Patent US5283788A successfully refreshed from Google Patents.
US5283788A
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ISDN D channel congestion control method
Assignee: Fujitsu Ltd
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Filing: 1991-09-10
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Granted: 1994-02-01
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Expires: 2011-09-10
Abstract
Abstract An ISDN D channel congestion control method has at least either a digital subscriber line circuit common (DLCC) or a signaling controller (SGC) notify either an SGC or a packet subscriber system (PSS) of a D channel congestion according to a predetermined protocol, thereby controlling the congestion of a communication controlling apparatus.
Inventors
- 👤 Sumie Morita
- 👤 Takashi Hatano
- 👤 Masako Shinmura
- 👤 Hisashi Koga
- 👤 Tsutomu Shiomitsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:26
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
155 words
An ISDN D channel congestion control method for of an ISDN digital switching apparatus for controlling traffic congestion between terminals and the digital subscriber line circuit common, comprising: a step storing D channel packet information concentrated by a signaling controller in a first buffer; a step of transferring the D channel packet information stored in the first buffer to at least one of second buffers each corresponding to respective terminals in dependence upon distribution data; a step of detecting whether the used capacities of the second buffers exceed a threshold, when the terminals receive the D channel packet information through the corresponding one of the second buffers connected to the terminals; a step of discarding the D channel packet information for those of the second buffers whose used capacities exceed the threshold; and a step of notifying a packet linked controller access of said discarding through a simplified linked layer access procedure D channel protocol.
Claim 2
Dependent Claim
155 words
An ISDN D channel congestion control method for of an ISDN digital switching apparatus for controlling traffic congestion between terminals and the digital subscriber line circuit common, comprising: a step storing D channel packet information concentrated by a signaling controller in a first buffer; a step of transferring the D channel packet information stored in the first buffer to at least one of second buffers each corresponding to respective terminals in dependence upon distribution data; a step of detecting whether the used capacities of the second buffers exceed a threshold, when the terminals receive the D channel packet information through the corresponding one of the second buffers connected to the terminals; a step of discarding the D channel packet information for those of the second buffers whose used capacities exceed the threshold; and a step of notifying a packet linked controller access of said discarding through a simplified linked layer access procedure D channel protocol.
Claim 3
Dependent Claim
107 words
An ISDN D channel congestion control method for the digital subscriber line circuit common of an ISDN digital switching apparatus, comprising: a step of storing D channel signaling information concentrated by a signaling controller in a first buffer; a step of transferring the D channel signaling information stored in the first buffer to at least one of second buffers each corresponding to respective terminals in dependence upon distribution data; a step of detecting the signaling information for respective terminals in excess of a predetermined information volume and resetting the link, when the terminals receive the D channel signaling information through the corresponding one of the second buffers.
Claim 4
Dependent Claim
107 words
An ISDN D channel congestion control method for the digital subscriber line circuit common of an ISDN digital switching apparatus, comprising: a step of storing D channel signaling information concentrated by a signaling controller in a first buffer; a step of transferring the D channel signaling information stored in the first buffer to at least one of second buffers each corresponding to respective terminals in dependence upon distribution data; a step of detecting the signaling information for respective terminals in excess of a predetermined information volume and resetting the link, when the terminals receive the D channel signaling information through the corresponding one of the second buffers.
Claim 5
Dependent Claim
102 words
An ISDN D channel congestion control method for the digital subscriber line circuit common of an ISDN digital switching apparatus, comprising: a step of performing a congestion control according to the usage rate of a receiving buffer, when the receiving buffer stores D channel packet information concentrated by a signaling controller; a step of notifying a packet linked controller access in a packet subscriber system of a congestion by a simplified linked layer access procedure D channel protocol; and a step of regulating the D channel packet information by a linked layer access procedure D channel in the packet linked controller access.
Claim 6
Dependent Claim
102 words
An ISDN D channel congestion control method for the digital subscriber line circuit common of an ISDN digital switching apparatus, comprising: a step of performing a congestion control according to the usage rate of a receiving buffer, when the receiving buffer stores D channel packet information concentrated by a signaling controller; a step of notifying a packet linked controller access in a packet subscriber system of a congestion by a simplified linked layer access procedure D channel protocol; and a step of regulating the D channel packet information by a linked layer access procedure D channel in the packet linked controller access.
Claim 7
Dependent Claim
123 words
An ISDN D channel congestion control method for a signaling controller of an ISDN digital switching apparatus, comprising: a step of monitoring the usage rate of a receiving buffer for receiving P (packet) information supplied from a digital subscriber line circuit common; a step of setting sixteen to (16) the service access point of a packet subscriber system when the usage rate is equal to or greater than a first usage rate threshold; a step of outputting a receive not ready signal to a terminal according to a linked layer access procedure D channel (LAPD); and a step of discarding the P (packet) information when the usage rate of the receiving buffer is equal to or greater than a second usage rate threshold.
Claim 8
Dependent Claim
123 words
An ISDN D channel congestion control method for a signaling controller of an ISDN digital switching apparatus, comprising: a step of monitoring the usage rate of a receiving buffer for receiving P (packet) information supplied from a digital subscriber line circuit common; a step of setting sixteen to (16) the service access point of a packet subscriber system when the usage rate is equal to or greater than a first usage rate threshold; a step of outputting a receive not ready signal to a terminal according to a linked layer access procedure D channel (LAPD); and a step of discarding the P (packet) information when the usage rate of the receiving buffer is equal to or greater than a second usage rate threshold.
Claim 9
Dependent Claim
132 words
An ISDN D channel congestion control method for the signaling controller of an ISDN digital switching apparatus having a digital subscriber line circuit common, comprising: a step of monitoring the usage rate of a sending buffer storing P (packet) information to be transmitted to the digital subscriber line circuit common; a step of performing a primary congestion notification when the usage rate of the sending buffer reaches a first usage rate threshold; a step of regulating the transmission of the I frame having a the digital subscriber line circuit common shelf number corresponding to a packet linked controller access in a packet subscriber system; and a step of performing a secondary congestion notification for discarding the packet information, when the usage rate of the sending buffer exceeds a second usage rate threshold.
Claim 10
Dependent Claim
132 words
An ISDN D channel congestion control method for the signaling controller of an ISDN digital switching apparatus having a digital subscriber line circuit common, comprising: a step of monitoring the usage rate of a sending buffer storing P (packet) information to be transmitted to the digital subscriber line circuit common; a step of performing a primary congestion notification when the usage rate of the sending buffer reaches a first usage rate threshold; a step of regulating the transmission of the I frame having a the digital subscriber line circuit common shelf number corresponding to a packet linked controller access in a packet subscriber system; and a step of performing a secondary congestion notification for discarding the packet information, when the usage rate of the sending buffer exceeds a second usage rate threshold.
Claim 11
Dependent Claim
110 words
An ISDN D channel congestion control method for the signaling controller of an ISDN digital switching apparatus having a digital subscriber line circuit common, comprising: a step of monitoring the usage rate of a buffer storing signaling information to be transmitted to the digital subscriber line circuit common; a step of regulating transmission from a line processor through a primary congestion notification, when the usage rate of the buffer is detected to be not less than a first usage rate threshold; and a step of compulsorily releasing the line processor through a secondary congestion notification, when the usage rate is detected to be greater than a second usage rate threshold.
Claim 12
Dependent Claim
110 words
An ISDN D channel congestion control method for the signaling controller of an ISDN digital switching apparatus having a digital subscriber line circuit common, comprising: a step of monitoring the usage rate of a buffer storing signaling information to be transmitted to the digital subscriber line circuit common; a step of regulating transmission from a line processor through a primary congestion notification, when the usage rate of the buffer is detected to be not less than a first usage rate threshold; and a step of compulsorily releasing the line processor through a secondary congestion notification, when the usage rate is detected to be greater than a second usage rate threshold.
Claim 13
Dependent Claim
117 words
An ISDN D channel congestion control method for a signaling controller of an ISDN digital switching apparatus, comprising: a step of monitoring the usage rates of respective receiving buffers for concentrating D channel lines; a step of regulating the transmission of I frames from the corresponding line of a packet linked controller access in a packet subscriber system through a primary congestion notification, when one of the usage rates reaches a first usage rate threshold; and a step of having the signaling controller discard the information to be stored in one of the receiving buffers through a secondary congestion notification, when the usage rate of the one of the receiving buffers reaches a second usage rate threshold.
Claim 14
Dependent Claim
117 words
An ISDN D channel congestion control method for a signaling controller of an ISDN digital switching apparatus, comprising: a step of monitoring the usage rates of respective receiving buffers for concentrating D channel lines; a step of regulating the transmission of I frames from the corresponding line of a packet linked controller access in a packet subscriber system through a primary congestion notification, when one of the usage rates reaches a first usage rate threshold; and a step of having the signaling controller discard the information to be stored in one of the receiving buffers through a secondary congestion notification, when the usage rate of the one of the receiving buffers reaches a second usage rate threshold.
Claim 15
Dependent Claim
117 words
An ISDN D channel congestion control method for a signaling controller of an ISDN digital switching apparatus, comprising: a step of monitoring the usage rates of respective sending buffers for concentrating respective D channel lines; a step of notifying a usage rate in excess of a first usage rate threshold to a packet link controller access in a packet subscriber system, thereby outputting a receive not ready signal by the linked layer access procedure D channels of all shelves concentrating the D channel lines; a step of notifying a line processor of a usage rate in excess of a second usage rate threshold; and a step of having the signaling controller discard the excess D channel information.
Claim 16
Dependent Claim
117 words
An ISDN D channel congestion control method for a signaling controller of an ISDN digital switching apparatus, comprising: a step of monitoring the usage rates of respective sending buffers for concentrating respective D channel lines; a step of notifying a usage rate in excess of a first usage rate threshold to a packet link controller access in a packet subscriber system, thereby outputting a receive not ready signal by the linked layer access procedure D channels of all shelves concentrating the D channel lines; a step of notifying a line processor of a usage rate in excess of a second usage rate threshold; and a step of having the signaling controller discard the excess D channel information.
Claim 17
Dependent Claim
99 words
An ISDN D channel congestion control method for a signaling controller of an ISDN digital switching apparatus, comprising: a step of monitoring the usage rates of sending buffers for respective lines in a linked layer access procedure D channel of the signaling controller; a step of outputting a primary congestion notification, and regulating calls destined for a line processor, when any one of the usage rates exceeds a first usage rate threshold; and a step of outputting a secondary congestion notification, and compulsorily releasing the sending buffers, when one of the usage rates exceeds a second usage rate threshold.
Claim 18
Dependent Claim
99 words
An ISDN D channel congestion control method for a signaling controller of an ISDN digital switching apparatus, comprising: a step of monitoring the usage rates of sending buffers for respective lines in a linked layer access procedure D channel of the signaling controller; a step of outputting a primary congestion notification, and regulating calls destined for a line processor, when any one of the usage rates exceeds a first usage rate threshold; and a step of outputting a secondary congestion notification, and compulsorily releasing the sending buffers, when one of the usage rates exceeds a second usage rate threshold.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-01-31 | 1997-08-02 | 1998-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-31 | 2001-08-02 | 2002-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-31 | 2005-08-02 | 2006-02-01 | $7700.00 | Window Closed / Lapsed |