IoT Compression Context Setup via Gateway-Mediated SCHC
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Solution Overview
Problem
Low Power Wide Area (LPWA) networks, such as NB-IoT, face inefficiencies in bandwidth and energy usage due to the lack of optimized IP-based IoT protocols, with existing compression protocols like RoHC and SCHC requiring support in both IoT devices and cellular networks, and being computationally heavy or needing out-of-band context delivery.
Innovation Solution
A method for establishing a preconfigured compression context between IoT devices and application servers using context pointers and gateway interfaces, allowing for static context setup without direct communication between devices, utilizing SCHC compression techniques to reduce bandwidth and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If compression protocols like RoHC and SCHC are implemented in both IoT devices and cellular networks, then data transmission efficiency is improved, but device complexity and computational overhead increase
Solution Approach 1:
The patent introduces a context delivery function (CDF) as an intermediary component within the cellular network that manages compression context information. This mediator handles the complex tasks of context setup, storage, and delivery to IoT devices, allowing the devices themselves to use simpler compression algorithms without bearing the full computational burden. The CDF acts as a bridge between the network and devices, resolving the contradiction by centralizing complexity in the network infrastructure while keeping device implementations lightweight.
2Reliability
If compression context setup requires direct communication between IoT devices and application servers, then context accuracy is improved, but bandwidth consumption and energy usage increase
Solution Approach 1:
The CDF serves as an intermediary that establishes compression contexts between the application server and IoT device without requiring direct communication between them. The context delivery function receives context information from the application server and delivers it to the appropriate IoT devices through the cellular network infrastructure. This eliminates the need for energy-consuming direct device-server communication while maintaining context accuracy through the centralized management capabilities of the CDF.
Solution Approach 2:
The patent implements preliminary action by pre-establishing compression contexts through the CDF before actual data transmission occurs. The context setup phase is separated from the data transmission phase, allowing compression parameters to be configured in advance. This preliminary context establishment reduces the energy required during actual data transmission, as devices can immediately apply pre-configured compression algorithms without performing complex negotiations during active communication.
3Quantity of substance
If compression protocols are implemented in IoT devices, then bandwidth usage is reduced, but computational overhead and processing requirements increase
Solution Approach 1:
The CDF acts as a computational intermediary that performs heavy context management tasks on behalf of IoT devices. While devices do implement compression algorithms to reduce bandwidth usage, the CDF handles the complex aspects of context setup, maintenance, and synchronization. This division of labor allows devices to use efficient compression algorithms without bearing the full computational burden of context management, thus reducing their power consumption while still achieving bandwidth savings.
4Reliability
If context setup requires out-of-band delivery mechanisms, then context establishment reliability is improved, but setup time and network resource usage increase
Solution Approach 1:
The CDF is designed as a multi-functional component that can operate within the existing cellular network band without requiring separate out-of-band communication channels. It leverages the existing NIDD (Non-IP Data Delivery) service and SCEF (Service Capability Exposure Function) infrastructure to deliver context information. This universal approach uses existing network resources efficiently, avoiding the time and resource overhead associated with dedicated out-of-band delivery mechanisms while maintaining reliable context establishment through proven network pathways.
Data Source
AI summary
A method or enabling compression context setup for Internet-of-Thing, IoT, devices in a communication network is presented. The method is performed in an application server node for IoT devices, and includes sending a get context message to a gateway node, the get context message requesting a compression context setup includes compression details for an IoT device, receiving an indication of the requested compression context setup for the IoT device from the gateway node, and compressing and decompressing messages sent to and from the IoT device based on the received indication. An IoT device, a gateway node, an application node, a computer program and a computer program product thereof are also presented.