Synergy between admission control and link adaptation in integrated voice/data cellular networks

The capacity maximization of integrated voice/data wireless cellular communication systems with link adaptation (LA) is addressed using the GSM/GPRS system as a case study. Only coding schemes CS-1 and CS-2 are used. Two different quality zones differentiated by signal quality are used and mapped to the two coding schemes. Data users in the good quality zone make use of CS-2 only; data users in the bad quality zone make use of CS-1 only. Also, we provide an overview of reported system performance analyses of integrated voice/data cellular systems. Finally, a resource allocation strategy, called triple link quality-aware fractional channel reservation (TLQAFCR), is proposed; it differentiates data users in the different quality coverage zones. Numerical results show that TLQAFCR effectively increases system capacity relative to strategies without user location differentiation. This is because, in TLQAFCR, preference is given to data users in the good quality (CS-2) zone which, on average, retain resources less time than data users in the bad quality (CS-1) zone. Numerical results also show that the use of the LA technique increases approximately 20% data system capacity and that the synergy between admission control and link adaptation yields more than 387% capacity gain.