Group Management Server Periodic Message Multicast
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Solution Overview
Problem
Current communication technologies, such as oneM2M and 3GPP networks, do not support periodic message multicasting to groups, leading to inefficiencies and increased resource consumption when sending messages to capability-limited IoT devices that may be in a dormant state, requiring re-sending or buffering of messages.
Innovation Solution
A message sending method where a group management server obtains and sends a message sending period interval to group members, allowing them to prepare and receive messages within that interval, thereby avoiding message failures and reducing the need for re-sending, using a temporary mobile group identity (TMGI) and communications resources allocated for MBMS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If capability-limited devices are limited in memory or power supply and enter a dormant state, then energy consumption is reduced, but message reception fails
Solution Approach 1:
The group management server pre-configures the message sending period interval and TMGI to group members before they enter dormant state. This preliminary action allows devices to wake up at the correct time and receive messages without continuous monitoring, reducing energy consumption while ensuring reliable reception.
Solution Approach 2:
The system implements a feedback mechanism where the group management server tracks the dormant state of devices and coordinates message sending timing. The server receives status information from devices and adjusts message delivery accordingly, ensuring messages are sent when devices are awake and able to receive them.
2Reliability
If messages are resent or buffered by application server or transmission network, then message delivery reliability is improved, but performance consumption increases and resource occupation rises
Solution Approach 1:
The group management server pre-configures the message sending period interval and TMGI to group members before they enter dormant state. This allows devices to wake up at the correct time and receive messages without continuous monitoring, reducing energy consumption while ensuring reliable reception.
Solution Approach 2:
Capability-limited devices autonomously manage their own dormant and active states based on the configured message sending period interval. They wake up at the appropriate time to receive messages and return to dormant state afterward, eliminating the need for continuous network monitoring or server-side resending operations.
3Adaptability or versatility
If oneM2M or 3GPP network uses existing multicast mechanisms, then group multicasting capability is provided, but periodic message sending to groups is not supported
Solution Approach 1:
The group management server serves multiple functions: it manages group membership, configures message sending parameters, coordinates with the 3GPP network for MBMS resource allocation, and tracks device states. This multi-functional approach enables periodic message sending while leveraging existing multicast infrastructure.
Solution Approach 2:
The group management server acts as an intermediary between the application server and the 3GPP network's MBMS system. It translates periodic message sending requirements into network-compatible operations, managing the complexity of coordinating dormant device schedules with network resource allocation.
Data Source
AI summary
A message sending method includes obtaining, by a group management server, a message sending period interval corresponding to a first group. The the message sending period interval includes a start time and an end time. The method also includes sending, by the group management server, the message sending period interval to a group member of the first group. The method further includes receiving, by the group management server, a first message sent by an application server. The method additionally includes sending, by the group management server, the first message to the group member of the first group within the message sending period interval.