Call admission control for High Speed Downlink Packet Access (HSDPA) | |
| Author | Phuyal, Umesh |
| Call Number | AIT Thesis no.ICT-06-05 |
| Subject(s) | Mobile communication systems Very high speed integrated circuits Code division multiple access |
| Note | A thesis submitted in the partial fulfillment of the requirement for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ICT-06-05 |
| Abstract | The internet driven packet based download traffic demand is expected to increase rapidly with all kind of services integrated to packet data form. To combat the possible problems arose by this demand, 3GPP, in its release 5, has standardized High Speed Downlink Packet Access (HSDPA) as an evolution to the WCDMA based system. The increase in spectral efficiency and user data rates of HSDPA makes it feasible to fulfill the streaming service requirements of users. However, as the capacity is always limited, a well-designed radio resource management scheme is required where the call admission control (CAC) plays an important role for efficient use of scarce radio resources. A few number of CAC are already available in literature, but they do not seem promising for streaming services in HSDPA because of HSDPA architectural changes and QoS requirements of streaming services such as bounded delay and guaranteed minimum bit rate. A very recent CAC for HSDPA known as Iterative Active Link Protection (IALP) CAC proposed by Jantti and Rawi in 2005 September guarantees the minimum bit rate, but still suffers from many other drawbacks such as very slow decision of accepting or rejecting a call, high dropping of ongoing calls etc. A new CAC for streaming services over HSDPA is proposed in this thesis, which is named as Fast IALP CAC. This CAC algorithm provides a significantly reduced probability of dropping, unsatisfied calls and total outage, while at the same time guarantying the minimum bit rate, fast response with reduced decision delay, high system throughput as well as parameters to tune the performance tradeoffs according to the need. With the help of link level simulations, the performance of the proposed CAC, the IALP CAC existing in literature and system with no CAC is evaluated. It is observed that the Fast IALP outperforms the IALP CAC with nearly halved probability of dropping and unsatisfied calls and improvement in decision speed by nearly three times. The new algorithm is better than the system with no CAC as it provides less than half the probability of dropping or unsatisfied calls. |
| Year | 2006 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ICT-06-05 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Information and Communication Technology (ICT) |
| Chairperson(s) | Ahmed, Kazi M.; |
| Examination Committee(s) | Rajatheva, Premanandana; Erke, Tapio J. Dr. Badii Jouaber (; |
| Scholarship Donor(s) | Government of Finland;Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2006 |