RNC E-RGCH Information Exchange for Interference Control
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Solution Overview
Problem
In the context of 3GPP Rel-11, UEs in a CELL-FACH state face challenges in obtaining common E-RGCH information from neighboring RNCs, leading to incorrect monitoring and interference control failures due to the absence of a dedicated Iur interface and manual configuration limitations.
Innovation Solution
A method and system for exchanging common E-RGCH information between RNCs, where a first RNC receives and updates E-RGCH information from an adjacent second RNC, determining a candidate E-RGCH receiving neighboring cell set, and sends configuration parameters to the UE, ensuring timely updates and correct monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual OAM configuration is used to obtain common E-RGCH information from neighboring RNC, then the UE can acquire E-RGCH configuration parameters, but the information cannot be updated timely when configuration changes occur in the neighboring cell
Solution Approach 1:
The patent implements a feedback mechanism where the serving RNC continuously monitors and obtains updated common E-RGCH information from the neighboring RNC through interface signaling. When configuration parameters change in the neighboring cell, the serving RNC automatically receives and forwards the updated information to the UE, eliminating the need for manual reconfiguration and ensuring timely updates.
Solution Approach 2:
The patent performs preliminary action by pre-establishing the information exchange mechanism between RNCs before the UE needs to use common E-RGCH. The serving RNC proactively obtains and caches the neighboring RNC's E-RGCH configuration information, so that when the UE enters CELL-FACH state and needs to monitor common E-RGCH, the information is already available and can be quickly provided without manual configuration delays.
2Loss of information
If the serving RNC does not have Iur interface connection to the neighboring RNC, then the network architecture remains simple, but the serving RNC cannot obtain common E-RGCH information from the neighboring RNC
Solution Approach 1:
The patent introduces an intermediary mechanism where the serving RNC acts as a mediator between the neighboring RNC and the UE. The serving RNC obtains common E-RGCH information from the neighboring RNC through existing interface protocols (without requiring dedicated Iur interface to UE) and forwards it to the UE via RRC signaling, thus bridging the information gap without adding complex direct connections.
Solution Approach 2:
The patent makes the serving RNC multi-functional by enabling it to perform both its traditional serving functions and the additional function of obtaining and distributing common E-RGCH information from neighboring RNCs. The serving RNC uses its existing interface capabilities to communicate with neighboring RNCs and leverages its existing RRC connection with the UE to deliver the information, thus achieving universal functionality without adding specialized dedicated interfaces.
3Object-affected harmful factors
If the UE monitors common E-RGCH channel of neighboring cell, then interference control can be achieved, but the UE fails to obtain correct E-RGCH information when belonging to different RNCs
Solution Approach 1:
The patent merges the information acquisition process by combining the serving RNC's connection to the UE with its information exchange with the neighboring RNC. Instead of requiring separate dedicated information paths, the patent combines these functions through the serving RNC, which simultaneously maintains the RRC connection with the UE and the information exchange relationship with the neighboring RNC, thus delivering the correct E-RGCH information through the existing serving path.
Data Source
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AI summary
The present application discloses a method, an apparatus and a system for exchanging common E-RGCH information. The method includes: receiving a common E-RGCH information message of a cell managed by a second radio network controller (RNC), where the common E-RGCH information message is sent by the second RNC; selecting a candidate common E-RGCH receiving neighboring cell set for the UE, where the candidate common E-RGCH receiving neighboring cell set includes a neighboring cell with an available common E-RGCH feature and the neighboring cell is determined according to common E-RGCH information message sent by the second RNC; and sending common E-RGCH configuration parameter information of each cell in the candidate common E-RGCH receiving neighboring cell set to the UE. In the present application, by exchanging the common E-RGCH information between RNCs, a UE can correctly acquire current common E-RGCH configuration parameter information of a common E-RGCH receive neighboring cell that belongs to the second RNC, thereby avoiding incorrect monitoring.