Policy-Based BW Allocation for 802.16e WiMax Networks.

摘要

Fourth generation (4G) wireless networks based on Mobile WiMax (802.16e) are data-optimized networks with dynamic bandwidth (BW) allocation (BA) capabilities. The sharing of BW between the users and their applications is one of the most significant problems to an operator who needs to maximize revenue while also maintaining suitable quality-of-service (QoS). However, of importance to vendors is the ability to make such BW sharing decisions in a timely manner. This thesis proposes a joint connection admission control (CAC) and BA algorithm specifically designed for 802.16e that achieves a balance between revenue maximization, QoS and algorithmic complexity. In the 802.16e standards, this algorithm is a specific realization of the service flow management (SFM) and service flow authorization (SFA) functions. This CAC/BA algorithm considers the effect of possible BW allocations on QoS contracts and revenue as well as considering degradation of suitable connections that may yield a net revenue gain. Analytical and simulation techniques are used to evaluate algorithm performance (e.g. success rate, compute time), showing large improvements in revenue and compute efficiency while maintaining sufficient QoS.