Abstract:
In a packet switched telecommunications networks a dimensioning method, a dimensioning tool and network links dimensioned according to the method and with the help of the tool are provided. The idea behind the embodiments of the invention that, a so called operation point, representing the most representative traffic mix on a link shall be defined to calculate the effective bandwidth of a connection. In accordance with the implementation, the dimensioning method uses an inverted Call Admission Control (CAC) method and Offered Load to calculate effective bandwidths. The effective bandwidths are then used in the Kaufman-Roberts formula for network dimensioning. The inverted CAC method calculates the minimum capacity required to admit a given number of connections from different traffic classes. The operation point of the system is calculated based on the Offered Load and Grade of Service (GoS) requirement. The effective bandwidths are then calculated using the operation point.
Abstract:
A method for determining the capacity that is needed on an lub link to fulfill Grade of Service (GoS) requirements in a Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) for both Dedicated Channel (DCH) traffic and High-Speed Downlink Packet Access (HSDPA) traffic, the method comprising the steps of determining the bandwidth demand of the HSDPA traffic (ElasticDim); calculating an average bandwidth of the DCH traffic on the lub interface (BW
Abstract:
A method for determining the capacity that is needed on an lub link to fulfi ll Grade of Service (GoS) requirements in a Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) for both Dedicated Channel (DCH) traffic and High-Speed Downlink Packet Access (HSDPA) traffic, the method comprising the steps of determining the bandwidth demand of the HSDPA traffic (ElasticDim); calculating an average bandwidth of the DCH traffic on the lub interface (BW use,avg) setting an initial capacity (Capacity) to the capacity need of the DCH traffic (Capacity DCH), wherein a t least the initial capacity will be provided for the DCH traffic in the dimensioned system; and, increasing the value of Capacity until a quality requirement of the HSDPA traffic is fulfilled, the maximum value of Capacity reached being the capacity that is needed for DCH and HSDPA traffic for the lub interface.