Heterogeneous Carrier Aggregation at MAC Layer
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Solution Overview
Problem
Current wireless communication systems face challenges in aggregating heterogeneous carriers, such as cellular and WLAN carriers, below the IP layer, which limits the efficiency and flexibility of spectrum utilization and service quality.
Innovation Solution
The method involves configuring mobile devices to aggregate heterogeneous carriers at the MAC-layer or RLC-layer, determining traffic mappings based on logical channel identifiers or bearer identifiers, and sending traffic accordingly to optimize carrier selection and utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If carrier aggregation is performed at the IP layer or above, then implementation complexity is reduced, but aggregation efficiency and service quality deteriorate
Solution Approach 1:
The patent introduces a new dimension by performing carrier aggregation at the MAC layer instead of at the IP layer or above. This dimensional change in the protocol stack enables direct control over radio resources and traffic routing, thereby improving aggregation efficiency and service quality while maintaining manageable implementation complexity through standardized MAC layer procedures.
2Quantity of substance
If heterogeneous carriers (cellular and WLAN) are aggregated, then available spectrum increases, but system complexity and management difficulty increase
Solution Approach 1:
The patent introduces an intermediary mechanism at the MAC layer that acts as a mediator between different heterogeneous carriers (cellular and WLAN). This intermediary performs traffic routing, carrier selection, and resource management functions, enabling the system to aggregate diverse carriers while managing complexity through a unified control plane that handles the heterogeneity transparently.
Solution Approach 2:
The MAC layer aggregation mechanism is designed with universal functionality that can handle multiple types of carriers (cellular and WLAN) through a single unified framework. This multi-functional approach allows the system to aggregate heterogeneous carriers without requiring separate management systems for each carrier type, thereby increasing available spectrum while controlling system complexity.
3Ease of manufacture
If carrier aggregation is implemented without traffic mapping, then implementation is simpler, but service quality and carrier utilization deteriorate
Solution Approach 1:
The patent applies preliminary action by establishing traffic mappings between logical channels and component carriers before actual data transmission occurs. This pre-configuration of traffic routes enables the system to automatically direct traffic to appropriate carriers based on predefined criteria, thereby maintaining service quality and optimal carrier utilization without adding complex real-time decision-making mechanisms.
Data Source
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AI summary
Techniques for aggregating heterogeneous carriers in a wireless communication system are disclosed. A mobile device may receive a configuration for aggregating a plurality of component carriers including one or more cellular carriers and a wireless local area network (WLAN) carrier. The one or more cellular carriers may include LTE carriers, and aggregation may be performed at a sub-IP protocol layer of operation. In one aspect, protocol entities may be modified to perform quality of service determinations, carrier selection, traffic mapping, or the like, in view of the different capabilities and characteristics of the heterogeneous carriers in the carrier aggregation configuration.