Rate matching attribute settings and error rate performance sensitivity for selected UMTS FDD services

The sensitivity of the frequency division duplex (FDD) mode of Universal Mobile Telecommunications System (UMTS) radio access to variation of the rate matching attributes is investigated. The examples of voice service and a more complex service (speech and data) are studied. The speech service is supported using multiple transport channels in order to exploit differing sensitivities to error of classes of coded speech bits. A method of choosing rate matching attributes, is described and applied to these services. It is shown that it is important to choose the rate matching attributes with care for any given service mix, to ensure the required quality of service, and that in general the control of the rate matching attributes is a useful tool in optimizing link (and hence) system performance.