SSB Indication Consistency in 5G Resource Allocation
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Solution Overview
Problem
In the 5G mobile communications system, inconsistencies in indicating actually transmitted SSBs by network devices using RMSI and RRC signaling lead to different understandings among terminals in various states, causing resource waste and increased complexity in system resource configuration.
Innovation Solution
A transmission resource indication method is introduced, where auxiliary information is sent in a preset format to terminals to consistently indicate the actually transmitted SSBs and their association with target physical channels, ensuring terminals in different states have a unified understanding of resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the network device uses RMSI to indicate time domain position information of SSBs using group bitmap and bitmap in group, then the indication covers all SSBs in the burst set, but terminals in idle state and connected state may have different understandings of actually transmitted SSBs
Solution Approach 1:
The patent introduces a new indication field in RRC signaling that acts as an intermediary to override or clarify the RMSI indication. This intermediary mechanism ensures that both idle and connected state terminals receive consistent information about actually transmitted SSBs, resolving the inconsistency without requiring complex multi-layer indication systems
Solution Approach 2:
Instead of having terminals interpret different indication methods (group bitmap in RMSI vs. full bitmap in RRC) differently based on their state, the patent inverts the approach by ensuring RRC signaling provides the authoritative indication that both states should follow, reversing the traditional state-dependent interpretation model
2Adaptability or versatility
If different indication methods are used for terminals in different states, then each terminal type receives appropriate information, but resource allocation understanding becomes inconsistent across terminal states
Solution Approach 1:
The patent makes the RRC indication field serve multiple functions: it provides SSB indication for connected state terminals while also serving as the authoritative indication for idle state terminals. This universal indication mechanism ensures reliability across different terminal states while maintaining adaptability through the flexible RRC signaling structure
3Measurement precision
If full bitmap is used in RRC signaling to indicate actually transmitted SSBs, then precise indication is provided to connected state terminals, but resource waste occurs due to inconsistent interpretation by idle state terminals
Solution Approach 1:
The patent implements a feedback mechanism where the RRC signaling provides precise SSB indication that connected state terminals can use immediately, while idle state terminals also receive this precise indication through the same channel. This eliminates the need for idle terminals to waste resources processing incomplete or ambiguous group bitmap indications
Data Source
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AI summary
A transmission resource indication method, a network device, and a terminal are provided in this disclosure. The transmission resource indication method includes: sending auxiliary information that satisfies a preset format, where the auxiliary information is used to indicate a first synchronization signal block SSB that is actually sent and a second SSB associated with a target physical channel.