For future 5G core networks, Service Based Architecture (SBA) has been proposed in 3GPP Release 15. To realize the idea of SBA, we propose Service Level Virtualization (SLV) in which each network entity is decomposed into different service blocks to provide respective services. In addition, each service block can be virtualized independently into different virtual machine. Thus, SLV can increase the flexibility of the core network.

Routers are expected to play an important role in the IP-based wireless data network. Although a substantial number of techniques have been proposed to improve wireless network performance under dynamic wireless channel conditions and host mobility, a system support framework is still missing. In this paper, we describe DIRAC, a software-based router system that is designed for wireless networks to facilitate the implementation and evaluation of various channel-adaptive and mobility-aware protocols. DIRAC adopts a distributed architecture that is composed of two parts: a Router Core (RC) shared by the wireless subnets, and a Router Agent (RA) at each access point/base station. RAs expose wireless link-layer information to the RC and enforce the control commands issued by the RC. This approach allows the router to make adaptive decisions based on link-layer information feedback. It also permits the router to enforce its policies (e.g., policing) more effectively through underlying link-layer mechanisms. As showcases, we implement under DIRAC the prototypes of three wireless network services: link-layer assisted fast handover, channel-adaptive scheduling, and link-layer enforced policing. Our implementation and experiments show that our distributed wireless router provides a flexible framework, which enables advanced network-layer wireless services that are adaptive to channel conditions and host mobility.

Corelite is a quality of service architecture that provides weighted max-min fairness for rate among flows in a network without maintaining any per-flow state in the core routers. There are three key mechanisms that work in concert to achieve the service model of Corelite: the introduction of markers in a packet flow by the edge routers to reflect the normalized rate of the flow; weighted fair marker feedback at the core routers upon incipient congestion detection; and linear increase/multiplicative decrease based rate adaptation of packet flows at the edge routers in response to marker feedback.

Article Free Access Share on An application-level multicast architecture for multimedia communications (poster session) Authors: Kang-Won Lee Coordinated Science Laboratory, University of Illinois at Urbana-Champaign Coordinated Science Laboratory, University of Illinois at Urbana-ChampaignView Profile , Sungwon Ha Coordinated Science Laboratory, University of Illinois at Urbana-Champaign Coordinated Science Laboratory, University of Illinois at Urbana-ChampaignView Profile , Jia-Ru Li Coordinated Science Laboratory, University of Illinois at Urbana-Champaign Coordinated Science Laboratory, University of Illinois at Urbana-ChampaignView Profile , Vaduvur Bharghavan Coordinated Science Laboratory, University of Illinois at Urbana-Champaign Coordinated Science Laboratory, University of Illinois at Urbana-ChampaignView Profile Authors Info & Claims MULTIMEDIA '00: Proceedings of the eighth ACM international conference on MultimediaOctober 2000 Pages 398–400https://doi.org/10.1145/354384.354544Published:30 October 2000Publication History 3citation357DownloadsMetricsTotal Citations3Total Downloads357Last 12 Months11Last 6 weeks0 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteeReaderPDF

We present a new transport protocol called HPF for effectively supporting heterogeneous packet flows in the Internet environment. The following are the key features of HPF: HPF supports packet flows where different packets in the same transport connection have different quality-of service requirements in term of reliability, priority, and deadlines. HPP supports application-level framing, and provides APIs for applications to specify the priority, reliability and timing requirements of each frame. HPF enables the use of application-specified priorities as hints for network routers to preferentially drop low-priority packets during congestion. This ensures that 'important data' gets through preferentially during congestion. HPF decouples the congestion control and reliability mechanisms in order to support congestion control for unreliable and heterogeneous packet flows. Preliminary performance measurements in our experimental testbed show that HPF can provide effective support for heterogeneous packet flows in the presence of dynamic network resources.