Обзор сценариев использования широковещательной передачи в сетях LTE

Abstract

Introduction: Standards for 4G networks provide a way to transfer the same data to multiple users in a broadcast manner. This brings new opportunities to mobile operators for offering and deploying new mobile services. However, broadcast transmission is not usable for all possible scenarios and the standards do not provide any guideline answering the question. Purpose: We discuss possible broadcast transmission usage scenarios, introduce some metrics of effectiveness and use them for comparison between unicast and broadcast transmission schemes. Results: It is demonstrated that in order to support such a transmission mode, new logical nodes should be added into the core and radio networks. Twelve different scenarios of possible effective broadcast transmission scheme usage are described. Two problems are provided and solved in order to find out when it is better to use the broadcast transmission scheme rather than the unicast one. The article contains information about broadcast transmission scheme usage (deployments, trials, tests) through mobile networks all around the world. Practical relevance: The proposed approaches allow the operators and manufacturers to develop their own ways for effective usage of the broadcast transmission scheme.