IP Packet Payload Compression for PDCP Handover Continuity
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Solution Overview
Problem
In wireless communication, existing header compression methods for IP data packets are ineffective for services like Web browsing and email, leading to increased air interface burden without compression, and do not ensure continuity during handovers.
Innovation Solution
A method and apparatus for compressing and decompressing IP data packets using a first compression algorithm, encapsulating the compressed data into PDCP packets with identifier information, and determining the appropriate algorithm for decompression, ensuring efficient resource usage and handover continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If header compression method is used for IP data packets, then air interface resource is saved for packets with large header and small data, but air interface burden increases for services like Web browse and email where header compression is not applicable
Solution Approach 1:
The patent changes the compression target from IP header to IP data payload, and provides multiple compression algorithm options (first compression algorithm, second compression algorithm, third compression algorithm) with different characteristics. This allows adaptive selection of compression methods based on service type and data characteristics, resolving the contradiction between saving air interface resources and maintaining adaptability across different services.
2Productivity
If header compression is applied to IP data packets with repeating headers, then compression efficiency is high, but continuity of compression is lost during handover between base stations
Solution Approach 1:
The patent performs preliminary action by establishing compression context and algorithm selection before handover occurs. The network device maintains compression state information and prepares for seamless transition during handover, ensuring that compression continuity is preserved when users move between base stations, thus maintaining both compression efficiency and handover reliability.
3Adaptability or versatility
If multiple compression algorithms are supported for different service types, then adaptability to various services is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the network device receives feedback information from user equipment about supported compression algorithms and service types. Based on this feedback, the network device selectively determines and notifies the appropriate compression algorithm to use. This feedback-driven approach enables multi-algorithm support with improved adaptability while managing device complexity through intelligent selection rather than universal implementation.
Data Source
AI summary
The present invention discloses a method and an apparatus for compressing and decompressing an IP data packet. The method includes: performing, by a first device, compression processing on IP data in an IP data packet according to a first compression algorithm; and encapsulating, by the first device, the IP data after the compression processing into a packet data convergence protocol (PDCP) data packet, where header information of the PDCP data packet includes identifier information, where the identifier information is used to indicate the first compression algorithm or indicate that the IP data is compressed.