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

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.

Dynamic resource reservation algorithm for core network video business with bandwidth reduction based on time slot

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.