Traffic Type Based Scheduling in Wireless Networks
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Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing carrier aggregation, particularly in dynamic modulation and coding schemes, and resource allocation across multiple carriers, leading to suboptimal performance in varying radio conditions.
Innovation Solution
The implementation of advanced physical layer mechanisms, including OFDM technology, dynamic modulation schemes (such as QAM), and semi-persistent scheduling, allows for adaptive resource allocation and efficient use of radio resources across multiple carriers, enhancing communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic modulation and coding schemes are implemented across multiple carriers, then spectral efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments the carrier aggregation system into multiple independent scheduling entities, where each carrier can be scheduled independently with its own modulation and coding scheme. This allows dynamic adaptation to varying radio conditions on each carrier while managing complexity through modular, carrier-specific configuration rather than system-wide complexity
Solution Approach 2:
The patent implements dynamic modulation and coding schemes that can be adjusted in real-time based on radio conditions for each carrier. The system dynamically selects modulation orders (e.g., QPSK, 16-QAM, 64-QAM) and coding rates according to channel quality indicators, enabling spectral efficiency optimization without requiring permanent complex infrastructure
2Loss of time
If semi-persistent scheduling is used for resource allocation, then latency is reduced, but control signaling overhead increases
Solution Approach 1:
The patent implements semi-persistent scheduling where resources are allocated in advance for a predetermined period without requiring continuous scheduling requests. The network configures semi-persistent resources once, and they remain active for multiple transmission opportunities, reducing latency by eliminating repeated scheduling delays while minimizing control signaling to only initial configuration and periodic updates
Solution Approach 2:
The system uses periodic semi-persistent scheduling where resources are allocated at regular intervals based on traffic patterns. This periodic allocation reduces latency for regular traffic flows while control signaling overhead is minimized to only the initial setup and occasional reconfiguration, rather than continuous signaling
3Productivity
If carrier aggregation is implemented to increase bandwidth, then data rate is improved, but resource management complexity increases
Solution Approach 1:
The patent divides the carrier aggregation system into independently manageable component carriers, each with its own resource pool and scheduling parameters. This segmentation allows the system to achieve high data rates through multiple carriers while managing complexity by treating each carrier as a separate, configurable entity with carrier-specific resource allocation rules
Solution Approach 2:
The patent creates a universal resource allocation framework that can be applied across multiple carriers with different characteristics. The same scheduling principles and resource management mechanisms work consistently across FDD and TDD carriers, licensed and unlicensed spectrum, providing a unified approach that simplifies resource management despite the diversity of aggregated carriers
4Productivity
If adaptive resource allocation is implemented across carriers, then communication efficiency is improved, but processing requirements increase
Solution Approach 1:
The patent implements adaptive resource allocation with carrier-specific parameters optimized for local conditions. Each carrier can have its own modulation scheme, coding rate, and resource allocation strategy tailored to its specific radio conditions and traffic requirements. This local optimization improves communication efficiency while avoiding the excessive processing burden of system-wide complex algorithms by keeping adaptation decisions carrier-localized
Data Source
AI summary
A wireless device receives at least one message. The at least one message may comprise: an uplink radio network temporary identifier (RNTI) for a periodic resource allocation, and at least one configuration parameter for the periodic resource allocation. The at least one configuration parameter may comprise: an uplink interval parameter, and at least one first parameter indicating one or more traffic types. A downlink control information (DCI) corresponding to the uplink RNTI may be received. The DCI may indicate activation of the periodic resource allocation. At least one transport block comprising data of the one or more traffic types may be transmitted employing the at least one configuration parameter.