JP3048883B2 - Telephone equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone apparatus and, more particularly, to a home telephone base station which functions as a base unit of a home cordless telephone and also functions as a public base station of a general terminal. is there.

[0002]

2. Description of the Related Art A second-generation cordless telephone system (Personal Handy Phone System: PHS) has been proposed as a portable telephone system in which a single portable telephone can be used to make a telephone call in all situations at home, business, and outdoors. Practical application is underway. In this PHS communication system, a telephone provided in a home not only has a function as a base unit of a conventional cordless telephone for home use, but also has a function of enabling line connection from a general mobile telephone. Known home telephone base stations are known.

Japanese Patent Laid-Open Publication No. Hei 4-170825 discloses that a radio station incorporated in a fixed station is divided into a plurality of channels by time division so that at least one of the time slots can be used by a public portable radio apparatus. In some cases, this fixed station is installed not only as a base station for a cordless telephone for home use but also as a fixed station for a public portable radio. Regarding handover for wireless communication channel assignment, a conventional technique is disclosed in
As disclosed in Japanese Patent Application Laid-Open No. 5026, a technique for changing a handover criterion according to a line utilization rate,
As disclosed in Japanese Patent No. 64477, there is known an example in which a handover criterion is changed based on a traffic channel usage rate at a handoff source and a traffic channel usage rate at a handoff destination.

[0004]

However, the number of communication channels in a home telephone base station is limited, and when all the channels are used by a general terminal, a child of the home telephone base station is used. Even if a person holding a portable terminal (home terminal) as a mobile device returns to the home and enters the wireless zone of the home telephone base station, the home terminal can control the home telephone base station. Can not make a call through. SUMMARY OF THE INVENTION It is an object of the present invention to provide a telephone device such as a home base station which can connect a line with a home terminal even when a communication channel is blocked by a general terminal.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and firstly, a telephone device connected to a public line network, and A telephone device wirelessly connected to a slave unit and wirelessly connected to a general terminal used for the public, wherein the slave unit of the telephone device is provided.
When a call request is made from a telephone terminal, a handover request is made to a general terminal using the communication line of the telephone device. Second, if all telephone lines of the telephone device are in use and at least one general terminal is in use and there is a call request from a slave unit of the telephone device, one of the general terminals is used. A handover request is made to the terminal.

A third is a telephone device connected to a public line network, which is wirelessly connected to a slave unit of the telephone device and wirelessly connected to a general terminal used for the public. And storing the ID of the slave unit of the telephone device.
A D storage unit, a slot information storage unit for each slot that stores information on whether the slot is in use, and information on whether a general terminal is using the slot,
According to the information stored in the storage unit and the slot information storage unit,
And a handover request unit for requesting handover to the general terminal. Also, the fourth
Is characterized in that information on whether or not handover is permitted to the terminal being used is further stored in the slot information storage unit. Fifth, the reception level for each slot is further stored in the slot information storage unit. Also, the sixth
Is characterized in that, when there are a plurality of general terminals that are permitted to perform handover among general terminals using a slot, a handover request is given priority over a general terminal having a low reception level.

[0007]

In the telephone device of the first configuration according to the present invention, when a general terminal is using the telephone line of the telephone device, for example, a slave unit in the wireless zone of the telephone device makes a call request. Then, a handover request is made to this general terminal. Then, the general terminal that has received the handover request performs handover to another base station, for example, a public base station, and establishes a line connection via the other base station. As a result, the telephone line of the telephone device can be used, and another terminal such as a slave unit uses the telephone line to make a call. ADVANTAGE OF THE INVENTION According to the telephone apparatus of this invention, even if the telephone line is blocked by use by a general terminal, the telephone line of the telephone apparatus can be used. Further, in the telephone device of the second configuration, when all of the telephone lines of the telephone device are in use and at least one general terminal uses the telephone line, a call request is issued from the child device of the telephone device. If there is, a handover request is made to the general terminal. Thus, the telephone line can be preferentially used by the slave unit of the telephone device.

[0008] In the telephone device of the third configuration, when a call request is made from a terminal such as a home terminal, the telephone device receives the call request.
Based on the information in the D storage unit, it is determined whether or not the terminal that has made the call request is a slave of the telephone device. When the terminal is a slave of the telephone device, a handover request is made to the terminal according to the information in the slot information storage unit. In other words, it is determined whether all slots are in use or not, of which general terminals are in use.For example, if all slots are in use and general terminals are using that slot, Requests handover to the general terminal.
By handing over the general terminal requested to be handed over to another base station such as a public base station, the telephone unit of the telephone device can use the communication line of the telephone device.

[0009] In particular, in the case of the telephone device having the above-mentioned fourth configuration, in the case where the information as to whether or not the handover is permitted to the terminal using the slot is stored in the slot information storage section. Performs handover to a terminal for which handover is permitted, so that there is no needless handover request. In particular, when the reception level of each slot is stored in the slot information storage unit as in the telephone device of the fifth configuration, for example, the handover is performed as in the sixth configuration. When there are a plurality of general terminals permitted to perform the handover, a general terminal having a low reception level issues a handover request. Therefore, the transmission quality between the telephone device and the general terminal can be maintained by giving priority to the handover of the general terminal having a low reception level.

[0010]

An embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the home base station A according to the present embodiment includes a line controller 10, a radio controller 12, a signal transmitter 14, a signal receiver 16, an antenna 18, a central controller 20 and a storage unit 22.

Here, the line controller 10 is connected to a public line network and controls an analog line or a digital line. In addition, the wireless control unit 12 controls the signal transmission unit 1
4, for performing wireless communication via the signal receiving unit 16 and the antenna 18, and for generating a home control carrier and a public control carrier. The central control unit 20 controls the operation of each unit of the home base station A. Here, when there is a call request from the home terminal, if all slots are used by general terminals, the central control unit 20 generates a handover request signal, and the radio control unit 12 transmits the signal. Unit 14, signal receiving unit 1
6. It has a function of outputting the handover request signal via the antenna 18. That is, the central control unit 2
0 also functions as a handover request unit.

Further, the storage unit 22 stores various data. For example, the storage unit 22 stores the data as shown in FIG.
A D table and a slot table as shown in FIG. 4B are provided. Here, as shown in FIG. 4 (a), the ID number of each home terminal as a slave unit of the home base station A is stored in the ID table. As shown in (b), various information about each slot is stored. In other words, data on whether a slot is in use or not, whether the terminal using the slot is for home use or public use, that is, whether it is a home terminal or a general terminal , Data indicating whether or not handover is permitted in a terminal using the slot, and data of a reception level with the terminal using the slot.

Next, the usage state of the home base station A having the above configuration will be described. First, as shown in FIG. 2A, a home base station A is installed in a home, and general terminals a to c are in a call state through the home base station A. Assume that all lines are in use. That is, it is assumed that all slots as communication channels are in use. Then, it is assumed that the person holding the home terminal as the slave unit of home base station A returns home and enters the wireless zone of home base station A. Then, it is assumed that a calling operation is performed using this home terminal.

Then, as shown in FIG. 3, the home terminal issues a link channel establishment request to the home base station A (S1). Then, the home base station A determines whether or not the terminal that has requested the link channel is a home terminal.
The determination is made based on the ID table provided in. If the terminal that made the call request is a home terminal, whether all slots are in use or not, and if all slots are in use, the general terminal uses all the slots. The storage unit 2 determines whether or not the general terminal is using all the slots and whether or not handover is permitted in the general terminal.
The determination is made based on the slot table of No. 2.

If all the slots are in use by a general terminal and there is a general terminal for which handover is permitted to the terminal being used, a handover request signal is output to the general terminal. Request a handover (S2). When there are a plurality of general terminals to which handover is permitted, a handover request is preferentially made to a general terminal having a low reception level.
By making a handover request to a general terminal to which handover is permitted as described above, useless handover can be prevented, and a handover request is given priority to a general terminal having a low reception level. Accordingly, transmission quality between home base station A and general terminals can be maintained as much as possible. In the present embodiment, it is assumed that a handover request is made to the general terminal a in FIG.

In response to the handover request, the general terminal a makes a link channel probability request to the public base station B (S3), and the public base station B sends a link channel probability request to the general terminal a. Link channel assignment is performed (S4). Then, call setting is performed from the general terminal a to the public base station B (S5), and call setting acceptance and response are performed from the public base station B to the general terminal a in response to the call setting (S6, S7) A communication state is established between the general terminal a and the public base station B. Further, the home base station A receives the information from the public network and sends a disconnection signal to the general terminal a,
In response, the release signal and the release completion signal are exchanged (S8, S9, S10). Then, home base station A
Has disconnected the line connection with the general terminal a, and then allocates a link channel to the home terminal (S1).
1) Then, the call setting from the home terminal, the call setting reception from the home base station, the call, and the response are performed (S12 to S1).
5).

As described above, as shown in FIG. 2B, the general terminal a is handed over so that the vacant slot can be used by the home terminal, and a call can be made from the home terminal. To be able to Note that even if a handover request is made to a general terminal,
If the general terminal is not handed over, a handover is requested to a general terminal to which another handover is permitted. On the other hand, when the home terminal makes a call request, unlike the above, if there is an empty slot in the communication channel, the slot is allocated to the home terminal and the link channel is allocated to the home terminal.

Although the above embodiment has been described assuming that a handover request is issued when a general terminal is in use for all slots, any slot is used by a general terminal permitted to perform handover. In such a case, a handover request may be made to increase the line use opportunity of the home terminal. Further, in the above-described embodiment, when a call operation is performed at the home terminal and a link channel establishment request is made, a handover request is made. However, the present invention is not limited to this. The timing of entering the station's wireless zone,
Alternatively, a handover request may be made to a general terminal at the timing of entering the wireless zone of the home base station and performing location registration.

In FIG. 3, the processing from disconnection (S8) to release completion (S10) is omitted if it is possible to confirm that the line connection between the general terminal a and the home base station has been disconnected. Is also good. In the above embodiment, the home base station has been described. However, if a telephone device that issues a handover request to a general terminal when a call request or the like is issued from a slave device, for example, a telephone device for a business establishment may be used. It may be a base station.

[0020]

According to the telephone apparatus according to the first aspect of the present invention, the telephone line of the telephone apparatus can be used by handing over the general terminal to another base station. Other terminals such as the slave unit can make a call using this call line. According to the telephone device of the second aspect, when a call request is issued from a slave device of the telephone device, a handover request is made to a general terminal. A telephone line can be used. According to the telephone device of the third aspect, a handover request is made to the general terminal according to the information in the ID storage unit and the information in the slot information storage unit. A telephone line can be used.

In particular, according to the telephone device of the fourth aspect, since a handover is performed to a terminal to which the handover is permitted, no unnecessary handover request is made. In particular, according to the telephone device according to the fifth and sixth aspects, the transmission quality between the telephone device and the terminal can be maintained by preferentially performing the handover with the terminal having the lower reception level.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a home base station according to an embodiment of the present invention.

2A and 2B are diagrams illustrating a use state of a home base station according to the present embodiment, in which FIG. 2A is a diagram illustrating a state in which a call is made from a home terminal, and FIG. It is explanatory drawing which shows the state.

FIG. 3 is a sequence diagram showing an operation state of the embodiment.

FIG. 4 is a diagram showing a table stored in a storage unit;
(A) is an explanatory view showing an ID table, and (b) is an explanatory view showing a slot table.

[Explanation of symbols]

 A home base station 10 line control unit 12 wireless control unit 14 signal transmission unit 16 signal reception unit 18 antenna 20 central control unit 22 storage unit

Claims (6)

(57) [Claims] 1. A telephone apparatus connected to a public network, as well as handset and wireless connection of the telephone apparatus, a telephone device for the general terminal and the wireless connection used for public, the telephone A telephone device , wherein , when a call request is issued from a child device of the device , a handover request is made to a general terminal using a telephone line of the telephone device. 2. If all telephone lines of the telephone device are in use and at least one general terminal is using the telephone line and a call request is issued from a slave unit of the telephone device, The telephone device according to claim 1, wherein a handover request is issued to a general terminal. 3. A telephone device connected to a public line network, wherein the telephone device wirelessly connects to a slave unit of the telephone device and wirelessly connects to a general terminal used for the public. An ID storage unit that stores an ID of a slave unit of the device; a slot information storage that stores, for each slot, information on whether the slot is in use and information on whether a general terminal is using the slot. And a handover request unit for requesting a general terminal to perform a handover according to information stored in the ID storage unit and the slot information storage unit. 4. The telephone device according to claim 3, wherein the slot information storage unit further stores information as to whether or not handover is permitted to the terminal being used. 5. The telephone device according to claim 3, wherein a reception level for each slot is further stored in the slot information storage unit. 6. When there are a plurality of general terminals that are permitted to perform handover among general terminals using slots,
6. The telephone device according to claim 5, wherein a handover request is performed with priority given to a general terminal having a low reception level.