RADIO ON RADIO OVER FIBER EFFICIENT FRONTHAULING FOR SMALL CELLS AND MOVING CELLS
Download as PPTX, PDF2 likes875 views
This document discusses radio on radio over fiber (RoRoF) fronthauling for efficient transmission of mobile signals in small cells and moving cells. RoRoF uses a combination of fiber and radio links, where optical signals are converted to radio signals and vice versa. This allows analog radio signals to be transmitted over fiber with low bandwidth and latency requirements. Key applications are providing connectivity to fast moving trains and deploying ultra-dense small cells where fiber is not feasible. The system offers advantages of scalability, low latency, power efficiency and centralized management. Challenges include developing high performance systems for MIMO transmission in ultra-dense small cell environments.
RADIO ON RADIO OVER FIBER EFFICIENT FRONTHAULING FOR SMALL CELLS AND MOVING CELLS
- 1. RADIO ON RADIO OVER FIBER EFFICIENT FRONTHAULING FOR SMALL CELLS AND MOVING CELLS Wireless Communication SUBMITTED BY Mafaz Ahmed 1882-FET/BSEE/F12
- 2. Introduction Radio On Radio Over Fiber means the combination of radio-link and fiber link (for mobile signal transmission) A combination of fiber and radio links based on photonics technologies are used to generate and transmit radio wave signals
- 3. Fronthauling Fronthaul is the connection between a centralized Base Band Unit (BBU) and remote standalone radio cells (Nodes) This is a high-speed and low-latency transmission links
- 4. Remote Radio Head (RRH) & Remote Antenna Unit (RAU) Remote Radio Head & Remote Antenna Unit are remote radio transceivers used to connects to an operator radio control panel via electrical or wireless interface At RAUs, the optical signal is converted to a wireless or electrical signal At remote radio heads (RRHs), the received wireless or electrical signal is converted back to mobile signal
- 5. FIBER AND RADIOWAVECOMBINATIONS a: conventional optical-mmWave link; b seamless optical and mmWave connection; c: analog radio on a seamless optical-mmWave system.
- 6. FIBER AND RADIOWAVECOMBINATIONS Conventional System of Fig 1.a is complicated, high cost, high power consumption, and long transmission delay System of Fig 1.b RAUs to be very simple, but system require high bandwidth requirement, signal synchronization needs, high jitter, and long latency System of Fig 1.c is more suitable, especially for small-cell based networks because of Analog waveform transmission of mobile signals require low bandwidth. Simplifies the RAUs and RRHs, and considerably reduce the cost, power consumption, and latency compared to the conventional systems
- 7. APPLICATIONS TO FRONTHAUL NETWORKS Important application of the system is to provide broadband connections to moving cells, such as on fast-moving trains Several RAUs can be located along the railway track and connected to the CSs by fiber cables. RRHs can be installed on the trains to communicate directly with users. Antenna units on the trains (TAUs) can receive and transmit mmWave signals from/to RAUs. By this method, it is possible to send the same signals to the trains, even when the train moves to a new RAU. A real handover procedure will be needed when the trains move to a RAU that is controlled by another CS. Moving cells
- 8. APPLICATIONS TO FRONTHAUL NETWORKS A seamless combination of fiber optic and radio systems is particularly suitable for deployment of ultra-dense small cells, especially in areas where the use of fiber cables is not feasible The frequency range from 70 to 110 GHz (E- and W-bands) is suitable for applications to fronthaul networks because of its small atmospheric attenuation To compensate for high free space loss in the mmWave bands, highly directive and high gain antennas are used Small cells
- 9. APPLICATIONS TO FRONTHAUL NETWORKS Moving cellsSmall cells
- 10. ADVANTAGES OF THE SYSTEM Scalability Latency Power consumption Handover Centralized management
- 11. CHALLENGES AND PERSPECTIVE High-performance system Ultra-dense small cells Multiple-input multiple-output (MIMO) signal transmission
- 12. The End