| Author | Vanicha Sangvomvetphan |
| Call Number | AIT Thesis no.TC-00-4 |
| Subject(s) | elecommunication--Traffic
|
| Note | A thesis submitted in 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. TC-00-04 |
| Abstract | Bluetooth is a wireless ad-hoc network concept intended to eliminate the cables
between cordless phones, laptops, wireless headsets, etc. Bluetooth radio operates in the
unlicensed ISM band at 2.4 GHz with a transmission power in the range of - 30 to 20 dBm.
The Bluetooth radio nodes form ad-hoc networks called piconets offering a gross bit rate of
lMbit/s and allowing a mix of voice and data traffic. Furthermore, the system provides full
duplex transmission on slotted Time Division Duplex (TDD) scheme in which each slot is
0.625 ms long.
This thesis work studies traffic performance in a piconet that consists of two data
sources, one voice source, one WLAN point, and a master. A mix of data and voice traffic is
used in the simulation where data traffic streams are modeled by IBP process (Interrupted
Bernoulli Process). The scheduling schemes, Priority and Round Robin, are studied and
compared under various operating conditions. Input traffic sources with different burstiness,
load, and queue size are used.
Simulation results show that voice traffic has no loss and delay because it can be sent
in reserved slots but data traffic has to use polling algorithms for allocating bandwidth to
different sources. For high burstiness, delay and loss of data traffic are high if there is no
buffer. However when a suitable buffer size is applied, loss and delay can be minimized.
When total load exceeds available capacity, total packet loss in Priority scheme is close to
Non Strictly Round Robin scheme but the lower priority demonstrates low performance.
Round Robin scheme allows a guaranteed bandwidth distributed fairly to all sources.
Performance of Strictly Round Robin is worst because strictly dedicated unused slots can not
be allocated to other traffic component. |
| Year | 2000 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. TC-00-04 |
| Type | Thesis |
| 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.;Rajatheva, RM.AP. ; |
| Scholarship Donor(s) | Sonera, Finland; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2000 |