Cellular Network Access Selection via Base Station Validation
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Solution Overview
Problem
Current access selection methods in cellular telecommunications networks, such as ANDSF, are inefficient in dynamically managing network load and radio conditions, leading to unpredictable user behavior and increased operational costs during peak usage periods, especially in high-traffic areas.
Innovation Solution
A method that allows the cellular network to control user equipment behavior by providing validation information to steer data bearers from serving base stations to WLAN access points, enabling dynamic load management and quality control through policy validation and access point timer information, independent of policy data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If network selection policies are statically configured at the user equipment side or semi-statically updated via ANDSF, then policy management is simplified, but network overload situations cannot be effectively managed and operational costs increase during peak usage periods
Solution Approach 1:
The patent transforms static policy configuration into a dynamic system where the network can send real-time validation information to user equipment. This allows policies to adapt to changing network conditions (load, radio quality) without requiring complex semi-static updates via ANDSF, resolving the contradiction between simplicity and efficiency.
Solution Approach 2:
The network receives feedback from user equipment about data bearer status and sends validation information back to control policy application. This feedback loop enables the network to dynamically adjust policy enforcement based on actual network conditions, improving load management efficiency while keeping device complexity low.
2Adaptability or versatility
If access selection decisions are taken by user equipment based on configured policies, then user equipment autonomy is improved, but unpredictable user behavior occurs especially under fast-changing user load conditions
Solution Approach 1:
The network monitors user equipment behavior and data bearer status, then sends validation information to guide policy application. This feedback mechanism ensures predictable network-controlled behavior while preserving user equipment autonomy to make local decisions based on network-provided validation cues.
Solution Approach 2:
The network changes the validation parameter (validation information) sent to user equipment based on network conditions. This allows the same policy to produce different outcomes depending on network state, ensuring reliability under fast-changing load conditions while maintaining user equipment adaptability.
3Productivity
If WLAN access points are deployed as public hot-spots to establish data bearers, then network capacity is improved, but network overload situations occur during peak time periods in high-traffic urban areas
Solution Approach 1:
The system dynamically controls data bearer establishment via validation information sent to user equipment. During peak periods, the network can invalidate policies that would route traffic through overloaded WLAN access points, preventing overload while maintaining high network capacity through alternative routing options.
Solution Approach 2:
The network monitors WLAN access point load and provides feedback through validation information to user equipment. This enables real-time load balancing where users are guided away from overloaded hot-spots and toward underutilized access points, maintaining service quality during peak periods.
4Adaptability or versatility
If ANDSF is used to deliver access network selection policies, then policy delivery framework is established, but heavy signalling load and support for only infrequent changes occur
Solution Approach 1:
The patent extracts the policy validation function from the complex ANDSF framework and implements it directly in the base station entity. This eliminates the need for heavy ANDSF signalling while maintaining policy delivery capability, reducing signalling overhead and enabling more frequent policy adjustments.
Solution Approach 2:
The base station entity acts as an intermediary that directly provides validation information to user equipment without requiring full ANDSF framework involvement. This simplified mediation path reduces signalling overhead while maintaining the ability to deliver and update policies frequently.
Data Source
Figure 1~3
AI summary
The invention relates to a method for enhanced access selection of a user equipment in a cellular telecommunications network, the telecommunications network comprising an access network and the user equipment being located in a radio cell of the access network, wherein the radio cell is served by a serving base station entity, wherein the user equipment is –additionally to being located in the radio cell –located in a radio coverage area of an access point, wherein the user equipment is registered with the telecommunications network via the serving base station entity, wherein the user equipment comprises or receives a policy information data element, the policy information data element being related to a policy regarding the establishment of a data connection, using at least one data bearer, of the user equipment with the telecommunications network, via the access point instead of via the serving base station entity, wherein in case that -- a data bearer between the user equipment and the telecommunications network is to be established or is ongoing, and -- the policy allows the establishment or the continuation of the data bearer of the user equipment via the access point instead of via the serving base station entity, the method comprises the following steps: -- in a first step, the serving base station entity sending a validation information to the user equipment, the validation information having either a positive value, indicating to apply the policy related with the policy information data element, or a negative value, indicating not to apply the policy related with the policy information data element, -- in a second step, subsequent to the first step, the user equipment applying the policy related with the policy information data element in case that the validation information has a positive value, and the user equipment terminating the data bearer or refraining from establishing the data bearer via the access point in case that the validation information has a negative value.