Paper Info
Title
Realization and Performance Evaluation of IMS Multimedia Telephony for HSPA
Abstract
The proposed Voice over IP (VoIP) over HSPA solution targets high capacity as well as coverage and speech quality compa- rable to circuit switched (CS) speech. The VoIP over HSPA radio bearer realization includes one radio link control (RLC) un-acknowledged mode for the speech media. Parallel signal- ing radio bearers are also transmitted using HSPA access. Due to the flexibility of IP and HSPA, both narrow-band and wide- band speech codecs work well. A delay sensitive scheduler is selected for the downlink transmission. For the uplink, the non-scheduled mode is selected. Coverage and quality can, with simulations, be shown to be at least as good as CS speech according to 3GPP Rel. 99 spec- ifications. Similarly, capacity evaluations show that VoIP over HSPA has the potential of matching or exceeding CS speech capacity, depending on scenario. Finally, end to end simula- tions show that the maximum allowed delay of single links sel- dom occurs for uplink and downlink simultaneously, resulting in a lower perceived end-to-end delay than expected most of the time. I. INTRODUCTION The introduction of an all-IP cellular network (1) enables a seamless cellular user experience. In the all-IP cellular net- work users will be provided with an application flexibility su- perior to that of the circuit switched infrastructure offered in the first 3G networks (2). These applications are often referred to as MultiMedia Telephony (MMTel) and belong to a set of services, including speech, real-time video, and image sharing. To facilitate the introduction of new services the mobile indus- try introduced the IP Multimedia Subsystem (IMS), a service layer that allows operators to efficiently deploy and manage the above-mentioned IMS services The advent of a reliable, efficient and flexible VoIP service is one important prerequisite for the transition from today's net- works into a single all-IP network. The convergence into one all-IP network can lead to lower overall operational cost for the operator.
Year
DOI
Venue
2006
10.1109/PIMRC.2006.254112
PIMRC
Keywords
Field
DocType
cellular network,end to end delay,real time,circuit switched,internet telephony,ip multimedia subsystem,voip,voice over ip,user experience
End-to-end delay,Circuit switching,Wideband audio,Computer science,Computer network,Real-time computing,IP Multimedia Subsystem,Multimedia telephony,Radio Link Control,Voice over IP,Telecommunications link
Conference
Citations 
PageRank 
References 
3
0.78
2
Authors
5
Name
Order
Citations
PageRank
Stefan Wänstedt115515.21
Mårten Ericson2327.57
Kristofer Sandlund3172.87
Mats Nordberg461.85
Tomas Frankkila531.11