1746-OB32E
1746-OB32E
ILA路由度量
首先對現(xiàn)有的干擾負載感知路由度量進行簡要介紹,如式(1)所示:
其中,p為路徑,n為鏈路數(shù),m為鏈路l上的節(jié)點數(shù)。MTI(Metric of Traffic Interference)捕捉流間干擾如式(2)所示,CSC(Channel Switching Cost)捕捉流內(nèi)干擾。參數(shù)是用來權衡流內(nèi)干擾和流間干擾的權重。
其中,ALLij(Average Interference Load)是在信道C上節(jié)點i、j之間干擾鄰居節(jié)點的平均負載。ETT用來確定傳輸速率和丟包率的差別。AIL描述干擾節(jié)點的鄰居節(jié)點活躍性,定義為:
其中,ILij(C)是干擾鄰居的負載,用平均隊列長度來表示。
CSC通過給定使用同一信道的連續(xù)鏈路更高的權重來減少流內(nèi)干擾,下文將詳細討論。
ILA路由度量捕捉了流間和流內(nèi)干擾,但仍存在局限性。
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