PON Mobile Backhaul Bandwidth Provisioning for Video Traffic
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mobile network operators face challenges in meeting increasing bandwidth demands for high-definition video streaming due to high costs associated with upgrading mobile backhaul capacity, and existing solutions fail to effectively integrate bandwidth provisioning with cache management for efficient video delivery.
Innovation Solution
A method for software-defined passive optical network (PON) based mobile backhaul that groups bandwidth utilization into high-priority and low-priority categories, with high-priority bandwidth used for video requests not served by caches on base stations and remaining bandwidth allocated for caching low-priority videos, leveraging OFDMA-PON and centralized controller for joint optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If distributed caches are deployed on base stations to reduce MBH traffic, then bandwidth consumption is reduced, but the complexity of joint bandwidth provisioning and cache management increases
Solution Approach 1:
The patent segments bandwidth into two distinct categories: guaranteed bandwidth for high-priority video requests that cannot be served by caches, and best-effort bandwidth for low-priority video delivery to caches. This segmentation resolves the contradiction by providing a structured framework that reduces bandwidth consumption through cache utilization while maintaining manageable system complexity through clear priority-based resource allocation rules.
2Reliability
If guaranteed bandwidth is allocated to high-priority video requests, then service reliability is improved, but bandwidth utilization efficiency deteriorates due to unused reserved capacity
Solution Approach 1:
The patent implements dynamic bandwidth allocation where the guaranteed bandwidth portion is adaptively adjusted based on actual cache performance and traffic patterns. When caches effectively serve requests, guaranteed bandwidth is reduced; when cache performance deteriorates, guaranteed bandwidth increases. This dynamic approach resolves the contradiction by maintaining service reliability through adaptive guarantees while improving bandwidth utilization efficiency through flexible resource adjustment.
3Speed
If more bandwidth is provisioned for video delivery, then video delivery speed is improved, but operational expenditure increases due to costly MBH upgrades
Solution Approach 1:
The patent employs cache copying mechanisms where video content is replicated and stored at base station caches, enabling local delivery without requiring additional MBH bandwidth capacity. This resolves the contradiction by maintaining video delivery speed through distributed caching while avoiding operational expenditure associated with upgrading MBH infrastructure, as the same physical bandwidth serves both cached and non-cached content.
Data Source
AI summary
A method includes provisioning joint bandwidth in a software defined passive optical network PON based mobile backhaul MBH and cache management on base stations for video delivery across the network, the provisioning in each time unit includes grouping bandwidth utilization in the network into a first category used to support video requests which cannot directly be served by caches on base stations, the first category video requests being high priority, and if bandwidth remains after the high priority requests remaining bandwidth being used to deliver some videos that are low priority to caches.