In the ubiquitous computing environment, it is expected that an intellectual vehicle with a capability of intelligence and communication has access to network and get useful information providing service. This requires a new network architecture and invehicle sensor network technology to support mobility of vehicle service. The mobility of vehicle service is to give users the vehicle services at any time and any where.

In this paper, CDMA-based network architecture is designed for intelligent vehicle services of remote vehicle diagnosis and management. The intelligent vehicle is equipped with a vehicle gateway and invehicle sensor network. The performance of the proposed network structure in terms of the round trip time taken to get a vehicle service is evaluated. The experimental results show that the round trip time is appeared to be different when a vehicle is driven or not and where it is driven. It is 776ms when a vehicle is stopped, 707ms when a vehicle is driven in the rural area, and 910ms in the urban area.