Fully Distributed Energy-Efficient Synchronization for Half-duplex D2D Communications
| Autor: | Benoit Champagne, Onur Karatalay, Benoit Pelletier, Ioannis N. Psaromiligkos |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Computer science
business.industry Network packet 020208 electrical & electronic engineering Process (computing) 020206 networking & telecommunications 02 engineering and technology Synchronization Distributed generation Synchronization (computer science) 0202 electrical engineering electronic engineering information engineering business Efficient energy use Computer network |
| Zdroj: | PIMRC |
| DOI: | 10.1109/pimrc.2019.8904249 |
| Popis: | Synchronization is a challenging problem especially for distributed systems, such as out-of-coverage D2D networks, as no common reference time is available. In such cases, devices use distributed synchronization algorithms, however, accurately determining when to stop the synchronization process is as challenging as achieving synchronization since they do not have the synchronization status of other devices in the network. From energy efficiency and performance perspective, the synchronization process should be stopped at all devices at the same time. In addition, to counteract the effect of propagation delays during synchronization, timing-advance (TA) clocks should be employed. This could be achieved in the synchronization process, however, after the devices are synchronized, there is no central mechanism to instruct them on TA clocks for transmitting or receiving data packets. In this paper, we propose a synchronization algorithm which, in an energy-efficient manner, allows devices to (i) acquire the synchronization status of others and terminate the synchronization process as soon as all devices in the network are synchronized, (ii) allow the synchronized devices to properly advance/regress their clocks prior to data communication by tracking their relative timing. We numerically demonstrate that the maximum synchronization error over multipath channels is around 0.6µs and it can be maintained during data communication. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|