Integrated Inter-Tower Wireless Communications Network for Terrestrial Broadcasting and Multicasting Systems
Abstract : This paper describes systems, devices, and methods to implement a bi-directional integrated inter-tower wireless communications network (IITWCN). The described technology can be implemented in combination with the Broadcast Core Network (BCN) in next generation broadcast eco-system and, therefore, support new business cases for broadcast operators such as the delivery of flexible datacasting services or support broadcast or point-to-point Internet services. The introduced bi-directional inter-tower communications network (ITCN) extends the previous unidirectional in-band distribution links (IDL) and adopts the on-channel repeater (OCR) as a simplified backhaul solution in single frequency networks (SFN). The concept of the coordinated ITCN is also presented, aiming at future broadcast Internet services. The ITCN provides a scalable and configurable network solution embedded in a broadcast system, which becomes independent from any non-broadcasting telecommunication infrastructure. The described technology partially relies on the infrastructure of the underlying broadcast/multicast network, using the allocated service channels without requiring additional frequency bands or a separate frequency band. The bi-directional inter-transmitter communication links are therefore referred to as integrated transmission links and the corresponding network as an integrated network.
? A very high speed, multicast-enabled, satellite link (up to Gbps speed), direct to the local cell towers, from geostationary and/or nongeostationary satellites will complement existing terrestrial connectivity.
? This SUCC assumes that satellite connectivity will complement existing terrestrial connectivity, where available (such as, airports, harbors, train stations, and connected cars).
? While MPEG-DASH has many benefits such as offering flexibility through on-the-fly quality adaptation and its easy implementation over existing HTTP (Hypertext Transfer Protocol) infrastructure, the fact that DASH uses TCP (Transmission Control Protocol) is a double-edged sword.
? We introduce a new RAN interface design to support Terrestrial Broadcast and multicast with the minimal impact on the current 5G system.
? A slightly different approach is followed to address the requirement on large area coverage where the use of SFN modes are avoided when possible as this has a severe impact on the air-interface design.
? To the contrary, Terrestrial Broadcast infrastructure is usually heterogeneous and relies on local, regional or nationwide transmitter areas in SFN or in Multi Frequency Network (MFN) with some degree of frequency reuse.
? The number of new interfaces impacts directly the service integration and deployment complexity of the new broadcast/multicast system.
• The proposed scheme contains the following key operations at the mobile edge virtual CDN node: First, it realizes context awareness on network and users.
• SaT5G will propose new business models including the new value chains and diverse actors as well as show how they will come together to operate such a system.
• A purpose, satellite links can play a useful role to offload content traffic away from the terrestrial networks between the original content source and a virtual CDN node.
• It can be inferred that each virtual CDN node independently performs its own content popularity monitoring and prediction.
? The duplication can be used in the proposed architecture also for performance enhancement when the UE receives the same PDCP PDU over Dedicated Traffic Channel (DTCH) and Multicast logical Channel (XTCH) as a means for improving packet reliability.
? Latency performance parameters in cellular networks are usually divided into Control Plane latency and User Plane latency.
? This paper proposes an enhanced Next Generation RAN architecture based on 3GPP Release 15 with a series of architectural and functional enhancements, to support an efficient, flexible and dynamic selection between unicast and multicast/broadcast transmission modes and also the delivery of Terrestrial Broadcast services.
? The support of concurrent delivery of both unicast and PTM services to the users from the same cell, with efficient multiplexing with unicast transmissions is also taken into account.
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