Time Domain Resource Determination for 5G NR Multicast PDSCH
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Solution Overview
Problem
Current 5G New Radio (NR) technologies do not provide a method for determining the time domain location of a Physical Downlink Shared Channel (PDSCH) in multicast/broadcast/multicast transmission scenarios, which limits the efficiency and reliability of broadcast services.
Innovation Solution
A method and apparatus for determining the time domain resource of a PDSCH in a multicast/broadcast/multicast transmission scenario by obtaining a group-radio network temporary identifier (G-RNTI), detecting a downlink control channel, and using associated time domain resource assignment information to determine the time domain location of the PDSCH.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If unicast transmission scheduling methods are used for multicast/broadcast services, then resource allocation flexibility is improved, but transmission reliability deteriorates due to lack of dedicated resource determination methods
Solution Approach 1:
The patent segments the resource allocation mechanism by introducing separate time domain resource assignment information specifically for multicast/broadcast services, distinct from unicast transmission methods. This segmentation allows dedicated resource determination for multicast/broadcast while maintaining unicast flexibility, resolving the contradiction between adaptability and reliability.
Solution Approach 2:
The patent introduces time domain resource assignment information as an intermediary element that mediates between the downlink control channel and the downlink data channel in multicast/broadcast scenarios. This intermediary carries specific resource allocation instructions that ensure reliable transmission while maintaining flexibility.
2Productivity
If multicast/broadcast transmission is implemented without dedicated time domain resource determination, then network resource sharing is improved, but transmission congestion increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring time domain resource assignment information for multicast/broadcast services before actual transmission occurs. This allows the system to proactively allocate resources and avoid congestion during high-traffic periods, maintaining both high resource utilization and smooth transmission flow.
3Adaptability or versatility
If flexible time domain scheduling is used for PDSCH in 5G NR, then service adaptability is improved, but complexity of resource determination increases for multicast/broadcast scenarios
Solution Approach 1:
The patent applies local quality by introducing specific time domain resource assignment information tailored for multicast/broadcast scenarios, rather than using a universal scheduling mechanism. This localized approach maintains the flexibility of 5G NR scheduling while simplifying the determination process for multicast/broadcast by providing dedicated resource allocation rules.
Data Source
AI summary
A time domain resource determining method includes obtaining a group-radio network temporary identifier (G-RNTI). The method also includes detecting a first downlink control channel in a common search space. The G-RNTI is used for scrambling the first downlink control channel. The method further includes obtaining first time domain resource assignment information. There is an association relationship between the first time domain resource assignment information and the G-RNTI. The method additionally includes determining a time domain resource of a first downlink data channel based on the first time domain resource assignment information and the first downlink control channel.