JP2005167542A - Digital cellular phone system and portable telephone used therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital cellular phone system capable of setting a group by a user, and to provide a portable telephone used by the system. <P>SOLUTION: When registration is notified to the digital cellular phone system, it can be determined whether a member in the group is within the communication area of a base station that is the same as the user or is adjacent to the user. When the member in the group is within the communication area of the base station that is the same as the user, notification to the user is made by short message service. Additionally, when the member in the group is in the communication area of the station that is the same as the user, the user can register position information on the member and the distance between the user and the member. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a digital mobile phone system and a mobile phone used therefor, and more particularly to a digital mobile phone system having group communication and a mobile phone used therefor.

  GSM is a digital mobile phone system started by Group Special Mobile. The main purpose of GSM is roaming in Europe. Thus, the user can use his mobile phone throughout Europe without any special system setting changes. Because of digital processing, the frequency band can be used more efficiently than an analog mobile phone system. GSM has a fixed base station structure similar to an analog mobile phone system. However, because GSM has improved processing power, it can provide functions such as multi-conference conference calls, call restrictions, caller identification, and simultaneous data transmission.

  GSM provides digital data transmission of user information and applies interleaving to it. RF digital modulation and frequency hopping can reduce the problem of multipath reception. The GSM frequency band can be divided into a frequency band of 890 to 915 MHz and a frequency band of 935 to 960 MHz by frequency division multiple access (FDMA) or time division multiple access (TDMA). For information communication, GSM can access data such as the Internet and ISDN. For information services, a user can receive a short message by telephone and a fax message by a fax machine.

  For the short message service, GSM has an instant message communication structure. This structure provides a service for sending simple text messages between users, that is, a short message service (SMS). The SMS server (SMSC) performs this function. Conventionally, a short message is limited to 160 characters and is transmitted between users. If the user does not maintain communication with the GSM system, the SMSC will save the message and send it when the user connects to the system.

  In addition to wireless communication, ICQ, which is widely used in the Internet, also applies to digital mobile phone systems. The main function of ICQ is to determine if other users are surfing on the Internet. Each user who uses ICQ needs to install the program on the hardware. When other users are on the Internet, it is possible to send messages or exchange files and data between users. ICQ is faster than email and users can receive messages immediately. However, ICQ applies only to computers.

Several services have been proposed between ICQ and mobile phones that allow the use of mobile phones to check for other users on the Internet and send messages. However, these services are provided between the computer and the mobile phone.
It has not yet been disclosed that a user sets a group and confirms whether another user is within the same communication range of a base station. Also, the function of notifying a user that another user is within the same communication range of a base station using SMS has not yet been disclosed.

Accordingly, an object of the present invention is to provide a digital mobile phone system in which a user can set a certain group and a mobile phone used in the system. When the registration is notified to the digital mobile phone system, a member of the group can be identified and it can be determined whether the member has registered the same digital mobile phone system as the user.
Another object of the present invention is to provide a digital mobile phone system in which a group can be set by a user and a mobile phone used in the system. When one member of the group is within the communication range of the base station, the user or other members can know by short message service (SMS).

  Another object of the present invention is to provide a digital mobile phone system in which a user can set a certain group and a mobile phone used in the system. When a user registers the position of one member of the group and the member is within the communication range of the base station, the position of the member can be identified and the distance between the user and the member can be determined. Users or other members can obtain the information via short message service (SMS).

  Still another object of the present invention is to provide a digital mobile phone system in which a user can set a certain group and a mobile phone used in the system. When a user registers the position of one member of a group and that member is within the communication range of an adjacent base station, the position of that member can be identified and the distance between the user and the member can be determined. Users or other members can obtain the information via short message service (SMS).

  In order to achieve the above object, the present invention discloses a digital cellular phone system having one base station and a cellular phone used in the system. In this digital mobile phone system, a first user terminal belonging to a certain group registers this digital mobile phone system, communicates with a base station, registers a participation notification function in the digital mobile phone system, The second user terminal belonging to the group registers the digital mobile phone system and notifies the first user terminal that it is communicating with the base station.

In the digital cellular phone system of the present invention, when the first user terminal is notified that the second user terminal has registered the base station, the second user terminal knows the switch to the radio system and communicates with the radio system. .
In the digital mobile phone system of the present invention, when the first user terminal registers the participation notification function, the group of the first user terminals is set as the registered participation notification function group. In one embodiment, the digital mobile phone system modifies the parameters of the group participation notification function when the first user terminal registers the participation notification function.

In the digital mobile phone system of the present invention, the first user terminal has a mobile phone for registering the digital mobile phone system and communicating with the base station. The mobile phone has the same function as that of the base station, such as an identification function. This identification function serves to confirm the ID when the second user terminal registers the wireless system. The identification function includes password entry by the second user terminal or identification of the subscriber identification module of the second user terminal.
In the digital mobile phone system of the present invention, the first user terminal is notified by a short message service (SMS). In one embodiment, the digital mobile phone system notifies the first user terminal of the location information of the second user terminal.

In the digital cellular phone system of the present invention, when the registration and location information of the second user terminal is notified to the first user terminal, the second user terminal is notified of the switch to the wireless system, and the wireless system and the second user terminal According to the position information, communication between the first and second user terminals is supplied. In one embodiment, the mobile phone has the same function as that of the base station, such as an identification function. The identification function fulfills the function of ID confirmation at the time of wireless system registration by the second user terminal. In another embodiment, the mobile phone adjusts the transmission output of the wireless system according to the location information of the second user terminal.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

  In one embodiment of the digital mobile phone system of the present invention, a user can set a group. When the registration is notified to the digital mobile phone system, a member of the group can be identified and it can be determined whether the member has registered the same digital mobile phone system as the user. In one embodiment, when one member of a group is within range of a base station, a user or other member can be informed by a short message service (SMS).

In another embodiment, when a user registers the position of one member of a group and the member is within the communication range of an adjacent base station, the position of the member can be specified, and the distance between the user and the member can be determined. Can be determined. The user or another member can obtain the information through a short message service (SMS).
Further, according to the present invention adapted to the mobile phone used in the above-described digital mobile phone system, when the member registration of the group is notified, the wireless system is switched to, and the wireless system is used to communicate with the members. Therefore, there is no base station switching problem. In one embodiment, the mobile phone has the same identification function as the base station. The identification function serves to confirm the ID when the second user registers the wireless system. The identification function includes password entry by the second user or identification of the subscriber identification module of the second user.

  In one embodiment, the present invention is compatible with mobile phones used in digital mobile phone systems that can determine the location of other users. When the first user is notified of the registration and location information of the second user, the second user is notified of the switch to the wireless system, and the location information of the wireless system and the second user determines between the first and second users. Communication is provided. Therefore, the mobile phone adjusts the transmission output of the wireless system according to the position information of the second user, and communicates with the member using the wireless system. For example, when the distance is long, a high output enhanced mode is applied. When the distance is short, the normal mode or the power saving mode is applied, and the cost can be reduced as a result of low power consumption.

The digital mobile phone system of the present invention can be used for communication between mobile phones using an arbitrary base station. According to the operation of the mobile phone of the present invention, a short message can be transmitted to this member of the group when a member is within the communication range of a certain base station.
Considering the density of base stations, the communication distance of GSM900 system is about 3 to 50km, depending on the topography and the buildings above it. According to the GSM1800 system, the communication distance is about 1 to 5 km, depending on the topography and the building above it. When the positions of base stations are not so close, the distance from one base station to a member is considered to be about 30 to 40 km. Therefore, it is necessary to specify the position. In addition, when the mobile phone can serve as a base station, location specification and transmission output adjustment are required to reduce power consumption.

  FIG. 1 is a schematic structural diagram showing an example of a digital cellular phone system applied to a GSM system. The network of the digital cellular phone system includes a user terminal 103. When the user 101 inserts a subscriber identity module (SIM) 102, the user terminal 103 becomes one port of the digital mobile phone system network. Terminal 103 communicates with base station 104 via a wireless system. The user terminal 103 is determined by the device of the user 101. A home location register (HLR) 107 controls registration and service management and incoming call management. The visited mobile switching center (VMSC) 106 controls registration and service management and incoming call management of the user terminal 103, and includes a visited location register (VLR). The route selection function of the communication mobile port depends on the roaming number from the signal determined by the HLR 107 between the gateway mobile switching center (GMSC) 108 and the VMSC 106. A method of determining a signal by the HLR 107 between the gateway mobile switching center (GMSC) 108 and the VMSC 106 depends on the signal protocol of the mobile communication application unit (MAP). It should be noted that the signal transmission between VMSC and GMSC goes through HLR but ends at device 109. The device 109 is composed of CCITT telephone user part (TUP) and ISDN user part (ISUP). After the conversion, mutual communication between the mobile phone gateway and the long-distance telephone becomes possible. The base station 104 is controlled by a base station controller (BSC) 105 that is an access node.

  FIG. 2 is a schematic structural diagram showing an example of the digital cellular phone system of the present invention. FIG. 4 is a diagram showing an operational flow of the exemplary digital mobile phone system of the present invention shown in FIG. The system includes a user terminal 212, a SIM 214, a user 216, a BS 210, and a BSC 220. The BSC 220 communicates with the network 230 of the digital cellular phone system shown in FIG.

  When the user 216 inserts the SIM 214, the user terminal 212 becomes one communication port of the digital mobile phone system and maintains communication with the BS 210 (step 410 in FIG. 4). The user terminal 212 is determined by the device of the user 216, that is, a mobile phone. User 216 belongs to one group. The user 216 registers the participation notification function in the digital mobile phone system, and determines whether a member belonging to the group registers the digital mobile phone system and communicates with the BS 210 (step 420).

  Next, when the user 216 registers the participation notification function, the digital mobile phone system sets the group of the user 216 as one group of the registration participation notification function (step 430). In one embodiment, the digital mobile phone system modifies parameters, such as parameters for a group join notification function. This depends on the design of the system.

  When another user 215 inserts the SIM 213, the user terminal 211 becomes one communication port of the digital cellular phone system and communicates with the BS 210. As shown in step 440 of FIG. 4, the user 216 knows that the user 215 is within the communication range of the base station. When the user 216 knows that the user 215 has registered the base station, the user 215 knows that the user has switched to the wireless system and communicates with the wireless system. Therefore, there is no base station switching problem. In one embodiment, the mobile phone of user 216 has the same identification function that the base station has. This identification function serves to confirm the ID when the user 215 registers the wireless system. The identification function includes password entry by the second user or identification of the second user's subscriber identification module.

FIG. 3 is a schematic structural diagram showing another example of the digital cellular phone system of the present invention. The system includes a user terminal 312, BS1 310, BSC 320, and BS2 330 adjacent to BS1 310. The BSC 320 communicates with the network 340 of the digital cellular phone system shown in FIG.
The user terminal 312 becomes one communication port of the digital cellular phone system and communicates with the BS1 310 (step 410 in FIG. 4). Users corresponding to the user terminal 312 belong to one group. The user registers the participation notification function in the digital mobile phone system, and determines whether a member belonging to the group registers the digital mobile phone system and communicates with BS1 310 and BS2 330 (step 420).

  Next, when the user registers the participation notification function, the digital mobile phone system sets the user group as one group of the registration participation notification function (step 430). In one embodiment, the digital mobile phone system modifies parameters, such as parameters for a group join notification function. This depends on the design of the system.

  A user terminal 332 corresponding to another user becomes one communication port of the digital cellular phone system, and communicates with BS2330. As shown in step 440 of FIG. 4, the user knows that another user is within the communication range of the base station. As shown in step 450, when the user knows that another user has registered the base station, it knows that another user has switched to the wireless system and communicates with this wireless system. Therefore, there is no base station switching problem. In one embodiment, the user's mobile phone has the same identification function that the base station has. This identification function serves to confirm the ID when another user registers the wireless system. The identification function includes password entry by the second user or identification of the second user's subscriber identification module.

FIG. 5 is a diagram illustrating the operational flow of the exemplary digital mobile phone system of the present invention shown in FIG.
The user terminal becomes one communication port of the digital mobile phone system and communicates with the BS (step 510 in FIG. 5). Users corresponding to user terminals belong to one group. The user registers the participation notification function in the digital mobile phone system, requests location information of one member, and determines whether the member belonging to the group registers the digital mobile phone system and communicates with the BS (step 520). .

  Next, when the user registers the participation notification function, the digital mobile phone system sets the user group as one group of the registration participation notification function (step 530). In one embodiment, the digital mobile phone system modifies parameters, such as parameters for a group join notification function. This depends on the design of the system.

  A user terminal corresponding to another user becomes one communication port of the digital cellular phone system and communicates with the BS. As shown in step 540 of FIG. 5, the user knows that another user is within the communication range of the base station and the location of the other user. The user then knows the distance between himself and another user. When the user knows that another user has registered the base station, the user knows that another user has switched to the wireless communication system and communicates with this wireless system (step 550). Therefore, there is no base station switching problem. In one embodiment, the user's mobile phone has the same identification function that the base station has. This identification function serves to confirm the ID when another user registers the wireless system. The identification function includes password entry by the second user or identification of the second user's subscriber identification module.

  In another embodiment, when a user knows that another user is within range of the same base station or an adjacent base station and the location of another user, the user or other member can receive a short message service ( The information can be obtained by SMS).

  In one embodiment, when the user knows the registration and location information of the second user, the switch to the wireless system is notified to the second user, and the first user and the second user are notified by the location information of the wireless system and the second user. Communication between users is provided. Therefore, the mobile phone adjusts the transmission output of the wireless system according to the position information of the second user, and communicates with the member using the wireless system. For example, when the distance is long, a high output enhanced mode is applied. When the distance is short, the normal mode or the power saving mode is applied, and the cost can be reduced as a result of low power consumption.

  With reference to FIG. 1, the location of the mobile phone will be described. When the user 101 is moving, the position of the user 101 is changed from one base station to another base station. The user's mobile phone, that is, the user terminal 103 detects the change of the base station, notifies the change to the HLR 107, and registers the position of the user. Since the position of the user terminal 103 is not fixed, the broadcast channel (BCCH) signal from the base station must be scanned. The user terminal 103 detects BCCH and records the signal. By using the three-point method, three base stations that transmit the strongest signals detected by the mobile phone are selected and their positions are specified.

The distance between the base station and the mobile phone depends on the characteristics of the GSM system. When applying a GSM system that employs time division multiple access (TDMA) technology, an adaptive frame synchronization (AFA) function is provided. Since the TDMA frame includes 8 time slots, the TDMA frames are synchronized with each other in the tunnel. The base station has a three-point slot delay called timing advance (TA) when downloading TDMA frames. This performs the AFA function.
When the base station receives the signal, the TA is measured. Practical and theoretical TA can be used to determine the distance between the base station and the mobile phone. Based on the three distances between the base station and the mobile phone and the location of the base station, the location of the mobile phone can be determined. The distance deviation can be controlled within 200 to 300m.

  Although the present invention has been described above with respect to typical embodiments, it is not limited thereto. Rather, the appended claims should be construed broadly to include other variations and embodiments that can be made by those skilled in the art without departing from the scope and equivalents of the present invention.

1 is a schematic structural diagram showing an example of a digital mobile phone system applied to a GSM system. 1 is a schematic structural diagram showing an example of a digital mobile phone system of the present invention. 1 is a schematic structural diagram showing an example of a digital mobile phone system of the present invention. FIG. 3 is a diagram showing an operational flow of the exemplary digital mobile phone system of the present invention shown in FIG. 2. FIG. 4 is a diagram showing an operational flow of the exemplary digital mobile phone system of the present invention shown in FIG. 3.

Explanation of symbols

210: BS
211: User terminal B
212: User terminal A
213: SIM
214: SIM
215: User B
216: User A
220: BSC
230: Digital mobile phone system network
310: BS1
312: User A
320: BSC
330: BS2
332: User B
340: Digital cellular phone system network

Claims (46)

A digital mobile phone system having a base station,
The digital mobile phone system has a first user terminal belonging to a group that registers the digital mobile phone system and communicates with the base station,
The first user terminal registers a participation notification function in the digital mobile phone system,
The digital mobile phone system is characterized in that a second user terminal belonging to the group registers the digital mobile phone system and notifies the first user terminal that it is communicating with the base station. Mobile phone system. The digital cellular phone system according to claim 1, wherein
When the first user terminal is notified that the second user terminal has registered the base station, the second user terminal knows the switch to the radio system and communicates with the radio system. Digital mobile phone system. The digital mobile phone system according to claim 2,
The first user terminal has a mobile phone having a function of registering the digital mobile phone system and communicating with the base station, and the mobile phone has an ID when the second user terminal registers the wireless system. A digital cellular phone system having a function of identifying the base station for confirming The digital cellular phone system according to claim 3, wherein
The digital cellular phone system, wherein the identification function includes input of a password by the second user terminal. The digital cellular phone system according to claim 3, wherein
The digital cellular phone system, wherein the identification function includes identification of a subscriber identification module of the second user terminal. The digital cellular phone system according to claim 1, wherein
The digital mobile phone system, wherein the first user terminal is notified by a short message service (SMS). The digital cellular phone system according to claim 1, wherein
The digital mobile phone system notifies the first user terminal of location information of the second user terminal. The digital cellular phone system according to claim 7, wherein
When the registration and position information of the second user terminal are notified to the first user terminal, the switch to the wireless system is notified to the second user terminal, and the position information of the wireless system and the second user terminal A digital mobile phone system, characterized in that communication between the first user terminal and the second user terminal is supplied. The digital mobile phone system according to claim 8, wherein
The first user terminal has a mobile phone for registering the digital mobile phone system and communicating with the base station, and the mobile phone receives an ID when the second user terminal registers the wireless system. A digital cellular phone system having a function of identifying the base station to be confirmed. The digital cellular phone system according to claim 9, wherein
The digital mobile phone system, wherein the mobile phone adjusts a transmission output of the wireless system according to position information of the second user terminal. The digital cellular phone system according to claim 1, wherein
The digital mobile phone system, wherein when the first user terminal registers the participation notification function, the group of the first user terminals is set as a registered participation notification function group. The digital cellular phone system according to claim 1, wherein
The digital cellular phone system corrects parameters of the participation notification function of the group when the first user terminal registers the participation notification function. A digital mobile phone system having a base station and a second base station nearby,
The digital mobile phone system has a first user terminal belonging to a group that registers the digital mobile phone system and communicates with the base station,
The first user terminal registers a participation notification function in the digital mobile phone system,
The digital mobile phone system notifies the first user terminal that a second user terminal belonging to the group registers the digital mobile phone system and communicates with the base station. Phone system. The digital mobile phone system according to claim 13,
When the first user terminal is notified that the second user terminal has registered the second base station near the first base station, the second user terminal knows the switch to the radio system, and A digital cellular phone system characterized by communication using a wireless system. The digital mobile phone system according to claim 14, wherein
The first user terminal has a mobile phone for registering the digital mobile phone system and communicating with the first base station, and the mobile phone is used when the second user terminal registers the wireless system. A digital cellular phone system having an identification function of the first base station for confirming an ID. The digital mobile phone system according to claim 15, wherein
The digital cellular phone system, wherein the identification function includes input of a password by the second user terminal. The digital mobile phone system according to claim 15, wherein
The digital cellular phone system, wherein the identification function includes identification of a subscriber identification module of the second user terminal. The digital mobile phone system according to claim 13,
The digital mobile phone system, wherein the first user terminal is notified by a short message service (SMS). The digital mobile phone system according to claim 13,
The digital mobile phone system notifies the first user terminal of location information of the second user terminal. The digital cellular phone system according to claim 19,
When the registration and position information of the second user terminal are notified to the first user terminal, the switch to the wireless system is notified to the second user terminal, and the position information of the wireless system and the second user terminal A digital mobile phone system, characterized in that communication between the first user terminal and the second user terminal is supplied. The digital mobile phone system according to claim 20,
The first user terminal has a mobile phone for registering the digital mobile phone system and communicating with the base station, and the mobile phone receives an ID when the second user terminal registers the wireless system. A digital cellular phone system having a function of identifying the base station to be confirmed. The digital mobile phone system according to claim 21, wherein
The digital mobile phone system, wherein the mobile phone adjusts a transmission output of the wireless system according to position information of the second user terminal. The digital mobile phone system according to claim 13,
The digital mobile phone system, wherein when the first user terminal registers the participation notification function, the group of the first user terminals is set as a registered participation notification function group. The digital mobile phone system according to claim 13,
The digital cellular phone system, when the first user terminal registers the participation notification function, modifies parameters of the participation notification function of the group. A mobile phone configured to register a participation notification function of a digital mobile phone system having a base station,
The mobile phone has a function of registering the digital mobile phone system and communicating with the base station, the first user terminal of the mobile phone belongs to a group, and the mobile phone joins the digital mobile phone system The mobile phone is notified that the notification function has been registered, and the second user terminal belonging to the group registers the digital mobile phone system and communicates with the base station. The digital mobile phone according to claim 25, wherein
When the first user terminal is notified that the second user terminal has registered the base station, the second user terminal knows the switch to the radio system and is sent by another mobile phone of the second user terminal. A mobile phone characterized by communicating with the mobile phone. The mobile phone according to claim 26,
The mobile phone has a function of identifying the base station for confirming an ID when the second user terminal registers the wireless system. 28. The mobile phone according to claim 27.
The mobile phone according to claim 1, wherein the identification function includes a password input by the second user terminal. 28. The mobile phone according to claim 27.
The mobile phone according to claim 1, wherein the identification function includes identification of a subscriber identification module of the second user terminal. The mobile phone according to claim 25,
The mobile phone is notified by a short message service (SMS). The mobile phone according to claim 25,
The digital cellular phone system notifies location information of the second user terminal to the first user terminal. The mobile phone according to claim 31, wherein
When the mobile phone is notified of the registration and location information of the second user terminal, the switch to the wireless system is notified to the second user terminal, and the location information of the wireless system and the second user terminal is the A mobile phone, characterized in that it provides communication with another mobile phone of the second user terminal. The mobile phone according to claim 32, wherein
The mobile phone has a function of identifying the base station for confirming an ID when the second user terminal registers the wireless system. The mobile phone according to claim 33,
The mobile phone according to claim 1, wherein the identification function includes a password input by the second user terminal. The mobile phone according to claim 33,
The mobile phone according to claim 1, wherein the identification function includes identification of a subscriber identification module of the second user terminal. A mobile phone configured to register a participation notification function of a digital mobile phone system having first and second base stations,
The mobile phone has a function of registering the digital mobile phone system and communicating with the first base station, the first user terminal of the mobile phone belongs to a group, and the mobile phone is in the digital mobile phone system. The mobile phone is notified that the participation notification function has been registered, and the second user terminal belonging to the group registers the digital mobile phone system and communicates with the second base station. Phone. The mobile phone according to claim 36,
When the first user terminal is notified that the second user terminal has registered the second base station, the second user terminal knows the switch to the wireless system and another mobile terminal of the second user terminal A mobile phone characterized by communicating with the mobile phone by a telephone. The mobile phone according to claim 36,
The mobile phone has a function of identifying the base station for confirming an ID when the second user terminal registers the wireless system. 40. The mobile phone according to claim 38.
The mobile phone according to claim 1, wherein the identification function includes a password input by the second user terminal. 40. The mobile phone according to claim 38.
The mobile phone according to claim 1, wherein the identification function includes identification of a subscriber identification module of the second user terminal. The mobile phone according to claim 36,
The mobile phone is notified by a short message service (SMS). The mobile phone according to claim 36,
The digital cellular phone system notifies location information of the second user terminal to the first user terminal. 43. The mobile phone according to claim 42.
When the mobile phone is notified of the registration and location information of the second user terminal, the switch to the wireless system is notified to the second user terminal, and the location information of the wireless system and the second user terminal is the A mobile phone, characterized in that it provides communication with another mobile phone of the second user terminal. 44. The mobile phone according to claim 43.
The mobile phone has a function of identifying the base station for confirming an ID when the second user terminal registers the wireless system. The mobile phone according to claim 44,
The mobile phone according to claim 1, wherein the identification function includes a password input by the second user terminal. The mobile phone according to claim 44,
The mobile phone according to claim 1, wherein the identification function includes identification of a subscriber identification module of the second user terminal.

Images