Header Compression Management in Disaggregated RAN Nodes
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Solution Overview
Problem
Current header compression management in Next Generation Radio Access Networks (NG-RAN) faces scalability and flexibility issues due to resource limitations in the User Plane (UP) nodes, leading to desynchronization and redundant signaling between Control Plane (CP) and User Equipment (UE), as UP nodes may not be able to perform header compression despite receiving compression parameters.
Innovation Solution
Implementing a mechanism where the Control Plane node receives status information from the User Plane node regarding its capacity to perform header compression, allowing for dynamic adjustment of compression parameters sent to the UE, ensuring only feasible compression types are enabled based on the UP node's resource availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the gNB CU-CP sends header compression parameters to the UE without checking gNB CU-UP capacity, then the UE is configured with header compression capability, but the gNB CU-UP cannot perform header compression due to resource limitations, resulting in desynchronization
Solution Approach 1:
The gNB CU-UP sends feedback to the gNB CU-CP indicating its capacity to perform header compression. This feedback mechanism allows the control plane to make informed decisions about configuring header compression at the UE, ensuring that compression parameters are only sent when the user plane actually has the resources to execute them, thereby preventing desynchronization.
Solution Approach 2:
The system performs a preliminary check of the gNB CU-UP's header compression capacity before the gNB CU-CP configures header compression at the UE. By checking capacity in advance and only sending compression parameters when capacity is confirmed, the system prevents configuration of compression functionality that cannot be executed, maintaining synchronization between UE and gNB CU-UP.
2Productivity
If the gNB CU-UP performs header compression for multiple UEs, then service coverage is increased, but resource limitations cause overload and inability to perform compression
Solution Approach 1:
The gNB CU-UP dynamically adjusts its header compression capacity based on current resource availability. When resources are abundant, it can serve more UEs with compression. When resources are constrained, it reduces compression operations. This dynamic adjustment is communicated to the gNB CU-CP, which accordingly adjusts UE configurations, allowing the system to scale service coverage while maintaining reliable compression performance.
3Measurement precision
If the gNB CU-CP continuously monitors gNB CU-UP capacity, then header compression configuration accuracy is improved, but signaling overhead and system complexity increase
Solution Approach 1:
The gNB CU-UP autonomously monitors its own header compression capacity and independently sends status updates to the gNB CU-CP when capacity changes. This self-service approach eliminates the need for continuous polling or complex monitoring infrastructure at the control plane, reducing system complexity while maintaining precise capacity awareness for accurate header compression configuration.
Data Source
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AI summary
Certain examples of the present invention relate to header compression in a wireless communication network. Certain examples provide a Control Plane Radio Access Network node, CP-RAN node, of a Central Unit, CU, of a disaggregated RAN node, wherein the CU comprises at least the CP-RAN node and a User Plane, UP, RAN node; the CP-RAN node comprising: means for receiving, from the UP-RAN node, at least one status indicative of the UP-RAN node's capacity to perform at least one respective type of header compression; and means for sending configuration information for the at least one type of header compression to a User Equipment, UE, based in part on the respective at least one status.