Terminal Capability Indication for PUCCH Repetition via Random Access
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Solution Overview
Problem
In the new radio (NR) system, network-side devices struggle to determine the capabilities of terminals to support transmission functions like PUCCH repetition, inter-slot frequency hopping, and frequency hopping between two adjacent repetitions, leading to degraded communication performance due to the inability to configure appropriate PUCCH resources, resulting in failed data transmissions.
Innovation Solution
Terminals indicate their capabilities to support PUCCH repetition, inter-slot frequency hopping, or frequency hopping between two adjacent repetitions by transmitting random access information on random access resources, allowing network-side devices to configure appropriate transmission functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a terminal uses a common PUCCH resource for transmission, then the terminal can communicate with the network-side device without dedicated configuration, but the network-side device cannot determine the terminal's capability to support transmission functions like PUCCH repetition and frequency hopping, leading to failed data transmission
Solution Approach 1:
The terminal performs preliminary capability indication by transmitting random access information on random access resources before establishing full communication. This preliminary action allows the network-side device to determine terminal capabilities (PUCCH repetition, inter-slot frequency hopping, frequency hopping between repetitions) in advance, enabling proper configuration of transmission functions before data transmission begins, thus preventing transmission failures.
2Device complexity
If the network-side device does not configure dedicated PUCCH resource for a terminal, then the terminal can use common PUCCH resource, but the network-side device cannot determine terminal capability and cannot configure transmission functions, degrading communication performance
Solution Approach 1:
The terminal provides feedback about its transmission capabilities through random access information transmitted on random access resources. This feedback mechanism enables the network-side device to determine whether the terminal supports PUCCH repetition, inter-slot frequency hopping, or frequency hopping between repetitions, allowing the network to appropriately configure transmission functions and maintain communication performance without requiring complex dedicated PUCCH resource configuration.
3Reliability
If the terminal transmits random access information on random access resource to indicate capability, then the network-side device can determine terminal capability and configure transmission functions, but the terminal must perform additional transmission operations
Solution Approach 1:
The capability indication is merged with the random access information transmission process. The terminal indicates its transmission capabilities (PUCCH repetition, frequency hopping, etc.) by transmitting random access information on random access resources, combining the capability indication function with the existing random access procedure. This approach avoids adding separate complex capability indication mechanisms while still enabling the network-side device to determine terminal capabilities and configure appropriate transmission functions.
Data Source
AI summary
A capability indication method includes transmitting, by a terminal, random access information on a random access resource. A target capability of the terminal is at least indicated by the random access information. The target capability includes a capability to support PUCCH repetition.