Wireless Resource-Metric Association for Grant-Free Low-Latency Access
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Solution Overview
Problem
Existing wireless communication systems face challenges in achieving high spectral efficiency, low latency, and efficient resource allocation without the need for prior control messages, particularly in scenarios with multiple devices and non-deterministic traffic.
Innovation Solution
A receiver is configured to determine resource information and channel metrics from received signals, associating them with transmitter identities without prior knowledge, allowing for efficient communication by eliminating the need for scheduling and control messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If scheduling is used for resource allocation, then resource management is improved, but latency increases due to initial communication procedures
Solution Approach 1:
The patent applies preliminary action by pre-configuring resource pools and pre-establishing association rules between resource information and channel metrics before actual communication occurs. This allows devices to immediately begin data transmission without scheduling delays, as the resource allocation framework is already in place and ready for use.
Solution Approach 2:
The patent extracts the scheduling function from the communication protocol by implementing grant-free access where devices autonomously select resources from pre-defined pools. This removes the scheduling overhead and initial communication procedures while maintaining resource management through the resource information-channel metric association mechanism.
2Reliability
If listen-before-talk is used for medium access, then collision avoidance is improved, but scalability deteriorates as device count increases
Solution Approach 1:
The patent segments the transmission band into multiple resource pools with different characteristics (e.g., different channel conditions, different priority levels). Devices can select from these segmented pools based on their channel metrics, distributing the access load across multiple segments rather than having all devices contend for a single channel, thus improving scalability while maintaining collision avoidance through diverse selection options.
Solution Approach 2:
The patent introduces an additional dimension for resource selection by associating resource information with channel metric information. Instead of single-dimensional time-domain listen-before-talk, devices can select resources based on multi-dimensional criteria including channel quality, resource pool type, and association rules, providing more degrees of freedom for collision avoidance and improving system scalability.
3Productivity
If resource allocation is performed by central coordinator, then resource management is improved, but device complexity increases for transmitters with reduced capabilities
Solution Approach 1:
The patent implements self-service by enabling devices to autonomously determine resource information and associate it with channel metrics without requiring complex receiver capabilities or central coordination. Each device independently performs resource selection and association based on pre-configured rules and measured channel conditions, eliminating the need for sophisticated transmitter-receiver pairs while maintaining efficient resource allocation through the association mechanism.
4Measurement precision
If control messages are exchanged for scheduling, then resource allocation accuracy is improved, but communication overhead increases
Solution Approach 1:
The patent merges the resource allocation function with the data transmission process itself. By associating resource information directly with channel metric information and embedding this association in the data payload, the system eliminates separate control messages for scheduling. The same communication carrier that transports data also conveys resource allocation information, thereby maintaining allocation accuracy while minimizing overhead.
Solution Approach 2:
The patent makes the communication signal multi-functional by enabling it to simultaneously carry data, channel metrics, and resource allocation information through the association mechanism. This universal approach eliminates the need for dedicated control channels or separate scheduling messages, reducing communication overhead while preserving resource allocation accuracy through the integrated information structure.
Data Source
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Figure 3a
AI summary
A receiver configured for receiving a wireless signal comprising a signal transmitted through a channel using resource elements of a wireless communications network comprises a determiner configured for determining a resource information indicating the resource elements and for determining a channel metric of the channel. There receiver comprises an associator configured for associating the resource information with the channel metric using an identity information contained in the signal.