Wireless Communication Resource Allocation With Dynamic Subcarrier Spacing
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Solution Overview
Problem
The challenge in 5G mobile communication systems is to efficiently allocate communication blocks to terminal devices in a way that meets requirements of high speed, high capacity, high reliability, and low latency, while ensuring proper resource allocation in a very short time.
Innovation Solution
A wireless communication system that includes a communication device, a control device, and an allocation determination device, which generates allocation information for communication blocks specified by position in frequency and time directions, using subcarrier spacing, orthogonal modulation schemes, and massive MIMO, to optimize resource allocation for terminal devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station performs comprehensive resource allocation for all terminal devices, then the communication reliability and efficiency are improved, but the allocation time increases and latency increases
Solution Approach 1:
The patent divides the resource allocation process into two distinct phases: (1) a first allocation process that assigns communication blocks to terminal devices, and (2) a second allocation process that assigns communication blocks to communication units within selected terminal devices. This segmentation allows the base station to perform only the first allocation process for a subset of terminal devices in each scheduling cycle, reducing overall allocation time while maintaining comprehensive resource management.
Solution Approach 2:
The patent implements preliminary resource allocation by performing the first allocation process in advance for selected terminal devices before the second allocation process. The base station determines which terminal devices will undergo first allocation based on predetermined criteria, and performs this allocation ahead of time. This preliminary action reduces the time required during the main scheduling cycle while ensuring that resources are pre-allocated appropriately.
2Manufacturing precision
If the base station performs resource allocation in a centralized manner for all terminal devices, then resource allocation accuracy is improved, but the processing complexity and time consumption increase
Solution Approach 1:
The patent segments the centralized resource allocation function into two hierarchical levels: (1) base station-level allocation that determines communication blocks for terminal devices, and (2) terminal device-level allocation that assigns communication blocks to internal communication units. This segmentation reduces the computational burden on the base station while maintaining centralized control and allocation accuracy through coordinated two-stage decision-making.
Solution Approach 2:
The base station performs preliminary selection of terminal devices that require first allocation based on predetermined criteria such as communication requirements, channel conditions, and QoS parameters. By pre-identifying which terminal devices need allocation in the current cycle, the base station reduces processing complexity during the main allocation phase while ensuring accurate resource assignment based on current system state.
3Device complexity
If the system uses fixed subcarrier spacing for all communication blocks, then system complexity is reduced, but the adaptability to different communication requirements decreases
Solution Approach 1:
The patent introduces dynamic subcarrier spacing configuration where the subcarrier spacing for communication blocks can be adjusted based on the specific requirements of terminal devices and communication conditions. The base station determines appropriate subcarrier spacing values for different terminal devices during the first allocation process, allowing the system to adapt to varying channel conditions, mobility patterns, and QoS requirements while maintaining a unified allocation framework.
Solution Approach 2:
The system enables parameter changes by allowing subcarrier spacing to vary across different communication blocks and terminal devices. The base station selects from a set of predefined subcarrier spacing values (e.g., 15 kHz, 30 kHz, 60 kHz) based on communication requirements such as latency sensitivity, data rate requirements, and channel coherence time. This parameter flexibility enhances system adaptability without fundamentally changing the resource allocation architecture.
Data Source
AI summary
A wireless communication system can change a subcarrier spacing. The system includes a control device and an allocation determination device. The control device controls wireless communication between the terminal devices and the communication device. The allocation determination device generates allocation information indicating a communication block included in communication blocks, where the allocation information is for at least one of the terminal devices. The control device determines an allocation time for allocating by the allocation determination device. The control device outputs, to the allocation determination device, an allocation request including reference information regarding communication and information regarding the allocation time. The allocation determination device outputs the allocation information regarding the terminal devices to the control device by a reply time before the allocation time using the reference information. The control device performs the allocation process before the allocation time using the allocation information.