US6324166B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Call setup control apparatus in ATM switch
Assignee: KDDI Corp
•
Filing: 1998-07-02
•
Granted: 2001-11-27
•
Expires: 2018-07-02
Abstract
Abstract A call setup control apparatus has a first calculation unit for calculating an objective value of cell loss ratio PB(u) of a buffer Bu in priority class u which is equal to or lower than a priority class k (u=k to K), based upon parameters of an average cell rate R(k,j), an objective value of cell loss ratio Q(k,j), and the number of calls N(k,j) for calls of each type j (J=1 to Jk) in each class k (=1 to K), with considering a cell rate of calls in priority class which is higher than the class k (class 1 to k-1), when a fresh call is arrived, a unit for obtaining a bandwidth alpha(k,u,j) required for calls of type j in class k in the buffer Bu to make a cell loss ratio in the buffer Bu to be equal to or less than the objective value PB(u), a second calculation unit for calculating a required bandwidth C(u) for the buffer Bu, based upon the obtained bandwidth alpha(k,u,j), and a unit for judging whether the fresh call is acceptable or not by comparing the calculated bandwidth C(u) with a link capacity Cp.
Inventors
- 👤 Hiroyuki Yokoyama
- 👤 Hajime Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:18
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04Q11/0478; H04L; H04L12/00; H04L12/54; H04L12/56; H04L12/5601; H04L2012/5629; H04L2012/5631; H04L2012/5632; H04L2012/5638; H04L2012/5646; H04L2012/5647; H04L2012/5651
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
239 words
A call setup control apparatus, equipped In an ATM switch with a plurality of buffers for respective priority classes of calls, for providing priority control of calls of a plurality of types with different quality of service requirements, said apparatus comprising: a first calculation means for calculating an objective value of cell loss ratio P B (u) of a buffer B u in priority class u which is equal to or lower than a priority class k (u=k to K), based upon parameters of an average cell rate R(k,j), an objective value of cell loss ratio Q(k,j), and the number of calls N(k,j) for calls of each type j (j=1 to J k ) in each class k (=1 to K), with considering a cell rate of calls in priority class which is higher than the class k (class 1 to k−1), when a fresh call is arrived; means for obtaining a bandwidth α(k,u,j) required for calls of type j in class k in the buffer B u to make a cell loss ratio in the buffer B u to be equal to or less than the objective value P B (u); a second calculation means for calculating a required bandwidth C(u) for the buffer B u , based upon the obtained bandwidth α(k,u,j); and means for judging whether the fresh call is acceptable or not by comparing the calculated bandwidth C(u) with a link capacity C P .
Claim 2
Dependent Claim
239 words
A call setup control apparatus, equipped In an ATM switch with a plurality of buffers for respective priority classes of calls, for providing priority control of calls of a plurality of types with different quality of service requirements, said apparatus comprising: a first calculation means for calculating an objective value of cell loss ratio P B (u) of a buffer B u in priority class u which is equal to or lower than a priority class k (u=k to K), based upon parameters of an average cell rate R(k,j), an objective value of cell loss ratio Q(k,j), and the number of calls N(k,j) for calls of each type j (j=1 to J k ) in each class k (=1 to K), with considering a cell rate of calls in priority class which is higher than the class k (class 1 to k−1), when a fresh call is arrived; means for obtaining a bandwidth α(k,u,j) required for calls of type j in class k in the buffer B u to make a cell loss ratio in the buffer B u to be equal to or less than the objective value P B (u); a second calculation means for calculating a required bandwidth C(u) for the buffer B u , based upon the obtained bandwidth α(k,u,j); and means for judging whether the fresh call is acceptable or not by comparing the calculated bandwidth C(u) with a link capacity C P .
Claim 3
Dependent Claim
154 words
The apparatus as claimed in claim 1 , wherein said first calculation means includes a third calculation means for calculating a summation S(k) of the average cell rates R(k,j) of all types 1 to J k (j=1 to J k ) in class k (k=1 to K), based upon the parameters of the average cell rates R(k,j) and the number of calls N(k,j), and a determination means for determining an objective value of cell loss ratio P Q (k) for calls in the class k to one with the minimum value among the objective value of cell loss ratio Q(k,j) of the type j in the class k, and wherein the objective value of cell loss ratio P B (u) of class k buffer is calculated in accordance with the summation S(k) of the average cell rates and the objective value of cell loss ratio P Q (k) for calls in the class k.
Claim 4
Dependent Claim
52 words
The apparatus as claimed in claim 2 , wherein the summation S(k) of the average cell rates is calculated from S ( k ) = ∑ j = 1 J k N ( k , j ) R ( k , j ) . Equation (2)
Claim 5
Dependent Claim
48 words
The apparatus as claimed in claim 2 , wherein the objective value P Q (k) of cell loss ratio in the class k is calculated from P Q ( k ) = min j { Q ( k , j ) } . Equation (1)
Claim 6
Dependent Claim
67 words
The apparatus as claimed in claim 2 , wherein the objective value of cell loss ratio P B (u) is calculated from P B ( u ) = S ( u ) ∑ i = 1 u S ( i ) P Q ( u ) [ u = k , … , K ] . Equation (3)
Claim 7
Dependent Claim
62 words
The apparatus as claimed in claim 1 , wherein the required bandwidth C(u) for the buffer B u is calculated from C ( u ) = ∑ i = 1 u ∑ j = 1 J i N ( i , j ) α ( i , u , j ) . Equation (4)
Claim 8
Dependent Claim
119 words
The apparatus as claimed in claim 1 , wherein said apparatus further comprises control parameter tables for storing the average cell rate R(k,j), the objective value of cell loss ratio Q(k,j), and the number of calls N(k,j) for calls of each type j in each class k, the objective value P Q (k) of cell loss ratio in the class k, the summation S(k) of the average cell rates R(k,j) in all classes, the objective value of cell loss ratio P B (u) of the buffer B u , the bandwidth α (k,u,j) required for calls of type j in class k in the buffer B u , and the required bandwidth C(u) for the buffer B u .
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) | 2004-11-26 | 2005-05-28 | 2005-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-11-26 | 2009-05-28 | 2009-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-11-26 | 2013-05-28 | 2013-11-27 | $7700.00 | Window Closed / Lapsed |