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IP VPN技术特点

VPN可分为传统意义的VPN和IP VPN。所谓传统意义上的VPN，即在DDN网或公用分组交换网或帧中继网上组建VPN，并具有一个共同的特点，即利用DDN网或公用分组交换网或帧中继网的部分网络资源如传输线路、网络模块、网络端口等划分成一个分区，并设置相对独立的网络管理机构，对分区的各节点共享分区内的网络资源，它们之间的数据处理和传送相对独立，就好像真正的专用网一样。所谓IP

A Distributed Cell Outage Compensation Mechanism Based on RS Power Adjustment in LTE Networks

To solve the coverage and quality problems caused by cell outage in LTE networks, this paper proposes a distributed self-organizing networks management architecture and a distributed cell outage compensation management mechanism. After detecting and analyzing the outage, a cell outage compensation algorithm based on reference signal power adjustment is proposed. The simulation results show that the proposed mechanism can mitigate the performance degradation significantly. Compared with other algorithms, the proposed scheme is more effective in compensating the coverage gap induced by cell outage

从3721再成被告看其强势公关的弊端

3721与 CNNIC 的争斗已经从明刀暗枪进入了“一山不容二虎”的局面。6月11日,CNNIC 以中科院计算机网络信息中心的名义将3721告上了法庭。对此事,本刊此次特刊出两位读者对此事的不同见解。思维创造价值一直是《IT 时代周刊》的办刊理念,因此,本刊特设的“争鸣”栏目,发表读者的不同意见,希望给大家一个思维碰撞的契机。