The ubiquity and convergence of mobile telephony and the Internet leads many to believe that future isochronous telephony data will be transported in the form of Voice-over-IP (VoIP) datagrams. This paper investigates the modelling and aggregation of multiple VoIP streams. The relationship between the number of VoIP sources, output link rate and certain teletraffic metrics is investigated. Thereafter, an exemplar network consisting of a small cluster of wireless cells is considered and a number of different handover strategies enacted. The frequency and duration of handovers are varied to investigate the effects on system performance when VoIP calls are ongoing. The findings in this paper could be extremely useful when dimensioning networks as they provide insight into the QoS obtainable for the individual streams. This is a critical issue for real-time applications such as VoIP.

Abstrucf-The proposed uses of the resource reservation protocol (RSVP) now extend beyond reserving resources in Internet Protocol (1P) networks to being a generic signaling protocol for generalised multi-protocol label switching (GMPLS). In any implementation of RSVP, there are a number of discretionary timing parameters, the values of which aff'ect the efficacy of RSVP in estahlishing and maintaining reservationdconnections. This work frames the interactions between key RSVP timing parameters and performance metrics as a multi-objective optimisation problem which, due to its intractable nature, is tackled using a reputable multi-objective evolutionary algorithm. It is shown that this approach is a feasible means of exploring many of the innate tradeoffs in soft-state protocols such BS RSVP. This approach facilitates an extensive comparison of a number of variants

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An Analysis of Scaling Issues in MPLS-TE Core Networks Status of This Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited.

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