Connection Setup Delay for Packet Switched Services

The connection establishment procedure for packet switched data services uses a combination of signalling protocols. This paper describes the messages associated with these signalling protocols and identifies the relationship between them. RNC databuild parameters related to connection establishment are identified and discussed. A set of measurements are used to illustrate the dominant phases of connection establishment. The dominant phases are discussed in terms of reducing setup delays while minimising the impact upon other aspects of system design. The paper concludes by suggesting a number of ways in which setup delays can be refined.