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浙江大学学报(工学版)  2020, Vol. 54 Issue (9): 1746-1752    DOI: 10.3785/j.issn.1008-973X.2020.09.010
计算机技术     
基于时间槽的可降带宽核心网视频业务动态资源预约算法
成海秀,李冠霖,张凌*()
华南理工大学 广东省计算机网络重点实验室,计算机科学与工程学院,广东 广州 510641
Dynamic resource reservation algorithm for core network video business with bandwidth reduction based on time slot
Hai-xiu CHENG,Guan-lin LI,Ling ZHANG*()
Guangdong Province Key Laboratory of Computer Network, School of Computer Science and Engineering, South China University of Technology, Guangzhou 510641, China
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摘要:

为了解决未来核心网络中大容量、低延时视频业务的服务质量保证问题,以视频会议业务为例,在基于软件定义网络的核心网络框架下,将视频会议请求解析为多个资源请求,以时间槽为单位进行带宽资源的提前预约,提出一种可降带宽的资源预约算法. 在进行动态资源预约时,若发现在某个时间比例内链路不满足视频业务带宽需要,则采用降带宽的方式进行处理,以避免视频业务在某个较短时间段内因带宽不满足需求而导致预约失败. 仿真实验结果表明:相比不采用降带宽的动态资源算法,该算法能够有效提高视频业务资源预约的成功率,参会方个数越多,时间槽越小,成功率的提升越大.

关键词: 核心网视频业务服务质量(QoS)时间槽可降带宽动态资源预约算法    
Abstract:

Taking video conference service as an example, a resource reservation algorithm that could reduce bandwidth was proposed, in order to solve the problem of service quality assurance for large-capacity and low-latency video services in the core network in the future. The video conference requests were resolved into multiple resource requests, and then the bandwidth resource was reserved in advance in units of time slots, under the core network architecture based on software defined network. When making bandwidth reservation, if it was found that the link did not meet the bandwidth requirements of the video service within a certain time scale, the bandwidth reduction method would be adopted to avoid the reservation failure problem caused by the insufficient bandwidth demand in a short period of time. The simulation experimental results show that, compared with the dynamic resource algorithm without bandwidth reduction, this algorithm can effectively improve the success rate of video service resource reservations; the greater the number of participants and the smaller the time slot, the greater the improvement of the success rate will be.

Key words: core network    quality of service (QoS) for video business    time slot    bandwidth reduction    dynamic resource reservation algorithm
收稿日期: 2019-09-25 出版日期: 2020-09-22
CLC:  TP 393  
基金资助: 广东省计算机网络重点实验室开发基金资助项目(CCNL201906)
通讯作者: 张凌     E-mail: ling@scut.edu.cn
作者简介: 成海秀(1984—),女,讲师,博士生,从事高速视频网络QoS研究. orcid.org/0000-0002-2856-9851. E-mail: cshx.cheng@mail.scut.edu.cn
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引用本文:

成海秀,李冠霖,张凌. 基于时间槽的可降带宽核心网视频业务动态资源预约算法[J]. 浙江大学学报(工学版), 2020, 54(9): 1746-1752.

Hai-xiu CHENG,Guan-lin LI,Ling ZHANG. Dynamic resource reservation algorithm for core network video business with bandwidth reduction based on time slot. Journal of ZheJiang University (Engineering Science), 2020, 54(9): 1746-1752.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2020.09.010        http://www.zjujournals.com/eng/CN/Y2020/V54/I9/1746

图 1  基于软件定义网络(SDN)的企业级视频会议服务质量(QoS)管理系统架构图
图 2  会议起止时间与时间槽的关系
图 3  某高校的校园网拓扑图
图 4  图4时间槽大小不同时多方会议资源解析时间对比
图 5  时间槽大小不同时算法平均资源预约时间的对比
图 6  不同时间槽大小对不同资源预约算法成功率的影响
图 7  时间槽大小不同时可降带宽动态资源预约算法成功率的增长趋势
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