Downlink traffic modeling and analysis for push to talk over cellular | |
| Author | Arefin, Khandakar Rashedul |
| Call Number | AIT RSPR no.ICT-08-04 |
| Subject(s) | Telephone systems Telephone calls |
| Note | Submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Information and Communications Technologies, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Research studies project report ; no. ICT-08-04 |
| Abstract | The General Packet Radio Services (GPRS) is a packet oriented Mobile data services which supports IF based data transmission in GSM network. Push to Talk over Cellular (PoC) is a half duplex voice communication which is based on IF capable network, such as GPRS network. This research study aims at the modeling and analysis of Push-to- Talk over Cellular (PoC) downlink traffic in packet level. The cellular network (GSM) is considered of carrying traditional circuit switched voice call and packet switched data traffic, which is GPRS traffic. PoC traffic is considered as packet switched voice traffic. In this research study the group forming behavior is studied, modeled and simulated. The Ad hoc and prearranged group is modeled as Binomial model, while the chat group is modeled as Erlang model. The floor control traffic is modeled as Poison model and the voice traffic is modeled as ON OFF model. The simulation is written in Java programming language. In the network total 32 channels are considered as traffic channel among those 20 channels are dedicated for traditional voice call, 8 channels are dedicated for GPRS traffic and remaining 4 channels are for complete sharing among voice calls and GPRS with voice . call priority. Here FCFS queuing model is followed for the queuing and Fair Share Round Robin scheduling algorithm is used for the scheduling the PoC traffic along with the other GPRS packet traffic. There are different modes of PoC operation which includes Group formation mode, user answering mode and session mode. The effect of these modes and group size on PoC traffic (signaling) are studied and analyzed in this research study. While packets are transmitted through the network, there is some delay. PoC traffic is a unimulticasting type of traffic. So there is a large influence of the number of group size. The traffic is also sharing the available radio resources with the GPRS traffic. So there is also an influence of the GPRS traffic on the delay. These delays have been studying in this research work |
| Year | 2008 |
| Corresponding Series Added Entry | Asian Institute of Technology. Research studies project report ; no. ICT-08-04 |
| Type | Research Study Project Report (RSPR) |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Information and Communication Technology (ICT) |
| Chairperson(s) | Erke, Tapio; |
| Examination Committee(s) | Ahmed, Kazi M.;Teerapat Sanguankotchakorn; |
| Scholarship Donor(s) | Government of Finland;Asian Institute of Technology Fellowship; |
| Degree | Research Studies Project Report (M. Eng.) - Asian Institute of Technology, 2008 |