Читать книгу Wireless Connectivity - Petar Popovski - Страница 46

In this chapter we have used the dark room analogy to depict a situation in which the same wireless channel needs to be used for coordination and control of transmissions, as well as for the transmission of the actual data. This problem is addressed through the broad class of random access protocols. Two different paradigms for random access have been presented: protocols based on ALOHA and the tree-splitting protocols based on probing. By extending the communication model to introduce minislots, we have introduced the widely used mechanism of carrier sensing. Finally, the chapter presented some challenges and possible solutions to random access problems applied in a wireless multi-hop setting.