计算机科学 ›› 2021, Vol. 48 ›› Issue (9): 278-285.doi: 10.11896/jsjkx.201200056
夏中, 向敏, 黄春梅
XIA Zhong, XIANG Min, HUANG Chun-mei
摘要： 络的负载均衡性和响应时延是视频监控对等网络重点关注的问题。文中提出了一种基于有限负载一致性哈希的P2P视频监控网络分层管理机制。首先根据节点地理位置将P2P视频监控网络划分为不同的自治域,自治域内分为一层超级节点和多层普通节点,采用节点上行带宽与每条视频传输通道所需带宽的比值作为节点负载上限,当上层节点总负载量到达上限后进行分层,每一层节点均被映射到一个hash环上,并使用CHBL算法控制层内节点的负载均衡。然后采用独立信息数据波动赋权法计算出节点的各指标权重,通过线性加权得到节点综合价值,当节点脱离网络时,选择其子节点层中综合价值最高的节点作为脱离节点的替换节点。在长期运行的网络中,综合价值最高的节点将汇聚到上层。仿真结果表明,相比基于DHT的P2P网络,所提管理机制能有效改善网络的负载均衡性,同时也可降低网络的整体响应时延。
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