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公开(公告)号：DE69800116D1
公开(公告)日：2000-05-25
申请号：DE69800116
申请日：1998-02-24
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MITRA DEBASIS , MORRISON JOHN A
Abstract: Transmission power of a wireless terminal for transmitting a signal representing information of a particular information class to a base station capable of receiving signals for a plurality of information classes is determined based on a probability measure indicating received signal outage durations that would likely occur over a time interval. Moreover, the transmission power is determined to achieve probable signal outage durations according to the measure that are tolerable for the particular information class to be transmitted. The probability measure is further based on an enhanced characterization of a variation and mean of the detected signal interference magnitude over a time interval. Respective differences in the tolerable signal outage intervals for different information classes, such as voice, audio or video or data, and the corresponding enhanced interference characterization enable transmission of signals representing the information classes at desirably respective low power levels while still providing an acceptable quality of service relative to conventional power control techniques. Such low transmission powers tend to contribute less interference to the communication system and enable greater communication capacity.
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公开(公告)号：DE602004001910T2
公开(公告)日：2007-02-15
申请号：DE602004001910
申请日：2004-04-19
Applicant: LUCENT TECHNOLOGIES INC
Inventor： GILES RANDY CLINTON , MITRA DEBASIS , SANIEE IRAJ , WIDJAJA INDRA , ZIRNGIBL MARTIN
Abstract: In a system and method of optical communication, optical signals are generated in multiple wavelength channels. Each optical signal is passively transported from an origination node of a network to a destination node. The destination node is determined by the signal wavelength. For at least some signals, the passive transport includes transport through a branch point of the network, such that the signal wavelenth determines the output branch through which the signal is routed. In certain embodiments, signals are generated according to a schedule devised to substantially prevent the concurrent arrival, at the same destination node, of signals having the same wavelength but coming from different origination nodes.
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公开(公告)号：DE69931841D1
公开(公告)日：2006-07-27
申请号：DE69931841
申请日：1999-04-13
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MITRA DEBASIS , RAMAKRISHNAN KAJAMALAI GOPALAS , MORRISON JOHN A
Abstract: We describe a method for solving the joint problem of optimal routing and optimal bandwidth allocation in a network that supports plural subnetworks and plural communication services. Our method involves, for each source-destination pair communicating via a given subnetwork and a given class of service, determining a traffic rate to be offered to each of a set of permissible routes between that source and that destination, in the given subnetwork and service class. Our method further involves allocating a respective bandwidth to each link of each subnetwork. Significantly, the determinations of traffic rate to be offered, and the allocations of bandwidth to respective links of subnetworks, are performed in a mutually responsive manner.
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公开(公告)号：DE60022151T2
公开(公告)日：2006-07-06
申请号：DE60022151
申请日：2000-11-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BOUILLET ERIC , MITRA DEBASIS , RAMAKRISHNAN KAJAMALAI GOPALAS
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35.发明专利
公开(公告)号：CA2299785C
公开(公告)日：2004-07-06
申请号：CA2299785
申请日：2000-02-28
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ELWALID ANWAR , MITRA DEBASIS
Abstract: This Generalized Processor Sharing (GPS) is the basis for the packet schedul er of choice in IP routers and ATM switches of the future. The currently accepted approach for the design of GPS schedulers is based on deterministic QoS guarantees, which, it is generally accepted, is overly conservative and leads to limitations on capacity. To address this problem we develop a framework for GPS scheduling which is base d on statistical QoS guarantees and statistical multiplexing. We give the design of GPS weights which maximize the coverage of operating points, and also the design of the connection admission control (CAC). The general framework is end-to-end, wit h two heterogeneous QoS classes coexisting with a third, best effort class. Each Q oS class has a specified delay bound together with a bound on the probability of its violation. An important objective is to maximize the bandwidth available to best effort traffic while just satisfying the guarantees of the QoS classes. To this end, we consider outpu t regulated GPS scheduling which has the additional feature of limiting each connection' s share of the bandwidth to a specified value, a design parameter which is determined b y our analysis. The sources are subject to standard dual leaky bucket regulation. For the design of the GPS weights we giveprocedures based on two key concepts, the realizable set and the critical weights. The realizable set is the union of all admissible sets of connections of both classes over all weights. One of the main contributions is a pragmatic design process by which most of the realizable set is realized by only two critical weights. In the benign case, the system is "effectively homogeneous " and a single GPS weight suffices, while in the complementary "effectively non- homogeneous" case it is necessary to switch between the critical weights. The numerical results, which are for a single node with a wide range of traffic and QoS parameters, validate the design procedure and also show that there are substantial capacity gains from statistical multiplexing.
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Patent Agency Ranking36.发明专利
公开(公告)号：CA2314944C
公开(公告)日：2004-03-23
申请号：CA2314944
申请日：2000-08-03
Applicant: LUCENT TECHNOLOGIES INC
Inventor： RAMAKRISHNAN KAJAMALAI GOPALAS , MITRA DEBASIS
Abstract: A method is described for solving traffic engineering problems in a netwo rk In one aspect, the invention is used in a network that has at least one QoS service class and at least one class of service that is not a QoS class. Bandwidth i s allocated to service routes in the QoS service class so as to optimize a figure of mer it such as network revenue. Then a new allocation is made so as to minimize network usa ge without departing too far from the optimal value of the figure of merit. A residual network consists of that bandwidth that remains unallocated, on each link of the network. Bandwidth for non-QoS traffic is allocated to mutes on the residual network. In a second aspect, the invention involves the use of optimization techniques to allocate bandwidth among service routes in one or more service classes in response to a set of demands in each class. The demands are calculated so as to take into account an effective bandwidth associated with the pertinent class, and so as to make allowance for the stochastic behavior of the traffic demands that occur in practice.
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公开(公告)号：DE69806434T2
公开(公告)日：2003-01-23
申请号：DE69806434
申请日：1998-03-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ELWALID ANWAR , MITRA DEBASIS
Abstract: The traffic shaping system according to the principles of the present invention increases the connection-carrying capacity of a network node by shaping the data cells to increase the admissible number of connections. In accordance with certain embodiments of the present invention, the traffic shaping system uses a data buffer at the ingress of the network node to selectively buffer classes of data cells. As such, the traffic shaping system exploits differences in delay tolerances between traffic classes to shape the less delay sensitive traffic classes to reduce the effective bandwidth of a connection of the particular traffic class and thereby increase the nodal connection-carrying capacity. Certain embodiments of the traffic shaping system operate within a framework to provide parameters for the traffic shaping system which increase the connection-carrying capacity for the node while meeting quality of service requirements for the data cells. In accordance with certain embodiments, an integrated regulator and shaper is provided which concurrently regulates and shapes the traffic cells to increase the nodal connection-carrying capacity.
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公开(公告)号：CA2184018C
公开(公告)日：2002-11-26
申请号：CA2184018
申请日：1996-08-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MITRA DEBASIS , MORRISON JOHN A , RAMAKRISHNAN KAJAMALAI GOPALAS
Abstract: A method is described for network optimization based on a multirate, circuit-switched analysis. Network loss probabilities are determined as a so lution of a set of fixed point equations and the sensitivity of network performance, a s a function of offered load and loss probabilities, is determined as a solution to a set of linear equations. Because the numerical complexity of solving both the fixed point equations and the sensitivity equations is of an order which renders an exac t solution computationally intractable, an asymptotic approximation is applied which yi elds a solution to the network loss probabilities and network sensitivities. A glob al optimization procedure is then applied using an iterative, steepest ascent optimization procedure to yield a set of virtual path routings and capacity allocations.
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公开(公告)号：DE69806434D1
公开(公告)日：2002-08-14
申请号：DE69806434
申请日：1998-03-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ELWALID ANWAR , MITRA DEBASIS
Abstract: The traffic shaping system according to the principles of the present invention increases the connection-carrying capacity of a network node by shaping the data cells to increase the admissible number of connections. In accordance with certain embodiments of the present invention, the traffic shaping system uses a data buffer at the ingress of the network node to selectively buffer classes of data cells. As such, the traffic shaping system exploits differences in delay tolerances between traffic classes to shape the less delay sensitive traffic classes to reduce the effective bandwidth of a connection of the particular traffic class and thereby increase the nodal connection-carrying capacity. Certain embodiments of the traffic shaping system operate within a framework to provide parameters for the traffic shaping system which increase the connection-carrying capacity for the node while meeting quality of service requirements for the data cells. In accordance with certain embodiments, an integrated regulator and shaper is provided which concurrently regulates and shapes the traffic cells to increase the nodal connection-carrying capacity.
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40.发明专利
公开(公告)号：CA2314944A1
公开(公告)日：2001-02-09
申请号：CA2314944
申请日：2000-08-03
Applicant: LUCENT TECHNOLOGIES INC
Inventor： RAMAKRISHNAN KAJAMALAI GOPALAS , MITRA DEBASIS
Abstract: A method is described for solving traffic engineering problems in a netwo rk In one aspect, the invention is used in a network that has at least one QoS service class and at least one class of service that is not a QoS class. Bandwidth i s allocated to service routes in the QoS service class so as to optimize a figure of mer it such as network revenue. Then a new allocation is made so as to minimize network usa ge without departing too far from the optimal value of the figure of merit. A residual network consists of that bandwidth that remains unallocated, on each link of the network. Bandwidth for non-QoS traffic is allocated to mutes on the residual network. In a second aspect, the invention involves the use of optimization techniques to allocate bandwidth among service routes in one or more service classes in response to a set of demands in each class. The demands are calculated so as to take into account an effective bandwidth associated with the pertinent class, and so as to make allowance for the stochastic behavior of the traffic demands that occur in practice.
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