Adaptive Channel Bonding in Multicarrier Wireless Networks
To support high data rate applications such as video conferencing and multimedia streaming, the ongoing standardization of the next generation Wi-Fi increases the channel bonding. However, inefficiency and unfairness issues arise when devices that use different channel widths coexist in a contention domain. Instead of increasing channel width, an alternative is to use multiple narrow channels independently. Although the use of narrow channels addresses the inefficiency, the complexity of a compound radio design hinders the adoption of the method in consideration of implementation cost.
Description of Technology
This technology is a dynamic channel bonding protocol in which a node is allowed to start a transmission as long as a narrow channel is available and gradually increase channel width during transmission whenever a new narrow channel becomes available. This method aggregates all available narrow channels as one wide channel, removing the need of setting guard bands between contiguous narrow channels. A challenge in dynamic channel bonding is the communication over uncertain channels. To enable fast spectrum agreement between transmitter and receiver, a partial spectrum correlation method is implemented. When new channels become available, multiple nodes may contend for them. A compound preamble is designed to make collisions detectable in the frequency domain and a parallel bitwise arbitration mechanism is used to quickly resolve the collisions in the time domain.
- Increased data transmission efficiency
Pei Huang, Xi Yang, Li Xiao
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Michigan State University