Abstract:
To overcome the lack of strict QoS guarantees in existing hotspots, in this paper we present a system for realtime traffic support in 802.11 networks that works in either...Show MoreMetadata
Abstract:
To overcome the lack of strict QoS guarantees in existing hotspots, in this paper we present a system for realtime traffic support in 802.11 networks that works in either infrastructure or ad-hoc mode. The proposed mechanism, called elastic MAC (E-MAC) protocol, helps stations with real-time traffic to organize and establish a transmission schedule in a distributed manner, while coexisting with standard 802.11 stations. This distributed scheduling guarantees very short delays and a minimum reserved data rate for real-time stations, while protecting best-effort 802.11 traffic from starvation. Another feature of our mechanism is time-slot reuse, which improves the network efficiency by allowing other real-time stations to take over unused slots (e.g., in case of using voice codecs with silence suppression). We evaluate the performance of our system using a testbed implementation, ns-2 simulations and a mathematical model, and show how it outperforms other QoS schemes (e.g., 802.11e) in terms of throughput, delay, and jitter.
Date of Conference: 08-11 October 2007
Date Added to IEEE Xplore: 14 January 2008
ISBN Information:
ISSN Information:
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Data Rate ,
- Service Quality ,
- Distributed Manner ,
- Ad Hoc Networks ,
- Transmission Scheduling ,
- Collision ,
- Wireless Networks ,
- Time Slot ,
- Mathematical Analysis ,
- Transmission Time ,
- Data Packets ,
- Average Delay ,
- Minimum Data ,
- Current Frame ,
- Collision Probability ,
- Idle Time ,
- End Of Round ,
- Packet Size ,
- Admission Control ,
- Total Throughput ,
- Time Division Multiple Access ,
- Packet Length ,
- Real-time Transmission ,
- Backward Compatibility ,
- Data Rate Requirements ,
- Variable Length ,
- Buffer Size ,
- Channel Capacity ,
- Low Delay ,
- Synchronization
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Data Rate ,
- Service Quality ,
- Distributed Manner ,
- Ad Hoc Networks ,
- Transmission Scheduling ,
- Collision ,
- Wireless Networks ,
- Time Slot ,
- Mathematical Analysis ,
- Transmission Time ,
- Data Packets ,
- Average Delay ,
- Minimum Data ,
- Current Frame ,
- Collision Probability ,
- Idle Time ,
- End Of Round ,
- Packet Size ,
- Admission Control ,
- Total Throughput ,
- Time Division Multiple Access ,
- Packet Length ,
- Real-time Transmission ,
- Backward Compatibility ,
- Data Rate Requirements ,
- Variable Length ,
- Buffer Size ,
- Channel Capacity ,
- Low Delay ,
- Synchronization