Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
1998-11-18
2001-10-02
Nguyen, Lee (Department: 2683)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S412100, C455S418000, C455S422100, C455S426100, C455S520000, C370S311000, C379S219000
Reexamination Certificate
active
06298237
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to radio switching equipment. More particularly, the invention relates to radio switching equipment controls enabling a plurality of mobile terminals to use one trunk circuit.
2. Description of the Related Art
Conventionally, radio switching equipment has been employed for connecting one mobile terminal with another mobile terminal to permit communication therebetween. Each trunk circuit and each mobile terminal are preliminarily matched on a one-to-one basis using office data as a parameter in the radio switching equipment. A call from the trunk circuit is received only by the mobile terminal which is preliminarily matched to the trunk circuit corresponding to the office data.
In the conventional radio switching equipment set forth above, it is not possible for an unmatched mobile terminal to receive a call from the above trunk. Accordingly, when the number of registered mobile terminals is greater than the number of trunk circuits, some mobile terminals cannot receive calls from all of the trunk circuits.
SUMMARY OF THE INVENTION
The first object of the present invention is to provide radio switching equipment, which avoids having a mobile terminal that cannot receive a call from a trunk circuit. The mobile terminal should be able to connect to the trunk circuit, even when the number of mobile terminals is greater than the number of the trunk circuits, in order to avoid the problem of the prior art.
The second object of the present invention is to provide radio switching equipment which permits the mobile terminal to receive a call from a desired trunk circuit and to call out with a desired trunk circuit.
The third object of the present invention is to provide a radio switching equipment which can permit the mobile terminal to vary the content of a circuit correspondence memory through operation from the mobile terminal. The content of the memory should be modified to dissociate the mobile terminal from the trunk circuit. In this instance, the call from the trunk circuit is not received by the mobile terminal (reject call reception).
According to the first aspect of the invention, a radio switching equipment comprises
circuit correspondence storage means for storing a plurality of mobile terminal numbers with respective correspondence with a circuit number of each trunk circuit,
circuit control means for reading out the mobile terminal number corresponding to the circuit number of the trunk circuit or reading out the circuit number of the trunk circuit corresponding to the mobile terminal number, on the basis of a storage content of the circuit correspondence storage means when a call is received from the trunk circuit or when call is made from the mobile terminal, and for requesting call processing,
call processing means for receiving the call processing request from the circuit control means and establishing a connection between the mobile terminal identified by the mobile terminal number and the trunk circuit identified by the circuit number, and
varying means for varying correspondence between the circuit number of the trunk circuit and the mobile terminal number of the mobile terminal through which a demand for variation is requested, in the circuit correspondence storage means, in response to the demand for variation from the mobile terminal.
In the preferred construction, the circuit correspondence storage means stores correspondence between the circuit number of the trunk circuit and the mobile terminal number of the mobile terminal and an information indicating whether the mobile terminal is permitted variation of the storage content of the circuit correspondence storage means, and receives only a demand for variation from the mobile terminal which is permitted variation on the basis of the circuit correspondence storage means and performs variation of the storage content of the circuit correspondence storage means.
In another preferred construction, the mobile terminal issues the variation demand by sending a special number designated by the circuit number of the trunk circuit corresponding to the mobile terminal number of the mobile terminal.
In another preferred construction, the circuit correspondence storage means stores correspondence between the circuit number of each trunk circuit and the mobile terminal number of the mobile terminal and whether the mobile terminal is permitted to vary the storage content of the circuit correspondence storage means,
the mobile terminal performs the variation demand by transmitting a special number designating the circuit number of the trunk circuit corresponding to the mobile terminal number of the mobile terminal; and
the varying means performs variation of the storage content of the circuit correspondence storage circuit receiving only variation demand from the mobile terminal which is permitted to vary, on the basis of the circuit correspondence storage means.
In another preferred construction, the mobile terminal establishes correspondence of the mobile terminal number of own mobile terminal with any one of the circuit numbers of the trunk circuits, or delete the correspondence between the circuit number of the trunk circuit and the mobile terminal number of the own mobile terminal,
the varying means establishes correspondence between the circuit number of the trunk circuit and the mobile terminal number and the mobile terminal number of the mobile terminal or deletes correspondence between the circuit number of the trunk circuit and the mobile terminal number and the mobile terminal number of the mobile terminal.
In another preferred construction, in the circuit correspondence storage means, a correspondence between the circuit number of the trunk circuit and the mobile terminal number of the mobile terminal is stored together with information about whether the mobile terminal is permitted to vary the storage content of the circuit correspondence storage means or not,
the mobile terminal establishes correspondence for the mobile terminal number of its own mobile terminal to any one of the circuit numbers of the trunk circuit and deletes correspondence between the circuit number of its trunk circuit and the mobile terminal number of its own mobile terminal by transmitting a special number designating the circuit number of the trunk circuit corresponding to the mobile terminal number of its own mobile terminal, and
the varying means receives the variation demand only from the mobile terminal which is permitted to vary on the basis of the circuit correspondence storage means, establishes correspondence between the circuit number of the trunk circuit and the mobile terminal number of the mobile terminal or deletes correspondence between the circuit number of the trunk circuit and the mobile terminal number of the mobile terminal as demanded on the basis of the variation demand.
According to the second aspect of the invention, a circuit control method in a radio switching equipment comprising the steps of
storing a plurality of mobile terminal numbers with correspondence with a circuit number of each trunk circuit in circuit correspondence storage means,
varying the correspondence between the circuit number of the trunk circuit and the mobile terminal number of the mobile terminal which issues a variation demand, stored in the circuit correspondence storage means, in response to the variation demand from the mobile terminal.
In the preferred construction, the correspondence between the circuit number of each trunk circuit and the mobile terminal number of the mobile terminal and an information whether the mobile terminal is permitted to vary the storage content of the circuit correspondence storage means are stored in the circuit correspondence storage means, and
variation of the storage content of the circuit correspondence storage means is performed by receiving the variation demand only from the mobile terminal which is permitted to vary the storage content of the circuit correspondence storage means.
In another preferred constr
Ihara Takanobu
Sekinishi Akira
NEC Corporation
Nguyen Lee
Nguyen Simon
Ostrolenk Faber Gerb & Soffen, LLP
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