Temporary Default Bearer for LTE Resource Conservation

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Solution Overview

Problem

In LTE networks, permanent default bearers consume network resources and memory, and require re-establishment of signaling sessions, which can be inefficient for applications that infrequently send and receive data, leading to increased processing and resource usage.

Innovation Solution

Implementing a temporary default bearer that can be released and re-established during a PDN session, allowing for the maintenance of signaling sessions without a default bearer, thereby conserving network resources and reducing the need for re-establishing signaling sessions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a permanent default bearer is maintained for the entire PDN session, then data transmission can be immediately resumed when needed, but network resources and memory are consumed continuously even when data is not being transmitted

Engineering Contradiction:

Improvedata transmission readinessVSAvoidnetwork resources consumption

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The patent applies the dynamics principle by transitioning from a static permanent default bearer to a dynamic temporary default bearer that can be established and released based on actual data transmission needs. The bearer exists only when required for data transfer and is released when not in use, making the system adaptable to varying traffic conditions while optimizing resource utilization.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements discarding and recovering by releasing the temporary default bearer after data transmission is complete and recovering the network resources for reuse. The signaling session is preserved in a suspended state, allowing rapid re-establishment of the bearer without full session setup, thus recovering resources while maintaining quick resume capability.

Inventive Principle:

Principle #34Discarding and recovering

2Reliability

If a permanent default bearer is maintained, then signaling sessions remain active throughout the PDN session, but processing overhead and resource usage increase for infrequent data transmissions

Engineering Contradiction:

Improvesession continuityVSAvoidprocessing overhead

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent applies periodic action by establishing the temporary default bearer only during periods when data transmission is required, rather than maintaining it continuously. The bearer is created on-demand, used for data transfer, and then released, creating a periodic pattern of bearer establishment and release that reduces processing overhead during idle periods while maintaining session continuity through preserved signaling contexts.

Inventive Principle:

Principle #19Periodic action

3Quantity of substance

If a temporary default bearer is released during a PDN session, then network resources are conserved, but the bearer must be re-established which requires re-setting up signaling sessions

Engineering Contradiction:

Improvenetwork resources conservationVSAvoidbearer re-establishment time

Core Design Contradiction:

Quantity of substanceVSLoss of time

Solution Approach 1:

The patent applies preliminary action by preserving the signaling session context and configuration information when the temporary default bearer is released. The network devices maintain the signaling session in a suspended state with all necessary parameters and state information stored, so that when data transmission is needed again, the bearer can be rapidly re-established using the pre-preserved signaling context without full session setup procedures.

Inventive Principle:

Principle #10Preliminary action

4Reliability

If permanent default bearers are used, then devices require wake-up techniques such as SMS to notify of downlink data, but this increases device complexity and manufacturing costs

Engineering Contradiction:

Improvedownlink data notificationVSAvoidwake-up mechanism requirements

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies the taking out principle by extracting and removing the complex wake-up notification mechanisms (such as SMS) from the device requirements. By using temporary default bearers that can be rapidly re-established, the system eliminates the need for separate wake-up notification paths, simplifying the device architecture and reducing manufacturing costs while maintaining reliable downlink data delivery through the optimized bearer management approach.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS10779353B2Using a temporary default bearer for a packet data network session

Publication Date: 2020.09.15 VERIZON PATENT & LICENSING INC

AI summary

A device may receive a request to establish a packet data network (PDN) session for a user device. The device may provide a first instruction to establish the PDN session for the user device with a temporary default bearer based on receiving the request. The temporary default bearer may be maintained for less than a duration of the PDN session. The device may receive an indication to release the temporary default bearer after providing the first instruction to establish the PDN session. The device may provide a second instruction to release the temporary default bearer and maintain one or more signaling sessions associated with the PDN session based on receiving the indication to release the temporary default bearer. The one or more signaling sessions, associated with the PDN session, may be maintained after the temporary default bearer has been released.