Wireless Device Radio Access Network Selection
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Solution Overview
Problem
Current wireless devices operating in cellular networks with multiple radio access technologies face challenges in selecting the best access technology for maximum data throughput without overloading the network with unnecessary signaling, as they rely on network operators to decide which technology to use.
Innovation Solution
A method where the wireless device detects and evaluates alternative radio access networks based on predefined parameters, such as availability and access technology differences, allowing it to send connection release indications and requests to switch to a more suitable network, thereby taking control of its access technology selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wireless device repeatedly sends Signalling Connection Release Indications (SCRI) to switch radio access networks, then the device can access the radio access network with the best data throughput, but it generates an immense overload of additional signalling in the wireless cellular network
Solution Approach 1:
The network node provides the wireless device with information about multiple radio access networks in advance, including their characteristics and suitability for different data throughput requirements. This preliminary information enables the device to make informed decisions without repeatedly signaling the network, thus achieving high data throughput while avoiding signalling overload.
Solution Approach 2:
The wireless device is empowered to autonomously decide which radio access network to operate in based on the provided information and its own data throughput requirements. The device independently evaluates the characteristics of different radio access networks and selects the most suitable one without requiring continuous network intervention, thereby reducing signalling overhead while maintaining optimal productivity.
2Loss of energy
If the wireless network operator decides which radio access network the wireless device operates in, then network resources are optimally used, but the device cannot access the radio access network providing the best data throughput for its specific needs
Solution Approach 1:
The network node provides feedback to the wireless device about the characteristics and availability of different radio access networks. This feedback mechanism enables the device to make informed decisions that balance network resource efficiency with its own data throughput requirements, creating a win-win situation where both network optimization and device performance are achieved.
Solution Approach 2:
The system transitions from a static network-controlled decision model to a dynamic model where the wireless device can adaptively select radio access networks based on real-time conditions and its own requirements. The network provides updated information about available radio access networks, allowing the device to dynamically adjust its selection to optimize both network resource usage and data throughput.
3Device complexity
If the wireless device is restricted to knowing only the access technology of the radio access networks it is currently operating in, then the network architecture remains simple, but the device cannot make informed decisions about switching to radio access networks with better data throughput
Solution Approach 1:
The network node provides the wireless device with advance information about multiple radio access networks, including their access technologies and characteristics. This preliminary information enables the device to evaluate different options and make informed switching decisions without requiring complex real-time analysis, thus improving data throughput while maintaining relatively simple network architecture.
Data Source
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AI summary
A method to operate a wireless device (1) in a wireless cellular network, the wireless device (1) comprising a communication unit (2), the wireless cellular network comprising at least two radio access networks (8), the communication unit (2) being configured to communicate to a network node being part of the wireless cellular network, the network node being associated to a first radio access network, the method comprising the steps for the communication unit of: detecting if a second radio access network of said wireless cellular network fulfils a predefined set of access parameters (83), wherein the second radio access network supports a different access technology than the first radio access network, if the detection step indicates that said second radio access network fulfils said set of access parameters: sending a connection release indication to the network node (S4), receiving from the network node a connection release confirmation message (S5), sending a connection request message to the wireless cellular network with selection of said second radio access network (S6).