PROCEEDINGS OF THE FOURTH IEEE CONFERENCE ON MOBILE AND WIRELESS COMMUNICATIONS NETWORKS No Need for Signaling: Investigation of Capacity and Quality of Service for Multi–Code CDMA Systems using the WBE++Approach

Next generation mobile communication systems will not be voice dominated anymore. A large set of applications with different quality of service requirements will run on top of the wireless end–system. The quality of service support for different types of services over the wireless link poses formidable challenges to the protocol design. To guarantee a fast return of investment for the network providers, the capacity per wireless cell has to be maximized. In this paper we will introduce a new approach for designing spreading sequences for synchronous CDMA systems, that achieves high capacity and avoids overwhelming signaling. By means of simulation we can show that our approach leads to a significant capacity improvement. Moreover, higher quality of service values can be achieved using a recently introduced protocol.