Service-Based Radio Access Network Reliability Admission Control
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Solution Overview
Problem
Current 3GPP 4G and 5G standards lack a mechanism for differentiated network behavior across various reliability aspects, including service reliability, which is crucial for ensuring high availability of communications services like Push-to-Talk (PTT), and only provide reliability guarantees at the Transport Layer level, failing to meet stringent requirements for public safety devices.
Innovation Solution
Implementing a subscriber and/or service-based radio access network reliability model that uses reliability profiles with specific levels (N-9s) for network packet layer transmissions, communications service availability, and prioritized resource allocation, allowing operators to define reliability profiles and wireless devices to indicate desired reliability levels during admission control, thereby optimizing hardware and software resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional hardware reliability models (MTBF, MTTF) are used, then hardware resource availability is improved, but service reliability requirements cannot be met
Solution Approach 1:
The patent changes the reliability parameter from hardware-centric (MTBF, MTTF) to service-centric (service availability, communication reliability). It introduces multiple reliability parameters including service reliability targets, communication service availability levels, and packet transmission reliability to differentiate network behavior across various service types and device categories.
Solution Approach 2:
The patent segments reliability handling into multiple layers: hardware reliability, service reliability, and communication reliability. It further segments service reliability into different levels (e.g., 99.9%, 99.99%, 99.999%) and applies differentiated reliability requirements to different device classes (public safety, public utility, emergency services, general users).
2Reliability
If reliability is defined only at Transport Layer level, then broadband data applications are supported, but service-specific reliability requirements cannot be guaranteed
Solution Approach 1:
The patent extends reliability handling from the traditional Transport Layer dimension to include service-specific dimensions. It introduces service reliability targets, communication service availability, and packet transmission reliability as additional dimensions, allowing differentiated reliability treatment across multiple layers including network layer and application layer.
Solution Approach 2:
The patent creates a universal reliability framework that can handle multiple service types (VoIP, PTT, video, broadband data) with different reliability requirements through a common architecture. The framework uses service identification, reliability target indication, and admission control mechanisms that work across diverse service types without requiring separate specialized systems.
3Ease of operation
If Access Class Barring is used for cell overload, then network access for specific classes is permitted, but differentiated reliability handling is insufficient
Solution Approach 1:
The patent performs preliminary reliability assessment during admission control before service establishment. The network node determines whether service reliability targets can be met by evaluating available resources, current load conditions, and service requirements. This preliminary action ensures that only services with achievable reliability targets are admitted, preventing overload and ensuring service quality from the outset.
Solution Approach 2:
The patent implements feedback mechanisms where the network node monitors service reliability performance and compares it against targets. Admission control decisions are based on feedback regarding current network conditions, resource availability, and historical reliability performance. This closed-loop approach enables dynamic adjustment of admission control parameters to maintain differentiated reliability handling.
Data Source
AI summary
Methods and systems for performing admission control include receiving an indication of at least one service reliability target associated with at least one service and determining whether one of the at least one service reliability targets is met. If the one of the at least one service reliability targets is met, an initial context associated with the service is configured. The at least one service reliability targets may be received with an initial context setup request message and responded to with either an initial context setup failure message or an initial context setup response message.