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Max-Min Fair RIS-Aided Rate-Splitting Multiple Access for Multigroup Multicast Communications 被引量:1
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作者 Tiantian Li Haixia Zhang +1 位作者 Shuaishuai Guo Dongfeng Yuan 《China Communications》 SCIE CSCD 2023年第1期184-198,共15页
Rate-splitting multiple access(RSMA)can cope with a wide range of propagation conditions in multigroup multicast communications through rate splitting optimization.To breakthrough the grouprate limited bottleneck,reco... Rate-splitting multiple access(RSMA)can cope with a wide range of propagation conditions in multigroup multicast communications through rate splitting optimization.To breakthrough the grouprate limited bottleneck,reconfigurable intelligent surface(RIS)technique can be introduced to assist wireless communications through enhancing the channel quality.In RIS-aided RSMA multigroup multicasting,how to provide fair and high-quality multiuser service under power and spectrum constraints is essential.In this paper,we propose a max-min fair RIS-aided rate-splitting multiple access(MMF-RISRSMA)scheme for multigroup multicast communications,where the rate fairness is obtained by maximizing the minimum group-rate.In doing so,we jointly optimize the beamformers,the rate splitting vector at the transmitter,as well as the phase shifts at RIS.To solve it,we divide the original optimization problem into two subproblems and alternately optimize the variables.The beamforming and rate splitting optimization subproblem is solved by using the successive convex approximation technique.The phase shift optimization subproblem is solved through the penalty function method to achieve a rank-one locally optimal solution.Simulations demonstrate that the proposed MMF-RIS-RSMA scheme can obtain significant performance gain in terms of the minimum group-rate. 展开更多
关键词 multigroup multicast communications rate-splitting multiple access(RSMA) reconfigurable intelligent surfaces(RIS) max-min fairness(MMF)
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Coded Multicasting for Content Delivery over Predictable Time-Varying Satellite Communication Networks
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作者 Fan Xu Shuo Shao +3 位作者 Meixia Tao Qin Huang Qifa Yan Xiaohu Tang 《China Communications》 SCIE CSCD 2023年第6期339-367,共29页
With the development of astronautic technology, communication satellites now have a tremendous gain in both quantity and quality, and have already shown their capability on multi-functional converged communication oth... With the development of astronautic technology, communication satellites now have a tremendous gain in both quantity and quality, and have already shown their capability on multi-functional converged communication other than telecommunication. Under this circumstance, increasing the transmission efficiency of satellite communication network becomes a top priority. In this paper, we focus on content delivery service on satellite networks, where each ground station may have prefetched some file fragments. We cast this problem into a coded caching framework so as to exploit the coded multicast gain for minimizing the satellite communication load. We first propose an optimization-based coded multicast scheme by considering the special property that the satellite network topology is predictable and timevariant. Then, a greedy based fast algorithm is proposed, which can tremendously reduce the computation complexity with a small loss in optimality. Simulation experiments conducted on two Walker constellation satellite networks show that our proposed coded multicast method can efficiently reduce the communication load of satellite networks. 展开更多
关键词 satellite communication content delivery coded multicast greedy algorithm
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Generation of Low-Delay and High-Stability Multicast Tree
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作者 Deshun Li Zhenchen Wang +5 位作者 Yucong Wei Jiangyuan Yao Yuyin Tan Qiuling Yang Zhengxia Wang Xingcan Cao 《Computers, Materials & Continua》 SCIE EI 2023年第7期561-572,共12页
Delay and stability are two key factors that affect the performance of multicast data transmission in a network.However,current algorithms of tree generation hardly meet the requirements of low delay and high sta-bili... Delay and stability are two key factors that affect the performance of multicast data transmission in a network.However,current algorithms of tree generation hardly meet the requirements of low delay and high sta-bility simultaneously.Given a general network,the generation algorithm of a multicast tree with minimum delay and maximum stability is an NP-hard problem,without a precise and efficient algorithm.To address these challenges,this paper studies the generation of low-delay and high-stability multicast trees under the model of spanning tree based on stability probability,degree-constrained,edge-weighted for multicast(T-SDE).A class of algorithms was proposed which creates the multicast tree greedy on the ratio of fan-out to delay(RFD)and probability of stability of terminal to obtain a high performance in multicast.The proposed algorithms greedily select terminals with a large RFD and a high probability of stability as forwarding nodes in the generation of the multicast tree,where the larger RFD and higher stability of upstream nodes are beneficial to achieve a low transmission delay and high stability in multicast.The proposed RFD can be compatible with the original model,which can take advantage of network connectivity during the generation of a multicast tree.This paper carries out simulation experiments on Matlab R2016b to measure the performance of the proposed algorithm.Experimental results show that the proposed algorithm can provide a smaller height,higher stability,and a lower transmission delay of the resulting multicast tree than other solutions.The spanning tree of the proposed algorithms can support low transmission delay and high stability in multicast transmission. 展开更多
关键词 Overlay network multicast tree transmission delay probability of stability greedy algorithm
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Application Layer Multicast Model with Low Delay and High Stability
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作者 廖小飞 宣益亮 +1 位作者 宿轩策 李德敏 《Journal of Donghua University(English Edition)》 CAS 2023年第1期74-79,共6页
As an alternative of Internet protocol(IP)multicast,application layer multicast(ALM)is widely used with the advantage of simplicity and flexibility.However,the existing problems of large transmission delay and poor st... As an alternative of Internet protocol(IP)multicast,application layer multicast(ALM)is widely used with the advantage of simplicity and flexibility.However,the existing problems of large transmission delay and poor stability limit the application and development.In this article,to solve these problems,an ALM model based on node potential(NP)and topological index(TI)is proposed.The proposed model considers the factors of node capability and node distance in constructing and maintaining multicast tree to reduce transmission delay and increase stability,and thus it improves the application level in real-time multimedia multicast.The computer simulations prove that the proposed model reduces the ALM transmission delay,increases multicast tree stability effectively,and improves the ALM performance,and therefore it is suitable to apply in large-scale real-time multimedia environment. 展开更多
关键词 application layer multicast(ALM) high stability low delay node potential(NP) topological index(TI)
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Opportunistic Relaying Technique over Rayleigh Fading Channel to Improve Multicast Security
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作者 Md. Shamim Hossain Md. Zahurul Islam Sarkar 《Journal of Computer and Communications》 2023年第8期134-148,共15页
The performance of Rayleigh fading channels is substantially impacted by the impacts of relays, antennas, and the number of branches. Opportunistic relaying is a potent technique for enhancing the effects of the afore... The performance of Rayleigh fading channels is substantially impacted by the impacts of relays, antennas, and the number of branches. Opportunistic relaying is a potent technique for enhancing the effects of the aforementioned factors while enhancing the performance of fading channels. Due to these issues, a secure wireless multicasting scenario using opportunistic relaying over Rayleigh fading channel in the presence of multiple wiretappers is taken into consideration in this study. So the investigation of a secure wireless multicasting scenario using opportunistic relaying over Rayleigh fading channel in the presence of multiple wiretappers is the focus of this paper. The primary goals of this study are to maximize security in wireless multicasting while minimizing security loss caused by the effects of relays, branches at destinations and wiretappers, as well as multicast users and wiretappers through opportunistic relaying. To comprehend the insight effects of prior parameters, the closed form analytical expressions are constructed for the probability of non-zero secrecy multicast capacity (PNSMC), ergodic secrecy multicast capacity (ESMC), and secure outage probability for multicasting (SOPM). The findings demonstrate that opportunistic relaying is a successful method for reducing the loss of security in multicasting. 展开更多
关键词 Ergodic Secrecy multicast Capacity Probability of Non-Zero Secrecy multicast Capacity Secure Wireless multicasting Secure Outage Probability for multicasting
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Secure Wireless Multicasting through Nakagami-m Fading Channels with Multi-Hop Relaying
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作者 Md. Mizanur Rahman Md. Zahurul Islam Sarkar Mohammad Mahmud Hasan 《Journal of Computer and Communications》 2023年第5期177-193,共17页
The additional diversity gain provided by the relays improves the secrecy capacity of communications system significantly. The multiple hops in the relaying system is an important technique to improve this diversity g... The additional diversity gain provided by the relays improves the secrecy capacity of communications system significantly. The multiple hops in the relaying system is an important technique to improve this diversity gain. The development of an analytical mathematical model of ensuring security in multicasting through fading channels incorporating this benefit of multi-hop relaying is still an open problem. Motivated by this issue, this paper considers a secure wireless multicasting scenario employing multi-hop relaying technique over frequency selective Nakagami-m fading channel and develops an analytical mathematical model to ensure the security against multiple eavesdroppers. This mathematical model has been developed based on the closed-form analytical expressions of the probability of non-zero secrecy multicast capacity (PNSMC) and the secure outage probability for multicasting (SOPM) to ensure the security in the presence of multiple eavesdroppers. Moreover, the effects of the fading parameter of multicast channel, the number of hops and eavesdropper are investigated. The results show that the security in multicasting through Nakagami-m fading channel with multi-hop relaying system is more sensitive to the number of hops and eavesdroppers. The fading of multicast channel helps to improve the secrecy multicast capacity and is not the enemy of security in multicasting. 展开更多
关键词 Frequency Selective Fading Multi-Hop Relaying Probability of Non-Zero Secrecy multicast Capacity Secure Outage Probability for multicasting
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5G车联网中安全高效的组播服务认证与密钥协商方案 被引量:1
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作者 张应辉 李国腾 +2 位作者 韩刚 曹进 郑东 《电子与信息学报》 EI CAS CSCD 北大核心 2024年第7期3026-3035,共10页
5G车联网(5G-V2X)中,内容提供者通过以点对多的传输方式向属于特定区域的一组车辆提供服务消息。针对于车辆获取组播服务遭受的安全威胁与隐私泄露问题,该文提出一种认证和密钥协商方案用于内容提供者与车辆之间的组播服务消息传输。首... 5G车联网(5G-V2X)中,内容提供者通过以点对多的传输方式向属于特定区域的一组车辆提供服务消息。针对于车辆获取组播服务遭受的安全威胁与隐私泄露问题,该文提出一种认证和密钥协商方案用于内容提供者与车辆之间的组播服务消息传输。首先,采用无证书聚合签名技术批量验证群组内所有车辆,提高了认证请求的效率。其次,基于多项式密钥管理技术实现安全的密钥协商,使得非法用户或核心网络无法获取共享会话密钥。最后,实现了群组内车辆的动态密钥更新机制,当车辆加入或离开群组时,内容提供者只需要发送1条密钥更新消息即可更新会话密钥。基于形式化验证工具和进一步安全性分析表明,所提方案可以保证匿名性、不可链接性、前向和后向安全性以及抗共谋攻击等安全需求。与现有方案相比,计算效率提高了约34.2%。 展开更多
关键词 5G车联网 认证 密钥协商 动态群组 组播
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MRNDA:一种基于资源受限片上网络的深度神经网络加速器组播机制研究
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作者 欧阳一鸣 王奇 +2 位作者 汤飞扬 周武 李建华 《电子学报》 EI CAS CSCD 北大核心 2024年第3期872-884,共13页
片上网络(Network-on-Chip,NoC)在多处理器系统中得到了广泛的应用.近年来,有研究提出了基于NoC的深度神经网络(Deep Neural Network,DNN)加速器.基于NoC的DNN加速器设计利用NoC连接神经元计算设备,能够极大地减少加速器对片外存储的访... 片上网络(Network-on-Chip,NoC)在多处理器系统中得到了广泛的应用.近年来,有研究提出了基于NoC的深度神经网络(Deep Neural Network,DNN)加速器.基于NoC的DNN加速器设计利用NoC连接神经元计算设备,能够极大地减少加速器对片外存储的访问从而减少加速器的分类延迟和功耗.但是,若采用传统的单播NoC,大量的一对多数据包会极大的提高加速器的通信延迟.并且,目前的深度神经网络规模往往非常庞大,而NoC的核心数量是有限的.因此,文中提出了一种针对资源受限的NoC的组播方案.该方案利用有限数量的处理单元(Processor Element,PE)来计算大型的DNN,并且利用特殊的树形组播加速网络来减少加速器的通信延迟.仿真结果表明,和基准情况相比,本文提出的组播机制使加速器的分类延迟最高降低了86.7%,通信延迟最高降低了88.8%,而它的路由器面积和功耗仅占基准路由器的9.5%和10.3%. 展开更多
关键词 片上网络 深度神经网络加速器 组播 路由器架构 多物理网络
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基于流水线计算的3D NoC测试规划研究
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作者 胡聪 白杨 +2 位作者 周甜 朱爱军 许川佩 《计算机应用与软件》 北大核心 2024年第5期240-246,303,共8页
为了提高三维片上网络(3D NoC)资源内核的测试效率,提出一种在功耗约束条件下多播流水线并行测试同构核与单播测试异构核相结合的方法对IP核进行测试。为了减少测试数据因资源冲突而进行等待的时间,设计一种改进XYZ路由算法,并采用改进... 为了提高三维片上网络(3D NoC)资源内核的测试效率,提出一种在功耗约束条件下多播流水线并行测试同构核与单播测试异构核相结合的方法对IP核进行测试。为了减少测试数据因资源冲突而进行等待的时间,设计一种改进XYZ路由算法,并采用改进人工蜂群(ABC)算法求解最佳测试规划方案。以国际标准电路测试集ITC'02作为实验对象,结果表明,测试时间最大优化率达到15.45%,与其他测试规划方法相比该文方法能有效地提高并行测试效率。 展开更多
关键词 三维片上网络 流水线计算 多播通信 测试规划 人工蜂群算法
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基于遗传-蚁群优化算法的QoS组播路由算法设计 被引量:1
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作者 史郑延慧 何刚 《科学技术与工程》 北大核心 2024年第11期4626-4632,共7页
为了提高网络路由性能,提出并设计了一种基于遗传-蚁群优化算法的服务质量(quality of service,QoS)组播路由算法。首先,设计了自适应变频采集策略用于采集网络与节点信息,以此获得网络和节点的状态,为后续路由优化提供数据支持;其次,... 为了提高网络路由性能,提出并设计了一种基于遗传-蚁群优化算法的服务质量(quality of service,QoS)组播路由算法。首先,设计了自适应变频采集策略用于采集网络与节点信息,以此获得网络和节点的状态,为后续路由优化提供数据支持;其次,计算路径代价,将路径代价最小作为优化目标,建立QoS组播路由优化模型,并设置相关约束条件;最后,结合遗传算法和蚁群算法提出一种遗传-蚁群优化算法求解上述模型,输出最优路径,完成路由优化。实验结果表明,所提算法可有效降低路径长度与路径代价,提高搜索效率与路由请求成功率,优化后的路由时延抖动较小。 展开更多
关键词 遗传算法 数据采集 QoS组播路由优化 蚁群算法 路径代价
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一种基于RTP/Multicast的流媒体传输系统设计 被引量:3
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作者 吴敏强 周俊 +2 位作者 朱晴波 陆桑璐 陈道蓄 《计算机工程》 CAS CSCD 北大核心 2004年第9期162-165,共4页
流媒体技术是当前研究和开发的一个热点。在开发基于多服务器的大规模流媒体服务器平台中,该文提出了一种基于RTP/Multicast的流媒体传输系统。这个传输系统实现了统一传输模型,即单播和组播配合实现对热门影片的组播,还实现了基于R... 流媒体技术是当前研究和开发的一个热点。在开发基于多服务器的大规模流媒体服务器平台中,该文提出了一种基于RTP/Multicast的流媒体传输系统。这个传输系统实现了统一传输模型,即单播和组播配合实现对热门影片的组播,还实现了基于RTCP反馈的简单流量控制算法NFC。该系统已经实现,并在做进一步的完善。 展开更多
关键词 流媒体传输系统 组播 流量控制 RTP/multicast 系统设计
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WDM全光网络中Multicast的寻径与波长分配算法 被引量:4
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作者 黄传河 陈莘萌 贾小华 《计算机工程与应用》 CSCD 北大核心 2002年第15期153-156,163,共5页
在WDM全光网络中实现实时Multicast功能是计算机网络的应用要求,也是现代计算机网络的重要特征。该文提出了一种在WDM全光网络中实现实时Multicast的算法。该算法以辅助的波长图为基础,将寻径与波长分配统一进行,构造满足延迟约束的、... 在WDM全光网络中实现实时Multicast功能是计算机网络的应用要求,也是现代计算机网络的重要特征。该文提出了一种在WDM全光网络中实现实时Multicast的算法。该算法以辅助的波长图为基础,将寻径与波长分配统一进行,构造满足延迟约束的、具有较低成本的Multicast树,实现Multicast功能。 展开更多
关键词 WDM 全光网络 multicast 寻径 波长分配算法 STEINER树 计算机网络 波长寻径网络
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满足QoS约束的加速加权分布式动态Multicast算法 被引量:4
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作者 黄传河 陈莘萌 贾小华 《计算机研究与发展》 EI CSCD 北大核心 2002年第4期482-487,共6页
在计算机网络中高效实现具有延迟等QoS约束的Multicast功能,是计算机网络应该提供的一种基本功能,是保证视频会议系统、多媒体教学系统、视频点播系统(VOD)、网上拍卖等应用得以实现的基础.针对这一问题,提出了一... 在计算机网络中高效实现具有延迟等QoS约束的Multicast功能,是计算机网络应该提供的一种基本功能,是保证视频会议系统、多媒体教学系统、视频点播系统(VOD)、网上拍卖等应用得以实现的基础.针对这一问题,提出了一种加速加权方法,根据已经经过的部分路径的延迟和剩余延迟,将成本加速加权,利用加权成本构造Multicast树.利用该算法,可以在计算机网络中以分布式方式建立接近最小成本、满足延迟约束条件、适于实时通信的动态Multicast连接,避免了传统方法将成本和延迟分别考虑、大量回溯的弊端. 展开更多
关键词 QOS约束 加权 动态multicast算法 计算机网络 分布式算法
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适用于分布式虚拟环境的MULTICAST通信协议设计与分析 被引量:6
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作者 杨永高 潘启敬 《小型微型计算机系统》 CSCD 北大核心 1999年第3期171-175,共5页
本文主要讨论了分布式虚拟环境(DVE)的通信特点及其对网络通信协议的要求,提出了一个基于Multicast分组(MG)的通信思想,据此设计实现了一个适用于DVE系统的通信协议(基于发送方的分组Multicast通信协... 本文主要讨论了分布式虚拟环境(DVE)的通信特点及其对网络通信协议的要求,提出了一个基于Multicast分组(MG)的通信思想,据此设计实现了一个适用于DVE系统的通信协议(基于发送方的分组Multicast通信协议--SIGMP).最后论文对Multicast通信和SIGMP协议进行了详细的性能分析和讨论,推导出了对Multicast通信进行性能分析的一般方法. 展开更多
关键词 分布式虚拟环境 计算机网络 multicast 通信协议
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Programming Technology of IP Multicast and Broadcast Based on Socket 被引量:2
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作者 李冬霞 苏广川 沈瑛 《Journal of Beijing Institute of Technology》 EI CAS 2001年第3期316-321,共6页
Beginning with the simple introduction of socket which is the most commonly used application program interfaces in UNIX/LINUX communication domain, the concrete programming procedures to realize multicast and broadcas... Beginning with the simple introduction of socket which is the most commonly used application program interfaces in UNIX/LINUX communication domain, the concrete programming procedures to realize multicast and broadcast based on socket is provided, according to TCP/IP protocol in LINUX system. The acquiring and converting of broadcast destination address and multicast address, the setting of multicast options, the joining in and withdrawing from the multicast group, and the receiving and sending of datagram are all demonstrated in it, the related system calls and simple explication of C programming are also included. 展开更多
关键词 SOCKET multicast BROADCAST LINUX
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多级互连网络中的multicast通信 被引量:3
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作者 王晓东 周兴铭 《计算机研究与发展》 EI CSCD 北大核心 1998年第1期40-44,共5页
MPP系统中的并行通信是目前并行处理研究的热点,改善并行通信性能、提高网络吞吐率是促进MPP性能发挥的关键问题.multicast通信是区别于点到点通信的一对多通信方式,因而功能更强大,使用起来更灵活方便,在并行处理... MPP系统中的并行通信是目前并行处理研究的热点,改善并行通信性能、提高网络吞吐率是促进MPP性能发挥的关键问题.multicast通信是区别于点到点通信的一对多通信方式,因而功能更强大,使用起来更灵活方便,在并行处理中应用十分广泛.文中以基于开关元件实现结点间动态互连的多级互连网络为背景,研究了multicast通信路由算法的效率.针对现有路由算法的不足,提出了基于功能扩展的交换开关的SBMT路由算法,并进一步作出了性能分析和比较. 展开更多
关键词 多级互连网络 multicast通信 并行处理
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面向ICN组播的基于感染力的汇聚点部署方法
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作者 田震宇 尤佳莉 朱小勇 《网络新媒体技术》 2024年第1期21-28,共8页
在组播系统中,汇聚点(RP)作为组播树的根节点,负责将源内容引入组播树。RP汇集了网络中的流量,容易成为网络性能瓶颈。为了提高网络容纳的组播组数量(组播容量),可以将更多的网络节点升级为RP。相比于传统的IP组播,信息中心网络(ICN)组... 在组播系统中,汇聚点(RP)作为组播树的根节点,负责将源内容引入组播树。RP汇集了网络中的流量,容易成为网络性能瓶颈。为了提高网络容纳的组播组数量(组播容量),可以将更多的网络节点升级为RP。相比于传统的IP组播,信息中心网络(ICN)组播大幅降低了RP管理代价,从而允许部署大量RP。因此,本文基于ICN组播展开研究。但是,由于设备升级成本和系统稳定性等原因,ICN组播中RP数量仍然不能太多。现有基于P中值模型法的RP部署方法没有充分考虑到RP之间的负载压力,容易导致RP计算资源浪费和一些RP的负载过重,限制了组播容量。因此,本文提出了一种面向ICN组播的基于感染力的RP部署方法。该方法首先提出了一种组播感染力指标,用于刻画RP之间的负载压力。其次,利用组播感染力,提出了一种基于贪心策略的RP部署方法,优先将负载压力小的节点升级为RP。2组实验证明,在部署15个RP的情况下,本方法相比P中值模型法,将组播容量提高3.48倍;在组播容量都达到9000组时,本方法所需的RP数量仅为p中值模型法的29.4%。 展开更多
关键词 组播 汇聚点 部署 组播容量 感染力
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A distributed on-demand bandwidth-constrained multicast routing protocol for wireless ad hoc networks 被引量:1
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作者 余燕平 倪玲玲 郑元琰 《Journal of Southeast University(English Edition)》 EI CAS 2015年第1期5-11,共7页
To meet the bandwidth requirement for the multicasting data flow in ad hoc networks, a distributed on- demand bandwidth-constrained multicast routing (BCMR) protocol for wireless ad hoc networks is proposed. With th... To meet the bandwidth requirement for the multicasting data flow in ad hoc networks, a distributed on- demand bandwidth-constrained multicast routing (BCMR) protocol for wireless ad hoc networks is proposed. With this protocol, the resource reservation table of each node will record the bandwidth requirements of data flows, which access itself, its neighbor nodes and hidden nodes, and every node calculates the remaining available bandwidth by deducting the bandwidth reserved in the resource reservation table from the total available bandwidth of the node. Moreover, the BCMR searches in a distributed manner for the paths with the shortest delay conditioned by the bandwidth constraint. Simulation results demonstrate the good performance of BCMR in terms of packet delivery reliability and the delay. BCMR can meet the requirements of real time communication and can be used in the multicast applications with low mobility in wireless ad hoc networks. 展开更多
关键词 wireless ad hoc networks multicast routing bandwidth satisfaction on-demand multicast routing distributed multicast routing QoS multicast routing
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IP MultiCast技术在远程教学系统中的应用 被引量:1
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作者 林毅 方路平 曾燕 《计算机应用》 CSCD 北大核心 2001年第z1期50-51,共2页
介绍了一种先进的远程教学系统及系统所实现的各部分功能 ,着重介绍了IPMultiCast技术以及这种技术在音频 。
关键词 IP multicast 远程教学 WINDOWS Sockets编程
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FEC编码在可靠Multicast中的应用分析 被引量:3
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作者 朱晓刚 杨传厚 《上海交通大学学报》 EI CAS CSCD 北大核心 1999年第5期549-552,共4页
在Internet差错恢复技术及前向纠错(FEC)编码的基础上,分析了可靠组播(Multicast)应用中采用FEC进行差错恢复的性能,并提出一种基于FEC的自适应可靠Multicast协议.结果表明,在通常的网络环... 在Internet差错恢复技术及前向纠错(FEC)编码的基础上,分析了可靠组播(Multicast)应用中采用FEC进行差错恢复的性能,并提出一种基于FEC的自适应可靠Multicast协议.结果表明,在通常的网络环境中,采用结合FEC编码的混合ARQ差错恢复方式,能够降低可靠Multicast通信的平均分组传送次数,减小分组重传时间,从而提高数据吞吐量,而且在通信过程中根据网络状况动态地改变预发送纠错分组数。 展开更多
关键词 前向纠错编码 组播 INTERNET 差错恢复 可靠性
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