Source: http://www.google.com/patents/US6633541?dq=6,977,809&ei=-AObT5vAOoSgiQL_5qznDg
Timestamp: 2017-01-17 03:58:50
Document Index: 518851121

Matched Legal Cases: ['art 23', 'art 23', 'art 23', 'art 23', 'art 23', 'art 23', 'art 23', 'art 23']

Patent US6633541 - Ascending transmission speed controlling method and communication system in ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsThe present invention aims at providing an ascending transmission speed controlling method and a communication system in an ATM-PON (asynchronous transfer mode-passive optical network), in which ascending transmission speeds on the PON are dynamically allocated corresponding to actual transmission states...http://www.google.com/patents/US6633541?utm_source=gb-gplus-sharePatent US6633541 - Ascending transmission speed controlling method and communication system in ATM-PON systemAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS6633541 B1Publication typeGrantApplication numberUS 09/476,732Publication dateOct 14, 2003Filing dateDec 30, 1999Priority dateMay 21, 1999Fee statusLapsedPublication number09476732, 476732, US 6633541 B1, US 6633541B1, US-B1-6633541, US6633541 B1, US6633541B1InventorsToshiyuki Hijikata, Toshio Irie, Kosuke Nobuyasu, Yoshinori MatsunagaOriginal AssigneeFujitsu LimitedExport CitationBiBTeX, EndNote, RefManPatent Citations (9), Referenced by (24), Classifications (17), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetAscending transmission speed controlling method and communication system in ATM-PON system
As shown in FIG. 10, a transmitting terminal of ABR channel performs transmission at an allowed cell rate (ACR) as an allowed transmission speed represented by an ordinate. Namely, upon starting transmission, the transmission is performed at an initial cell rate (ICR) which is an initial value of the ACR. Then, when the transmitting terminal has received a backward resource management (B-RM) cell via an ATM network, if a CI (Congestion Indication) as a congestion indicator and an NI (No Increase) indicating no increase of the transmission speed, both contained in the B-RM cell, are simultaneously 0 (zero), there is calculated a new ACR′ (AC R′=ACR+PCR×RIF) by multiplying PCR by a rate increase factor (RIF) and adding the obtained product to the current ACR. When this ACR′ is smaller than an explicit rate (ER) included in the received B-RM cell, it is possible to transmit data at the ACR′. When this ACR′ is larger than the ER, it is possible to transmit data at the ACR, by making ACR=ER.
Further, the CI of the received B-RM cell is 1, there is calculated a new ACR′ (ACR′=ACR−ACR×RDF) by multiplying ACR by a rate decrease factor (RDF) and subtracting the obtained product from the current ACR. When this ACR′ is smaller than the ER of the B-RM cell, it is possible to transmit data at the ACR′. When this ACR′ is larger than the ER, it is possible to transmit data at the ACR, by making ACR=ER. Further, when the NI of the received B-RM cell is 1, the transmission may be performed by maintaining the current ACR.
Concretely, the allocation of bands to ABR channel is performed in a manner basically identical with that shown in FIG. 10. Namely, the transmission grant controlling part 23 d refers to the content of the B-RM cell sent from the B-RM cell detecting part 23 c. When no congestion has occurred in the ATM network 1 and the increase of transmission speed is possible (i.e., CI=NI=0), the transmission grant controlling part 23 d calculates a new ACR′ (ACR′=ACR+PCR×RIF) by adding a value obtained by multiplying the peak cell rate (PCR) by a rate increase factor (RIF) to a current allowed cell rate (ACR), compares this ACR′ with an ER value included in the received B-RM cell, and then allocates the smaller one of them as a transmission speed to the ABR channel. When congestion has occurred in the ATM network 1 (i.e., CI=1), the transmission grant controlling part 23 d calculates a new ACR′ (ACR′=ACR−ACR×RDF) by subtracting a value obtained by multiplying the ACR by a rate decrease factor (RDF) from a current ACR, compares this ACR′ with an ER value of the B-RM cell, and then allocates the smaller one of them as a transmission speed to the ABR channel. Further, when the current transmission speed is to be maintained (i.e., NI=1), the current ACR itself is allocated as a transmission speed to the ABR channel.
The transmission grant controlling part 23 d also calculates the aforementioned transmission speed request to be transmitted to the RM cell creating part 23 e. Concretely, the transmission grant controlling part 23 d calculates a speed (ACR+PCR×RIF) by adding a product of PCR multiplied by RIF to the ACR, as the transmission speed request for GFR and UBR channels, and sends the request to the RM cell creating part 23 e, in which the ACR indicates an ascending transmission speed allocated in a manner identical with ABR channel. At this time, when the total speed of the respective active channels exceeds the maximum transmission speed on the PON, the ascending transmission speed is preferentially allocated to active ABR channels, and then there are reduced ACR's calculated as the transmission speeds to be allocated to active UBR channel and active GFR channel, to thereby avoid such a situation that the total transmission speed of the respective communication channels exceeds the maximum transmission speed on the PON.
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signalUS20020184644 *Jun 4, 2001Dec 5, 2002Lund Robert M.System for correlating a subscriber unit with a particular subscriber in a passive optical networkUS20030133460 *Nov 27, 2002Jul 17, 2003Min-Hyo LeeMethod for implementing various functions in gigabit ethernet-passive optical network system and structure of ethernet frame employed in the sameUS20030202481 *Mar 21, 2003Oct 30, 2003Pillar John FrankMethod and apparatus for auto detection of AAL5 type frames for VCC and VPC switchesUS20040202174 *May 10, 2001Oct 14, 2004Chan KimATM-PON ONU controlling apparatusUS20050152506 *Feb 24, 2005Jul 14, 2005Optical Solutions, Inc.System for correlating a subscriber unit with a particular subscriber in a passive optical networkUS20070224930 *Mar 16, 2005Sep 27, 2007Matsushita Electric Industrial Co., Ltd,Radio Base Station Apparatus and Data Transfer Control MethodUS20080187317 *Jan 29, 2008Aug 7, 2008Fujitsu LimitedTransmission system and transmission apparatusUS20090022494 *Sep 24, 2008Jan 22, 2009Sulin YangOptical network terminal, method for configuring rate limiting attributes of ports, and method for processing packetsUS20110019545 *Oct 1, 2010Jan 27, 2011Ciena CorporationMethod and apparatus for auto detection of aal5 type frames for vcc and vpc switchesCN101453672BApr 26, 2006Aug 7, 2013华为技术有限公司Optical network terminal, port speed limiting attribute configuration method and packet process methodWO2007124660A1 *Mar 28, 2007Nov 8, 2007Huawei Technologies Co., Ltd.Optical network termination, configuration method for limiting rate property of ports therefor, and message handling method* Cited by examinerClassifications U.S. Classification370/231, 370/395.1, 398/168, 370/468International ClassificationH04L12/911, H04L12/801, H04B10/27, H04L12/44, H04B10/272, H04Q11/00Cooperative ClassificationH04Q2011/0086, H04Q11/0062, H04L2012/5635, H04Q11/0067, H04L2012/5651, H04L2012/5605European ClassificationH04Q11/00P4Legal EventsDateCodeEventDescriptionDec 30, 1999ASAssignmentOwner name: FUJITSU LIMITED, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HIJIKATA, TOSHIYUKI;IRIE, TOSHIO;NOBUYASU, KOSUKE;AND OTHERS;REEL/FRAME:010496/0329Effective date: 19991221Mar 23, 2007FPAYFee paymentYear of fee payment: 4May 23, 2011REMIMaintenance fee reminder mailedOct 14, 2011LAPSLapse for failure to pay maintenance feesDec 6, 2011FPExpired due to failure to pay maintenance feeEffective date: 20111014RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services