Dynamic resource allocation in integrated voice/data wireless networks with link adaptation

Abstract

In this paper, the performance of dynamic resource allocation and channel de-allocation in integrated voice/data wireless networks with link adaptation is mathematically analyzed and evaluated. To our knowledge, all previous related works published in the literature have considered only link adaptation (LA) or dynamic resource allocation (DRA) separately. Additionally, a DRA strategy with link quality-aware prioritized channel de-allocation (called DRA LA DAS) is proposed. With the DRA LA DAS scheme that calls with the greatest number of channels and the worst link quality are degraded first. In this way, in DRA LA DAS preference is given to data users with good quality link which, on average, retain resources less time than data users with bad quality link. Numerical results show that the proposed DRA LA DAS strategy significantly improves system performance. The GSM/GPRS system is used as a case study. The GSM voice new call blocking and forced termination probabilities, GPRS packet dropping probability, average GPRS packet transmission time, and channel utilization are analyzed.

Teletraffic Analysis for the Performance Evaluation of De-Allocation/Re-Allocation Strategies in GSM/GPRS Cellular Networks

“…This behavior can be observed from Figure 3, where the average number of resources allocated to GPRS packet calls with bad quality links plotted versus GPRS data packet arrival rate is showed. Note that the re-allocation scheme process gives a higher average number of resources allocated to GPRS packet calls with CS-1 when the packet arrival rate is 9 Numerical results of the performance evaluation for DRA, DRA LA, DRA DAS and DRA LA DAS strategies were taken from [3]. 10 Which come from a GSM/GPRS call termination or a GSM call transfer to a new cell.…”

“…Data users with good quality link make use of CS-2; and data users with bad quality link make use of CS-1. A parameter, p [2][3][4][5][6][7], is used to represent the proportion of data users with good quality link using CS-2. The calculation of p considering shadowing is addressed in [7].…”

“…It was not but until recently that teletraffic analysis considered LA [2][3][4][5][6][7]. In fact, only [2][3][4][5] have analyzed an integrated voice/data cellular network (i.e. GSM/GPRS); and, all of them but [3], considered single-slot transmission only.…”

“…However, none of the works in [11][12][13][14][15][16][17][18][19] on flexible resource allocation considered LA. To the authors' knowledge, few studies exist ( [2][3][4][5]) that have evaluated the performance of integrated voice/data cellular networks at the system level when LA is used 3 . In this paper, the performance of DRA and FRA (de-allocation and re-allocation) in integrated voice/data wireless networks in conjunction with LA used on data service is studied and mathematically analyzed.…”

“…In fact, only [2][3][4][5] have analyzed an integrated voice/data cellular network (i.e. GSM/GPRS); and, all of them but [3], considered single-slot transmission only. GPRS networks use multi-slot allocation (i.e.…”