EP0101609A2
Expired / Lapsed
EP
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Data communication method
Assignee: Canon Inc
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Filing: 1983-08-17
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Granted: —
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Expires: 2003-08-17
Abstract
Abstract A data communication method allows communication to only one of a plurality of stations in a network which possesses a communication right. The station which possesses the communication right searches an operable station in the network, yields the communication right to the selected operable station, stores an address of the selected operable station, and in subsequent yielding of the communication right, yields the communication right to the station having the stored address.
Inventors
- 👤 Mitsuji Takao
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 23:52
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/28; H04L12/40; H04L12/407; H04L12/417; H04L12/42; H04L12/427; H04L12/433
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
72 words
A data commmunication method for allowing communication to only one of a plurality of stations in a network which possess a communication right, wherein said station which possesses the communication right searches an operable station in the network, yields the communication right to the selected station, stores an address of said selected station, and, in subsequent yielding of the communication right, yields the communication right to the station of the stored address.
Claim 2
Dependent Claim
72 words
A data commmunication method for allowing communication to only one of a plurality of stations in a network which possess a communication right, wherein said station which possesses the communication right searches an operable station in the network, yields the communication right to the selected station, stores an address of said selected station, and, in subsequent yielding of the communication right, yields the communication right to the station of the stored address.
Claim 3
Dependent Claim
49 words
A data communication method according to Claim 1 wherein said station which possess the communication right searches an operable station to update the address of the selected station for every predetermined number of times of yielding of the communication right based on the stored address of the selected station.
Claim 4
Dependent Claim
20 words
A data communication method according to Claim 1 wherein the stations in said network have different addresses from each other.
Claim 5
Dependent Claim
59 words
A data communication method according to Claim 1 wherein said station which possesses the communication right sends a command indicating yielding of the communication command to the station having an address, and yields the communication right to said station having said address when said station having said address sends back a reply indicating the acceptance of the communication right.
Claim 6
Dependent Claim
89 words
A data communication method for allowing communication to only one of a plurality of station in a network which possesses a communication right, wherein said station which possesses the communication right searches an operable station in a sequence of addresses of the stations closest to an address of its own, yields the communication right to the selected station, and if an operable station is not detected when the station having a first address has been checked searches an operable station sequentially starting from the station having a second address.
Claim 7
Dependent Claim
89 words
A data communication method for allowing communication to only one of a plurality of station in a network which possesses a communication right, wherein said station which possesses the communication right searches an operable station in a sequence of addresses of the stations closest to an address of its own, yields the communication right to the selected station, and if an operable station is not detected when the station having a first address has been checked searches an operable station sequentially starting from the station having a second address.
Claim 8
Dependent Claim
37 words
A data communication method according to Claim 5 wherein said station which possesses the communication right searches the operable station by checking the stations having the addresses which are sequential increments to the address of its own.
Claim 9
Dependent Claim
48 words
A data communication method according to Claim 6 wherein said station which possesses the communication right searches the operable station sequentially starting from the minimum address station in the network if the operable station is not detected when the maximum address station in the network has been checked.
Claim 10
Dependent Claim
52 words
A data communication method for transmitting data among a plurality of station through a network transmission line, wherein data transmission information is contained in a communication control command for data transmission, and communication operations in the stations other than a data transmitting station and a destination station are inhibited by said information.
Claim 11
Dependent Claim
52 words
A data communication method for transmitting data among a plurality of station through a network transmission line, wherein data transmission information is contained in a communication control command for data transmission, and communication operations in the stations other than a data transmitting station and a destination station are inhibited by said information.
Claim 12
Dependent Claim
32 words
A data communication method according to Claim 8 wherein an image data is transmitted and received between said transmitting station and said destination station during the inhibit period of the communication operations.
Claim 13
Dependent Claim
42 words
A data communication method according to Claim 8 wherein said communication control command contains data transmission time information, and said stations inhibit the reception of the data on said network transmission line in response to the reception of said communication control command.
Claim 14
Dependent Claim
32 words
A data communication method according to Claim 8 wherein said stations inhibit the output of the data to said network transmission line in response to the reception of said communication control command.
Claim 15
Dependent Claim
63 words
A data communication method for allowing communication to only one of a plurality of stations in a network which possesses a communication right, wherein said station which possesses the communication right tentatively yields the communication right to other station through a communication right tentative yield command when a communication waiting time occurs during the communication of said station which possesses the communication right.
Claim 16
Dependent Claim
63 words
A data communication method for allowing communication to only one of a plurality of stations in a network which possesses a communication right, wherein said station which possesses the communication right tentatively yields the communication right to other station through a communication right tentative yield command when a communication waiting time occurs during the communication of said station which possesses the communication right.
Claim 17
Dependent Claim
28 words
A data communication method according to Claim 12 wherein the station which yielded the communication right to the other station restores the communication right after said waiting time.
Claim 18
Dependent Claim
29 words
A data communication method according to Claim 12 wherein said communication right tentative yield command contains addresses of a transmitting station and a receiving station for the data communication.
Claim 19
Dependent Claim
20 words
A data communication method according to Claim 12 wherein an image forming operation is carried out during said waiting time.
Claim 20
Dependent Claim
63 words
A data communication method for transmitting data among a plurality of stations connected through a network transmission line, wherein a firmware relating to communication control is stored in a specified one of said plurality of stations, and the stations other than said specified station carry out the communication control operations by the firmware received from said specified station through said network transmission line.
Claim 21
Dependent Claim
63 words
A data communication method for transmitting data among a plurality of stations connected through a network transmission line, wherein a firmware relating to communication control is stored in a specified one of said plurality of stations, and the stations other than said specified station carry out the communication control operations by the firmware received from said specified station through said network transmission line.
Claim 22
Dependent Claim
23 words
A data communication method according to Claim 16 wherein the stations other than said specified station have memories for storing the received firmware.
Claim 23
Dependent Claim
30 words
A data communication method according to Claim 16 wherein said specified station sends out said firmware to said network transmission line at the start of the operation of said network.
Claim 24
Dependent Claim
18 words
A data communication method according to Claim 16 wherein said firmware stored in said specific station is changeable.
Claim 25
Dependent Claim
41 words
A data communication method for transmitting data among a plurality of stations of a network, wherein when the destination station is inoperable to receive the data, the transmitting station searches other operable station and transmits the data to the selected station.
Claim 26
Dependent Claim
41 words
A data communication method for transmitting data among a plurality of stations of a network, wherein when the destination station is inoperable to receive the data, the transmitting station searches other operable station and transmits the data to the selected station.
Claim 27
Dependent Claim
47 words
A data communication method according to Claim 20 wherein each of said stations of said network has a first address of its own and a second address of the station which receives the data to be transmitted to the inoperable station in place of said inoperable station.
Claim 28
Dependent Claim
43 words
A data communication method according to Claim 21 wherein when the destination station is inoperable to receive the data, the data transmitting station transmits the data to the station which has the same second address as the first address of said destination station.
Claim 29
Dependent Claim
75 words
A data communication method for transmitting data among stations in a plurality of networks linked to each other, wherein a communication control command for data communication contains information indicating the network to which the destination station belongs, and the communication control command issued from the station in the first network is sent to the other station in the first network or to the station in the second network depending on the content of said information.
Claim 30
Dependent Claim
75 words
A data communication method for transmitting data among stations in a plurality of networks linked to each other, wherein a communication control command for data communication contains information indicating the network to which the destination station belongs, and the communication control command issued from the station in the first network is sent to the other station in the first network or to the station in the second network depending on the content of said information.
Claim 31
Dependent Claim
48 words
A data communication method according to Claim 23 wherein.a gateway for linking said first network and said second network is provided, and said gateway transmits said communication control command to the station in said first network or in said second network depending on the content of said information.
References Cited (Backward Citations)
No citation records indexed.
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