Multi-access PDU Session Header Compression via Proxy
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in header compression and decompression processes, particularly in multi-access protocol data units (MA-PDU) sessions using protocols like DCCP/QUIC, leading to increased overhead and reduced performance in header management.
Innovation Solution
The implementation of inner header compression (IHC) and outer header removal (OHR) mechanisms within the DCCP/QUIC layer, along with PDCP-based compression, to optimize header sizes and reduce overhead in MA-PDU sessions, allowing for efficient data transmission between WTRUs and network nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If header compression is applied in MA-PDU sessions, then header sizes are reduced and overhead is decreased, but the complexity of the compression and decompression processes increases
Solution Approach 1:
The patent divides the header compression function into separate network-side components (SMF, UPF) and UE components, with clear interface definitions. The compression configuration is segmented into multiple parameters (HCC, compression method, compression profile) that can be independently managed and optimized, reducing overall system complexity while achieving header compression.
Solution Approach 2:
The patent introduces a proxy as an intermediary component that facilitates header compression between the UE and network nodes. The proxy receives compression configurations from the SMF, manages compression state, and coordinates with the UPF, thereby simplifying the compression process by centralizing control logic in a dedicated intermediary component.
2Adaptability or versatility
If multiple compression methods and profiles are supported, then adaptability is improved, but the difficulty of configuring and managing compression increases
Solution Approach 1:
The patent designs the HCC parameter to universally support multiple compression methods (e.g., ROHC, EHC) and compression profiles through a standardized configuration structure. The same configuration mechanism can accommodate different compression algorithms by simply changing the indicated method and profile parameters, providing multi-functionality without requiring separate configuration systems for each method.
Solution Approach 2:
The patent uses parameter-based configuration where the compression method and profile are specified through changeable parameters in the HCC. This allows the system to adapt to different compression requirements by modifying parameters rather than changing the underlying configuration structure, simplifying management while maintaining versatility.
3Productivity
If header compression is implemented in multi-access sessions, then data transmission efficiency is improved, but the latency in establishing compression context increases
Solution Approach 1:
The patent performs header compression configuration in advance during the PDU session establishment or modification phase. The SMF determines and sends the HCC to the UPF and UE before actual data transmission begins, so that compression context is already established when data flow starts, minimizing setup latency and enabling immediate efficient transmission.
Solution Approach 2:
The patent implements feedback mechanisms where the UE reports supported compression methods and profiles to the network, and the network confirms the selected compression configuration. This feedback loop ensures that both ends have matching compression contexts established efficiently, reducing setup time by avoiding mismatches and reconfiguration.
Data Source
AI summary
Systems, methods, and instrumentalities are disclosed herein for establishing a connection between a network node and a wireless transmit/receive unit (WTRU). A network node (e.g., a user plane function (UPF)) may receive a connection request message from another network node (e.g., a session management function). The connection request may indicate a request to establish a connection between the network node (e.g., the UPF) and a WTRU. The connection request message may indicate a header compression configuration (HCC) supported by a proxy. The network node may receive a request message from the WTRU indicating an HCC supported by the WTRU. The network node may determine a supported HCC using the HCC supported by the proxy and the HCC supported by the WTRU. The network node may configure the proxy to use the supported HCC. The network node may establish a connection with the WTRU.