Patent EP0695059A1 successfully refreshed from Google Patents.
EP0695059A1
Expired / Lapsed
EP
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Wireless lan to wired lan bridge
Assignee: International Business Machines Corp
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Filing: 1995-07-20
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Granted: —
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Expires: 2015-07-20
Abstract
Abstract An internetworking node (AP) for providing internetworking services for mobile wireless nodes (A-E) is disclosed. Each mobile wireless node is registered with at the most one internetworking node. Each mobile wireless node emits a topology broadcast identifying itself and other nodes it has heard. Each internetworking node uses these topology broadcasts to construct a table tracking each mobile node within its range, whether that mobile node is registered to that internetworking node and also a list of which other nodes that mobile wireless node can hear. The internetworking node determines which of these wireless nodes it will register. The internetworking node will then act for all wireless nodes registered to it in relaying messages between wireless nodes or between a wired LAN (50) and the wireless nodes.
Inventors
- 👤 Roger Y. M. Cheung
- 👤 Peter Eric Reissner
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 15:52
CPC Classifications
H; H04; H04W; H04W84/00; H04W84/18; H04W84/20; H04W40/00; H04W40/24; H04W92/00; H04W92/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
74 words
An internetworking node comprising: means to send data to wireless nodes and to receive data from wireless nodes; means to recognize and store received data which comprises messages from at least one wireless node containing information as to the network address of such node and the other nodes from which said can receive data; and means to cause said sending means periodically to broadcast information as to the network address of the control node.
Claim 2
Dependent Claim
93 words
A wireless node for use in a network, comprising: means to send data to wireless nodes and receive data from wireless nodes; means to recognize and store received data which comprises a message from at least one other wireless node containing information as to the address of such other wireless node; and means to cause said sending means at the end of a period to broadcast its own network address and a list of the network addresses of any other wireless nodes from which it has received a said message within the period.
Claim 3
Dependent Claim
170 words
A network comprising: (a) a plurality of wireless nodes including at least a first and a second wireless node, each of which comprises: means to send data to other wireless nodes and receive data from other wireless nodes, means to recognize and store received data which comprises a message from at least one other wireless node containing information as to the address of such other wireless node, and means to cause said sending means at the end of a period to broadcast its own network address and a list of the network addresses of any other wireless nodes from which it has received a said message within the period; (b) an internetworking node comprising: means to send data to wireless nodes and to receive data from wireless nodes, and means to recognize and store received data which comprises broadcast messages from wireless nodes containing information as to the network address of each such node and the other nodes from which it has received a said message within the said period.
Claim 4
Dependent Claim
103 words
A network as claimed in claim 3, in which said internetworking node includes means to intercept data transmissions from said first wireless node to said second wireless node, means to access its stored messages from said second node, means to determine from said stored messages whether said second node has received data from the first node within the predetermined period prior to the last said broadcast message sent by the second node, and means for forwarding, by the internetworking node, the data transmissions if the message indicates that the second node has not received data from the first node during such predetermined period.
Claim 5
Dependent Claim
32 words
A network as claimed in claim 3, additionally comprising means to cause said internetworking node sending means at least once during each said period to broadcast identification information identifying the internetworking node.
Claim 6
Dependent Claim
24 words
A network as claimed in claim 5, in which said internetworking node is connected to a wired LAN as a node on said LAN.
Claim 7
Dependent Claim
53 words
A network as claimed in claim 6, in which said internetworking node has means to register those wireless nodes which have broadcast a message, means to recognize data on the wired network which is addressed to a node which has been registered, and means for wireless retransmission of such data to that node.
Claim 8
Dependent Claim
93 words
A network as claimed in claim 6, in which said internetworking node has means for storing the address of wireless nodes for wireless nodes which the internetworking node has received a broadcast during the period, means for storing the list which each of the said wireless nodes also broadcasts, means to register those wireless nodes, means to recognize data transmitted by a registered wireless node and which is addressed to a node which is not a wireless node which is not listed, and means for retransmission of such data on the wired LAN.
Claim 9
Dependent Claim
78 words
A network as claimed in either of claims 7 or 8, and having a plurality of internetworking nodes, means for establishing a hierarchy of internetworking nodes, and means for causing each internetworking node not to register wireless nodes which have broadcast a message confirming that they have received identification information from that internetworking node, if such wireless node also broadcasts a message showing that it has received identification information from a internetworking node more senior in the hierarchy.
Claim 10
Independent Claim
130 words
A method for internetworking between wireless nodes comprising the steps of: sending and receiving data between wireless nodes, including internetworking nodes; recognizing and storing received data which comprises a message from at least one other wireless node containing information as to the address of such other wireless node, and broadcasting, by each wireless node, at the end of a period, its own network address and a list of the network addresses of any other wireless nodes from which it has received a said message within the period; recognizing and storing, by said internetworking nodes received data which comprises broadcast messages from wireless nodes containing information as to the network address of each such node and the other nodes from which it has received a said message within the said period.
Claim 11
Dependent Claim
86 words
The method as claimed in claim 10 further comprising the following steps carried out by the internetworking node: storing the address of wireless nodes for wireless nodes which the internetworking node has received a broadcast during the period; storing the list which each of the said wireless nodes also broadcasts; registering, some, none, or all of those wireless nodes; recognizing data transmitted by a registered wireless node and which is addressed to a node which is not listed; retransmitting of such data on the wired LAN.
Claim 12
Independent Claim
71 words
A method as claimed in either of claims 10 or 11, comprising additional steps of establishing a hierarchy of internetworking nodes, and causing each internetworking node not to register wireless nodes which have broadcast a message confirming that they have received identification information from that internetworking node, if such wireless node also broadcasts a message showing that it has received identification information from a internetworking node more senior in the hierarchy.
References Cited (Backward Citations)
No citation records indexed.
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