Two-way information transmission system, two-way information transmission method and subscriber terminal device
First Claim
1. A two-way information transmission system provided with an information distribution transmission center and at least one subscriber terminal connected to said information distribution transmission center via an up-going line and a down-going line, said subscriber terminal sending an information distribution transmission request to said information distribution transmission center through said up-going line, and said information distribution transmission center transmitting requested information in response to said request through said down-going line, said two-way information transmission system comprising:
- an information distribution transmission center including;
transmission planning means for planning a transmission plan to transmit requested information based on an information distribution transmission request from a subscriber terminal,transmission means for transmitting said requested information based on said transmission plan planned by said transmission planning means,a plurality of transmission channels allocated for use for a plurality of urgency levels, wherein a number of said plurality of transmission channels allocated for a high urgency level increases in accordance with an increase in a number of requests for information distribution transmission, anddown-going control data sending means for sending down-going control data including information involving said transmission plan planned by said transmission planning means to said subscriber terminal which sent said information distribution transmission request, before said transmission means transmits said requested information; and
a subscriber terminal including;
distribution transmission request sending means for sending said information distribution transmission request including at least information for identifying said subscriber terminal making said request, information for identifying said requested information, and urgency information relating to an urgency level of said requested information, said urgency information including a real time transmission request,memory means,transmission plan receiving analysis means for receiving and analyzing said transmission plan based on said down-going control data from said information distribution transmission center,information acquisition means for acquiring said requested information transmitted from said information distribution transmission center based on said transmission plan and storing said requested information in said memory means, wherein when said urgency information is a real time transmission request said requested information transmitted from said information distribution transmission center is supplied without being stored in said memory means, and when said urgency information is other than said real time transmission request said requested information is stored in said memory means, said requested information having been acquired by said transmission plan receiving analysis means, andreading means for reading said information from said memory means.
1 Assignment
0 Petitions
Accused Products
Abstract
The subscriber terminal ms sends the demand including at least information for identifying the demand subscriber terminal, information for identifying the requested information, and information relating to the urgency of the requested information to the information distribution transmission center HE through an going-up line. The information distribution transmission center HE plans a transmission schedule of the information to be transmitted based on the demand from the subscriber terminal ms, and transmits the transmission schedule information included in the down-going control data to the subscriber terminal which sent the demand prior to the actual transmission, and transmits the requested information according to the above-mentioned transmission schedule. The subscriber terminal ms receives and analyzes the down-going control data from the information distribution transmission center HE and is informed of the transmission schedule, and acquires the information to be transmitted based on the obtained transmission plan, stores the acquired information in a large scale memory, and reads the information from the memory means for use. A video on-demand system can be realized without introducing a large scale system such as video server and with a relatively small investment, and the centralization of traffic is mitigated, and the network resource is used efficiently.
113 Citations
11 Claims
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1. A two-way information transmission system provided with an information distribution transmission center and at least one subscriber terminal connected to said information distribution transmission center via an up-going line and a down-going line, said subscriber terminal sending an information distribution transmission request to said information distribution transmission center through said up-going line, and said information distribution transmission center transmitting requested information in response to said request through said down-going line, said two-way information transmission system comprising:
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an information distribution transmission center including; transmission planning means for planning a transmission plan to transmit requested information based on an information distribution transmission request from a subscriber terminal, transmission means for transmitting said requested information based on said transmission plan planned by said transmission planning means, a plurality of transmission channels allocated for use for a plurality of urgency levels, wherein a number of said plurality of transmission channels allocated for a high urgency level increases in accordance with an increase in a number of requests for information distribution transmission, and down-going control data sending means for sending down-going control data including information involving said transmission plan planned by said transmission planning means to said subscriber terminal which sent said information distribution transmission request, before said transmission means transmits said requested information; and a subscriber terminal including; distribution transmission request sending means for sending said information distribution transmission request including at least information for identifying said subscriber terminal making said request, information for identifying said requested information, and urgency information relating to an urgency level of said requested information, said urgency information including a real time transmission request, memory means, transmission plan receiving analysis means for receiving and analyzing said transmission plan based on said down-going control data from said information distribution transmission center, information acquisition means for acquiring said requested information transmitted from said information distribution transmission center based on said transmission plan and storing said requested information in said memory means, wherein when said urgency information is a real time transmission request said requested information transmitted from said information distribution transmission center is supplied without being stored in said memory means, and when said urgency information is other than said real time transmission request said requested information is stored in said memory means, said requested information having been acquired by said transmission plan receiving analysis means, and reading means for reading said information from said memory means. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of two-way information transmission in which a subscriber terminal requests an information distribution transmission from an information distribution transmission center through an up-going line, and said information distribution transmission center transmits said requested information in a down-going line in response to said information distribution transmission request, said method comprising steps of:
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said subscriber terminal sending an information distribution transmission request including at least information for identifying said subscriber terminal sending said request, information for identifying said requested information, and urgency information relating to an urgency level of said requested information, said urgency information including a real time transmission request; said information distribution transmission center planning a transmission schedule of said requested information to be transmitted based on said information distribution transmission request from said subscriber terminal, and transmitting said planned transmission schedule to said subscriber terminal which requested said information distribution transmission request in down-going control data prior to transmission of said requested information, and transmitting said requested information according to said planned transmission schedule; said information distribution transmission center allocating a plurality of transmission channels for use for a plurality of urgency levels, wherein a number of said plurality of transmission channels allocated for a high urgency level increases in accordance with an increase in a number of requests for information distribution transmission; and said subscriber terminal receiving said transmission plan and analyzing said down-going control data from said information distribution transmission center, acquiring said requested information transmitted from said information distribution transmission center based on said transmission plan, storing said acquired information in memory means having a large capacity when said urgency information is other than a real time transmission request, and providing said information read from said memory means for use, wherein when said urgency information is a real time transmission request said acquired information is supplied for use without being stored in said memory means. - View Dependent Claims (8, 9, 10)
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11. A subscriber terminal of a plurality of subscriber terminals respectively connected to an information distribution transmission center through up-going lines and down-going lines, in which said subscriber terminal requests transmission of information from said information distribution transmission center through said up-going line, and said information distribution transmission center transmits said requested information through a down-going line in response to said request for transmission of information, said subscriber terminal comprising:
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distribution transmission request sending means for sending an information distribution transmission request including at least information for identifying said subscriber terminal making said request, information for identifying information requested for transmission, and urgency information relating to an urgency level of said requested information, said urgency information including a real time transmission request; memory means; transmission plan receiving analysis means for acquiring a transmission plan of information to be transmitted, said transmission plan being planned by said information distribution transmission center based on said information distribution transmission request from said subscriber terminal, by referring to control data sent from said information distribution transmission center; information acquisition means for acquiring said requested information transmitted from said information distribution transmission center and storing said acquired information in said memory means when said urgency information is other than a real time transmission request based on said transmission plan acquired by said transmission plan receiving analysis means, wherein when said urgency information is a real time transmission request said acquired information is supplied for use without being stored in said memory means; and reading means for reading information from said memory means, wherein said information distribution transmission center allocates a plurality of transmission channels for use for a plurality of urgency levels such that a number of said plurality of transmission channels allocated for a high urgency level increases in accordance with an increase in a number of requests for information distribution transmission.
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Specification