scholarly journals IF-over-Fiber Technology Aiming at Efficient Bandwidth Utilization and Perfect Centralized Control for Next-Generation Mobile Fronthaul Links in C-RAN Architectures

2018 ◽  
Vol E101.B (4) ◽  
pp. 952-960 ◽  
Author(s):  
Shota ISHIMURA ◽  
Byung-Gon KIM ◽  
Kazuki TANAKA ◽  
Shinobu NANBA ◽  
Kosuke NISHIMURA ◽  
...  
Keyword(s):  
Centralized Control ◽  
Next Generation ◽  
Bandwidth Utilization ◽  
Fiber Technology

scholarly journals Traffic management with elephant flow detection in software defined networks (SDN)

2019 ◽  
Vol 9 (4) ◽  
pp. 3203
Author(s):  
Hnin Thiri Zaw ◽  
AungHtein Maw
Keyword(s):  
Traffic Management ◽  
Shortest Paths ◽  
Traffic Load ◽  
Management Approach ◽  
Centralized Control ◽  
Least Cost Path ◽  
Bandwidth Utilization ◽  
Traffic Splitting ◽  
Management Method ◽  
Flow Detection

Multipath routing is to distribute the incoming traffic load among available paths between source and destination hosts. Instead of using the single best path, multipath scheme can avoid the congested path. Equal Cost Multi-Path (ECMP) performs the static traffic splitting based on some tuples of the packet headers. The limitation of ECMP does not consider the network parameters such as bandwidth and delay. Unlike the traditional networks, Software-Defined Network (SDN) has many advantages to support dynamic multipath forwarding due to its special characteristics, such as separation of control and data planes, global centralized control, and programmability of network behavior. In this paper, we propose a new architecture design for dynamic multipath-based traffic management approach in the SDN, which comprises of five components: detecting long (elephant) flow, computing shortest paths, estimating end-to-end delay and bandwidth utilization, calculating least cost path and rerouting traffic flow from the ongoing path to the best path. The simulation environment is created through the usage of Mininet emulator and ONOS controller. The evaluation outcomes show that the proposed traffic management method outperforms the ECMP and reactive forwarding method for both TCP and UDP traffic.

Radio over Fiber for Broadband Communications

2009 ◽  
pp. 80-103 ◽  
Author(s):  
Sotiris Karabetsos ◽  
Spiros Mikroulis ◽  
Athanase Nassiopoulos
Keyword(s):  
Optical Fiber ◽  
Communication Networks ◽  
High Capacity ◽  
Radio Over Fiber ◽  
Literature Survey ◽  
Wireless Access ◽  
Next Generation ◽  
Efficient Approach ◽  
Fiber Technology ◽  
Broadband Communications

The high capacity offered by the optical fiber, combined with the mobility and the flexibility of wireless access, either fixed or not, provides an efficient approach to alleviating the requirements posed by the envisaged provision of any-service, anytime and anywhere, next generation communication networks. The objective of this chapter is to present an overview of Radio-over-Fiber technology, as an emerging infrastructure for next generation, fiber-based, wireless access broadband networking. In particular, the fundamental concept of Radio-over-Fiber technology is reviewed and the partial components comprising it are discussed. Furthermore, the associated architectures are depicted and a short literature survey of trends and applications is considered.

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