A clean slate 4D approach to network control and management
ACM SIGCOMM Computer Communication Review
SODA: A Low-power Architecture For Software Radio
Proceedings of the 33rd annual international symposium on Computer Architecture
The Design and Implementation of WiMAX Base Station MAC Based on Intel Network Processor
ICESSSYMPOSIA '08 Proceedings of the 2008 International Conference on Embedded Software and Systems Symposia
Proceedings of the 14th ACM SIGPLAN symposium on Principles and practice of parallel programming
Sora: high performance software radio using general purpose multi-core processors
NSDI'09 Proceedings of the 6th USENIX symposium on Networked systems design and implementation
Handling OS jitter on multicore multithreaded systems
IPDPS '09 Proceedings of the 2009 IEEE International Symposium on Parallel&Distributed Processing
Unlocking wireless performance with co-operation in co-located base station pools
COMSNETS'10 Proceedings of the 2nd international conference on COMmunication systems and NETworks
Wireless network cloud: architecture and system requirements
IBM Journal of Research and Development
Tesseract: a 4D network control plane
NSDI'07 Proceedings of the 4th USENIX conference on Networked systems design & implementation
ML estimation of time and frequency offset in OFDM systems
IEEE Transactions on Signal Processing
Distributed wireless communication system: a new architecture for future public wireless access
IEEE Communications Magazine
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The mobile Internet has seen tremendous progress due to the standardization efforts around WiMAX, LTE and beyond. There are also early trends towards adoption of software radio and a growing presence of general purpose platforms in wireless networking. Such platforms are programmer-friendly and with recent advances on multi-core and hybrid architectures, allow signal processing, network processor class packet processing, wire-speed computation and server-class virtualization capabilities for software radio realizations of 3G and 4G wireless stacks. Software radio over IT platforms will enable the virtualization of base stations and consolidation of virtual base stations into central pools (a local "cloud site") with fiber connectivity to towers, which we call a Wireless Network Cloud (WNC). A Virtual base station (BS) pool supporting multiple BS software instances over a general OS and IT platform is an important step towards the realization of the larger WNC concept. This paper introduces the first TDD WiMAX SDR BS implemented on a commodity server, in conjunction with a novel design of a remote radio head (RRH). We also present the first working prototype of a virtual BS (VBS) pool, exploring the systems challenges in supporting a VBS pool on multi-core IT platforms. The results from our VBS pool prototype for WiMAX verify that these solutions can meet system requirements including synchronization, latency and jitter.