DCI Resource Block Mapping Across Multiple Bandwidth Parts
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Solution Overview
Problem
Modern wireless networks face challenges in efficiently managing diverse traffic types with varying quality of service requirements due to a one-size-fits-all air interface configuration, leading to misinterpretation and inefficiencies in downlink control information (DCI) decoding.
Innovation Solution
A method and apparatus for determining the location of transmission resources in DCI by using a frequency domain resource allocation field to define a starting resource block and length of contiguous allocated resource blocks based on a reference resource block and control resource set, enabling efficient resource utilization and accurate decoding across multiple UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a one-size-fits-all air interface configuration is used, then device complexity is reduced and ease of operation is improved, but adaptability to diverse traffic types deteriorates and misinterpretation of DCI occurs
Solution Approach 1:
The patent applies dynamics by making the air interface configuration adaptable rather than static. Different air interface configurations are selected based on traffic type characteristics and QoS requirements, allowing the system to dynamically adjust parameters such as subcarrier spacing, cyclic prefix length, and resource allocation schemes to match the specific needs of each traffic flow while maintaining straightforward decoding procedures through configuration indication fields in DCI
Solution Approach 2:
The patent changes physical layer parameters based on traffic requirements. By introducing configuration indication fields in DCI that specify air interface parameters (such as subcarrier spacing, resource block allocation, modulation schemes), the system can adapt to diverse traffic types without increasing operational complexity at the UE side, as UEs simply follow the indicated configuration
2Adaptability or versatility
If multiple air interface configurations are supported for diverse traffic types, then adaptability is improved, but device complexity and difficulty of detecting and measuring DCI parameters increases
Solution Approach 1:
The patent applies preliminary action by pre-defining a set of standardized air interface configurations, each optimized for specific traffic types (e.g., eMBB, URLLC, mMTC). These pre-configured parameter sets include subcarrier spacing, cyclic prefix lengths, and resource allocation patterns. When a UE needs to decode DCI, it simply selects from these pre-defined configurations based on indication fields, avoiding the need to process arbitrary complex configurations in real-time
Solution Approach 2:
The patent creates a universal DCI structure that can indicate multiple different air interface configurations through compact configuration indication fields. A single DCI format can serve multiple functions by including fields that specify which pre-defined configuration to use, allowing the same DCI decoding mechanism to handle diverse traffic types without requiring separate decoding procedures for each configuration type
3Reliability
If blind decoding is performed across multiple search spaces, then reliability of DCI detection is improved, but loss of time and processing resources increases
Solution Approach 1:
The patent segments the blind decoding process by organizing search spaces hierarchically with common search spaces containing configurations with fewer possibilities and UE-specific search spaces containing more varied configurations. This segmentation allows UEs to first decode common configurations that apply to multiple UEs, then proceed to UE-specific configurations only if needed, reducing the total number of blind decoding attempts required while maintaining detection reliability
Data Source
AI summary
Methods and apparatus are provided for wireless communication in which a downlink control information (DCI) is transmitted in a physical downlink control channel (PDCCH) in a first bandwidth part (BWP). A UE is responsible for determining a starting resource block (RB) for a data transmission allocated by the DCI based on a value of a frequency domain resource allocation field in the DCI, a reference RB, and a reference size of a second BWP. The data transmission can then be transmitted, in the case of, for example, PUSCH, by a UE or received, in the case of, for example, PDSCH.