This paper addresses the problematic of congestion control in the radio access interface when considering the allocation of voice and data services over several Radio Access Technologies (RATs). In particular, the GSMIEDGE Radio Access Network (GERAN) and the UMTS Terrestrial Radio Access Network (UTRAN) are considered for the evaluation of congestion control strategies. After a congestion situ...

The requirements in terms of service flexibility, spectrum efficiency and speech quality introduce new challenges when voice is transmitted over packet and over wireless. This paper analyses the perceived voice quality when voice frames are transported on packet radio bearers of GSM/EDGE Radio Access Networks (GERAN) and are statistically multiplexed. The resulting quality depends on the link l...

The PS Handover mechanism is being standardized in TSG GERAN [3GPP TS 43.129]. The primary goal of this procedure is to enable real-time services in GERAN A/Gb mode, but the handover mechanism would be applicable also to other PS services. Due to strict Quality of Service requirements on low latency and packet loss, real-time packet-switched (PS) services require a minimal service interruption ...

Abstract. Cellular network traffic is unevenly distributed both in time and space, which greatly complicates network dimensioning. As a result, some cells in the network are permanently congested, while others are underutilized. In a previous paper, the authors showed that this problem can be effectively solved in GSM/EDGE Radio Access Networks (GERAN) by modifying handover boundaries. However,...

GERAN (GSM-EDGE Radio Access Network) operators have traditionally used the Erlang B formula to estimate the number of signalling channels on a per-cell basis. Thus, it is assumed that the network behaves as a loss system with Poisson arrivals. However, the presence of automatic retrial mechanisms and correlated arrivals in these channels suggests that these assumptions might not be valid. This...

*1 Plenary meeting: The highest level of the 3GPP TSG meetings. Currently, there have been four plenary meetings, TSG SA, TSG RAN, TSG CT, and TSG GERAN. *2 Rapporteur: The role of editing specifications, managing work progress and reporting at WG meetings on individual WI and specifications.

The chemical structure of the new unknown glycoside was confirmed as gcran)'t 00-ct-i.-arabinop)'ranosyl-fi-D-g]ucopyranoside (geran)'1 fi-viclanoside) by spectrometric anal)'ses and by an enzymatic hydrolysis-'ithglyeosidasefo)lowedb)'GC-MSandHPLCanslyses. Moreover the vicianoside was hydrel)'zed with acetone powder obtained from fresh tea leaves to ge"erate the same compounds, suggesting this...

In mobile networks, Location Area (LA) planning has a strong influence on network performance. This paper addresses the problem of optimising an existing LA plan in a live GSMEDGE Radio Access Network (GERAN) based on statistical measurements. Unlike prior work, where the quality of an LA plan was assessed based on the number of location update and paging requests, the main focus in this paper ...

Offering multiple services with high spectral efficiency is crucial for 3rd generation cellular systems. Further, for stable system behavior, controlling Quality of Service (QoS) for offered loads beyond the capacity limit of the systems is required. This paper describes and evaluates a simple, easy-to-plan concept that accomplishes this goal for the GSM/EDGE Radio Access Network (GERAN). Corne...