QoS Simulation of IP based GSM and EDGE Radio Access Network
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Due to increased popularity and acceptance of mobile communication the data services (i.e., General Packet Radio Services) has become standardized and is now implemented and ready for usage. General Packet Radio Service (GPRS) enables a mobile user to use up to eight time slots in a channel to increase their bitrate during data transmission. Enhanced Data rates for GSM Evolution (EDGE) will increase the bitrate during data transmission even more due to a newer modulation techniques which can be used in a given time slot.
Both voice calls and data traffic generates signalling to setup and release the sessions for voice calls and data traffic. In an IP based GSM and EDGE Radio Access Network (IP based GERAN) there will be problems to ensure low delay of packets between nodes for voice traffic and signalling traffic. There are different ways to cope with this problem mainly using different scheduling algorithms, like Weighted Fair Queuing (WFQ) and Class Based Queuing (CBQ).
IP based GERAN using Class Based Queuing was studied using simulation. The first case study different bandwidths for voice traffic and control signalling were examined. In the second case study the voice traffic has higher priority than signalling traffic and in the third case study the voice traffic and control signalling have the same priority. The result is that in the first case the control signalling is affected, but not delayed due to the amount of voice traffic. In the second case the control signalling is affected when voice traffic used more than 60% of the bandwidth and in the third case the control signalling is not affected at all.
If some of the new protocols (e.g., SIP) are used to carry a voice over IP session from a mobile terminal to a terminal in the Internet it would be desirable to be able to ensure Quality of Service end to end. The ICEBERG project at University of California at Berkeley was examined as an example of a system which is utilizing LAN technology to provide the infrastructure network.
Place, publisher, year, edition, pages
2001. , 43 p.
Quality of Service, GERAN, GPRS; EDGE, GSM
IdentifiersURN: urn:nbn:se:kth:diva-99129OAI: oai:DiVA.org:kth-99129DiVA: diva2:541080
2001-07-06, IMIT Seminar room, Isafjordsgatan 39, Kista, 09:00 (English)
Maguire Jr., Gerald Q., Professor
Maguire Jr., Gerald Q., ProfessorMattsson, Johan