Quantum Limits of Far-Field Beam Pointing Accuracy in Space

Jili, 吴继礼 Wu; Shanghong, 赵尚弘 Zhao; Yongjun, 李勇军 Li; Xingchun, 楚兴春 Chu; Qin, 李琴 Li; Zhu, Zihang; Lei, 石磊 Shi

doi:10.3788/aos201131.0106004

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“…间。除此之外， FDU 的再生光信号功能也可为长距离传输提供色散补偿 [14][15] 。卫星间相距遥远，星间链路存在周期性中断 [16] ，且光信号经过长距离传输之后会有较大的衰减 [17][18] [19] ，这些优点正好符合星上交换系统的现实需要。综合这两种节点的结构和星载交换系统复…”

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Research of On-Board Satellite Optical Switching Resource Reservation Protocol based on E-OBS Architecture

Ruixin¹,

Shanghong²,

Meng³

et al. 2015

激光与光电子学进展

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To meet the requirements of satellite laser switching network, such as fine robustness and high physical realizability, emulated-optical burst switching (OBS) is selected as the architecture of relay satellite, and an on-board resource reservation protocol, whose offset time is constant, is proposed combining the ground resource reservation methods. Traffic prediction is used to differentiate the data burst into single burst or burst stream according to the destination and quality of service (QoS), then resource reservation is accomplished successfully. To validate it, mathematic models of mean end-end delay, throughput, link utility and burst loss probability are established. The results of analysis and emulation show that the protocol can reduce the reconfiguration time and switching time of optical switch matrix through burst stream scheme, and decrease the complexity and cache size requirement through the E-OBS architecture, so the new resource reservation protocol meets the requirements of satellite laser communication.

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