Schewick, “New Design Principles for the Internet

Abstract-Socio-economic aspects are not intrinsic to the current Internet architecture. Today's architecture is becoming stressed as stakeholders introduce "hacks" to try to impose their economic desires on others, leading to a "tussle" of conflicting interests. In this paper, we propose new Internet design principles that are "designed for tussle". We believe that Internet protocols and architecture that follow them will naturally integrate both technical and socio-economic aspects, and so will be able to smoothly adapt to changes in society's demands on the Internet as they occur, without requiring permanent redesign

A real time cognitive radio testbed for physical and link layer experiments

Abstract — Cognitive Radios have been advanced as a technology for the opportunistic use of under-utilized spectrum. Cognitive Radio are able to sense the spectrum and detect the presence of Primary Users. However, Primary Users of the spectrum are skeptical about the robustness of this sensing process and have raised concerns with regards to interference from Cognitive Radios. Furthermore, while a number of techniques have been advanced to aid the sensing process, none of these techniques have been verified in a practical system. To alleviate these concerns, a real time testbed is required, which can aid the comparison of these techniques and enable the measurement and evaluation of key interference and performance metrics. In this paper we present such a testbed, which is based on the BEE2, a multi-FPGA emulation engine. The BEE2 can connect to 18 radio front-ends, which can be configured as Primary or Secondary Users. Inherent parallelism of the FPGAs allows the simultaneous operation of multiple radios, which can communicate and exchange information via high speed low latency links. I

A Real Time Cognitive Radio Testbed for Physical and Network Level Experiments

Cognitive Radios have been advanced as a technology for the opportunistic use of under-utilized spectrum. However, Primary users of the spectrum have raised concerns with regards to interference from Cognitive Radios. On the other hand, a variety of techniques have been proposed for reliable sensing and non-interfering use of the spectrum which have yet to be validated in an actual system. In this paper we present a testbed that will allow us to experiment with sensing algorithms and to demonstrate a working prototype of an indoor cognitive radio network. The testbed is based on the BEE2, a multi-FPGA emulation engine which is capable of connecting to 18 radio front-ends. The testbed will be used to experiment with various baseband sensing algorithms and cooperative sensing schemes