PDCP Sub-Header Ethernet Field Reuse Indication
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Solution Overview
Problem
Current Long Term Evolution (LTE) and New Radio (NR) protocols do not support Ethernet header compression, which is essential for the Industrial Internet of Things (IoT) project, as the Packet Data Convergence Protocol (PDCP) layer does not perform Ethernet header compression.
Innovation Solution
An Ethernet header compression method and decompression method are introduced, where the PDCP sub-header of PDCP PDUs includes information indicating whether specific Ethernet fields in the headers are reused, allowing for compression and decompression processing at the transmitting and receiving ends, respectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If Ethernet header compression is implemented at the PDCP layer, then header overhead is reduced and network efficiency is improved, but protocol complexity increases and backward compatibility is compromised
Solution Approach 1:
The Ethernet header is segmented into reusable fields and non-reusable fields. The PDCP sub-header includes indication information that specifies which Ethernet header fields are reused and which are transmitted in the data packet. This segmentation allows selective compression while maintaining protocol clarity and reducing overhead.
Solution Approach 2:
The protocol establishes a compression context in advance that stores previously transmitted Ethernet header fields. Before compressing the current packet, the system checks whether fields can be reused based on the compression context, enabling efficient compression without requiring complex real-time decisions.
2Productivity
If Ethernet header compression is implemented, then bandwidth efficiency is improved, but synchronization between compressors and decompressors becomes more difficult to maintain
Solution Approach 1:
The PDCP sub-header includes indication information that provides feedback about which Ethernet header fields are reused and which are transmitted. This feedback mechanism ensures that the receiving end can correctly decompress the packet by knowing exactly which fields need to be reconstructed from the compression context and which are present in the data packet.
Solution Approach 2:
The compression scheme is dynamic and adapts to different packet types and field values. The indication information in the PDCP sub-header allows the system to dynamically determine the compression strategy for each packet, improving synchronization by allowing flexible compression decisions based on actual packet content rather than fixed patterns.
Data Source
AI summary
This disclosure provides an Ethernet header compression method, an Ethernet header decompression method, and a device. The compression method includes: transmitting, by using a transmitting PDCP entity of the transmitting end, a first PDCP PDU corresponding to a first data radio bearer DRB, where when the first DRB is configured with an Ethernet header compression function, the first PDCP PDU includes one or more pieces of first information, and the first information is used to indicate whether a specific Ethernet field in an Ethernet header of a first PDCP SDU corresponding to the first PDCP PDU is reused.