Uplink Grant Allocation for Logical Channels in Carrier Aggregation
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Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing carrier aggregation and resource allocation, particularly in scenarios requiring high data rates and seamless mobility, where traditional methods struggle to optimize network efficiency and spectrum utilization.
Innovation Solution
The implementation of advanced radio transmission mechanisms, such as OFDM, CDMA, and hybrid transmission schemes, along with adaptive modulation and coding, enables efficient carrier aggregation and resource allocation, particularly utilizing unlicensed spectrum through LAA technology for enhanced network efficiency and capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional resource allocation methods are used in multicarrier systems, then device complexity is reduced, but network efficiency and spectrum utilization deteriorate
Solution Approach 1:
The patent segments uplink grants into multiple parts and allocates them to different logical channels based on priority levels. Instead of treating all grants uniformly, the system divides resources into segments that can be independently managed and allocated to specific logical channels, thereby improving network efficiency without overwhelming device complexity through fine-grained control
Solution Approach 2:
The patent implements dynamic resource allocation where the allocation of uplink grants to logical channels changes based on real-time buffer status, priority levels, and channel conditions. The MAC entity dynamically adjusts which logical channel receives resources from which grant, allowing the system to adapt to varying network conditions and optimize performance without requiring static complex configurations
2Productivity
If carrier aggregation is implemented to increase data rates, then throughput is improved, but management complexity and resource allocation difficulty increase
Solution Approach 1:
The patent creates a universal resource allocation mechanism that works across multiple component carriers and logical channels simultaneously. The same priority-based allocation logic is applied universally across all carriers and channels, providing a multi-functional solution that handles carrier aggregation without requiring separate management procedures for each carrier, thereby reducing overall management complexity
Solution Approach 2:
The patent introduces a new dimension of organization by mapping logical channels to uplink grants based on priority levels rather than simply mapping carriers to resources. This dimensional approach to resource allocation allows the system to manage multiple carriers more efficiently by adding a priority-based organizational layer that simplifies the complexity of carrier aggregation management
3Productivity
If uplink grants are allocated to multiple logical channels, then resource utilization is improved, but allocation complexity and processing overhead increase
Solution Approach 1:
The patent applies local quality by assigning different priority levels to different logical channels and allocating uplink grants accordingly. Each logical channel receives appropriate resource allocation based on its specific quality requirements and priority level, allowing high-priority channels to receive resources first while lower-priority channels utilize remaining resources. This localized quality-based approach improves overall resource utilization without requiring complex global optimization algorithms
Solution Approach 2:
The patent changes the allocation parameter from uniform distribution to priority-based distribution. By introducing priority levels as a key parameter and changing how grants are allocated based on this parameter, the system achieves better resource utilization across multiple logical channels. The MAC entity processes grants by evaluating priority parameters rather than using simple round-robin or proportional allocation, improving efficiency while keeping processing rules relatively simple
Data Source
AI summary
A wireless device receives configuration parameters. The configuration parameters indicate: a mapping restriction indicating that a logical channel is mapped to an unlicensed resource type and a licensed resource type; and a prioritized bit rate of the logical channel. The wireless device receives: first uplink grants of the unlicensed resource type; and second uplink grants of the licensed resource type. First unlicensed resources within the first uplink grants are allocated to the logical channel. Second licensed resources within the second uplink grants are allocated to the logical channel based on a difference between the allocated first unlicensed resources and the prioritized bit rate of the logical channel. The wireless device transmits transport blocks corresponding to the first uplink grants and the second uplink grants.