Network Selection Control Method for Cellular RAN and WLAN Offload
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing network selection methods for user terminals in cellular RAN and wireless LAN systems do not effectively manage traffic offloading, leading to increased load in individual cells, which can result in congestion and inefficient resource allocation.
Innovation Solution
A network selection control method that involves transmitting offload control information from a crowded cellular RAN cell to neighboring cells, allowing user terminals to initiate an offload process to wireless LAN access networks before handover, thereby reducing the load on the crowded cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If offload control information is transmitted only from the current cell to user terminals in that cell, then the control mechanism is simple, but user terminals cannot proactively offload before handover, leading to increased load in crowded cells
Solution Approach 1:
The patent applies preliminary action by transmitting offload control information from neighboring cells to user terminals before handover occurs. This allows user terminals to proactively initiate offload processes to wireless LAN networks in advance, preventing load concentration in crowded cells rather than reacting after handover
Solution Approach 2:
The patent segments the offload control information transmission by cell, where each cell independently transmits offload control information to user terminals in its coverage area. This segmented approach enables localized proactive offload decisions while maintaining overall network load balance
2Ease of operation
If user terminals wait for handover to initiate offload processes, then the control mechanism is simple, but traffic load concentrates in individual cells causing congestion and inefficient resource allocation
Solution Approach 1:
The patent enables user terminals to perform offload operations in advance by receiving offload control information from neighboring cells before handover. This preliminary action distributes traffic proactively across multiple access networks, improving resource allocation efficiency while maintaining simple terminal-side operations
Solution Approach 2:
The patent implements feedback mechanisms where base stations monitor cell load conditions and dynamically adjust offload control information transmission. This feedback loop ensures efficient resource allocation by responding to actual network conditions while keeping the control mechanism manageable through automated decision-making
Data Source
AI summary
A network selection control method is a method for selecting, from a E-UTRAN and a WLAN, an access network in which a traffic of a UE 100 is transmitted and received. The network selection control method comprises the steps of: transmitting, by a cell #1 in the E-UTRAN, offload control information to a UE 100-1 that exists in the cell #1, the offload control information being for requesting switching of an access network in which the traffic of the UE 100-1 is transmitted and received, to the WLAN; and transmitting, by a cell #2 neighboring the cell #1 in the E-UTRAN, to a UE 100-2 that exists in the cell #2, neighboring cell offload information indicating that the offload control information is transmitted in the cell #1.