-IEEE 802.16 and Passive Optical Network (PON) are two promising broadband access technologies for high-capacity wireless and wired access networks, respectively. In order to better understand the co-existence of both network technologies and to determine whether closer cooperation in the bandwidth provisioning process is advantageous, an access network that utilizes a Gigabit PON (GPON) to backhaul 802.16 network traffic is evaluated. Typical to many network deployments, the equipment is from different manufacturers and has different management and control interfaces. This paper proposes the use of a control bridge that overlooks the operations of both the GPON and 802.16 networks in order to: 1) provide dynamic QoS mapping so as to reduce traffic delivery cost; and 2) to improve overall channel utilization through coordinated dynamic bandwidth allocation. The performance of the converged network under the control of the proposed control bridge is evaluated in terms of cost of data delivery, channel utilization, and service differentiation. Keywords -converged networks, IEEE 802.16 networks, GigabitPassive Optical Network (GPON), fixed-mobile convergence (FMC), control bridge, quality of service (QoS).

Abstract-A measurement study was conducted of video streaming across a testbed with routers typical of those found at bottlenecks on the wired Internet. During 'bursty' traffic packet loss was not always fairly distributed between background flows and a video stream. The paper shows that packet-by-packet end-to-end delay, an alternative metric, has the ability to closely track queuing delay, responding to available bandwidth in a timely manner. A wider issue considered by the paper is to what extent one-way delay across a network path that includes bottleneck links can act to detect congestion.

The current status of a campus research testbed that is being constructed to allow for the exploration of digital service delivery and smart networked environments using different networking technologies is presented.

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