Pre-exchanging System Information for Wireless Data Offload
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Solution Overview
Problem
The increasing demand for wireless data communication in high-density user equipment (UE) areas poses capacity challenges, which existing technologies struggle to address effectively, particularly in regions with high UE density, where small cells are deployed to offload data from macro cells but result in excessive system information exchange during data offload procedures.
Innovation Solution
Pre-exchanging system information between macro and small cell wireless access network nodes prior to data offload, reducing the amount of information exchanged during the offload process, and utilizing a data structure to store and manage this information, such as the AS-Config-Common IE, to facilitate efficient data offload without overloading the backhaul link.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If small cells are deployed to offload data from macro cells, then data communication capacity is increased, but system information exchange during data offload procedures becomes excessive
Solution Approach 1:
The patent applies preliminary action by pre-exchanging system information between macro cell and small cell wireless access network nodes before data offload occurs. This allows the necessary configuration data to be prepared in advance, reducing the information exchange burden during actual offload procedures while maintaining the capacity benefits of small cell deployment
2Ease of operation
If system information is exchanged during data offload procedures, then data offload can be performed, but signaling load on backhaul link increases
Solution Approach 1:
The patent reduces signaling load by performing system information exchange in advance before data offload, rather than during the offload procedure itself. This preliminary exchange eliminates the need for extensive information transfer during critical data offload operations, maintaining offload capability while reducing backhaul link stress
3Reliability
If extensive system information is exchanged during data offload, then complete configuration data is transferred, but power consumption at UEs increases
Solution Approach 1:
The patent reduces UE power consumption by pre-exchanging system information between network nodes before data offload. This eliminates the need for UEs to process and handle extensive system information during offload procedures, maintaining configuration completeness while significantly reducing the energy burden on mobile devices
Data Source
AI summary
A first wireless access network node receives common radio resource configuration information of a second wireless access network node. A data offload request is sent to the second wireless access network node to perform a data offload for a user equipment (UE) attached to the first wireless access network node.