Adaptive Uplink Grant Selection for 5G Resource Utilization
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Solution Overview
Problem
In wireless communication networks, especially in 5G and NR systems operating in sharable spectrum bands, terminal devices face challenges in achieving multi-antenna gain due to occupied radio resources, leading to inefficiencies in data transmission and energy consumption.
Innovation Solution
The proposed solution involves a method where a terminal device receives multiple UL grants from a network node, allowing it to select the most available resource units for data transmission based on availability and quality, enabling adaptive scheduling and switching between transmitter chains to optimize resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple UL grants are provided to terminal device, then resource utilization and system performance are improved, but device complexity and scheduling overhead increase
Solution Approach 1:
The patent implements dynamic grant selection where the terminal device adaptively chooses among multiple UL grants based on real-time channel conditions and resource availability. The network node dynamically provides multiple grants with different resource allocations, and the terminal device dynamically selects the most suitable grant, making the scheduling system flexible and adaptive rather than static.
Solution Approach 2:
The patent segments the uplink resource allocation into multiple separate UL grants, each granting specific resource units for data transmission. Instead of providing a single comprehensive grant, the network node divides the resource allocation into multiple granular grants, allowing the terminal device to select individual grants based on availability, thereby reducing the risk of complete resource occupation by other devices.
2Reliability
If terminal device uses single UL grant for data transmission, then device complexity is reduced, but reliability deteriorates when scheduled channel is occupied by other devices
Solution Approach 1:
The patent prepares multiple UL grants in advance with different resource unit allocations before data transmission occurs. By having pre-configured alternative grants ready, the terminal device is cushioned against the risk of resource occupation by other devices. If the initially selected grant's resources are occupied, the terminal device can switch to alternative grants without transmission failure.
Solution Approach 2:
The patent changes the parameter of grant selection by allowing the terminal device to vary which UL grant is used based on channel conditions and resource availability. The terminal device monitors the availability of resource units associated with each grant and selects grants dynamically, changing the transmission parameters adaptively to maintain reliability in varying channel conditions.
3Measurement precision
If terminal device performs LBT procedures for all granted resource units, then resource availability accuracy is improved, but energy consumption increases
Solution Approach 1:
The patent applies partial action by having the terminal device perform LBT procedures selectively on only those resource units that are necessary for transmission, rather than exhaustively checking all possible grants. The terminal device performs LBT on resource units associated with selected UL grants, avoiding unnecessary listening procedures for grants that are not chosen, thereby reducing energy consumption while maintaining sufficient detection accuracy.
4Adaptability or versatility
If network node provides two or more UL grants with different resource units, then adaptability and resource utilization are improved, but signaling overhead increases
Solution Approach 1:
The patent makes the UL grant structure universal by designing it to serve multiple functions simultaneously. Each UL grant not only allocates resource units but also includes information for the terminal device to identify and select the grant. The grant structure is multi-functional, providing both resource allocation and selection criteria, thereby reducing the need for separate signaling messages and minimizing overhead while maintaining high adaptability.
Data Source
AI summary
Various embodiments of the present disclosure provide a method for adaptive scheduling and transmission in a communication network. The method comprises receiving two or more uplink grants from a network node to a terminal device. The two or more uplink grants indicate at least granted resource units for the terminal device. The method further comprises selecting an uplink grant from the two or more uplink grants by the terminal device based at least in part on availability of the granted resource units.