Communication network having a plurality of bridging nodes which transmit a beacon to terminal nodes in power saving state that it has messages awaiting delivery
DC CAFC
First Claim
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1. A communication network supporting wireless communication of messages, said communication network comprising:
- a first terminal node having a wireless receiver operable in a normal state;
a second terminal node having a wireless receiver operable in a power saving state;
an access point that attempts to immediately deliver messages destined for the first terminal node;
the access point attempts to deliver messages destined for the second terminal node by transmitting at predetermined intervals beacons that identify that a message awaits delivery;
the second terminal node synchronizes operation of its wireless receiver to receive the beacons from the access point; and
the second terminal node determines from the received beacons that it has a message awaiting delivery and directs further operation of its wireless receiver to receive the message.
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Abstract
An apparatus and a method for routing data in a radio data communication system having one or more host computers, one or more intermediate base stations, and one or more RF terminals organizes the intermediate base stations into an optimal spanning-tree network to control the routing of data to and from the RF terminals and the host computer efficiently and dynamically. Communication between the host computer and the RF terminals is achieved by using the network of intermediate base stations to transmit the data.
348 Citations
31 Claims
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1. A communication network supporting wireless communication of messages, said communication network comprising:
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a first terminal node having a wireless receiver operable in a normal state;
a second terminal node having a wireless receiver operable in a power saving state;
an access point that attempts to immediately deliver messages destined for the first terminal node;
the access point attempts to deliver messages destined for the second terminal node by transmitting at predetermined intervals beacons that identify that a message awaits delivery;
the second terminal node synchronizes operation of its wireless receiver to receive the beacons from the access point; and
the second terminal node determines from the received beacons that it has a message awaiting delivery and directs further operation of its wireless receiver to receive the message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A communication network supporting wireless communication of messages, said communication network comprising:
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a first terminal node operating in a first state;
a second terminal node operating in a second state in which attempts are made to minimize power consumption by the wireless receiver a bridging node having a wireless transceiver to support wireless communication to the first and second terminal nodes;
the bridging node attempts to deliver messages destined for the second terminal node by transmitting at predetermined intervals beacons that identify a message awaiting delivery;
the second terminal node synchronizing operation of its wireless receiver to receive the beacons from the bridging node and determining from the received beacons that it has a message awaiting delivery and responding to an awaiting message by directing further operation of its wireless receiver to receive the message; and
the bridging node delivering messages to the first terminal node without requiring the first terminal node to determine from the beacons that it has messages awaiting delivery. - View Dependent Claims (17, 18, 19)
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20. A communication network supporting wireless communication of messages, said communication network comprising:
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a first node having a wireless transceiver;
a second node having a wireless transceiver;
said first node wirelessly transmitting at periodic intervals to accommodate delivery of messages from said first node to said second node; and
said second node selectively either entering and remaining in a low power state between the transmissions at periodic intervals or entering and remaining in a low power state between any two of the transmissions at periodic intervals that are nonconsecutive. - View Dependent Claims (21, 22, 23, 24, 25)
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26. A communication network supporting wireless communication of messages, said communication network comprising:
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a first node having a wireless transceiver;
a second node having a wireless receiver;
said first node wirelessly transmitting at timed intervals to accommodate delivery of messages from said first node to said second node; and
said second node synchronizing with the timed intervals to selectively enter and remain in a low power state either one of between consecutive transmissions at periodic intervals and between nonconsecutive transmissions at periodic intervals. - View Dependent Claims (27, 28, 29, 30, 31)
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Specification
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Litigation Data
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Current AssigneeInnovatio IP Ventures LLC
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Original AssigneeIntermec IP Corporation (Honeywell International Inc.)
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InventorsLuse, Ronald E., Mahany, Ronald L., Meier, Robert C.
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Primary Examiner(s)Lee, Thomas
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Assistant Examiner(s)PEYTON, TAMMARA R
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Application NumberUS09/060,287Time in Patent Office1,463 DaysField of Search710/18, 710/46, 713/320, 713/323, 713/324, 709/227, 709/304, 455/343, 455/524, 340/825.47, 370/311US Class Current710/18CPC Class CodesG06F 1/1626 with a single-body enclosur...G06F 15/0225 User interface arrangements...G06K 7/1098 the scanning arrangement ha...G08C 17/02 using a radio linkH01Q 1/007 specially adapted for indoo...H01Q 1/241 used in mobile communicatio...H01Q 21/24 Combinations of antenna uni...H04B 1/1615 Switching on; Switching off...H04B 1/3833 Hand-held transceiversH04B 1/69 Spread spectrum techniquesH04B 17/0085 using test signal generatorsH04B 17/318 Received signal strengthH04L 1/0003 by switching between differ...H04L 1/0007 by modifying the frame lengthH04L 1/0014 by adapting the source codingH04L 1/0025 Transmission of mode-switch...H04L 1/0071 Use of interleaving interle...H04L 1/08 by repeating transmission, ...H04L 12/12 Arrangements for remote con...H04L 2001/0097 RelaysView All
