 Method and apparatus for generating a modified P.sub.1 code |
| The above and other objects are achieved in the present invention which is a pulse expander-... |
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| Radar system with reduced distance error |
| The present invention is directed to a radar system of the above mentioned kind in which the ... |
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| Radar altimeter systems |
| It is an object of the present invention to provide a radar altimeter system that can be used, at ... |
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| Signal processing system |
| OF INVENTION The radar system of FIG. 1, which includes the balanced signal processor, can be used ... |
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| Radar channel including an orthogonal MTI filter pair |
| A radar operates in a moving target indication (MTI) mode with frequency diversity by transmitting N... |
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| Operator station for telephone exchange |
| The object of the present invention is to provide an operator station for telephone exchanges, ... |
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| Arrangement for processing a delta modulation signal, in particular for decoding these signals |
| What is claimed is: 1. A processing device for decoding a digital signal formed from binary ... |
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| Sound masking system for open plan office |
| What is claimed is: 1. An acoustic masking system for obtaining conversational privacy in an open ... |
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| Video signal processing apparatus for separating an image of a moving object from video signals |
| OF THE INVENTION Referring now to FIGS. 1 through 3, a preferred embodiment will be explained. A ... |
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| Dynamic image transmission system |
| Accordingly, it is a general object of the present invention to provide a novel and useful dynamic ... |
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Method and apparatus for control in ATM
| Details |
Inventors: Hamada, Takeo; Chujo, Takafumi;
Assignee: Fujitsu Limited (Kanagawa, JP)
Primary Examiner: Olms; Douglas W.
Assistant Examiner: Jung; Min
Attorney, Agent or Firm: Helfgott & Karas, P.C.
The upper and lower bounds of the probability distributions of the number of arrivals at given arrival rates and the upper and lower bounds of the distributions of the arrival rates of each call class are prestored in memory, and by referencing such prestored values, the distributions of the arrival rate and the number of arrivals are obtained (step 104), then, the upper and lower bounds of the resulting cell length distribution are calculated to obtain safe-side evaluation values of QOS parameters (step 106). Based on the obtained QOS parameters, admission or rejection of a call is determined (step 108). Using this method, a function defining the upper bound of the probability distribution of the cell flow rate at the outgoing line side can also be obtained, from which a threshold value is calculated, and abnormality in the cell flow rate is judged on the basis of the threshold value. Furthermore, using a similar method to the above one, it is possible to evaluate the cell length distribution when a UPC is provided on the outgoing line side, and from the result of the evaluation, an optimum declared value to the UPC can be obtained to set up an internetwork connection via the UPC. |
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DETAILED DESCRIPTION We claim: 1.
A call admission control method in an asynchronous transfer mode, comprising the steps of: a) storing first data which include information concerning upper bounds of the probability distributions of the number of arrivals for a plurality of values of arrival rate; b) determining an upper bound of a probability distribution of an arrival rate in a call admitted state which is to be evaluated; c) determining, by using said first data, an upper bound of a probability distribution of a cell length which is given by upper bounds of the probability distributions of the number of arrivals along said determined upper bound of the probability distribution of the arrival rate; d) determining, by using said upper bound of the probability distribution of the cell length, upper limits of parameters representing the quality of service in said call admitted state; e) judging whether to admit or reject a requested call on the basis of said evaluated quality of service; f) rejecting the requested call when the requested call is judged to be rejected in step e; and g) admitting the requested call when the requested call is judged to be admitted in step e.
2.
A method according to claim 1, wherein the upper bound of the probability distribution of the number of arrivals has a normal distribution.
3.
A method according to claim 1, wherein the upper bound of the probability distribution of the number of arrivals has a Poisson distribution.
4.
A method according to claim 1, wherein the upper bound of the probability distribution of the arrival rate has a normal distribution.
5.
A method according to claim 2, wherein said first data is obtained by determining, for each of a plurality of possible call classes, a normal distribution that can provide the upper bound of the distribution of the number of arrivals for every possible case that can occur within a single call class, and by determining convex hulls for all of said determined upper-bound defining normal distributions on a two-dimensional plane defined by the mean and variance of the normal distribution
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Telecommunications 
