LTE-WLAN Coordination via eNodeB Indications
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current systems face challenges in effectively coordinating 3GPP LTE and WLAN networks, particularly in deciding to offload bearers from LTE to WLAN or vice versa, which affects network efficiency and user experience.
Innovation Solution
A method is proposed where the eNodeB (eNB) transmits indications to the Mobility Management Entity (MME) about WLAN offloading support and charging rules, allowing for coordinated bearer management between LTE and WLAN networks, enabling the eNB to decide on offloading and informing the core network about UE connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LTE and WLAN networks operate independently without coordination mechanisms, then each network can be managed separately with simpler control, but network efficiency and resource utilization deteriorate due to lack of unified bearer management
Solution Approach 1:
The patent introduces an intermediary coordination mechanism between LTE and WLAN networks that enables unified bearer management. This intermediary layer facilitates information exchange and coordinated decision-making between the two networks, improving overall network efficiency without requiring complete integration of the networks themselves.
Solution Approach 2:
The coordination mechanism is designed to handle multiple functions including bearer management, traffic steering, and resource allocation across both LTE and WLAN networks. This multi-functional approach improves network efficiency while avoiding the need for separate coordination systems for each function.
2Productivity
If bearer offloading decisions are made without unified coordination, then individual networks can make autonomous decisions with simpler control logic, but network utilization and service quality deteriorate
Solution Approach 1:
The patent merges the bearer management functions of LTE and WLAN networks into a unified coordination framework. This allows for optimized bearer offloading decisions that consider the state of both networks simultaneously, improving overall network utilization while maintaining manageable complexity through standardized procedures.
3Loss of information
If LTE and WLAN networks lack coordination indicators and signaling mechanisms, then signaling protocols remain simple, but the ability to inform core network about UE connectivity deteriorates
Solution Approach 1:
The patent implements preliminary signaling mechanisms that establish coordination indicators before actual bearer offloading occurs. This allows the core network to be informed in advance about UE connectivity status and bearer locations, preventing information loss while keeping signaling overhead manageable through standardized indicator formats.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A method and apparatus for transmitting an indication for coordination of 3rd generation partnership project long-term evolution (3GPP LTE) and wireless local area network (WLAN) in a wireless communication system is provided. In a cell-specific scheme, an eNodeB (eNB) transmits a first indication of WLAN offloading support to a mobility management entity (MME), and receives a second indication of applying different charging rules from the eNB. Alternatively, in a user equipment (UE)-specific scheme, the eNB transmits a first indication of WLAN offloading support to the MME, receives a second indication of which bearer can be offloaded or not from the eNB, and applyies offloading for a specific UE according to the second indication.