RNC Relocation via Coding Scheme Reconfiguration
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Solution Overview
Problem
In the context of universal mobile telecommunications systems, the relocation of user equipment (UE) between radio network controllers (RNCs) is hindered when the coding schemes of the source and target RNCs are inconsistent, leading to failed UE-not-involved RNC relocation processes, especially when radio links of circuit-switched domain services are under the control of the target RNC.
Innovation Solution
The method involves sending a transparent container from the target RNC to the source RNC with a reconfiguration message to change the UE's coding scheme, allowing the UE to be successfully relocated by reconfiguring its coding scheme to match the target RNC's scheme, either through a UE-not-involved or UE-involved RNC relocation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coding scheme configured for the UE is inconsistent with the coding scheme indicated by the CN for the target RNC, then the UE-not-involved RNC relocation process cannot be implemented, but the UE relocation is required for load balancing and network optimization
Solution Approach 1:
The target RNC performs preliminary coding scheme reconfiguration before the UE actually relocates. The reconfiguration message is prepared in advance and sent to the source RNC, which then reconfigures the UE's coding scheme before the radio link is switched to the target RNC. This ensures coding scheme consistency is established prior to relocation completion.
Solution Approach 2:
The source RNC acts as an intermediary between the target RNC and the UE during the relocation process. It receives the reconfiguration message from the target RNC, processes it, and then applies the reconfiguration to the UE. This intermediary role allows the relocation to proceed without requiring direct interaction between the target RNC and UE, enabling UE-not-involved relocation while still achieving coding scheme reconfiguration.
2Reliability
If the coding scheme is reconfigured during UE-not-involved RNC relocation, then the UE can be successfully relocated, but the complexity of the relocation process increases
Solution Approach 1:
The coding scheme reconfiguration function is extracted from the UE and performed by the network side (source and target RNCs). Instead of involving the UE in the reconfiguration process, the reconfiguration message is transmitted through the network infrastructure, separating the reconfiguration operation from the UE and enabling UE-not-involved relocation.
Solution Approach 2:
The reconfiguration message is copied and transmitted through multiple network nodes. The target RNC creates the reconfiguration message, copies it to the source RNC via the CN, and the source RNC applies it to the UE. This copying mechanism allows the same reconfiguration data to be utilized at different stages of the relocation process without requiring UE involvement.
3Stability of the object's composition
If the target RNC rejects UE relocation directly when coding schemes are inconsistent, then the coding scheme consistency is maintained, but the network flexibility and load balancing capability are reduced
Solution Approach 1:
The coding scheme parameter is dynamically changed during the relocation process. Instead of requiring pre-matched coding schemes, the system allows the coding scheme parameter to be modified through the reconfiguration message, enabling relocation between RNCs with different coding schemes while maintaining consistency after relocation.
Data Source
AI summary
The present disclosure, relating to the field of communications technologies, discloses a method, an apparatus, and a system for relocating a user equipment between radio network controllers. The present disclosure is directed to configuring the coding scheme configured for the user equipment UE to a coding scheme consistent with the coding scheme supported by a target radio network controller to relocate the UE to the target RNC. The present disclosure is mainly applicable to inter-RNC handovers.