MAC Apparatus with Segmented Modules for QoS Traffic
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Solution Overview
Problem
Current WLAN technologies face challenges in supporting Quality of Service (QoS) for various household appliances due to limitations in medium access control, particularly in handling diverse data characteristics and traffic types, leading to complexity in data processing and scheduling.
Innovation Solution
A media access control apparatus with multiple MAC modules, each processing data according to specific traffic characteristics, and a controller for integrated management, utilizing different MAC protocols such as MP-DCF, HCF, and DCF to classify and manage traffic data, enabling fair scheduling and improved QoS support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single MAC entity is used to control all traffic data requiring various QoSs, then the system structure remains simple, but it increases MAC complexity and has difficulty in supporting high QoS requirements
Solution Approach 1:
The patent divides the single MAC entity into multiple MAC entities (first MAC entity for voice traffic, second MAC entity for video traffic, third MAC entity for best-effort traffic). Each MAC entity independently handles specific traffic types with different QoS requirements, thereby reducing the complexity within each entity while maintaining overall QoS support capability.
2Adaptability or versatility
If the DCF transmission scheme is used, then the system structure remains simple, but it does not support priorities in accessing wireless medium, making it difficult to guarantee QoS
Solution Approach 1:
The patent segments the MAC protocol into different entities (DCF, PCF, HCF) that handle different traffic types. The first MAC entity uses DCF for voice traffic, the second uses PCF for video traffic, and the third uses HCF for best-effort traffic, enabling priority access without requiring a completely new protocol structure.
Solution Approach 2:
The patent creates a universal MAC system that can accommodate multiple MAC protocols (DCF, PCF, HCF) within different MAC entities. This multi-functional approach allows the system to support various QoS requirements using established protocols rather than developing a new protocol from scratch.
3Adaptability or versatility
If the HCF scheme is used to extend polling mechanism, then more traffic control capability is achieved, but it must control various QoS traffic using only one MAC entity, increasing MAC complexity
Solution Approach 1:
The patent divides the traffic control function across multiple MAC entities instead of concentrating it in one MAC entity. The first MAC entity handles voice traffic with DCF, the second handles video traffic with PCF, and the third handles best-effort traffic with HCF, segmenting the complexity while maintaining comprehensive traffic control capability.
Data Source
AI summary
A Medium Access Control (MAC) apparatus and method for use in a channel overlay network of a wireless access system. The wireless access system, which is based on a multi-carrier, includes a plurality of physical modules for receiving signals from a plurality of terminals, a plurality of MAC (Medium Access Control) modules for processing the signals received via the physical modules while being classified according to predetermined traffic classes, and a controller connected to the MAC modules for integratedly managing the MAC modules. The MAC apparatus includes an additional MAC module used for a control channel and a plurality of MAC modules for supporting various QoS traffic data according to individual classes, thereby improving scheduling complexity in a MAC layer.