Group Messaging Retransmission via Unreached Device List
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for group messaging in IoT systems, such as those described in 3GPP TR 23.887 and TR 23.888, lead to an increase in the number of control messages when MTC devices cannot receive group messages due to temporary failures, causing unnecessary retransmissions and network congestion.
Innovation Solution
A communication processing apparatus and method that identifies and maintains a list of unreached devices within a group, allowing targeted retransmissions only to those devices that did not receive the initial message, thereby reducing the overall number of control messages and network congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If group messaging is performed to reduce the number of messages exchanged with MTC devices, then message efficiency is improved, but if some devices cannot receive the message due to temporary failures, retransmission processing increases the number of control messages
Solution Approach 1:
The patent segments the device group into two distinct subsets: reached devices and unreached devices. This segmentation is achieved by maintaining separate lists (reached-device list and unreached-device list) that categorize devices based on their message reception status. By dividing the original device group, the system can apply different processing strategies to each subset, thereby reducing unnecessary retransmissions to devices that have already received the message while ensuring reliable delivery to devices that have not.
Solution Approach 2:
The patent applies local quality by treating reached devices and unreached devices differently. Reached devices are excluded from further retransmission processing, while unreached devices receive targeted retransmission attempts. This localized differentiation allows the system to optimize message delivery by applying appropriate actions to specific device subsets rather than uniformly processing all devices in the group, thus reducing overall control message overhead.
2Reliability
If retransmission processing is performed for devices that cannot receive group messages, then message delivery reliability is improved, but the number of control messages and network congestion increases
Solution Approach 1:
The patent extracts unreached devices from the overall device group by maintaining a separate unreached-device list. This extraction process identifies and isolates only those devices that genuinely require retransmission attention, separating them from devices that have successfully received the message. By taking out only the necessary retransmission targets, the system avoids generating harmful network congestion from redundant control messages sent to already-reached devices.
Solution Approach 2:
The patent applies partial action by performing retransmission processing only on a subset of devices (unreached devices) rather than on the entire device group. This selective partial processing ensures message delivery reliability for devices that need it while avoiding excessive control messages that would cause network congestion. The system precisely applies retransmission action only where necessary, optimizing the balance between reliability and network efficiency.
Data Source
AI summary
A system of this invention is directed to a communication processing system that suppresses an increase in number of control messages even if devices cannot receive a group message. The communication processing system includes a holder that holds identifiers of a plurality of devices included in a device group as a target of a group messaging requested from an application, an unreached-device list acquirer that acquires an unreached-device list created by excluding, identifiers of devices which the group message has reached from the identifiers held in the holder based on responses to delivery of the group message, and a message deliverer that delivers a message based on the group messaging to devices having identifiers included in the unreached-device list.