption is received on first interface 616, an exception occurs so, and handles the first interface interrupt service routine that proceeds in the step 816, and this program is illustrated and will illustrates hereinafter in conjunction with Fig. 9 in conjunction with Fig. 7 A in the above.

In step 820, if an interruption receives on second interface 620, then an exception occurs, and handles the second interface interrupt service routine that proceeds in the step 824, during this program has been illustrated in conjunction with Fig. 7 B and will have illustrated hereinafter in conjunction with Figure 10.

In step 828, carry out a check.To determine when the first interface interrupt service routine is in SMS mode 7 08, whether expiring the working time when receiving through first interface 616 (for example, through COMA 304) from last data character.This check is known as SMS timer expiration incident.If the SMS timer event takes place, then in step 832, make storage buffer prepare SMS and transmit, transmit the SMS message and the SMS timer that resets.Processing proceeds to step 836.

In step 836,, then carry out below in conjunction with the described debug interrupt service routine of Figure 11 in step 840 if (for example, debug interface 312 shown in Figure 3) received in an interruption at the 3rd interface.

In step 844, carry out a check, whether be updated with the value (taking from radio 612) of determining a modulator-demodular unit operating state register or a line status register by UART 416.If any one is updated, then to handle and proceed to step 848, this step 848 describes below in conjunction with Figure 12.After this, as selection, step 844 or 848 is handled and is proceeded to step 852, at this loop is resumed at step 812.

Fig. 9 is the process flow diagram that illustrates the action of the pre-service driver execution when first interface 616 is served and interrupted.Specifically, this flowchart illustrations has illustrated the first interface interrupt service routine 900, and it serves the interruption from subscriber equipment (for example, data aggregation 608).

In step 904, carry out a check, to determine whether present pattern is CKT mode 7 12, if pattern is a CKT mode 7 12, then the data that first interface 616 received in step 908 are passed through second interface 620.

In step 912, carry out a check, to determine whether that receiving one overflows sequence.Specifically, this check determines whether to receive character string " +++" through first interface 616.Do not overflow sequence if receive this, then in step 916, reset and overflow sequence counter.Yet, overflow sequence if receive this, pattern is set to IDLE mode 7 04 in step 920.Subsequently, the pretreater driver turns back to major loop, i.e. step 820.

In step 924, carry out a check, to determine whether present pattern is IDLE mode 7 04.If present pattern is an IDLE mode 7 04, then the Input Data word symbol from first interface 616 is added on the storage buffer, then, in step 932, carry out a check, trigger (for example, carriage return to determine to handle for one, CTRL-Z, perhaps storage buffer is full of) whether take place.Take place if handle to trigger, then in step 936, analyze, explain this storage buffer, and carry out suitable action.A tabulation and their result of the character string of exemplary explanation are displayed in the table 2.

Table 2AT-EMU set nonvolatile memory is with reflection simulation model-0

Indication does not have emulation, and the circuit conversion ATDnnnnnnn of 1 indication institute emulation sends one to telephone number nnnnnnn and sets up link SMS message

(when AT～EMU is set to 1) ATH sends a disconnection to the telephone number that uses the ATD order to set up

Link SMS message (when AT～EMU is set to 1) ATS7? if the carrier sense signal that the value of making 30 turns back on the first interface 616AT0 radio 612 is still kept,

Then turn back to CKT Mode A T+IPR=xxx with on the radio 612 and 604 two ports of pretreater on

Does baud rate change to xxxx (2400,9600) AT? show this table to the debug port

It should be noted that AT～EMU command set is provided for the simulation model of unit.This is important, because this unit can provide two real circuit conversion to call out or called out by the conversion of emulation.Therefore, if pattern is set to not emulation, then ATD and ATH order will be operated according to a real circuits conversion call establishment/control function.Yet, when pattern is set to the artificial circuit translative mode, this function be unique-as mentioned above.

After step 936, the pretreater driver turns back to step 820.

In step 940, carry out a check, to determine whether present pattern is SMS mode 7 08.If pattern is a SMS mode 7 08 at present, then the SMS timer is resetted in step 944.In step 948, carry out another check, to determine in the storage buffer whether enough space storing additional data being arranged.If there are not enough spaces, then SMS message is resetted in step 952, thus the part of refresh memory impact damper.Yet, if enough spaces are arranged in the storage buffer, in step 956, handle any one and overflow character, for example the character string that occurs through COMA 304 " +++", perhaps the disconnecting link SMS message that receives through COMR308.Handle this and overflow after the character, the pretreater driver turns back to step 820.

Figure 10 is when showing through 620 interruption of operation (that is, the second interface interrupt service routine 1000) of second interface, by the process flow diagram of the action of pretreater driver execution.

In step 1004, carry out a check, to determine whether present pattern is CKT mode 7 70.If pattern is a CKT mode 7 70 at present, then in step 1008, second interface 620 (for example COMR 308) is gone up any data character that receives and is sent to first interface 616 (for example, COMA 304) through pretreater 604.Then,, carry out a check, to determine whether receiving that overflows a sequence in step 1012.According to an embodiment, overflowing sequence is the reception of three continuous plus signs, or character string " +++".If do not find to overflow sequence, then in step 1016, reset and overflow counter.Yet,, in step 1020, mode adjustment is arrived IDLE mode 7 54 if find to overflow sequence.After step 1016 or 1020, the pre-service driver proceeds to step 828.

In step 1024, carry out a check, to determine whether present pattern is IDLE mode 7 54.If pattern is an IDLE mode 7 54 at present, then in step 1028, the data character that receives on second interface 620 is sent to first interface 616.In step 1032, carry out a check, to determine whether in data character, a finding link sequences.According to an embodiment, link sequences is character string "+CMTI: ", an input of its indication SMS message.If do not detect this link sequences, then reset and overflow counter in step 1036.Yet,, read Incoming SMS message in step 1040 if detect link sequences.

Then, in step 1044, carry out second check, to determine whether that (for example, in SMS message-type field) finds another link sequences in SMS message.For example, next link sequences can be top associative list 1 described " setting up link " or " link establishment " message.If do not find to set up link or link establishment message, then the residue of SMS message exported to first interface 616 in step 1048.Yet if found to set up link or link establishment message, this message of processing and pattern are set to mode 7 66 in step 1052.Then, the pre-service driver proceeds to step 828.

In step 1056, carry out a check, to determine whether present type order premode is SMS mode 7 66.If pattern is a SMS mode 7 66 at present, then in step 1060, carry out a check, trigger to determine whether to receive to analyze for one.According to an embodiment, analyze triggering and comprise line feed or carriage return, and " impact damper is full of " sign.Do not trigger if receive to analyze, then data character is stored in the storage buffer, handle proceeding to step 828 then in step 1064.Yet, analyze triggering if receive one, in step 1068, analyze SMS message.

In step 1072, carry out a check, to determine whether the SMS type of message is disconnecting link.If the SMS type of message is not a disconnecting link, then the SMS type of message is sent to first interface 616 in step 1076.Yet if SMS message is the disconnecting link order, pattern is set to IDLE mode 7 54 in step 1080.After step 1080, the pre-service driver proceeds to step 828.

Figure 11 is the process flow diagram that shows debug interrupt service routine 1100.Under normal circumstances, Fig. 3 and the 3rd interface shown in Figure 4 receive the debug interruption.Debug is interrupted being related to usually end device or pocket computer are connected to the 3rd interface 332.Debug interrupt service routine 1100 is used to the purpose setting up and diagnose.

In step 1104, on the impact damper that will add to storage through the data character that the 3rd interface 332 receives.In step 1108, check this data character, to determine if it is a carriage return.If data character is not a carriage return, then program turns back to step 844.If data character is a carriage return, then program turns back to step 844.If data character is a carriage return, then at step 1112 analyzing stored device impact damper.In step 1116, carry out a check, to determine from an order of storage buffer whether in a command set tabulation (for example, table 2).If should order not in command list (CLIST),, then in step 1120, through error message of the 3rd interface 332 reports.Yet, if order is in this command list (CLIST), in this order of step 1124 operation.After this, processing proceeds to step 844.

Figure 12 shows and handles first interface 616 and the modem state register (" MSR ") of second interface, 620 collections and the process flow diagram 1200 of line status register (" LSR ") value.Basically be, analyze the possible mistake of a sequence, and take suitable action, comprise changing the pretreater pattern in some cases.

In step 1204, carry out a check, to determine whether on second interface 620 (for example, radio 612), whether having kept carrier wave detection (" CD ").Detect if kept this carrier wave, then on first interface 616, keep this carrier wave detection and pattern and be set to circuit-mode (step 1208).

In step 1212, carry out a check, to determine whether that abandoning this carrier wave at second interface 620 detects,, this carrier wave is dropped if detecting, and then in step 1216, abandon this carrier wave at first interface 616 and detect, and pattern is set to idle pulley.

In step 1220, carry out a detection, to determine whether keeping a ring sign (" RI "),, then this ring sign is maintained on first interface 616 in step 1224 if this ring sign is kept at second interface 620.

In step 1228, carry out a detection, whether on second interface 620, abandon to determine that this ring detects.If this ring sign is dropped, then makes second interface 616 also abandon this ring and detect in step 1232.

In step 1236, carry out a check, to determine whether on second interface 620, keeping clear to send (" CTS ").If clear to send is kept, then at step 1240 intiating radio electricity 612.After step 1236 or 1240, pretreater turns back to step 852.

The service routine that embodies in the flow process 1200 is useful to following situation: service routine can respond the certain physical condition, promptly, be used for finishing the keeping or abandoning an of circuit of virtual circuit, on first interface 616 or second interface 620, change the pattern of pretreater 604.

Application layer embodiment

According to another embodiment, the simulation hardware of specific purpose (for example, shown in Figure 3 pretreater 300) does not combine with existing GSM modulator-demodular unit behaviour.But, by joining the software on the standard gsm protocol storehouse 1500 shown in Figure 15 A, realize above-mentioned function.This identical software can be added to general packet radio service (GPRS) protocol stack 1580 (GPRS Class C) shown in Figure 15 B and Figure 15 C and 1590 (GPRS Class A) respectively.Identical reference marker refers to components identical in Figure 15 A-Figure 15 C.

According to an embodiment of the present invention, pass through the gsm protocol storehouse in conjunction with described call setup of Figure 13 A-Figure 13 C and offloading functions, for example, the application layer of existing gsm protocol storehouse in the GSM pattern is carried out.

In such an embodiment, editor's computer readable program code and being loaded in the non-volatile storage media.Then, come to move this code by one or more configurations by the input AT process of commands device that the SMS packet format is handled from subscriber equipment or wireless input end.The function communications bridge that conversion is called out to the subscriber equipment artificial circuit has been set up in the application layer expansion.The advantage of this application layer embodiment is the hardware that does not need special/single goal.On the contrary, by this software is added the gsm protocol storehouse, this function is added on the existing GSM modulator-demodular unit.

Figure 15 A shows gsm protocol storehouse 1500.In general gsm protocol storehouse 1500 bases are known technologies.For example, the basic software composition of gsm protocol storehouse 1500 can have been bought from different sale merchants, such as, can where buy from CONDAT Datensystem Gmblt and other the radio communication sale merchant of the debisSystemhaus of Berlin, Germany, German Hannover.According to an embodiment, gsm protocol storehouse 1500 can be implemented at different logical units or in the computer-readable code that GSM modulator-demodular unit flush bonding processor part is moved.

The present invention can implement in the software code that comprises AT command interface 1504.The AT command interface is added on each of different gsm protocol storehouse 1500,1580 and 1590.Like this, associative list 2 described orders be bridged to subscriber equipment 1304 and gsm protocol storehouse-and, thereby be between the GSM network 1320 (Figure 13).It should be noted that AT command interface 1504 can also comprise event detection and notice software, their detect from the warning of subscriber equipment and suitably handle they-for example, the circuit conversion of initialization emulation or circuit conversion are called out.Some exemplary AT orders are displayed in the table 3.

Table 3+++AT～LOGON=[password] user is signed in on the radio modem,

And allowing other mobile management function of operation +++AT～LOGOFF nullifies a user from radio modem,

Perhaps forbid the mobile management function +++AT～PWD=[password] change existing password +++AT[order] the mobile management command identifier

Referring to Figure 15 A, subscriber equipment 1304 uses Hayes standard AT command interface 1504 to send data through GSM network 1320.Mobile network's man-machine interface (MN) 1512 receives these data, and this data biography is converted to suitable messaging service---Short Message Service (SMS) 1516, calls out control professional (CC) 1502, perhaps supplementary service (SS) 1524.Registration parts 1508 will provide to mobile management layer 1528 necessary information about data and network will be provided.Data stream is sent to mobile management layer (MM) and is sent to layer 1508,1516,1520 and 1524 from mobile management layer (MM) 1528 from layer 1508,1516,1520 and 1524.

Mobile management layer 1528 is set up, management and discharge being connected between subscriber equipment 1304 and the GSM network 1320.Data and control are sent to radio resource (RR) 1532 from mobile management layer 1528.Radio resource 1532 is set up through wave point and is used for the physical connection of call signaling, and sets up Traffic Channel between subscriber equipment 1304 and base station 1488 (Figure 14).

Connection to radio resource 1532 is a physical (L1) 1540.Physical layer 1540 is handled call signaling and the Traffic Channel of byte from radio resource layer 1532, and handles the data that send from data link layer (L2) 1536.

Figure 15 B is similar to Figure 15 A substantially, yet the layer of " G " symbol indication appointment in the protocol stack relates to GPRS (GPRS) now.GPRS utilizes the packet radio principle, and can be used for carrying packet data protocol between subscriber equipment 1304 and GSM network 1320.GPRS also provides supplementary service except the business that the standard gsm network is provided, for example, GPRS can provide the aerial message data rate and the block length of raising.

Application programming interfaces (API) 1544 are increased and allow application program control sub-network to rely on convergence protocol (SNDCP) 1548, this agreement be responsible for the segmentation of packet and re-assembly, encryption and decryption and transmission control protocol (TCP) head and data compression.

The layer that connects AT command interface 1504 comprises registration layer 1508, man-machine interface layer 1512, and these two layers connect SM layer 1552 and GSMS (GPRS SMS (Short Message Service)) 1556 again respectively.SM layer 1552 is connected GPRS mobile management (GMM) layer 1560 with GSMS layer 1556, GMM is connected link layer control (LLC) 1564 with SNDCP layer 1548, and the link layer information of integrated data is handled in this link layer control 1564.

Link layer control 1546 connects GPRS resource management layer (GRR) 1568.GPRS resource management layer 1568 connects medium access control/Radio Link control (RLC/MAC) layer 1572 and Physical layer 1540 again, and layer 1572 is handled the physics link processing.

Figure 15 C shows GPRS Class A protocol stack 1590.Protocol stack 1590 is consolidation procedures of gsm protocol storehouse 1500 (Figure 15 A) and GPRS Class C protocol stack 1580 (Figure 15 B), is represented by the dual reference number of each layer of note protocol stack.GPRS Class A protocol stack is operation standard GPRS and other gsm service simultaneously.

Data gathering system

Figure 14 shows the replaceable system 1400 of the present invention that utilizes.Subscriber equipment 1404 comprises an application program, for example, and remote measurement, automatic meter reading, instrument bleeding point, government utility blind controller system, substation monitoring, home network control system or other application.Specifically, the present invention can use in conjunction with an event detection and notification application, such as being used for fire alarm, theft alarm, automatic vending machine, perhaps indicates other situation of the state change of subscriber equipment 1404, perhaps connected some other device.

A RS-232 interface 1448 with hardware flow control connects data terminal module 100 with subscriber equipment 1404, perhaps replacedly connects data terminal unit 200.Data terminal module 100 and data terminal unit 200 preferably include a debug port, can dock and carry out installation or check service with Software tool 1484 through this port terminal equipment or a pocket computer 1412.Debug and configuration service can be optionally accessed through first interface 616.

Data terminal module 100 and data terminal unit 200 are received one or more antenna repeaters 1408 through a radio company.Radio is a GSM type modulator-demodular unit preferably.Radio is configured to send and receive information between described data terminal module 100 or data terminal and GSM network 1488.

At least one or a plurality of antenna repeater 1408 connect base station transceiver station (" BTS ") 1416.Base station transceiver station 1416 is handled Incoming wireless data (for example, forming the packet of Incoming wireless signal) and is sent these data to base station controller (" BSC ") 1420 through T1 line (or other dedicated line).Base station controller 1420 checkings are used for the business of data terminal unit/module, and send the Incoming wireless data of handling to mobile switching centre (" MSC ") 1424 through T1 line 1456.Mobile switching centre 1424 sends the Incoming wireless data of handling to a suitable network station through a dedicated line 1456, an interworking function (" IWF ") 1432 for example, such as, PSTN bridge/the router of (by mark " 1 " sign) under Circuit-Switched Data path situation, perhaps a SMS service center (" SMSC ") 1428 of (by mark " 2 " sign) under the Short Message Service data routing situation.

If data routing is a Circuit-Switched Data path, then the wireless data of Chu Liing is delivered to Circuit-Switched Data interface 1436 from interworking function 1432 through PSTN (" PSTN ") 1436.Yet if data routing is the Short Message Service data routing, SMS service center 1428 can connect 1460 through PSTN with processed wireless data and send interface 1436 to, perhaps is connected to internet 1440 through packet switching network 1456.Under the situation that transmits through internet 1440, SMS service center 1428 is handled all internet protocol packets according to known internet protocol standard such as the internet RFC 791 (quoting as a reference at this) that can openly obtain.

User's application server 1444 connects 1468 from PSTN interface 1436 retrieval Incoming wireless datas through modulator-demodular unit.As selection, an internet access/reception supply 1476 retrieval Incoming wireless datas of user's application server 1444 through connecting internet 1440.

Optional terminal management software 1480 can be used by user's application server 1444, with the service that provides office data, order or set up from user's application server 1444 to subscriber equipment 1404 (through data terminal module 100 or data terminal units 200) in above-mentioned reverse path.

The operator is independent, transparent radio modem administrative skill

The present invention also comprises the method and the technology of independent, the transparent radio modem management of the operator who uses Short Message Service.This method and technology are implemented in a radio modem, although the aspect of this technology can be implemented in a far-end (or " initiating terminal ") server.This technology preferably allows radio modem not only as before as slave unit, but also as an Intelligent treatment device.

In addition, radio modem is configured to allow to be configured through short message service message the long-range initialization of parameter.Short message service message can comprise such data, and it is intiating radio modem operation parameter not only, but also is invoked at inside or externally moves the order or the application program of radio modem.For example, this method and technology allow the internal event detection and the notice algorithm of radio modem are carried out long-range initialization.In another example, this method and technology allow an interior arrangement of radio modem is carried out long-range initialization or control, for example a government utility instrument, an automatic vending machine or other subscriber equipment are carried out long-range initialization or control.

Figure 17 shows a demonstration network 1700 that uses this technology.Subscriber equipment 1720 is connected to a radio modem 1704 through serial cable or other circuit 1706 (below be called " circuit 1706 "), the preferably global system of mobile communication (below be called " GSM ") or GPRS of this radio modem (below be called " GPRS ")-type modulator-demodular unit.Although subscriber equipment 1720 is illustrated as a portable computer, but it can be a form uncomplicated or subscriber equipment that function is more limited, such as, government utility instrument, instrument centrostigma, government utility control system, substation monitor, telemetry equipment or automatic vending machine.

Radio modem 1704 connects a wireless network 1612 through an air interface 1610, for example, and GSM or GPRS network.Wireless network 1612 also connects head end server 1616 through a SMS service center interface 1614.Head end server 1716 is different from head end server 1616, and it is configured to send SMS message to radio modem 1708, and SMS message comprises radio modem management information.Head end server 1716 is not needed specific programming, only need to revise (will be appreciated that in the explanation of associative list 1 below) because comprise the ascii string of standard SMS message.

Data flowchart 1750 among Figure 17 shows the possible communication stream between radio modem 1704 and subscriber equipment 1720 or the head end server 1716.It should be noted that data and configuration parameter can be sent to now or from subscriber equipment 1720 and head end server 1716.For example, data and configuration parameter 1724 can be sent to radio modem 1704 from client computer 1720.Equally, data and configuration parameter 1728 can be sent to client computer 1720 from radio modem 1704.It should be noted that data and initiation parameter 1712 can send to radio modem 1704 from head end server 1716, just as data and initiation parameter 1708 can send to head end server 1716 from radio modem 1704.By in conjunction with Short Message Service management method and technology described here, radio modem 1704 can serve as the learning bridge between subscriber equipment 1720 and the head end server 1716 effectively, thereby made things convenient for communicating by letter and control between conventional apparatus and the radio modem.

Figure 18 shows Short Message Service modem management algorithm 1800.In step 1804, radio modem 1704 receives the SMS message that starts from head end server 1716.In step 1808, analyze Incoming SMS message, and the result that will analyze stores in the storer of radio modem 1704 into.In step 1812, be the data that the check of a known order or designator is analyzed from step 1808, should carry out inter-process by radio modem 1704 to determine SMS message, still should carry out external treatment by subscriber equipment.For example, (for example, " +++AT ") a specific sequence compares, and is used for the purpose of modem operation management for the data by will storage and the character of order look-up table or indication SMS message.

If as the assay of step 1812, modulator-demodular unit behaviour administration order is identified, then in step 1816 by the specific program treatment S MS message of radio modem.Yet,, in step 1820, make SMS message by arriving subscriber equipment 1720 if the indication of the check in the step 1812 SMS message should be passed through radio modem 1704.

After step 1816 or 1820, initial processing is ended.Yet it is noted that this processing may comprise further step or specific function, they do not comprise the actual switching or the sign of Incoming SMS message.Because this specific treatment step is usually within the scope of the invention, therefore hereafter no longer, but in step 1816, mention suitably treatment S MS message of radio modem simply.In most applications, handle from the data of subscriber equipment 1720 or the same program of order and be used to handle the data or the order of transmitting via the transmission of SMS message from head end server 1716.

For example, additional command can comprise that the processor of instruction in the radio modem 1704 check the RF signal quality that detects on the RF transceiver, perhaps selects one through will communicate by letter with the radio modem particular channel of some information of air interface.In addition, order can comprise call history document of processor retrieval of instruction or daily record, and they have illustrated the calling that radio modem 1704 sends or receives.

Event detection and notice are used

Figure 19 A is the block scheme of electronic hardware in the radio modem, and with to combine Fig. 4 diagram similar with the radio modem of describing, it can handle event detection of the present invention and notice is used basically for it.Radio modem 1900 comprises power supply and clock circuit 1904.Power supply and ground wire are preferably supported the parts of the printed circuit board (PCB) of electronic hardware.Clock signal is shown as connection processing device 1908, although it can also be provided for other parts that comprise modulator-demodular unit 1900.

Nonvolatile memory 1912, for example, such as the electric variable of short-access storage or EEPROM but long-time memory, the connection processing device 1908 communicatedly.Nonvolatile memory 1912 is preferably held the software of processor 1908 operations, including but not limited to gsm communication protocol stack software and notice algorithm software (below will be elaborated).Volatile memory 1916 is such as a random access memory, and also the connection processing device 1908.Volatile memory 1916 is preferably held temporary storage variable and the out of Memory that uses in environment working time (that is, when processor 1908 is moving gsm protocol storehouse software or notice algorithm).

RF radio or RF transceiver 1920 be connection processing device 1908 also.The physics correction of RF transceiver 1920 deal with data and control signal is used for transmitting or receiving from air interface 1922 to air interface 1922.Air interface 1922 and base station communication as the part of GSM or GPRS network.The wireless universal network standard is known such as GSM and GPRS, thereby does not need they are elaborated.

According to an embodiment, processor 1908 comprises one or more interruption inputs.When interrupting detecting a state exchange in the input for one, the storage address of the program that retrieval process should be interrupted (a so-called exception vector).Processor 108 temporarily stops the processing of master routine subsequently, so that operation is by the algorithm of exception vector identification.Shown in Figure 19 A, an external signal via line 1932 is supplied to and connects interrupts importing 1924 socket 1928.Socket 1928 jointly is called " event detection interface " to interrupting input 1924 elements.It should be noted that other embodiment that also can adopt the event detection interface, below some such embodiment are elaborated.

For the purpose of explaining, below the internal signal on the circuit 1932 is called " alert if ".In fact alert if can be the warning by any kind of external circuit execution, for example, alert if can be gas leak the effective high/low signal show, keep sign (such as, an automatic vending machine has been used up stock), perhaps circuit-breaker tripping.It should be noted that circuit 1932 can comprise a single line or many lines.

Figure 19 B shows an automatic vending machine 1940.Input panel 1944 be used for selecting display window 1948 back stock (such as, candy or beverage), in case payment and select just is seated in the stock of selecting on the opening 1952.Specific stock or the in stock minimum level that reaches in automatic vending machine 1940 are perhaps evicted the coin of changing from when automatic vending machine, and the circuit in the automatic vending machine 1940 is created an alert if on circuit 1932.This circuit can generate high or low voltage strobe pulse, waveform, steady-state value or a control sequence on circuit 1932.Alert if on the circuit 1932 is by in the socket on the feed-in modulator-demodular unit 1,900 1928, thereby triggers an exception vector, makes processor 1908 carry out a notice algorithm.

In an alternative embodiment, the interruption that the alert if on the circuit 1932 does not need to send on the processor 1908 is imported.But, alert if can be on circuit 1932 another related input port of feed-in and processor 1908, such as the RS-232 port, parallel port, perhaps a particular data line on parallel port.(all said apparatus are embodiment of event detection interface.) in addition, processor 1908 can for the state variation on the circuit 1932 periodically poll event detect interface, rather than trigger an exception vector of call notification algorithm.If detect a state transformation, the own call notification algorithm of master routine then.

Figure 20 shows an embodiment of master routine 2000.The major function of master routine 2000 is to handle wireless protocols and handle to arrive or from the data of RF transceiver 1920.So master routine 2000 is a wireless protocols storehouse basically, such as gsm protocol storehouse, general packet radio service (" GPRS ") protocol stack, the mixing of GSM and GPRS, the perhaps protocol stack of another kind of type is such as CDMA (" CDMA ").

Step 2004 has shown the master routine that disposal/operation GSM handles.This processing will continue and not interrupt, until detect an alert if (or " incident ") in step 2008.If detect an alert if, then handle and proceed to notice algorithm 2100 shown in Figure 21.

Before explaining Figure 21, importantly, should be noted that more than one alert if, thereby more than one incident algorithm may be programmed in the modulator-demodular unit 1900.Owing to this reason, Figure 21 usually illustrates the processing of notice algorithm, and in fact it can be applied to the advise of same algorithm.

Turn back to Figure 21 now, alert if is determined on step 2104.Directly be fed in alerting signal under the situation of specific interruption input end, the fact that interrupting input end receives alerting signal is enough to determine to notify algorithm will handle alert if.This be because the input of each terminal have its own exception vector (although the exception vector can with (vector that makes an exception is identical) between two or more interruptions inputs.In step 2108, notice algorithm 2100 is set up the specific notification order that will use wireless protocols to send.Step 2108 may further include the step of setting up reading order data the document from one, and this is set up document and comprises particular data or the parameter of being used by notification command.

In one embodiment, this notice will send with the form of GSM Short Message Service (below be called " SMS ") message.Therefore, set up the text script that is used to transmit, such as " detect gas and leak IAC Hamption website, unit 3,07-23-9905:34PST ".Similarly, the text script can be " B3 uses up, SCU mansion 5, unit 2,06-09-99 18:23 PST ".In another embodiment, detect each time when interrupting, a plurality of alert if can be collected and add up to notice algorithm 2100.In case reach a threshold number of alert if, for example in an automatic vending machine, lack six kinds of fast foods and select, then notify algorithm 2100 that data are forwarded master routine 2000, be used for handling and transmitting through the wireless protocols storehouse.

In one embodiment, alert if triggers a standard commands form, for example, this standard commands form can be " AT～EVNTMSG=＜num 〉;＜" msg " ", wherein num is the telephone number (perhaps can be the IP address) that a GSM SMS (perhaps GPRS SMS) message will be transmitted, and msg is the ASCII text script of message.Set up after the order in step 2108, this order is transferred to the master routine 2000 that is used to handle in step 2112.In master routine 2000, monitor the wireless protocols storehouse of a notification command, receive the order of intrinsic call and bootup window suitably, for example, send msg text as SMS message to suitable telephone number (num).

The text script of the above-mentioned parameter that is used as the event message order and other data preferably are stored in the nonvolatile memory (such as storer 1912), this order only can be programmed once, and do not need externally to install (for example, automatic vending machine 1940) and go up set handling demand (outside the alert if circuit-may exist).

When the modulated detuner 1900 of a plurality of external events detected, a canonical solution multiplexer circuit in the modulator-demodular unit can generate the alert if of via line 1932 feed-in modulator-demodular units 1900.In such an embodiment, processor 1908 needs to monitor whole ports, and distinguishes interruption/input (shown in step 2104).

As for the wireless protocols storehouse of implementing in master routine 2000, Figure 15 A-Figure 15 C shows the various embodiment of the wireless protocols storehouse that comprises SMS message.A preferred gsm protocol storehouse is displayed among Figure 15 A, and GPRS (below be called " GSM ") protocol stack is displayed among Figure 15 A.Figure 15 B shows the GSM and the GPRS protocol stack of combination.Same numeral among Figure 15 A-Figure 15 C refers to components identical.

According to an embodiment, AT command interface 1504 and SMS layer 1516 are revised in protocol stack, make master routine 2000 will distinguish notification command from notice algorithm 2100 (for example, hereinbefore in conjunction with the order of Figure 21 explanation " AT～EVNTMSG=＜num 〉,＜" msg "〉").Specifically, AT command interface 1504 provides a convenient layer, and therein, the order of so many specific purposes can be combined, does not need to ask the substantial modifications to the wireless protocols storehouse, and still keeps the dirigibility in conjunction with additional function.

The present invention is preferably specialized the software code that comprises the AT command interface.On superimposed each at various wireless protocols storehouses of AT command interface.The AT command interface preferably receives the notification command from notice algorithm 2100, and this notification command is triggered by the alert if that the circuit in the external device (ED) is provided with.

Typical data stream is as described below.External device (ED) is such as incident of the electric circuit inspection in the automatic vending machine 1940.This circuit causes an alert if on circuit 1932.Circuit 1932 at its event monitoring interface to modulator-demodular unit 1900 detection feedback to alert if.This alert if causes exception/Interrupt Process pattern of processor 1908 inputs again, to suspend the processing in the master routine 2000 and to call a specific purpose notice algorithm 2100.This notice algorithm 2100 is handled these alert if, sets up the notification command and the data that are sent to the AT command interface then.Order and data from the AT command interface will be handled by the remainder of wireless protocols storehouse.

Master routine 2000 (comprising the wireless protocols storehouse) and notice algorithm 2100 can be implemented by one or more sequences of instruction, these instructions are stored in the computer readable medium, such as the nonvolatile memory that connects one or more processors in the radio modem communicatedly.The sequence of these instructions is edited (as the occasion at object code) in advance, and perhaps they can be by interpretive order.In addition, master routine 2000 and notice algorithm can be by various programming languages, and such as C, C++, compilation, perhaps BASIC is implemented.As for the notification command of transmitting between notice algorithm 2100 and master routine 2000, they can be implemented by identical programming language, but they are preferably based on the AT Command Set of a modification.

In addition, although master routine 2000 and notice algorithm 2100 are carried out according to carrying out object code usually, but the foundation and the initialization string (for example, the number of the alert if of telephone number, IP address, text message and firing event message) that are used to be sent to the particular event notification command of AT command interface can be stored as one or more revisable text documents.A debug port on the radio modem, an additional port, perhaps so the event detection interface (for example, a RS-232 port) can allow programming ground to revise and set up and initialization string, perhaps revise them with programming by SMS or other kind of message are sent to radio modem from head end server.

An advantage of the invention is that method and apparatus described here merges to individual data On terminal device or the radio modem, then with needs event detection and notification technique Legacy equipment combine. This combination of the present invention employs the attendant at this thereby reduced Check relevant expense on the equipment of kind. In addition, it provides ready-made a, monolithic Hardware, this hardware can be added on the traditional external device (ED), although need minimum degree , if any, external equipment is made amendment. In addition, in traditional external device (ED) Event detection and notifier processes (if any) can shift out from external equipment, and add Enter in traditional Multipurpose wireless modulator-demodulator.

Claims (44)

1. communications bridge, comprise that one is configured to receive data and described data-switching is become first interface of integrated data through serial transmission line, be used for being transmitted through the GSM network by a radio modem, described communications bridge also is configured to through circuit conversion call link to subscriber equipment of described tandem data circuit emulation.

2. communications bridge according to claim 1, wherein, described integrated data is the Short Message Service form.

3. communications bridge according to claim 1, wherein, described integrated data is the general packet radio service form.

4. communications bridge according to claim 1 comprises also being added to an application layer object code on the gsm protocol storehouse that described application layer object code is configured to handle the circuit conversion call link to the described emulation of described subscriber equipment.

5. communications bridge according to claim 1 also comprises:

A microcontroller;

A nonvolatile memory that connects described microcontroller;

A volatile memory that connects described microcontroller; And

An input/output control unit that connects described microcontroller, described input/output control unit comprises:

Described tandem data circuit, and

Second tandem data circuit that is configured to connect communicatedly described radio modem.

6. method that is used for a circuit conversion call link of emulation comprises: set up one to a subscriber equipment by the circuit conversion call link of emulation;

Prepare the described data that received by the circuit conversion call link of emulation of process, be used for transmitting through a NOT-circuit conversion call link as one or more groupings;

Be one and overflow the sequence supervision through the described described data that received by the circuit conversion call link of emulation; And

If detect the described sequence of overflowing, then abandon described NOT-circuit conversion call link and described by the circuit conversion call link of emulation.

7. method according to claim 6 also comprises the integrated data of preparing through the reception of NOT-circuit conversion call link, makes it to become serial data, is used for transmitting through described circuit conversion call link by emulation.

8. method according to claim 6 wherein, is prepared the described described data that received by the circuit conversion call link of emulation of process, comprises the described data of format, makes it to become the Short Message Service format packets.

9. method according to claim 6 wherein, is prepared the described described data that received by the circuit conversion call link of emulation of process, comprises the described data of format, makes it to become the general packet radio service format packets.

10. method according to claim 6 also comprises:

Send flow control data to described subscriber equipment, described flow control data is indicated the ability of described data terminal equipment processing from the data stream of described subscriber equipment; And

Configuration status information is used to verify the successful transmission of the data that arrive a destination.

11. computer readable medium, wherein, have one or more instruction sequences that are used for a circuit conversion call link of emulation, the one or more processors of described one or more instruction sequences are carried out any one the described action among the aforesaid right requirement 6-10.

12. a radio modem comprises:

A processor;

A storer that connects described processor, described storer comprises a software stack, described software stack is configured to hold one or more instruction sequences that make a wireless protocols of described processor processing;

A RF transceiver that connects described processor; And

An interface that connects described processor, described interface are configured to receive

Signal from external device (ED); Wherein

Described processor is configured to through the described signal of described interface processing from described external device (ED), and wherein, described processor also is configured to handle one or more short message service messages that transmit through described RF transceiver, and described short message service message comprises modem management information.

13. radio modem according to claim 12, wherein, described modem management information comprises the radio modem configuration parameter.

14. radio modem according to claim 12, wherein, described modem management information comprises an order that is used for radio modem, to carry out a function of described radio modem storage inside.

15. wave point according to claim 12, wherein, by from one or more described short message service messages, analyzing data, described one or more short message service messages that described processor processing receives through described RF transceiver, be the data that a modem management order sign is checked described analysis, if and detect described modem management order sign, then handle described short message service message.

16. radio modem according to claim 12, wherein, described wireless protocols is the mobile communication protocol of a global system.

17. radio modem according to claim 12, wherein, described wireless protocols is a general packet radio service agreement.

18. the method for a radio modem management may further comprise the steps:

On radio modem, receive a short message service message;

Be modem management information, check described short message service message;

If described short message service message comprises described modem management information, then on described radio modem, handle described short message service message; And

If described short message service message does not comprise described modem management information, then make described short message service message by described radio modem.

19. method according to claim 18, described inspection step may further comprise the steps: analyze described short message service message;

Be a modem management order sign, check described short message service message, described order sign indicates described short message service message whether to comprise described modem management information; And

Processor in described radio modem signals, if find described processing identifier then wait for an order that will move.

20. method according to claim 18, wherein, the described step of handling described short message service message at described radio modem comprises, according to the described radio modem of described modem management information initialization that contains in the described short message service message.

21. method according to claim 18, wherein, the described step of handling described short message service message on described radio modem comprises, checks the step of the quality of detected wireless signal on the described radio modem.

22. method according to claim 18, wherein, the described step of handling described short message service message on described radio modem comprises, handles the step to a request of call record history.

23. method according to claim 18, wherein, the described step of handling described short message service message on described radio modem comprises, selects a step that is used for the RF channel of radio communication on described radio modem.

24. method according to claim 18, wherein, the described step of handling described short message service message on described radio modem comprises, checking is to a send SMS message user's the step of service message of described radio modem.

25. method according to claim 18, wherein, the described step of handling described short message service message on described radio modem comprises that initialization is used for the messaging parameter of event detection and notice.

26. a computer readable medium comprises one or more instruction sequences, described instruction sequence is configured to make a processor to carry out as any one the described step that is used in the radio modem modem management among the claim 18-25.

27. a modulator-demodular unit comprises:

A processor;

A storer that connects described processor, described storer comprises a software stack, described software stack is configured to hold one or more instruction sequences that make a wireless protocols of described processor processing;

A RF transceiver that connects described processor; And

An event detection interface that connects described processor, described event detection interface is configured to receive a signal expressing an alert if; Wherein

By carrying out a notice algorithm from described software stack, described processor is configured the described signal that processing list illustrates an alert if, and described notice algorithm sends the data to described RF transceiver.

28. modulator-demodular unit according to claim 27, wherein, described wireless protocols comprises the global standards that are used for the transmission of mobile communication short message service message.

29. modulator-demodular unit according to claim 27, wherein, described wireless protocols comprises that the general packet radio service short message service message transmits.

30. modulator-demodular unit according to claim 27, wherein, the described signal that shows described alert if is admitted to the interruption input on the described processor.

31. modulator-demodular unit according to claim 27, wherein, the described signal that shows described alert if by described processor periodically the described event detection interface of poll detect.

32. modulator-demodular unit according to claim 27, wherein, described event detection interface communication ground connects an external device (ED), and described external device (ED) comprises the circuit that is used to produce the described signal that shows described alert if.

33. a method that is used for event detection and notice of using a radio modem,

May further comprise the steps:

Wireless protocols of operation in the processor in being included in described radio modem;

On an event detection interface that connects described processor, receive a signal that shows an alert if; And

Response receives the described step of the described signal that shows described alert if, moves the notice algorithm in the described processor.

34. method according to claim 33, wherein, described wireless protocols comprises the global standards that are used for the transmission of mobile communication short message service message.

35. method according to claim 33, wherein, described wireless protocols comprises that the general packet radio service short message service message transmits.

36. method according to claim 33 is further comprising the steps of:

Described processor is that described alert if is with the described event detection interface of cycle interval poll; And

If a particular alarm condition is detected, then call described notice algorithm.

37. method according to claim 33 comprises that also response receives the described signal that shows described alert if, generates the step of an exception vector, wherein, described exception vector is called described notice algorithm.

38. computer readable medium, comprise one or more instruction sequences, described instruction is configured to make a processor to carry out the step of event detection and notice in radio modem, and described one or more instruction sequences comprise any one the described step among the aforesaid right requirement 33-37.

39. a radio modem comprises:

A treating apparatus;

A storer that connects described treating apparatus, described storer comprises a wireless communication protocol storehouse; And

A RF transceiver that connects described treating apparatus; Wherein improvements comprise:

An event detection interface that connects described treating apparatus, described event detection interface is configured to receive an alerting signal from external device (ED); And

Wherein, if receive described alert if at described event detection interface, move a notice algorithm that also is stored in the described storer so, notification command of described notice algorithm invokes, described notification command cause a short message service message by described RF transceiver.

40. according to the described radio modem of claim 39, wherein, described wireless protocols comprises the global standards that are used for the transmission of mobile communication short message service message.

41. according to the described radio modem of claim 39, wherein, described wireless protocols comprises that the general grouped wireless short message service message transmits.

42. according to the described radio modem of claim 39, wherein, the described signal that shows described alert if is transmitted to the interruption input of described processor.

43. according to the described radio modem of claim 39, wherein, the described signal that shows described alert if by described processor periodically the described event detection interface of poll detect.

44. according to the described radio modem of claim 39, wherein, described event detection interface communication ground connects an external device (ED), and described external device (ED) comprises a signal generation device, and described signal generation device is configured to produce the described signal that shows described alert if.

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