QoS Parameter Transmission During Network Handover
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the 3GPP network, during handover from 2G/3G systems to the SAE system, the SAE system cannot determine Quality of Service (QoS) parameters such as Aggregate Maximum Bit Rate (AMBR) due to the lack of separate QoS parameters in SAE bearers, which hinders effective QoS control and resource allocation during the handover process.
Innovation Solution
A method where the second network mobility management network element acquires QoS parameters of a UE during handover and transmits them to the second network access network and/or user plane network element, allowing these elements to receive and utilize the QoS parameters for resource allocation and QoS control, using methods such as default QoS configuration, accumulation, or selection of maximum values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the SAE system uses bearer-based architecture without separate QoS parameters, then the network structure is simplified, but the ability to determine and control QoS parameters such as AMBR during handover is lost
Solution Approach 1:
The patent applies preliminary action by having the mobility management network element acquire and determine QoS parameters (such as AMBR) before the handover process completes. The element retrieves QoS information from the user equipment context, determines appropriate QoS parameters based on this information, and configures them in advance in the access network element and user plane network element, ensuring QoS control is established before service transition occurs.
Solution Approach 2:
The patent introduces a mobility management network element as an intermediary between the user equipment and the access network/User Plane elements. This intermediary element is responsible for acquiring QoS information, determining appropriate QoS parameters, and transmitting them to the relevant network elements, thereby bridging the gap caused by the bearer-based architecture's lack of separate QoS parameters.
2Speed
If QoS parameters are not transmitted during handover, then the handover process is faster, but QoS control and resource allocation cannot be effectively implemented
Solution Approach 1:
The patent applies preliminary action by having the mobility management network element acquire and determine QoS parameters (such as AMBR) before the handover process completes. The element retrieves QoS information from the user equipment context, determines appropriate QoS parameters based on this information, and configures them in advance in the access network element and user plane network element, ensuring QoS control is established before service transition occurs.
Solution Approach 2:
The patent implements feedback mechanisms where the mobility management network element monitors the handover process and ensures QoS parameters are properly configured in the access network and user plane elements. The system verifies that QoS control is maintained during transition, allowing for adjustments if needed, thereby ensuring reliable QoS control without significantly impacting handover speed.
3Reliability
If the mobility management network element acquires and transmits QoS parameters to access network and user plane elements, then QoS control is improved, but the signaling overhead and processing complexity increase
Solution Approach 1:
The patent applies universality by designing the mobility management network element to perform multiple functions: it manages mobility, acquires QoS information from user equipment context, determines QoS parameters, and configures them in access network and user plane elements. This multi-functional approach consolidates QoS management responsibilities in a single element, avoiding the need for separate QoS management mechanisms in each network element and thus limiting the increase in overall network complexity.
Data Source
AI summary
A method for transmitting quality of service (QoS) during a handover process between systems and a network system and a destination network thereof are provided, which enable the QoS to be transmitted to a second access network during a handover process of a user equipment (UE) between systems. The method comprises: a second network mobility management network element acquires QoS of a UE during a handover process of the UE from a first network to a second network; and the second network mobility management network element transmits the acquired QoS to the second network access network and/or a user plane network element.