An emulator framework for a new radio resource management for QoS guaranteed services in W-CDMA systems

Abstract

In the context of third-generation (3G) systems a mix of services with different requirements are expected. Consequently, packet scheduling mechanisms for quality of service (QoS) guarantees will play a key role. This paper proposes a new scheduling strategy that makes consistent the target quality in the radio link with the priority level assigned to each user. The performance of such a strategy is assessed by system level simulations and, in order to gain more insight into the difficulties of this optimization problem, it is compared to other alternatives. This work is part of the Wineglass project, within the Fifth Framework Program of the European Commission (IST), where a real time demonstrator including the radio resource management tasks is being developed. Thus, an implementation approach of the proposed scheduling is also described. The implementation is based on lookup tables and this approach is validated by simulation.

Filtering strategies for TFC selection schemes in 3GPP W-CDMA systems

“…A packet scheduling strategy for the quality of service guarantee is developed in [11]. It checks the target quality consistently in the radio link with the priority level assigned to each user.…”

“…2 dt, and E b /N o is the energy per bit to the noise density ratio [11]. It can be obtained by the following equation:…”

Optimal discrete spreading factor determination for uplink resource allocation in multiservice UMTS and HSUPA networks

“…Unfortunately, similar to  [6] and  [14], this algorithm is based on a power allocation policy that leads to non-integer SF for terminals. Standardized SF have already been considered in  [15] where an UMTS emulator was developed; nevertheless, the radio resources allocation policy aimed at guaranteeing the required QoS of offered services and therefore not at maximizing the aggregate NRT throughput. Discrete throughputs are also considered in  [16], where it is proposed to compute in a table the aggregate uplink throughput for each achievable individual throughput, and then to deduce the maximal one.…”

A Scheduler for Multi-Traffic Services in WCDMA Networks

“…In [4], Ofuji shows the performance of three schedulers on the Web traffic model in HSDPA system. In [5], Sallent proposes a new scheduling strategy according to priority levels on the Web traffic model in release 99 system that the scheduler operates at radio network controller (RNC). However, demands of service for real time traffic (conversational or streaming traffic) as well as for non-real time traffic (ftp or web traffic) increase over wireless networks.…”