1. Breakout Group 1 Summary NSF workshop on Bridging the Gap between Wireless Networking Technologies at the Physical Layer Aug. 27-28

2. Additional Issues Raised Heterogeneity of devices and networks Co-existence in same bands. Co-existence in same bands. Common control channel? Common control channel? Device processing constraints How to include in optimization models? How to include in optimization models? Incorporate “overhead” into optimization metrics Limited feedback, convergence of algorithms, etc. Limited feedback, convergence of algorithms, etc. Interference management Need better theory and understanding of role in networks. Need better theory and understanding of role in networks. Relation between different PHY-layer abstractions E.g. Performance/complexity trade-offs E.g. Performance/complexity trade-offs Wireless security Multiple dimensions: Jamming, information hiding, anonymity, etc. Multiple dimensions: Jamming, information hiding, anonymity, etc. Phy-layer approaches Phy-layer approaches

3. Some broader issues Wireless networks are not just the Internet with different PHY-layer. Lack of many “rich” and relevant theoretical sub-problems that community can focus on. E.g. Backpressure. E.g. Backpressure. Need to avoid disconnect of theory and applications. Ensure work stays relevant. Ensure work stays relevant. Application-motivated networks (e.g. sensor networks) Application-motivated networks (e.g. sensor networks) What future resources will be scarce? Spectrum, energy, processing… Spectrum, energy, processing… Need to build a stronger “wireless networking” community. Covers broad areas represented here Covers broad areas represented here Common language, culture Common language, culture

4. Action items New broad-based (interdisciplinary) NSF program on wireless networking. Include rich agenda of PHY-to-application work. Include rich agenda of PHY-to-application work. Cellular research model vs. ad hoc model. Cellular research model vs. ad hoc model. DOD spending a lot in this area, but not sufficiently addressing fundamentals. DOD spending a lot in this area, but not sufficiently addressing fundamentals. Can help strengthen community. Can help strengthen community. Allow larger interdisciplinary projects. Allow larger interdisciplinary projects. But not at exclusion of small (single PI) projects. “Grand challenges”? “Grand challenges”? More on-going workshops like this to encourage broad discussions.