LPWA Radio Apparatus Buffer for UDP Data Reliability
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Solution Overview
Problem
In radio communication systems using LPWA schemes, data may be discarded when a radio communication apparatus resumes communication before the connected host device is ready to receive it, due to the lack of delivery confirmation or retransmission mechanisms in protocols like UDP, leading to communication reliability issues.
Innovation Solution
The radio communication apparatus transitions to a power saving state during periods of no data communication, stores data addressed to it in the network, and resumes communication after a predetermined time, using a buffer to hold received data until the host device is ready for transfer, and optionally sends NAS messages to manage data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the radio communication apparatus uses UDP for data transmission to reduce communication time and cost, then communication efficiency is improved, but data reliability deteriorates because UDP lacks delivery confirmation and retransmission mechanisms
Solution Approach 1:
The patent introduces a buffer as an intermediary component between the radio communication apparatus and the host device. When data is received from the network, it is first stored in the buffer before being transferred to the host device. This buffer acts as a mediator that decouples the timing between data reception and data transfer, allowing the system to use efficient UDP protocols while ensuring reliable data delivery even when the host device is not immediately ready to receive data.
2Use of energy by moving object
If the radio communication apparatus stops radio communication during periods of no data communication to save power, then power consumption is reduced, but data reception capability deteriorates until the apparatus resumes communication
Solution Approach 1:
The patent implements preliminary action by having the network side store incoming data in advance when the radio communication apparatus is in power-saving mode. Before the apparatus resumes communication, the data is already prepared and waiting in the buffer. This preliminary storage action ensures that when the apparatus wakes up, data can be immediately transferred without loss, thus maintaining reliability while achieving power savings during idle periods.
3Speed
If the radio communication apparatus resumes communication before the host device is ready to receive data, then communication responsiveness is improved, but data loss occurs because there is no mechanism to hold data until the host device is ready
Solution Approach 1:
The buffer serves as an intermediary storage mechanism that resolves the timing mismatch between data arrival and host device readiness. When the radio communication apparatus resumes communication and receives data, the buffer holds the data temporarily. The transfer controller then transfers the data to the host device at the appropriate time. This intermediary buffer ensures both responsiveness (data is received immediately upon resumption) and reliability (data is not lost even if the host device is not ready).
Data Source
AI summary
A LPWA communication apparatus 100 comprises a radio communicator 131 configured to perform a radio communication with a radio communication network 300 by an LPWA scheme, receive, from the radio communication network 300, data transmitted using a UDP, and a transfer controller 132 configured to transfer, to the host device 200, the data received by the radio communicator 131. The radio communicator 131 is configured to resume the radio communication after a predetermined time elapses after transitioning to a power saving state in which the radio communication is stopped, and receive data stored during in the power saving state. The transfer controller 132 is configured to cause a buffer to hold the data received by the radio communicator 131 when data transfer to the host device 200 is impossible when the radio communicator 131 resumes the radio communication.