Sidelink Communication Resource Allocation via RAT Type Indication
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Solution Overview
Problem
Current mobile communication systems face challenges in efficiently managing resource allocation for sidelink communications, particularly in determining the radio access technology (RAT) type of a sidelink section, which affects resource configuration and leads to increased latency and inefficient resource use.
Innovation Solution
A method where a first user equipment (UE) transmits an indication of the RAT type (3GPP or non-3GPP access) to a base station, allowing the base station to configure appropriate radio resources for sidelink transmission and reception, specifically configuring MAC/RLC/PDCP resources for 3GPP access and PDCP resources only for non-3GPP access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the base station configures resources for sidelink transmission without knowing the RAT type, then resource allocation can proceed, but resource allocation efficiency deteriorates and latency increases
Solution Approach 1:
The UE transmits the RAT type indication to the base station before the base station configures sidelink resources. This preliminary action allows the base station to have advance knowledge of the RAT type (3GPP or non-3GPP access), enabling it to configure appropriate resources (MAC/RLC/PDCP for 3GPP, PDCP only for non-3GPP) without delay, thereby improving resource allocation efficiency and reducing latency
2Productivity
If the base station configures MAC/RLC/PDCP resources for all sidelink transmissions, then resource configuration is simplified, but resource usage efficiency deteriorates for non-3GPP access
Solution Approach 1:
The base station configures different resource sets based on the local characteristic (RAT type) of each sidelink transmission. For 3GPP access, MAC/RLC/PDCP resources are configured; for non-3GPP access, only PDCP resources are configured. This localized adaptation to the specific RAT type requirements optimizes resource usage efficiency while maintaining configuration clarity through standardized procedures
3Manufacturing precision
If the UE does not transmit RAT type indication, then signaling overhead is reduced, but resource configuration accuracy deteriorates
Solution Approach 1:
The RAT type indication is extracted as a separate, dedicated information element (1 bit) within existing uplink signaling messages (RRC signaling or MAC CE). This extraction approach transmits only the essential RAT type information without including unnecessary data, achieving accurate resource configuration while minimizing signaling overhead through efficient information encoding
Data Source
AI summary
A method for performing a sidelink communication through a terminal-to-network relay operation is disclosed. The method performed by a first user equipment (UE) includes transmitting, to a base station, a control message including indication information indicating whether a radio access technology (RAT) type of a radio interface section with a second UE is a 3GPP access or a non-3GPP access; receiving, from the base station, a radio resource for transmitting and receiving a signal with the second UE through the radio interface section; and transmitting and receiving the signal with the second UE based on the received radio resource.