Radio Communication System HSS Load Reduction via Identifier Association
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Solution Overview
Problem
In the next generation radio communication system, there is a need to efficiently establish a PDU session triggered from an application server, while reducing the load on the subscriber management device and enabling the application server to detect user equipment that has completed the attach process, as existing methods increase the load on the HSS and fail to accurately identify active user equipment.
Innovation Solution
The radio communication system includes a call control device that processes call control signals, a subscriber management device that manages subscriber information, and a connection device that connects with the application server. The subscriber management device stores information associating user equipment identifiers with application server identifiers, allowing the call control device to acquire and associate these identifiers, and the connection device reports the activation of application server identifiers to the application server, thereby facilitating PDU session establishment without frequent queries to the HSS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the application server frequently queries the HSS to detect active user equipment, then the application server can identify active user equipment, but the load on the HSS increases
Solution Approach 1:
The HSS performs preliminary actions by proactively notifying the application server when a user equipment completes the attach process. This eliminates the need for frequent queries from the application server, as the server already has up-to-date information about active user equipment through the notification mechanism.
Solution Approach 2:
A feedback mechanism is established where the HSS sends notifications to the application server about user equipment status changes. This feedback loop ensures the application server has accurate information about active user equipment without needing to continuously query the HSS, thus reducing the load on the HSS while maintaining detection accuracy.
2Adaptability or versatility
If the HSS manages all subscriber information and identifier associations, then centralized management is achieved, but the HSS becomes a bottleneck and increases system load
Solution Approach 1:
The patent extracts the identifier association and notification functions from the HSS and implements them in the application server. The HSS retains its core function of managing subscriber information, while the application server handles the association of identifiers and sends notifications. This distribution reduces the HSS's processing burden and system complexity.
Solution Approach 2:
The patent introduces an intermediary mechanism where the call control device acts as a mediator between the HSS and the application server. The call control device receives notifications from the HSS and forwards them to the application server, distributing the system's functional load and reducing the HSS's direct interaction complexity.
3Adaptability or versatility
If the system supports multiple types of user equipment with different data transmission patterns, then device versatility is improved, but the session management complexity increases
Solution Approach 1:
The patent implements a dynamic session management approach where PDU sessions are established on-demand based on the specific needs of different user equipment types. Rather than maintaining static sessions for all devices, the system dynamically creates sessions when needed and releases them when not needed, adapting to the diverse requirements of IoT devices, smartphones, and other equipment types.
Data Source
AI summary
A radio communication system includes user equipment; a call control device; a subscriber management device; and a connection device that connects an application server, wherein the subscriber management device includes a subscriber information storage unit that stores subscriber information that associates a first identifier for identifying the user equipment in the radio communication system with a second identifier for identifying the user equipment in the application server, wherein the call control device includes a first context storage unit and a first communication processing unit that transmits the first identifier, the second identifier, and a call control device identifier to the connection device, and wherein the connection device includes a second context storage unit and a second communication processing unit that reports, to the application server, that the second identifier is activated.