Sidelink PDCP Packet Duplication Across Carrier Frequencies
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Solution Overview
Problem
Current communication systems, particularly in the 5G NR environment, lack effective control mechanisms for sidelink communication, which is essential for advanced functions like retransmission control and multicast in Vehicle-to-Everything (V2X) services, leading to inefficiencies in data transmission and reliability.
Innovation Solution
A communication control method that involves receiving configuration information for sidelink packet duplication at user equipment, duplicating Protocol Data Convergence Protocol (PDCP) PDUs, and transmitting them using different carrier frequencies for enhanced reliability and resource allocation in sidelink communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sidelink communication is introduced into NR system without effective control mechanisms, then new communication capabilities are enabled, but data transmission reliability deteriorates
Solution Approach 1:
The patent changes the transmission parameter by using different carrier frequencies for duplicate PDCP PDUs. The network configures multiple carrier frequencies, and the UE transmits duplicate packets on different frequencies to improve reliability while maintaining sidelink communication capability.
Solution Approach 2:
The patent implements packet duplication at the PDCP layer where duplicate PDCP PDUs are created and transmitted through different carriers. This copying mechanism ensures that if one transmission fails, the duplicate can be received, thereby improving reliability.
2Reliability
If packet duplication is implemented at PDCP layer using different carriers, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The UE autonomously performs packet duplication and transmission on different carriers based on network configuration without requiring complex real-time control signaling for each transmission. The device manages its own duplication process using pre-configured parameters.
3Productivity
If multiple carrier frequencies are used for sidelink transmission, then resource allocation efficiency is improved, but loss of information increases
Solution Approach 1:
The network performs preliminary configuration of multiple carrier frequencies and transmission parameters before actual sidelink communication. This advance configuration reduces the need for extensive real-time signaling and minimizes information overhead during active communication.
Data Source
AI summary
A communication control method comprises receiving at a user equipment from a network, configuration information related to sidelink packet duplication; duplicating a PDCP PDU at a PDCP entity of the user equipment; transmitting the PDCP PDU from the user equipment to another user equipment by using a first carrier frequency in sidelink; and transmitting the duplicated PDCP PDU from the user equipment to the another user equipment by using a second carrier frequency in the sidelink, the second carrier frequency being different from the first carrier frequency.