ACCESSNETS 2009 -- Hybrid Dynamic Bandwidth and Wavelength Allocation Algorithm to Support Multi-Service Level Profiles in a WDM-EPON -- Utility Max-Min Fair Resource Allocation for Diversified Applications in EPON -- Fairness Enhancement for 802.11 MAC -- SWIM: A Scheduler for Unsolicited Grant Service (UGS) in IEEE 802.16e Mobile WiMAX Networks -- Influence of Technical Improvements on the Business Case for a Mobile WiMAX Network -- Optimizing Energy and Modulation Selection in Multi-Resolution Modulation For Wireless Video Broadcast/Multicast -- System Evaluation of PMI Feedback Schemes for MU-MIMO Pairing -- On Mitigating Packet Reordering in FiWi Networks -- Adaptive BU Association and Resource Allocation in Integrated PON-WiMAX Networks -- A Future Access Network Architecture for Providing Personalized Context-Aware Services with Sensors -- How to Optimally Schedule Cooperative Spectrum Sensing in Cognitive Radio Networks -- Efficient Spectrum Sharing in Cognitive Radio Networks with Implicit Power Control -- Dynamic Spectrum Sharing in Cognitive Radio Femtocell Networks -- Cross-Layer Routing Method for the SCTP with Multihoming MIPv6 -- Challenges and Solutions in Vectored DSL -- IWATA Workshop -- Analysis and Suppression of MAI in WiMAX Uplink Communication System with Multiple CFOs -- Capacity of Two-Way Relay Channel -- DP Matching Approach for Streaming Contents Detection Using Traffic Pattern -- A Linear Precoding Design for Multi-Antenna Multicast Broadcast Services with Limited Feedback -- Quantized Beamforming Technique for LTE-Advanced Uplink.

This book constitutes the thoroughly refereed post-conference proceedings of the Fourth International Conference on Access Networks, AccessNets 2009, held in Hong Kong, China, in November 2009. The 11 revised full papers presented together with 8 invited papers were carefully reviewed and selected. The papers present original and fundamental research advances in the area of access networks, such as hybrid dynamic bandwidth and wavelength allocation algorithm, diversified applications in EPON, unsolicited grant services (UGS), mobile WiMAX network, FiWi networks, integrated PON-WiMAX networks, cognitive radio networks, efficient and dynamic spectrum sharing, cross-layer routing method for SCTP, and vectored DSL.