RedCap Terminal BWP Configuration for Frequency Band Determination
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Solution Overview
Problem
The configuration of Downlink Bandwidth Part (DL-BWP) and Uplink Bandwidth Part (UL-BWP) for Reduced Capability (RedCap) UE in wireless communication systems is unclear, particularly in IoT devices, which hinders the determination of the frequency band to be used by these terminals.
Innovation Solution
A terminal is provided with a communication unit to receive system information and a control unit that configures a DL-BWP different from that of non-RedCap UE and a UL-BWP different from that of non-RedCap UE, allowing for distinct bandwidth configurations based on system information for transmission, reception, and paging operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If function-reduced terminals (RedCap UE) use the same DL-BWP and UL-BWP as non-RedCap UE, then device complexity is reduced, but the frequency band cannot be properly determined for IoT devices
Solution Approach 1:
The patent segments the bandwidth part configuration into separate DL-BWP and UL-BWP settings for RedCap UE, allowing independent determination of frequency bands for downlink and uplink. This segmentation enables proper frequency band identification for IoT devices while maintaining manageable configuration complexity through structured parameter definitions.
2Loss of information
If RedCap UE configure different DL-BWP and UL-BWP from non-RedCap UE, then frequency band determination is enabled, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by defining specific bandwidth parts (DL-BWP and UL-BWP) with distinct frequency band assignments for RedCap UE. Through parameter-based differentiation (bandwidth size, frequency location), the system enables proper frequency band determination while controlling complexity through standardized parameter structures.
3Ease of operation
If RedCap UE share the same BWP with non-RedCap UE, then ease of operation is improved, but adaptability to different frequency bands is reduced
Solution Approach 1:
The patent introduces dynamic BWP configuration where RedCap UE can be assigned different DL-BWP and UL-BWP settings based on their operational requirements and detected frequency bands. This dynamic adaptation allows the system to maintain ease of operation through automated configuration while achieving frequency band adaptability for diverse IoT applications.
Data Source
AI summary
A terminal includes: a communication unit configured to receive system information; and a control unit configured to configure at least one of: a DL-BWP (Downlink Bandwidth part) that is different from a DL-BWP for a non-RedCap UE (Reduced Capability UE); and a UL-BWP (Uplink Bandwidth part) that is different from a UL-BWP for the non-RedCap UE, based on the system information. The communication unit performs at least one of: transmission or reception related to a random access; transmission or reception in a connected mode; and reception of paging and system information, by using the configured different DL-BWP or the configured different UL-BWP.