RedCap Channel Validation for Stable Random Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The interaction between lower and higher layers of a Reduced Capability (RedCap) terminal to determine contention resolution failure based on the size of resources occupied by Msg4 or MsgB is unspecified, leading to potential communication failures.
Innovation Solution
The lower layer of the RedCap terminal does not notify the higher layer of the second channel reception or performs an operation to notify the higher layer that the second channel is invalid when the resources exceed the terminal's baseband bandwidth, enabling the higher layer to determine contention resolution failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lower layer notifies the higher layer of second channel reception, then the higher layer can process the received channel information, but unnecessary blind detections occur and random access delay increases
Solution Approach 1:
The lower layer performs preliminary validation of the second channel resources against the terminal's baseband bandwidth capability before notifying the higher layer. This preliminary action prevents the higher layer from performing unnecessary blind detections on channels that the terminal cannot process, thereby reducing random access delay while maintaining reliable contention resolution failure determination.
2Reliability
If the lower layer notifies the higher layer of second channel reception, then the higher layer can process the received channel information, but terminal power consumption increases
Solution Approach 1:
The lower layer performs preliminary validation of the second channel resources against the terminal's baseband bandwidth capability before notifying the higher layer. This preliminary action avoids unnecessary processing in the higher layer, reducing terminal power consumption while ensuring reliable contention resolution failure determination through the first operation.
3Ease of operation
If the lower layer performs first operation to notify the higher layer, then the interaction between layers is specified, but the device complexity increases
Solution Approach 1:
The lower layer performs preliminary validation of the second channel resources against the terminal's baseband bandwidth capability before notifying the higher layer. This preliminary action specifies the layer interaction clearly through a simple validation-and-notify mechanism, avoiding the need for complex interaction protocols while ensuring ease of operation for contention resolution failure determination.
Data Source
Figure 1~4A
Figure 4B~5B
Figure 6~7
AI summary
The present disclosure provides a processing method, an apparatus, a device, and a storage medium. The method comprises: in response to a lower layer of a terminal receiving a second channel for scheduling a first channel, and a resource occupied by the first channel exceeding a first channel baseband bandwidth of the terminal, the lower layer does not inform a higher layer of the terminal that the second channel has been received, or the lower layer performs a first operation for the higher layer, wherein the first operation comprises at least one of the following: informing that the second channel has been received, and informing that the reception of the second channel is an invalid reception. For such scenario "when the terminal determines that a resource occupied by the first channel exceeds a first channel baseband bandwidth of the terminal", the present disclosure provides a method for interaction between a lower layer and a higher layer of a terminal, so that the higher layer of the terminal determines whether the terminal has a contention resolution failure, thereby clearly defining an execution procedure of a random access process, and ensuring stability of random access.