Flow Level Performance Comparison of Packet Scheduling Schemes for UMTS EUL

Abstract

Abstract. The Enhanced Uplink (EUL) is expected to provide higher capacity, increased data rates and smaller latency on the communication link from users towards the network. A key mechanism in the EUL traffic handling is the packet scheduler. In this paper we present a performance comparison of three distinct EUL scheduling schemes (one-by-one, partial parallel and full parallel) taking into account both the packet level characteristics and the flow level dynamics due to the random user behavior. For that purpose, we develop a hybrid analytical/simulation approach allowing for fast evaluation of performance measures such as mean file transfer time and fairness expressing how the performance depends on the user's location.

Performance Analysis of Uplink Packet Schedulers in Cellular Networks with Relaying

“…The particular form of the Markov chain is scheduler specific via R(n). A more detailed description of a related CTMC can be found in [4]. All schemes but ExOBO are a multi-class M/G/1 processor sharing (PS) model whose steady state distribution is readily available, e.g.…”

“…In recent years many studies concentrated on EUL performance evaluation of various scheduling schemes for EUL, [7,4] to mention some. In principle, independently of the scheme, remote MSs suffer from high path loss and thus low data rates.…”

Performance of relay-enabled uplink in cellular networks - a flow level analysis

“…Increased effective rates for remote users translate into shorter service time and decreased system load, which influence positively all MSs, see Equation (5). The poor performance of the OBO scheme is the result of inefficient resource utilization and thus long service time.…”

“…As several studies show, see [5], [8], [12], users at the edge of the cell generally suffer from strong signal degradation and thus low data rates. We see relaying as a promising approach to upgrade performance.…”

“…Depending on location, a MS's transmit capacity may be insufficient to utilize the available base station resource, in which case several scheduling strategies become an attractive choice. Some studies, for example [5], [9], [12], dedicated to scheduling in the EUL, show the relevance of the scheduler for performance.…”