Multi-Path RRC Reconfiguration Feedback via Direct Path
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Solution Overview
Problem
In multi-path communication schemes, there is a lack of a solution for how a remote terminal equipment transmits an RRC reconfiguration complete message to a network device when an indirect path is added or changed.
Innovation Solution
A multi-path communication apparatus and method where the remote terminal equipment receives an RRC reconfiguration message via a direct path and transmits the RRC reconfiguration complete message back to the network device via the direct path, allowing the network device to determine the success of the configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the remote terminal equipment transmits the RRC reconfiguration complete message via the indirect path, then the indirect path functionality is utilized, but the network device cannot reliably determine whether the configuration was successfully applied
Solution Approach 1:
The patent uses the direct path as an intermediary channel to transmit the RRC reconfiguration complete message from the remote terminal equipment to the network device. This mediator approach ensures that the configuration status feedback reaches the network device reliably, regardless of the indirect path's operational state, thereby resolving the information loss problem.
Solution Approach 2:
Instead of transmitting the RRC reconfiguration complete message through the indirect path (the newly added path), the patent inverts the approach by sending it through the direct path (the existing reliable path). This inversion ensures that the configuration feedback is delivered reliably to the network device.
2Reliability
If the remote terminal equipment maintains both direct and indirect paths, then communication reliability is improved, but the device complexity increases
Solution Approach 1:
The patent segments the communication functionality by assigning different purposes to different paths: the direct path is used for critical control signaling (RRC reconfiguration complete message), while the indirect path is used for data transmission. This segmentation allows the system to maintain both paths for reliability without requiring complex coordination for all signaling types.
Solution Approach 2:
The direct path serves multiple functions: it maintains the original reliable connection and additionally serves as the feedback channel for RRC reconfiguration complete messages. This multi-functionality reduces the need for separate dedicated feedback channels, thereby managing complexity while maintaining reliability.
3Adaptability or versatility
If the RRC reconfiguration complete message is transmitted via the indirect path, then the indirect path is activated, but configuration consistency between terminal and network device cannot be ensured
Solution Approach 1:
The direct path acts as a stable intermediary channel that ensures configuration consistency by reliably transmitting the RRC reconfiguration complete message. This mediator approach decouples the activation of the indirect path from the reliability of configuration feedback, allowing the system to maintain configuration consistency even when the indirect path is newly activated.
Data Source
AI summary
A multi-path communication apparatus, configured in a remote terminal equipment, includes: a receiver configured to receive a radio resource control reconfiguration message for adding or changing an indirect path transmitted by a network device via a direct path; and a transmitter configured to transmit a radio resource control reconfiguration complete message to the network device via the direct path, wherein, a first timer is started when the remote terminal equipment receives the radio resource control reconfiguration message for adding or changing an indirect path; and, the first timer is stopped under a first condition, the first condition includes: the remote terminal equipment receives indication information transmitted by the relay terminal equipment.