A priority based admission control strategy for WCDMA systems

Abstract

Future wireless systems need higher support in terms of QoS support. In particular when several connections with different QoS attributes are allowed a prioritization system has to be foreseen. In the UMTS and other systems that exploit the WCDMA approach the problem of mitigating the Multiple Access Interference arises, too. The Admission Control algorithms have been introduced in the literature in order to prevent any congestion status in the network. In this paper an Admission Control algorithm that works by exploiting the current interference level is presented; moreover each type of traffic is managed in order to respect its QoS in terms of priority.

Performance Evalaution of Uplink CAC for 3G WCDMA Wireless Networks with Multiservices

“…Similar to studies [3][4][5][6][7], only the uplink direction is considered in this study where it is assumed that whenever the uplink channel is assigned the downlink is established. In addition, the study assumes perfect power control operation where a mobile station (MS) and its home base station (BS) use only the minimum needed power in order to achieve the required performance.…”

“…This scheme is explained as follows. The cell load is divided into two non overlapping load partitions, Li (i= 1, 2), such that 2 2 i=lLi < 7max (5) The capacity size or load partition, Li, of each division is selected based on the traffic characteristics and the predefined QoS requirements of each service class [2]. The total current usage load occupied by each connected calls of class i, Oi, is defined as, li, otherwise (6) Where Bi is the number of currently connected class i call.…”

Dynamic radio resource allocation for 3G and beyond mobile wireless networks

“…Several uplink CACs designed for 3G WCDMA have been proposed in the literature [4][5][6][7][8][9][10][11][12][13][14]. These CACs can be classified based on the admission criterion into the following four categories: powerbased CAC, throughput-based CAC, interference-based CAC, and signal-to-interference (SIR) based CAC.…”

“…In [10,11] a CAC algorithm using multiple power-based thresholds for multiple services is proposed. By setting a higher threshold for voice traffic, the voice traffic is given a higher priority compared to data traffic.…”

Radio Resource Management with Dynamic Behavior for 3G and Beyond Wireless Networks with Heterogeneous Traffic

“…In CP, the available channels or resources are partitioned such that for each call classes only a fixed partition of the resource is available while in CS, all resources are open for all classes. Several uplinks CS based CACs designed for 3G WCDMA have been proposed in the literature [3][4][5][6][7][8][9][10]. These CACs can be classified based on the admission criterion into the following four categories: power based CAC, throughput based CAC, interference based CAC, and SIR based CAC.…”