MIB Decoding via SSB Time Delay Inference
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Solution Overview
Problem
In 5G New Radio (NR) systems, decoding master information blocks (MIBs) is challenging due to the need to decode entire synchronization signal blocks (SSBs), which is resource-intensive and error-prone, especially when multiple SSBs are received by different receiver beams, requiring improved methods for error checking and decoding accuracy.
Innovation Solution
The system determines the time delay between received SSBs to decode index values without requiring the user equipment (UE) to decode the entire signal, using inferred bit values for error checking and improving the accuracy of polar decoders by providing additional reference bit values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE decodes the entire transmitted signal to obtain MIB, then the decoding is complete and accurate, but the computational complexity and resource consumption increase significantly
Solution Approach 1:
The patent extracts only the necessary index value information from the SSB signals rather than decoding the entire transmitted signal. The UE determines time delays between received SSBs and uses these delays to infer index values, obtaining the required MIB information with reduced computational complexity while maintaining decoding accuracy.
Solution Approach 2:
The patent applies partial action by performing only the minimal necessary operations to obtain MIB. Instead of fully decoding all SSB signals, the UE measures time delays and infers index values, which is a partial approach that achieves the goal with less computational effort while still providing complete MIB information.
2Reliability
If the UE receives multiple SSBs from different receiver beams, then the signal reception coverage is improved, but the error checking and decoding becomes more challenging
Solution Approach 1:
The patent uses feedback through time delay measurements. The UE measures the time delays between received SSBs from different beams and uses these measurements to infer index values. This feedback mechanism allows the UE to handle multiple beam receptions systematically, reducing error checking complexity while maintaining improved signal reception coverage.
3Loss of information
If the UE decodes the entire SSB signal, then all information is obtained, but the time and computational resources are wasted
Solution Approach 1:
The patent extracts only the essential index value information needed for MIB decoding from the SSB signals. By measuring time delays between SSBs and inferring index values, the UE obtains complete necessary information without the time cost of decoding entire signals, thus preventing information loss while reducing time consumption.
Solution Approach 2:
The patent performs partial decoding actions - measuring time delays and inferring index values - which is sufficient to obtain MIB information without the excessive time requirement of full signal decoding. This partial approach maintains information completeness while significantly reducing decoding time.
Data Source
AI summary
Methods, systems, and computer-readable mediums are configured to perform operations including detecting a plurality of synchronization signal blocks (SSBs) that are transmitted for a physical broadcast channel (PBCH), each of the SSBs having a SSB index comprising a set of bit values; detecting, from the plurality of SSBs, a first SSB received at a first time and a second SSB received at a second time that is different from the first time; decoding, for a first SSB of the plurality, first bit values of a first SSB index representing the first SSB and of a second SSB index representing the second SSB; determining, based on the first time and the second time, a receive time gap between the first SSB and the second SSB; and determining, based on the receive time gap and the first bit values of the first SSB index and the second SSB index, at least a second bit value of the first second SSB index representing the first SSB and the second SSB representing the second SSB.