计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2015年
1期
92-96
,共5页
无线网络%QoS保障%QoS垂直映射%等效容量%瑞利平坦衰减信道
無線網絡%QoS保障%QoS垂直映射%等效容量%瑞利平坦衰減信道
무선망락%QoS보장%QoS수직영사%등효용량%서리평탄쇠감신도
wireless networks%QoS assurance%QoS vertical mapping%effective capacity%Rayleigh flat fading channel
无线网络通信中为提供QoS保障，提高链路可靠性和有效性是十分关键的。通信协议中与链路相关的协议层包括物理层和数据链路层。物理层技术以提高物理层性能为目标，数据链路层技术以提高数据链路层性能为目标并受物理层技术制约。为保障可靠通信链路，提出一种无线网络中物理层和数据链路层QoS指标垂直映射结构，并通过等效容量方法实现低信噪比状态下瑞利平坦衰减信道QoS垂直映射；仿真结果验证了所提出模型的有效性。
無線網絡通信中為提供QoS保障，提高鏈路可靠性和有效性是十分關鍵的。通信協議中與鏈路相關的協議層包括物理層和數據鏈路層。物理層技術以提高物理層性能為目標，數據鏈路層技術以提高數據鏈路層性能為目標併受物理層技術製約。為保障可靠通信鏈路，提齣一種無線網絡中物理層和數據鏈路層QoS指標垂直映射結構，併通過等效容量方法實現低信譟比狀態下瑞利平坦衰減信道QoS垂直映射；倣真結果驗證瞭所提齣模型的有效性。
무선망락통신중위제공QoS보장，제고련로가고성화유효성시십분관건적。통신협의중여련로상관적협의층포괄물리층화수거련로층。물리층기술이제고물리층성능위목표，수거련로층기술이제고수거련로층성능위목표병수물리층기술제약。위보장가고통신련로，제출일충무선망락중물리층화수거련로층QoS지표수직영사결구，병통과등효용량방법실현저신조비상태하서리평탄쇠감신도QoS수직영사；방진결과험증료소제출모형적유효성。
Reliability and efficiency channel is critical for QoS assurance in wireless network communication. The protocol layers correlated with channel are physical layer and data link layer. The techniques adopted in physical layer is for developing physical layer performances, the techniques adopted in data link layer is for developing data link layer performances which are limited by physical layer performances. In order to assure channel quality, a QoS vertical mapping structure between physical layer and data link layer is proposed, and the structure based on the effective capacity in low SNR ralyeigh flat fading channel is actualized, finally the simulation results verify the model.
