PDCP Control PDU Header Compression for Mobile Systems
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Solution Overview
Problem
In mobile communication systems, transmitting multiple control information types, such as PDCP status reports and header compression feedback, through separate control PDUs increases header size and resource wastage.
Innovation Solution
A method to generate and transmit a single control PDU that includes multiple control information types, utilizing an Extension field to indicate the presence of additional control information, thereby reducing header size and improving resource efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple control information types are transmitted through separate control PDUs, then each control information can be transmitted independently, but the header size increases and resources are wasted
Solution Approach 1:
The patent combines multiple control information types (PDCP status report and header compression feedback) into a single control PDU structure. This merging approach transmits multiple control messages together, reducing the total header overhead compared to sending separate control PDUs for each control information type.
Solution Approach 2:
The control PDU is designed with a universal structure that can carry different types of control information (status reports, header compression feedback, or both) within a single message format. This multi-functional design allows the same PDU structure to serve multiple purposes without requiring separate specialized PDUs.
2Manufacturing precision
If multiple control information types are transmitted through separate control PDUs, then each control information is clearly structured, but transmission efficiency decreases due to increased header size
Solution Approach 1:
The patent merges multiple control information types into a single control PDU with a unified structure. This combination maintains clear organization through defined fields and sub-structures while improving transmission efficiency by eliminating redundant header overhead that would exist if separate control PDUs were used.
Solution Approach 2:
The control PDU employs a nested structure where control information elements are organized within hierarchical levels. The main control PDU contains nested sub-elements for different control information types, allowing clear structural organization while compact representation that improves transmission efficiency.
Data Source
AI summary
A method for transmitting and receiving control data of a PDCP layer, a transmitting apparatus and a receiving apparatus in a mobile communication system are disclosed. Several control information (e.g., information regarding a status report and information about an HC feedback) are simultaneously transmitted through a single control PDU, so the size of headers can be reduced, compared with the case where each control information is transmitted through each control PDU from a transmitting side to a receiving side, thus improving transmission efficiency and efficiency of resources.