eCPRI Front-Haul Prioritization for Low-Latency Packet Delivery
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Solution Overview
Problem
Current eCPRI data transmission methods do not differentiate between data flows with varying latency requirements, leading to overhead and bottlenecks for ultra-low latency and near-real-time applications, reducing network efficiency and capacity.
Innovation Solution
Dynamically assign priorities for eCPRI data packets based on latency classification, using eCPRI RTCID and PCID, and implement encapsulation rules to prioritize high-priority packets, ensuring they are transmitted with minimal delay and without concatenation with lower-priority packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If all eCPRI data packets are transmitted using the same encapsulation process, then the implementation is simple and uniform, but high-priority time-sensitive packets experience delays due to overhead and bottlenecks
Solution Approach 1:
The patent segments eCPRI data packets into different priority categories (time-sensitive and time-tolerant) and applies different encapsulation processes to each category. High-priority packets receive expedited handling with minimal processing overhead, while lower-priority packets undergo standard encapsulation procedures.
Solution Approach 2:
The patent implements dynamic priority assignment for eCPRI packets based on latency classification. The system dynamically determines which packets require urgent transmission and applies appropriate encapsulation rules accordingly, allowing the encapsulation process to adapt to real-time network conditions and packet requirements.
2Productivity
If eCPRI packets are concatenated to maximize bandwidth utilization, then network capacity increases, but processing time increases and latency requirements cannot be met
Solution Approach 1:
The patent segments the data stream into high-priority and low-priority packets, applying different concatenation rules to each segment. High-priority time-sensitive packets are transmitted individually or in small groups to minimize processing time, while lower-priority packets can be concatenated to maximize bandwidth utilization without impacting latency-critical traffic.
Solution Approach 2:
The patent applies different quality characteristics to different portions of the data stream based on their priority classification. High-priority packets receive expedited processing with minimal concatenation, while lower-priority packets undergo more aggressive concatenation to optimize bandwidth usage in specific local contexts of the data flow.
3Speed
If priority-based encapsulation rules are implemented for eCPRI packets, then transmission speed for critical packets improves, but system complexity increases
Solution Approach 1:
The patent performs preliminary classification of eCPRI packets into priority categories before encapsulation. By determining the priority level and assigning appropriate encapsulation rules in advance, the system avoids complex real-time decision-making during the encapsulation process itself, thereby reducing overall system complexity while maintaining high transmission speeds for critical packets.
4Device complexity
If all data packets are treated equally in the transmission queue, then the queue management is simple, but ultra-low latency applications cannot achieve their latency budgets
Solution Approach 1:
The patent segments the transmission queue into multiple priority levels, creating separate queues or priority bands for time-sensitive and time-tolerant packets. This segmentation allows the system to manage different queue types with different rules, ensuring that high-priority packets are transmitted first while maintaining relatively simple management protocols for each segment.
Data Source
AI summary
Low latency communication support via an enhanced front haul interface is presented. An example method comprises receiving within a packet stream a first data packet associated with a time sensitive communication requirement and a second data packet associated with a time tolerant communication requirement, determining that the first data packet is associated with a last hybrid automatic repeat request opportunity within a defined latency budget for transmission to receiver equipment, assigning a high enhanced common public radio interface value to the first data packet, encapsulating using an enhanced common public radio interface encapsulation process, the first data packet to create a first encapsulated data; and using a transport layer network encapsulation process to encapsulate the first encapsulated data to generate a second encapsulated data.