RedCap PUCCH Resource Mapping for NR Random Access
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Solution Overview
Problem
In the context of New Radio (NR) systems, terminal devices with Reduced Capability (RedCap) face challenges in efficiently allocating resources for random access due to their lower bandwidth and complexity, leading to issues with receiving and transmitting channels, particularly during the initial access stage where the configured bandwidth may exceed their capabilities, preventing correct channel reception and transmission.
Innovation Solution
A method is introduced to determine a second common PUCCH resource for RedCap terminal devices by adjusting the frequency domain position and offset of the initial UL BWP, ensuring the resource is within the device's supported bandwidth, using predefined rules or network configuration to align the PUCCH resources with the RedCap device's capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional random access resource allocation methods are used, then full bandwidth resources are available for access, but RedCap terminal devices cannot correctly receive and transmit channels due to bandwidth exceeding their capabilities
Solution Approach 1:
The patent applies local quality by configuring specific PUCCH resources within a restricted bandwidth range that is appropriate for RedCap terminal devices. Instead of using the full system bandwidth, the network device allocates PUCCH resources in a localized frequency region that matches the reduced bandwidth capability of RedCap devices, ensuring reliable channel reception and transmission while maintaining adaptability to different device capabilities.
2Productivity
If PUCCH resources are allocated for full bandwidth, then complete coverage is achieved, but RedCap devices with reduced bandwidth cannot access the network
Solution Approach 1:
The patent implements parameter changes by modifying the bandwidth parameter for PUCCH resource allocation specifically for RedCap terminal devices. The network device configures PUCCH resources with bandwidth parameters that are adapted to the reduced capability of RedCap devices, allowing them to successfully perform random access procedures without requiring full system bandwidth support.
3Adaptability or versatility
If standard PUCCH resource configuration is used, then network compatibility is maintained, but RedCap specific bandwidth requirements are not met
Solution Approach 1:
The patent applies segmentation by dividing PUCCH resource configuration into different sets: standard configurations for conventional devices and specialized configurations for RedCap terminal devices. The network device can selectively apply appropriate configurations based on device type, maintaining ease of operation through standardized procedures while achieving adaptability to RedCap specific bandwidth requirements through dedicated resource pools.
Data Source
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AI summary
Disclosed in the present application is a random access resource determining method, comprising: a reduced capability terminal device determines a second common physical uplink control channel resource on the basis of a frequency domain position and a frequency offset of a first common physical uplink control channel resource, the second common physical uplink control channel resource being a resource used for sending hybrid automatic repeat request feedback information in a bandwidth corresponding to the reduced capability terminal device, and the first common physical uplink control channel resource being a resource corresponding to an initial uplink bandwidth part and used for sending the hybrid automatic repeat request feedback information. Also disclosed in the present application are another random access resource determining method, an electronic device and a storage medium.