PDCP Version Configuration in Split RAN Base Stations
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Solution Overview
Problem
Current 5G mobile communication systems can only support a single version of the Packet Data Convergence Protocol (PDCP) in a split RAN structure, limiting the configuration and processing of user data in base stations.
Innovation Solution
A method and apparatus for configuring and supporting multiple versions of PDCP in a communication system, allowing the central unit-control plane to transmit control signals and receive response signals, enabling effective PDCP configuration and processing for data radio bearers in a split RAN structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single version of PDCP is supported in split RAN structure, then device complexity is reduced and ease of operation is improved, but adaptability and versatility are limited
Solution Approach 1:
The base station is segmented into a control plane unit (CU-CP) and a user plane unit (CU-UP), with the PDCP version configuration and control functions separated in the CU-CP, while the CU-UP executes the configured PDCP versions for different data radio bearers. This segmentation allows multiple PDCP versions to be supported without uniformly increasing complexity across the entire base station.
Solution Approach 2:
The CU-CP performs preliminary configuration of PDCP versions before data transmission occurs. By pre-configuring which PDCP versions are supported and assigning them to specific data radio bearers in advance, the system avoids runtime complexity and enables the CU-UP to efficiently process data using the pre-assigned PDCP versions.
2Adaptability or versatility
If multiple PDCP versions are configured for different data radio bearers, then adaptability is improved, but device complexity and difficulty of detecting and measuring increase
Solution Approach 1:
The CU-CP receives feedback from the CU-UP regarding supported PDCP versions and configures appropriate PDCP versions for each data radio bearer based on this feedback. This feedback mechanism ensures that the system maintains accurate knowledge of which PDCP versions are active and where they are applied, reducing the difficulty of detecting and measuring protocol version states.
Solution Approach 2:
The system establishes a standardized interface and configuration protocol between the CU-CP and CU-UP for PDCP version management. By creating an equipotential communication framework with defined messages and procedures, the system simplifies the detection and measurement of PDCP version states across different units, making version management more transparent and measurable.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. More particularly, the disclosure relates to a method performed by a control plane (CP) of a base station in a wireless communication system. The method comprises transmitting, to a user plane (UP) of the base station, a first message comprising information on a packet data convergence protocol (PDCP) for each data radio bearer (DRB). As a response to the first message, the method further comprises receiving, from the UP of the base station, a second message. The information on the PDCP for each DRB comprises at least one PDCP version.