CAJ | 학술논문

异构无线网络环境下，智能切换关键要素是提供有保障质量和连接性的服务。针对传统基于接收信号强度的切换判决，在减少不必要切换、呼叫掉线、呼叫阻塞和切换阻碍等方面存在的缺陷，提出切换评估模型。切换判决前，在终端收集网络、用户信息；基于四种通信类型的通信需求，确定网络QoS参数权重值；使用模糊分析方法进行参数量化，将数值并行输入到模糊逻辑器，得到切换评估值，从而得到切换与否的判决。仿真结果显示提出的模型在减少不必要切换、呼叫掉线有较好的表现，能更好地保证连接性和服务质量，从而达到更高的用户满意水平。
이구무선망락배경하，지능절환관건요소시제공유보장질량화련접성적복무。침대전통기우접수신호강도적절환판결，재감소불필요절환、호규도선、호규조새화절환조애등방면존재적결함，제출절환평고모형。절환판결전，재종단수집망락、용호신식；기우사충통신류형적통신수구，학정망락QoS삼수권중치；사용모호분석방법진행삼수양화，장수치병행수입도모호라집기，득도절환평고치，종이득도절환여부적판결。방진결과현시제출적모형재감소불필요절환、호규도선유교호적표현，능경호지보증련접성화복무질량，종이체도경고적용호만의수평。
In heterogeneous wireless network environment, one of the key ingredients to provide guaranteed quality and continuity of service is the design of intelligent handoff algorithms. Traditional handoff decision algorithms, such as Received Signal Strength ( RSS) based, are not efficient enough to minimize the number of unnecessary handoffs, decision delays, and call-dropping. A handoff necessity evaluation model of heterogeneous wireless network based on fuzzy logic was proposed. Firstly collected the information based on four traffic types, secondly obtained the weights of QoS and normalized the information, finally a parallel fuzzy logic controller were utilized to implement handoff necessity evaluation. The experimental results show that proposed model can effectively minimize the number of unnecessary handoffs and call-dropping, and provide guaranteed quality and continuity of service, in order to obtain better users' satisfaction.