PBCH Payload Decoding Using SS Block Timing Hypotheses
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Solution Overview
Problem
Conventional solutions for acquiring a network in wireless communication systems using synchronization signal blocks are deficient, particularly in millimeter wave frequencies where signal attenuation is high, and existing techniques for decoding and combining codewords in physical broadcast channels are inefficient.
Innovation Solution
The method involves communicating a synchronization signal block index in a physical broadcast channel payload to enable user equipment to synchronize with a base station by combining codewords received in different synchronization signal blocks, using linear encoding and cyclic redundancy checks to determine correct hypotheses and decode metrics, even when codewords have different content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional network acquisition techniques are used in millimeter wave frequencies, then signal transmission can be maintained, but signal attenuation increases due to high frequencies
Solution Approach 1:
The patent combines multiple SS blocks with different beam directions into a single SS block structure. This merging allows the system to transmit synchronization signals in multiple directions simultaneously, overcoming signal attenuation in millimeter wave frequencies by distributing transmission energy across multiple beams while maintaining a compact structure.
Solution Approach 2:
The patent introduces dynamic beamforming capabilities where the base station can adaptively adjust beam directions and widths based on channel conditions. The SS block structure supports dynamic switching between different beam configurations, allowing the system to optimize signal transmission reliability against varying attenuation conditions in real-time.
2Reliability
If beamforming is used to overcome path loss, then signal transmission reliability improves, but system complexity increases due to multiple beams
Solution Approach 1:
The patent segments the beamforming function into a standardized SS block structure that can be independently configured and transmitted. By dividing the overall beam management into discrete SS block units with specific time-frequency resources, the system reduces the complexity of managing multiple beams while maintaining reliable signal transmission through structured beam sweeping and selection.
3Reliability
If synchronization signal blocks are transmitted repetitively on different beams, then network acquisition reliability improves, but transmission time increases
Solution Approach 1:
The patent implements periodic transmission of SS blocks with configurable periods and patterns. By organizing repetitive beam transmissions into structured periodic sequences rather than continuous or ad-hoc transmissions, the system achieves reliable network acquisition across multiple beams while optimizing transmission time through efficient periodic scheduling and resource allocation.
Data Source
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AI summary
A user equipment (UE) receives a first synchronization signal (SS) block including a first codeword and a second SS block including a second codeword. Each codeword is based at least in part on a linear encoding of a physical broadcast channel (PBCH) payload. The PBCH payloads include different timing indicators. The SS blocks are received at different times separated by a time increment. The UE determines, based at least in part on the time increment, one or more hypotheses of combined decoding metrics for the first codeword and the second codeword; decodes the first codeword based on each of at least one hypothesis in the one or more hypotheses. The at least one hypothesis includes a correct hypothesis; the UE determines the first codeword based at least in part on an error detection procedure such as CRC verification performed when decoding the first codeword based at least in part on the correct hypothesis.