JPH02294197A - Private mobile communication system and wide area mobile communication system - Google Patents

Abstract

PURPOSE:To unnecessitate the preparation of the same number of speech lines as that of mobile machines by selecting and calling one of plural communication channels prepared between a radio channel controller by a private branch exchange, and transferring the number of the radio telephone set of an incoming request destination. CONSTITUTION:The private branch exchange 1-1 selects and connects a null line out of plural lines to the radio channel controller 1-13 when the terminal of the incoming request destination is the radio telephone set 1-20, and also, transfers the number of the terminal of the incoming request destination to the radio channel controller 1-13. The radio channel controller 1-13 recognizes the terminal to be called by receiving the transferred number of the terminal of the incoming request destination in spite of a connected line number. Thereby, it is not always required to prepare the same number of communication channels as that of the mobile machines between the private branch exchange 1-1 and the radio channel controller 1-13, and also, a terminal number can be attached independently from the extension number of the private branch exchange 1-1.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a communication method for a local mobile communication system and a communication method for a wide area mobile communication system in which a plurality of private mobile communication systems are connected. (Prior art and its problems) In ordinary home cordless telephones, a portable slave station and a fixed base station are in a fixed one-to-one correspondence, and a specific slave station is associated with a specific base station. Communication can only be made between Therefore, in order for a slave station to be able to make or receive a call, it must be near a corresponding specific master station. In contrast, recently developed cordless telephone systems for premises use
There is no fixed correspondence between a telephone and a wireless connection device, which is a fixed base station, and each wireless telephone can communicate with any one of multiple wireless connection devices. In such a campus cordless telephone system, for example, if wireless connection devices are placed throughout a single campus, calls can be made via the nearest wireless connection device no matter where you are on the campus, so it is easy to move around the campus. Communication can be realized. FIG. 5 is a diagram showing an example of the configuration of a current private cordless telephone system. In the figure, 5-1 is a private branch exchange, 5-2 is a wireless line controller, 5-31 to 5-3n are wireless connection devices, and 5- 41~5-4m is a wireless telephone, 5-51~5-5
m is a telephone line, and 5-61 to 5-60 are connection lines.
Between the private branch exchange 5-1 and the wireless line controller 5-2,
Call lines for the number of wireless telephones accommodated are installed (
In the example shown in the figure, there are m wireless telephones, so there are m number of telephones), and each wireless telephone is assigned one of the extension numbers corresponding to each call line. In other words, the number of the wireless telephone has a one-to-one correspondence with the number of the telephone line between the private branch exchange and the wireless line control device. Therefore, in a private branch exchange, when there is an incoming call request to a wireless telephone, there is no need to be aware that it is a wireless telephone, and the call can simply be connected to the line of the designated destination number. On the other hand, the wireless line control device can uniquely determine which wireless telephone the call request is directed to depending on which line is being called. For example, in the figure, assume that extension number 2001 is assigned to telephone line 5-51 and the corresponding wireless telephone is 5-41. For incoming call requests to wireless telephone 5-41, call extension 20.
When 2001 is dialed, the private branch exchange 5-1 calls the telephone line 5-51 in the usual way without having to be aware that it is a wireless telephone number. On the other hand, since the radio line control device 5-2 knows that the telephone line 5-51 corresponds to the radio telephone 5-41, it knows that it should call the radio telephone [5-41].

There are two issues that need to be solved with this type of method. 1
The first is that a communication path for several minutes of the wireless telephones to be accommodated must be prepared between the private branch exchange and the wireless line control device. Generally, all of the radio telephones accommodated do not make calls at the same time, so there is no need to prepare call lines for the number of radio telephones, which is wasteful. This is the first problem to be solved, and this first problem is:
Furthermore, there is a particular need to solve this problem when considering expanding the area of cordless systems within the premises. Currently, cordless systems within premises enable specific mobile communications, but we can imagine that there will be a demand for connecting multiple cordless systems to provide mobile communications services across regions. Current methods are poorly suited to meet such demands. The issues that need to be solved regarding wide area coverage are explained below using diagrams. FIG. 6 shows, as an example of expansion of the on-premises cordless system, a configuration example in which the on-premises cordless system of FIG. 5 is connected to three wide area systems. In the figure, 6-11 to 6-13 are private branch exchanges, 6-21 to 6
-23 is a radio line control device, 6-31 to 6-39 are radio connection devices, and 6-41 to 6-46 are radio telephones. 6-11.6-21.6-31 to 6-33.6-41 in the figure
~6-42 is the first on-premises cordless system, 6-12
．． 6-22.6-34 to 6-36.6-93 to 6-44
is the second campus cordless system, 6-13.6-23
6-37 to 6-39. 6-45 to 6-46 are the third Sugiuchi cordless systems, and symbols A, B, and C represent their respective service areas. In the example in Figure 8, There are only two wireless telephones in each system, so you only need to prepare two communication lines between the private branch exchange and the wireless line controller, but if you allow wireless telephones from other systems to be brought in. In this case, it is necessary to prepare call lines for the wireless telephones of other systems (in this example, 6 lines each), which is extremely wasteful considering the limited number of lines that can be accommodated by the private branch exchange, and requires a large system. cannot correspond to This is the first problem to be solved when considering a wide area system. The second issue to be solved is that there is no transfer function to other service areas. In the method described above, a call to a wireless telephone is made in the same way as a call to a regular landline telephone.
The caller specifies the number for the area where the wireless telephone is currently located, and then specifies the extension number, which is the number, for the wireless telephone. In other words, if multiple current in-premises cordless systems are connected together to form a wide area system, there is a constraint that the calling party must know the service area in which the other party is currently located. It is desirable to be able to communicate without knowing which service area the other party is in. To do this, the system must know the service area in which all wireless telephones in the system currently reside. In order to do this, a method is needed for each on-premises cordless system to exchange information about which wireless telephones are currently in the system. In current in-premises cordless systems, wireless telephones have a location registration function, which allows the wireless line controller to maintain and update which wireless connection device the wireless telephone in its own system is currently set to correspond to. can do. This information is used to determine which wireless connection device should be used when a call is requested to a wireless telephone, and which wireless connection device should be used to accept a call when a call is made from a wireless telephone. However, it does not have a location registration function that spans between systems. (Means for Solving the Problems) In order to solve the first problem, the present invention makes the line between the private branch exchange and the radio line control device and the number assigned to each radio telephone incompatible, and the private branch exchange If the terminal to which the call is requested is a wireless telephone, it selects an open line from among the multiple lines to the radio line controller, connects it, and transfers the number of the terminal to which the call is requested to the radio line controller. ,
The present invention proposes a communication method in which the wireless line control device knows which terminal to call by receiving the forwarded number of the terminal to which the call is requested, regardless of the connected line number. Furthermore, in order to solve the second problem and enable wide-area mobile communication, the present invention requires each radio line control device to change the registration of radio telephones within its own service area via a data line. By notifying each other, all wireless line controllers maintain and update the current location data of all wireless telephones, and when the wireless telephone called from the private branch exchange does not exist within its own service area, the wireless line controller By activating transfer to the correct service area, we provide a communication method that allows the caller and private branch exchange to connect without knowing the location of the wireless telephone. As a second solution to the above second problem, each wireless line controller notifies all private branch exchanges of changes in the registration of wireless telephones within its own service area, so that all private branch exchanges A communication method is provided in which the current location data of all wireless telephones is maintained and updated, and the private branch exchange transfers the call based on the information to the private branch exchange in the service area where the requested wireless telephone exists. <<Operations of the Invention>> According to the present invention, it is not necessary to prepare communication lines for the number of mobile devices to be accommodated between the private branch exchange and the radio line control device, and the terminal number is the same as the extension number of the private branch exchange. Can be attached independently. Furthermore, in wide area mobile communication systems that connect multiple local mobile communication systems,
It becomes possible to register the location of wireless telephones throughout the system, and automatically transfer them between local mobile communication systems accordingly. (Example) Next, an example of the present invention will be described with reference to the drawings.

In the present invention, a unique number is assigned to each wireless telephone independently of the extension number, but in order to distinguish the number of the wireless telephone from the extension number of a normal landline telephone, a special number for identifying the wireless telephone number is prepared. There is a need. In this example, we will assign 2 as the special number. In other words, when making a call to a wireless telephone, dial 2 and then dial the other party's wireless telephone number. A normal private telephone system also has special numbers for outside lines and special numbers for inter-office transfers between private branch exchanges. Here, the special number for outside lines is set to 0, and the special number for inter-office transfer is set to 1. Therefore, numbers starting with 0 or 1.2 shall not be assigned to regular landline telephone numbers. Also, after the special code for inter-station transfer, a number to specify the station is dialed. FIG. 1 is a block diagram showing an example of the structure and connection of a private branch exchange and a wireless line control device for carrying out the communication system described in claims 1, 2, and 3 of the present invention. In the figure, 1-1 is a private branch exchange, 1-2 is a switch circuit,
1-3 is a control unit, 1-4 is an outside line trunk group, 1
-5 and 1-6 are interoffice transfer and trunk groups, 1
-7 is a trunk group for connecting to a fixed telephone within your own office, 1-
8.1-21 is a trunk for accommodating fixed telephones, 1-9.1
-22 is a fixed telephone, 1-10 is a trunk group for accommodating a wireless line controller, 1-11 and 1-12 are signal transmitting/receiving circuits, 1-13 is a wireless line controller, 1-14 is a communication trunk, 1-15 1 is a signal transmission/reception circuit, 1-16 is a control unit, 1-17 to 1-19 are wireless connection devices, and 1-20 is a wireless telephone. In the figure, the signal transmission/reception circuits 1-11 and 1-15 each have one or more boats facing the ground. Using FIG. 1, we will first explain the connection method between ordinary landline telephones in the case where landline telephones 1-9 make a call. The dialed number is sent from the fixed station accommodation trunk 1-8 to the control unit 1-3, where number analysis is performed. If the first dialed digit is 0, the controller 1-3 controls the switch 1-2 to connect to the trunk group 1-4 for outside lines via the switch path a. Along with that 2
The dialed number after the digit is sent to the public 5R network exchange via the signal transmission/reception circuit 1-11. If the first digit of the dialed number is 1, the number with a specific number of digits after the second digit is analyzed and the trunk group for inter-office transfer to the station specified by that number is searched (this In this example, it is connected via inter-office transfer trunk group 1-5 or 1-6), route b or C, and the signal transmission/reception circuit 1-11 is connected to the destination station.
Transfer the number from the second digit onwards. If the first digit is 0
．． If it is other than 1.2, it is an extension connection within the own office, so for example, a route is connected to the trunk for accommodating the fixed station that accommodates the fixed telephone indicated by the dial number via the trunk group 1-7 for connecting the fixed telephone within the own office. Connect with d. Next, the communication method described in claim 1 of the present invention will be explained. From landline phone 1-9 to wireless phone till
Suppose you make a call to -20. Here, wireless telephone 1-2
If the number 0 is 0001, the landline telephone fill-9 dials 2-0001 with the wireless telephone special number 2 added. Since the first digit is a 2, the control phone 1-3 knows that the call is to a wireless telephone, and connects it to the wireless line controller storage trunk group 1-10 via path e, and also connects it via the signal transmission/reception circuit 1-12. and transfer the number 0001 from the second digit onward. Trunk group 1 for accommodating wireless line controller
-10 generally has multiple trunks, but we will select one of them that is available and connect it. The radio line control device 1-13 receives the radio telephone number 0001 of the incoming call request destination via the signal transmitting/receiving circuit 1-15, and the control unit 1
-16, the wireless telephone number 0001 is selected from the registered wireless connection devices 1-17 to 1-19 and connected to the telephone trunk. After this, the corresponding wireless connection device connects the wireless telephone 1-20 to its number 00 using the wireless channel.
It will be called using 0 1. Next, the communication method described in claim 2 of the present invention will be explained using figures. Figure 2 is a system configuration diagram showing an example of the configuration of a wide area mobile system that implements this communication method. In the figure, 2-1 to 2-3 are private branch exchanges, 2-4 to 2-6 are radio line control devices, and 2-7 is a central control device. Each wireless control device is connected to the central control device via a data line. ．． Here, the station designation number of private branch exchange 2-1 is 01, the station designation number of 2-2 is 02, and the station designation number of 2-3 is 03. Therefore, for example, private exchange 812-1
When a call is made from a landline telephone housed in private branch exchange 812-3 to a landline telephone housed in private branch exchange 812-3, the dialing number is 1-0 3-xxxx, where xxxx is the extension number in private branch exchange 2-3. It is. Although not shown in the figure, it is assumed that each wireless line control device is connected to multiple wireless connection devices. The position table updating method of the communication method according to claim 2 of the present invention will be explained using FIGS. 1 and 2.
The control unit 1-16 of the radio line control device 1-13 maintains a position table that records the position information of all radio telephones in the wide area mobile communication system. Furthermore, wireless connection device 1
The location table is constantly updated by receiving registration notifications from wireless telephones via -17 to 1-19. When the wireless connection device sends a registration notification from a wireless phone that has been outside its own service area, the control unit 1-16 sends a change notification including the number of the wireless phone to the signal transmission/reception circuit. 1-15 to the central control unit. The central control device also maintains a position table for all wireless telephones within its own device, and each time it receives the change notification, it changes the contents and updates the table to all wireless line control devices via the data line. Notify of change notification. Each wireless line controller updates its own position table according to the change notification from the central controller. FIG. 7(a) shows an example of the position table held at a certain point in time by the radio line controller 2-4 in FIG. 2. In this table,
For wireless telephones located in other service areas at that time, only the office designation number of the private branch exchange in that service area is written. For wireless telephones within your service area, the wireless connection device to which they are registered is also recorded. In the example of FIG. 7(a), wireless telephone 0001 is in the service area of private branch exchange 02, and wireless telephones 0002 and 0003 are in the service area of private branch exchange 03. Wireless telephones [10004 and 0005 are in the own service area, but among them, 0004 is registered with the number 3 wireless connection device, and 0005 is registered with the number 1 wireless connection device. FIG. 7(b) shows the contents of the position table held by the central control device 2-7 at that time. The location table of the central control device only records which service area each radio telephone is in. Using the method described above, each radio line controller can have a table containing the locations of all radio telephones. Next, we will explain how to connect. The private branch exchange 1-1 shown in FIG. 1 will be explained in correspondence with the private branch exchange 2-1 of the overall system shown in FIG. In addition, among the two interoffice transfer trunk groups in FIG. 1, 1-5 are shown in FIG. 2 as private branch exchange 1! l2
-2 is the trunk group, and 1-6 is the trunk group to private branch exchange v12-3 in FIG. Suppose that the fixed telephone till-9 makes a call to the radio telephone 0001 when the radio telephones are arranged as shown in the table of FIG. 7(b). The number to dial is 2-0001. Control unit 1-3 of private branch exchange 1-1
sees the 2 in the first digit and connects to the trunk group 1-10 for accommodating the radio line controller via route e, and at the same time transfers the radio telephone number 0001 to the radio line controller 1-13 via the signal transmission/reception circuit 1-12. do. Wireless line control device 1-1
3's control unit 1-16 checks the transferred number 0001 in the location table, learns that the wireless telephone is in the service area of the private branch exchange wA02, and controls the private branch exchange 1-1 via the signal transmission/reception circuit 1-15. A transfer request is made to section 1-3. The forwarding destination at this time is specified as 1-02-0001.
The control unit 1-3, which has received the transfer request via the signal transmission/reception circuit 1-12, disconnects the connected route e and establishes a new connection. In this case, since the transfer destination is specified as 1-02-000t, it is understood that transfer should be made to private branch exchange fi02, and route b is sent to interoffice transfer trunk group 1-5.
Connect with . In the private branch exchange 1102, there is also a wireless line controller that accommodates the own device! , and transfer the wireless telephone number 0001. The wireless line controller looks up the location table and finds that the wireless phone @ooooi is in its service area, so it can connect to the wireless connection device specified in the location table. In the above example, the calling fixed-line telephone dialed 2-0001, but the calling party may also specify a service area and dial. For example, if the caller knew that the other party was currently in the service area of private branch exchange 02, the caller would have called 1-02-2-
You will need to dial 0001. In this case, if the specified service area is correct, the unnecessary connection and transfer processing as in the previous example can be omitted. If the specified service area is incorrect, as in the previous example, the data will be connected to the wireless network controller in the specified service area and then transferred. After ijL, the communication method described in claim 3 of the present invention will be explained. This method differs from the method described in Section 2 in that the control unit of the private branch exchange maintains and updates the position table of all wireless telephones in the system. Figure 3 shows a configuration diagram of a wide area transportation system for implementing this method. In the figure, 3-1 to 3-3 are private branch exchanges, 3-4 to 3-6 are wireless line controllers, and 3-7 are private branch exchanges.
is a central control device. In this system, each private branch exchange is connected to a central control unit via a data line. First, the method for updating the position table of this communication method will be explained using Fig. 1. The control unit within the wireless line controller receives registration notifications from wireless telephones within the service area via the wireless connection device. The control unit only registers wireless connection devices for wireless telephones currently in its own service area! is recorded. When a new wireless telephone is registered in its own service area or when a recorded wireless telephone disappears from its own service area, the control unit notifies the private branch exchange of the change via the signal transmission/reception circuit. ．． In order to know that a recorded wireless phone has disappeared, each wireless phone must periodically send location registration notifications. In that case, if there is no new registration notification for a certain period of time, it is considered that the item has moved. If a wireless telephone does not regularly register its location and only sends a registration notification when the wireless connection device it was registered with changes, it will not be known that the wireless telephone has disappeared, so it will not be able to register the location of the wireless telephone on a private branch exchange only when registering a new wireless telephone. We will notify you. Each private branch exchange maintains a location table that registers the locations of all wireless telephones in the system, and upon receiving a change notification from the wireless line control device, transfers the change notification to the central control device via the data line. The central control unit also maintains the location table of all wireless telephones, receives change notifications from private branch exchanges, changes its own location table, and sends change notifications to each private branch exchange. Each private branch exchange receives the change notification and updates its own location table. The position table held by each private branch exchange and central control unit at a certain point in time is exactly the same as the format shown in Table 2, and the contents of the table are also the same for each private branch exchange and central control unit. As mentioned above, if each radio telephone does not regularly register its location and therefore each radio line controller has no way of knowing that a radio telephone has moved from its service area, the private branch exchange Furthermore, it is necessary to notify the wireless line controller installed in the user of changes in wireless telephones within the service area. As a method for updating the position table in this method, a method different from the above method is also possible. Figure 4 is an example of a configuration diagram of a wide area system for implementing different methods. 4-1 in the figure
4-3 is a private branch exchange, 4-4 to 4-6 are radio line control devices, and 4-7 is a central control device. The difference from Figure 3 is that the central processing unit is connected to each private branch exchange and each wireless line control device via data lines. In this case, each radio line control device can directly notify the central control device of changes in registered wireless telephones within its own service area. Next, the connection method described in claim 3 of the present invention will be explained. The private branch exchange 1-1 shown in FIG. 1 will be explained in correspondence with the private branch exchange 4-1 of the overall system shown in FIG. Also, of the two interoffice transfer trunk groups in Figure 1, 1-5 is the trunk group to the private branch exchange fi4-2 in Figure 4, and 1-6 is the trunk group to the private branch exchange 1114-3 in Figure 4. Group. The arrangement of the wireless telephone is shown in Figure 7 (
In the case of the state shown in the table b), it is assumed that the landline telephone all-9 makes a call to the wireless telephone 0001. The number to dial is 2-0001. The Ill control section 1-3 of the private branch exchange 1-1 sees the 2 in the first digit and knows that the call is to a wireless telephone, and sets the number 0 in the location table.
Check the location of 001's empty @telephone. From the table in FIG. 7(b), it can be seen that the wireless telephone 0001 is located in the private branch exchange 02, so the trunk group 1-
5 via route b. Private branch exchange 8102 similarly checks the location of wireless telephone 610001 in the location table, finds that it is within its own service area, connects to its own wireless line controller, and issues wireless telephone number 0001.
Transfer. The wireless line control unit can connect to a specific wireless connection device. (Effects of the Invention) As described in detail above, according to the present invention, it is not necessary to prepare as many call lines as the number of mobile devices to be accommodated between the private branch exchange and the wireless line WA control device, and Since the terminal number can be assigned independently of the extension number of the private branch exchange tfAtR, it is easy to expand the system to include multiple private branch exchanges. In more advanced systems, the radio line controller or local telephone maintains and updates the location of all radio telephones and forwards them accordingly, allowing callers to communicate without knowing the location of the other party. becomes.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the configuration and connection of a private branch exchange and a wireless line control device for carrying out the communication method of the present invention, and FIG. FIGS. 3 and 4 are block diagrams of a wide area mobile communication system for carrying out the communication system according to claim 3 of the present invention, and FIG. Fig. 6 is a block diagram showing an example of a wide area mobile communication system configured by connecting multiple cordless systems for premises, and Fig. 7 (a) and (b) show the contents of the position table. It is a diagram showing an example.

Claims (3)

[Claims] (1) For premises use, consisting of a plurality of portable wireless telephones, a plurality of distributed wireless connection devices, a private branch exchange, and a wireless line control device that connects the plurality of wireless connection devices to the private branch exchange. In the mobile communication system, each of the wireless telephones is assigned a special number that can be distinguished from a fixed telephone, and the in-tank switch is provided between the wireless telephone and the wireless line controller in response to an incoming call request to the wireless telephone. 1. A mobile communication system for premises use, characterized in that one of a plurality of communication lines is selected and a call is made, and the number of a wireless telephone to which an incoming call is requested is transferred to the wireless line control device. (2) comprising a plurality of portable wireless telephones, a plurality of distributed wireless connection devices, an in-tank exchange, and a wireless line control device that connects the plurality of wireless connection devices to the private branch exchange; In a wide area mobile communication system in which a plurality of local mobile communication systems that communicate using the communication method described in Section 1 are connected by telephone lines between private branch exchanges, each wireless line control device controls all wireless communication systems in the system. It maintains a table that records the service area in which a telephone currently exists, and when a new wireless telephone is registered within the service area of the own device or the registration of a wireless telephone within the service area is deleted, data communication By sending change notifications to all other radio network controllers directly or via the central controller via the network, the tables in all radio network controllers are updated, and each radio network controller When an incoming call is received from a housed private branch exchange to a wireless telephone, the number of the wireless telephone to which the incoming call is requested is checked in the table above, and if the wireless telephone to which the incoming call is requested is connected to the service of the own device. If the device is within the area, the call is made via the appropriate wireless connection device, and if the device is outside the service area, the wireless telephone is called to the private branch exchange that directly accommodates the device. A wide area mobile communications system that performs transfer processing to private branch exchanges in service areas where (3) comprising a plurality of portable wireless telephones, a plurality of distributed wireless connection devices, a private branch exchange, and a wireless line control device that connects the plurality of wireless connection devices to the private branch exchange; In a wide-area mobile communication system in which multiple private branch mobile communication systems that communicate using the communication method described in Section 1 are connected by telephone lines between private branch exchanges, each private branch exchange can communicate with all wireless telephones in the system. It maintains a table that records the existing service areas, and each radio line controller registers a new radio telephone within its own service area, or when the registration of a radio telephone within its service area is deleted. , all private branch exchanges update the table by directly or indirectly notifying all private branch exchanges of the change, and each private branch exchange, when a call request is made to a wireless telephone, transmits the call to the wireless telephone of the destination of the call request. The telephone number is checked in the table, and if the wireless telephone to which the incoming call is requested is within the service area of the own device, it is connected to the wireless line controller, and if it is in another service area, it is connected to the wireless line controller. A wide area mobile communication system that is characterized by forwarding data to the corresponding private branch exchange.