Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Reexamination Certificate
1997-01-13
2001-12-04
Trost, William G. (Department: 2683)
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
C455S517000, C370S473000
Reexamination Certificate
active
06327480
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to telecommunication methods for transmitting long information based on a comparison of transmission speeds to a plurality of receiving ends through networks or radiowaves, and for unilateral communication, and more particularly, to a telecommunication method permitting reduction of waiting time until transmission of data is started and efficient data communication.
2. Description of the Related Art
A telecommunication method of interest to the present invention is disclosed for example by Japanese Patent Laying Open No. 3-179944.
FIGS. 29A and 29B
illustrate the concept of a conventional repetitive data transmission as described in the document. The transmitting side (
FIG. 29
a
) repeatedly transmits a start signal, transmission data, and an end signal, while the data receiving side (
FIG. 29
b
) either receives data from the middle or waits for the start signal to start receiving the data upon accessing the transmission data. If the receiving side starts receiving data from the middle, the received data is stored in a memory, and the stored data is moved based on the information associated with the end signal and the start signal.
According to a conventional telecommunication method, if data is received from the middle, the necessary amount of memory capacity until the start or end signal is received is unknown, which makes it difficult to manage the memory. In the case of waiting for the start signal of data, the receiving side must wait for a long period of time until such start of data is received for lengthy data. Meanwhile, in the case of receiving data from the middle, if the content of data is updated and changed, the updated data must be received from the beginning, invalidating the already received data. Furthermore, the newest data upon accessing is not available, and the transmitting side cannot update the old until the transmission of the data completes. If there are provided a plurality of communication means, information may overlap between the plurality of communication means, which precludes efficient data communication.
SUMMARY OF THE INVENTION
It is therefore an object of the invention to provide an easy-to-use telecommunication method, in a telecommunication method of repeatedly transmitting the same information.
Another object of the invention is to alleviate management of a memory or the like when information is received from the middle of data.
Yet another object of the invention is to permit data to be updated during transmission.
Still another object of the invention is to permit utilization of data before updated if it can be used as is.
An additional object of the invention is to achieve communication less affected by communication time by utilizing information received before or after updating if data is updated on the transmission side.
Another additional object of the invention is to reduce time required for data communication if there are a plurality of communication means.
A telecommunication method by which the same information is repeatedly transmitted from a single information source to other information devices according to the present invention includes the steps of dividing the entire information into a plurality of data blocks on the transmitting side, transmissing the data blocks in a predetermined procedure, starting receiving an arbitrary data block among the transmitted data blocks, and obtaining the entire information when there is no longer any unreceived data block.
In a telecommunication method by which the same information is repeatedly transmitted, the entire information is divided into a plurality of data blocks and transmitted in a predetermined procedure, information is received from data blocks on the receiving side, then the entire information is obtained when there is no longer any unreceived data block, and therefore waiting time until the start of receiving data will be equal to only time required for transferring one data block. The memory can be managed on a block-basis. As a result, in a telecommunication method by which the same information is repeatedly transmitted, an easy to use telecommunication method can be provided.
The telecommunication method preferably includes a step of specifying data blocks. Since a plurality of data blocks produced by dividing are specified, it will be easier to know the order of restoring the plurality of data blocks on the receiving side.
The step of specifying data blocks more preferably includes a step of identifying information representing the position of storing a data block received on the receiving side, information representing the order of transmitting data blocks and data blocks, and the receiving side can manage and restore the received information based on these pieces of information.
In a telecommunication method according to another aspect of the invention, the positions of transmission blocks are shifted for transmission, using a plurality transmission media. The receiving side receives information simultaneously from the plurality of transmission media, only portions with no overlapped content are gathered. Different parts of data can be simultaneously received at a plurality of receivers, and therefore time required for communication can be reduced by combining the data.
Preferably, if there is an overlapped portion between the contents on the transmitting sides, at least one of the transmitters eliminates the overlapped information, and the information on the elimination is transmitted to the receiving side. The receiving side receives and restores desired information based on information from the plurality of transmitters as well as the elimination information.
If part of information is eliminated, the receiving side refers to information from another transmitter based on the information on the elimination. Thus, desired communication information can be obtained for a shorter time period without increasing repetition time by individual transmitters.
The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.
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Gesesse Tilahun
Nixon & Vanderhye PC
Sharp Kabushiki Kaisha
Trost William G.
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