MAC PDU Header Compression via Data Unit Grouping
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Solution Overview
Problem
In 5G mobile communication systems, the large overhead of MAC PDUs due to the inclusion of MAC sub-headers with Logical Channel Identity (LCID) and data length information leads to inefficient data transmission.
Innovation Solution
A data transmission method that generates data packets with a preset format, where header information is generated based on shared attribute information among data units, reducing redundant information by using a single header for multiple data units with the same attributes, and employing identifiers to indicate the inclusion of transmission channel information and data length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each data unit is encapsulated with a complete MAC sub-header containing LCID and data length, then each data unit can be independently identified and processed, but the overhead of the MAC PDU increases significantly
Solution Approach 1:
The patent merges multiple data units with identical attribute information into a single MAC sub-PDU structure. Instead of providing separate MAC sub-headers for each data unit, a single MAC sub-header is used to describe multiple data units, thereby reducing overhead while maintaining identification capability. This is achieved by grouping data units that share common attributes such as LCID and data length.
Solution Approach 2:
The MAC sub-header is designed to serve multiple data units simultaneously. The header fields (LCID, data length, etc.) are configured to represent a group of data units with identical attributes, making the header universal for these units. This multi-functional header reduces redundancy by eliminating the need for duplicate header information for each individual data unit.
2Ease of operation
If redundant attribute information is included in each MAC sub-header, then data processing at the receiving end is simplified, but transmission efficiency decreases due to increased overhead
Solution Approach 1:
The patent combines the header information for multiple data units into a single MAC sub-header structure. By merging redundant attribute information (LCID, data length) that is common across multiple data units, the overhead is reduced while the receiving end can still process data efficiently by understanding the grouped structure and applying the shared header information to all corresponding data units.
Data Source
AI summary
An apparatus, a transmitting end, a receiving end and a system are provided. The method includes: generating a data packet of a preset format according to n data units and attribute information of each data unit, where the attribute information includes transmission channel information and a data length of the each data unit, n≥2; and transmitting the data packet to a receiving end, where the data packet includes header information and the n data units, and at least one piece of the header information is generated according to same information in attribute information of at least two of the data units. Since at least one piece of header information is generated according to the same information in the attribute information of at least two data units, that is, the transmitting end can omit, in the header information, the same information in the attribute information.