2023年国内三大通信运营商的财务报表显示,中国联通、中国电信及中国移动的网络运营及支撑成本达到607亿元、1218亿元和2609亿元,且呈现不断攀升的态势。在5G尚无“杀手级”业务和通信行业市场基本饱和的情况下,运营成本压力不容小视。B...2023年国内三大通信运营商的财务报表显示,中国联通、中国电信及中国移动的网络运营及支撑成本达到607亿元、1218亿元和2609亿元,且呈现不断攀升的态势。在5G尚无“杀手级”业务和通信行业市场基本饱和的情况下,运营成本压力不容小视。BBU(Building Base band Unit,基带处理单元)回局及整合做为降本、提质和增效的一种手段,符合工业和信息化部等七部门联合下发的《信息通信行业绿色低碳发展行动计划(2022—2025年)》文件要求,是落实该行动计划“推广集中化无线接入网架构,进一步节省基站机房、电源、空调等配套需求”的具体举措。文章从BBU回局及整合的角度出发,分析实施难点并提出应对和解决策略,以某地市案例为切入点,阐述锚点机房的选取原则、BBU回局及整合的策略、具体的实施过程和实施效果。展开更多
Data dissemination is an important application in vehicular networks. We observe that messages in vehicular networks are usually subject to both time and space constraints, and therefore should be disseminated during ...Data dissemination is an important application in vehicular networks. We observe that messages in vehicular networks are usually subject to both time and space constraints, and therefore should be disseminated during a specified duration and within a specific coverage. Since vehicles are moving in and out of a region, dis-semination of a message should be repeated to achieve reliability. However, the reliable dissemination for some messages might be at the cost of unreliable or even no chance of dissemination for other messages, which raises tradeoffs between reliability and fairness. In this paper, we study the scheduling of data dis-semination in vehicular networks with mesh infrastructure. Firstly, we propose performance metrics for both reliability and fairness. Factors on both the time and space dimensions are incorporated in the reliability met-ric and the fairness in both network-wide and Mesh Roadside Unit-wise (MRU-wise) senses are considered in the fairness metric. Secondly, we propose several scheduling algorithms: one reliability-oriented algorithm, one fairness-oriented algorithm and three hybrid schemes. Finally, we perform extensive evaluation work to quantitatively analyze different scheduling algorithms. Our evaluation results show that 1) hybrid schemes outperform reliability-oriented and fairness-oriented algorithms in the sense of overall efficiency and 2) dif-ferent algorithms have quite different characteristics on reliability and fairness.展开更多
文摘2023年国内三大通信运营商的财务报表显示,中国联通、中国电信及中国移动的网络运营及支撑成本达到607亿元、1218亿元和2609亿元,且呈现不断攀升的态势。在5G尚无“杀手级”业务和通信行业市场基本饱和的情况下,运营成本压力不容小视。BBU(Building Base band Unit,基带处理单元)回局及整合做为降本、提质和增效的一种手段,符合工业和信息化部等七部门联合下发的《信息通信行业绿色低碳发展行动计划(2022—2025年)》文件要求,是落实该行动计划“推广集中化无线接入网架构,进一步节省基站机房、电源、空调等配套需求”的具体举措。文章从BBU回局及整合的角度出发,分析实施难点并提出应对和解决策略,以某地市案例为切入点,阐述锚点机房的选取原则、BBU回局及整合的策略、具体的实施过程和实施效果。
文摘Data dissemination is an important application in vehicular networks. We observe that messages in vehicular networks are usually subject to both time and space constraints, and therefore should be disseminated during a specified duration and within a specific coverage. Since vehicles are moving in and out of a region, dis-semination of a message should be repeated to achieve reliability. However, the reliable dissemination for some messages might be at the cost of unreliable or even no chance of dissemination for other messages, which raises tradeoffs between reliability and fairness. In this paper, we study the scheduling of data dis-semination in vehicular networks with mesh infrastructure. Firstly, we propose performance metrics for both reliability and fairness. Factors on both the time and space dimensions are incorporated in the reliability met-ric and the fairness in both network-wide and Mesh Roadside Unit-wise (MRU-wise) senses are considered in the fairness metric. Secondly, we propose several scheduling algorithms: one reliability-oriented algorithm, one fairness-oriented algorithm and three hybrid schemes. Finally, we perform extensive evaluation work to quantitatively analyze different scheduling algorithms. Our evaluation results show that 1) hybrid schemes outperform reliability-oriented and fairness-oriented algorithms in the sense of overall efficiency and 2) dif-ferent algorithms have quite different characteristics on reliability and fairness.
