PUCCH Resource Selection Before RRC Configuration
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently selecting Physical Uplink Control Channel (PUCCH) resources before dedicated Radio Resource Control (RRC) configuration, particularly due to limitations in the PUCCH resource indicator field which only allows selection of one out of eight resources with three bits, and additional bits are not always explicitly provided for PDCCH aggregation level of 16.
Innovation Solution
Implementing a mathematical function that uses the PDCCH candidate number to provide additional bit values for PUCCH resource configuration, allowing selection from a cardinality-8 subset of 16 PUCCH resources, and re-purposing bits from other DCI fields to enhance resource selection, especially for PDCCH aggregation level of 16 and below.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a three-bit PUCCH resource indicator field is used, then the device complexity is reduced and ease of operation is improved, but the quantity of selectable PUCCH resources is limited to 8 out of 16
Solution Approach 1:
The patent introduces a new dimension for resource selection by utilizing the PDCCH aggregation level parameter. Instead of only using the three-bit indicator field (0-7), the system now combines this with the aggregation level information to access a broader resource space (0-15). This dimensional expansion allows the same three-bit field to effectively select from 16 resources by interpreting its value in conjunction with the aggregation level context.
2Quantity of substance
If 16 PUCCH resources are configured in SIB1, then the quantity of available resources is increased, but the difficulty of detecting and measuring the correct resource increases without additional indication bits
Solution Approach 1:
The patent uses the PDCCH aggregation level as an intermediary parameter that bridges the gap between the limited three-bit indicator and the expanded 16-resource configuration. The aggregation level, already present in the system for other purposes, serves as an additional selector dimension that helps the wireless device identify the correct PUCCH resource without requiring extra indication bits.
3Measurement precision
If explicit additional bits are provided for PUCCH resource selection, then the precision of resource selection is improved, but the device complexity and message overhead increase
Solution Approach 1:
The patent makes the existing PDCCH aggregation level parameter multi-functional. Originally used for controlling PDCCH monitoring behavior, it now also serves as an additional selector for PUCCH resource identification. This universal usage eliminates the need for separate indication bits while maintaining precise resource selection capability.
Data Source
AI summary
A method, system and apparatus are disclosed. A network node configured to communicate with a wireless device (WD) is provided. The network node is configured to, and/or comprising a radio interface and/or comprising processing circuitry configured to determine a resource configuration for PUCCH resource allocation for a wireless device, and provide the configuration to the wireless device for PUCCH resource selection before establishing a dedicated radio resource control configuration based on the resource configuration.