WO2003019907A2

WO2003019907A2 - System for defining and maintaining an exclusion area, wherein the usage of cellular telephones is restricted

Info

Publication number: WO2003019907A2
Application number: PCT/BR2002/000117
Authority: WO
Inventors: Carlos Augusto Rabelo
Original assignee: Carlos Augusto Rabelo
Priority date: 2001-08-31
Filing date: 2002-08-19
Publication date: 2003-03-06
Also published as: AU2002331471A1; BR0104684A; WO2003019907A3

Abstract

A system for defining and maintaining an exclusion area (50) is presented, wherein the usage of cellular telephones is restricted, e.g. in a prison. The system comprises a base station and an associated computing system. The base station uses a network of directive antennas (40 to 47) in order to fit the coverage area to the particular exclusion area (50). The computing system performs the task of monitoring the cellular telephones inside the exclusion area (50) and also their entries and exits in and out of the exclusion area (50), respectively. Furthermore, the computing system intercepts all calls originating or terminating in the exclusion area (50) in order to control the usage of the cellular telephones located in said area. The computing system comprises: a first database storing the identities of the cellular telephones actually residing in the exclusion area (50); a second database storing the identities of the cellular telephones that have the permission of unconditionally making and receiving calls inside the exclusion area (50); a third database storing the details of calls completed in said exclusion area (50); and an audible response unit for sending audible messages to the cellular telephones of users inside the exclusion area (50).

Description

Descriptive report referring to an invention patent request for a "SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA". The present invention relates to mobile cellular communication and is concerned with a system to create and maintain an area where the use of cell phones is not permitted to everybody, to be applied, for instance, in prisons. As the electronics progresses, the integrated circuits become smaller and smaller and more efficient; and the cell phones follow this evolution, being currently a global, easy and efficient mean of communication. This seems to bring only advantages but, unfortunately, it also brings some disadvantages as, for example, it favors the criminality. Due to its size, a cell phone can pass unnoticed in a police search and reach the prisoners hands, leading to the use of technology for criminal purposes. Recent facts occurred in Brazil show us how dangerous this improper use of cell phones can be: simultaneous rebellions arose in many prisons of several cities of Sao Paulo State, threatening the community and keeping the police authority in check. Incredibly, the whole prisoners operation was commanded and controlled by means of cell phones. The present invention was conceived as a mean of impeding the improper use of cell phones without affecting other users in the area. The current systems used to create and maintain a cell phone use exclusion area are limited to scramblers (devices to code the speech, insert noises or mix sounds impeding the conversation) or the creation of shadows to avoid the use of cell phones in a certain area covered by one or more Radio Base Stations. These systems, besides not monitoring the exclusion area, are highly inconvenient for being unrestricted, that is, affect both the undesirable users and those who should not to be excluded, as any mobile terminal in the area covered by the Radio Base Station is affected by the exclusion. This makes these systems undesirable, both for the public telecom company and the users improperly affected. The present invention aims at creating a method free from this inconvenience by means of the installation of a directional antenna covering the excluded area as well as a computational system for monitoring the calls completed by cell phones in the mentioned area. This system presents a number of advantages: It does not require alterations in the mobile terminals neither in the Radio Base Stations or the Command & Control Central; it requires only adjustments in its programming, making the system extremely simple to be implemented. It can be easily changed through the parameterization of the proposed computational routines; the proposed Radio Base Station is an ordinary Radio Base Station, with no special features. The system allows the police monitoring of the area, allowing both inclusion and exclusion of users, guiding them when in transit inside the exclusion area, and does not require installation of special equipment in the area to be excluded. The main characteristic of the present invention is that a Radio Base Station is constructed with the antennas directed to the area intended to be excluded and it controls the calls completed by mobile terminals inside the area covered by this Radio Base Station by means of a computational system. The Radio Base Station, with the antenna directed to the area to be controlled, has the objective of delimitating more precisely the area to be excluded in order to avoid at maximum that mobile terminals outside the excluded area are affected by the exclusion. The more precise is this area delimitation, the smallest is the number of mobile terminals not to be excluded that will be affected by the exclusion, consequently reducing the computational work that must be performed to control the mobile terminals not to be excluded. In case of impossibility of constructing this Radio Base Station, one must only control the mobile terminals by means of the computational system. This does not make the system less inclusive, but causes more computational work, due to the need of bigger data load in the database. Conceptually, the system proposed by this patent creates two main types of users: in-transit users and permanent users. The in-transit users are those who are passing by the exclusion area or its proximity. The permanent users are those who spend the greater part of the day inside the exclusion area, for example, persons who live or work on its proximity. As the in-transit users are affected by the exclusion for short periods, they may complete a certain number of calls within predetermined periods. The permanent users must request to the telecom company the cell phone using right inside the exclusion area in order to avoid that third parties are affected by it. The authorization to use cell phones inside the exclusion area must be given only for persons who live or work inside the area, or who have a good reason to request such authorization. Authorization for alien users should not be given. Considering that the Command & Control Central operates by means of a computer, the system proposed in this patent includes computational routines to control both the in-transit and the permanent mobile terminals inside the exclusion area. These routines must allow, or not, the calls to be completed by monitoring the period in which the mobile terminal remains inside the exclusion area and the number of calls completed. The main objectives of these routines are: allowing, or not, the completion of calls by mobile terminals inside the area; monitoring the number of calls completed by the mobile terminals inside the area; monitoring the period in which the mobile terminals remain inside the exclusion area after completing the first call and monitoring the entry and exit of mobile terminals in the exclusion area. This monitoring plus control criteria define the way the mobile terminals are controlled. These criteria must be defined jointly by the police authority and the cellular telephone services carriers, and are mainly the number of calls that can be completed inside the exclusion area and the period of permanence there after completing a first call. The monitoring is performed based on the control signals transmitted by the Command & Control Central as, for example, the "Paging" and the "Registering" signals. The computational system proposed by this patent, by means of these signals, updates and maintains a database that includes all the mobile terminals situated in the exclusion area. This database is constantly updated. For this, it is necessary that the system monitors the mobile terminals entry and exit in the exclusion area, as this is the only way to define the set of mobile terminals situated in the area. The mobile terminals entry in the exclusion area is defined when the first call is completed, through the request of Registering sent by the Command & Control Central every time a mobile terminal starts a call, or by means of a request of search (Paging) that is made every time the Command & Control Central searches a mobile terminal called. At these moments, the computational routines proposed by this patent must be consulted to check whether the call can be completed or not. The mobile terminal exit of the exclusion area is defined by means of periodic paging requests which are started at the moment the mobile terminal enters the exclusion area. If these search commands indicate that the mobile terminal is under other Radio Base Station control than the exclusion area Radio Base Station, this mobile terminal must be removed from the database. This is the evidence that the 1 mobile terminal is no longer in the exclusion area. The persons improperly

2 affected by the exclusion area, neighbors for instance, must request to the cell

3 telephone services carrier authorization to use the mobile terminal inside the

4 mentioned area. These permanent users are special ones and must be

5 informed about the importance of this matter as well as being specially

6 committed to the police authorities. For instance, in case of cell phones loss or

7 theft, the cell telephone services carrier must be immediately informed to take

8 the necessary steps for the exclusion of the privilege of use inside the

9 restricted area. Also, the cell phone cannot be lent, assigned or sold without 0 the cell telephone services carrier previous authorization. These devices are 1 included in a database consulted every time a call involving mobile terminals 2 inside the exclusion area is completed. The mobile terminals included in this 3 database have authorization to operate in the exclusion area. At the moment 4 the user makes a call inside the exclusion area, the system must inform him 5 by means of an Audible Response Unit that he is in an exclusion area, that 6 inside this area only n calls can be made or received and that the maximum 7 time of permanence inside this area as from this first call is of x minutes. For 8 the following calls, the system must inform the user about the number of calls 9 he still can make inside the exclusion area and the remaining time to make 0 them. In the case the user does not want this call to be monitored, he should 1 not complete this first call and wait until he is out of the exclusion area to 2 make new calls. Also, the user who has called must be informed, by means of 3 the Audible Response Unit, that the called terminal is inside an exclusion area, 4 that the user has preferred not to answer the call and that he should try to call 5 him latter. If, even so, the user wants to make the call, this call must be 6 completed but, as from this moment, the mobile terminal or both terminals 7 provided they are inside the exclusion area, start being monitored by the 8 system proposed by this patent. 9 Next, as an example, the system in question is explained in reference to _€ιe figures 1, 2, 3, 4 and 5. 1 The exclusion area (50, figure 4), is physically delimited by an antennas 2 network (40 to 47). These antennas must be directed to the area to be 3 excluded with an increased sensitivity to guarantee that the mobile terminals 4 signals inside the exclusion area are attracted by them and not by other Radio 5 Base Stations antennas near the exclusion area, and must have a rear ground plane (48) to avoid at maximum that the signal of other mobile terminals out of the exclusion area are attracted by them. This area must include as many antennas as needed to define it. The antennas directionality, position and power must be adjusted to delimitate the exclusion area in the most accurate way possible (50). These antennas signals are controlled by a local Control Unit (39), so creating a cell (49). This local Control Unit communicates with the mobile terminals inside the excluded area (50), and with the Command & Control Central, that communicates with all mobile terminals inside the area covered by the cell telephone services carrier. The computational system is compounded of a databank including the exceptions (29, figure 1), a databank including the mobile terminals situated inside the exclusion area (35), a databank with the calls completed inside the exclusion area (33), an audible response (28) and routines unit for the exclusion area control (26, 28, 30, 31, 32, 34 e 37). All the mobile terminals that should not be excluded must be registered in the Exceptions Databank (29), for example, permanent users terminals, as they are used by policemen and neighbors who are being improperly affected. In the Mobile Terminal Inside the Exclusion Area Databank (35) all the mobile terminals being used inside the exclusion area are registered. The Databank of the Calls Completed inside the Exclusion Area (33) includes the register of all the calls completed by the mobile terminals that have been or are inside the exclusion area. The Audible Response Unit (28) guides the users in transit inside the area who want to make or receive calls (50), as well as those who make calls to mobile terminals situated inside the exclusion area (50) or receive calls from mobile terminals situated in the same area. The computational routines (26, 28, 30, 31, 32, 34 and 37) perform, by means of the information included in the databank (35, 33 and 29), the desired control of the information sent by the users (27) and of the information supplied by the Command & Control Central routines (30). As soon as the user starts a call, the Command & Control Central (1) registers the mobile terminal that generated the call (2, figure 2) by means of the registering signal (50). This routine must check if the mobile terminal that originated the call or if the called terminal are inside the exclusion area cell (45). If so, the computational routines proposed in this patent must be consulted to check whether the call can be completed or not. These routines must signal to the Command & Control Central (1) to allow, or not, the call to be completed. Upon receiving an exclusion area Radio Base Station (45) signal of a call generated by a mobile terminal or for a mobile terminal that is inside the exclusion area, this computational system must consult the Exceptions Databank (29) and, if the mobile terminal is included in this database, the call can be normally completed, as the mobile terminals registered in this databank have permission to make calls in the exclusion area. In case the mobile terminal is not registered in the Exceptions Databank (29), the routine must check if such terminal is in the Databank of Mobile Terminals Inside the Exclusion Area (35). If not, it means that this call is the first made by this mobile terminal inside the exclusion area. So, the data about both the mobile terminal and the call must be registered in the Databank of Completed Calls (35). This databank must be consulted for each call completed inside the area; the number of calls generated by the mobile terminal should be incremented as well as the period elapsed between the first and the current calls should be calculated. If the user exceeds the number of calls or the time of permanence authorized as from the first call completed inside the exclusion area, permission to make or receive calls inside the exclusion area must not be given by the system anymore (50). This is informed by means of the Audible Response Unit (28). The control of mobile terminal entries and exits in the exclusion area starts at the first call completed inside it. Aiming at monitoring the mobile terminal exit from the exclusion area, the monitoring routine of the mobile terminal in the area databank (32) must periodically solicit from the Command & Control Central to search the mobile terminal (paging), in order to check if it is no longer inside the exclusion area. During this search, the Command & Control Central returns the number of the cell Radio Base Station where the mobile terminal is and, if the Radio Base Station does not belong to the excluded area, this mobile terminal must be removed from the Databank of Mobile Terminals Inside the Exclusion Area, since it is no longer inside the exclusion area (50). If the mobile terminal is not found, there is nothing to do. These search requests periodicity must be defined based both on the number of mobile terminals situated inside the exclusion area and on the period they can remain there. The number of searches to be made is directly proportional to the number of mobile terminals being used inside the exclusion area and inversely proportional to the searches periodicity. Therefore, this value must be dynamically defined in order to not overloading the system. The periodicity can be too high, for example, 15 minutes. So, the system is not overloaded with searches and it results only in the permanence of the mobile terminals in the databank for a little additional time after they leave the exclusion area (50). This fact does not bring problems to the users as, at the moment they leave the exclusion area, they are no longer under the restrictions imposed by it, because the calls completed out of the exclusion area (50) are not monitored by this system, even so the mobile terminal is registered in the Databank of Mobile Terminals Inside the Exclusion Area. Next, as an example, the flow of the computational routine for mobile terminals monitoring inside the exclusion area (50) is explained in reference to the figures 2 and 4. The figure 4 is a diagram showing the data flow with the following components: Primary process (31), whose objective is to perform the computational monitoring of the mobile terminals inside the exclusion area. This process uses the Command & Control Central computational routines (30), for example, the registering (50) and the paging (3) routines, to check if any mobile terminal is being used inside the exclusion area and to check if any mobile terminal is still there; it reads the exceptions register (29) to check if the mobile terminal has permission to make calls inside the exclusion area; it reads the Databank of Mobile Terminals Inside the Exclusion Area (35) to check if the mobile terminal has already made a call inside the exclusion area, the time of the first call, the number of calls completed and increment such number, if the call is completed; communicates with the Inclusion in the Databank Routine (34) in order to include the mobile terminals in the Mobile Terminals In the Exclusion Area Databank at the first call completed inside the exclusion area, to start the periodical searches and to register the calls completed in the databank (33). The exceptions edition process (26) whose objective is to insert and remove mobile terminals from the Exceptions Databank (29) based on information received by the cell telephone services carrier (25): from users (27) asking the carrier to authorize the use of mobile terminals inside the exclusion area or to cancel such authorization; from the police authority who is authorized to request the canceling of using right of a certain mobile terminal inside the exclusion area; or by the carrier itself who is able to cancel such authorization if the user fails to comply with the rules inside the exclusion area. The Audible Response Unit (ARU) (28), whose objective is to guide the users who are using the mobile terminal inside the exclusion area (50) as well as those who are making calls to mobile terminals situated inside the exclusion area, by means of audible messages, for example: at the first call the user must be informed that he is inside an exclusion area, that only n calls can be made and that the permanence period there is of x minutes. The Command & Control Central routines process (30), using, for example, the paging (3) and registering (2, 50) routines. The Databank of Mobile Terminals Inside the Exclusion Area inclusion routine (34), whose objective is to include the mobile terminals situated inside the area in the appropriate databank as well as to start the temporized routines (10) for mobile terminals periodical search in this databank, as from the first call completed inside the exclusion area. The Databank of Mobile Terminals Inside the Exclusion Area (32) monitoring process, whose objective is perform the monitoring of such databank by means of temporized routines (10) to exclude the mobile terminals that are no longer inside the exclusion area (50) and the police monitoring routine (37), reading the Databank of Mobile Terminals Inside the Exclusion Area (35) and the Databank of Completed Calls (33) to report to the police authorities (36) the calls that were and are being completed, and the mobile terminals situated inside the exclusion area. The following entities: the carrier (25) that is the cell telephone services provider; the users (27) who are the holders of mobile terminals and use the telephony services provided by the carrier (25); and the police authorities (36) who use the police monitoring routine (37). The following databanks: Exceptions Databank (EDB) (29), containing the mobile terminals authorized to make calls inside the exclusion area (50). Databank of Completed Calls (33) (DCC), containing the register of all calls completed and being completed inside the exclusion area (50); and Databank of Mobile Terminals Inside the Exclusion Area (35) (DMTIEA), containing the register of all mobile terminals being used inside the exclusion area (50). The figure 5 is a computational routines flow-chart showing the whole process when a call starts and the Command &. Control Central (1) performs the register of the calling mobile terminal by means of the command "registering" (50) that is sent every time a mobile terminal initiates a call, or by means of a search signal (paging) (3) that is sent when the Command & Control Central searches for the mobile terminal called (49). The system must check if the mobile terminal that initiated the call or the mobile terminal that is being called are in the Radio Base Station cell of the exclusion area (7). If not, the system must signal to the Command & Control Central to complete the call (4) and resume its normal routines (18). If so, the system must check if the mobile terminal is registered in the Exceptions Databank (9). In this case, the system must record the call data in the Databank of Completed Calls (8), signal to the Command & Control Central to complete the call (4) and resume its normal routines (18). If the mobile terminal is not registered in the Exceptions Databank (9), the system must check if this terminal is inside the Databank of Mobile Terminals Inside the Exclusion Area (14). If so, the system checks if the mobile terminal has already reached the maximum authorized number of calls (15). In this case, the system must inform the user by means of an Audible Response Unit (28) that he is still inside the exclusion area, that he has already made the maximum authorized number of calls and that he only can make new calls after leaving the exclusion area (16). Also, the system must signal to the Command & Control Central to not complete the call (5) and to resume its normal routines (18). On the contrary, if the limit of calls has not been reached yet (15), the system must check if the maximum permanence period inside the exclusion area was completed (12). If so, the user must be informed by means of an Audible Response Unit (28) that he has already exceeded the maximum authorized period of permanence inside the exclusion area and that he only can make new calls after leaving the area (13). The system must signal to the Command & Control Central not to complete the call (5) and to resume its normal routines (18). If not, after checking if the maximum permanence period inside the exclusion area was completed (12), the system must increase the number of calls completed inside the exclusion area and record it in Databank of Mobile Terminals Inside the Exclusion Area (11), inform the user about the number of calls and the remaining period to make calls inside the exclusion area (51), record the call data in the Databank of Completed Calls (8), signal to the Command & Control Central to complete the call (4) and resume its normal routines (8). If the answer is no, after checking if the mobile terminal is inside the Databank of Mobile Terminals Inside the Exclusion Area (14) it means that this is the first call inside the exclusion area (50). So, the user must be informed by the Audible Response Unit (28) that he is inside an exclusion area, that only n calls are authorized, that this is the first call and that, as from this call on, the mobile terminal maximum period of use inside the area is of x minutes (51). After that, the system must include this mobile terminal in the respective databank (52) and create a temporized routine (17) to check periodically if the mobile terminal is inside the exclusion area. There is one temporized routine for each mobile terminal inside the exclusion area and these routines are not synchronized, that is, each routine calls the monitoring routine of the Databank of Mobile Terminals Inside the Exclusion Area (6) at different moments. This timing depends exclusively on the moment in which the temporized routine was created as the searches will be periodically performed as from this moment. At predetermined periods, the Databank of Mobile Terminals Inside the Exclusion Area monitoring routine (6) must ask to the Command & Control Central (1) to perform a search (paging) of the referred mobile terminal and if, as a result, there is an indication that the mobile terminal in a different cell from that which defines the exclusion area, this mobile terminal must be removed from the Databank of Mobile Terminals Inside the Exclusion Area (35), since this is a confirmation that it is no longer inside the exclusion area. This mobile terminal temporized routine (10) must be removed as it will not be used anymore. The figure 5 details the monitoring routine of the Databank of Mobile Terminals Inside the Exclusion Area (6). Periodically, the mobile terminals temporized routines (10) must call the monitoring routines (10) of the Databank of Mobile Terminals Inside the Exclusion Area (6) that must request the search (paging) (19) to the Command & Control Central (1), that will inform whether the referred mobile terminal was found, or not, and, if it has found it, it must inform under which Radio Base Station control it is. Therefore, the system must check if the referred mobile terminal was found (20). If not, it means that the terminal may be turned off or out of the Command & Control Central operational area. In this case, there is nothing to do and the routine must be finished (24). If the mobile terminal was found, the routine must check if the cell Radio Base Station is that of the exclusion area (21). If so, the routine must be finished (24) as the mobile terminal is still inside the exclusion area (50). If not, the routine must remove the referred terminal from the respective databank (22) and exclude the temporized routine from the mobile terminal (23) as in this case it is useless, considering the confirmation that the mobile terminal is no longer inside the exclusion area. So, the monitoring routine is finished (24). In case the user turns off the mobile terminal inside the exclusion area (50) after making a call, it will remain in the Databank of Mobile Terminals Inside the Exclusion Area (35) and, when the maintenance routine of the databank (6) asks the Command & Control Central to perform a search for this mobile terminal and it is still turned off, the routine will inform that the terminal has not been found and the terminal will remain in the Databank of Mobile Terminals Inside the Exclusion Area (35) up to it is turned on and is out of the exclusion area (50). The cell Hand-over and Hand-off processes can be performed normally, without this system intervention. In the Hand-over, as the call has been initiated out from the exclusion area (50), this monitoring is unnecessary. Nevertheless, the calls generated by this mobile terminal inside the exclusion area will be monitored. In the Hand-off process, as the call has been initiated inside the exclusion area, the permanence parameters have not been exceeded and, as the mobile terminal is leaving the exclusion area, the monitoring is not necessary any more. The figure 5 presents an alternative to avoid the searches for the mobile terminals inside the exclusion area. The monitoring routine of the Databank of Mobile Terminals Inside the Exclusion Area (6), the temporized routines (10) and the routine for creation of temporized routines (17) can be excluded and, in order to check if the mobile terminal is out of the exclusion area, the system must, after checking the Radio Base Station where the mobile terminal is (7, figure 2), check if the mobile terminal is in the Databank of Mobile Terminals Inside the Exclusion Area (51) and, if so, the system must remove this mobile terminal from the databank (52), as it is no longer inside the exclusion area. This alternative presents the inconvenience of having to wait that the user makes another call after leaving the exclusion area, to check if he is still there, causing an unnecessary loading of mobile terminals in the databank (35) and, also, an additional search in this databank for each call from the central, besides affecting the police monitoring process (37) which, in this case, cannot be used to check the mobile terminals inside the exclusion area, since many mobile terminals supposed by the system to be inside the exclusion area for still being in the databank (35), actually would not be there. In spite of the described system being the preferable configuration of the invention, changes can be made provided its conception is not altered, and some of its computational routines or Radio Base Station components are replaced with others technically compatible, particularly the routines used by the Command & Control Central that could be other than those of Paging or Registering, and the moment in which this patent routines are called, that also can be other than that of the call initialing and search of the mobile terminal called.

Claims

CLAIMS: 1 -"SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by a computational system and directional antennas. 2 -"SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by a computational system and directional antennas, as per Claim 1, characterized by a computational system that performs the monitoring of mobile terminals inside the exclusion area. 3 - "SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by a computational system and directional antennas, as per Claim 1, characterized by directional antennas that define physically the area to be excluded. 4 - "SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by a computational system and directional antennas, as per Claim 1, characterized by the fact that the antennas have a rear ground plane to avoid at maximum that the signal of other mobile terminals out of the exclusion area are attracted by them. 5 "SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by computational routines and directional antennas, as per Claim 1, characterized by a computational system which uses the Command & Control Central computational routines. 6 -"SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by computational routines and directional antennas, as per Claim 2, characterized by a computational system which performs the monitoring of mobile terminals entry into the exclusion area. 7 - "SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by computational routines and directional antennas, as per Claim 2, characterized by a computational system which performs the monitoring of mobile terminals exit from the exclusion area. 8 - "SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by computational routines and directional antennas, as per Claim 2, characterized by a computational system which performs the monitoring of the number of calls generated by mobile terminals inside exclusion area. 9 - "SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by computational routines and directional antennas, as per Claim 2, characterized by a computational system which performs the monitoring of the mobile terminals permanence period inside the exclusion area. 10 - "SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by computational routines and directional antennas, characterized by having a databank in which all the mobile terminals situated inside the exclusion area are registered. 11 - "SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by computational routines and directional antennas, characterized by having a databank in which all the mobile terminals that should not be affected by the exclusion are registered. 12 - "SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by computational routines and directional antennas, characterized by having a databank in which all the calls completed inside the exclusion area are registered. 13 - "SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by computational routines and directional antennas, as per Claim 5, characterized by using periodically and asynchronously the Command & Control Central search routine (Paging) to check if the registered mobile terminals are still inside the exclusion area. 14 - "SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by computational routines and directional antennas, as per Claim 5, characterized by using the Command & Control Central register routine (Registering) to check if a mobile terminal initiates a call inside the exclusion area. 15 - "SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by computational routines and directional antennas, as per Claim 5, characterized by using the Command & Control Central search routine (Paging) to check if the mobile terminal being called is inside the exclusion area. 16 - "SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by computational routines and directional antennas, characterized by sending audible messages to the users, informing about the calls and guiding them about mandatory procedures inside the exclusion area. 17 - "SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by computational routines and directional antennas, characterized by allowing the monitoring of the mobile terminals as well as the calls completed inside the exclusion area, for policing purposes. 18 - "SYSTEM FOR CREATING AND MAINTAINING OF A CELL PHONE USE EXCLUSION AREA", constituted by computational routines and directional antennas, characterized by signaling to the Command & Control Central to complete, or not, a call.