Refine
Departments, institutes and facilities
Document Type
- Conference Object (40)
- Article (6)
- Part of a Book (1)
- Doctoral Thesis (1)
- Patent (1)
Year of publication
Has Fulltext
- no (49) (remove)
Keywords
- Internet (2)
- Customization (1)
- Forschungsprojekt (1)
- IEEE 802.11n (1)
- IEEE 802.21 (1)
- Kommunikationsvernetzung (1)
- LoRa (1)
- LoRaWAN (1)
- Long-distance (1)
- MIMO (1)
- MPLS (1)
- Multicast communication (1)
- Norm (1)
- Open source firmware (1)
- OpenFlow (1)
- Paketvermittlung (1)
- QoS (1)
- Qualitäts-Service (1)
- Router (Rechnernetz) (1)
- SDN (1)
- SDWN (1)
- Scalability (1)
- Security (1)
- TLS (1)
- Telecommunication network reliability (1)
- Telecommunication network routing (1)
- WDS (1)
- Weitverkehrsnetz (1)
- WiAFirm (1)
- WiFi (1)
- Wireless Backhaul Network (1)
- Wireless back-haul (1)
- einheitliches Internet-Übertragungsprotokoll (1)
- link calibration (1)
- lokales Netz (1)
- self-configuration (1)
- self-management (1)
- verteiltes System (1)
- wmSDN (1)
- Übertragungsqualität (1)
Die Erfindung betrifft ein System (1) zum Ausrichten einer Richtfunkantenne (a1) auf eine weitere Richtfunkantenne (a2). Das System weist ein Positioniermittel (P) auf, welches an einem vom Ort der auszurichtenden Richtfunkantenne (a1) und vom Ort der weiteren Richtfunkantenne (a2) verschiedenen Ort positioniert ist, wobei der Ort des Positioniermittels (P) vom Ort der auszurichtenden Richtfunkantenne (a1) aus einsehbar ist. Erfindungsgemäß umfasst das System (1) ferner ein Berechnungsmittel (L), das ausgebildet ist, einen Ausrichtungsfehler (α) der auszurichtenden Richtfunkantenne (a1) zu bestimmen, wobei der Ausrichtungsfehler (α) einen Winkel angibt, der zwischen einer ersten virtuellen Geraden (g1), welche den Ort der auszurichtenden Antenne (a1) und den Ort der weiteren Richtfunkantenne (a2) beinhaltet, und einer zweiten virtuellen Geraden (g2), welche den Ort der auszurichtenden Antenne (a1) und den Ort des Positioniermittels (P) beinhaltet, liegt.
SDN and WMN evolved to be sophisticated technologies used in a variety of applications. However, a combined approach called wmSDN has not been widely addressed in the research community. Our idea in this field consists of WiFi-based point-to-point links managed by the OpenFlow protocol. We investigate two different issues regarding this idea. First, which WiFi operational mode is suitable in an OpenFlow managed broadcast domain? Second, does the performance decrease compared with other routing or switching principles? Therefore, we set up a real-world testbed and a suitable simulation environment. Unlike previous work, we show that it is possible to use WiFi links without conducting MAC address rewriting at each hop by utilizing the 4-address-mode.
This work describes extensions to the well-known Distributed Coordination Function (DCF) model to account for IEEE802.11n point-to-point links. The developed extensions cover adaptions to the throughput and delay estimation for this type of link as well peculiarities of hardware and implementations within the Linux Kernel. Instead of using simulations, the approach was extensively verified on real-world deployments at various link distances. Additionally, trials were conducted to optimize the CWmin values and the number of retries to maximize throughput and minimize delay. The results of this work can be used to estimate the properties of long-distance 802.11 links beforehand, allowing the network to be planned more accurately.