MXPA99005712A - System for communicating messages via a forward overhead control channel - Google Patents

Abstract

Un sistema para comunicar mensajes de página o páginas múltiples a través de un canal de control aéreo de ida (forward overhead control channel, FOCC) del canal de control de una red celular a un dispositivo receptor compatible con un dispositivo celular y, combinar los datos recibidos de cada página recibida para formar un mensaje conjunto que comprende una secuencia de datos. Un dispositivo de comunicaciones celulares que opera en un estado normal responde a una página recibida a través del FOCC comparando la página recibida con una o más máscaras almacenadas en su memoria. Si la página recibida contiene una característica predeterminada y coincide con una máscara correspondiente almacenada en el dispositivo receptor,éste responde pasando de un estado normal a una estado de recepción de identificador de dispositivo. En el estado de recepción de identificador de dispositivo, el dispositivo de comunicaciones celulares monitorea el FOCC en busca de una página que tiene un identificador especial asignado a dicho dispositivo. Se compara cada página recibida con una máscara que corresponde al identificador especial y, estáalmacenada en la memoria del dispositivo seleccionado. En respuesta a. una coincidencia, el dispositivo de comunicaciones celulares pasa del estado de recepción de identificador de dispositivo a un estado de recepción de datos y monitorea el FOCC en busca de páginas que contienen comandos. En el estado de recepción de datos, el dispositivo de comunicaciones celulares puede responder a páginas que contienen comandos aceptando valores de datos de cada página de comando recibida y combinando los valores de datos a fin de formar una secuencia de datos.

Description

SYSTEM TO COMMUNICATE MESSAGES THROUGH AN IDA AIR CONTROL CHANNEL TECHNICAL FIELD The present invention relates generally to communication systems and more particularly relates to a system for communicating a message by sending a sequence of pages through an outbound air control channel of the control klO channel. cellular network for a cellular mobile radiotelephone system.

BACKGROUND OF THE INVENTION In recent years, the industry of the communications has shown a growing interest in different types of wireless communication systems for voice and / or data communication between numerous remote sites and a central location.

It is known that the use of a telephone installation dedicated to a conventional telephone system is not a convenient or economical option for all communication applications.

For example, in the case of many industrial applications, a central data collection site needs to obtain information from various remote monitoring devices that collect data on the operation or performance of the equipment. To get over P1383 / 99MX With the limitations of the conventional telephone system, a bidirectional wireless communication link is often necessary to allow a response to a communication originating in another location. In order to try to solve the problem of providing a response to an initial communication, the industry has offered various wireless communication systems, including bidirectional radios, mobile radiotelephones and paging systems. A conventional radio communications system uses a transceiver from a base station located at a site that favors the propagation of radio and a set of transceivers usually located in vehicles, such as those used by police or truck dispatch systems, or on remote equipment sites that communicate data in response to a command signal from a transceiver of the base station. Most radio communications systems are useful for establishing communications between short distances, for example within the limits of a locality or a city, through a very high frequency (VHF) radio connection. Although conventional radio communications systems are useful for applications in the field of specialized communications, bidirectional radios are not P1383 / 99MX widely accepted for general purpose communications. In general, the use of bidirectional radios is regulated by the Federal Communications Commission (FCC) and the assigned frequency spectrum is relatively limited. Likewise, the quality of the communications is subject to the propagation conditions between the communication sites. The bidirectional radio equipment is usually large and heavy and, therefore, it is unlikely that a user will carry it at all times or that it will be installed on small or existing equipment. Another form of bidirectional communications is a mobile cellular radiotelephone system (Cellular Mobile Radiotelephone - CMR), which is connected to the extensive public switched telephone network (Public Switched Telephone Network - PSTN) and which allows communications between a user of a mobile radiotelephone and another user of a conventional telephone (or other radiotelephone). Typical CMR systems are characterized by dividing a radio coverage area into smaller coverage areas called "cells" using low power transmitters and limited coverage receivers. The limited coverage area allows the radio channels used in one cell to be reused in another cell. When a mobile cellular radiotelephone located within a P1383 / 99MX When the cell crosses the limit of the cell and enters an adjacent cell, the control circuit system related to the cells detects that the intensity of the radiotelephone signal in the cell it has just entered is greater, and "passes" the communications that are made with the radiotelephone to the cell where you just entered. In that way, a CMR system can provide bidirectional communications in a variety of cells, and thus provide communications in a much larger area than conventional bidirectional radios. Conventional radiotelephones are generally used for both voice and data communications and, consequently, the radiotelephone service is usually provided at a cost commensurate with the combined voice and data services. However, this combination of both voice and data communications may exceed the requirements of a user who wishes to communicate only by voice or data. In addition, real-time voice or data communications are not always convenient in the case of a user who only wants to receive a message without interrupting the activity he is doing. As in the case of bidirectional radios, the frequency spectrum for the radio channels of a CMR system, particularly voice channels, is a limited resource.

P1383 / 99 X Radiopaging systems include pagers, which are miniature receivers, and at least one radiopaging terminal provided with a transmitter that covers a selected geographic area that contains numerous pagers. In order to respond to a page received through the conventional unidirectional paging system, the recipient of the page must search for an available conventional telephone and make a telephone call to the person who sent the page. Another alternative is for the recipient of the page to make the response call using a mobile radiotelephone, if one is available. Also known are radiopaging systems that offer the possibility of carrying out bidirectional communications to receive a page and transmit an acknowledgment of a page. Such page acknowledgment systems are very useful in the case of "in situ" communication systems within a local area by virtue of the power limitations of the transmitters used in the paging devices. The current systems of acknowledgment of pages require a large capital investment for the purchase and installation of equipment to implement a bi-directional communications system that covers a wide area of communications, since the number of receivers (and transmitters) of acknowledgment of receipt in a P1383 / 99MX Acknowledgment system is a function of the limited transmission power of the transmitter used in each of the pagers. Although the radiopaging industry is interested in supplying paging services subscribers with a page acknowledgment system, the cost of implementing a page acknowledgment system has discouraged the installation of such systems by part of many radiopaging service providers. In order to overcome the limitations of the previous communication systems, the assignee of the present invention has developed a system for data communication through the control channel of the cellular network of a CMR system. U.S. Patent Nos. 5,526,401 and 5,546,444 describe a use of the existing architecture of a CMR system adapted in an efficient and cost-effective manner to perform communications through the CMR system, including the collection and report data obtained from remote sites. A data messaging system includes a data reporting device, at least one mobile switching center (mobile switching center, MSC) and a data collection system connected directly or indirectly to the MSC or a Signal Transfer Point (STP). Each device P1383 / 99MX Data report can monitor the operation of a remote data source to collect selected data. The data reporting device can transmit a data message containing the selected data through the control channel of the cellular network of the CMR system when the data reporting device is first identified or "logged in" for its working with the MSC. Alternatively, the data reporting device may send the selected data through the control channel of the cellular network in the form of a data message representing a "call origin" signal. In turn, the MSC can send the data message to the data collection system through a communication link. In this way, the data message system takes advantage of an installed base of cellular communications equipment using the control channel of the cellular network for the communication of data between a central location and one or more remote sites. The data reporting system of the data message system is usually communicated to the MSC through the reverse overhead control channel (RECC) of the cellular network control channel. In contrast, the MSC can communicate with a device compatible with a cellular device, such as a reporting device P1383 / 99MX of data, through the forward air control channel (FOCC) of the control channel of the cellular network. The conventional technique of sending a message to a cellular mobile radiotelephone from an MSC is to transmit a one page message through the FOCC. For example, a cellular mobile radiotelephone can be stimulated by an MSC transmission to locate the mobile telephone unit when an incoming call from a landline has been made to this unit. The data requirements for this type of trigger messages are minimal in the case of conventional cellular communications and, consequently, each message is processed independently as a complete data packet. This works well in paging operations carried out by an MSC with conventional cellular mobile radiotelephones through the FOCC, but significantly limits the amount of information that the MSC can provide to a data reporting system of the data message system. developed by the assignee of the present application. By virtue of the foregoing, there is a need to transmit a data stream that extends beyond the capacity of a conventional paging message of a CMR system. There is also a need to adapt the paging mechanism P1383 / 99MX of a CMR system to allow the transfer of commands and data that exceed the transmission range through a discrete paging message. The present invention overcomes the limitations of the previous paging systems of a CMR system by sending a sequence of paging messages that can be added to the receiving site to increase the data capacity for communications from an MSC to a device compatible with a device cell phone.

SUMMARY OF THE INVENTION The present invention solves the problems of the prior art by providing a system for communication of a data sequence from a mobile switching center (MSC) to a device compatible with a cellular device through the channel of control of the cellular network of a cellular mobile radiotelephone system (cellular mobile radiotelephone, CMR), without modifying the standard structure or existing format of the control channel of the cellular network. Telecommunications service providers, including BellSouth Mobility, a company related to the assignee of the present application, have already installed the necessary equipment to obtain communications networks at a national level through CMR networks. The inventor recognizes that a CMR system represents a P1383 / 99 X existing communications architecture that can be adapted in a novel way to provide data communications with minimal impact on the data communications offered by the cellular mobile radio network. The present invention takes advantage of an installed base of cellular communications equipment using the control channel of the cellular network for data communication between a central location and one or more remote sites. Briefly described, the operating environment of the present invention is a data message system for communicating data from data sources. The data message system includes a set of data reporting devices, at least one mobile switching center (MSC) of a CMR system, and a data collection system connected to the MSC. Each data reporting device includes a monitor and a cellular communications device. The monitor, which is usually connected to a remote data source, monitors the operation of the remote data source to obtain selected data. The cellular communications device is connected to the corresponding monitor and, in response to selected data, transmits a data message containing the selected data. The selected data can be communicated through the network control channel P1383 / 99MX cellular of the CMR system when the cellular communications device is first identified or "registered" for operation with the MSC. As an alternative, the communications device > Cellular can send the selected data in the form of a message representing a call origin signal. The MSC receives data messages from cellular communications devices that operate within the coverage areas of the CMR system. In turn, the MSC sends the data messages to the data collection system through a first communication link. The data collection system, which is connected to a memory storage device, stores each data message and then processes the selected data messages. The data collection system may also transmit a stored data message to a data processing system through a second communication link. The data processing system, which also operates to store and / or process the contents of the data message, is usually located at a location remote from the data collection system. This allows to process the selected data in a central location more convenient for the user, instead of carrying out said operations in the location of the system of P1383 / 99MX data collection. Although the data collection system and the data processing system are usually located in different locations, the operations of the data collection and data processing system can also be combined or integrated by installing those systems in the same physical location. The data message comprises selected data and a predetermined identification feature that uniquely identifies the cellular communications device that transmits the data message to the MSC. The data message may be formatted such that it corresponds to an identification signal, sometimes called a registration signal, which is usually transmitted by a cellular radiotelephone unit when the device is first identified in the CMR system. Alternatively, the data message may be formatted in such a way as to correspond to a call origin signal, which is usually transmitted by a cellular radiotelephone unit when it originates a telephone call. The identification signal (originating call) usually contains different data fields containing a mobile telephone number (mobile telephone number, MIN) and an electronic serial number (electronic serial number, ESN). Accordingly, the identification feature is inserted P1383 / 99MX default in the data field that represents the mobile phone number and the selected data is inserted into the data field representing the ESN. Each cellular communication device is assigned a different identification feature, which may be a conventional telephone number, a selected ten-digit number or at least a part of a mobile telephone number [XXX XXXXXXX] belonging to a set of Unassigned mobile telephone numbers of the CMR system.

As an alternative, the MIN field can be a Identity of International Mobile Station (International Mobile Station Identity, IMSI) or a part of it. The IMS I, which fulfills an identification function similar to that of the MIN, is a predetermined set of digits that identifies a cellular radiotelephone unit. Next, a brief review of the present invention is made: a system for communicating with a selected cellular communications device is provided by sending multiple pages through the control channel of the cellular network of a CMR system. The cellular communications device usually monitors discrete pages, also known as page messages, in the control channel of the cellular network. Said pages are transmitted digital data streams through the channel P1383 / 99MX One-way air control (forward overhead control channel, FOCC) control channel of the cellular network. The pages usually include an address or identifier that has the identification feature. This address may be used to selectively communicate with a cellular communications device having said address or to cause one or more cellular communications devices to enter a certain operating state. A cellular communications device can recognize that a received page is addressed to it by comparing the address of the page with one or more masks that are kept in memory, usually non-volatile memory. A coincidence usually determines the steps that the communication device will have to follow in response to the reception of a page. For example, a match can determine whether the cellular communications device will go from a normal operating state to another operating state. For the data reporting system, a cellular communications device can exit the normal state and then enter a receiving device identifier state in response to receiving a page containing a predetermined characteristic. The cellular communications device determines that it has received a page containing a predetermined characteristic P1383 / 99MX monitoring the FOCC and comparing the default feature of the received page with a mask that is kept in memory. A match as a result of this comparison indicates that the page containing the default feature has been received. The page that contains the default feature is usually formatted to represent at least a part of the digits of a phone number, also described as a MIN, for the CMR system. In the device identifier receiving state, each cellular communications device monitors the FOCC in search of a page having a specific identifier assigned to the corresponding cellular communications device. To determine if a page containing the assigned specific identifier has been received, a comparison is carried out to establish whether a specific identifier matches a mask that is kept in memory. A match as a result of this comparison indicates that the page contains the specific identifier and must be accepted by the cellular communications device. In general, a number of masks can be stored in the non-volatile memory for comparison with the received pages. The page that contains the specific identifier is usually P1383 / 99MX formatted to represent at least part of the digits of a telephone number or MIN of the CMR system. To limit the duration of the monitoring operation, each cellular communications device can complete the monitoring operation of a page containing the specific identifier and return to the normal state in case a certain time has passed without receiving the page that has the specific identifier. If a selected cellular communications device receives a page containing its specific identifier, the selected cellular communications device can enter the state of data reception and begin to monitor the cellular network control channel in search of pages containing a command. In case the selected cellular communications device receives, while it is in the data reception state, pages containing a command, the data of each of these pages are accepted and combined to form a joint data message that contains a sequence of the data. In other words, the data stream is formed by the combination of a set of data obtained from a predetermined number of pages. The sequence of data is usually ordered by placing the data set of each P1383 / 99MX command page received within a sequence based on the order of reception. As an alternative, the data sequence can be arranged according to the sequence number assigned to each page. Typical commands include the following control actions: (1) load of data values of busy / unoccupied bits (busy idle bits, BIB), in which the data sequence comprises data values of BIB; (2) determining a predetermined time for a timer device connected to the selected cellular communications device, wherein the data sequence comprises timing data values corresponding to the predetermined time; and (3) acceptance of the data values contained in a particular part of each command page, and provision of the data sequence comprising the data values to a device external to the device to the selected cellular communications device. As will be described in more detail with reference to Figure 3, the cellular communications device can monitor the BIB signals transmitted by the FOCC of the cellular network control channel to allow the determination of the amount of activity in the RECC of the cellular network. a monitored cell of the CMR system. The cellular communications device may delay the sending of a P1383 / 99MX data message to an MSC until the activity level in the RECC is below a threshold level. The BIB data values of the "BIB load" command define maximum and minimum threshold levels to be used by the cellular communications device during the monitoring operation. To ensure the quality of data reception, the selected cellular communications device can respond to the receipt of command pages by monitoring the cellular network control channel in search of a page containing a verification command. For example, the selected cellular communications device may enter a verification status in response to a page containing the verification command and receipt of a predetermined number of pages. The data sequence is verified to determine if the data sequence was received correctly by said cellular communications device. If it is verified, it is possible to operate on the data sequence according to the command provided by the received pages. The cellular communications device can discard the data sequence if the data can not be verified correctly. Specifically, the data sequence is discarded if P1383 / 99MX a verification term provided by the verification command does not match a verification value calculated with the data in the data sequence. The data stream can also be discarded if the verification command page is not received within a certain maximum time period. The verification process can verify the data provided by the command pages by calculating a verification value and comparing it with a verification term transmitted by the verification page. The verification value is calculated by adding each pair of digits of data values of each page containing the command in order to obtain a hexadecimal sum-value of all the pages that contain the command. The second least significant pair of digits of the first page that contains the command is related in an exclusive disjunctive way with the hexadecimal sum value of all the pages that contain the command and a sum of exclusive disjunctive relation is obtained in this way. The resulting value is converted from a sum of exclusive disjunctive relation that has a hexadecimal value into a sum that has a decimal value. The calculated verification value is then compared to a verification term that represents the data set of the page containing the verification command. Outside of the verification process, the P1383 / 99MX Sequence of data can be discarded by a cellular communications device in case the time period between any pair of received command pages exceeds a certain maximum period of time. In addition, the data stream can be discarded in response to receiving more than a predetermined number of pages containing the command while monitoring the control channel of the cellular network. In another aspect of the present invention, there is provided a system for communicating a message by sending a predetermined sequence of pages to a cellular communications device selected through the FOCC of a control channel of the cellular network of a CMR system. Each cellular communications device monitors for pages in the control channel of the cellular network while operating in the normal state. Each cellular communications device goes from a normal state to a device identifier reception state (COMIN-RCV-DEVID state) in response to the reception of one of the pages that matches a first mask (COMIN-12) stored by each cellular communications device. A cellular communications device that operates in the receiving state of the device identifier can monitor the FOCC for pages containing P1383 / 99MX commands. A selected cellular communications device passes from a device identifier reception state to a data reception state (COMIN-RCV-DATA state) in response to the reception of a page matching a second mask assigned to a device. selected cellular communications. The selected cellular communications device operates in the data reception state to monitor the FOCC for pages containing commands. Each page that contains a command is usually formatted so that it represents a phone number or MIN that has a set of digits in the form ABCDEddddx, in which a part of the digits (ABCDE) corresponds to the first mask, another part of the digits (dddd) correspond to the data, and the last least significant digit (x) corresponds to a command. The selected cellular communications device can receive data while it is in the data reception state (COMIN-RCV-DATA state). Specifically, the data may be obtained in response to receipt of a predetermined number of command pages. Each of these command pages has a part that matches the first mask and a least significant digit that represents one of the commands.

P1383 / 99MX The selected cellular communications device can exit a state of data reception (COMIN-RCV-DATA state) and enter a verification status (COMIN-VERIFY state) (1) after receiving a predetermined number of pages containing the command and (2) in response to the receipt of one of the pages containing a part that matches the first mask and a least significant digit that represents a verification command. In the verification status, the selected cellular communications device verifies the accepted data. The verification task is completed by comparing a verification term on the verification page with a calculated value with the data provided by the pages containing commands. Once the received data has been verified, the selected cellular communications device can operate on the data sequence according to the command. The aspects of the present invention described above relate to the reception by one or more devices compatible with cellular devices selected from a set of such devices. This is adapted to the selective communication of the data sequence formed by the combination of multiple pages. To achieve a general distribution of a data set P1383 / 99MX extended, another aspect of the present invention allows the communication of multiple pages comprising the transmission-style data sequence for reception by all devices compatible with cellular devices within the coverage area of the MSC of the CMR system. In particular, a system is provided for data communication between an MSC and a set of cellular communications devices that operate within the scope of coverage of the CMR system. In order to send data from a cellular communications device to the MSC, the cellular communications device can transmit a data message containing selected data through the RECC of the control channel of a cellular network. The MSC can receive the data message and, in response, transmit the data message to a data collection system through a first communication link. The data collection system can collect the selected data in response to the receipt of the data message. The MSC can send pages, also called paging messages, to a set of cellular communication devices through the FOCC of the cellular network control channel. The cellular communications devices monitor the FOCC in search of a page that has a predetermined characteristic.

P1383 / 99MX Each cellular communications device that receives a page having a predetermined characteristic can monitor the control channel of the cellular network in search of pages containing a command. In response to receiving a predetermined number of pages containing the command, each cellular communications device can accept data from the predetermined number of command pages. The data taken from these pages are combined to form a joint data message containing a sequence of the data. Accordingly, the control channel of the cellular network can be used as a bidirectional communication link to transfer data between the MSC and the cellular communication devices. By virtue of the foregoing, these and other objects, features and advantages of the present invention can be understood and appreciated more clearly from the study of the detailed description presented below and with reference to the drawings and claims that are anoint BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram of a data message system, which provides the preferred operating environment for an embodiment of the P1383 / 99MX present invention. Figure 2 is a diagram showing the format of a data message that is exchanged between a cellular communications device and a mobile switching center (MSC) of the data message system illustrated in Figure 1. Figure 3 is a block diagram of a data message system data reporting system illustrated in Figure 1. Figure 4A and Figure 4B, described collectively as Figure 4, are logical flow diagrams illustrating the steps for communicating a joint message by sending a set of paging messages and combining the data values of the paging messages received in accordance with an embodiment of the present invention. Figure 5 is a diagram showing the format of a page transmitted by an MSC to a cellular communications device through the control channel of the cellular network according to an embodiment of the present invention. Figure 6 is a state diagram illustrating the operating states of a cellular communications device selected from a data reporting system according to an embodiment of the present invention. Figure 7 is a logical flow diagram that P1383 / 99 X illustrates a method for verifying the correct reception of data obtained in response to the receipt of pages containing commands according to an embodiment of the present invention. Figure 8 is a state diagram illustrating the operation states of cellular communication devices of a data reporting system according to another embodiment of the present invention.

DETAILED DESCRIPTION The present invention relates to a system for communicating with a cellular communications device by sending multiple paging messages, commonly described as pages, through the control channel of a cellular network of a cellular mobile radiotelephone system (cellular mobile radiotelephone , CMR) and combining data values of received pages to form a data sequence. Although a conventional cellular device can receive and process discrete pages transmitted through the forward air control channel (FOCC) of the control channel of a cellular network, the present invention provides the advantage of joining a sequence of pages to achieve a greater volume of data. This adds a new communication function for a device capable of P1383 / 99MX monitor the control channel of the cellular network since selected pages can be detected and combined to achieve a greater data communication capacity. The increased data communication capacity offered by the present invention allows the transmission and processing of data and commands or instructions, while the previous paging mechanism is limited to sending an instruction to a cellular device to be registered in the system of CMR in response to a telephone call. In contrast to the processing of discrete pages carried out by the above cellular devices, the present invention identifies multiple pages transmitted by the control channel of the cellular network to form a suitable data sequence containing content to be used by the receiving device . The present invention can allow the communication of a joint message by sending a sequence of pages to be received by a selected cellular communications device or by all cellular communication devices that are within the coverage area of the CMR system. The present invention is preferably designed to be used with a data message system but is adapted to the architecture of P1383 / 99MX existing communication protocols for a conventional CMR system to provide an advantageous approach for the communication of data collected from one or more remote sites. In this message system of data, which is described in U.S. Patent Nos. 5,546,444 and 5,526,401, a cellular communications device can send a data message to a mobile switching center (mobile switching center, MSC) through the channel ^ 0 control of the cellular network. A cellular communications device of the data message system can receive a page of the MSC through the control channel of the cellular network. The present invention improves the capacity of communications of the data message system by allowing the communication of multiple pages through ^ of the control channel of the cellular network to form a joint message containing a sequence of data to be used by the receiving device. It should be noted that the communication of data messages between the MSC and the cellular communications device is carried out by adapting conventional techniques and known protocols of a CMR system for data communications. In Consequently, before describing the detailed operation of the data message system, it will be useful to review the operation of a CMR system P1383 / 99MX typical A CMR system is usually characterized by dividing a radio coverage area into smaller coverage areas or "cells" using low power transmitters and restricted coverage receivers. As those skilled in the art already know, the limited coverage area allows the radio channels used in one cell to be used again in another cell. When a mobile radiotelephone goes outside the boundaries of a cell and enters an adjacent cell, the control circuits related to the cells detect that the signal strength of the mobile radiotelephone in the cell that it has just entered is greater, and the communications with the mobile radiotelephone are "passed" to the cell in which you just entered. A CMR system usually uses a pair of radio frequencies for each radio channel and each cell. Each cell usually includes at least one signaling channel, also called control channel of the cellular network or access channel, and several voice channels. The control channel is selected or intended to receive service orders of mobile and portable radiotelephones, to send pages to selected mobile or portable radiotelephones, and to instruct mobile and portable radiotelephones to tune into a voice channel P1383 / 99MX default where a conversation can take place. Consequently, the control channel is usually responsible for receiving and transmitting data to control the communication actions of mobile and portable radiotelephones. The control channel usually comprises an FOCC for communications from the MSC to the radiotelephone unit and a reverse overhead control channel (RECC) for communications from the radiotelephone unit to the MSC. The FOCC supplies a multiplexed data stream of message data words, a busy / unoccupied signal and busy / unoccupied bits. The busy / unoccupied bits are useful to indicate the current conditions of the RECC to the radiotelephones they monitor. If the radiotelephone unit is using the RECC, then the RECC is considered busy and the occupied / unoccupied bit is set to binary one. On the other hand, if the RECC is not in use, it is considered not busy, and the busy / unoccupied bit is set to the binary zero value. Mobile radiotelephones monitor busy / unoccupied bits transmitted by the FOCC and, if busy / unoccupied bit is set to binary one, the mobile radiotelephone delays transmission in the RECC until the busy / unoccupied bit is set in the zero binary value. In this way, a radiotelephone P1383 / 99MX transmits through the control channel taking advantage of the moment in which the transition from busy to unoccupied condition occurs. Specifically, the occupied / unoccupied bit provides an instantaneous view of the activity of the signaling in the control channel, and the conventional radiotelephone responds to this instantaneous view of the activity of the control channel. The specifications regarding data messages and radio channels for the US cellular radio systems. are set out in Rule 553 of the Electronic Industries Association / Telecommunications Industry Association (Electronic Industries Associat ion / Telecommunications Industry Association EIA / TIA), implemented in accordance with the Code of Federal Regulations C.F.R) NS 22, in the Report and Orders corresponding to registration No. 79-318 of the Federal Communications Commission (Federal Communications Commission) FCC). Copies of the EIA / TIA-553 can be obtained from the Engineering Department of the Electronic Industries Association, which is located in 2001 Pennsylvania Avenue, N.W., Washington, D.C., USA. 20006. It is known that when a cellular mobile radiotelephone originates a call, it transmits a series of P1383 / 99MX data messages to the server cell. These messages, commonly called the Call origin, are • defined by the EIA / TIA-553 standard. These data messages contain the seven low-order digits of the unit's telephone number, known as the Mobile Identification Number (MIN), the Station Class Mark (SCM) of the unit, and Call Address or dialed phone number. In general, operators of cellular systems also require that additional data words be transmitted within a call origin, order or NPA message of the cell phone number - and the Electronic Serial Number (Electronic Serial Number). Number - ESN). The provider of cellular service selected by the subscriber assigns the MIN to the radiotelephone. Generally, the MIN contains information unique to the operator of the CMR system; • For example, the first three digits of the MIN ("XXX") usually correspond to an area code, all three The next 20 digits ("XXX") usually correspond to a geographical location within the area code, and the last four digits ("XXXX") identify a particular device. In the same way, the ESN of each cellular radiotelephone is exclusive, and its format allows to identify the manufacturer and, in some cases, the model number, date of manufacture and other data.

P1383 / 99MX These messages are first provided to the cell and then, via a data link, to a mobile telephony switching center, also called a mobile switching center (MSC). The MSC also called "switch" performs voice connections between mobile radiotelephones and other telecommunications networks. In the MSC it is usually determined whether the radiotelephone corresponds to an authorized user or subscriber by searching for the telephone number, serial number and other data about the unit supplied by the radiotelephone to verify if there is an entry in the MSC database corresponds to said telephone. An optional function of the MSC is to verify that the ESN and the MIN received as part of a Call Source message are valid. If the MIN is valid and the radiotelephone is identified as a subscriber within the cellular system, ie if it is a "local" unit, the ESN received is compared with the ESN entered in the MSC database to detect whether there was fraud . If these tests are satisfactory, then the cellular call is allowed. It is also known that when a mobile radiotelephone is turned on or - while it is already on - entering for the first time in a CMR system, the unit can identify itself as active within the system. The radiotelephone identifies itself or P1383 / 99MX "is registered" through a process called Autonomous Registry through the provision of a data package that contains information similar to that of a call origin message. The autonomous registration signal, also called registration or identification signal, generally includes data fields corresponding to at least one mobile telephone number, ie the MIN and an ESN. The Autonomous Registry was designed with the purpose of improving the efficiency of possible future transmission of calls by keeping the MSC informed about the approximate whereabouts of each radiotelephone unit., and reduce the load of the message channel by decreasing the need to send messages to all cells when looking to locate a particular cell unit. When the MSC receives the information, it can then send a page or try to call the cell unit only in the cell or area where its presence was detected for the last time. Messages would be sent to additional cells only if the initial page could not locate the radiotelephone. Therefore, the Autonomous Registry consists of a set of messages that are sent periodically and autonomously from the mobile radiotelephone to the server cell at a certain interval in data parameters that the cell unit previously receives from the cell. With reference to the drawings, in which like numbers indicate like elements in the P1383 / 99MX various figures, Figure 1 illustrates a data message system 10 operating within a CMR 8 system. With reference to Figure 1, the data message system allows data collection and communication to a central site of data collection through reporting systems associated with numerous data sources. By operating within the CMR 8 system environment, which is suitably adapted to portable or mobile communications, the data message system 10 takes advantage of the existing wide area communication network and avoids the expense of communicating with each remote data site to through a dedicated conventional telephone installation or through conventional bidirectional radios. Numerous communications applications are available for the data message system 10, including the communication of data collected from a variety of data sources, such as service meters, community antenna television pay-per-view (PPV) terminals. (community antenna television, CATV), equipment that operates in isolated areas, and security alarm systems. The data messaging system is adapted by the existing environment of a CMR system to communicate data from one or more remote sites to a central location. However, to preserve the use of voice channels of the CMR system for conversations P1383 / 99MX conventional telephone systems, the data message system 10 uses the control channel of the cellular network of the CMR system for data communications. This allows to preserve the valuable frequency spectrum dedicated to the voice channels of the typical CMR system. A typical CMR system includes a geographic area of radio service, such as that indicated by cell 12, of which a series of cells is typically provided in a typical cellular service operator system. The cell 12 is served by a transmission antenna 14 which allows communications between cellular mobile radiotelephones operating within the cell 12 and a cell 16 control. A mobile telephone switching office, such as the MSC 24, can communicate with the cell 12 either through dedicated telephone facilities (not shown) or, as is most often, through a cell-mobile switching center 22 data link between cell control 16 and MSC 24. At least a part of the data link 22 usually has a wireless communication link, such as a microwave link 20, located between the cell 12 and the MSC 24. Those skilled in the art know that the conventional CMR system comprises at least a mobile telephone switch coupled to a set P1383 / 99MX suitable for cell sites 12 equipped in more or less identical fashion. The MSC 24 usually couples telephone conversations of mobile radiotelephones operating in the cell 12 to the public switched telephone network (PSTN) 26 through the telephone facilities 28. The data message system 10 includes a set of data reporting devices 29, each of which comprises at least one monitor 32 for collecting data from remote data sources 30 and a cellular communications device 34 for communicating the collected data through the control channel of the system of data. CMR to the MSC 24. The monitor 32, which is connected to a corresponding remote data source 30 through a signal path 31, obtains and records the selected data related to the performance characteristics or performance of the data source 30. In turn, the cellular communication device 34, which is connected to the corresponding monitor 32 through the path of signal 33, prepares a data packet containing the selected data and transmits the packet as a data message. The selected data represents actual data obtained by the monitor 32 in response to monitoring the operation or performance of the data source 30. Alternatively, the selected data may represent predetermined data P1383 / 99MX or a preprogrammed message that is related to the detection of a certain event by the data monitor 32 of the data source 30. The MSC 24 receives the data message through the control channel of a cellular network 38 formed by the combination of the data link 22 and a cellular communication link 36 between the transmission antenna 14 and the cellular communication device 34. This combination of communication links is referred to collectively as a control channel. It is known that the control channel of a cellular network of a conventional CMR system comprises two radio channels which are commonly described as a FOCC 38a and a RECC 38b. The FOCC 38a is used for communications initiated by the MSC to a radiotelephone unit. In contrast, the RECC 38b is used for communications of the radiotelephone to the MSC 24. The communication operations of the data message system also use this convention for communications between the MSC 24 and the cellular communication device 34. In particular, the control 38 comprises two different data communication paths, a FOCC 38a for communications initiated by the MSC 24 and a RECC 38b for communications initiated by the cellular communication devices 34 (or mobile radiotelephones operating within the cell). Consequently, the P1383 / 99MX cellular communications device 34 transmits data messages through the RECC 38b, while the MSC 24 transmits command signals through the FOCC 38a. In this way, the MSC 24 can receive data messages from any of the cellular communication devices 34 that operate within the coverage areas of a set of cells of the CMR 8 system. Although the data messages contain selected data in place of the data parameters normally contained in the actual control information of the radiotelephone, the MSC will operate on the data messages as if they were transmitted by a conventional radiotelephone operating within the cell because the data messages are formatted to have the appearance of a registration signal or a call origin signal generated by a radiotelephone unit. The MSC 24, in response to a data message, may perform one or more of the following operations: store the data message for further processing, process the selected data provided by the data message, or pass the data message to a data collection system 40 through a first communication link 42. The data collection system 40, which is connected to a storage device P1383 / 99MX memory 44, collects the selected data by storing the received data messages within the memory storage device 44. Similar to the MSC 24, the data collection system 40 can also process the selected data to obtain more information about the operation or performance of the data sources 30. Alternatively, the data collection system 40 sends the data message to a data processing system 46 via a second communication link 48. The data processing system 46 typically be remote from the data collection system 40 and facilitate the proper processing of the selected data at a central site. The second communication link is usually a conventional telephone installation, a dedicated data link or a wireless communication link. An example of a typical application of the data message system 10 is to monitor the charges of an electric charging system and communicate the data relating to energy consumption to a central site for processing. The service industry usually determines the effectiveness of an electric charge management system of a selected control scenario by collecting or monitoring data on the energy consumption of certain P1383 / 99MX users during cargo handling activities. In particular, the utility compares the maximum energy consumed by selected customers during certain collection periods with the maximum energy that would be consumed by such customers in the absence of any cargo management activity. An electrical service company typically uses a load profile recorder located near each customer's electrical load to record the customer's power consumption during predetermined time intervals. At the conclusion of the collection period, the recorded energy consumption data are then sent from each load profile recorder to a central data processing site for the translation and evaluation of the data. It is common the use of a conventional telephone system to send data on the energy consumption recorded by the recorder of the load profile to the data processing site. In the case of this application, the monitor 32 operates as a load profile recorder to obtain data on power consumption of the data source 30, in this case an electrical load. The cellular communications device 34 then transmits to the MSC 24 a data message containing the data on energy consumption. The MSC 24 can then pass the data message to the system P138 / 99 X data collection 40 for the processing of energy consumption data or, in turn, the data collection system 40 sends the data message to the data processing system 46 for processing operations. In this way, the electrical services company can collect data on the energy consumption of numerous electric charges to facilitate the evaluation of the effectiveness and cost-benefit of its electric charge management program. It should be recognized that the data message system 10 is useful for a wide range of data collection and reporting activities and that the examples described above are not intended to limit the scope of the applications of the present invention. Still with reference to Figure 1, in response to the transmission of a data message by a cellular communications device 34, the MSC 24 usually determines whether the cellular communication device 34 that transmitted the data message corresponds to a user or authorized subscriber of the services offered by the cellular system 8 or by another system. As shown in Figure 2 and as described below in relation to the format of the data message, the data message preferably includes certain information that identifies P13 83 / 99MX to the cellular communication device 34 as a radiotelephone that usually operates within a remote cellular system. On the basis of this information, the MSC 24 determines that the cellular communications device is a "roamer" since it seems to be subscribed to the cellular service offered by another cellular system, which, in this case, is the remote cellular system. In particular, the MSC 24 has a list or database that identifies the data message information as belonging to a particular cellular system and, upon reviewing this database, the MSC 24 determines whether the cellular communication device 34 is a Subscriber or a "roamer". In this way, it will be understood that the MSC 24 interprets the data message as a transmission from a "roamer" mobile radiotelephone operating within the CMR system 8. The remote cellular system identified by the data message is preferably intended for applications of data collection, and not conventional voice communications, and is represented by the data collection system 40. By recognizing that the cellular communication device 34 is actually associated with the remote cellular system, the MSC 24 passes the message of data to the data collection system 40 through the first communication connection 42. The data collection system 40 responds by sending to the MSC 24 a P1383 / 99MX message confirming that the "roamer" associated with the data message is a valid or authorized user of the remote cellular system. The cellular communications device 34 is added as a radiotelephone registered in a database of "roamers" registered in the MSC 24. The data collection system 40 receives the data message containing the selected data collected in the remote data source. 30 and, unlike the MSC 24, it detects that the data message actually contains the desired data collected in the remote data source 30. Accordingly, the data collection system 40 transmits a message to the MSC 24 in which it indicates to the MSC that erases the cellular communications device 34 from its list of registered wanderers. It will be understood that the MSC 24 would normally receive such messages when the "roamer" radiotelephone has been moved to another cellular system and has been registered to operate in said system. In this way, the database of the MSC 24 should no longer store the registration information relating to the communications device 34 once the data message has been transferred to the data collection system 40. Alternatively, the MSC 24 clears said record information of the database once a certain time interval has ended. He P1383 / 99MX data collection system 40 can respond to the data message by transmitting a message confirming that the "roamer" is a valid user and instructs the MSC 24 to delete the record after the determined time interval. Another option is for the MSC 24 to automatically delete a record from the MSC database at the end of a certain period of time without having received instructions from the data collection system 40. In this way, it is not necessary for the system to data collection 40 send another message to the MSC 24 after the data collection system 40 confirms that the cellular communication device 34 represents a valid user. The MSC 24 and the data collection system 40 are preferably compatible with Internal Standard 41 of the EIA / TIA (IS-41 standard). The IS-41 standard defines a communications protocol for communications between two cellular systems. The IS-41 standard allows cellular calls to be passed between dissimilar cell systems, similar to the way in which calls are passed between cells of the same CMR system. In addition, the IS-41 standard allows delivery of calls and an exchange of communications to verify if the person making the cellular call is a valid subscriber of the cellular service. In this way, the MSC 24 passes the data message to the system of P1383 / 99MX data collection 40 through a first communications link 42, which is preferably a network compatible with the IS-41 standard. In response, the data collection system sends a user validation message via link 42 to confirm that the source of the data message, specifically a cellular communications device 34, is a valid cellular source. In particular, the data collection system 40 recognizes that the received data message contains selected data that has been transmitted by a cellular communications device 34. Accordingly, the data collection system 40 processes the received data message and compares the predetermined identifying characteristics in your data message with a list of such characteristics in your database. In this database, the predetermined identifying feature for each of the known cellular communications devices 34 and the corresponding data identifying the device as a valid cellular source are entered. If there is a match, the data collection system 40 preferably responds to the received data message by sending a verification message to the MSC 24. It can be appreciated that the data collection system 40 can also pass to the MSC a message confirming the absence of a P1383 / 99MX valid entry corresponding to the cellular communications device 34 in case of no match. This validation message may also include a profile of communications services that are authorized for use by the determined cellular source. For example, this user profile generally defines the limitations of cellular source operations, including access to long distance services, the possibility that the source only originates (and does not receive) calls by the cellular system, etc. In the preferred model, the user profile information may indicate to the MSC 24 that it erase from its database the record of the cellular communications device determined after a certain period of time has elapsed. This allows the MSC 24 to erase from its database the entries corresponding to the cellular communications device 34 that have communicated data messages through the cellular system 8 registering in the MSC 24, since said devices no longer require the continued support of communications of the MSC 24. The data collection system 40 can store the selected data provided by the received data message within the memory storage device 44, process the data P13 83 / 99MX selected and store the resulting data, or pass the selected data to the data processing system 46 for processing. Before sending the selected data to the data processing system 46, the data collection system 40 converts the data message into an acceptable communication protocol for transporting the data message to the data processing system 46. This step is necessary before communication with the data processing system 46 because, unlike the MSC 24 and the data collection system 40, neither the data processing system 46 nor the second communication connection 48 are compatible with the IS-norm. 41 Although the MSC 24 is usually programmed to treat the cellular communication devices 34 as "roamers" associated with a remote cellular system, it will be appreciated that the MSC 24 database can also be programmed to contain revenue for the predetermined identification characteristics of those cellular communications devices 34 operating within cells of the cellular system 8. Upon receiving the data message through the control channel 38 from said device 34, an MSC 24 containing said database entries will identify the cellular communications device 34 that is broadcasting as a "local" unit and not as P1383 / 99MX "roamer" because the MSC database contains an entry that corresponds to the default identifying feature provided by the message. Accordingly, the MSC 24 registers the cellular communications device 34 that is transmitting as a local unit of the cellular system 8. This avoids the additional requirement of establishing contact with a remote cellular system, such as the data collection system 40, for ask if this cellular source is a valid user or subscriber of cellular services. However, to initiate the necessary transfer of the information contained in the data message to the data collection system 40, the MSC 24 of the present embodiment is prepared to recognize that there are still data messages that must be sent to the collection system. 40. Specifically, based on a part of the predetermined identifying feature that corresponds exclusively to the data collection system 40, the MSC 24 locates an entry in its database that instructs the switch to send to the data collection system. data 40 all messages that have this characteristic. Accordingly, the MSC 24 sends the data message through the first communication connection 42 to the data collection system 40.

P1383 / 99MX The data collection system 40 can be a computer. An embodiment of the data collection system 40 is the computer of a service circuit node. Certain switch manufacturers such as the MSC 24 also offer devices to implement communications with the data collection system 40, including the Motorola EMX switch and other vendor-exclusive switches. Among the switch manufacturers are: AT &T Network Systems (Whippany, New Jersey, United States), Ericsson Radio Systems (Richardson, Texas, United States), Hughes Network Systems (Germantown, Maryland, United States), and Motorola ( Schaumburg, Illinois, United States). The cellular system 8 is preferably an AMPS or DAPMS cellular system. However, it will be appreciated that the cellular system 8 may also be compatible with alternative cellular systems that have a control channel for communications from mobile devices to cells. It will be appreciated that the CMR system 8 includes a set of cells - such as cell 12 - and that in a cell a set of information systems 29 is generally located, each of which is formed by the monitor 32 and the device of cellular communications 34. For each data source P1383 / 99MX within the cell 12, the monitor 32 and the cellular communication device 34 are preferably located near the data source 30 to minimize the lengths of the signal paths 31 and 33. To make the installation of the information device more economical , the monitor 32 and the cellular communications device 34 can be combined within the same box and this box can be installed either adjacent to the data source 30 or as an integral part thereof. For an installation close to the data source 30, the signal path 31 and the signal path 33 preferably form a wired connection between the connected devices. However, it will be appreciated that the signal paths 31 and 33 may also be infrared communications links or wireless communications links. It should be understood that a single cellular communications device 34 may be connected to multiple monitors 32 in order to allow the transmission of selected data collected in corresponding data sources located at a central site. For example, a single cellular communications device 34 can be mounted at a central location within or along an office building and multiple monitors 32 can be distributed throughout the building to allow for obtaining P1383 / 99MX data from the corresponding data sources. The data collection system 40 may be located near the MSC 24 or as an integral part thereof, in which case the first communication link 42 preferably forms a wired connection between the devices. However, the data collection system 40 can also be located at a remote site. In the case of this remote installation, the first communications link 42 can be a wireless communication system, such as a microwave system, or a dedicated data line, such as a conventional telephone facility. For the convenience of those responsible for the collection of a particular type of data, the data processing system 46 is generally located at another remote site that is usually located near them. Figure 2 is a diagram showing the format of the data message that is communicated by the data message system 10. Referring to Figures 1 and 2, a data record 50 corresponding to the data message contains both a data field and a data record. data 54 for the selected data obtained in the remote data source 30 as a data field 52 for a predetermined identifying feature, which uniquely identifies the cellular communication device 34 that initiates the transmission of the data message. The data fields P1383 / 99MX they can be separated by one or more selected characters in order to distinguish the data fields. To take advantage of the existing architecture of the CMR 8 system, the format of the data message is preferably identical to the message format (or data record) corresponding to an identification signal transmitted by a cellular radiotelephone when it is first identified in a CMR system, such as the CMR system 8. Using the data message format corresponding to the registration signal, the cellular communication device 34 is registered in the MSC 24 by sending a data message that appears to contain a telephone number mobile and an ESN. Although the cellular communications device 34 will not make voice-based cellular telephone calls, the cellular communications device is registered to operate in the MSC 24, and thus allows communication of the selected field data. Alternatively, the format of the data message may be identical to the format or data record of the call origin signal transmitted by a cellular radiotelephone when it originates a telephone call. Similar to the format of a registration signal, the cellular communications device 34 may appear to originate a call by sending a data message whose format corresponds to a signal P1383 / 99MX Call origin to MSC 24. Although MSC 24 processes the data message as if it contained a mobile telephone number and an ESN, the data message is actually used to communicate selected data that is in one or more fields of data usually reserved for the mobile phone number and the ESN. Although the originating call signal format can be used to transport data from the cellular communication device to the MSC, it should be understood that the data message system is used by this format for data communication and not for the origin of calls. As shown in the data record 50 of Figure 2, the standard message format of a registration signal (call origin) has been adapted by the data message in order to allow both the identification of the cellular communication device 34 which performs the transmission as the communication of the selected data. In particular, the corresponding data field 52 the predetermined identifying feature coincides with at least a part of a mobile telephone number or MIN assigned to the cellular communications device 34. Therefore, the predetermined identification feature is replaced within the field of data of the call origin signal that is usually reserved for the MIN. This characteristic of P1383 / 99MX Default identification can belong to a set of unassigned mobile phone numbers. Alternatively, the predetermined identifying feature assigned to each cellular communications device 34 may be a conventional telephone number or a 10-digit set. The predetermined identifying feature allows the identification of the source of the data by unambiguously identifying the cellular communication device 34 corresponding to the remote data source 30. The predetermined identifying feature also provides information used by the MSC 24 to recognize that the message of data containing this predetermined identifying feature is associated with the data collection system 40. In addition, the data field 54 of the data message for remote data corresponds to the location within the data record of the ESN. The experts in the subject will appreciate that the ESN has a length of 32 bits and includes 8 bits for a code of the manufacturer. In the case of cellular systems that do not review the ESNs on the basis of the manufacturer's code segment, it is possible to manipulate the data field where an ENS normally appears to provide a data message having a data field 54 containing 32 Selected data bits. Nevertheless, P1383 / 99MX if the cellular system uses the segment of the ESN corresponding to the manufacturer's code, the information selected within the data field 54 has a length defined by the remaining 24 bits of the ESN. For most applications it will not be necessary to manipulate the ESN segment that corresponds to the manufacturer's code because a data message has 24 bits of selected information (and, as required, 8 bits of a conventional ESN segment corresponding to the code). from the manufacturer) should be sufficient to supply important data. Figure 3 is a block diagram illustrating the components of the report system 29, namely the monitor 32 and the cellular communications device 34. With reference to Figures 1 and 3, the monitor 32 includes a recorder 60, a memory 62, and one or more sensors 64. The recorder 60, which is connected to the data source 30 through the signal path 31, uses the sensors 64 to detect certain performance or performance characteristics of the data source 30. detected features represent selected data that is preferably stored within the memory storage device 62. The memory 62 is preferably a random access memory (RAM). However, it should be noted that the memory 62 may also be P1383 / 99MX constituted by other types of data storage devices, including flash memory, a flexible floppy disk, a computer hard disk or an optical disk. It can be appreciated that the signal path 31 represents one or more signal channels for transferring the selected channels to the recorder 60 and, furthermore, that the recorder 60 can be a single channel or multi-channel recording device. Each signal channel would normally be associated with a different performance or performance characteristic of the data source 30. For certain applications, the recorder 60 records selected data from the data source 30 for a predetermined period of time. A clock 66 connected to the recorder 60 supplies time data to the recorder 60, thereby allowing the recorder 60 to add a time indicator to the selected data. This timestamp indicates the relative time for the beginning of each predetermined time period of recording operations. Assuming that the predetermined time period is a known value, adding the time stamp data allows calculating the time of the start and end time of each data reporting operation. For certain processing operations, the correlation of the collection time with the data is desirable P1383 / 99MX selected. The clock 66 can be a conventional counter provided by a hardware device or a software routine executed by a microprocessor. The cellular communication device 34 may include at least one data receiver 70, a cellular transmitter 72, and a controller 74. The data receiver 70, which is connected to the recorder 60 through the signal path 33, receives the selected data obtained by the monitor 32 in the data source 30. The controller 74, which is connected to the data receiver 70 and the cellular transmitter 72, controls the respective operations of the data receiver 70 and the cellular transmitter 72. The controller 74 is preferably a control system based on a microprocessor that can be programmed to perform control operations in a known manner in this field. In response to the selected data, the controller 74 prepares a data packet containing the predetermined identifying characteristic corresponding to the cellular transmitter 72 and the selected data collected in the data source 30. The cellular transmitter 72 responds to the data packet by transmitting a message of data through the control channel 38 of the CMR system 8. Specifically, the cellular transmitter 72 uses the RECC of the P1383 / 99MX control 38 for sending data messages to the MSC 24. Although the cellular transmitter 72 may be a conventional transmitter of a radiotelephone unit, the preferred cellular transmitter 72 uses only the data radio channels of the CMR 8 system for the transmission of messages of data. The cellular communication device 34 further includes a memory storage device 76 connected to the controller 74 via a bidirectional data path. The selected data received by the data receiver 70 can be stored in the memory storage device 76 prior to the transmission of a data message made by the cellular transmitter 72. Although the memory storage device 76 is shown as a memory separate from the memory storage device 62, it will be appreciated that the memory storage devices 62 and 76 can be a single memory that can be accessed by both the recorder 60 and the controller 74. To connect the cellular communications device to another device, such as monitor 32, a signal path is connected between both devices, as shown in signal path 33 of Figure 3. Signal path 33 may be a conventional communications link compatible with known protocols, including the RS-232 protocol.

P1383 / 99MX To allow an exchange of data between both devices, the signal path 33 is preferably a bidirectional signal path. In addition to the external port connected to the signal path 33, the cellular communication device 34 may include other external data ports. These additional data ports may be connected directly to the controller 74, to a receiver and / or data transmitter or to a memory storage device. For example, an external port can be used to program the cellular communications device before field operations. Alternatively, an external port may be used as data output from the cellular communications device 34 to another device. It should be noted that the cellular communications device 34 is not limited to the only external port shown in Figure 3 and may include additional external ports as required for various applications. To receive communications from the MSC 24 through the FOCC of the cellular network control channel 38, the cellular communication device 34 also includes a cellular receiver 78. The cellular receiver 78, which is connected to the controller 74, can be a receiver cellular phone of a conventional radiotelephone. However, as in the case of P1383 / 99MX cellular transmitter 72, the preferred cellular receiver 78 receives the information mainly through the radio data channels and not through the voice radio channels of the CMR system. It is known that the FOCC of the cellular network control channel carries a busy / unoccupied bit stream to indicate the status of the RECC of the cellular network control channel. The RECC is busy if the busy / unoccupied bit is set to binary one.

In order to minimize the impact of transmissions made by one or more cellular communication devices 34 within the cell 12 on the normal traffic of the control signal in the control channel 38, the cellular transmitter 72 transmits Preferably the data message during the periods in which the channel is available or is • Probably is. Accordingly, the cellular receiver 78 monitors the FOCC of the control channel 38 so that the amount of activity can be determined in the RECC of the monitored cell. By monitoring the FOCC and counting the number of busy / unoccupied bits set at the binary value one for a predetermined period of time, the cellular communication device 34 can determine the activity level of the control channel during that period of time. If the activity level of the control channel falls below a certain threshold associated with activity P1383 / 99MX No or slight on the control channel, the controller 74 supplies the data packet to the cellular transmitter 72. In response, the cellular transmitter 72 initiates a data message transmission to the MSC 24 through the RECC of the control channel 38. In in particular, the cellular communications device 34 preferably monitors busy / unoccupied bits transmitted by the FOCC of the control channel 38 during predetermined sequential time periods. The cellular communications device 34 calculates and stores: (1) a running average of the "highest" count of busy / unoccupied bits set at the binary value one for each monitoring time period, and (2) a last count "n" of busy / unoccupied bits set at the binary value one per monitoring time period. To calculate the running average, a newly obtained count of occupied / unoccupied bits set at the binary one is averaged per period of time with a stored average of occupied / unoccupied bits set to binary one if the computation corresponding to the immediately preceding interval is greater than the value of one standard deviation less than the stored average. Before transmitting a data message through the control channel 38, the cellular communication device 34 will average the last counts P1383 / 99MX stored "n" of occupied / unfixed bits in the binary value one per time period and will compare that average "n" computed with the stored running average. If the computed average "n" falls below the stored running average, the cellular communications device 34 outputs the data message. However, if the average "n" computed exceeds the stored operating average, the cellular communications device 34 will delay transmission. Unlike conventional radiotelephone units, which respond to an instantaneous view of activity in the control channel, it can be seen that the transmission wait process described above is a heuristic method based on a deterministic analysis of the busy bit stream. not Bussy . In this manner, the cellular transmitter 78 delays the transmission of the data message until such time as the control channel is available for use by the cellular communications device 34. This form of data waiting decreases the possibility that the operation of numerous cellular communication devices 34 within cell 12 interfere with normal telephone conversations involving radiotelephones operating within the cell. However, it should be noted that the P1383 / 99 X cellular transmitter 78 may also transmit the data message without first controlling the availability of control channel 38. Alternatively, cellular communication device 34 may be programmed to transmit the data message during a certain time interval, such as during the first morning hours between midnight and 6 o'clock, when traffic control signals are normally at a minimum level. To enable this type of automated transmission operation, the cellular communications device 34 includes a clock 82 connected to the controller 74. The clock 82 issues a clock signal in response to the completion of a time interval. In response to the clock signal, the controller 74 initiates a data message transmission by the cellular transmitter 72. In this manner, the selected data is transmitted during a known time interval from one of the reporting devices within the cell 12 to a central location. The clock 82 preferably outputs the clock signal during the time period in which the use of the control channel 38 is at a reduced level, thereby decreasing the possibility of the cellular communications device 34 interfering with the operations of normal communications of the system P1383 / 99MX CMR 8. In particular, the time interval is preferably selected by knowing in advance the periods of reduced activity in the conventional telephone conversation traffic of the CMR 8 system in order to guarantee that the data message transmissions made by the various devices of Cellular communications 34 in cell 12 are carried out without interference with voice call processing messages transmitted to and from the radiotelephones operating in the cell. The clock 82 may be a hardware counter or a software counter consisting of coded instructions executed by the controller 74. A data transmission effected by the cellular communications device 34 may be initiated by the monitor 32 in response to the issuance of status signal through the signal path 33. This status signal causes the cellular communications device 34 to transmit the selected data stored through the RECC of the control channel 38. The monitor 32 usually outputs the status signal upon completion the recording of data. The monitor 32 usually outputs the status signal in response to the completion of a data recording event. For example, in a vending application, the monitor 32 can output a status signal in P1383 / 99MX response to an alarm, such as the detection of a maintenance service order. Alternatively, in the case of an application related to load management, the monitor 32 may output the status signal in response to detection of possible tampering of the utility's load control device. Those skilled in the subject will appreciate that the state signal is produced in response to events, and that the applications corresponding to the data message system will be determined by said events. It will be appreciated that the process of issuing a clock signal or a status signal for the cellular communication device 34 to initiate the transmission of a data message is similar to an Autonomous Register operation carried out by certain radiotelephone units. known. In the case of the Autonomous Register, the radiotelephone is automatically identified in the cellular system initiating its own registration operation. In the same way, in the case of the described embodiments, the cellular communication device 34 responds to the clock signal or to the status signal by sending a data message having a message format representing the data record of the signal register (call origin signal) of a radiotelephone unit. In turn, the MSC 24 receives the message P1383 / 99MX of data through the control channel 38 and acts on the data message as if it were a registration signal (call origin signal) transmitted by a conventional cellular radiotelephone unit. It is known that a control channel of the cellular network, such as control channel 38, is a bidirectional communication path between the MSC 24 and the radiotelephone devices operating in the cell 12. In particular, the MSC 24 can send a paging message or "page" to one or more radiotelephone devices that operate within the coverage area defined by cell 12 of the CMR 8 system. Unlike conventional radio paging systems, this page message is transmitted through of the FOCC of the CMR system and not through a radiopaging terminal. In CMR systems, this page message is usually used to notify a radiotelephone device that an incoming telephone call is pending and, thus, to indicate to the cellular device that it must register in the CMR system. The receiver 78 can receive pages from the MSC 24 through the FOCC of the control channel 38. For example, the MSC 24 can issue command signals, formatted as pages, through the control channel 38 to initiate certain operations or to control said operations. functions of one or more devices of P1383 / 99MX cellular communications 34 within the cell 12. The cellular communications device 34 may respond to a command signal by carrying out a particular operation or by controlling a particular function associated with the command signal. The command signal usually includes data about the address and each cellular communications device responds to a command signal having data about its predetermined address. This allows the MSC 24 to communicate with one or more determined cellular communications devices 34. By appropriately using the addressing operation, it is possible for the MSC 24 to remotely control the operations or functions of a subset of the cellular communication devices 34 selected from the group of devices 34 within the cell 12. The command signal is preferably a number of the digits representing a conventional mobile telephone number. At least a part of this telephone number can be assigned as the identifier of a corresponding cellular communications device 34. The remaining part (if any) of the 10-digit telephone number can represent a command or data of a particular operation or function. In this way, a cellular communication device 34 can be programmed to P1383 / 99MX respond only to a command signal that contains the data about its address and to perform only the specific operation or function identified by the command. By transmitting command signals to the cellular communications device 34, the MSC 24 can remotely control various operations of the cellular communications device 34 or can remotely define various programmable operating parameters of the devices 34. For example, in response to a signal of the selected command, the cellular communications device 34"is registered" in the MSC 24 by transmitting a data message to the MSC 24. It will be appreciated that this command signal is similar to a Location Order signal (Locate Request) conventional generated by a CMR system, such as the Autoplex system of AT & T, and requests the registration of the radiotelephony unit.

Using this command signal, a cellular communications device 34 can be interrogated at any time by the MSC 24 to initiate the transmission of a data message containing the desired selected data. In another representative example, in response to a command signal, the time interval of the clock 82 may be mortified or replaced by a substitute time period. The communications device P1383 / 99 X Cells 34 can also instruct the monitor 32 to initiate a data record from the remote data source 30 in response to another command signal. In particular, the controller 74 responds to the detection of the command signal by the cellular receiver 78 and issues an instruction signal to the recorder 60 for the data reporting operation to be performed. The possibility of using the conventional format of a paging message for commands or data, or for a combination of a command and data is limited by the defined number of digits of the paging message, usually the ten digit telephone number or MIN . In the case of relatively short data lengths, the transmission of a single page message from an MSC to a cellular device in the manner known in this field allows limited communications. The fixed data length of a page message is satisfactory for the paging communications task of conventional operations of the CMR system, namely the interrogation (polling) of one or more mobile radiotelephones within the coverage area of the CMR system. This polling technique requires only the transmission of a single discrete page message to incite a response by the mobile radiotelephone unit receiving the page. Prior to the present invention, there was no mechanism for P1383 / 99MX - use the paging message mechanism for the transfer of an expanded set of data. To increase the data capacity, the present invention provides a system for transmitting page or page messages through the control channel of the cellular network to a receiving device compatible with a cellular device and combining the data obtained from each page received to form a joint message containing a sequence of data. Although the present invention will be described with respect to the preferred operating environment of the data message system 10 shown in Figure 1, those skilled in the art will appreciate that the present invention can be eded to other operating environments. Figures 4A and 4b, collectively described as Figure 4, are logical flow diagrams illustrating the steps for communicating an eded data stream by sending multiple pages through the cellular network control channel and combining the data content of these pages to get a joint message. With reference to Figures 1, 4A and 4B, the communication process begins at the START 100 stage, in which the cellular communications device 34 operates in the normal state. The cellular communications device 34 may send a data message through the RECC to the MSC 24 in the P1383 / 99MX normal operating status. In addition, the cellular communications device 34 may respond to a discrete page operating to interrogate (poly) the cellular device. As part of this normal operating state, the cellular communications device 34 monitors the FOCC of the control channel 38 of the cellular network in search of pages in step 102. The cellular communications device responds to a received page by comparing the page with one or more masks stored in memory, such as memory 76 (Figure 3). A coincidence usually determines the action that the cellular communications device will perform in response to the received page. A mask may correspond to a MIN or an IMPSI transmitted by a page or "trigger" message transmitted by the MSC. For example, as described in U.S. Patent No. 5,530,736, assigned to the assignee of the present application, a radiotelephone may have multiple MINs, which may be active simultaneously during any given period of time. In step 104, it must be determined whether a page containing a predetermined characteristic has been received. The page that has the default feature is usually formatted to represent at least a part of the digits of a mobile phone number or MIN of a CMR system.

P1383 / 99MX The cellular communications device 34 determines that it has received a page containing a predetermined characteristic by comparing the received page with a mask stored in memory, such as the memory 76 (Figure 3). Said mask corresponds to the predetermined characteristic. A match as a result of this comparison confirms receipt of a page containing the predetermined characteristic by the cellular communications device. If the answer to the question in step 104 is negative, the "NO" deviation is followed until step 102 and the continuous monitoring process. If the mask stored in the receiving device matches the received page, the "YES" diversion is followed until step 106. In the preferred embodiment, the predetermined characteristic may be a unique set of digits the format of which represents a part of a MIN and it is assigned according to the geographical region. For example, a default feature for the Atlanta region is usually different from the default feature assigned to Pittsburgh. In step 106, the cellular communications device responds to a page containing the predetermined characteristic by going from the normal state to the device receiving identifier state. In step 106, the device P1383 / 99MX Cellular communications monitors the FOCC in search of a page that contains a special identifier. Each cellular communications device is assigned a unique identifier or unique address that allows the MSC 24 to communicate selectively with a desired cellular communications device. To determine whether a page contains the specific identifier assigned to the cellular communications device, a compan is made to verify whether a page containing the specific indicator matches a mask stored in memory, such as memory 76 (Figure 3). A match as a result of this compan confirms that the page has the specific identifier and must, therefore, be accepted by the receiving device. In general, a set of masks can be assigned to a particular cellular communications device and stored within the non-volatile memory to be compared with the received pages. Similar to the default feature, the page that has the specific identifier is usually formatted to represent at least a part of a mobile phone number or MIN of a CMR system. In the case of the preferred cellular communication device 34, a set of up to 10 masks correspond to a specific identifier and are stored within the memory not P1383 / 99MX volatile In step 108, the cellular communications device 34 determines whether a received page contains the specific identifier. If as a result of comparing the received page with each of the masks corresponding to the specific identifier there is no match, the "NO" bypass is followed until step 110. In step 110 it is determined whether a period of predetermined time If it has ended, the "YES" deviation from steps 110 to 102 is followed and the cellular communications device returns to the normal state. If the time period has not ended, the "NO" bypass is followed until step 106 and the cellular communications device continues to monitor the cellular network control channel in search of a page containing a specific identifier. It will be appreciated that the timer of step 110 allows defining a maximum period of time for the cellular communications device to search for pages with the specific identifier. The predetermined time period is preferably a maximum of sixty seconds. If the answer to the question of step 108 is positive, the "YES" deviation from step 108 to 112 is followed because the page received contains a special identifier. In response, the device P1383 / 99MX of cellular communications passes from the device receiving identifier state to the data receiving state. In step 112, the cellular communications device identified by the specific identifier monitors the FOCC for pages containing commands. Each command page preferably includes the predetermined characteic and one or more characters or digits corresponding to a recognized command. In the preferred embodiment, the least significant digit of the page containing the predetermined characteic represents a particular command. In the data reception state, the selected cellular communications device determines that a received page represents a command page determining that the received page contains the predetermined characteic and has a least significant digit corresponding to a recognized command. The recognized commands include the following control actions: (1) load data values of occupied / unoccupied bits (busy idle bits, BIB); (2) setting a predetermined time for a timer device connected to the selected cellular communications device; and (3) accept data values contained in a certain part of the page that has the command. In step 114, the device P1383 / 99MX cellular communications determines whether it has received a page containing a command. If the answer is negative, the deviation "NO" is followed to step 116. In step 116 it is determined whether a known period of time has ended. If it has not been completed, the "NO" bypass from step 116 to step 112 is followed and the monitoring operation continues in search of command pages. If the time period has ended, the "YES" deviation from steps 116 to 102 is followed and the selected cellular communications device returns to the normal state. It will be appreciated that the timer effectively limits the time that the cellular communications device uses to monitor for an initial command page before returning to the normal state. If in step 114 it is confirmed that the selected cellular communications device has received a page having a command, the "YES" bypass is followed until step 118. In step 118 it is determined whether the defined time period has ended the maximum time interval to receive a consecutive pair of command pages. If it has ended, the "YES" bypass is followed until step 120. In step 120, the content of each received command page is discarded. In turn, the process deviates from steps 120 to 103 and the selected cellular communications device returns to the state P1383 / 99MX normal. If the answer to the question of step 118 is negative, the "NO" bypass is followed to step 122. In step 122 it is determined whether the number of command pages received is greater than a predetermined number representing a maximum number of received command pages. If the number of command pages received exceeds the predetermined number, the "YES" deviation from step 122 to step 120 is followed and the data content of the received command pages is discarded. If the number of command pages is less than or equal to the predetermined number, the "NO" deviation from step 122 to step 124. is followed. It should be noted that the amount assigned to the maximum number of command pages received determines the maximum length of the sequence of data that will be formed by the combination of the data content of each received command page. If an excessive number of command pages is received while the cellular communications device is in the data reception state, the data corresponding to the received command pages are discarded in step 120 and the selected cellular communications device returns to the normal operating status. In step 124, it is determined whether the number of command pages received coincides with the predetermined number, ie the maximum number of pages of P1383 / 99MX command received. If it does not match, the "NO" bypass from step 124 to step 112 is followed to continue the monitoring operation in search of command pages in the data reception state. However, if the answer to the question of step 124 is positive, the "YES" bypass to step 126 is followed. In step 126 the data content of each received command page is accepted and combined to obtain a sequence of data. This sequence of data is preferably arranged by combining the data content according to the order of reception of the received command pages, that is to say according to the order of arrival at the place of reception. Also, the data values of the data stream can be arranged according to a sequence number assigned to each command page. For example, each command page can include a sequence number and the command pages can be ordered numerically according to the sequence number that each page received. The joint message representing the multi-page data content is examined in step 128 for verification. If the joint message is verified, the "YES" bypass to step 130 is followed. If the joint message can not be verified in step 128, the "NO" bypass to step 120 is followed and all data is discarded. In step 130, the device P13 8 3/9 9MX Selected cellular communications acts on the data sequence of the set message according to the command associated with the received command pages. In the FIN stage 132, the cellular communications device returns to the normal operating state. Figure 5 is a diagram showing the format of a page containing a command. To keep consistency with the defined format of a conventional page of a CMR system, the command page contains a set of digits representing a mobile telephone number (MIN). For the preferred format, the ten available digits of the MIN are used to represent a predetermined feature 140, a data set 142 and a command 144. The predetermined feature 140 comprises the first five most significant digits of the MIN, as shown in the characters AE of Figure 5. The next four digits, represented by the FH characters of the MIN, can be used for data values of a data set 142. The remaining digit of the MIN, the least significant, represents a command of 144. This digit minus A significant page of a command page is used to identify the action to be taken in response to the command page. Although the preferred format of the page P1383 / 99MX command uses the five most significant digits of a MIN to represent the predetermined characteristic, it should be noted that the present invention is not limited to a command page having a predetermined characteristic field comprising five digits. In the same way, the present invention is not limited to a command page that has a data set that contains the next four most significant digits of a MIN, but can be extended to a data set containing a greater or lesser number of digits. Also, the present invention can be extended to a command page formatted as a MIN with a command represented by more than one digit. Accordingly, the command page structure of the present invention includes data fields for a predetermined characteristic, for data and for a command. The predetermined characteristic 140, represented by the characters AE is usually assigned a predetermined value, and the cellular devices capable of receiving the command page, such as the general communications device, are equipped with a mask corresponding to this predetermined characteristic . This mask, commonly called the COMMAND MIN mask, is usually assigned the predetermined value ABCDEaaaaa, in which "ABCDE" represents the predetermined characteristic 140 and the P1383 / 99MX "a" is a wildcard value. In the case of cellular communication device 34, this COMMAND MIN mask can be programmed through a secure maintenance mode by applying the appropriate signal on an external port of the device. The COMMAND MIN mask is usually stored in the non-volatile memory of the cellular communications device 34. The data set 142, represented by the FGHI characters, are formatted such that they represent the least significant 2nd to 4th digits of an MIN and are reserved for data content. Typical data content includes: BIB values, date and time values, or a set of variable data. The least significant digit of the command page is assigned a predetermined value represented by the character "J" for a corresponding command 144 or action to be performed. For example, the command 144 for loading BIB values for use by the cellular communications device 34 is represented by the odd / even zero / one numbers. The command 144 for setting the date / time sequence is represented by odd / even two / three numbers. Command 144 to invoke a data stream is represented by odd / even numbers six / seven. Command 144 to invoke the verification task is represented by the odd / even numbers eight / nine. For each of these representative commands, either P1383 / 99MX The even digit or odd digit can be used to represent the corresponding command. The least significant digit of a MIN is used to represent a command 144 in the preferred communications system because some low-power processors used by cellular devices are usually programmed to monitor only one of a pair of "virtual" data streams carried by the FOCC. This allows conservation of energy for processor operations. By convention, the FOCC includes two virtual data streams, the current "a" and the stream "b". All even MINs are transported in stream a and all odd MINs are transported in stream b. This division of the FOCC currents between even and odd MINs allows the cellular device to monitor only half of the MIN-type signals and, as a result, to monitor the power consumed for this monitoring operation. Because certain low-power cellular devices receive only odd or even MINs, an even number and an odd number are assigned to represent each command. If a low-power radio can only receive even or odd MINs, the least significant digit of the MIN can represent only five of the ten normal states of decimal digits. In other words, the low radio P1383 / 99MX power will receive a least significant digit from the set of even or odd numbers, namely the set of even numbers 0, 2, 4, 6, 8 or the set of odd numbers 1, 3, 5, 7, 9. When the digit is less significant limited to only five possible states, it has a minimum value for the transmission of the data content. In order to grant some value to the least significant digit, this MIN digit is used to represent a command 144 and thus provide up to five different commands for the preferred communications system. In the case of higher-powered cellular devices capable of monitoring both streams of FOCC data, the character representing the command can be located anywhere within the ten-digit structure of the MIN. In effect, if an application requires more than ten commands, more than one digit can be used to represent a command within the command structure. Although the format of the command page is based on the data structure corresponding to the MIN of a conventional page of a CMR system, it should be noted that the present invention is not limited to the particular format shown in Figure 5. In the In case of other applications, it may be necessary to use more or fewer characters for the default feature, the data set and P1383 / 99MX the command to achieve a command page modeled according to the data structure of a MIN. Tables 1, 2, 3 and 4 illustrate representative examples of the data structure corresponding to certain command-type pages. Table 1 illustrates the data structure for the BIB load command; Table 2 illustrates the data structure of the time determination command; Table 3 illustrates the data structure of the generic data command; and table 4 illustrates the data structure of the verification command.

TABLE 1 Data structure of the "BIB load" command: ABCDEFGHI [0/1] Default ABCDE characteristic: Data set: FGHI Data value "FG": high priority threshold: value = (l% to 100%) - 1 Data value "Hl": low priority threshold: value = (l% to 100%) - 1 Command [0/1] the "Load BIB" command is represented by the least significant digit 0 or 1 The "Load BIB" command is an instruction P1383 / 99MX to load into the memory of the selected cellular communications device the data values defined by the data set "FGHI". The data value "FG" defines a high priority threshold value, while the data value "Hl" defines a low priority threshold value. As described above with respect to Figure 3, a cellular communications device can monitor BIB signals transmitted by the FOCC in order to determine the amount of activity in the RECC of a monitored cell of the CMR system. The cellular communications device may delay the sending of a data message to the MSC until the activity level in the RECC is below a certain threshold level. The BIB data values of the "BIB load" command define maximum and minimum priority threshold levels to be used by the cellular communications device.

TABLE 2 Data structure of the "Set Date / Time" command ABCDEFGHI [2/3] Default ABCDE characteristic: Data set: FGHI Data value a month / date value or a value "FGHI": time (hour / minute) P1383 / 99MX Command [2/3] the "Set date / time" command is represented by the least significant digit 2 or 3 The "Set date / time" command is an instruction that sets a predetermined time for a timer device connected to the selected cellular communications device. In the case of an external timer, the cellular communications device can provide the data set defined to the external timer through an external data port. The data set "FGHI" can define a month / date value or a time / time value. For example, the data value "1023" defines the date October 23, and the data value "1814" defines the 18.14 hs.

TABLE 3 Data structure of the Generic Data command: ABCDEFGHI [6/7] Default ABCDE characteristic: Data set: FGHI Data value Generic data values "FGHI": Command [6/7]: The "Summarize generic data" command is represented by P1383 / 99MX the least significant digit 6 or 7 The "generic data" command, also called the command to invoke generic data, is an instruction to load a defined data set into the memory of the selected cellular communications device. The data set "FGHI" can define a set of generic data comprised by four digits.

TABLE 4 Data structure of the Verification Command ABCDEFGHI [8/9] Default feature: ABCDE Data set: FGHI Data value "FGHI": Verification data term Command [8/9] the verification command is represented by the least significant digit 8 or 9 The "verification" command is an instruction to verify a sequence of data received by the cellular communications device at a predetermined number of previously received command pages. The data set "FGHI" P1383 / 99MX defines a verification term for comparison with a verification value calculated on the basis of previously received command page data sets. In response to the verification command, the selected cellular communications device can calculate the verification value and then compare this value with the verification term of the verification page. If a match arises from this comparison, the sequence of data to be used by the cellular communications device can be accepted. Figure 6 is a state diagram illustrating the various operating states of devices compatible with cellular devices capable of receiving pages of an MSC of a CMR system in accordance with the present invention. With reference to Figures 1 to 6, the initial operational state of the cellular communication device is the normal operating state 150. In the normal state 150, a cellular communication device 34 operates to pass data messages through the RECC of the channel of communication. control 38 of the cellular network to the MSC 24. Also, the cellular communications device 34 can respond to individual discrete page messages transmitted by the MSC 24 in the FOCC. Consequently, the cellular communication device 34 usually monitors the FOCC in search of P1383 / 99 X pages while operating in the normal state 150. In response to the reception of a page having a predetermined characteristic, the receiving device leaves the normal state 150 and goes to the state of reception of the device identifier 152. In the status of receiving the identifier 152, the cellular communications device 34 monitors the FOCC in search of a page containing a specific identifier assigned to said device. If it receives a page that contains the specific identifier, the receiving device will assume that the page is addressed to it and will enter the state of data reception 154. However, if a page containing the specific identifier is not received within a predetermined time period, preferably 60 seconds, the The cellular communications device will exit the state of reception of the device identifier 152 and will re-enter in the normal state 150. By setting a maximum time period of operation in the state of reception of the device identifier 152, a cellular communications device 34 can end the dedicated FOCC monitoring task in search of a page containing its specific identifier at the end of the maximum period of time. The cellular communication device 34 can also exit the receiving state of P1383 / 99MX device identifier 152 and return to normal state 150 in response to receiving certain command signals from an external port. These command signals include a Register command and an Initialization command. The registration command instructs the cellular communications device to register in the CMR system, while the Initialization command - serves to initialize the cellular communications device. Once it returns to normal state 150, cellular communications device 34 processes the received command through the external port. Accordingly, the application of certain command signals to an external port of the cellular communication device 34 will cause the device to return to the normal state 150. In response to receipt of a page containing a specific identifier that matches any of the masks stored in memory, the receiving device will change from the state of reception of device identifier 152 to the state of data reception 154. It should be noted that only those devices that receive a page containing a specific identifier that match a mask stored by the device they can pass to the state of data reception 154. This allows the selective communication of data sequences by sending a set of multiple pages that will be received and decoded P1383 / 99MX by a subset of possible receiving devices within the coverage area of the CMR system. A cellular communications device 34 operating in the data receiving state 154 monitors the FOCC for pages containing commands. In the preferred embodiment, these commands include the "Load BIB" command, the "Set date / time" command, the generic data command and the verification command. If the cellular communications device 34 receives a page containing a command, the data content associated with said command will be accepted and used if the following verification task succeeds. To increase the data capacity, a minimum number of pages containing commands must be received to accept the data content formed by the combination of data from those pages. However, if the number of pages containing commands exceeds a maximum threshold while the cellular communications device operates in the data reception state, the data content of the received command pages will be discarded. Accordingly, the cellular communications device preferably receives a number of pages containing a command in the data reception state before accepting the data values. If the cellular communications device P1383 / 99MX 34 is operating in the data receiving state 154 and has received a page comprising the predetermined characteristic and has a least significant digit 0 or 1, the data content will be used to invoke a "Load BIB" command if the task following verification is successful. If the cellular communications device 34 receives a page comprising the predetermined characteristic and has a least significant digit 2 6 3, the data content of this matching page will be used to invoke a "Set date / time" command if the next task Verification is successful. If the cellular communication device 34 is in the data receiving state 154 and receives a page comprising the predetermined characteristic and a least significant digit 6 or 7, the receiving device will capture and store the data content. This stored data will be output as a serial bus packet through an external port only if the next verification task is successfully completed. The verification task is initiated when the cellular communications device 34 leaves the data reception state and enters the verification status 156 in response to a verification command. The cellular communications device 34 leaves the state of data reception 154 and enters into P1383 / 99MX check state 156 in response to receipt of a page having the predetermined characteristic and a least significant digit 8 or 9. The data content of this page constitutes a verification term. While operating in the verification state 156, the cellular communications device 34 will compute a verification value based on the content of data obtained from the received command pages. If the calculation of the verification value does not match the verification term of the verification page, the complete data sequence is discarded and the device returns to normal status 150. Conversely, if the calculated verification value matches the term of verification, the cellular communications device 34 accepts the data sequence of the received command pages and acts on this data sequence according to the command. The cellular communications device 34 can return to the normal state 150 in response to the acceptance of the data sequence. While operating in the data receiving state 154, the cellular communications device 34 discards a complete data sequence if it receives more than two commands comprising the predetermined characteristic and a least significant digit 0 or 1. Accordingly, when operating in the reception status P1383 / 99MX of data, the cellular communications device will accept a maximum number of two command pages that have the "BIB Load" command. If the cellular communications device 34 is operating in the data receiving state 154 and receives more than two pages comprising the predetermined characteristic and a least significant digit 2 or 3, the receiving device discards the complete data sequence and returns to the state 150. As a result, the cellular communications device will accept a maximum of two "Set date / time" command pages while operating in the data reception state 154. While operating in the data reception state 154, if the cellular communications device 34 receives more than three pages comprising the predetermined characteristic and a least significant digit 6 or 7, the complete data sequence of the received pages is discarded and the receiving device returns to the normal state 150. In this way, the Cellular communication device 34 can accept a maximum of three command pages corresponding to gene data rich to be processed while operating in the receive status data 154. Tables 5, 6 and 7 illustrate representative examples of the communication of a message by sending multiple pages together through the FOCC P1 83/99 X of a CMR system and combining the data sets of these pages to form the joint message. Table 5 illustrates a sequence of command pages for invoking the "BIB Load" command. Table 6 illustrates a sequence of command pages for invoking the "Set date / time" command. Table 7 illustrates a sequence of command pages for invoking the "generic data" command.

TABLE 5 Page script to invoke "Load BIB" command Page 1: 0001000010 The reception of a page containing the Default Feature "00010" and the Command "0" causes the receiving device to enter the state of receipt of the device identifier for the "BIB Load" command.

Page 2: 0010001234 The receipt of a page containing the Specific Identifier ("0010001234") assigned to the receiving device causes it to enter the state of data reception.

Page 3: 0001079590 P1383 / 99MX The reception of the Page containing the Default Feature "00010", the Data Values 79 and 59, and the Command "0" causes the receiving device to receive BIB values between a threshold of 80% and a threshold of 60%.

Page 4: 0001001348 The reception of the page containing the Default Feature "00010" and the Command "8" causes the receiving device to verify the data sequence provided by the previously received command pages. "134" is the verification term, and "134" is the calculated verification value for data set "7959" on page 3. 15 TABLE 6 Page command to invoke "Set date / time" command Page 1: 0001010023 Reception of a page containing the Default Feature "00010" and Command "3" causes the receiving device to enter the state of receipt of the device identifier for the "Set date / time" command.

Page 2: 0010001234 P1383 / 99MX Receiving a page that contains the Specific Identifier ("0010001234") assigned to the receiving device causes it to enter the state of data reception.

Page 3: 0001010233 Reception of a page containing the Default Feature "00010" and Command "3" causes the receiving device to receive the data value ("1023") October 23.

Page 4: 0001018143 The reception of the Page containing the Default Feature "00010" and the Command "3" causes the receiving device to receive the data value ("1814") of 18.14hs.

Page 5: 0001001879 The reception of the page containing the Default Feature "000102 and the Command" 9"causes the receiving device to verify the data sequence provided by the previously received command pages." 187"is the verification value, and "187" is the verification value calculated for the data sequence formed by the combination of data set "1023" on page 3 and data set "1814" on page 4.

P1383 / 99MX TABLE 7 Page command to invoke "Generic Data" command Page 1: 0001010326 Reception of a page containing the Default Feature "00010" and Command "6" causes the receiving device to enter the state of receipt of the device identifier for the "generic data" command.

Page 2: 0010001234 The receipt of a page containing the Specific Identifier ("0010001234") assigned to the receiving device causes it to enter the state of data reception.

Page 3: 0001012346 The reception of the Page containing the Default Feature "00010" and the Command "6" causes the receiving device to receive data payload 1234.

Page 4: 0001056785 The reception of the page containing the Default Feature "00010" and the Command "6" P1383 / 99MX causes the receiving device to receive 5678 data payload.

Page 5: 0001002058 The reception of a page containing the Default Feature "00010" and the Command "8" causes the receiving device to verify the data sequence provided by the previously received command pages. "205" is the verification value, and "205" is the verification term calculated for the data sequence formed by the combination of the data set "1234" on page 3 and the data set "5678" on the page Four.

Figure 7 is a logical luxury diagram illustrating a method for verifying the correct reception of data obtained in response to the receipt of pages containing commands according to an embodiment of the present invention. With reference to Figures 1 and 7, the verification method begins with the START 170 step in response to receipt of a page containing a verification command. In step 172, the cellular communications device 34 determines that it has received a page containing a verification command and obtains the verification term from the verification page. For the data structure P1383 / 99MX preferred on the verification page, the verification value is a three-digit decimal value located between the default feature and the command. In step 174, the cellular communications device 34 obtains the data set of each received command page and calculates a sum of data by adding each pair of digits corresponding to each data set of the received command pages. Each pair of digits of each command page is treated as a hexadecimal byte and added to an eight-bit value. Any surplus due to this addition operation is not taken into account. In step 176, an exclusive disjunctive operation is performed for the sum of data of step 174 and the second pair of least significant digits of the first command page of the set of command pages received by the cellular communication device 34. The second The least significant digit of the first command page is treated as a hexadecimal byte value for this exclusive disjunctive operation. In stage 178, the hexadecimal value resulting from the exclusive disjunctive operation of step 176 becomes a three-digit decimal value. This three-digit decimal value represents the calculated verification value. In stage 180, P1383 / 99MX The calculated verification value is compared to the verification term provided by the verification term. In case of a coincidence of this comparison operation, the cellular communication device 34 accepts for its operation the data sequence formed by the combination of the data sets. Otherwise, the data sequence is discarded and the cellular communications device returns to the normal state. The verification process ends in stage FIN 182. The encryption process associated with the initial computation of the verification value carried out by the verification page is desirable because it is not an intensive computation operation, but nevertheless uses Enough encryption of the data set to prevent hackers from the CMR system from intercepting or decoding the data set. The present invention is not limited to the verification process described with reference to Figure 7 or to its corresponding encryption process. For example, other verification techniques may be used, including CRC techniques or exclusive disjunction. Figure 8 is a state diagram illustrating different operating states of devices compatible with cellular devices capable of receiving pages from an MSC of a CMR system. TO P1383 / 99MX Unlike a data reception operation carried out by selected cellular communications devices, as illustrated in the diagram of Figure 6, each cellular communications device that receives a particular page while operating in the normal state enters the state of reception of data. Therefore, the state diagram of Figure 8 illustrates the operation states of cellular communication devices capable of receiving command pages transmitted by the MSC in a "broadcast" mode. In the case of this transmission of type transmission of pages containing a combination of commands and data, there is no requirement to send a page containing a specific identifier to cause a cellular communications device to enter the state of data reception. Each cellular communications device that receives a page that contains a predetermined feature while it is in the normal state can enter the state of data reception. The predetermined characteristic of the page described with respect to Figure 8 is different from the predetermined characteristic described with respect to Figure 6 to allow separation between the selected communication operations and transmission communication. Communications operations P1383 / 99MX selected ones are usually carried out to send data to one or more cellular communications devices selected among a possible set of devices, while transmission communication operations are carried out to transmit data to all available cellular communications devices capable of receiving a certain page that causes these devices to go from a normal state to a state of data reception. With reference to Figures 1 and 8, the initial operating state of the cellular communications device is the normal operating state 190. In the normal state 190, a cellular communications device 34 sends outbound data messages through the RECC to the MSC 24 and can respond to individual discrete pages, rather than to an orderly sequence of multiple pages, transmitted by MSC 24 in the FOCC. Each cellular communications device usually monitors the FOCC in search of pages while it is in the normal state 190. In response to the reception of a page having a predetermined characteristic, the receiving device leaves the normal state 190 and enters the state of data reception 192. Specifically, all cellular communications devices that receive a page containing a predetermined characteristic that matches a stored mask P1383 / 99MX by said devices they can enter the data receiving state 192. The predetermined characteristic of this page is different from the predetermined characteristic of the page described 5 above with reference to Figures 6 and 7. The use of different predetermined characteristics for these Pages allows a cellular communications device to distinguish between the communication tasks associated with the pair of pages. 10 A cellular communications device 34 ^ »W operating in the data receiving state 192 monitors the FOCC for pages containing commands. Similar to the commands described with reference to Figure 6, the commands include the "Load BIB" command, the "Set date / time" command, the generic data command and the verification command. If the cellular communications device 34 receives a page containing a command, the data content associated with the command will be accepted and used if the following verification task succeeds. Also, the cellular communications device must accept a predetermined number of pages that it contains in the data reception state before accepting data values.

If the cellular communications device 34 is operating in the data receiving state 192 and has received a command page comprising the P1383 / 99MX default feature and has a least significant digit 0 or 1, the data content of this page will be used to invoke a "Load BIB" command if the next verification task is successful. If the cellular communications device 34 receives a command page comprising the predetermined characteristic and has a least significant digit 2 or 3, the data content of this matching page will be used to invoke a "Set date / time" command if the Next verification task succeeds. If the cellular communication device 34 is in the data receiving state 192 and receives a command page comprising the predetermined characteristic and a least significant digit 6 or 7, the receiving device will capture and store the data content. This stored data will exit through an external port only if the next verification task is successfully completed. The verification task is initiated when the cellular communications device 34 leaves the data reception state and enters the verification status 194 in response to a verification command. The cellular communications device 34 leaves the data reception state 192 and enters the verification status 194 in response to the reception of a page having the characteristic.

P1383 / 99MX default and a least significant digit 8 or 9. The data content of this page constitutes a verification term. While operating in the verification state 196, the cellular communications device 34 will compute a verification value based on the content of data obtained from the received command pages. If the calculation of the verification value does not match the verification term of the verification page, the complete data sequence is discarded and the device returns to the normal state 190. Conversely, if the calculated verification value matches the term of verification, the cellular communications device 34 accepts the data sequence of the received command pages and acts on this data sequence according to the command. The cellular communications device 34 returns to the normal state 190 in response to the acceptance of the data sequence. When operating in the data reception state, the cellular communication device 34 will accept a maximum number of two command pages having the command "BIB upload". In the same way, the cellular communications device will accept a maximum of two "Set date / time" command pages while operating in the data reception state. Also, the cellular communications device 34 P1383 / 99MX can accept a maximum of three command pages corresponding to generic data to be processed while operating in the state of data reception 154. Tables 8, 9 and 10 illustrate representative examples of communication by transmission of a joint message by sending multiple pages to through the FOCC of a CMR system and combining the data sets of these pages to form the joint message. Table 8 illustrates a page script to invoke the "BIB Load" command. Table 9 illustrates a sequence of page commands for invoking the "Set date / time" command. The table is illustrated by a page script to invoke the "generic data" command.

TABLE 8 Page script to invoke "Load BIB" command Page 1: 0010000010 The reception of a page containing the Default Feature "00100" and the Command "0" causes the receiving device to enter the state of receipt of the device identifier for the "BIB Load" command.

Page 2: 0010079590 P1383 / 99MX The reception of the Page containing the Default Feature "00100", the Data Values 79 and 59, and the Command "0" causes the receiving device to receive BIB values between a threshold of 80% and a threshold of 60%.

Page 3: 0010002198 Reception of the page containing the Default Feature "000102 and Command" 8"causes each receiving device to verify the data sequence provided by the previously received command pages." 219"is the verification value and" 219"is the verification term calculated for the set of data "7959" on page 2.

TABLE 9 Page script to invoke "Set date / time" command Page 1: 0010010023 The reception of a page containing the Default Feature "00100" and the Command "3" causes each receiving device to enter the state of reception of the device identifier for the "Set date / time" command.

P1383 / 99MX Page 2: 0010010233 Reception of a page containing the Default Feature "00100" and Command "3" causes each receiving device to receive the data value ("1023") October 23.

Page 3: 0010018143 The reception of the Page containing the Default Feature "00100" and the Command "3" causes each receiving device to receive the data value ("1814") of 18.14hs.

Page 4: 0010000509 The reception of the page containing the Default Feature "00100" and the Command "9" causes each receiving device to verify the data sequence provided by the previously received command pages. "050" is the verification value, and "050" is the verification term calculated for the data sequence formed by the combination of the data set "1023" on page 2 and the data set "1814" of the page 3.

TABLE 10 Page script to invoke "Generic Data" command P1383 / 99MX Page 1: 0010010326 Reception of a page containing the Default Feature "00100" and Command "6" causes each receiving device to enter the state of receipt of the device identifier for the "generic data" command.

Page 2: 0010012346 Reception of the page containing the Default Feature "00100" and Command "6" causes each receiving device to receive data payload 1234.

Page 3: 0010056785 The reception of the page containing the Default Feature "00100" and the Command "6" causes each receiving device to receive 5678 data payload.

Page 4: 001001868 The reception of a page containing the Default Feature "00100" and the Command "8" causes each receiving device to verify the data sequence provided by the previously received command pages. "186" is the verification value, and "186" is the verification term calculated for the data sequence formed by the P1383 / 99MX combination of data set "1234" on page 2 and data set "5678" on page 3.

In summary, the present invention provides a system for communicating page or multiple page messages through the control channel of a cellular network to a receiving device compatible with a cellular device and combining the data obtained from each page received in order to form a joint message comprising a sequence of ordered data. By sending multiple pages and combining the data from these pages at the reception location, the data communication capacity of the CMR system can be improved. In the preferred operating environment of a data message system, a cellular communications device operates in a normal operating state and monitors the FOCC of the cellular network control channel in search of pages. The cellular communications device responds to a received page by comparing the received page with one or more masks stored in the memory. A coincidence usually determines the steps to be followed by the cellular communications device in response to the received page. For example, if the received page contains a predetermined characteristic and matches a corresponding mask, the device P1383 / 99MX Cellular communications responds by moving from the normal state to a receiving state of the device identifier. In the device identifier receiving step, the cellular communications device monitors the FOCC in search of a page having a special identifier. It is usually assigned to each cellular communications device a special identifier, which serves to identify the device in a unique way. To determine whether a page contains the specific identifier assigned to the cellular communications device, a comparison is carried out to determine whether a received page matches a mask corresponding to the special identifier and is stored in the memory of the selected device. A match as a result of the comparison task confirms that the page contains the specific identifier and must, therefore, be accepted by the receiving device. In response, the cellular communications device passes from the state of reception of the device identifier to a state of data reception. In the data reception state, the cellular communications device monitors the FOCC in search of pages containing commands. Each page command can contain a command and a P1383 / 99MX data set. The data content of each received command page is accepted and combined to form a data stream. This sequence of data can be ordered by combining the data content in the order of reception of the received command pages. Alternatively, the data values of the data stream can be ordered based on a sequence number assigned to each of the command pages. The joint message representing the multi-page data content may be examined for verification purposes in response to receipt of a page containing a verification command by the cellular communications device. The cellular communications device may enter a verification status in response to the verification page, if the joint message is verified, the cellular communications device may act on the sequence of data of the joint message in accordance with a command associated with the command pages received. The cellular communications device then returns to the normal operating state. If the received page contains a different predetermined characteristic, and matches another mask stored by the cellular communication device, the P1383 / 99MX cellular communications responds by moving from the normal state to the state of data reception. Each cellular communication device may include a mask corresponding to this alternative predetermined feature. In consecuense, each receiving device can directly go to the data reception state, instead of the receiving state of the device identifier, in response to a page containing this alternative default feature. This allows the communication of a data stream through a set of multiple pages to a general group of cellular communication devices instead of one or more selected receiving devices.

P1383 / 99MX

Claims (24)

1. NOVELTY OF THE INVENTION Having described the present invention, it is considered as a novelty and, therefore, the content of the following CLAIMS is claimed as property: 1. A method for communicating with a selected device of a series of cellular communication devices sending multiple pages through the control channel of the cellular network of a cellular mobile radiotelephone system (CMR), comprising the steps of: monitoring the control channel of the cellular network in search of one of the pages which contains a specific identifier assigned to the cellular communications device selected in response to receipt of a page having a predetermined characteristic; monitor the control channel of the cellular network looking for pages that contain a command in response to the receipt of the page that has the specific identifier; and in response to the receipt of pages containing the command, combine the data from each of the pages to form a joint data message containing a sequence of the data.
2. 2. The method of claim 1 which P1383 / 99MX it also comprises the steps of: monitoring the control channel of the cellular network in search of one of the pages containing another command in response to the reception of the command pages; verify the data sequence of the data message set in response to receiving a page containing the other command. The method of claim 2 further comprising the step of discarding the data stream if a check term of the other command page does not match a check value calculated with the data of the data stream. The method of claim 2, further comprising the step of discarding the data stream if the command page is not received within a certain maximum period of time. The method of claim 2, further comprising the step of discarding the data stream if a period of time between two pairs of command pages received exceeds a given maximum period of time. The method of claim 2 further comprising the step of discarding the data stream in response to receiving more than a predetermined number of pages containing the command while monitoring the network control channel P1383 / 99MX cell phone . The method of claim 2 further comprising the step of responding to the verification of the data sequence by operating on the data stream according to the command. The method of claim 1, wherein the data combining step comprises arranging the data of each received command page based on the arrival of the corresponding command page to the selected cellular communications device. The method of claim 1, wherein the step of combining data comprises ordering each command page received in an order sequences on the basis of the numerical value contained in each command page. The method of claim 1, wherein the step of receiving one of the pages having the predetermined characteristic comprises the steps of: comparing at least a part of the received page having the predetermined characteristic with a mask stored in the memory of each cellular communications device; and accept the page if the part of the page matches the mask. 11. The method of claim 10, in P1383 / 99 X that the page that has the default feature is formatted in such a way that it represents at least a part of a telephone number (MIN). The method of claim 1, wherein the step of receiving one of the pages containing a specific identifier comprises comparing at least a part of the received page containing the specific identifier with a set of masks stored in the memory of the selected cellular communications device; and accept the page if at least part of the page matches one of the masks. The method of claim 1, wherein the step of monitoring the cellular network control channel in search of one of the pages having a specific identifier assigned to the selected cellular communications device comprises: monitoring the cellular channel. control of the cellular network for a certain period of time after receiving one of the pages having the predetermined characteristic; and finish the monitoring stage if you spend a certain period of time without receiving one of the pages that contain the specific identifier. 14. The method of claim 1, wherein the command defines an action to load values of P1383 / 99MX Busy / unoccupied bit data (busy idle bits, BIB), and the data stream comprises BIB data. The method of claim 1, wherein the command defines an action for the selected cellular communications device to set a specific time for a timer device connected to the selected cellular communications device, and the data stream comprises data values of timing corresponding to the predetermined time. The method of claim 1, wherein the command defines an action for the selected cellular communications device to accept data values contained in a particular part of each page containing the command, and to provide the sequence of data it contains the data values to a device external to the selected cellular communications device. The method of claim 1, wherein the page containing a command comprises digits of a telephone number (MIN), and wherein the command page has a format comprising certain digits of the telephone number representing the default feature, other digits of the phone number that represent data values, and a remaining digit of the phone number that identifies the action associated with the command. P1383 / 99MX 18. The method of claim 1 further comprising the steps of verifying the data provided by the predetermined number of pages containing the command by calculating a verification value in response to receipt of a page containing another command, said calculation comprising the steps of : add each pair of digits corresponding to the data of each page that contains the command in order to obtain a hexadecimal sum-value of all the pages that contain the command; establish an exclusive disjunctive relationship between the second least significant pair of digits of the first page containing the command and the hexadecimal sum value of all pages containing the command in order to obtain a sum of exclusive disjunctive relation; convert the sum of exclusive disjunctive relation into decimal values to obtain a calculated verification value; and comparing the calculated verification value with a verification term contained in the page containing another command. 19. In or for a cellular mobile radiotelephone system (CMR) that has a series of cells, a data message system to communicate selected data collected from P1383 / 99 X a series of remote data sources, wherein said data message system comprises: a series of data reporting devices, each of which serves to monitor a corresponding source of said remote data sources to obtain said selected data and for transmitting a data message containing said selected data, said data message being formatted to correspond to an identification signal transmitted by a cellular radiotelephone when said cellular radiotelephone is identified for the first time in said CMR system; a mobile switching center (MSC) for receiving said data message through a cellular network control channel from each of said data reporting devices operating within said coverage areas of said series of cells; and a data collection system for collecting said selected data in response to receipt of said data message from said MSC through a first communication link; said MSC transmits pages through the control channel of the cellular network, in which selected pages contain a data set that forms a part of the data sequence; said data reporting devices also monitor the network control channel P1383 / 99 X cell in search of pages that have a specific identifier assigned to one of the data reporting devices in response to receiving one of the pages that have a predetermined characteristic, said data reporting device monitors the control channel of the cellular network in search of pages containing a command in response to the reception of the page having the specific identifier, and in response to the reception of a predetermined number of pages containing the command, and said selected data reporting device is also responsible for accepting the data set of each predetermined number of pages in order to form a joint data message containing the data sequence. The system of claim 19, wherein the selected data reporting device monitors the FOCC for one of the pages containing a corresponding command for a verification action in response to receipt of the predetermined number of pages, verifies that the data sequence of the data message set in response to the receipt of the verification page, and processes the data sequence according to the command in response to the verification of the data sequence 21. The system of claim 20, in P1383 / 99MX where the selected data reporting device discards the data in case (1) a check value from another command page does not match a calculated check term with the combined data from the data stream or (2) the page Verification command is not received within a certain predetermined time period. 22. The system of claim 20, wherein the selected data reporting device discards the data in case a period of time between any pair of received command pages exceeds a certain maximum period of time. The system of claim 20, wherein the selected data reporting device discards the data in response to receiving more than a predetermined number of pages containing the command while monitoring the control channel of the cellular network. The system of claim 20, wherein the page having the predetermined characteristic is formatted to represent at least a portion of a telephone number (MIN) for the CMR system; and the page containing the command is formatted to represent a telephone number having a plurality of digits, certain digits of the telephone number represent the characteristic P1383 / 99MX By default, other digits of the phone number represent data values and a remaining digit of the phone number identifies the action associated with the command. • P1383 / 99MX SUMMARY A system for communicating page messages or multiple pages through a forward air control channel (FOCC) of the control channel of a cellular network to a receiving device compatible with a cellular device and combining the data received from each received page to form a joint message comprising a sequence of data. A cellular communications device operating in a normal state responds to a page received through the FOCC by comparing the received page with one or more masks stored in its memory. If the received page contains a predetermined characteristic and matches a corresponding mask stored in the receiving device, it responds by going from a normal state to a receiving state of the device identifier. In the device identifier receiving state, the cellular communications device monitors the FOCC in search of a page having a special identifier assigned to said device. Each received page is compared to a mask corresponding to the special identifier and stored in the memory of the selected device. In response to a match, the cellular communications device passes from the status of receiving the identifier P1383 / 99MX from device to a state of data reception and monitors the FOCC in search of pages containing commands. In the data receiving state, the cellular communications device can respond to pages containing commands by accepting data values from each received command page and combining the data values in order to form a data sequence. P1383 / 99 X