[특허]Access technique of channel hopping communications system

[미국특허] Access technique of channel hopping communications system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04L-027/30 A61F-002/06 H04Q-007/20
출원번호	US-0168604 (1998-10-09)
발명자 / 주소	Jacobus C. Haartsen NL
출원인 / 주소	Telefonaktiebolaget LM Ericsson (publ) SE
대리인 / 주소	Burns, Doane, Swecker & Mathis, L.L.P.
인용정보	피인용 횟수 : 15 인용 특허 : 13

초록 ▼

Establishing a connection between a paging unit and a standby unit in a channel hopping communications system includes activating the standby unit for an activation time period out of every standby time period. During each activation time period, the standby unit monitors a selected channel for receipt of a paging message. The selected channel is selected from a plurality of channels, and, for each subsequent activation time period, the selected channel is a subsequent one of the plurality of channels as specified by a hopping sequence and an internal clock. A page train is repeatedly transmitted from the paging unit to the standby unit, until a response is received from the standby unit. Each page train includes a plurality of paging messages, each paging message being transmitted on a different one of a subset of the plurality of channels. Selection of a page train for transmission by the paging unit may be based on an estimate of the standby unit's internal clock. The generation of page trains can be further optimized for those cases in which more than two page trains will be transmitted. The purpose of the optimization is to generate page trains that, when transmitted, are most likely to elicit an early response from the paged unit.

대표청구항 ▼

1. A method for establishing a connection between a paging unit and a standby unit in a channel hopping communications system, the method comprising the steps of:activating the standby unit for an activation time period, Twake, out of every standby time period, Tstandby; during each activation time period, causing the standby unit to monitor a selected channel for receipt of a paging message, wherein the selected channel is selected from a plurality of channels, and wherein, for each subsequent activation time period, the selected channel is a subsequent one of the plurality of channels as specified by a hopping sequence; during a first repetition period, repeatedly transmitting a first page train from the paging unit to the standby unit, until a response is received from the standby unit; and if the response is not received from the standby unit during the first repetition period, then during each of one or more subsequent repetition periods, repeatedly transmitting a corresponding one of one or more subsequent page trains from the paging unit to the standby unit until the response is received from the standby unit, wherein: each of the first and subsequent page trains comprises a plurality of paging messages, each paging message being transmitted on a different one of a subset of the plurality of channels; the first page train is transmitted on a subset of channels that are selected from the hopping sequence, wherein the selected channels include a hop frequency associated with an expected wake-frequency and one or more different hop frequencies that are nearest the expected wake-frequency in the hopping sequence, and wherein non-selected channels in the hopping sequence constitute one or more remaining portions of the hopping sequence; and each of the one or more subsequent page trains is transmitted on a respectively different subset of channels that are selected from those channels that are nearest the expected wake-frequency in successively remaining portions of the hopping sequence.

이 특허에 인용된 특허 (13) 인용/피인용 타임라인 분석

Haartsen Jacobus C.,SEX ; Dent Paul W., Access technique of channel hopping communications system.
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Nealon William J. ; Rajan Heidi Anne, Cordless telephone arranged for operating with multiple portable units in a frequency hopping system.
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Gillis Mark E. (Eatontown NJ) Leland Kenneth W. (Toms River NJ) Nealon William J. (Ocean Grove NJ) Yu Hon (Aberdeen NJ), Cordless telephone arranged for operation in a frequency hopping system.
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Foster ; Jr. Robert B. (Bellevue WA), Cordless telephone system having automatic control of transmitter power and frequency in response to changing conditions.
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Fulghum Tracy L. (Sunrise FL) Cadd Jimmy W. (Coral Springs FL), Method and apparatus for a radio communication system.
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Rabain Jacques (Paris FRX) Swaenepoel Joseph (Paris FRX), Method of synchronization of transmitter-receiver stations of a frequency-jumping network and a station for the practica.
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Haartsen Jacobus Cornelis,SEX, Methods and systems for concurrent receipt of incoming calls from a wide area cellular network and a private radio commu.
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Haartsen Jacobus Cornelis,SEX, Methods and systems for mobile terminal assisted handover in an private radio communications network.
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Massingill Larry William ; Reinhold Stan L. ; Weiss Richard E. ; Solve Torbjorn Wilson, Methods and systems for reduced power operation of cellular mobile terminals.
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O\Connor Roger J. (Garden Grove CA) Lane Keith A. (Huntington Beach CA), Rapid frequency-hopping time synchronization.
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Hasegawa Takaaki (Kawaguchi JPX), Spread spectrum communication system.
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Paneth Eric,ILX ; Handzel Mark J. ; Morley Steven Allan ; Avis Graham M., Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or.
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Bilgic Murat I. ; Menon Narayan P., Wireless local loop system and method.
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이 특허를 인용한 특허 (15) 인용/피인용 타임라인 분석

Lee, Dai Yun; Lee, Han Sang; Han, Sang Soo, Electro-luminescence display device and driving apparatus thereof.
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Lee, Dai Yun; Lee, Han Sang; Han, Sang Soo, Electro-luminescence display device and driving apparatus thereof.
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Jones,Huw Bryn, Low power RC clocking system for wireless communications.
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Spencer,Adrian G.; Marshall,Paul R.; Sayers,Anthony D., Method and apparatus for synchronizing frequency hopping transceivers.
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Haartsen,Jacobus, Methods and apparatus for adapting a hop sequence when establishing a communication connection.
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Partyka, Andrzej, Overhead reduction in system for intermittent transmission.
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Kumar,Apurva; Shorey,Rajeev, Reduction of device discovery delays in frequency hopping-based ad-hoc networks.
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Trott, Mitchell D., Repetitive paging from a wireless data base station having a smart antenna system.
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Trott,Mitchell D., Repetitive paging from a wireless data base station having a smart antenna system.
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Barratt,Craig H.; Trott,Mitchell D.; Uhlik,Christopher R., Resource allocation in a wireless network.
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Barratt,Craig H.; Trott,Mitchell D.; Uhlik,Christopher R., Resource allocation in a wireless network.
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Partyka, Andrzej, Synchronization and access of the nodes in a communications network.
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Partyka,Andrzej, Telemetry system with authentication.
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Partyka, Andrzej, Transmission of urgent messages in telemetry system.
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Partyka,Andrzej, Urgent messages and power-up in frequency hopping system for intemittent transmission.
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A	생활필수품
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[미국특허] Access technique of channel hopping communications system 원문보기