CORESET Configuration via PBCH Signaling
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Solution Overview
Problem
The existing 3GPP LTE/LTE-A systems face inefficiencies in transmitting and receiving PDCCH scheduling system information, particularly due to limited signaling overhead in PBCH, which affects the accuracy and efficiency of CORESET configuration in wireless communication systems.
Innovation Solution
A method is proposed where the user equipment assumes fixed values for part of the CORESET configuration parameters not indicated by PBCH, allowing for more efficient and accurate transmission/reception of PDCCH scheduling system information via PBCH-based CORESET without increasing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PBCH signaling overhead is increased to provide complete CORESET configuration parameters, then configuration accuracy is improved, but signaling overhead capacity is exceeded
Solution Approach 1:
The CORESET configuration parameters are segmented into two groups: essential parameters that are signaled through PBCH and optional parameters that are fixed or derived. This segmentation allows the limited PBCH signaling resources to be allocated efficiently to the most critical parameters while avoiding overflow of the signaling overhead capacity.
Solution Approach 2:
Different parameters of the CORESET configuration are assigned different qualities of signaling treatment. Essential parameters receive explicit signaling through PBCH to ensure accuracy, while less critical parameters are assigned fixed values or derived through rules, optimizing the use of limited signaling overhead resources.
2Reliability
If all CORESET parameters are explicitly signaled through PBCH, then configuration reliability is improved, but PBCH capacity is exceeded
Solution Approach 1:
Fixed values and derivation rules for optional CORESET parameters are predetermined and stored in the UE before PBCH reception. This preliminary preparation ensures that when the UE receives the PBCH, it can immediately reconstruct the complete CORESET configuration with high reliability using the signaled essential parameters combined with the pre-known fixed values.
Solution Approach 2:
The UE is empowered to self-determine certain CORESET parameters by applying fixed values and derivation rules locally, without requiring explicit signaling from the network. This self-service mechanism maintains configuration reliability while significantly reducing the signaling overhead burden on the PBCH.
Data Source
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AI summary
A user equipment, according to one embodiment of the present invention, monitors candidates of a control channel which schedules system information in a configured specific CORESET based on a PBCH signal, obtains the system information scheduled by the control channel, and obtain a only part of entire parameters for configuring the specific CORESET from the PBCH signal. In this case, the user equipment can monitor the candidates of the control channel by assuming that remaining parameters for configuring the specific CORESET not obtained through the PBCH signal are fixed as follows a size of 1 REG bundle is fixed to 6 REGs, a CCE-to-REG mapping type is fixed to interleaving, a row size of an interleaver for interleaving is fixed to 2, and a precoder granularity which is a unit of the same precoding assumption is fixed to 1 REG bundle.