Sökning: "multihop"

Visar resultat 11 - 15 av 17 avhandlingar innehållade ordet multihop.

1. 11. Centralized Routing for Prolonged Network Lifetime in Wireless Sensor Networks

   Författare :Ewa Hansen; Mats Björkman; Mikael Nolin; Dag Nyström; Thiemo Voigt; Mälardalens högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Wireless sensor networks; routing; energy efficiency; asymmetric communicaiton; communication; power consumption; computer networks; trådlösa sensornät; trådlös; kommunikation; energikonsumtion; Computer science; Datavetenskap; Computer Science; datavetenskap;

   Sammanfattning : In this thesis centralized routing methods for wireless sensor networks have been studied. The aim has been to prolong network lifetime by reducing the energy consumed by sensor-node communication.Wireless sensor networks are rapidly becoming common in application areas where information from many sensors is to be collected and acted upon. LÄS MER

3. 12. Contention-based Multiple Access Architectures for Networked Control Systems

   Författare :Chithrupa Ramesh; Karl Henrik Johansson; Henrik Sandberg; Dawn Tilbury; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical engineering; Elektroteknik;

   Sammanfattning : Networked Control Systems (NCSs) use a wireless network for communication between sensors and controllers, and require a Medium Access Controller (MAC) to arbitrate access to the shared medium. Traditionally, a MAC for control systems is chosen primarily based on the delay it introduces in the closed loop. LÄS MER

4. 13. Relaying Protocols for Wireless Networks

   Författare :Majid Nasiri Khormuji; Erik G. Larsson; Christian Ibars; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; The relay channel; constellation rearrangement; decode-and-forward; resource allocation; Telecommunication theory; Telekommunikationsteori;

   Sammanfattning : Motivated by current applications in multihop transmission and ad hoc networks, the classical three-node relay channel consisting of a source-destination pair and a relay has received significant attention. One of the crucial aspects of the relay channel is the design of proper relaying protocols, i.e. LÄS MER

5. 14. Demand responsive resource management for cellular networks : link asymmetry, pricing and multihopping

   Författare :Magnus Lindström; Jens Zander; Narayan Mandayam; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical engineering; Elektroteknik; elektronik och fotonik; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

   Sammanfattning : Economic affordability of services and infrastructures has rapidly become one of the key issues in the evaluation and design of wireless access systems. The provisioning of high data rates, at an ``affordable'' price, constitutes a serious challenge to the structure and management of current and future wireless networks. LÄS MER

7. 15. On Adjacent Channel Interference-Aware Radio Resource Management for Vehicle-to-Vehicle Communication

   Författare :Anver Hisham Unnichiriyath Siddique; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; scheduling; adjacent channel interference ACI ; vehicle-to- vehicle V2V ; channel state information CSI ; convex optimization; LTE; vehicle-to-everything V2X ; combinatorial optimization; traffic efficiency; 3GPP; medium access control MAC ; power control; radio resource management RRM ;

   Sammanfattning : Safety applications play an essential role in supporting traffic safety and efficiency in next generation vehicular networks. Typical safety applications require vehicle-to-vehicle (V2V) communication with high reliability and low latency. LÄS MER