Multicast-broadcast single-frequency network: Difference between revisions

Revision as of 20:02, 2 May 2014

Revision as of 20:14, 2 May 2014

Line 4:

<ref name=Fitchard0>{{cite web|last=Fitchard|first=Kevin|title=Why Qualcomm thinks LTE-broadcast will work where FLO TV failed|url=http://gigaom.com/2013/04/09/why-qualcomm-thinks-lte-broadcast-will-work-where-flo-tv-failed/|accessdate=9 April 2013}}</ref>

The eMBMS service is based on the principles of [[Interactive Multicast]], where TV content only is transmitted where there currently are viewers, and where each TV program only is tranmitted once in each cell, also if there are several viewers of that program in the same cell. The MBSFN transmission mode further is also based on the principles of [[Dynamic single frequency networks]] (DSFN), meaning that it further improves the [[system spectral effiency]] by dynamically formsforming single-frequency networks (SFNs), i.e. groups of adjacent base stations that sends the same signal simultaneously on the same frequency sub-carriers, when there are mobile TV viewers of the same TV program content in the adjacent cells. The LTE [[OFDMA]] downlink modulation and multiple access scheme eliminiates self-interference caused by the SFN:s. Efficient TV transmission using similar combinations of Interacive multicast (IP Multicast) and DSFN has also been suggested for the DVB-T2 and DVB-H systems.<ref>M. Eriksson, S.M. Hasibur Rahman, F. Fraille, M. Sjöström, ”[http://apachepersonal.miun.se/~mageri/myresearch/bmsb2013-Eriksson.pdf Efficient Interactive Multicast over DVB-T2 - Utilizing Dynamic SFNs and PARPS]”, 2013 IEEE International Conference on Computer and Information Technology (BMSB’13), London, UK, June 2013.</ref>

==Technical details==