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中文摘要：
由于卫星通信具有带宽有限、时延受限、信道误码率高等特点，因而设计星上交换结构时必须尽可能降低交换时延，减少内部阻塞。同时，组播业务的广泛应用使得星上交换需要具备单组播并行处理能力。为此，提出一种基于蚁群算法的星上异步传输方式（ATM）单组播并行交换结构，并对此方案进行了分析和仿真。结果表明，该结构由于采用了蚁群算法和阻塞规避方案，实现了单组播并行处理，并有效改善了信元时延和信元丢失率等性能。
英文摘要：
Satellite communication network is a bandwidth-limited, delay-bounded and high Bit-Error-Rate system, so onboard switching fabric should be improved in order to reduce cell average delay and avoid blocking. At the same time,onboard switching fabric should be able to support both unicast and multicast, because of the development of the multicast in satellite communication. An onboard ATM unicast and muhicast switching fabric based on ant colony optimization are presented, which can support unicast and multicast switching, and reduce cell average delay and cell loss probability effectively by using ant algorithm and the blocking avoidance method.
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