Energy- and latency-efficient broadcastingmechanism supporting long-term evolution e-multimedia broadcast/multicast service transmission

To provide increasing multimedia broadcast/multicast services (MBMSs), the third generation partnership project modified long-term evolution release nine documents to further support evolved MBMSs (e-MBMS). This study designed a data-broadcasting method called evolved broadcast scheduling algorithm (eBSA). This eBSA provides new scheduling technology for e-MBMS and a new information searching method for user equipments (UEs) that simultaneously conserves UE energy and maintains favourable access latency of broadcast messages. The eBSA constructs index and message channels based on the message popularities, using the index channel to guide UEs to rapidly locate the position of the desired message in the message channel. If searching for unpopular messages, the index channel guides UEs directly to conduct a linear search. Consequently, a short mean access time and mean turning time can be attained. The results of numerical analysis verify that when access messages possess skewed-access characteristics, the proposed eBSA method performs exceptionally. Additionally, by adequately adjusting the parameter provided by the eBSA method, the optimal tradeoff between energy conservation and access latency performance can be attained.