Physical Broadcast Channel Tracking via Predictable Spare-Bit Changes
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately tracking communication parameters due to unpredictable changes in spare and reserved bits of the physical broadcast channel (PBCH) payload, leading to unreliable information and inefficient resource use.
Innovation Solution
Implementing techniques that constrain spare and reserved bits in the PBCH payload to change predictably, either statically, semi-statically, or at periodic boundaries, allowing user equipment (UE) to re-encode and track changes, thereby improving tracking procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If spare and reserved bits in PBCH payload are allowed to change freely, then the system maintains flexibility and adaptability, but tracking reliability deteriorates due to unpredictable changes
Solution Approach 1:
The patent applies dynamics by allowing the PBCH payload to change between SSB occasions while introducing predictable patterns through the tracking procedure. The payload is permitted to vary (maintaining adaptability) but the changes follow a systematic approach where the UE can track and compensate for variations, resolving the contradiction between flexibility and reliability.
Solution Approach 2:
The patent utilizes parameter changes by systematically modifying the PBCH payload between SSB occasions and enabling the UE to track these changes. The payload parameters are allowed to vary while the tracking procedure monitors and compensates for these variations, maintaining both adaptability and tracking reliability.
2Measurement precision
If the UE decodes PBCH payload at every SSB occasion to track changes, then tracking precision is improved, but resource consumption and processing complexity increase
Solution Approach 1:
The patent applies preliminary action by having the UE store a copy of the previously decoded PBCH payload and use it as a reference for tracking changes. Instead of fully re-decoding at every occasion, the UE compares the current payload against the stored reference, reducing processing complexity while maintaining tracking precision through the comparison mechanism.
Solution Approach 2:
The patent utilizes copying by creating and storing a reference copy of the previously decoded PBCH payload. This copied reference is then used for comparison with subsequent payloads to detect changes, reducing the need for complete re-decoding operations and thereby lowering processing complexity while preserving tracking accuracy.
3Loss of information
If the UE performs full decoding of PBCH payload at each SSB occasion, then information accuracy is improved, but time consumption and processing delay increase
Solution Approach 1:
The patent applies preliminary action by pre-storing the previously decoded payload as a reference before new transmissions arrive. When a new PBCH payload is received, the UE compares it against the pre-stored reference to identify changes, avoiding the need for complete re-decoding and thereby reducing processing time while maintaining information accuracy through systematic comparison.
Solution Approach 2:
The patent utilizes partial action by performing only the necessary comparison operations against the stored reference rather than executing a full decoding process at every SSB occasion. This partial approach focuses computational resources on detecting changes rather than re-processing the entire payload, reducing time consumption while preserving the accuracy needed for tracking.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may decode a first signal received over a broadcast channel during a first synchronization signal block (SSB) occasion to identify a first payload, and determine one or more expected changes between the first payload and a second payload of a second signal expected to be received over the broadcast channel during a second SSB occasion. The UE may update the first payload with the one or more expected changes to determine an updated first payload, and encode the updated first payload as an updated first signal. The UE may receive the second signal over the broadcast channel during the second SSB occasion, and apply the second signal and the updated first signal to a tracking procedure for the UE.