Burst Code Stream Data Phase Recovery via Dynamic Bandwidth Adjustment
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Solution Overview
Problem
Existing clock and data recovery (CDR) systems for high-speed serial buses, particularly in XGS-PON protocols, face challenges in achieving stable locking within specified time frames for burst data transmissions due to the need for increased bandwidth, which compromises link stability.
Innovation Solution
A data phase recovery method that temporarily increases data transmission bandwidth during burst transmissions to facilitate fast locking of the CDR, followed by a reduction in bandwidth to maintain link stability and meet locking time requirements, utilizing a combination of fast locking and slow tracking mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If data transmission bandwidth is increased to achieve fast locking within specified time, then locking speed is improved, but link stability deteriorates
Solution Approach 1:
The patent applies dynamics by making the bandwidth adjustable rather than fixed. The system dynamically switches between a first bandwidth (higher) for fast locking and a second bandwidth (lower) for stable tracking. This resolves the contradiction by allowing the system to have high bandwidth temporarily when needed for fast acquisition, then transition to low bandwidth for long-term stability, thus achieving both fast locking and link stability at different stages of operation
Solution Approach 2:
The patent implements periodic action through two distinct operational phases: a fast locking phase with higher bandwidth and a stable tracking phase with lower bandwidth. The system periodically switches between these phases based on locking status, using the higher bandwidth only when needed for initial acquisition and then transitioning to lower bandwidth for continuous operation. This periodic switching resolves the contradiction by limiting high bandwidth usage to specific time periods rather than continuous operation
2Speed
If data transmission bandwidth is increased to achieve fast locking, then locking speed is improved, but data transmission stability deteriorates
Solution Approach 1:
The system dynamically adjusts bandwidth based on operational phase, using high bandwidth only during the fast locking phase when speed is critical, and switching to low bandwidth during the stable tracking phase when transmission stability is paramount. This dynamic adjustment resolves the contradiction by matching bandwidth level to operational requirements at each stage
Solution Approach 2:
The patent applies preliminary action by using the higher bandwidth only during the initial fast locking phase to quickly acquire the signal, and then switching to lower bandwidth for the subsequent stable tracking phase. The high bandwidth is used preliminarily and temporarily only when needed for initial acquisition, after which the system transitions to a more stable configuration for ongoing operation
Data Source
AI summary
The present application provides a data phase recovery method, system, device and storage medium for burst code stream. The method includes: in case of detecting that data burst transmission occurs on a target peer device and detecting that a data pause signal is in an invalid state, increasing a data transmission bandwidth within a preset time specified in a transmission protocol, until a clock and data recovery (CDR) completes data locking; reducing the increased data transmission bandwidth after detecting that the CDR completes data locking. In the embodiment of the present application, by combining fast locking and slow tracking, the data transmission bandwidth is only increased within the preset time specified in the protocol, rather than continuously increasing the bandwidth, which will not have a significant impact on the stability of the link.