The packet reservation multiple access with hindering state (PRMA-HS) is a protocol suitable for LEO satellite mobile communication. Although working well with light system payload (amount of user terminals), the protocol imposes high channel congestion on system with heavy payload, thus degrades the system’s quality of service. To controlling the channel congestion, a scheme of enhanced PRMA-HS protocol is proposed, which aims to reduce the collision of voice packets by adopting a mechanism of access control. Through theoretic analysis, the system’s mathematic model is presented and the packet drop probability of the scheme is deduced. To testify the performance of the scheme, a simulation is performed and the results support our analysis.
展开▼
机译：Chinese Aesthetics and Performance Practice in Three Works for Piano by Chen Yi: Tunes from My Home, Northern Scenes, and Four Spirits =浅析陈怡含有钢琴的作品中涉及到中国艺术美学及演出实践的三首作品：钢琴三重奏《家乡的歌》，钢琴独奏《北方景色》，钢琴协奏曲《四灵》
