Dynamic Cellular Broadcast Offload via Traffic Analysis
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Solution Overview
Problem
Current broadband networks face congestion and quality of service (QoS) challenges due to increasing video traffic, especially in cellular networks, where Wi-Fi offloading is not optimal for video and high QoS demanding services, and existing solutions like eMBMS do not effectively address the issue of spectral efficiency and latency.
Innovation Solution
A system and method for dynamically switching transmission of selected data from a cellular core network to a unidirectional point-to-multipoint downlink network based on traffic flow analysis, utilizing a cellular packet core, a Broadcast Offload Packet Core (BO-PC), and a load manager that includes an analytics engine to monitor and control traffic flow, switching between cellular and broadcast networks to optimize QoS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If Wi-Fi is used for offloading cellular traffic, then bandwidth capacity is increased, but QoS (latency and jitter) deteriorates and transmission resources are competed for between uplink and downlink
Solution Approach 1:
The patent segments the network into two distinct paths: a bidirectional cellular path for interactive traffic requiring low latency, and a unidirectional broadcast path for video content delivery. This segmentation allows each path to be optimized for its specific traffic type, preventing QoS degradation while maintaining high bandwidth capacity for video offloading.
Solution Approach 2:
The patent introduces a broadcast gateway and content delivery network as intermediary components that enable video traffic to be offloaded to a dedicated broadcast infrastructure. This intermediary layer separates video delivery from the cellular network, eliminating resource competition and ensuring consistent QoS for both cellular and video traffic.
2Quantity of substance
If eMBMS is used for broadcast services, then spectral efficiency is improved for linear TV, but it shares the same spectral resources as cellular traffic and does not solve general congestion problems
Solution Approach 1:
The patent creates a universal broadcast offloading architecture that can serve multiple functions: linear TV delivery, video streaming, software updates, and other data-intensive services. The system uses standardized broadcast interfaces that can carry various types of traffic, making the solution versatile for different congestion scenarios beyond just linear TV.
Solution Approach 2:
The patent introduces a broadcast gateway and content delivery network as intermediary components that enable video traffic to be offloaded to a dedicated broadcast infrastructure. This intermediary layer separates video delivery from the cellular network, eliminating resource competition and ensuring consistent QoS for both cellular and video traffic.
3Reliability
If unicast PHY from 3GPP LTE is used for video delivery, then connectivity is provided, but QoS requirements conflict and latency management is poor for video traffic
Solution Approach 1:
The patent segments the network into two distinct paths: a bidirectional cellular path for interactive traffic requiring low latency, and a unidirectional broadcast path for video content delivery. This segmentation allows each path to be optimized for its specific traffic type, preventing QoS degradation while maintaining high bandwidth capacity for video offloading.
Data Source
AI summary
A system and method for dynamically switching transmission of selected data from cellular core network to unidirectional point-to-multipoint downlink network or from unidirectional point-to-multipoint downlink network to cellular core network based on traffic flow analysis is provided. The system includes a cellular packet core 206, a broadcast offload packet core (BO-PC) 302, and a load manager 202. The cellular packet core 206 controls a cellular radio access network (RAN) 412 for providing bidirectional connectivity to a converged user equipment (UE) (204) to transmit or receive selected data through the cellular packet core 206 and the RAN 412. The BO-PC 302 controls a broadcast radio access network (RAN). The broadcast radio access network (RAN) includes at least one Broadcast Radio Head (BRH) 322 for providing unidirectional downlink path to the converged user equipment (UE) 204 to receive selected data through the at least one Broadcast Radio Heads (BRH) 322.