SC-PTM Scheduling via Group RNTI for Power-Efficient Wireless Transmission
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Solution Overview
Problem
In wireless telecommunication systems, single cell point-to-multipoint (SC-PTM) transmissions face challenges in efficiently managing radio resources and conserving UE power, especially for idle and connected UEs, as they need to continuously monitor the physical downlink control channel (PDCCH) for potential SC-PTM transmissions, leading to unnecessary power consumption.
Innovation Solution
The method involves scheduling SC-PTM transmissions using a Group RNTI (G-RNTI) to provide UEs with specific scheduling information, allowing them to monitor only during predefined transmission instances and enter low power mode otherwise, reducing unnecessary power consumption and optimizing radio resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs continuously monitor PDCCH for SC-PTM transmissions, then transmission reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) cycles where UEs alternately monitor and sleep for PDCCH. During active DRX periods, UEs monitor PDCCH for SC-PTM transmissions; during sleep periods, they enter low-power mode. This periodic monitoring pattern maintains transmission reliability during active periods while significantly reducing average power consumption compared to continuous monitoring.
2Productivity
If SC-PTM uses PRB allocation for radio resource optimization, then radio resource efficiency is improved, but scheduling complexity increases
Solution Approach 1:
The patent applies semi-persistent scheduling where the network pre-allocates physical resource blocks (PRBs) for SC-PTM transmissions in advance. Instead of dynamically allocating resources for each transmission, the network configures PRB allocations beforehand, reducing real-time scheduling complexity while maintaining radio resource efficiency through dedicated resource blocks for multicast traffic.
Data Source
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AI summary
A method for scheduling a service in a wireless telecommunication network in a point-to-multipoint transmission for multiple user equipment devices within a cell of the network, respective ones of the user equipment devices being in a radio resource control connected state or idle state, the method comprising providing scheduling information for the service to at least one of the respective ones of the user equipment devices as part of or together with a radio network temporary identifier transmitted over a control channel of the network, the scheduling information comprising at least one predefined subsequent scheduling instance of the service.