nsported along a connection in the ATM network. The PCR is the determining factor in how often cells are sent in relation to time in an effort to minimize jitter. PCR is generally coupled with the CDVT (Cell Delay Variation Tolerance), which indicates how much jitter is allowable. Sustained Cell Rate (SCR): A calculation of the average allowable, long-term cell transfer rate on a specific connection. Maximum Burst Size (MBS): The maximum allowed burst size of cells that can be transmitted contiguously on a particular connection. Minimum Cell Rate (MCR): The minimum allowed rate at which cells can be transported along an ATM connection. ATM defines a number of QoS parameters to measure the QoS of a connection and quantify end-to-end network performance at the ATM layer. These parameters are negotiated when a connection is set up. The network should guarantee the negotiated QoS by meeting certain values of these parameters. Cell Transfer Delay (CTD). The delay experienced by a cell between the time it is transmitted by the source and is received by the destination. Cell Delay Variation (CDV). The variation between the maximum and minimum CTD experienced during the connection. Cell Loss Ratio (CLR). The percentage of cells that are lost in the network due to error or congestion and are not received by the destination. When an ATM connection is set up, it needs to specify an appropriate service category, agree a traffic contract with the ATM network and negotiate the QoS parameters that the network shall guarantee. A.5 Random Early Detection and Weighted RED A.4 Ethernet Ethernet is a popular transport technology in the IP network. It is a frame-based computer networking technology which could operate at many speeds for Local (LANs). A well-known technology CSMA/CD (Carrier Sense Multiple Access with Collision Detection) is used in Ethernet to govern the way the computer shared the channels. In this thesis, Ethernet is used for the transport in an IP-based UTRAN due to its low cost, flexibility and scalability. Ether