US5598406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed data transfer over twisted pair cabling
Assignee: Hewlett Packard Development Co LP
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Filing: 1995-01-12
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Granted: 1997-01-28
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Expires: 2015-01-12
Abstract
Abstract A method for transmitting data packets, grouped as data octets, over a LAN having a central hub linked to each of a plurality of network nodes via a physical medium consisting of four pairs of unshielded twisted pair (UTP) cable. The transmission method sequentially divides the data into data quintets. The quintets are then arranged into blocks of data quintets and sequentially distributed into four individual serial code streams. The four serial code streams are sequentially scrambled to produce four streams of randomized quintets. The randomized data streams are sequentially block encoded into 6-bit symbol data which are then transmitted using NRZ modulation across the network by transmitting each data stream over one of said pairs of cable.
Inventors
- 👤 Alan Albrecht
- 👤 Steven H. Goody
- 👤 Michael P. Spratt
- 👤 Joseph A. Curcio, Jr.
- 👤 Daniel J. Dove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:25
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/14; H04L12/00; H04L12/28; H04L12/44; H04L25/38; H04L25/40; H04L25/49; H04L25/4906; H04L25/4908; H04L5/00; H04L5/14; H04L5/143; H04L12/40; H04L12/407; H04L12/413
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
346 words
In a local network system in which a hub is connected to each of a plurality of network nodes, a method for sending consecutive data packets to a first network node while allowing exchange of control signals between the hub and the first network node, the method comprising the steps of: (a) transmitting a first incoming control signal from the hub to the first network node to indicate to the first network node that a first data packet is about to be sent from the hub to the first network node; (b) transmitting the first data packet from the hub to the first network node, wherein transmission of the first data packet is performed using half-duplex transmission over all data channels between the hub and the first network node so that during the transmission of the first data packet the first network node is unable to transmit any information to the hub; (c) transmitting an idle control signal from the hub to each of the network nodes, wherein transmission of the idle control signal is performed using duplex transmission between the hub and the first network node so that during the transmission of the idle control signal the first network node is able to transmit information, including a send request, to the hub; including the substep of: (c.1) receiving at the hub any send request from the first network node and storing and scheduling the send request with any other received network node requests; (d) transmitting a second incoming control signal from the hub to the first network node to indicate to the first network node that a second data packet is about to be sent from the hub to the first network node; and, (e) transmitting the second data packet from the hub to the first network node, wherein transmission of the second data packet is performed using half-duplex transmission over all data channels between the hub and the first network node so that during the transmission of the second data packet the first network node is unable to transmit any information to the hub.
Claim 2
Dependent Claim
346 words
In a local network system in which a hub is connected to each of a plurality of network nodes, a method for sending consecutive data packets to a first network node while allowing exchange of control signals between the hub and the first network node, the method comprising the steps of: (a) transmitting a first incoming control signal from the hub to the first network node to indicate to the first network node that a first data packet is about to be sent from the hub to the first network node; (b) transmitting the first data packet from the hub to the first network node, wherein transmission of the first data packet is performed using half-duplex transmission over all data channels between the hub and the first network node so that during the transmission of the first data packet the first network node is unable to transmit any information to the hub; (c) transmitting an idle control signal from the hub to each of the network nodes, wherein transmission of the idle control signal is performed using duplex transmission between the hub and the first network node so that during the transmission of the idle control signal the first network node is able to transmit information, including a send request, to the hub; including the substep of: (c.1) receiving at the hub any send request from the first network node and storing and scheduling the send request with any other received network node requests; (d) transmitting a second incoming control signal from the hub to the first network node to indicate to the first network node that a second data packet is about to be sent from the hub to the first network node; and, (e) transmitting the second data packet from the hub to the first network node, wherein transmission of the second data packet is performed using half-duplex transmission over all data channels between the hub and the first network node so that during the transmission of the second data packet the first network node is unable to transmit any information to the hub.
Claim 3
Dependent Claim
57 words
A method as in claim 1 wherein in step (d) transmission of the second incoming control signal is performed using duplex transmission between the hub and the first network node so that during the transmission of the second incoming control signal the first network node is able to transmit information, including a send request, to the hub.
Claim 4
Dependent Claim
35 words
A method as in claim 2 wherein upon the hub receiving any send request from the first network node, the hub stores and schedules the send request along with any other received network node requests.
Claim 5
Dependent Claim
76 words
A method as in claim 1 wherein; the first network node is connected to the hub using a plurality of twisted wire pairs; and, in step (c) a first set of the plurality of twisted wire pairs is used to send control signals from the first network node to the hub and a second set of the plurality of twisted wire pairs is used to send control signals from the hub to the first network node.
Claim 6
Dependent Claim
309 words
In a local network system in which a hub is connected to each of a plurality of network nodes, a method for sending consecutive data packets to a first network node while allowing exchange of control signals between the hub and the first network node, the method comprising the steps of: (a) transmitting a first incoming control signal from the hub to the first network node to indicate to the first network node that a first data packet is about to be sent from the hub to the first network node; (b) transmitting the first data packet from the hub to the first network node, wherein transmission of the first data packet is performed using half-duplex transmission over all data channels between the hub and the first network node so that during the transmission of the first data packet the first network node is unable to transmit any information to the hub; (c) transmitting a second incoming control signal from the hub to each of the network nodes, wherein transmission of the second incoming control signal is performed using duplex transmission between the hub and the first network node so that during the transmission of the second incoming control signal the first network node is able to transmit information, including a send request, to the hub; including the substep of: (c.1) receiving at the hub any send request from the first network node and storing and scheduling the send request with any other received network node requests; and, (d) transmitting the second data packet from the hub to the first network node, wherein transmission of the second data packet is performed using half-duplex transmission over all data channels between the hub and the first network node so that during the transmission of the second data packet the first network node is unable to transmit any information to the hub.
Claim 7
Dependent Claim
309 words
In a local network system in which a hub is connected to each of a plurality of network nodes, a method for sending consecutive data packets to a first network node while allowing exchange of control signals between the hub and the first network node, the method comprising the steps of: (a) transmitting a first incoming control signal from the hub to the first network node to indicate to the first network node that a first data packet is about to be sent from the hub to the first network node; (b) transmitting the first data packet from the hub to the first network node, wherein transmission of the first data packet is performed using half-duplex transmission over all data channels between the hub and the first network node so that during the transmission of the first data packet the first network node is unable to transmit any information to the hub; (c) transmitting a second incoming control signal from the hub to each of the network nodes, wherein transmission of the second incoming control signal is performed using duplex transmission between the hub and the first network node so that during the transmission of the second incoming control signal the first network node is able to transmit information, including a send request, to the hub; including the substep of: (c.1) receiving at the hub any send request from the first network node and storing and scheduling the send request with any other received network node requests; and, (d) transmitting the second data packet from the hub to the first network node, wherein transmission of the second data packet is performed using half-duplex transmission over all data channels between the hub and the first network node so that during the transmission of the second data packet the first network node is unable to transmit any information to the hub.
Claim 8
Dependent Claim
76 words
A method as in claim 5 wherein: the first network node is connected to the hub using a plurality of twisted wire pairs; and, in step (c) a first set of the plurality of twisted wire pairs is used to send control signals from the first network node to the hub and a second set of the plurality of twisted wire pairs is used to send control signals from the hub to the first network node.
Claim 9
Dependent Claim
266 words
In a local network system in which a hub is connected to each of a plurality of network nodes, a method for sending consecutive data packets to a first network node while allowing exchange of control signals between the hub and the first network node, the method comprising the steps of: (a) transmitting the first data packet from the hub to the first network node, wherein transmission of the first data packet is performed using half-duplex transmission over all data channels between the hub and the first network node so that during the transmission of the first data packet the first network node is unable to transmit any information to the hub; (b) transmitting an idle control signal from the hub to each of the network nodes, wherein transmission of the idle control signal is performed using duplex transmission between the hub and the first network node so that during the transmission of the idle control signal the first network node is able to transmit information, including a send request, to the hub; including the substep of: (b.1) receiving at the hub any send request from the first network node and storing and scheduling the send request with any other received network node requests; and, (c) transmitting a second data packet from the hub to the first network node, wherein transmission of the second data packet is performed using half-duplex transmission over all data channels between the hub and the first network node so that during the transmission of the second data packet the first network node is unable to transmit any information to the hub.
Claim 10
Dependent Claim
266 words
In a local network system in which a hub is connected to each of a plurality of network nodes, a method for sending consecutive data packets to a first network node while allowing exchange of control signals between the hub and the first network node, the method comprising the steps of: (a) transmitting the first data packet from the hub to the first network node, wherein transmission of the first data packet is performed using half-duplex transmission over all data channels between the hub and the first network node so that during the transmission of the first data packet the first network node is unable to transmit any information to the hub; (b) transmitting an idle control signal from the hub to each of the network nodes, wherein transmission of the idle control signal is performed using duplex transmission between the hub and the first network node so that during the transmission of the idle control signal the first network node is able to transmit information, including a send request, to the hub; including the substep of: (b.1) receiving at the hub any send request from the first network node and storing and scheduling the send request with any other received network node requests; and, (c) transmitting a second data packet from the hub to the first network node, wherein transmission of the second data packet is performed using half-duplex transmission over all data channels between the hub and the first network node so that during the transmission of the second data packet the first network node is unable to transmit any information to the hub.
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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) | 2000-01-28 | 2000-07-29 | 2001-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-28 | 2004-07-29 | 2005-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-28 | 2008-07-29 | 2009-01-28 | $7700.00 | Window Closed / Lapsed |