US6014753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Server address management system
Assignee: Hitachi Ltd
•
Filing: 1997-07-11
•
Granted: 2000-01-11
•
Expires: 2017-07-11
Abstract
Abstract A method and system for entering the address of an address server to plural terminals connected to a switch, selecting a target address and switching to a substitute address server when a failure occurs in the target address server. In the invention when the switch is activated, its address management section generates a logical network table. Next when each terminal is activated, its address processing section generates a server address table and informs the switch of the address and the logical network of the terminal and whether the terminal is an address server. The address management section of the switch registers this information to logical network table. When another terminal is activated and informs the switch of its address and logical network, the address management section of the switch registers the information to its logical network table, and checks whether the address server of the other terminal has been registered. If the address server of the other terminal has been registered, the other terminal is informed of the address of the terminal and the address is registered to the other terminal. The other terminal informs the terminal of the address of the terminal other using the address of the terminal and the terminal registers this address.
Inventors
- 👤 Takahisa Miyamoto
- 👤 Sunao Sawada
- 👤 Yoshikazu Tominaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:03
CPC Classifications
H; H04; H04L; H04L61/00; H04L61/09; H04L61/10; H04L12/00; H04L12/54; H04L12/56; H04L12/5601; H04L2012/5685
Claims Analysis
Total Claims: 51
Claim 1
Independent Claim
265 words
A server address management system for use in a nonbroadcast system type communication system including an address server for collectively managing addresses of a plurality of terminals and a switch connected to said address server and said terminals, said server address management system comprising: an address management section included in said switch, said address management section manages the address of said address server; and an address processing section included in each of said terminals and said address server, said address processing section registers and obtains the address of said address server, wherein said address processing section included in said address server, sends the address of said address server to said switch and said address management section of said switch registers the received address of said address server in a first table, wherein said address processing section, included in each terminal, sends the address of said terminal to said switch, wherein said address management section, included in said switch, in response to the address of said terminal sent from said terminal, registers the address of said terminal in said first table, and in response, sends the address of said address server stored in said first table to said terminal, and wherein said terminal, in response to the address of said address server sent from said switch, registers the address of the address server in a second table included in said terminal, and when an address of another terminal is required, sends a request for the address of said another terminal to said address server using the address of said address server stored in said second table.
Claim 2
Dependent Claim
265 words
A server address management system for use in a nonbroadcast system type communication system including an address server for collectively managing addresses of a plurality of terminals and a switch connected to said address server and said terminals, said server address management system comprising: an address management section included in said switch, said address management section manages the address of said address server; and an address processing section included in each of said terminals and said address server, said address processing section registers and obtains the address of said address server, wherein said address processing section included in said address server, sends the address of said address server to said switch and said address management section of said switch registers the received address of said address server in a first table, wherein said address processing section, included in each terminal, sends the address of said terminal to said switch, wherein said address management section, included in said switch, in response to the address of said terminal sent from said terminal, registers the address of said terminal in said first table, and in response, sends the address of said address server stored in said first table to said terminal, and wherein said terminal, in response to the address of said address server sent from said switch, registers the address of the address server in a second table included in said terminal, and when an address of another terminal is required, sends a request for the address of said another terminal to said address server using the address of said address server stored in said second table.
Claim 3
Dependent Claim
69 words
A server address management system according to claim 1, further comprising: an address table included in said address server; wherein said address processing section of each terminal sends the address of said terminal to said address server using the address of said address server registered in said second table; and wherein said address processing section of said address server registers the address from said terminal in said address table.
Claim 4
Dependent Claim
110 words
A server address management system according to claim 1, wherein said first table of said address management section of said switch is a logical network table in which each terminal is registered in a logical network wherein terminals in a network are logically grouped; and said address management section registers and manages the addresses of said address server and each terminal in units of logical network and when said address management section receives the address of the terminal from the address processing section of said terminal, said address management section sends the address of an address server which belongs to the same logical network as said terminal to said terminal.
Claim 5
Dependent Claim
122 words
A server address management system according to claim 3, wherein said address management section comprises: a table processing section which performs the functions of initializing, registering, updating and retrieving with respect to said logical network table; and a request processing section which sends or receives a request to/from each terminal; and wherein said request processing section receives the address of a terminal sent from the terminal when it is activated, said table processing section registers the received address of the terminal and retrieves an address server which belongs to the same logical network as the logical network to which the terminal belongs, and when said address server exists, said request processing section sends the address of said address server to the terminal.
Claim 6
Dependent Claim
135 words
A server address management system according to claim 3, wherein said address management section comprises: a table processing section which retrieves information indicating whether an address server is already registered in said logical network table; and a request processing section which sends the address of the address server indicated by said information as a result of the retrieval to each terminal; and said request processing section receives the address of said address server from the address server when it is activated, said table processing section registers the received address of the address server and retrieves an already registered terminal which belongs to the same logical network as the logical network to which the address server belongs, and when said terminal exists, said request processing section sends the address of said address server to said terminal.
Claim 7
Dependent Claim
82 words
A server address management system according to claim 3, wherein if said switch detects that a failure has occurred in said address server, said address management section selects an arbitrary one of said terminals connected to said switch, requests said selected terminal to substitute for said address server that has failed and when said address management section receives a response showing that substitution has been enabled, informs the other terminals in the same logical network of the change of an address server.
Claim 8
Dependent Claim
67 words
A server address management system according to claim 6, wherein when said address management section receives a response showing that substitution has been disabled from said selected terminal, said address management section sequentially selects another one of the other terminals connected to the switch and requests said selected terminal to substitute until a response has been received indicating that substitution has been enabled from said selected terminal.
Claim 9
Dependent Claim
65 words
A server address management system according to claim 7, wherein if said switch detects that said failure of said address server has been recovered, said address management section requests said selected terminal which substitutes for the address server in which a failure has occurred to finish substitute processing and informs the other terminals in the same logical network of the change of an address server.
Claim 10
Dependent Claim
65 words
A server address management system according to claim 6, wherein if said switch detects that said failure of said address server has been recovered, said address management section requests said selected terminal which substitutes for the address server in which a failure has occurred to finish substitute processing and informs the other terminals in the same logical network of the change of an address server.
Claim 11
Dependent Claim
88 words
A server address management system according to claim 3, wherein if said switch detects that a failure has occurred in said address server, said address management section selects one of a plurality of address servers in another logical network connected to said switch and requests the selected address server to substitute for said address server and when said address management section receives a response showing that substitution is enabled, said address management section informs the other terminals in the same logical network of the change of address server.
Claim 12
Dependent Claim
64 words
A server address management system according to claim 10, wherein if said switch detects that said failure of said address server has been recovered, said address management section requests said selected address server which substitutes for the address server in which a failure has occurred to finish substitution and informs the other terminals in the same logical network of the change of address server.
Claim 13
Dependent Claim
86 words
A server address management system according to claim 1, wherein said address processing section comprises: an address server table which stores the address of said address server as said second table, sends the address of a terminal within which said address processing section is included when said terminal is activated to said switch, stores the address sent from said switch of said address server in said address server table and obtains the address of said address server from said switch only when a terminal is activated.
Claim 14
Dependent Claim
63 words
A server address management system according to claim 1, wherein said address processing section comprises: an address server table which stores the address of said address server as said second table, receives information that the address of said address server has changed from said switch, and updates the contents of said address server table when the address of said address server has changed.
Claim 15
Independent Claim
171 words
A method of managing an address of an address server in a nonbroadcast system type communication system including an address server for collectively managing addresses of a plurality of terminals and a switch connected to said address server and said terminals, said method comprising the steps of: sending from said address server the address of said address server to said switch; registering in said switch the received address of said address server in a first table; sending from each terminal the address of said terminal to said switch; receiving in said switch the address of each terminal from said terminal; registering in said switch said address of said each terminal in said first table; sending from said switch the address of said address server stored in said first table to each terminal for use by said terminal when sending a request to said address server requesting an address of another terminal; and registering, in a second table included in each terminal the address sent from said switch of said address server.
Claim 16
Independent Claim
171 words
A method of managing an address of an address server in a nonbroadcast system type communication system including an address server for collectively managing addresses of a plurality of terminals and a switch connected to said address server and said terminals, said method comprising the steps of: sending from said address server the address of said address server to said switch; registering in said switch the received address of said address server in a first table; sending from each terminal the address of said terminal to said switch; receiving in said switch the address of each terminal from said terminal; registering in said switch said address of said each terminal in said first table; sending from said switch the address of said address server stored in said first table to each terminal for use by said terminal when sending a request to said address server requesting an address of another terminal; and registering, in a second table included in each terminal the address sent from said switch of said address server.
Claim 17
Dependent Claim
52 words
A method according to claim 14, further comprising the steps of: sending from each terminal the address of said terminal to said address server using the address of said address server registered in said second table; and registering the address from said terminal in an address table included in said address server.
Claim 18
Dependent Claim
101 words
A method according to claim 14, wherein said first table of said switch is a logical network table in which each terminal is registered in a logical network wherein terminals in a network are logically grouped; and wherein said method further comprises the steps of: registering and managing, in said switch, the addresses of said address server and each terminal in units of logical network; and when said switch receives the address of a terminal from said terminal, sending from said switch the address of an address server which belongs to the same logical network as said terminal to said terminal.
Claim 19
Dependent Claim
112 words
A method according to claim 16, further comprising the steps of: performing in said switch the functions of initializing, registering, updating and retrieving with respect to said logical network table; sending or receiving in said switch a request to/from each terminal; receiving in said switch the address of a terminal sent from said terminal when said terminal is activated; registering in said switch the received address of said terminals and retrieving an address of an address server which belongs to the same logical network as the logical network to which said terminal belongs; and when said address server exists, sending from said switch the address of said address server to said terminal.
Claim 20
Dependent Claim
122 words
A method according to claim 16, further comprising the steps of: retrieving in said switch information indicating whether an address server is already registered in said logical network table; sending from said switch to each terminal the address of the address server indicated by said information as a result of the retrieval; receiving in said switch the address of said address server from the address server when it is activated; registering in said switch the received address of the address server and retrieving an already registered terminal which belongs to the same logical network as the logical network to which the address server belongs; and when said terminal exists, sending from said switch to said terminal the address of said address server.
Claim 21
Dependent Claim
83 words
A method according to claim 16, further comprising the steps of: detecting whether a failure has occurred in said address server; when a failure has occurred in said address server, selecting an arbitrary one of said terminals connected to said switch; requesting said selected terminal to substitute for said address server that has failed; and when a response has been received indicating that substitution has been enabled, informing the other terminals in the same logical network of the change of an address server.
Claim 22
Dependent Claim
65 words
A method according to claim 19, wherein when a response has been received indicating that substitution has been disabled from said selected terminal, sequentially selecting another one of the other terminals connected to the switch; and requesting said selected terminal to substitute for said address server that has failed until a response has been received indicating that substitution has been enabled from said selected terminal.
Claim 23
Dependent Claim
54 words
A method according to claim 20, wherein when said failure of said address server has been recovered, requesting said selected terminal which substitutes for the address server in which a failure has occurred to finish substitute processing; and informing the other terminals in the same logical network of the change of an address server.
Claim 24
Dependent Claim
54 words
A method according to claim 19, wherein when said failure of said address server has been recovered, requesting said selected terminal which substitutes for the address server in which a failure has occurred to finish substitute processing; and informing the other terminals in the same logical network of the change of an address server.
Claim 25
Dependent Claim
87 words
A method according to claim 16, further comprising the steps of: detecting whether a failure has occurred in said address server; when a failure has occurred in said address server, selecting one of a plurality of address servers in another logical network connected to said switch; requesting the selected address server to substitute for said address server that has failed, and when a response has been received indicating that substitution is enabled, informing the other terminals in the same logical network of the change of address server.
Claim 26
Dependent Claim
54 words
A method according to claim 23, wherein when said failure of said address server has been recovered, requesting said selected address server which substitutes for the address server in which a failure has occurred to finish substitute processing; and informing the other terminals in the same logical network of the change of address server.
Claim 27
Dependent Claim
94 words
A method according to claim 14, wherein an address server table is provided in each terminal and address server as said second table, said address server table stores the address of said address server, wherein said method further comprises the steps of: sending the address of a terminal within which said address server table is included when said terminal is activated; storing in said address server table the address sent from said switch of said address server; and obtaining the address of said address server from said switch only when a terminal is activated.
Claim 28
Dependent Claim
74 words
A method according to claim 14, wherein an address server table is provided in each terminal and address server as said second table, said address server table stores the address of said address server, wherein said method further comprises the steps of: receiving from said switch information that the address of said address server has changed; and updating the contents of said address server table when the address of said address server has changed.
Claim 29
Dependent Claim
160 words
A switch for use in a nonbroadcast system type communication system including an address server for collectively managing addresses of a plurality of terminals, said switch, being connected to said address server and said terminals conducting communications between said terminals, and said address server and said terminals, said switch comprising: a plurality of communication ports each being connected to one of said address server and said terminals; and an address management section which manages the address of said server, wherein said address management section receives an address of said address server from said address server, registers said address of said address server in a first table, receives an address of each terminal from said terminal, registers said address of said terminal in said first table and sends said address of said address server stored in said first table to each terminal for use by said terminal when sending a request to said address server requesting an address of another terminal.
Claim 30
Dependent Claim
160 words
A switch for use in a nonbroadcast system type communication system including an address server for collectively managing addresses of a plurality of terminals, said switch, being connected to said address server and said terminals conducting communications between said terminals, and said address server and said terminals, said switch comprising: a plurality of communication ports each being connected to one of said address server and said terminals; and an address management section which manages the address of said server, wherein said address management section receives an address of said address server from said address server, registers said address of said address server in a first table, receives an address of each terminal from said terminal, registers said address of said terminal in said first table and sends said address of said address server stored in said first table to each terminal for use by said terminal when sending a request to said address server requesting an address of another terminal.
Claim 31
Dependent Claim
59 words
A switch according to claim 27, wherein each of said terminals and said address server comprises: an address processing section, wherein said address processing section included in said address server, sends said address of said address server to said switch, and wherein said address processing section included in each terminal sends said address of said terminal to said switch.
Claim 32
Dependent Claim
66 words
A switch according to claim 28, further comprising: an address table included in said address server; wherein said address processing section of each terminal sends the address of said terminal to said address server using the address of said address server registered in said second table; and wherein said address processing section of said address server registers the address from said terminal in said address table.
Claim 33
Dependent Claim
107 words
A switch according to claim 28, wherein said first table of said address management section of said switch is a logical network table in which each terminal is registered in a logical network wherein terminals in a network are logically grouped; and said address management section registers and manages the addresses of said address server and each terminal in units of logical network and when said address management section receives the address of the terminal from the address processing section of said terminal, said address management section sends the address of an address server which belongs to the same logical network as said terminal to said terminal.
Claim 34
Dependent Claim
118 words
A switch according to claim 30, wherein said address management section comprises: a table processing section which performs the functions of initializing, registering, updating and retrieving with respect to said logical network table; and a request processing section which sends or receives a request to/from each terminal; wherein said request processing section receives the address of a terminal sent from the terminal when it is activated, said table processing section registers the received address of the terminal and retrieves an address server which belongs to the same logical network as the logical network to which the terminal belongs, and when said address server exists, said request processing section sends the address of said address server to the terminal.
Claim 35
Dependent Claim
132 words
A switch according to claim 30, wherein said address management section comprises: a table processing section which retrieves information indicating whether an address server is already registered in said logical network table; and a request processing section which sends the address of the address server indicated by said information as a result of the retrieval to each terminal; wherein said request processing section receives the address of said address server from the address server when it is activated, said table processing section registers the received address of the address server and retrieves an already registered terminal which belongs to the same logical network as the logical network to which the address server belongs, and when said terminal exists, said request processing section sends the address of said address server to said terminal.
Claim 36
Dependent Claim
79 words
A switch according to claim 30, wherein if said switch detects that a failure has occurred in said address server, said address management section selects an arbitrary one of said terminals connected to said switch, requests said selected terminal to substitute for said address server that has failed and when said address management section receives a response showing that substitution has been enabled, informs the other terminals in the same logical network of the change of an address server.
Claim 37
Dependent Claim
64 words
A switch according to claim 33, wherein when said address management section receives a response showing that substitution has been disabled from said selected terminal, said address management section sequentially selects another one of the other terminals connected to the switch and requests said selected terminal to substitute until a response has been received indicating that substitution has been enabled from said selected terminal.
Claim 38
Dependent Claim
62 words
A switch according to claim 34, wherein if said switch detects that said failure of said address server has been recovered, said address management section requests said selected terminal which substitutes for the address server in which a failure has occurred to finish substitute processing and informs the other terminals in the same logical network of the change of an address server.
Claim 39
Dependent Claim
62 words
A switch according to claim 33, wherein if said switch detects that said failure of said address server has been recovered, said address management section requests said selected terminal which substitutes for the address server in which a failure has occurred to finish substitute processing and informs the other terminals in the same logical network of the change of an address server.
Claim 40
Dependent Claim
85 words
A switch according to claim 30, wherein if said switch detects that a failure has occurred in said address server, said address management section selects one of a plurality of address servers in another logical network connected to said switch and requests the selected address server to substitute for said address server and when said address management section receives a response showing that substitution is enabled, said address management section informs the other terminals in the same logical network of the change of address server.
Claim 41
Dependent Claim
61 words
A switch according to claim 37, wherein if said switch detects that said failure of said address server has been recovered, said address management section requests said selected address server which substitutes for the address server in which a failure has occurred to finish substitution and informs the other terminals in the same logical network of the change of address server.
Claim 42
Dependent Claim
70 words
A switch according to claim 38 wherein each of said terminals and each of said address servers comprises: an address processing section, wherein said address processing section included in each address server sends said address of said address server to a switch connected to said address server, and wherein said address processing section included in each terminal sends said address of said terminal to a switch connected to said terminal.
Claim 43
Dependent Claim
32 words
A method according to claim 38, further comprising the steps of: sending from said address server the address of said address server; and sending from each terminal the address of said terminal.
Claim 44
Dependent Claim
83 words
A switch according to claim 28, wherein said address processing section comprises: an address server table which stores the address of said address server as said second table, sends the address of a terminal within which said address processing section is included when said terminal is activated to said switch, stores the address sent from said switch of said address server in said address server table and obtains the address of said address server from said switch only when a terminal is activated.
Claim 45
Dependent Claim
60 words
A switch according to claim 28, wherein said address processing section comprises: an address server table which stores the address of said address server as said second table, receives information that the address of said address server has changed from said switch, and updates the contents of said address server table when the address of said address server has changed.
Claim 46
Dependent Claim
227 words
A nonbroadcast system type communication system including a plurality of address servers for collectively managing addresses of a plurality of terminals and a plurality of switches each being connected to at least one of said address servers and at least one of said terminals, each switch conducting communications with the other switches and between said at least one address server and said at least one terminal and between said terminals connected to said switch, said switch comprising: a plurality of communication ports each being connected to one of said switches, at least one address server and at least one terminal; and an address management section which manages an address of said at least one address server, wherein said address management section receives said address of said at least one address server from said at least one address server, registers said address of said at least one address server in a first table, receives an address of said at least one terminal from said at least one terminal, registers said address of said at least one terminal in said first table and sends said address of said at least one address server stored in said first table to said at least one terminal for use by said at least one terminal when sending a request to said at least one address server requesting an address of another terminal.
Claim 47
Dependent Claim
227 words
A nonbroadcast system type communication system including a plurality of address servers for collectively managing addresses of a plurality of terminals and a plurality of switches each being connected to at least one of said address servers and at least one of said terminals, each switch conducting communications with the other switches and between said at least one address server and said at least one terminal and between said terminals connected to said switch, said switch comprising: a plurality of communication ports each being connected to one of said switches, at least one address server and at least one terminal; and an address management section which manages an address of said at least one address server, wherein said address management section receives said address of said at least one address server from said at least one address server, registers said address of said at least one address server in a first table, receives an address of said at least one terminal from said at least one terminal, registers said address of said at least one terminal in said first table and sends said address of said at least one address server stored in said first table to said at least one terminal for use by said at least one terminal when sending a request to said at least one address server requesting an address of another terminal.
Claim 48
Independent Claim
114 words
A method of performing switching functions in a nonbroadcast system type communication system including an address server for collectively managing addresses of a plurality of terminals, said method performed by a switching apparatus and comprising the steps of: receiving an address of each terminal from said terminals; registering said address of said terminal in a first table; receiving an address of said address server from said address server; registering said address of said address server in said first table; and sending said address of said address server stored in said first table to said terminal for use by said terminal when sending a request to said address server requesting an address of another terminal.
Claim 49
Independent Claim
114 words
A method of performing switching functions in a nonbroadcast system type communication system including an address server for collectively managing addresses of a plurality of terminals, said method performed by a switching apparatus and comprising the steps of: receiving an address of each terminal from said terminals; registering said address of said terminal in a first table; receiving an address of said address server from said address server; registering said address of said address server in said first table; and sending said address of said address server stored in said first table to said terminal for use by said terminal when sending a request to said address server requesting an address of another terminal.
Claim 50
Dependent Claim
139 words
A computer program stored on a storage medium executable by a switching apparatus for performing switching functions in a nonbroadcast system type communication system including an address server for collectively managing addresses of a plurality of terminals, said switching apparatus being connected to said address server and said terminals, said computer program when executed causes said switching apparatus to perform the steps of: receiving an address of each terminal from said terminals; registering said address of said terminal in a first table; receiving an address of said address server from said address server; registering said address of said address server in said first table; and sending said address of said address server stored in said first table to said terminal for use by said terminal when sending a request to said address server requesting an address of another terminal.
Claim 51
Dependent Claim
139 words
A computer program stored on a storage medium executable by a switching apparatus for performing switching functions in a nonbroadcast system type communication system including an address server for collectively managing addresses of a plurality of terminals, said switching apparatus being connected to said address server and said terminals, said computer program when executed causes said switching apparatus to perform the steps of: receiving an address of each terminal from said terminals; registering said address of said terminal in a first table; receiving an address of said address server from said address server; registering said address of said address server in said first table; and sending said address of said address server stored in said first table to said terminal for use by said terminal when sending a request to said address server requesting an address of another terminal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-01-10 | 2003-07-12 | 2004-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-01-10 | 2007-07-12 | 2008-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-01-10 | 2011-07-12 | 2012-01-11 | $7700.00 | Window Closed / Lapsed |