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1.发明专利
公开(公告)号：JPH10290196A
公开(公告)日：1998-10-27
申请号：JP5461198
申请日：1998-03-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MITRA DEBASIS , MORRISON JOHN A
Abstract: PROBLEM TO BE SOLVED: To exchange signals expressing plural information classes without illegally limiting communication link capacity in a radio network by setting the transmission power of the radio terminal so that the probability of the signal defect period during a certain time period can have a value allowable to the specified information class to which the signal belongs. SOLUTION: An a method for determining the transmission power of a radio terminal 20, for example, the strength of the interference signal during a certain time period is detected by a base station 5, and the average value, variant value and standard deviation of this strength are determined. According to the measurement of allowance signal defect period probability, desired signal strength Pi of the signal containing the information of class (i) to be received by the base station 5 is determined based on the determined average value, the variant value and the standard deviation of the interference signal. Then, the base station 5 prepares a control signal containing the information expressing the determined signal strength Pi and transmits this signal to the terminal 20 within its coverage area 25.
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公开(公告)号：JPH09181743A
公开(公告)日：1997-07-11
申请号：JP29428196
申请日：1996-11-07
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MITRA DEBASIS , MORRISON JOHN A , RAMAKRISHNAN KAJAMALAI GOPALAS
Abstract: PROBLEM TO BE SOLVED: To provide a method for designing and optimizing a multirate ATM network by integrally using a nonasymptatic analysis method and a asymptotic analysis method. SOLUTION: One price of routing for a virtual path inside a network 110 between communication device 105-1 and 105-2 is provided with nodes from 130-1 to 130-3 and links 140-1, 140-3, 140-5 and 140-7. Then, the blocking probability of the subset for the link of this set is determined, the sensitivity of network performance is determined as a function of load requested for that network, and that network performance is adjusted based on the sensitivity and the blocking probability. In this case, the asymptotic approximation is applied to both the network loss probability and the network sensitivity for applying their solutions. Next, a global optimizing is applied by using the repetitive steepest ascent procedure, and the virtual path routing and capacitance allocation of set are provided. Thus, when handing the link of wide band width, the complexity of calculation can be canceled.
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3.发明专利
公开(公告)号：JPH11341154A
公开(公告)日：1999-12-10
申请号：JP11600099
申请日：1999-04-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MITRA DEBASIS , MORRISON JOHN A , RAMAKRISHNAN KAJAMALAI GOPALAS
Abstract: PROBLEM TO BE SOLVED: To solve the complex problem of optimal route selection and optimal band width allocation in plural sub-networks and a network supporting plural communication services by making decision of a traffic speed to be provided and allocating the band width to each link of the sub-network by a method which responds to each other. SOLUTION: This method is executed by interaction between a master process 110 and a slave process which exist for each VPN 15. The master process 110 solves a resources allocation problem when a pair of service route traffic density is equivalent to an optimal path selection corresponding to a sub-network link capacity. Each of the slave processes solves an optimal path selection problem in the case of a present pair of the link capacity with regard to each sub-network. All the procedures are repeatedly performed in the way in which each reallocation of the link is performed and then a new solution for the optimal path selection problem regarding each sub-network is found.
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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：CA2184018A1
公开(公告)日：1997-05-08
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 soluti on of a set of fixed point equations and the sensitivity of network performance, as 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 poi nt equations and the sensitivity equations is of an order which renders an exact so lution computationally intractable, an asymptotic approximation is applied which yields a solution to the network loss probabilities and network sensitivities. A global 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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Patent Agency Ranking
公开(公告)号：CA2266157A1
公开(公告)日：1999-10-24
申请号：CA2266157
申请日：1999-03-18
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MITRA DEBASIS , MORRISON JOHN A , RAMAKRISHNAN KAJAMALAI GOPALAS
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：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：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：DE69800116T2
公开(公告)日：2000-12-21
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：DE69931841T2
公开(公告)日：2006-11-30
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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