Traffic Management in Multi-RAT Wireless Networks
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Solution Overview
Problem
Conventional wireless systems face challenges in efficiently managing and distributing traffic across multiple Radio Access Technologies (RATs), leading to lower spectral efficiency and inability to meet service level agreements, as legacy RATs struggle to carry as much traffic as newer ones.
Innovation Solution
Implementing a combination of Network Function Virtualization (NFV) and Software Defined Networking (SDN) to monitor and control traffic between different RATs, utilizing a shared core network to dynamically adjust routing resources and allocate bandwidth based on traffic type and quality of service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional wireless systems simultaneously support multiple radio access technologies, then legacy communication devices can still use older RATs, but spectral efficiency decreases and traffic capacity is limited
Solution Approach 1:
The patent segments traffic into different categories (e.g., voice, video, data) and allocates different RATs to different traffic types. The base station divides available resources among multiple RATs based on traffic characteristics, allowing newer RATs to handle high-speed data while legacy RATs handle voice and low-speed traffic, thereby improving overall spectral efficiency while maintaining multi-RAT support
Solution Approach 2:
The system dynamically adjusts resource allocation between different RATs based on real-time traffic conditions, user preferences, and network status. The base station can shift traffic between RATs dynamically, enabling the network to optimize spectral efficiency by directing traffic to the most appropriate RAT at any given moment while maintaining the ability to support both legacy and newer technologies
2Adaptability or versatility
If legacy radio access technologies are maintained for backward compatibility, then existing devices can continue to operate, but traffic capacity and service level agreement compliance are insufficient
Solution Approach 1:
The patent applies different quality treatments to different traffic types and users. The base station identifies traffic requiring high reliability (such as voice or real-time communications) and directs it through specific RATs or network paths that guarantee SLA compliance, while allowing less critical traffic to use alternative paths. This localized quality optimization ensures SLA compliance for critical services while maintaining backward compatibility for legacy devices
Solution Approach 2:
The system implements feedback mechanisms where the base station monitors traffic performance, user experience, and network conditions in real-time. Based on this feedback, the system adjusts resource allocation and traffic routing to ensure SLA compliance. If certain RATs or paths fail to meet SLA requirements, the system automatically redistributes traffic to alternative paths that do satisfy the agreements, while maintaining compatibility with existing devices
3Area of stationary object
If traffic is distributed across multiple radio access technologies, then network coverage is expanded, but control complexity and routing management increase
Solution Approach 1:
The patent introduces a traffic management system as an intermediary between the base station and the core network. This intermediary component handles the complexity of routing decisions by receiving traffic information from the base station, determining optimal paths based on pre-configured policies and network conditions, and directing traffic to appropriate network elements. This intermediary layer simplifies the overall control architecture by centralizing routing management functions
Solution Approach 2:
The system manages complexity by dynamically changing routing parameters such as priority levels, bandwidth allocations, and path selections based on real-time conditions. Instead of maintaining complex static routing configurations, the system adjusts key parameters like QoS metrics and traffic priorities to achieve optimal traffic distribution across multiple RATs, thereby expanding network coverage while reducing control complexity through parameter-based management
Data Source
AI summary
A wireless network environment includes communication management hardware, a wireless base station, a core network, and multiple remote networks. The communication management hardware monitors traffic associated with first radio access technology and second radio access technology supported by the wireless base station. The monitored traffic is conveyed through a core network such as from the wireless base station to the remote networks or from the remote networks to the wireless base station. The controller produces control information to convey the traffic through the core network between the wireless base station and multiple remote networks. Based on the control information, the communication management hardware controls conveyance of the monitored traffic through the core network depending on whether the traffic is associated with first radio access technology or second radio access technology.