Telecommunications – Radiotelephone system
Reexamination Certificate
1998-11-25
2001-12-11
Maung, Zarni (Department: 2154)
Telecommunications
Radiotelephone system
C455S434000, C455S575100
Reexamination Certificate
active
06330434
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is generally related to a mobile communication system. More specifically, the present invention is directed to a mobile communication system in which while an information (data) processing terminal is connected to a mobile station (portable telephone), data is communicated between this information processing terminal and an information processing center connected to a switching station.
2. Description of the Related Art
Generally speaking, when a data communication is carried out in a mobile communication system, especially when a data communication is performed in the presently available automobile telephone communication system, this data communication is carried out in a line switching base. However, in the case that the data is communicated in the line switching base, a mobile station (telephone) continuously captures a wireless (radio) line. As a result, while this mobile station executes the data communication, even in a lengthy time period during which the data is not actually transmitted/received, since the mobile station continuously captures the wireless line, the user of this mobile station must pay unnecessary data communication fee due to such a useless rest time period. On the other hand, in view of a total frequency utilizing efficiency, it is not preferable for communication providers when not actually communicated time occurs.
To solve such a useless time problem, one solution has been proposed, namely a data communication executed by a wireless packet communication. However, in order to actually use this packet communication system, the communication providers are required to considerably renew/additionally employ the facilities in the base stations in the service area. On the other hand, the users must newly purchase mobile stations adapted to this packet communication service.
The above-explained conventional mobile communication system owns the following problems:
(1). While executing the data communication, even when such a lengthy time period that the data is not actually transmitted/received is produced, since the mobile station continuously captures the wireless line, such useless time charge is charged to the user who should accordingly pay the unwanted communication fee.
(2). To utilize the above-explained wireless packet communication, the presently available communication infrastructure such as the base station must be largely renewed/added.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a mobile communication system capable of connecting a line only while data is actually transmitted/received under such a condition that a mobile station purchased and presently operated by a user is utilized while the presently available communication infrastructure can be directly used without any modifications. To achieve the above-described object, a mobile communication system, according to an aspect of the present invention, is featured by comprising:
an information processing center apparatus;
a switching station for controlling a connection of a wireless line;
a communication network for connecting the information processing center apparatus to the switching station;
a protocol quasi-terminating apparatus provided between the communication network and the switching station, for detecting as to whether or not a line connected between the communication network and the switching station is interrupted, and for quasi-terminating a protocol used to the communication network, and another protocol used to the mobile station in the case that the line is interrupted;
a mobile station for performing a data communication via the wireless line between the switching station and the own mobile station;
an information processing terminal for transmitting/receiving data between the information processing center apparatus and the own information processing terminal; and
a wireless line connection control apparatus provided between the mobile station and the information processing terminal, for transferring to the mobile station such an instruction to interrupt the wireless line between the switching station and the mobile station in the case that no data is transmitted/received between the information processing terminal and the mobile station; and also for transferring to the mobile station such an instruction to connect the interrupted wireless line in the case that the data transmission/reception is commenced between the information processing terminal and the mobile station.
In the mobile communication system of the present invention, when no data is transmitted/received between the information processing terminal and the mobile station, the wireless line connection control apparatus instructs the mobile station to interrupt the wireless line. When the protocol quasi-terminating apparatus detects that the line is interrupted, this protocol quasi-terminating apparatus quasi-terminates the protocol in order not to cut the logical link with the communication network.
As a consequence, the line can be connected only when the data is actually transmitted/received without requiring the user's operation.
Also, a mobile communication system, according to another aspect of the present invention, is featured by that
the wireless line connection control apparatus includes:
a transmit/receive data monitoring unit for duplicating data transmitted/received between the information processing terminal and the mobile station to output the duplicated data, and for transferring a line interrupt/connect instruction to the mobile station when the line interrupt/connect instruction is received;
a data communication present
ot present judging unit for judging as to whether or not there is such transmit/receive data duplicated by the transmit/receive data monitoring unit; and
a line connect/interrupt instructing unit for transmitting a line interrupt instruction to the transmit/receive data monitoring unit in the case that the detection result of the data communication present
ot present judging unit indicates that no transmit/receive data is present; and also for transmitting a line connect instruction to said transmit/receive data monitoring unit in the case that the detection result of the data communication present
ot present judging unit indicates that the transmit/receive data is present.
Furthermore, a mobile communication system, according to another aspect of the present invention, is featured by that
the protocol quasi-terminating apparatus includes:
a mobile station-sided protocol terminating unit for detecting as to whether or not the line between the communication network and the switching station is interrupted, and also for quasi-terminating a protocol used to the mobile station when a protocol termination instruction is entered to the mobile station sided protocol terminating unit; a communication network-sided protocol terminating unit for quasi-terminating a protocol used to the communication network when a protocol termination instruction is entered into the communication network-sided protocol terminating unit; and
a protocol terminating/matching control unit for transmitting a protocol termination instruction to both the communication network-sided protocol terminating unit and the mobile station-sided protocol terminating unit in the case that the detection result of the mobile station-sided protocol terminating unit indicates that the line is interrupted.
Also, according to another aspect of the present invention, another wireless line connection control apparatus having a similar arrangement to that of the wireless line connection control apparatus is further provided between the switching station and the protocol quasi-terminating apparatus.
In the mobile communication system of the present invention, since another wireless line connection control apparatus having the similar arrangement to that of the wireless line connection control apparatus is further provided between the switching station and the protocol quasi-terminating apparatus, the interrupt/re-conn
Chang Jung-won
Foley & Lardner
Maung Zarni
NEC Corporation
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