Modulation Scheme Signaling in Wireless Resource Allocation
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Solution Overview
Problem
Future wireless communications networks face challenges in efficiently supporting a wide range of devices with diverse data traffic profiles, including low complexity devices for IoT, high-definition video streaming, and autonomous vehicles, due to varying latency and reliability requirements.
Innovation Solution
The implementation of infrastructure equipment with transceiver and controller circuitry that dynamically allocates resources and selects appropriate modulation schemes for each time or frequency division unit/sub-region based on channel conditions, allowing for adaptive waveform generation and efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single modulation scheme is used for the entire resource allocation, then device complexity is reduced, but adaptability to different channel conditions and traffic profiles deteriorates
Solution Approach 1:
The resource allocation is divided into multiple time-divided units (e.g., slots, subframes) and/or frequency-divided sub-regions (e.g., resource blocks, subcarriers). Different modulation schemes are assigned to different segments based on their specific channel conditions and traffic requirements, allowing the system to optimize performance for each segment while managing overall complexity.
Solution Approach 2:
Different modulation schemes are applied to different time-divided units and/or frequency-divided sub-regions within the same resource allocation. This allows the system to tailor the modulation characteristics to local channel conditions and traffic profiles, achieving optimal performance for diverse services such as eMBB, URLLC, and mMTC without requiring a completely separate allocation for each service type.
2Adaptability or versatility
If multiple modulation schemes are defined in a single resource allocation, then adaptability to diverse traffic profiles is improved, but control signalling overhead increases
Solution Approach 1:
The system dynamically selects and applies different modulation schemes for different time-divided units and/or frequency-divided sub-regions based on real-time channel conditions and traffic requirements. This dynamic approach allows the network to efficiently support diverse traffic profiles including eMBB, URLLC, and mMTC while minimizing control signalling overhead through adaptive resource allocation.
3Productivity
If resource allocation is optimized for high data rate applications, then throughput is improved, but reliability for low latency applications deteriorates
Solution Approach 1:
The resource allocation is segmented into multiple time-divided units and/or frequency-divided sub-regions, allowing different portions to be optimized for different performance requirements. High-throughput services can utilize allocations with higher order modulation schemes while low-latency services can be assigned to segments with more robust modulation and shorter transmission durations.
Solution Approach 2:
Different modulation schemes and resource allocation parameters are applied to different time-divided units and/or frequency-divided sub-regions based on the specific requirements of the traffic being transmitted. This allows simultaneous optimization for both high throughput and low latency within the same overall resource allocation structure.
Data Source
AI summary
A infrastructure equipment is provided. The infrastructure equipment forms part of a wireless communications network configured to receive data from a communications device via a communications channel between the infrastructure equipment and the communications device. The infrastructure equipment comprises transceiver circuitry to transmit signals to and to receive signals from the communications device, and controller circuitry. The controller circuitry is configured in combination with the transceiver circuitry to receive first control signalling from the communications device, the first control signalling requesting a resource allocation within which the communications device is to transmit data to the infrastructure equipment, to determine a resource allocation of the communications channel for the communications device to transmit the data to the infrastructure equipment, and to transmit second control signalling to the communications device, the second control signalling comprising an indication of the resource allocation.