Dynamic eCPRI Header Compression via Learning Index
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Solution Overview
Problem
The increasing bandwidth demands in 5G networks pose challenges for the fronthaul links in cellular wireless networks, necessitating improved solutions for efficient data transmission and header management in enhanced Common Public Radio Interface (eCPRI) systems.
Innovation Solution
The implementation of a method where a first protocol data unit (PDU) with a compressed eCPRI header is transmitted, followed by subsequent PDUs without headers, utilizing a learning index to enable local access and retrieval of headers in the receiving apparatus, optimizing header compression and data transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If eCPRI headers are transmitted with every PDU to ensure complete protocol information, then reliability of data transmission is maintained, but header overhead increases and bandwidth utilization decreases
Solution Approach 1:
The receiving apparatus maintains a local copy (learning index) of previously received eCPRI headers. When a PDU arrives without a header, the receiver retrieves the corresponding header from its local copy using the PDU's payload as a key, eliminating the need to transmit redundant header information while ensuring reliable data transmission.
Solution Approach 2:
The receiving apparatus performs preliminary action by storing eCPRI headers in advance in a learning index. This pre-stored information is then reused for subsequent PDUs, allowing the system to operate with reduced header overhead while maintaining transmission reliability.
2Productivity
If header compression is implemented to reduce bandwidth consumption, then bandwidth utilization improves, but complexity of the transmission system increases due to learning index management
Solution Approach 1:
The receiving apparatus serves itself by maintaining its own learning index of eCPRI headers. Each receiver independently manages its own header cache, eliminating the need for complex centralized header management mechanisms while achieving effective header compression and improved bandwidth utilization.
3Quantity of substance
If PDUs are transmitted without headers to minimize overhead, then bandwidth efficiency increases, but difficulty of detecting and measuring protocol information increases
Solution Approach 1:
The learning index acts as an intermediary between the compressed PDU and the protocol processing layer. It stores the full protocol header information that is otherwise omitted from transmitted PDUs, allowing the system to minimize header overhead while maintaining the ability to detect and measure all necessary protocol information through the intermediary storage mechanism.
Data Source
AI summary
According to an aspect, there is provided a first apparatus for performing the following. The first apparatus transmits a first protocol data unit, PDU, using enhanced common public radio interface, eCPRI, to a second apparatus. The first PDU comprises a first header and, as payload, at least a first label for the first header. Said first label comprises at least a compressed eCPRI header. Following the transmitting of the first PDU, the first apparatus transmits a second PDU without a header using eCPRI to the second apparatus. The second PDU corresponds to the first header and comprises a second label comprising at least said eCPRI header for enabling accessing of the first header locally by the second apparatus.