| adaptive voice stream multicast over low-power wireless networks | |
| Liqun Li; Guoliang Xing; Qi Han; Limin Sun | |
| 2010 | |
| 会议名称 | 31st IEEE Real-Time Systems Symposium, RTSS 2010 |
| 会议录名称 | Proceedings - Real-Time Systems Symposium |
| 页码 | 292-301 |
| 会议日期 | 40850 |
| 会议地点 | San Diego, CA |
| 出版地 | United States |
| ISSN | 10528725 |
| ISBN | 978-0-7695-4298-0 |
| 部门归属 | Inst. of Software, Chinese Acad. of Sci., Beijing, China |
| 摘要 | Low-power Wireless Networks (LWNs) have become increasingly available for mission-critical applications such as security surveillance and disaster response. In particular, emerging low-power wireless audio platforms provide an economical solution for ad hoc voice communication in emergency scenarios. In this paper, we develop a system called Adaptive Stream Multicast (ASM) for voice communication over multi-hop LWNs. ASM is composed of several novel components specially designed to deliver robust voice quality for multiple sinks in dynamic environments: 1) an empirical model to automatically evaluate the voice quality perceived at sinks based on current network condition, 2) a feedback-based Forward Error Correction scheme where the source can adapt its coding redundancy ratio dynamically in response to the voice quality variation at sinks, 3) a Tree-based Opportunistic Routing (TOR) protocol that fully exploits the broadcast opportunities on a tree based on novel forwarder selection and coordination rules, and 4) a distributed admission control algorithm that ensures the voice quality guarantees when admitting new voice streams. ASM has been implemented on a low-power hardware platform and extensively evaluated through experiments on a testbed of 18 nodes. |
| 关键词 | Ad Hoc Voice Communication Adaptive Voice Stream Multicast Coding Redundancy Ratio Coordination Rules Disaster Response Distributed Admission Control Algorithm Forward Error Correction Forwarder Selection Low-power Wireless Networks Security Surveillance Tree-based Opportunistic Routing Protocol Voice Quality Ad Hoc Networks Audio Streaming Forward Error Correction Multicast Communication Routing Protocols Telecommunication Congestion Control Voice Communication |
| 主办者 | IEEE Comput. Soc. Tech. Comm. Real-Time Syst. |
| 语种 | 英语 |
| 内容类型 | 会议论文 |
| URI标识 | http://ir.iscas.ac.cn/handle/311060/8644 |
| 专题 | 信息安全国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Liqun Li,Guoliang Xing,Qi Han,et al. adaptive voice stream multicast over low-power wireless networks[C]. United States,2010:292-301. |
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