MXPA02002290A - System and method for transmitting subscriber data in a narrowband advanced messaging system using unscheduled message time slots - Google Patents

Abstract

There is disclosed, for use in a narrowband wireless messaging network (100), a subscriber communication unit (124) that uses a miscellaneous ALOHA message to transmit predefined messages and or formatted telemetry data to a base tension. The subscriber communication unit (124) comprises a transceiver (225) for receiving messages from the base station (112) in a forward channel and transmitting messages to the base station (112) in a reverse channel. The reverse channel is divided into a plurality of scheduled transmission time slots and a plurality of unscheduled transmission time slots of the ALOHA type. A message controller (210) receives input data generated by the subscriber communication unit (124) and translates the input data into a reverse channel message capable of being transmitted in an available unscheduled time slot, such as a miscellaneous ALOHA message time slot.

Description

SYSTEM AND METHOD FOR TRANSMITTING DATA OF THE SUBSCRIBER IN A SYSTEM OF MESSAGE TRANSMISSION, ADVANCED, NARROW BAND, THAT USES TIME INTERVALS FOR MESSAGES, NOT SCHEDULED TECHNICAL FIELD OF THE INVENTION The present invention is directed, in general, to wireless communication systems and the methods of operation thereof and, in particular, to systems and methods for transmission messages in a narrowband, wireless message transmission network.

BACKGROUND OF THE INVENTION 15 The demand for wireless communication equipment services, better and more economical, continues to grow at an accelerated rate. Much of this development is encouraged by the approval of the Federal Communications Commission ("FCC"), for its acronyms in English) of certain frequency bands for the following generation of devices for Personal Communication Service ("PCS") that provides advanced voice and / or data message transmission services, as well as telephone voice services. A relatively small portion of the available frequency bands was discarded so that narrowband PCS ("NPCS") encourages the efficient use of available spectrum.

There are several well known wireless communication techniques that try to maximize the efficiency with which the available spectrum is used. These methods include multiple frequency division access ("FDMA"), multiple division access. of time ("TDMA"), multiple access by division of code ("CDMA"). The term "multiple access" means that multiple subscribers (or users) are able to communicate simultaneously with each of these systems. In general, the infrastructure of a message transmission system is somewhat different from cellular telephone systems. For example, in an NPCS message transmission system, all the transmitters of the base station over a wide coverage area are synchronized and broadcast simultaneously (ie, simulcasting) a message in a direct channel to a unit of communication. subscriber communication, wireless (for example, portable message locators, fixed message or telemetry transmission devices, etc.).

This simultaneous diffusion increases the probability that the transmitted message will reach the device even if there are obstacles! such as for example, buildings, trees, overpasses and the like Likewise, the subscriber's communication units are capable of transmitting messages in a reverse channel to many receivers associated with the base stations, however, the message transmission system it does not assign the subscriber to a particular cell and does not transmit the subscriber in only one cell, as in the case of a cellular telephone system. Widely exposed telemetry systems are communication systems that transmit "state" information from a remote process, function or device (collectively, the "telemetri.a application") to a central control facility. Telemetry systems can be used in place of maintenance workers to remotely monitor a certain telemetry application, such as, for example, a utility meter, security system, vehicle locator, environmental monitoring, vending machine, medical equipment, equipment for drilling oil wells and the like. Wireless bidirectional message transmission systems are often implemented using a reverse channel that is divided into a number of unscheduled transmission time slots and a number of unscheduled transmission time slots (known as ALOHA intervals). A subscriber communication unit, such as for example a telemetry device or a bidirectional locator, uses an unscheduled ALOHA message to request and / or schedule the transmission of a data message to a base station of the wireless network, using one or more of the inte Message time, programmed, subsiguing: es. The use of ALOHA messages allows the subscriber's communication unit to initiate the data transmission to the wireless network when a programmed time interval has not been assigned beforehand. After a programmed transmission interval is assigned, the subscriber's communication unit transmits the corresponding data in the reverse channel during the programmed time interval. However, this is a very structured communication protocol that uses a considerable amount of the available bandwidth. In a narrow-band wireless message transmission system, in particular a telemetry system, it is decisive that bandwidth is retained. There is a reward in utilizing the available bandwidth as efficiently as possible. , there is a need in the art for an improved wireless message transmission network that minimizes the need for bandwidth to transmit data from a subscriber communication unit to a base station. In particular, there is a need for a Enhanced wireless message protocol that allows a subscriber communication unit, such as a telemetry device, to transmit messages to a base station in a narrowband PCS environment with a minimum amount of protocol overload.SUMMARY OF THE INVENTION To address the deficiencies discussed above of the prior art, a main objective of the present invention is to provide, for use in a narrowband, wireless message transmission network, a subscriber communication unit comprising: ) a transceiver capable of receiving messages from a base station in a direct channel and transmitting messages to the base station in a reverse channel, wherein the reverse channel is divided into a plurality of scheduled, transmission time slots and a plurality of transmission time intervals, not programmed, of the ALOHA type; and 2) a message controller capable of receiving input data generated by the subscriber's communication unit and translating the input data into a reverse channel message capable of being transmitted in one of the unscheduled time slots. In one embodiment of the present invention, the reverse channel message is a heterogeneous ALOHA message. In another embodiment of the present invention, the message controller translates the input data into one of the predefined messages N Still in another embodiment of the present invention, the input data is generated by a subscriber using manual controls to select one of the predefined messages N Still in another embodiment of the present invention, the predefined messages N are stored in a look-up table (LUT) associated with the message handler. In a further embodiment of the present invention, the predefined messages N are modified by the subscriber. In yet another embodiment of the present invention, the data comprises measured data received from the monitored equipment associated with the subscriber's communication unit and the message controller translates at least one of the data measured in the reverse channel message. Still in another mode of the present invention, the message controller allocates the measured data in one or more data fields in the reverse channel message. The foregoing has preferably designated the features and technical advantages of the present invention in such a way that: The technique may better understand the following description of the inventor of the invention. The additional features and advantages of the invention will be described hereafter so as to form the subject of the claims of the invention. Those skilled in the art should appreciate that they can readily utilize the conception and specific embodiment set forth as a basis for modifying or designating other structures to accomplish the same purposes of the present invention. Those skilled in the art should also perform this in such a way that the equivalent constructions do not deviate from the spirit and scope of the invention in its broadest form. Before analyzing the DETAILED DESCRIPTION, it may be advantageous to state the definitions of certain words and phrases. used throughout this patent document: the terms "include" and "comprise", as well as the derivatives thereof, signify inclusion without limitation; the term "or" is inclusive, what it means and / or; the phrases "associated with" and "associated with it," as well as the derivatives thereof, may mean including, being included within, interconnecting with, containing, being contained within, connecting to or with, making contact with or with, being communicable with, cooperate with, intersperse, juxtapose, be close to, be linked to or with, have, have a property of, or the like; and the term "controller" means any device, system or part of the same that controls at least one operation, this device can be implemented in hardware, firmware or software, or some combination of at least two of them. It should be noted that the functionality associated with any particular controller can be centralized or distributed, either locally or remotely. The definitions for certain words and phrases are provided throughout this patent document; those with normal experience in this field should understand that in any, if not in most cases, these definitions apply to previous uses, as well as to the future ones of these defined words and phrases.

BRIEF DESCRIPTION OF THE DRAWINGS For a more complete understanding of the present invention, and the advantages thereof, reference is now made to the following descriptions taken together with the accompanying drawings, in which similar numbers designate similar objects, and in which: Figure 1 illustrates a representative portion of an exemplary message transmission network according to an embodiment of the invention; Figure 2 illustrates a block diagram of the subscriber communication unit, for example, for use in the network of Figure 1 according to an embodiment of the present invention; Figures 3? and 3B illustrate example formats for predefined and defined telemetry 11-bit messages according to one embodiment of the present invention, Figure 4 illustrates a portion of an exemplary control facility for use in the network of Figure 1 according to with one embodiment of the present invention; and Figure 5 illustrates a flow chart for an example message transmission network according to an embodiment of the present invention.

DESCRIPTION OF THE INVENTION Figures 1 to 5, set forth below, and the various modalities used to describe the principles of the present invention in this patent document are presented by way of illustration only and should not be construed in any way to limit the scope of the invention. Those skilled in the art will understand that the principles of the present invention can be implemented in any wireless message transmission network, suitably arranged. Returning initially to Figure 1, a representative portion of a conventional message transmission network (generally designated "100" and referred to below as "network 100") is illustrated. The network 100 provides bidirectional data messages for the subscribers (or users) of the network 100. The network 100 is represented by three example fixed terrestrial sites, called base stations, which communicate with a plurality of subscriber communication units 121 -128 (eg, paging beacons for message transmission, telemetry devices, PCS devices, personal data assistants, or other processing systems including wireless communication capability, etc.) within the network 100. The base stations 111, 112 and 113, each marked "BS" in Figure 1, have coverage areas 101, 102 and 103, respectively, which are determined by the power of the transmitters in the base stations 111 112 and 113 and by the characteristics of their associated antennas. For purposes of illustration and analysis, coverage areas 101, 102 and 103 are shown as circles. However, in real world environments, each of the coverage areas 101, 102 and 103 may differ significantly from an idealized circular form.

For purposes of illustration, a plurality of subscriber communication units, each marked "P" in Figure 1, are shown scattered along the message transmission network 100. The communication units of the subscriber 121 and 122 are located within the coverage area 101 and can make contact in the bidirectional message transmission with the base station 111. The communication units of the subscriber 123 and 124 are located in the coverage area 102 and can make contact in the bidirectional message transmission with the base station 112. The subscriber communication units 126, 127 and 128 are located in the coverage area 103 and can make contact in the bidirectional message transmission with the base station 113. The subscriber communication unit 125 is located in the coverage areas 102 and 103 and can make contact in bidirectional message transmission with the base stations 112 and 112. In an NPCS environment, the stations b Sept 111, 112 and 113 transmit signals in a direct channel, such as from 939-940 MHZ, for example. The base stations 111, 112 and 113 receive the signals in a reverse channel in, for example, 901-902 MHz. Each base station is effectively a transceiver that contains a transmitter and a receiver to carry out bidirectional communications. Each subscriber communication unit receives direct channel messages directed to lc. same on a selected frequency within the direct channel. Each communication also transmits reverse channel messages on a selected frequency within the reverse channel. The message transmission network 100 can be, for example, a bidirectional wireless message transmission system, compatible with the MOTOROLA® transport protocol, ReFLEXMR. The ReFLEXMR protocol can be used to send a message to a subscriber communication unit. The subscriber communication unit can then transmit in the reverse channel an automatic acknowledgment message that does not require action by the subscriber. Alternatively, the ReFLEX protocol, "M * can be used in an improved message transmission mode to send a more complex message to the subscriber's communication unit." The subscriber's communication unit can then transmit in the reverse channel a automatic recognition message that does not require action by the subscriber.Shortly thereafter, the subscriber can transmit a stored message "preset" in the communication unit >n of the subscriber, such as for example "I'll call you later", or a single message composed of the subscriber using a keypad in the subscriber's communication unit. The base station 111 transmits messages to the subscriber communication units in the area < of coverage 101. The base station 112 transmits messages to the subscriber's communication units in the coverage area 102. The base station 113 transmits messages to the subscriber's communication units in the coverage area 103. The base stations 111, 112 and 113 may be associated with each other and with a control facility 10 by a wired structure, such as for example a private fiber optic network. In alternative embodiments, the base stations 111, 112 and 113 may be associated with each other and for the control facility 10 via a satellite communication link, such as through a very small aperture terminal ("VSAT", for its acronym in English) . It should be noted that while the illustrated embodiment exposes the centralized control installation 10 for controlling communication between the communication units of the example subscriber, in alternative advantageous embodiments, the communication control can be distributed. It should also be noted that messages can be received at the control facility 10 from a variety of sources. Some messages can be received from a public telephone system in the form of repeat calls. simple, entered by a caller on a DTMF keyboard. Other messages can be received by installing control 10 from an Internet connection. Additionally, and more importantly in the context of the present invention, the messages can be received from the subscriber's communication units, such as, for example, the telemetry devices in the field Returning to 1 a Figure 2, illustrated a block diagram of one of the communication units of the example subscriber 121-128 for use in the network 100. The subscriber communication unit 124 may be a bidirectional location device used by a subscriber or may be part of a telemetry device that is used to transmit to the network 100 measured data, status messages, alarm messages and the like, from the monitored equipment owned by a subscriber. The monitored equipment may comprise a vending machine, medical equipment, a domestic alarm system, a remote oil field equipment, a remote power generation equipment and the like, and the subscriber communication unit 124 may be on the outside of the monitored equipment or can be integrated into it The subscriber communication unit (SCU) 124, for example, comprises a manual user input device 205, a message controller 210, a telemetry interface 215 of the monitored equipment , a user screen 220, a transceiver 225 and a memory 230. The manual user input device 205 comprises means for selecting the subscriber and inputting data to the SCU 124. The input means vary from a selected, limited group. of input devices, such as, for example, dedicated buttons, through an alphanumeric keyboard with a full range of function keys, such as for example, scroll, tab, etc. The message controller 210 accepts input from the manual user input device 205 and transfers the data to / from other elements of the SCU 124, as shown. The message controller 210 also controls the execution of the wireless transmission functions of standard messages between the network 100 and the SCU 124, as well as improving the utilization of available bandwidth through the transmission of data in time intervals. of messages, not programmed, in accordance with the principles of the present invention. The telemetry interface 215 of the monitored equipment accepts telemetry data from the monitored equipment and transfers this data to the message controller 210 for further processing and transfer to the external components of the communication network 100, such as for example the base station 112 and the control installation 10. The telemetry interface 215 of the monitored equipment can also accept inputs from the message controller 210 for control of state displays associated with the monitored equipment or as required to coordinate the transfer of the telemetry monitoring information The user screen 220 displays the data processed by the message controller 220, including but not limited to: incoming data of the network, data entered or selected manually, data of telemetry applicable etc. . In one embodiment, the user screen 220 may comprise a more extensive alphanumeric screen for displaying a larger incoming length and locally generate predefined status messages and telemetry messages. The transceiver 215 receives direct channel messages from the network 10C and transmits the reverse channel messages to the mSEMA, through the base station 112 the control installation 10 The transceiver 215 reduces 1 to the frequency of the messages of the direct channel reci and transfers them to the message controller 210. The transceiver 215 also receives the reverse channel messages from the message controller 210 and increases the frequency for the RF signals for transmission to the base station 112. The memory 120 provides storage for data received from the message controller 210. In one embodiment, the memory 120 may temporarily store keyboard data that provides the ability to slide through the contents of the stored predefined messages, an index or encoded pointer to a predefined outgoing message, a keyboard or other manually generated entries that represent the data that will be sent direct to network 100, telemetry data from the telemetry interface of the monitored equipment and the like. The memory 120 may also provide non-volatile memory for the storage of the data entered by keyboard or other manuals to be used in the configuration of the SCU 124 and for the storage of the messages of the predefined look-up table (LUT) and associated pointers to be sent to the 100 network, and the like. In one embodiment, the memory 230 is divided into areas for storing the specific information, for example, the message query table (LUT) 235 provides storage for the predefined messages, marked Message I-Message N. Each of the Message I- Message N comprises a predefined text field that is exhifed to the subscriber and a corresponding translated message field consisting of, for example, 11 bits or less that is inserted into the heterogeneous ALOHA field and transmitted to the base station 112. The table of telemetry data 240 provides storage for various telemetry parameters, marked Parameter I-Parameter M, received from the telemetry interface 215 of the monitored equipment. The parameters include alarm messages, status messages, measured data and the like. The message handler 210 may translate the individual parameters into ALOHA messages of 11 bits (or less) or may combine two or more parameters in ALOHA messages of 11 bits (or less). If the SCU 124 is, for example, a bidirectional pager or other manually operated wireless message transmission device, the message handler 210 receives the manually generated entries by the sequential display of the predefined messages stored in the message LUT 235. In response, the message handler 210 transfers the first predefined messages to the user's screen 220 so that they are observed by the subscriber. The message controller 210 subsequently monitors the manual user input 205 for indications of a request to display the next predefined message or to transmit the predefined message currently displayed to the base station 112. In response to user commands from the user input manual 205, e1 message controller 210 continues to subsequently display the predefined messages from the message LUT 235 until one is selected or the user leaves. When a predefined message is finally selected, the message handler 210 translates the selected predefined message into an ALOHA message, as described further below for transmission to the base station 112 in a non-scheduled message time interval (i.e. , the heterogeneous time interval ALOHA) through the transceiver 225. In a telemetry application, the message controller 210 receives telemetry data from the telemetry interface215 of the monitored equipment or retrieves the telemetry previously stored in the memory 230 and translates this data into the parametric format required to be sent to the network 10 at one or more unscheduled message time intervals. For example, the message controller 210, together with the telemetry data 240 and the transceiver 225, can transfer one or more telemetry parameters in one or more 11-bit ALOHA heterogeneous time slots. Figures 3A and 3B provide high-level illustrations of reverse channel messages, for example, to transfer the identification codes of the subscriber's communication unit (subscriber unit IDs) in addition to a predefined message or telemetry data. in ALOHA heterogeneous, unscheduled time intervals. The predefined message 310 comprises the subscriber unit ID 305 and, for example, a predefined message 11-bit (or less). The subscriber unit ID 305 comprises a standard field for the identification of the subscriber communication unit 124 and may also include a destination field if the SCU 124 is capable of sending messages to a plurality of destinations, instead of to a dedicated terminal user device. The example predefined message 310 is an 11-bit (or less) message that is transferred in the heterogeneous, unscheduled ALOHA time slot associated with the reverse channel transmission of the subscriber's unit ID 305. In a mode , the predefined message 310 comprises an 11-bit code that serves as a pointer or index for a specific predefined message, this code is entered either directly or as an abbreviation through a handwriting device or through means of movement and selection, as described above In another embodiment, the predefined message 310 may comprise 11 data bits that directly represent the data that will be transferred displayed, without the use of translation processes, this data is again entered through a keyboard or other manual input device. The predefined messages can be the same across the network, can be defined specifically by associated or subscriber groups, can be defined only by two communication subscribers, or combinations of these configurations When the predefined message 310 represents a pointer, the control installation 10 and / or a destination end-user device uses the pointer to identify a location in an associated message look-up table (LUT), with the location of the associated table that provides the predefined message to the numeric or the like to transfer it to a screen! the one of the associated user. In an example mode the predefined message 310 may be in the form of a binary code, serving as a pointer to one of a maximum of 2048 different predefined messages. As an example, "know me" and "call me" may be pre-defined messages with codes fixed binaries that are common throughout network 100. "Domestic alarm is ON" can be a message created by a group of associated subscribers, such as, for example, family members, in order to alert them to a situation In one embodiment, the message LUT can be divided to suit a group of common extensive network personnel and / or predefined telemetry messages In a telemetry application, the telemetry message 350 comprises the unit ID of the telemetry unit. subscriber 355 and, for example, an 11-bit telemetry data field (or less) that is transmitted in the unscheduled "heterogeneous" ALOHA message time interval. The subscriber may be associated with specific telenetry devices and an individual destination device that is to receive the same telemetry messages. For this mode, the subscriber unit ID 355 can only comprise the address of the SCU 124, a destination address is not needed. The ccoonnttrrooll iinnssttaallaacciióonn 10 recognizes that the subscriber unit ID 355 corresponds to the SCU 124 and sends the telemetry message to a single end user monitoring station associated with the SCU 124. For example, if the SCU 124 is part of a domestic alarm system, the control facility can transfer the telemetry data to the network of alarm monitoring service providers. The exemplary 11-bit telemetry message 360 can be divided: .r into a plurality of subfields, such as for example four variably sized segments, marked as Fl up to F4. The code associated with each segment of the example message 360 can directly transport the particular telemetry information. For example, Fl may indicate that an alarm is ON, F2 may indicate that the gas pressure is too high, too low or acceptable, F3 may indicate that the temperature is within tolerance or is out of tolerance and F4 may indicate a amount of paper in a selling machine. Figure 4 is μn block diagram of the control installation 1G > of example. The control installation 10 comprises a message controller 405 and a memory 410, which stores the look-up table (LUT) 415 of predefined messages, the table 420 for translation of telemetry data and the table 425 for sending ALOHA messages. The message controller 405 transfers the data to and from the subscriber's communication units via the base stations. The message driver 405 may also comprise means for exchanging data with end users and end-user devices through the public switched telephone network (PSTN) or through another wireless communications network. . The message handler 405 transfers the incoming data par? a temporary storage in the memory 410 and further interconnects with the segments of the memory circuit 410 to obtain the appropriate destination addresses for the communication units of the identified subscriber. In another embodiment, the message controller 405 can also be interconnected with the memory 410 to obtain the conversion information required for the predefined messages based on ALOHA and telemetry. of example messages 405, receives ALOHA messages from the base stations and converts these messages, as required, for the subsequent sending to the communication units of the identified subscriber, through the interconnection base stations or towards the end user to through the PSTN or other wireless means. In one embodiment, the message controller 405 handles the ID of the received subscriber unit, such as for example 300 or 355, as a pointer to its associated subscriber communication unit addresses, for network 100 or for its PSTN or other wireless destination address The message handler 405 identifies the content of the predefined message with the ALOHA base selected by using the contents of the predefined message 310 as a pointer to an associated text message in the LUT 41 5 of predefined messages Subsequently, the message handler 405 causes the predefined message text from the LUT 415 of predefined messages to be transferred to the destination device, such as for example a message locator, receiver, a network server, a PC, a fax machine or what it was before. In a telemetry application, the 405 messaging controller can directly transfer the received ALOHA telemetry message to the designated end user for a subsequent translation and display, it can handle segments of the ALOHA 360 telemetry text as pointers for translation table 420 of telemetry data. In the latter case, the message controller 405 may cause the identified telemetry data to be transferred to the designated destinations. Figure 5 is a flowchart of an example process whereby the example network 100 uses time intervals of ALOHA messages, unscheduled, for the transfer of the subscriber data, The SCU 124 determines whether a subscriber has selected a message for output or whether the data has been received from an associated telemetry interface (process step 505). Depending on the type of message selected, the SCU 124 can translate the message generated or selected from the subscriber from the user's input device 205, manually, for a predefined 11-bit message or can translate the received telemetry data into one or more fields of data of varying length or a pointer to specific telemetry parameters to be sent as one or more messages of 11a (step of process 510). Once the desired message has been formatted, the SCU 124 transmits its subscriber unit ID, possibly including a field for the destination address and the 11-bit heterogeneous ALOHA message (process step 515). Subsequently, the control installation 10 receives the subscriber's unit ID and the heterogeneous ALOHA message from a receiving base station and temporarily stores these messages. The control facility 10 identifies the end user destination and the type of messages from the ID field of the unit of the received subscriber, The control facility 10 uses the ID of the subscriber unit to determine whether the message type is a predefined message or telemetry data (step of process 520). When a predefined message is identified, the control facility 10 translates and / or sends the text of the pre-defined message to the designated subscriber's communication unit, or other end-user device for display. When a telemetry message is identified, the control installation 10 translates and / or sends the telemetry message to the designated telemetry monitoring facility ¡(process step 525.

Claims (23)

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. For use in a narrowband, wireless message transmission network, A subscriber communication unit comprises: a transceiver capable of receiving messages from a base station in a direct channel and of transmitting messages to the base station in a reverse channel, wherein the reverse channel is divided into a plurality of time intervals of transmission, programmed, and a plurality of non-programmed transmission time intervals, of the ALOHA type; and a message controller capable of receiving input data generated by the subscriber's communication unit and translating this input data into a reverse channel message capable of being transmitted in one of the unscheduled, available time slots 2. The unit of the subscriber communication according to claim 1, wherein the reverse channel message is a heterogeneous ALOHA message 3. The subscriber communication unit according to claim, wherein the message controller translates the input data into one of the predefined messages N, 4. The subscriber communication unit according to claim 3, wherein the input data is generated for a subscriber using manual controls to select one of the predefined messages N 5. The subscriber communication unit according to the claim 3, where the predefined messages N are stored in a look-up table LUT) associated with the message handler. 6. The subscriber communication unit according to claim 5, wherein the predefined messages N can be modified by the subscriber. 7. The subscriber communication unit according to claim 1, wherein the input data comprises measured data received from the monitored equipment associated with the subscriber's communication unit and the message controller translates at least one of the data measured in the reverse channel message. 8. The subscriber communication unit according to claim 7, wherein the message controller allocates the measured data in one or more data fields in message d? reverse channel. 9. A narrowband wireless message transmission network comprises: a plurality of base stations capable of transmitting messages in a direct channel to a plurality of subscriber communication units and receiving messages in a reverse channel therefrom, in where the inverse car is divided into a plurality of interval > s of transmission time, programmed and a plurality of unprogrammed transmission time intervals of the ALOHA type; and a message controller capable of receiving an incoming message in one of the unscheduled transmission time slots from one of the plurality of base stations and the translation data contained in the incoming message in at least one of: 1 ) one of the predefined messages N; and 2) measured data received from the monitored equipment associated with at least one of the plurality of non-scheduled transmission time intervals. 10. The narrow-band wireless message transmission network according to the claim 9, where the incoming message is a heterogeneous ALOHA message. 11. The narrow-band wireless message transmission network according to the claim 9, wherein one of the predefined messages N is selected by a subscriber using manual controls associated with one of the plurality of communication units of the subscriber. The narrowband, wireless message transmission network according to claim 11, wherein the predefined messages N are stored in a look-up table (LUT) associated with the message handler. 13. The narrow-band wireless message transmission network according to the claim 12, wherein the predefined messages N can be modified by the subscriber. The narrowband, wireless message transmission network according to claim 9, wherein the measured data is formatted in a plurality of fields defined in the incoming message. 15. The narrowband, wireless message transmission network according to claim 9, wherein the message controller determines whether the incoming message is u.io of: 1) one of the predefined messages N; and 2) data measured according to a communication ID data of the subscriber associated with the incoming message. 16. For use in a narrowband wireless message transmission network, comprising a plurality of base stations capable of transiting messages in a direct channel to a plurality of subscriber communication units, and receiving messages in a reverse channel from there, wherein the reverse channel is divided into a plurality of programmed transmission time slots, and a plurality of unscheduled transmission time slots of the ALOHA type, a method for communicating subscriber data from a first The subscriber's communication unit comprises the steps of: receiving input data generated by the subscriber's communication unit; and translating the input data into a reverse channel message capable of being transmitted in one of the unscheduled time slots available. The method according to claim 16, wherein the reverse channel message is a heterogeneous ALOHA message. The method according to claim 16, wherein the translation step translates the input data into one of the predefined messages N. 19. The method according to claim 18, wherein the input data is generated by a subscriber selecting one of the predefined messages N. 20. The method according to claim 18, wherein the predefined messages N are stored in a look-up table (LUT) 21. The method according to claim 20, wherein the predefined messages N they can be modified by the subscriber. 22. The method according to claim 16, wherein the input data comprises measured data received from the monitored equipment and the translation step translates at least one of the data measured in the reverse channel message. The method according to claim 22, wherein the translation step comprises the step of assigning the measured data in one or more data fields in the reverse channel message.