Abstract: A method of estimating bandwidth capacity, available bandwidth and utilization along a path in an IP network is disclosed. ICMP time-stamp requests are sent from a source host on the edge or inside the network to all routers on the end-to-end path to a desired destination. Differences between time-stamp values are used as indicators of QoS service at each router. The collected measurements are then processed at the sending host to infer QoS parameters in terms of path capacity in bit/sec, available bandwidth in bits/sec, individual link utilization and congestion at each router. These parameters can be combined to infer the QoS service in terms of bandwidth on the end-to-end path.

Abstract: A method of estimating bandwidth capacity, available bandwidth and utilization along a path in an IP network is disclosed. ICMP time-stamp requests are sent from a source host on the edge or inside the network to all routers on the end-to-end path to a desired destination. Differences between time-stamp values are used as indicators of QoS service at each router. The collected measurements are then processed at the sending host to infer QoS parameters in terms of path capacity in bit/sec, available bandwidth in bits/sec, individual link utilization and congestion at each router. These parameters can be combined to infer the QoS service in terms of bandwidth on the end-to-end path.

Abstract: A system and method for providing ad hoc controlled user access to wireless and wireline IP communication networks while maintaining privacy for users and traceability for network providers. The method includes an authentication interface accepting user credentials, and a validation entity for credential verification and access authorization. The credentials include a unique identifier and a system generated password. The unique identifier is associated with a personal entity of the user such as a cellular telephone. The password is transmitted to the user through a SMS message to his cellular telephone. The user's Internet session is monitored by the system and all records are indexed by his cellular telephone number. The system and method therefore permit fast and traceable access for guest users at networks where they are were not previously known. Alternatively, users do not provide their unique identifiers such as cellular telephone numbers which are instead already stored in the system.

Abstract: A method of estimating bandwidth capacity, available bandwidth and utilization along a path in an IP network is disclosed. ICMP time-stamp requests are sent from a source host on the edge or inside the network to all routers on the end-to-end path to a desired destination. Differences between time-stamp values are used as indicators of QoS service at each router. The collected measurements are then processed at the sending host to infer QoS parameters in terms of path capacity in bit/sec, available bandwidth in bits/sec, individual link utilization and congestion at each router. These parameters can be combined to infer the QoS service in terms of bandwidth on the end-to-end path.