Improving LTE MBMS With Extended OFDM Parameters and Layered-Division-Multiplexing

The evolved multimedia broadcast multicast service (eMBMS) system was developed to achieve higher spectrum efficiency on video traffic delivery over the long term evolution (LTE) networks. As an integrated component of the LTE, eMBMS can be deployed with great flexibility using the existing LTE infr...

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Bibliographic Details
Published in:IEEE transactions on broadcasting 2017-03, Vol.63 (1), p.32-47
Main Authors: Liang Zhang, Yiyan Wu, Walker, Gordon Kent, Wei Li, Salehian, Khalil, Florea, Adrian
Format: Article
Language:English
Subjects:
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channel estimation
Cloud Transmission
Digital TV
Layered-Division-Multiplexing
LDM
Long Term Evolution
MIMO
MISO
Mobile communication
mobile service
multiple-layer transmission
OFDM
Receivers
SIMO
SISO
successive signal cancellation
Transmitters
UHDTV
Unicast
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Summary:The evolved multimedia broadcast multicast service (eMBMS) system was developed to achieve higher spectrum efficiency on video traffic delivery over the long term evolution (LTE) networks. As an integrated component of the LTE, eMBMS can be deployed with great flexibility using the existing LTE infrastructure. However, the current eMBMS was designed as a supplementary subsystem, and has limited capability to deliver high-quality broadcast-type video services in a spectrum efficient manner. This paper first studies the capability and limitations of the current LTE eMBMS system to deliver broadcast services when deployed as single-frequency-network (SFN). Next, potential physical-layer enhancements are investigated for future eMBMS systems to achieve enhanced broadcast service delivery capability, higher spectrum efficiency, improved service quality, and more efficient SFN deployment options. These include wideband transmission, non-orthogonal multiplexing, e.g., layered-division-multiplexing technology, and more flexible orthogonal frequency division multiplexing system configurations, such as longer cyclic prefix and smaller subcarrier spacing. Other technologies defined in the latest next generation digital television system are also discussed that might be applicable to the development of a more capable standalone future eMBMS system.
ISSN:0018-9316
1557-9611
DOI:10.1109/TBC.2016.2630269