Delegate-Based Group Channel Access for M2M Collision Reduction
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Solution Overview
Problem
Machine-to-machine communication systems face network congestion and inefficient channel access due to a large number of devices trying to access the channel simultaneously, leading to increased collision probability and control signaling overhead.
Innovation Solution
A delegate-based group channel access method that groups M2M devices with common characteristics and assigns a delegate to perform channel access on behalf of the group, reducing peer-to-peer communication and coordinating backoff slots to avoid collisions and minimize signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large number of M2M devices access the channel simultaneously, then the system supports more devices, but the collision probability and control signaling overhead increase
Solution Approach 1:
The patent segments M2M devices into groups and assigns a dedicated delegate to each group responsible for channel access on behalf of all members. This segmentation reduces the number of simultaneous access attempts from individual devices to group level, thereby reducing collision probability while maintaining support for large numbers of devices.
Solution Approach 2:
The patent introduces a delegate as an intermediary between M2M devices and the base station. The delegate performs channel access procedures for the entire group, acting as a mediator that consolidates multiple device access requests into a single group-level access attempt, thus reducing collisions and signaling overhead.
2Ease of operation
If each M2M device communicates with the base station one by one, then the channel access is simplified, but network congestion occurs
Solution Approach 1:
The patent merges the channel access operations of multiple M2M devices into a single group-level access process. By combining individual device access requests into group-level requests handled by a delegate, the system maintains operational simplicity while significantly improving network throughput and reducing congestion.
Solution Approach 2:
The delegate performs multiple functions including channel access representation, coordination of group members, and interaction with the base station on behalf of the entire group. This multi-functionality simplifies the overall system operation while enabling efficient handling of multiple devices simultaneously.
3Adaptability or versatility
If peer-to-peer communication is used among M2M devices, then device coordination is enabled, but control signaling overhead increases
Solution Approach 1:
The patent extracts the coordination function from peer-to-peer device communication and relocates it to the delegate-base station communication interface. The delegate handles all coordination tasks with the base station, eliminating the need for M2M devices to communicate with each other, thereby significantly reducing control signaling overhead while maintaining coordination capability.
Data Source
AI summary
A delegate-based group channel access method is disclosed for machine-to-machine (M2M) communication. The delegate-based group channel access method groups M2M devices having common characteristics together, assigns a single delegate or multiple delegates from the group according to some criteria, and uses the assigned delegate to perform channel access. This method avoids unnecessary peer-to-peer communication between M2M devices, reduces the probability of collision on the channel during initial channel access, and reduces the control signaling overhead. The, delegate-based group channel access method also coordinates the number of slots to backoff so that all M2M devices in the group keep pace with the delegate.