IMS Bearer Establishment Without Default Data Bearer
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Solution Overview
Problem
In resource-constrained networks, especially extra-terrestrial networks with limited bandwidth, establishing a default data bearer before an IMS bearer is often unfeasible due to bandwidth limitations, leading to failed connectivity for IMS services like voice and messaging.
Innovation Solution
A method that determines the public land mobile network (PLMN) associated with a base station and, if it does not allow a PDN data bearer connection, communicates a PDN connectivity request directly with an IMS bearer without establishing a data bearer, using a custom logic table indexed by PLMN to manage PDN connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a default data bearer is established before an IMS bearer in resource-constrained networks, then IMS service connectivity can be ensured, but bandwidth consumption exceeds network limits
Solution Approach 1:
The patent segments the traditional two-bearer approach (default data bearer + IMS bearer) into a single IMS bearer that carries both IMS services and default data traffic. This segmentation allows the system to meet bandwidth constraints while maintaining IMS service connectivity by eliminating the redundant default data bearer.
Solution Approach 2:
The IMS bearer is designed to serve multiple functions: it carries IMS services (voice, messaging) and simultaneously handles default data traffic. This multi-functionality allows the single bearer to replace the traditional two-bearer architecture, reducing bandwidth consumption while ensuring IMS connectivity.
2Reliability
If a default data bearer is established before an IMS bearer in resource-constrained networks, then data connectivity is ensured, but the IMS bearer cannot be established due to bandwidth limitations
Solution Approach 1:
The patent inverts the traditional bearer establishment sequence and dependency relationship. Instead of establishing a default data bearer first and then an IMS bearer, the system establishes only an IMS bearer that subsequently handles both IMS services and default data traffic. This inversion resolves the bandwidth conflict and enables IMS bearer establishment.
3Loss of energy
If bandwidth is limited in extra-terrestrial networks, then network resource conservation is achieved, but typical bearer establishment processes become unfeasible
Solution Approach 1:
The patent changes the bearer configuration parameters by eliminating the default data bearer and configuring the IMS bearer to handle both IMS services and default data traffic. This parameter change enables the bearer establishment process to succeed in bandwidth-constrained extra-terrestrial networks while conserving network resources.
Data Source
AI summary
Aspects provided herein provide methods, systems, and a non-transitory computer storage media storing computer-useable instructions for packet data network device handling in a resource constrained network. A resource constrained network may be an extra-terrestrial network with limited bandwidth. This limited bandwidth may cause the typical process of establishing a default data bearer before establishing an IMS bearer unfeasible, as too much bandwidth may be used by the default data bearer. Aspects discussed below provide a mechanism to establish an IMS bearer without establishing a default data bearer. The method begins with determining a public land mobile network (PLMN) associated with a base station which a UE is attempting to connect to. Then, based on a determination that the PLMN associated with the base station does not allow connection with a PDN data bearer, a PDN connectivity request is communicated with an IMS bearer and without a data bearer.