| Author | Sirisak Yiengsrimuang |
| Call Number | AIT RSPR no. TC-01-04 |
| Subject(s) | Asynchronous transfer mode
|
| Note | A research study submitted in partial fulfillment of the requirement for the degree of Master
of Engineering, School of Advanced Technologies |
| Publisher | Asian Institute of Technology |
| Series Statement | Research studies project report ; no. TC-01-04 |
| Abstract | The Wireless Asynchronous Transfer Mode (WA TM) is a combination between
Asynchronous Transfer Mode (A TM) and wireless technologies. It increases the
capabilities of A TM to provide multimedia service to mobile users. When mobile users are
moving between different areas of base stations, the handover process is required to
handle the services. To provide lossless handover, the cell buffering is required. However,
it can induce cell delay variation (CDV) which impact to CBR type video service.
(Thongjuapet, 2000) proposed the downstream buffer analysis at mobile terminal (MT)
and base station (BS) to suppress cell loss and CDV for homogeneous case. To study the
behavior of buffer at MT and BS for heterogeneous case, thus this is the interesting topic
to study of this research.
In this research, we study the behavior of buffer at MT and BS for heterogeneous
case under the same conditions as homogeneous case. The distribution of BS and MT
buffer size occupancy, cell loss ratio and cell delay variation are observed in this study. we
can conclude that the shape of distribution and the range of BS buffer sizes are affected by
the handover-cross-load. When the numbers of each type of source are changed under the
same handover-cross-load, it does not have much impact to the distribution of BS buffer
size. To compare the distribution of BS buffer occupancy size of both heterogeneous case
and homogeneous case, we can conclude that under the same environment, the properties
of BS buffer behavior for both cases are not different. For cell loss ratio, the characteristic
of cell loss ratio is decreased sharply when cell loss ratio is lower than 10-
3
, under this cell
loss ratio the range of BS buffer sizes is wider when handover-cross-load is high. For MT
buffer, the downstream transmission rate of network (Rd) affects to the MT input
interruption time, which controls the distribution of buffer size. The transmission rate of
MT source (Rm) impacts to the size of MT buffer. The size of MT buffer can absorb the
jitter at the output of MT buffer. |
| Year | 2001 |
| Corresponding Series Added Entry | Asian Institute of Technology. Research studies project report ; no. TC-01-04 |
| Type | Research Study Project Report (RSPR) |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Teerapat Sanguankotchakorn ; |
| Examination Committee(s) | Ahmed, Kazi M.;Erke, Tapio; |
| Degree | Research Studies Project Report (M. Eng.) - Asian Institute of Technology, 2001 |