KR100676102B1 - Mobile Communication System For Zone Service And Service Providing Method - Google Patents

Abstract

 The present invention relates to a mobile communication system and a service providing method for a zone service capable of efficiently searching for an access point.

 The mobile communication system for zone service according to the present invention provides a mobile communication service to a user by transmitting a system parameter message including each base station ID and forming a cell, and relaying of the base station. A mobile communication system; A zone setter for defining a zone set to a different size from the cell, and receiving the location information from a location information system and sending the location information to the zone; The base station ID is compared with the home base station ID of the zone in which the zone is set to determine whether to search for the zone setter, and according to the determination, service zone confirmation field information in the origination message is created, and the origin is determined. And a mobile communication terminal for transmitting a nation message to the mobile communication system.

Description

Mobile Communication System For Zone Service And Service Providing Method

  1 is a diagram showing a cell and a zone of a conventional cellular phone system.

 2 shows a cell radius and an overlap region.

 3 is a diagram illustrating a wired / wireless interworking service.

 4 is a schematic diagram of a mobile communication system according to the present invention;

 5 is a simplified diagram of a zone setter;

 6 is a simplified diagram of a mobile communication terminal.

 7 shows a paging slot monitoring cycle.

 8 is a flowchart illustrating a service providing method according to the present invention.

<Description of the symbols for the main parts of the drawings>

2: cell 6, 34: base station

8, 32: mobile communication terminal 10: wired telephone network

12: access point 14: landline phone

16, 40: zone 30: zone setter

36: base station controller 38: mobile communication system

42, 50: short-range communication device 44: location information receiver

46, 58: control unit 48, 56: memory

52: mobile communication module 54: input and output device

 The present invention relates to mobile communication and a service method thereof, and more particularly, to a mobile communication system and a service providing method for a zone service capable of efficiently searching for an access point.

With the recent development of communication-related technologies, many communication services using wired / wireless are provided to users. The development and dissemination of optical fiber and the development of related systems have made it possible to realize the optical communication network, and the transmission speed and quantity of voice and data have been greatly increased. In addition, wireless communication systems have evolved from services that only support voice services, and have now reached a level where voice and data related services can be provided even during high-speed movement. Moreover, wireless data services include cellular systems using Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Bluetooth, Ubiquitous, Zigbee, etc. Increasingly, service providing areas, ranges, and users are increasing due to wireless Internet systems using short-range wireless communication technology.

Advances in technology and the resulting increase in the number of users of these services have led to consideration of the methods of charging fees for both the service provider and the user providing the service and the reliability and efficiency of the service delivery.

In this regard, telecommunications service providers that offer telecommunications services offer a variety of discounts and service charges to retain their customers and attract third parties and potential customers. Representative examples include local discount services of companies that provide mobile phone services and wired / wireless interworking services for interworking mobile communication terminals and wired telephone networks.

The regional discount service uses a cell-based technology, and additional services, such as a communication discount, are provided to the user when using a service in a region where a specific base station provides a service, that is, a cell area.

1 is a diagram showing a cell and a zone of a conventional cellular phone system.

Referring to FIG. 1, a conventional mobile phone system (or mobile communication system) includes a plurality of base stations (BSs) 6 that directly perform voice and data communication with a user's mobile phone. Each base station 6 forms a cell 2, which is a service providing area ranging from several hundred meters (m) to several kilometers (Km). In addition, the concept of zone 4 may be used by considering a plurality of cells 2 or a plurality of base stations 6 as one same area for subscriber, base station management, and the like. These base stations 6 are controlled by a base station controller (BSC).

2 is a diagram illustrating a cell radius and an overlap region.

Referring to FIG. 2, the cell 2 formed by one base station 6 forms a circle 2b under an ideal propagation environment. However, for the convenience of designing the communication network, the cell 2 is considered in a polygonal shape, and the communication network is designed mainly using a hexagonal shape 2a. In practice, however, one cell 2 forms an overlapping area 2c with adjacent cells 2 as in the circular cell 2b. This is a phenomenon caused by overlapping propagation reach of base stations forming each cell 2. The cellular phone entering the overlapping area 2c takes a base station 6 change procedure such as handoff to establish a call with the base station 6 which provides a better communication environment.

The case where the cell 2 forms the circle 2b is an ideal propagation environment, and in reality, the cell 2 is difficult to maintain the ideal circle 2b due to the feature, the number of subscribers in the cell, the weather, and the like. For example, if the area where the base station 6 is installed is a rural area where mainly rice paddies or low hills exist, the shape close to the circle 2b is maintained. In such an area, the radius of the cell 2 also becomes large because the average number of mobile phones that can maintain a call or communicate with one base station 6 is smaller than that of a densely populated area such as a city. On the other hand, if the urban area or the mountainous area where the buildings where the base station 6 is installed are many, the shape of the cell 2 becomes difficult to maintain the circular shape 2b. Furthermore, in the case of a large number of mobile phones, i.e. subscribers, present in a cell 2, such as an urban area, the radius of the cell is reduced to a range of several hundred meters, and the radius of the cell 2 is also a building within the cell 2. Due to the non-uniform form. In addition, flow occurs in the radius of the cell 2 due to weather elements such as weather.

When providing a service based on the cell 2 environment to the user, such as a regional discount, the service may not be correctly provided to the user due to the location, time of use, or weather at the time of use. In addition, in the case of the cell 2, the radius of the cell 2 is different according to the area as described above, so that the service area may be different for each user depending on the area designated by the user.

In order to solve such a problem, a method of setting a limited range, that is, a zone by a device or means, and discounting a communication fee when a mobile phone terminal enters or locates within a set range and uses a service is presented. have.

A representative example is wired and wireless interworking services. This wired / wireless interworking service is a service provided to a user in cooperation with a wireline carrier and a mobile carrier that provides a wired telephone service. The base station 6 uses a mobile phone to set a predetermined service area and use a call service within the set area. It is a service interworking with the landline network 10 by a service area relay (Access Point: AP). This is briefly shown in FIG. 3.

3 is a diagram illustrating a wired / wireless interworking service.

As shown in FIG. 3, the zone where the zone service is provided becomes an area where the AP 12 connected to the wired network is located. In this case, the distance in which the AP 12 and the mobile phone terminal 8 can communicate is within the range of the zone 16. To this end, the AP 12 for interworking with the wired telephone terminal 14 and the mobile phone 8 is connected to the wired telephone network 10. The AP 12 and the cellular phone 8 communicate by a short range wireless communication technology such as Bluetooth. The subscriber with the mobile phone 8 enters the area set by the AP 12, and when the subscriber tries to make a call, the AP 12 detects this. The AP 12, which detects a call attempt, blocks the connection between the mobile phone 8 and the mobile communication system and connects the mobile phone 8 and the wired telephone network 10. When the interworking with the wired telephone network 10 is established, the mobile telephone 8 is used as a wireless terminal of the home wired telephone 14. In addition, since the user does not use a mobile phone system, the user can make a call at a landline phone rate lower than that of the mobile phone rate. The interworking service has a disadvantage that only one user per line can be used because the user of the mobile phone 8 occupies a wired telephone line.

In addition, although the AP 12 for setting the area is installed, the call line used by the user is provided with a service which does not have a problem of line occupancy even if there are several subscribers in the same area by using a mobile communication network.

Also in this case, a method of confirming the zone is to use a Global Positioning System (GPS) or an AP 12 equipped with a short range wireless communication module. However, while the method using GPS is more accurate and convenient than the AP 12, the utilization rate is low due to the relatively expensive device. On the other hand, the AP 12 is cheaper than the GPS, but when a malicious user carries the AP 12, the AP 12 cannot be confirmed, and therefore, the mobile communication service provider is charged with a wired telephone fee even though it is not an actual zone. Causes loss.

In detail, the AP 12 determining the service providing radius is installed to determine the zone. In this case, the AP 12 uses an independent power source and is equipped with a module capable of short-range communication. In addition, a near field communication module capable of communicating with the AP 12 is also installed in the user's cellular phone 8. In such a system, location information of a region where the AP 12 is installed is stored in a server of a mobile communication company. When the subscriber who installed the AP 12 after the service registration uses the service, a communication channel is established between the AP 12 and the mobile phone 8, and the AP 12 transmits predetermined information via the mobile phone 8. The service is provided by providing the server to the mobile communication company or notifying the mobile communication company server of the mobile phone 8 confirming the communication channel formation.

However, in this case, even when the mobile phone 8 is out of the area near the service zone, the AP 12 is continuously searched, thereby increasing the power consumption of the mobile phone 8.

Accordingly, an object of the present invention is to provide a mobile communication system and a service providing method for a zone service capable of efficiently searching for an access point.

In order to achieve the above object, a mobile communication system for zone service according to the present invention includes a plurality of base stations which form a cell by transmitting system parameter messages including respective base station IDs and users by relaying the base stations. A mobile communication system for providing a mobile communication service to a user; A zone setter for defining a zone set to a different size from the cell, and receiving the location information from a location information system and sending the location information to the zone; The base station ID is compared with the home base station ID of the zone in which the zone is set to determine whether to search for the zone setter, and according to the determination, service zone confirmation field information in the origination message is created, and the origin is determined. And a mobile communication terminal for transmitting a nation message to the mobile communication system.

The mobile communication system further includes a zone service server storing the zone setter identifier, zone and subscriber information, a base station controller for controlling the base station, and a mobile switching center for connecting the zone service server and the base station controller. Equipped.

The zone setter includes a location information receiver for receiving the location information, a short range communication device for transmitting the location information, the location information is stored, paging slot information for communicating with the mobile communication terminal, and a slot cycle index. A memory for storing information, and a control unit for controlling the location information receiver, the local area communication device and the memory.

The mobile communication terminal includes a mobile communication module for establishing a communication channel with the mobile communication system, a short range communication device for receiving location information from the zone setter, location information from the zone setter, and the base station. The zone is identified using the provided base station location information, a memory in which the base station ID and the home base station ID are stored, the location information from the zone setter, the base station location information, the base station ID, and the ID of the home base station. It is characterized by including a control unit for creating field information.

The mobile communication terminal further includes an output device for providing the mobile communication service and the zone service to the subscriber, and an input device to which an initialization command for synchronizing the zone setter and the paging slot period of the mobile communication terminal is input. It is characterized by.

The home base station ID may be at least one.

When the base station ID and the home base station ID in the system parameter message are the same, the mobile terminal attempts to receive location information from the zone setter.

The zone service providing method according to the present invention includes a plurality of base stations forming a cell, a zone setter defining a zone defined in a different size from the cell, and provides a mobile communication service to a subscriber's mobile communication terminal. A method of providing zone service to the subscriber by using the method, the method comprising: transmitting a system parameter message including each base station ID; Defining a zone set to a different size than the cell; Receiving location information from a location information system; Comparing the base station ID with a home base station ID of an area in which the zone is set; Determining whether to receive the transmitted position information; Creating service zone confirmation field information in the origination message according to the determination; And transmitting the origination message to the mobile communication system.

The system parameter message may include location information of a base station transmitting the system parameter message.

The transmission period of the location information is a multiple of the paging slot monitoring period of the mobile communication terminal.

The location information is repeated at least four times in one slot.

The defining of the zone may include storing a home base station ID near a region where the zone is set, and storing location information of the home base station.

The receiving of the location information may include transmitting the location information to the mobile communication system, and determining whether the location information matches the location information of a pre-stored zone setting expected region.

The step of comparing the base station ID and the home base station ID may be performed by using the location information of the away base station having the area where the mobile communication terminal is located as the coverage and the location information of the zone setter between the zone setter and the away base station. And calculating a distance.

The comparing of the base station ID and the home base station ID may further include comparing the calculated distance with a coverage distance of the previously stored home base station.

Comparing the calculated distance with the coverage distance of the home base station, characterized in that it further comprises the step of creating the zone confirmation field information based on the comparison value.

When the base station ID and the home base station ID are the same, the mobile communication terminal may receive location information of the transmitted zone setter.

 Determining whether or not the position information of the transmitted zone setter is received comprises determining whether a new system parameter message has been received.

The step of determining whether the new system parameter message is received comprises determining whether the base station ID in the new system parameter message matches the base station ID in the previous system parameter message.

Determining whether or not to receive the location information of the transmitted zone setter, receiving the position information of the sent zone setter, the position information of the sent zone setter and the position information of the zone previously stored And calculating a moving distance of the zone setter using the same.

The step of determining whether the position information of the transmitted zone setter is received further comprises comparing the calculated movement distance with a previously stored movement restriction distance.

The comparing of the movement distance and the movement restriction distance may further include generating the zone confirmation field information according to the comparison result.

The location information may include at least one of latitude information and longitude coordinates.

Other objects and advantages of the present invention in addition to the above objects will become apparent from the detailed description of the embodiments with reference to the accompanying drawings.

Hereinafter, with reference to Figures 4 to 8 attached to a preferred embodiment of the present invention will be described in detail.

4 is a diagram schematically illustrating a mobile communication system according to the present invention.

Referring to FIG. 4, the mobile communication system according to the present invention includes a zone setter (or AP) 30, a mobile communication terminal 32, and a mobile communication system 38.

The zone setter 30 sets a region (or zone) 40 for providing a specific service (hereinafter referred to as a zone service) from a mobile communication company. In addition, the zone setter 30 provides location information to the mobile communication terminal 32 in the zone 40 established by short-range communication, so that the mobile communication terminal 32 can receive a specific service. Here, the specific service means a limited service for a predetermined region, such as a discount on call rate during the call in the zone 40. To this end, the zone setter 30 includes a location information receiving device such as a GPS and a short range communication device for communication with the mobile communication terminal 32. Here, the local area communication device refers to Bluetooth, ubiquitous, Zigbee, WLAN (Wireless Local Area Network).

The mobile communication terminal 32 provides a mobile communication service and a zone service to a user. To this end, the mobile communication terminal 32 includes a short range communication device for forming a communication channel between the mobile communication module (or device) and the zone setter 30 to form a communication channel with the mobile communication system 38.

The mobile communication system 38 provides a mobile communication service and a zone service to a user who owns the mobile communication terminal 32. To this end, the mobile communication system 38 includes a base station 34, a base station controller 36, a mobile switching center (MSC), and the like. Further, the server further includes a server storing service information such as zone service subscriber information and zone location information.

5 is a diagram briefly illustrating a zone setter.

The zone setter 30 includes a short range communication device 42, a location information receiver 44, a memory 48, and a controller 46.

The location information receiver 44 receives location information from a location information system such as GPS or a mobile communication base station, and provides the location information to the controller 46. Here, the position information received through the position information receiver 44 is information for confirming the operation position of the zone setter 30.

The short range communication device 42 establishes a short range wireless communication channel with the mobile communication terminal 32 and receives a location information request message from the mobile communication terminal 32. In addition, the position information relayed by the controller 46 is provided to the mobile communication terminal 32 through the formed short range wireless communication channel. In addition, the short-range communication device 42 receives the slot cycle index, paging slot information and current time information from the mobile communication terminal 32 and provides it to the controller 46.

The memory 48 stores various programs for the operation of the zone setter 30 and stores the received location information. In addition, the slot cycle index, paging slot information, and current time information received by the local area communication device 42 are stored.

The controller 46 drives a program stored in the memory 48 and controls the location information receiving device 44. In addition, when the location information request message is received from the mobile communication terminal 32, the controller 46 controls the short range communication device 42 to provide the location information to the mobile communication terminal 32. In addition, the controller 46 synchronizes the communication cycle with the mobile communication terminal 32 using the slot cycle index, paging slot information, and current time information.

6 is a view schematically illustrating a mobile communication terminal.

Referring to FIG. 6, the mobile communication terminal 32 includes a short range communication device 50, a mobile communication module 52, an input / output device 54, a memory 56, and a controller 58.

The short-range communication device 50 forms a communication channel with the short-range communication device 42 of the zone setter 30 under the control of the controller 58, thereby providing a location information request message, paging slot information, slot cycle index, and current time information. To the zone setter 30. In addition, the short-range communication device 50 receives the position information from the zone setter 30 and provides it to the controller 58.

The mobile communication module 52 forms a voice / data communication channel with the mobile communication system 38 to provide a mobile communication service to the subscriber. In addition, the mobile communication module 52 receives a variety of information provided through the base station 34 and the base station ID (Base Identification: Base_ID) to provide to the control unit 58.

The input / output device 54 includes a display device for displaying an image, a voice input / output device for inputting and outputting voice, and a user command input / output device for receiving a user's command.

The memory 56 stores various kinds of information and programs for driving the mobile communication terminal 32, and stores position information from the zone setter 30. In addition, the memory 56 stores a home base station ID (Home Base_ID), which is an ID of a base station in which the zone 40 is set.

The controller 58 controls the short range communication device 50, the mobile communication module 52, the input / output device 54, and the memory 56. In addition, the base station ID (Base_ID) and the home base station ID (Home Base_ID) in the system parameter message (SPM) received from the mobile communication system 38 are compared to determine whether the zone setter 30 is searched. do. The controller 58 compares the position information from the zone setter 30 with the position information stored in the memory 56 to determine whether the mobile communication terminal 32 is located in the zone 40. According to the position determination result of the mobile communication terminal 32, the controller 58 changes a value of a specific field (for example, NAR_AN_CAP) in an origination message (hereinafter referred to as "OM"). The control unit 58 informs the mobile communication system 38 whether the mobile communication terminal 32 can be provided with the zone service by changing the value of this specific field.

Hereinafter, operations of the zone setter 30 and the mobile communication terminal 32 will be described in more detail.

When the zone setter 30 is installed in the area selected by the subscriber, the zone setter 30 periodically transmits the location information received from the location information system. The transmission period of the location information is variable, and it is preferable that the transmission period is set to a multiple of the paging slot monitoring period for smooth communication with the mobile communication terminal 32.

In more detail, when the base station 34 is searched again for turning on the mobile communication terminal 32 or the like, the mobile communication terminal 32 first searches whether there is a pilot signal received. When the pilot signal is found, the time information is updated through a synchronization channel message of the paging channel. After updating the time information, the terminal maintains an idle state.

The idle terminal receives a signal at predetermined intervals to reduce power consumption and efficiency of communication. This signal reception period is called a paging slot monitoring period. This paging slot monitoring period is determined in multiples of 1.28 seconds. That is, the mobile communication terminal 32 monitors the paging channel of the neighboring base station 34 in units of 1.28 seconds, 2.56 seconds, and 5.12 seconds.

7 is a diagram illustrating a paging slot monitoring cycle.

As shown in FIG. 7, one paging slot monitoring period is divided into a paging channel monitoring period and a period other than this. The paging slot monitoring period currently used in the mobile communication system 38 is determined in multiples of 1.28 seconds as described above. Among these, the paging channel monitoring period, i.e., the length of the slot capable of transmitting information, is about 80 to 160 ms. to be.

The length of the slot uses a hash algorithm that can be calculated in Equation 1 below.

Equation 1 is a formula representing a hash algorithm for calculating a slot.

Here, t is a time in 20 ms unit, T is a slot cycle, and PLSLOT is calculated by Equation 2 by inputting a terminal number (IMSI_O) with a value between 0 and 2047.

Equation 2 is an expression for calculating the PGSLOT value.

로 정의된다. 또한, 헤쉬키는 아래의 수학식 3에 의해 정의된다.Where N is 2048, L is 0-15 bits of Hash_Key, H is 16-31 bits of Hashkey, and DECORR is

Is defined as In addition, the Heshkey is defined by Equation 3 below.

IMSI_O_S1 is the lower 7 digits of IMSI_O and IMSI_O_S2 is the upper 3 digits of IMSI_O. Here, IMSI stands for International Mobile Station Identification. Equations 1 to 3 are equations defined by international standards for determining communication periods.

Table 1 below shows a relationship between slot cycles and paging slot indexes for each paging slot period.

Paging Slot Cycle T  Paging Slot Cycle Index 1.28 sec One 0 2.56 seconds 2 One 5.12 seconds 4 2

The paging slot monitoring period is determined by Equations 1 to 3 and Table 1 described above.

In the present invention, the same applies to the zone setter 30. The slot period described above has a very short period of 80 to 160 ms. Therefore, if a signal from the zone setter 30 is not received in this period, the mobile communication terminal 32 will not be able to identify the zone 40, and as a result, the user will not be able to smoothly use the zone service. In addition, the power loss increases as the standby state must be maintained in other slots in order to receive the location information of the zone setter. In addition, when a signal transmission time point from the zone setter 30 differs by more than 40% of the slot length due to an external element of the communication, for example, a propagation delay or the like, the signal from the zone setter 30 is transferred to the mobile communication. A situation in which the terminal 32 cannot receive may occur.

To this end, in the present invention, the slot period and the signal transmission time of the zone setter 30 are synchronized with each other when the mobile communication terminal 32 searches for the zone setter 30.

When the mobile communication terminal 32 enters an area where the zone service can be received or the zone service is not provided even though the mobile communication terminal 32 enters the zone service, a request for receiving location information is requested from the zone setter 30 through an input / output device of the mobile communication terminal 32. (Mobile-Initiated AP GPS Information Request) is transmitted. At this time, the location information request message transmitted from the mobile communication terminal 32 to the zone setter 30 includes a slot cycle index, slot information and current time information. Here, the unit of the current time information to be transmitted is preferably transmitted in units of 80ms in consideration of the slot monitoring period.

Upon receiving the location information request message, the zone setter 30 changes its slot cycle index according to the received slot cycle index and updates its slot information PG_SLOT with the received slot information. Also, the time is changed from the time at which the time information of the zone setter 30 is received to the time considering the processing time of the location information request message. The zone setter 30 that has updated the slot cycle information transmits the position information to the mobile communication terminal 32. Here, it is preferable that the positional information transmitted from the zone setter 30 to the mobile communication terminal 32 is repeatedly transmitted about four times in one slot period in order to increase the transmission stability.

8 is a flowchart illustrating a service providing method according to the present invention.

Referring to FIG. 8, in order to use a zone service, a subscriber first applies for a service to a mobile communication service provider. According to the service request, the base station ID (hereinafter, referred to as "home base station ID", Home Base_ID) of the cell including the region where the subscriber intends to use the zone service is stored in the mobile communication terminal 32 of the subscriber. Here, a plurality of home base station IDs stored in the mobile communication terminal may be input in consideration of the case where the zone 40 is located in an overlapping region of the cell. Thereafter, the zone setter 30 is installed and an initial installation process is performed. In addition, the mobile communication service provider inputs location information of the region where the zone 40 is set in the server of the mobile communication system 38.

The initial installation process is set up and turned on by the zoner 30 by the subscriber or service provider. At this time, the zone setter 30 receives location information from the location information system and provides the location information to the mobile communication terminal 32. The mobile communication terminal 32 receiving the location information of the zone setter 30 transmits the data to the mobile communication system 38 through a data burst message. The server of the mobile communication system 38 having received the data burst message compares the location information stored at the time of subscription with the location information in the data burst message and checks whether it matches. If it is determined that they match after comparing the location information, the mobile terminal 32 notifies that the zone setter 30 is installed at the correct position. Upon receiving the installation confirmation message, the mobile communication terminal 32 stores the location information received from the zone setter 30 in the memory 56. In this case, the stored location information is preferably stored as data including latitude (BLUE_LATm) and longitude (BLUE_LONGm) coordinates of the zone setter 30. (S10, S20)

After installing the zone setter 30 by the above method, the mobile communication terminal 32 is a system parameter message (hereinafter referred to as "SPM") from the neighboring base station 34 during the overhead information update process. Is received). Thereafter, in the idle state, the mobile terminal 32 receives the SPM in the paging slot allocated to itself, and stores each field value of the SPM in the memory 56. In this case, the SPM includes information such as a base station ID (Base_ID) and a paging slot cycle index.

 The mobile communication terminal 32 receiving the SPM compares the home base ID (Home Base_ID) stored in the memory 56 with the base station ID (Base_ID) received by the SPM, and the base station in the region where the mobile communication terminal 32 is located. It is determined whether the zone 40 is the same base station as the base station of the set area (S40).

When the home base station ID (Home Base ID) and the base station ID (Base ID) are not the same, the mobile communication terminal 32 uses the location information of the base station received through the SPM and the location information of the zone setter 30 stored in the memory. The distance L between the zone setter 30 and the base station is calculated to determine whether is located within the coverage of the home base station.

Equation 4 is an equation for calculating the distance L between the base station in the cell region where the zone setter 30 and the mobile communication terminal 32 are located by using latitude and longitude coordinates in the location information.

Here, BLUE_LATm and BLUE_LONGm are latitude and longitude information of the point where the zone setter 30 is installed, and BASE_LAT and BASE_LONG are latitude and longitude information of the base station covering the area where the mobile communication terminal 32 is currently located. L represents a straight line distance between the base station and the zone setter 30.

When the distance between the base station and the zone setter 30 is calculated by Equation 4, the mobile communication terminal compares the radius of the zone 40 (or the comparison reference value Lt) with the straight line distance L in advance. It is determined whether or not 32 is within the coverage of the home base station. Here, the comparison reference value Lt is preferably set to 500 m in the city center and 1000 m in the other areas. In addition, it is preferable that the comparison reference value Lt can be input by the mobile communication terminal 32 at an arbitrary value between 50 m and 5000 m. (S50)

The comparison reference value Lt and the straight line distance L are compared, and when the straight line distance L is larger than the comparison reference value Lt, the mobile communication terminal 32 determines the NAR_AN_CAP (Service Zone Confirmation Field) in the origination message OM. ) Is set to '0' and transmitted to the mobile communication system 38. Here, '0' means that the zone is not located in the zone setter 30 (S120).

On the other hand, if the straight line distance L is smaller than or equal to the comparison reference value Lt, or if it is determined that the home base station ID (Home Base_ID) and the base station ID (Base_ID) are the same, then the mobile communication terminal 32 has a zone. Attempt to receive the location information in the paging slot allocated for communication with the setter (30) (S60).

When a new SPM is received while attempting to receive location information from the zone setter 30, it is determined whether the received base station ID BASE_ID is the same as the previous base station ID BASE_ID. (S70, S75)

If the received base station ID (BASE_ID) and the previous base station ID (BASE_ID) are not the same, the received base station ID (BASE_ID) and the home base station ID (Home Base_ID) are compared (S40). To S70).

On the other hand, if the received base station ID (BASE_ID) and the previous base station ID (BASE_ID) are the same or a new SPM is not received while receiving the location information, the mobile communication terminal 32 continuously attempts to receive the location information. (S70, S75, S80)

In this case, when the location information is received from the zone setter 30, the mobile communication terminal 32 calculates a movement distance DI for determining whether the zone setter 30 moves.

Equation 5 is an equation defined for the calculation of the moving distance DI.

When the movement distance DI is calculated, the mobile communication terminal 32 compares the calculated movement distance DI with the movement restriction distance DIt. Here, the movement limit distance DIt is a distance reflecting a communication radius of the short range communication device, and preferably has a value of about 10 m. Also, the movement limit distance DIt is a message or movement transmitted from the mobile communication system 38. It is desirable to change only by the carrier (S100).

If the value of the moving distance DI is greater than or equal to the moving limit distance DIt by comparing the moving distance DI with the moving limit distance DIt, the zone setter 30 is regarded as moved and the mobile communication terminal ( 32) transmits the NAR_AN_CAP to '0' to the mobile communication system 38. (S100 and S120).

On the other hand, if the value of the movement distance DI is less than the movement limit distance DIt value, the zone setter 30 is regarded as normally installed and the NAR_AN_CAP value is set to '1' to the mobile communication system 38. Transmit. (S110)

Thereafter, the mobile communication terminal 32 waits for the user's command input or the reception of the SPM while maintaining the idle state (S130) for the call waiting.

Here, the origination message OM should be transmitted after the value of NAR_AN_CAP is determined.

As described above, the mobile communication system and service providing method for the zone service according to the present invention allows the mobile communication terminal to receive only the transmission signal from the zone setter, and transmits from the mobile terminal to the zone setter only when necessary. To perform. In addition, when the mobile communication terminal moves outdoors, it attempts to receive the zone setter signal using the base station information only a minimum number of times, thereby minimizing the power consumption of the mobile communication terminal while enabling accurate and precise service zone search.

In addition, when the user desires or when the slot cycle index of the base station is changed, the mobile communication terminal directly requests the location information from the zone setter, and provides the changed slot cycle index to the zone setter to accurately change the cycle of transmitting the location information. Can be.

In addition, the mobile communication system and service providing method for the zone service according to the present invention can determine the intentional movement of the zone setter to charge more accurate service charges.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited by the detailed description of the invention described in the specification, but should be determined by the claims.

Claims (23)

A mobile communication system having a plurality of base stations which form a cell by transmitting system parameter messages including respective base station IDs and providing mobile communication services to respective mobile communication terminals by relaying of the base stations; A zone setter for defining a zone set to a size different from that of the cell and transmitting its location information to a mobile communication terminal located in the zone; By storing the home base station ID of the area where the zone setter is set, by calculating the distance between the zone setter and the base station using the location information from the zone setter even if the base station ID and the home base station ID are not identically searched or identical. If it is determined that the zone service is available, a mobile communication terminal for generating an origination message including service zone confirmation field information and transmitting it to the mobile communication system is provided. Mobile communication system. The method of claim 1, The mobile communication system A zone service server storing the zone setter identifier and the zone and subscriber information; A base station controller for controlling the base station; And a mobile switching center for connecting the zone service server and the base station controller. The method of claim 1, The zone setter A location information receiver for receiving the location information; A short range communication device for transmitting the location information, A memory for storing the location information and storing paging slot information and slot cycle index information for communication with the mobile communication terminal; And a control unit for controlling the location information receiver, the short range communication device, and the memory. The method of claim 1, The mobile communication terminal A mobile communication module for establishing a communication channel with the mobile communication system; A short range communication device for receiving location information from the zone setter; A memory storing location information from the zone setter, base station location information provided from the base station, the base station ID, and the home base station ID; And a control unit for creating the zone identification field information by using the location information from the zone setter, the base station location information, the base station ID, and the home base station ID. . The method of claim 4, wherein The mobile communication terminal  An output device for providing the mobile communication service and the zone service to the subscriber; And an input device to which an initialization command for synchronizing the zone setter and the paging slot period of the mobile communication terminal is input. The method of claim 4, wherein The home base station ID is at least one mobile communication system for the zone service, characterized in that at least one. The method of claim 4, wherein The mobile communication terminal And when the base station ID and the home base station ID in the system parameter message are the same, attempt to receive location information from the zone setter. And a zone setter defining a zone defined in a different size from the cell, and providing a zone service to the subscriber by using a mobile communication system providing a mobile communication service to the subscriber's mobile communication terminal. In the method of providing, Installing and registering a zone setter having a zone set to a different size from the cell to use zone services; Receiving a system parameter message including a base station ID from the mobile communication system at a mobile communication terminal; Receiving, by the zone setter, its own location information from a location information system and transmitting it to the mobile communication terminal; Comparing, by the mobile communication terminal, the base station ID with the home base station ID of the zone in which the zone is set, and determining whether the zone service is available based on the location information from the zone setter; Creating an origination message including a service zone confirmation field according to whether the base station ID matches a home base station ID and whether or not the zone service is available based on the location information from the zone setter; And transmitting the origination message to the mobile communication system. The method of claim 8, The system parameter message includes the location information of a base station transmitting the system parameter message. The method of claim 8, And the transmission period of the location information is a multiple of a paging slot monitoring period of the mobile communication terminal. The method of claim 10, And the location information is repeatedly transmitted at least four times in one slot section. The method of claim 8, Installing and registering the zone setter Storing a home base station ID near an area where the zone is set; And storing the location information of the zone setter. The method of claim 12, Storing the location information of the zone setter Transmitting, by the mobile communication terminal, location information received from a zone setter to the mobile communication system; Transmitting an installation confirmation message to the mobile communication terminal when the received location information and the location information of the pre-stored zone setting expected area match each other in the mobile communication system and match each other; And storing the location information of the zone setter upon receiving the installation confirmation message from the mobile communication terminal. The method of claim 8, Comparing the base station ID and the home base station ID is And calculating a distance between the zone setter and the away base station by using the location information of the away base station having the area where the mobile communication terminal is located as the coverage and the location information of the zone setter. How to Provide Services. The method of claim 14, Comparing the base station ID and the home base station ID is And comparing the calculated distance with a pre-stored coverage distance of a home base station. The method of claim 15, Comparing the calculated distance and the coverage distance of the home base station, And creating the zone confirmation field information according to the comparison value. The method of claim 8, And when the base station ID and the home base station ID are the same, the mobile communication terminal receives the transmitted location information. The method of claim 8,  Determining whether or not the zone service is available based on the location information from the zone setter And determining whether or not to receive a new system parameter message. The method of claim 18, Determining whether or not the new system parameter message is received And determining whether a base station ID in the new system parameter message matches a base station ID in a previous system parameter message. The method of claim 8, Determining whether or not the zone service is available based on the location information from the zone setter Receiving the transmitted position information; And calculating a moving distance of the zone setter using the transmitted position information and the previously stored position information of the zone. The method of claim 20, Determining whether or not the zone service is available based on the location information from the zone setter And comparing the calculated movement distance with a previously stored movement restriction distance. The method of claim 21, Comparing the movement distance and the movement limit distance And generating the zone confirmation field information according to the comparison result. The method of claim 8, The location information Zone service providing method comprising at least one of latitude information and longitude coordinates.

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