QoS Provisioning Of Broadband Residential Ethernet-Based Access Network

Nowadays, the broadband residential access infrastructure remains one of the major research areas for the Next Generation Network (NGN) and also one of the major obstacles for implementation of a broadband network. Asymmetrical Digital Subscriber Loop (ADSL), Hybrid Fiber-Coax (HFC) based on ATM technique grabbed the main market share currently. Over the past decade, however, Internet Protocol (IP) has emerged as the undisputed protocol of choice at the network layer. IP is the one constant element in a network of diverse transport protocols, ranging from ATM and SONET to Ethernet, DOCSIS cable, Passive Optical Network (PON) and DSL. Nowadays, academic communities and industry from all over the world are increasingly showing great concern about a new broadband residential IP-based access technique, i.e. Ethernet technique in the subscriber access network or the broadband residential Ethernet-based access network. Indeed, Ethernet in the subscriber access network will offer several advantages over traditional first mile technologies in terms of cost, network simplicity, packet-based efficiency, bandwidth, scaling, and provisioning. It can easily meet the requirements of bandwidth of the residential customers, and promises a converged network. There are some broadband residential Ethernet-based access networks currently, but they only offer high-speed Internet access and VoD, not TV and VoIP. However, the carrier-grade broadband residential Ethernet-based access network, a converged residential access network which offer voice, TV, VoD and high-speed Internet access for residential customers, still needs to overcome many technical difficulties. Specially, multi-service QoS provisioning is a key technique of the broadband residential Ethernet access network, but there is short of the pragmatic good methods. This dissertation tries to find a scalable method to implement OoS provisioning of the broadband residential Ethernet-based access network.This paper presented a method of OoS provisioning in the broadband residential Ethernet-based access network. The contributions of this dissertationlists below:1. Proposed that DiffServ defined by RFC 2475 is implemented in layer two (L2) domain over Ethernet, and L2 domain over Ethernet provides EF services and AF services. Our differentiated service approach of L2 domain over Ethernet based on IEEE 802.1P and 802.1Q. The approach combines hop-by-hop selective backpressure scheme with HOL protection to eliminate congestion and improve performance of switched Ethernet L2 domains instead of Random Early Drop (RED) scheme or its variants considering the characteristics of Ethernet technique. Noted, our differentiated service approach of L2 domain over Ethernet doesn't change the key features of Ethernet technique, and promises a same QoS architecture, i.e. DiffServ, in the whole broadband residential Ethernet-based access network.2. Presented a scalable method of QoS provisioning in the broadband residential Ethernet-based access network that offers QoS guarantees for VoIP, TV, VoD, etc. The CBR encoding control scheme with fixed services promises predictable traffic characteristics, which simplifies QoS mechanisms and network designs; the differentiated approach promises a scalable QoS architecture for the carrier-grade broadband residential access network; combining network dimensioning, DiffServ and pricing promises QoS provisioning with effectiveness and operability. Details of research work listed: I. Presented a method of network dimensioning in the broadband residential Ethernet-based access network. This method of network dimensioning can appropriately estimate the requirements of bandwidth for the services, and allot the appropriate bandwidth for the links and prevent the networks from operating with overburden always; II. Presented a differentiated approach of the broadband residential Ethernet-based access network. Analyzed Per Hop Behavior and Per Domain Behavior of EF service based on Packet Scale Rate Guarantee theo...