NR Sidelink TDD Mapping on LTE Carriers for Overlapping Symbols
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Solution Overview
Problem
Existing wireless communication systems face challenges in enabling User Equipments (UEs) to perform NR sidelink communication on LTE TDD carriers efficiently, requiring a method to obtain NR TDD UL-DL configuration based on LTE TDD UL-DL configuration for seamless communication.
Innovation Solution
A method and apparatus for a UE to receive a first TDD UL-DL configuration related to LTE, obtain a second TDD UL-DL configuration for NR sidelink communication, and perform NR sidelink communication on an LTE carrier based on the second configuration, utilizing processors, transceivers, and memories to facilitate communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE performs NR sidelink communication on an LTE TDD carrier, then communication capability is enhanced, but configuration complexity increases due to the need to obtain NR TDD UL-DL configuration based on LTE TDD UL-DL configuration
Solution Approach 1:
The patent applies the copying principle by deriving the NR TDD UL-DL configuration from the existing LTE TDD UL-DL configuration. The UE obtains the NR configuration by copying and adapting the LTE configuration parameters, which simplifies the configuration process while enabling NR sidelink communication on LTE carriers. This approach avoids the need for completely independent NR configuration and reduces the complexity burden.
2Productivity
If the UE utilizes overlapping symbols between LTE and NR configurations, then communication efficiency is improved, but signal interference may increase
Solution Approach 1:
The patent implements continuity of useful action by allowing NR sidelink communication to occur in symbols that overlap between LTE and NR configurations. Instead of leaving gaps or idle periods, the system continuously utilizes the overlapping time resources for productive communication, thereby improving communication efficiency and resource utilization.
Solution Approach 2:
The patent introduces a configuration mapping mechanism as an intermediary between LTE and NR TDD configurations. This intermediary layer manages the overlapping symbols by establishing correspondence relationships between LTE and NR configuration parameters, enabling the system to handle potential signal interference through proper resource allocation and coordination while maintaining continuous communication.
Data Source
AI summary
A method that includes receiving a first time division duplex uplink-downlink (TDD UL-DL) configuration related to LTE, obtaining a second TDD UL-DL configuration related to NR sidelink communication, on the basis of the first TDD UL-DL configuration, and performing the NR sidelink communication with a second apparatus on a carrier related to the LTE, on the basis of the second TDD UL-DL configuration. The first TDD UL-DL configuration may include an UL subframe, a DL subframe, and a special subframe, and the special subframe may include a downlink pilot time slot (Dwpts) symbol, an uplink pilot time slot (Uppts) symbol, and a gap symbol. The NR sidelink communication is allowed for the first device in a first symbol, based on the Uppts symbol and the gap symbol overlapping with the first symbol.