Radio Bearer QoS Mapping for Flow-Based Resource Control
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Solution Overview
Problem
The 4G mobile communication system faces challenges in QoS management due to the inability of base stations to adjust QoS parameters based on actual radio load, leading to resource wastage and inefficient flow-based QoS control, with PCRF entities making suboptimal decisions without real-time load information.
Innovation Solution
Implementing methods and devices in base stations, CN control network elements, and user terminals to create and manage mapping relations between CN flow identifiers and QoS parameters, allowing dynamic adjustment of radio bearers to match QoS requirements, and enabling efficient utilization of existing or new bearers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a new bearer is established for every PDN connection, then QoS parameter mapping is simple and direct, but system resources are wasted due to bearer reuse not being utilized
Solution Approach 1:
The base station pre-establishes multiple bearers with different QoS parameters before PDN connection requests arrive. When a PDN connection is requested, the base station matches the requested QoS parameters against the pre-established bearers and reuses an existing bearer if it satisfies the requirements, avoiding the need to establish a new bearer and thus saving system resources.
2Quantity of substance
If bearer reuse is implemented to save resources, then system resource utilization improves, but the complexity of matching QoS parameters increases
Solution Approach 1:
The QoS parameter matching process is segmented into distinct steps: first extracting QoS parameters from the PDN connection request, then separately matching these parameters against the QoS parameters of pre-established bearers, and finally selecting a suitable bearer based on the matching results. This segmentation simplifies the overall complexity by breaking down the matching process into manageable, systematic steps.
Solution Approach 2:
The base station maintains information about pre-established bearers including their QoS parameters, and uses this information as feedback to determine whether an existing bearer can satisfy the QoS requirements of a new PDN connection. This feedback mechanism enables efficient bearer selection without requiring complex real-time negotiations, as the base station can directly compare requested QoS parameters against known bearer capabilities.
3Productivity
If multiple bearers are pre-established with different QoS parameters, then bearer reuse efficiency improves, but the initial setup complexity and resource occupation increase
Solution Approach 1:
The base station establishes bearers with standardized QoS parameter configurations that can serve multiple different PDN connections with similar requirements. By creating bearers with universal QoS characteristics that can satisfy multiple types of traffic demands, the system reduces the total number of bearers needed while maintaining high reuse efficiency, thereby balancing setup complexity with operational efficiency.
Data Source
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AI summary
The embodiments of the present disclosure provide methods and apparatuses for control of Quality of Service (QoS). A method applied in a base station for control of QoS includes: receiving a Core Network (CN) flow identifier and information on a corresponding QoS parameter of a Packet Data Network (PDN) connection as transmitted from a CN control network element and creating a mapping relation between the CN flow identifier and the corresponding QoS parameter; and utilizing, after determining based on the received information on the QoS parameter of the PDN connection that a radio bearer satisfying a requirement of the QoS parameter exists between a user terminal and the base station, the existing radio bearer satisfying the requirement of the QoS parameter, creating a mapping relation between the existing radio bearer and the CN flow identifier of the PDN connection and transmitting information on the mapping relation to the user terminal.