Dynamic Resource Allocation Field Configuration for Multi-Bandwidth Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently supporting multiple system bandwidths for different user equipment (UEs), leading to complexities in resource allocation and compatibility issues between legacy and new UEs.
Innovation Solution
The system employs a flexible resource allocation mechanism where base stations generate control messages with resource allocation fields configured based on selected system bandwidths, allowing for different sizes and interpretations depending on the search space and type of message, enabling seamless communication across various bandwidths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single resource allocation field configuration is used for all system bandwidths, then device complexity is reduced, but adaptability to different bandwidths deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation field configurations that adapt to different system bandwidths. The base station dynamically selects appropriate resource allocation field sizes and interpretations based on the configured system bandwidth, allowing the same control message format to efficiently support multiple bandwidth configurations without requiring separate dedicated formats for each bandwidth size.
Solution Approach 2:
The patent changes key parameters of the resource allocation field including its size in bits and its interpretation rules based on the system bandwidth configuration. For example, the resource allocation field may have different bit lengths (e.g., 15 bits for one bandwidth, 20 bits for another) and different mapping relationships to physical resource blocks depending on which system bandwidth is currently configured, enabling flexible adaptation while maintaining a unified control message structure.
2Adaptability or versatility
If different resource allocation field configurations are used for different system bandwidths, then adaptability improves, but device complexity increases
Solution Approach 1:
The patent creates a universal control message format that can serve multiple system bandwidth configurations through configurable resource allocation fields. The same DCI format structure is used across different bandwidths, with the resource allocation field's size and interpretation being the only variable elements that adapt to the specific bandwidth configuration, thereby achieving multi-functionality without proportionally increasing complexity.
Solution Approach 2:
Instead of creating entirely different control message formats for each bandwidth, the patent only changes specific parameters within the unified format - primarily the resource allocation field size and its mapping rules. This selective parameter change approach allows the system to support multiple bandwidths while minimizing the increase in overall device complexity, as most of the control message structure remains identical across configurations.
3Measurement precision
If resource allocation field size varies with system bandwidth, then measurement precision for resource indication improves, but ease of operation deteriorates
Solution Approach 1:
The UE dynamically adapts its processing of the resource allocation field based on the known system bandwidth configuration. When the UE receives a control message, it uses the pre-configured system bandwidth information to determine the appropriate resource allocation field size and interpretation rules, automatically adjusting its decoding process without requiring additional signaling or manual configuration, thereby maintaining ease of operation despite variable field sizes.
Data Source
AI summary
Techniques for supporting communication with user equipment (UEs) of different types on a plurality of system bandwidths are described. UEs of each type may operate on one or more available system bandwidths. Resources assigned to a UE may be conveyed by a resource allocation field of a control message sent to the UE. The resource allocation field may have different configurations (e.g., different sizes and/or interpretations) for different system bandwidths. In one design, the resource allocation field and the control message sent to the UE have different sizes for the plurality of system bandwidths. A base station may determine the size of the resource allocation field based on a system bandwidth selected for the UE. In another design, the resource allocation field may have a same size but different interpretations (e.g., different resource mappings) for the plurality of system bandwidths.