PDCP Version Indication in Dual Connectivity
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Solution Overview
Problem
In cellular communication networks, especially in scenarios with high demand for mobile services and data rates, challenges arise in ensuring reliable and efficient exchange of control and performance information between base stations and mobile devices, particularly in dual connectivity arrangements.
Innovation Solution
The implementation of advanced communication protocols and circuitry configurations, such as NR PDCP, to enable efficient communication and data processing in 5G and NR networks, allowing for seamless switching between LTE and NR modes, and optimizing resource allocation and bearer configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dual connectivity arrangements are implemented to increase network capacity and data rates, then network capacity and throughput are improved, but control information exchange complexity and signaling delays increase
Solution Approach 1:
The patent introduces a version indication mechanism as an intermediary element in the PDCP protocol. This intermediary carries version information that enables both LTE and NR base stations to correctly interpret PDCP packets without requiring complex per-packet negotiation, thus resolving the control information exchange complexity while maintaining dual connectivity benefits
Solution Approach 2:
The patent applies preliminary action by embedding version information in the PDCP header before packet transmission. This allows the receiving end to pre-configure the appropriate PDCP version interpretation, avoiding real-time decision complexity and reducing signaling delays during dual connectivity operation
2Adaptability or versatility
If seamless switching between LTE and NR modes is enabled, then user experience and service continuity are improved, but protocol complexity and processing overhead increase
Solution Approach 1:
The patent uses parameter changes by modifying the PDCP protocol to include version indication fields that change based on the active connectivity mode. This allows the system to adapt between LTE and NR modes through simple parameter adjustments rather than complex protocol transformations, reducing processing overhead while maintaining seamless switching capability
3Adaptability or versatility
If PDCP version compatibility is maintained across LTE and NR networks, then interoperability is improved, but protocol design complexity increases
Solution Approach 1:
The patent applies segmentation by separating the PDCP protocol into version-specific and version-agnostic components. The version indication field segments the protocol handling, allowing different PDCP versions to coexist with clear demarcation, thereby maintaining compatibility across LTE and NR networks while managing protocol design complexity through structured organization
Data Source
AI summary
Embodiments of a User Equipment (UE), Evolved Node-B (eNB) and methods of communication are generally described herein. The UE may receive a SystemInformationBlockType1 from an eNB. The UE may determine that the eNB supports Fifth Generation Core (5GC) operation if the SysteminformationBlocklType1 message includes a plmn-Identity-5GC-r15 parameter. The UE may transmit a radio resource control (RRC) connection request message to establish an RRC connection. If it is determined that the eNB supports 5GC operation, and if the UE supports 5GC operation, the UE may encode the RRC connection request message in accordance with a default new radio packet data convergence protocol (NR PDCP) configuration; and may use NR PDCP for one or more subsequent messages.