RMSI-to-SSB Offset Indication for High-SCS FR2x Networks
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Solution Overview
Problem
The existing methods for determining offset indication in communication systems are insufficient for frequency ranges beyond FR2 due to the limited number of bits available for indicating the offset of remaining minimum system information (RMSI) with respect to the synchronization signal block (SSB), as the subcarrier spacing (SCS) of RMSI exceeds 120 KHz, leading to an inability to indicate the number of offset resource elements (REs) accurately.
Innovation Solution
A method and apparatus for determining an offset indication that involves determining a target association relationship between the value of offset indication information kssb and the number of corresponding offset REs, allowing the use of 4 bits to indicate a maximum possible number of offset REs without expanding the number of bits, by using a predetermined association relationship based on subcarrier spacing ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the subcarrier spacing of RMSI is increased to meet FR2x frequency range requirements, then the communication frequency range is extended, but the number of bits available for indicating offset REs becomes insufficient
Solution Approach 1:
The patent changes the interpretation parameter of kssb from direct RE offset to RB-based offset indication. By redefining what kssb represents (from RE offset to RB offset), the system can indicate larger offset values using the same 4-bit field, enabling support for FR2x frequency ranges while maintaining adequate offset indication capability.
Solution Approach 2:
The patent transitions from indicating offset in one dimension (REs) to indicating offset in another dimension (RBs). This dimensional change allows the same bit field to represent different granularities of offset, where 1 RB = 12 REs, thus extending the representable offset range without increasing bit width.
2Device complexity
If 4 bits are used for kssb indication, then the SSB structure is maintained, but the maximum offset REs that can be indicated is limited to 11
Solution Approach 1:
The patent reinterprets the parameter represented by kssb, changing it from RE offset to RB offset. This parameter change allows the existing 4-bit field to cover a larger offset range (up to 11 RBs = 132 REs) while maintaining the original SSB structure and bit allocation.
Solution Approach 2:
The patent introduces RB as an intermediary unit between SSB and RMSI offset indication. Instead of directly indicating RE offset, the system uses RB as a mediator (1 RB = 12 REs), allowing indirect representation of larger offset values within the 4-bit constraint.
3Quantity of substance
If the offset of RMSI with respect to SSB exceeds 11 REs, then the indication range is extended, but the existing kssb encoding becomes insufficient
Solution Approach 1:
The patent changes the unit of offset measurement from REs to RBs for the kssb parameter. This parameter change expands the effective indication range from 0-11 REs to 0-11 RBs (equivalent to 0-132 REs), solving the insufficiency of the existing encoding while maintaining backward compatibility.
Solution Approach 2:
The patent makes the kssb field universal by enabling it to represent different offset scales depending on the frequency range. The same 4-bit field can indicate offsets in REs for lower frequency ranges or in RBs for higher frequency ranges (FR2x), providing multi-functional capability.
Data Source
AI summary
A method of determining an offset indication includes: determining an offset of remaining minimum system information (RMSI) with respect to a synchronization signal block (SSB); determining a target association relationship between a value of offset indication information kssb and a number of corresponding offset resource elements (REs); and determining a target kssb based on the target association relationship and the offset.