Telecommunications – Carrier wave repeater or relay system – Portable or mobile repeater
Reexamination Certificate
1998-10-02
2001-02-13
Hunter, Daniel S. (Department: 2749)
Telecommunications
Carrier wave repeater or relay system
Portable or mobile repeater
C455S422100, C455S445000, C455S550100, C370S338000, C370S328000, C370S349000
Reexamination Certificate
active
06188872
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method of checking reception of a message and transmitting reception acknowledgment information associated with the received message in a two-way radio communication system in which a plurality of communication terminal devices transmit and receive information to and from each other, and also to a storage medium on which a reception acknowledgment transmission program is stored for use in such a two-way radio communication system. The present invention also relates to a two-way radio communication system and a base station for use in the two-way radio communication system.
2. Discussion of the Background
In most widely-used paging systems or similar systems, a large-zone downstream radio system is employed, in which a message is transmitted in only one direction from a caller's telephone to a recipient's receiving terminal device such as a pager unit. There is no practical two-way radio communication system that allows a caller and a recipient to send and receive a message to and from each other.
Recently, a paging system has been proposed in which a called device sends a message reception acknowledgment signal to a calling device. For example, in the technique disclosed in Japanese Unexamined Patent Publication No. 61-208931, when a user of a pager unit serving as a receiving terminal device receives a message from a caller, if the user of the pager unit presses a particular button of the pager unit, data indicating the status of the called pager is sent to the caller. Japanese Unexamined Patent Publication No. 3-38122 discloses a technique in which when a pager unit receives a calling signal, a beeping sound is generated to inform a called person (user of the pager unit) of arrival of a message and an acknowledgment signal is sent to a caller.
However, the conventional techniques of checking and acknowledging reception of a message are applicable only to a one-way radio communication system in which a message is sent in only one direction from a caller to a recipient, and the techniques cannot be typically employed in a two-way radio communication system in which a message is sent in both directions. Another problem of the conventional techniques of checking and acknowledging reception of a message is that when a base station receives a reception acknowledgment signal sent from a called device, the base station immediately transfers the received acknowledgment signal to a calling device and thus the base station often encounters congestion of various data, which brings about a reduction in processing efficiency in the transmission of messages to called devices.
SUMMARY OF THE INVENTION
In view of the above, an object of the present invention is to provide a method of checking and acknowledging reception of a message in a two-way radio communication system without causing a reduction in the efficiency of processing messages.
It is another object of the present invention is to provide a storage medium on which a reception checking and acknowledging program is stored for use in such a two-way radio communication system.
It is still another object of the present invention is to provide such a two-way radio communication system and a base station for use in the two-way radio communication system.
The above and other objects are achieved according to an aspect of the present invention, wherein there is provided a method of checking and acknowledging reception of information in a two-way radio communication system in which information sent from a radio communication terminal device at a sending end is received by a relay station, the received information is transferred to a base station via a transmission line, and the information originating from the radio communication terminal device at the sending end is further transferred from the base station to a radio communication terminal device designated as the destination of the information thereby allowing a plurality of radio communication terminal devices to transmit and receive information to and from each other, wherein, in the process of transferring the information from the radio communication terminal device at the sending end to the radio communication terminal device at the destination, reception of the information originating from the radio communication terminal device at the sending end is checked and data indicating the result is sent to the radio communication terminal device at the sending end, and wherein the base station is adapted to operate in such a manner that when the base station correctly receives information sent from a radio communication terminal device at the sending end via the relay station and transmission line, the base station generates base station reception acknowledgment information indicating that the information has been correctly received; and when the base station transmits the information addressed to any of the plurality of radio communication terminal devices toward the plurality of radio communication terminal devices, the base station adds to the information the base station reception acknowledgment information addressed to the radio communication terminal device at the sending end and transmits the resultant information.
In the method of checking and acknowledging reception of information, the two-way radio communication system may include a plurality of transmission line communication terminal devices that are connected to the transmission line so that the transmission line communication terminal devices may transmit and receive information to and from the plurality of radio communication terminal devices via the base station, and the base station may be adapted to operate in such a manner that if the base station receives information that originates from any of the plurality of radio communication terminal devices and that is addressed to any of the plurality of transmission line communication terminal devices, the base station transmits the information via the transmission line to the transmission line communication terminal device designated as the destination of the information; if the base station correctly receives information that originates from a radio communication terminal device at a sending end via the relay station and transmission line and that is addressed to any of the plurality of radio communication terminal devices or any of the plurality of transmission line communication terminal devices, the base station generates base station reception acknowledgment information indicating that the information has been correctly received; and when the base station transmits the information addressed to any of the plurality of radio communication terminal devices toward the plurality of radio communication terminal devices, the base station adds to the information the base station reception acknowledgment information addressed to the radio communication terminal device at the sending end and transmits the resultant information.
In this method of checking and acknowledging reception of information, the plurality of radio communication terminal devices may be adapted to operate in such a manner that when any of the plurality of radio communication terminal device receives information addressed to that radio communication terminal device, the radio communication terminal device generates terminal device reception acknowledgment information addressed to a radio communication terminal device or a transmission line communication terminal device that is the original sender of the information, and transmits the terminal device reception acknowledgment information to the relay station; and the base station may be adapted to operate in such a manner that when the base station receives the terminal device reception acknowledgment information via the relay station and transmission line, if the terminal device reception acknowledgment information is addressed to any of the plurality of radio communication terminal devices, then the base station adds the terminal device reception acknowledgment in
Hosobuchi Kenichiro
Nagira Tumoru
Nakamura Kenzo
Shibuno Akira
Hunter Daniel S.
Le Lana
Mitsubishi Materials Corporation
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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