Shared Backhaul Admission Control for Congestion Mitigation
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Solution Overview
Problem
Congestion in shared-backhaul telecommunications networks, particularly in LTE networks, affects network operations due to varying traffic types and priorities, leading to adverse impacts on service quality, especially during emergency situations where prioritization of messages is critical.
Innovation Solution
Implementing admission control policies across a multi-node radio access network with a shared backhaul connection to assess congestion states and perform actions such as denying requests, dropping non-prioritized connections, preempting prioritized connections, and randomly dropping users to manage congestion, using a gateway node to propagate policies and manage traffic flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If admission control policies are implemented to prioritize critical traffic, then service reliability for emergency services is improved, but network complexity increases due to multiple policy levels and congestion state assessments
Solution Approach 1:
The patent segments admission control into multiple hierarchical levels (first, second, third, fourth admission control policies) that correspond to different congestion states. Each level handles specific priority scenarios, allowing the system to manage complexity through structured division while maintaining reliable emergency service prioritization.
Solution Approach 2:
The gateway node pre-assesses congestion states and determines appropriate admission control policies before traffic actually congests the network. By evaluating congestion indicators in advance and applying preventive admission control, the system maintains service reliability without requiring complex real-time reactions to severe congestion.
2Productivity
If congestion assessment and policy propagation are performed centrally at the gateway node, then congestion mitigation efficiency is improved, but the gateway node's processing load increases
Solution Approach 1:
The patent extracts the complex congestion assessment and policy determination functions from individual base stations and concentrates them at the gateway node. This centralization improves overall congestion mitigation efficiency by providing unified network-wide visibility, while the gateway node's superior processing capabilities handle the increased load.
Solution Approach 2:
The gateway node acts as an intermediary between the core network and multiple base stations. It receives congestion indicators from base stations, processes them centrally, and propagates admission control policies back to the network, distributing the processing burden appropriately while maintaining efficient congestion response.
3Adaptability or versatility
If multiple admission control policies with different priority levels are implemented, then traffic prioritization capability is improved, but the difficulty of policy management and configuration increases
Solution Approach 1:
The patent implements different admission control policies with distinct priority characteristics tailored to specific traffic types and congestion states. Each policy (first through fourth) has localized quality attributes suited to its intended scenario, enabling fine-grained traffic prioritization while the gateway node manages the complexity of coordinating these differentiated policies.
Data Source
AI summary
A method for congestion mitigation via admission control in a shared-backhaul telecommunications network is disclosed, comprising: assessing a congestion state in a multi-node radio access network having a shared backhaul connection, the congestion state based on congestion of the shared backhaul connection; retrieving an admission control policy based on the congestion state of the shared backhaul connection; performing a policy action of the admission control policy at a first base station acting as a gateway for the multi-node radio access network with respect to the shared backhaul connection; and sending the admission control policy to other nodes in the multi-node radio access network, thereby causing the other nodes to perform the policy action, wherein the policy action is denying a request from a user equipment to attach to the radio access network.