Traffic measurement and analysis of the CDMA 2000 1X mobile cellular radio access network : a case study of S-Fone network, Hochiminh City, Vietnam | |
| Author | Thai Thanh Binh |
| Call Number | AIT RSPR no.TC-06-07 |
| Subject(s) | Telecommunication--Vietnam--Ho Chi Minh--Traffic Code division multiple access--Vietnam--Ho Chi Minh |
| Note | A research study submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Research studies project report ; no. TC-06-07 |
| Abstract | The Code Division Multiple Access (CDMA) technology has proven itself to be a promising technology as applied in wireless communications, especially in mobile cellular networks. Thus, the intensive studies are necessarily carried out not only in theory but also in real-life networks. This research serves as the preliminary approach to the traffic measurement and analysis of the Radio Access Network (RAN) of the CDMA 2000 1 X mobile cellular networks. The traffic characteristics and the requirements on the network performance are treated in this research which then can be used as a basis for optimizing and engineering the actual CDMA mobile cellular networks. The case study of this research is performed in the S-Fone CDMA 2000 1X mobile cellular network, in Hochiminh city, Vietnam. Beside the traffic characteristics, for example, traffic profiles, carried traffic, mean holding times of both call and traffic channel, etc. , such important network performance factors as failure rates, failure causes, drop rates as well as drop causes are investigated and evaluated according to the recommendations proposed by LGE Inc., SK Telecom, and Qualcomm. The results of traffic profiles and BHCA (Busy Hour Call Attempt), BHSM (Busy Hour Short Message) profiles show that both voice and SMS traffic have two peaks everyday and they are high on workdays and lower on weekends. The ADPHs (Average Daily Peak Hour) of the carried traffic per cell sometimes are up to 29.4 , 30.3 and 73.5 Erlang for handoff, voice and total traffic respectively. The mean call holding time, channel holding time and handoff channel holding time are 67 s, 34 s and 28 s respectively. Moreover, the call completion rate is about 46 %. Additionally, the handoff probability and handoff rate are approximately 46 % and 52 % respectively. And it is verified that the exponential distribution does not completely fit the call holding time distribution in this CDMA mobile cellular network. The access failure rates are about 3.9 % for voice and 1.21 % for SMS which clearly satisfies the Qualcomm-proposed GOS of 5 %. In addition, no radio access blocking was found. The causes for these failures are the congestion between S-Fone and VNPT (Vietnam Post and Telecommunications) (about 56 %) and insignificantly the failure in BSS (Base Station Subsystem) (3%). The handoff failure rate is roughly 0.1% which far meets the ITU-T E.771 requirement of 1%. The call drop rate is 0.9 % which completely satisfies the LGE-proposed value of 2.2%. The main cause for dropped calls is the degradation in the signal strength (up to 92% of the out-of-coverage cause) |
| Year | 2006 |
| Corresponding Series Added Entry | Asian Institute of Technology. Research studies project report ; no. TC-06-07 |
| Type | Research Study Project Report (RSPR) |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Erke, Tapio ; |
| Examination Committee(s) | Ahmed, Kazi M. ;Teerapat Sanguankotchakorn ; |
| Scholarship Donor(s) | Hochiminh City People Committee; |
| Degree | Research Studies Project Report (M. Eng.) - Asian Institute of Technology, 2006 |