Sidelink DRX Scheduling by Service ID for Logical Channel Priority
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing logical channel prioritization (LCP) procedures for data with different Sidelink Discontinuous Reception (SL DRX) configurations, particularly in scenarios involving user equipment (UE) with varying service requirements and latency needs.
Innovation Solution
A method and apparatus for UE operations that prioritize logical channels based on service IDs to determine active times for transmitting Medium Access Control Protocol Data Units (MAC PDUs), allowing for efficient data transmission even when multiple data sets share the same Destination Layer-2 ID but have different SL DRX configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data with different SL DRX configurations are transmitted using the same Destination Layer-2 ID, then resource utilization is improved, but transmission reliability deteriorates due to conflicting active times
Solution Approach 1:
The patent segments the identification mechanism by introducing service IDs as an additional dimension to distinguish data flows. Instead of relying solely on Destination Layer-2 ID, the system now uses a combination of Destination Layer-2 ID and service ID to uniquely identify data, allowing multiple SL DRX configurations to coexist without conflict while sharing the same destination address.
Solution Approach 2:
The patent applies local quality by associating different service IDs with different SL DRX configurations for the same destination. Each service ID acts as a local identifier that carries specific quality attributes (DRX parameters) tailored to the requirements of particular data flows, enabling differentiated handling of data with the same destination but different reliability or latency requirements.
2Quantity of substance
If LCP procedure is performed for all available sidelink data regardless of SL DRX configuration, then data transmission completeness is improved, but transmission timing accuracy deteriorates
Solution Approach 1:
The patent performs preliminary action by determining the active time based on the service ID before executing the LCP procedure. The UE identifies which data belongs to which service ID, determines the corresponding active time in advance, and then performs LCP only for data that will be transmitted during the determined active time. This prevents timing conflicts while ensuring all applicable data is transmitted.
3Adaptability or versatility
If multiple SL DRX configurations are supported for the same destination, then service diversity is improved, but system complexity increases
Solution Approach 1:
The patent introduces service ID as an intermediary element that mediates between the destination and the SL DRX configurations. Instead of directly managing multiple complex configurations for the same destination, the system uses service ID as an intermediate layer that maps to specific DRX configurations, simplifying the management complexity while supporting service diversity.
Data Source
AI summary
A transmission method related to a groupcast of a user equipment (UE) in a wireless communication system includes selecting a destination having a logical channel (LCH) with a highest priority among available sidelink data for transmission, generating a Medium Access Control Protocol Data Unit (MAC PDU) from data related to the destination, and transmitting the MAC PDU at an active time, wherein the data related to the destination is data related to the active time among a plurality of data related to the destination, and the UE determines the data related to the active time among the plurality of data related to the destination based on a service ID.