REDCAP Frequency-Domain Resource Switching to Reduce BWP Switch Delays
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Solution Overview
Problem
REDUCAP UEs experience low communication efficiency due to long switch delays in frequency domain resource changes, particularly during BWP switching, which disrupts data transmission and affects communication processes.
Innovation Solution
A method and apparatus that allow REDCAP UEs to determine frequency domain resources through frequency domain resource switching, retuning, or hopping, adapting to current requirements, reducing switch delays by using existing DCI fields or new signaling to indicate the change manner, without RRC reconfiguration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If BWP switching is used to change frequency domain resource for REDCAP UE, then frequency domain resource can be switched to avoid interference or implement load balancing, but switch delay increases and communication efficiency decreases
Solution Approach 1:
The patent changes the parameter of frequency domain resource configuration by introducing a first frequency domain resource and a second frequency domain resource with different bandwidths. The network device dynamically selects which resource to configure based on interference conditions and UE requirements, enabling flexible adaptation without full BWP switching overhead.
Solution Approach 2:
Instead of performing complete BWP switching which involves full parameter reconfiguration, the patent applies partial action by only switching the active frequency domain resource while maintaining other BWP configurations. This partial switching approach reduces the switch delay while still achieving the goal of avoiding interference or balancing load.
2Reliability
If BWP switching is used to change frequency domain resource for REDCAP UE, then frequency domain resource can be switched to avoid interference or implement load balancing, but communication process is affected and communication efficiency decreases
Solution Approach 1:
The network device performs preliminary action by pre-configuring multiple frequency domain resources (first frequency domain resource and second frequency domain resource) with different bandwidths before interference occurs or load balancing is needed. When switching is required, the UE can quickly transition to the pre-configured resource without waiting for full BWP reconfiguration, thus maintaining communication efficiency.
Solution Approach 2:
The patent introduces dynamic selection between different frequency domain resources based on real-time conditions. The network device dynamically determines which resource to activate (first or second frequency domain resource) based on interference levels and UE requirements, enabling adaptive resource management that maintains high communication efficiency while ensuring reliability.
3Reliability
If frequency domain resource switching is performed for REDCAP UE, then interference can be avoided or load balancing can be implemented, but switch delay is longer compared to retuning
Solution Approach 1:
The patent segments the frequency domain resource switching process into two distinct approaches: frequency domain resource switching (for complete resource change) and frequency domain resource retuning (for partial adjustment). By segmenting these functions, the system can select the appropriate method based on the specific scenario, using retuning for quick adjustments and switching for comprehensive resource changes, thereby minimizing overall switch delay.
Data Source
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AI summary
Embodiments of this application disclose a resource determining method and apparatus. The method includes: A terminal device receives first indication information. The first indication information indicates the terminal device to determine a frequency domain resource in a first manner, the first manner includes one of frequency domain resource switching, frequency domain resource retuning, frequency hopping, a manner A, and/or a manner B, the manner A includes the frequency domain resource switching and the frequency hopping, and the manner B includes the frequency domain resource retuning and the frequency hopping. The terminal device communicates with a network device on the determined frequency domain resource. Embodiments of this application help improve communication efficiency.