资源描述：
《优化的车辆控制系统》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、IEEETRANSACTIONSONVEHICULARTECHNOLOGY,VOL.VT-21,NO.2,MAY197267spatialdemandprofilehaslittleeffectontheforcedcalltermi-assignmentsystems)mainlyontheaveragedemandwithinthatnationrateofthedynamicchannelassignmentsystem.Astheintervalandnotverystronglyupon
2、thedistributionofthatde-call-attemptrateincreases,forcedterminationsareincreasedmand.Inthefixedchannelassignmentsystem,fluctuationsinastheamplitudeoftheperiodicdemandprofileincreases.Thethespatialdemanddistributionawayfromthedesigndistribu-simulationw
3、asnotrunfortheFIXSYSwithnonuniformspa-tionalwaysdegradesystemperformance.tialdemand.Theuseofdynamicchannelassignmentrelaxestherequire-mentforpreciseestimationofthedistributionofuserde-V.COMMENTSANDCONCLUSIONSmand;thatis,fordynamicchannelassignmentanes
4、timateThedesignoflarge-scalemobileradiosystemswillbebasedoftheuserdemandisrequiredonlyoverareuseinterval,uponanestimateduserdemand.Theseestimatesarelikelytowhereasinafixedchannelassignmentsystemtheseestimatesbeapproximatebecauseoflackofcurrentknowledg
5、eofusermustbemadeonacell-by-cellbasis.requirementsinatrulyhgh-capacityenvironment.Forthepurposesofthisstudytheaveragebusinessdayspatialdis-REFERENCEStributionofcallattemptswasassumedtobeuniform.There[11H.J.Schulte,Jr.,andW.A.Cornell,“Multi-areamobilet
6、elephonedlbeshort-term(day-to-dayorhour-to-hour)fluctuationssystem,”IREnuns.Veh.Commun.!vol.VC-9,pp.49-53,Mayaboutthslong-termaverage.Forthesereasonsaknowledge1960.21L.Schiff,“Trafficcapacityofthreetypesofcommon-usermobileofthesensitivityoftheperforma
7、nceofvarioussystemstoradiocommunicationsystems,”ZEEETrans.Commun.Technol.,fluctuationsinthespatialdistributionofcallattemptsisofvol.COM-18,pp.12-21,Feb.1970.[.31K.Araki.“Fundamentaluroblemsofnationwidemobileradiomajorimportance.telephonesystem,”Rev.Be
8、c.Commun.Lab.,vol.16,pp.357-Itwasfoundthatthedynamicchannelassignmentsystems373,May-June1968.wereinsensitivetotheperiodicspatialdemanddistributions[4]R.H.Frenkiel,“Ahigh-capacitymobileradiotelephonesystemmodelusingacoordinatedsmall-zoneapproac
