การปรับปรุงวิธีการกำหนดช่องสัญญาณแบบพลวัตที่มีการควบคุมแบบกระจายในระบบโทรศัพท์เคลื่อนที่จีเอสเอ็ม / พรรษา อุดมลาภสกุล = Improvement of distributed dynamic channel allocation scheme for GSM mobile telephone system / Punsa Udomlapsakun
This thesis proposes an improvement of channel assignment which is a dynamic and distributed scheme. This proposed method combines two techniques, priority and intrahandover modified from channel segregation and aggressive methods. เท aggressive technique, we utilized polite aggressive and persistent polite aggressive which are more stable. The proposed methods are called SEG-PA and SEG-PPA. Performance is also evaluated based on blocking rate, increasing traffic capacity at 2 percent of blocking rate and intrahandover rate. The simulation results show that for SEG-PA, blocking rate is slightly better than that of SEG. Traffic capacity increases at an average of 3.09 percent for uniform and 2.33 percent for nonuniform traffic with a few increase in intrahandover rate ranging between 2 and 9 percent. For SEG-PPA, blocking rate is significantly better than that of SEG. Traffic capacity increases at an average of 10.50 percent for unifrom traffic and 13.02 percent for nonuniform traffic but intrahandover rate is also high ranging between 8 and 24 percent, 2-3 times higher compared to SEG-PA.
