CAJ | 학술논문

DVB-RCS系统的带宽资源受限于卫星载荷和星上环境，对星上带宽资源的管理通常采用动态带宽分配的方式。本文设计了一种基于非线性规划的跨层动态带宽分配算法，在带宽分配算法中引入跨层设计思想，综合考虑应用层用户服务质量和物理层编码调制方式的影响，构造新的效用函数，并利用非线性规划进行求解。仿真结果表明，与经典分配算法相比，该算法在系统吞吐量、公平性和用户满意度上都有所提升，同时降低带宽分配过程中的计算复杂度，适合用户数量快速增加的卫星通信系统。
DVB-RCS계통적대관자원수한우위성재하화성상배경，대성상대관자원적관리통상채용동태대관분배적방식。본문설계료일충기우비선성규화적과층동태대관분배산법，재대관분배산법중인입과층설계사상，종합고필응용층용호복무질량화물리층편마조제방식적영향，구조신적효용함수，병이용비선성규화진행구해。방진결과표명，여경전분배산법상비，해산법재계통탄토량、공평성화용호만의도상도유소제승，동시강저대관분배과정중적계산복잡도，괄합용호수량쾌속증가적위성통신계통。
Bandwidth resource in DVB-RCS system is limited by the satellite loads and space environment. DBA is a common way to assign bandwidth in satellite. A cross-layer DBA algorithm based on nonlinear programming is pro-posed in this paper which involves cross-layer method. Comprehensively considering user QoS from application layer and coding and modulation mode from physical layer, a new utility function is built with a solution of nonlinear pro-gramming. According to the simulation result, the algorithm performs better in system throughput, fairness and degree of user satisfaction, comparing with novel allocation. The algorithm has a simplified computation method which is use-ful for satellite systems with an increasing in user numbers.