Passive IoT Carrier Grouping to Reduce Tag Access Conflicts
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Solution Overview
Problem
In passive Internet of Things (P-IoT) systems, there is a challenge in effectively indicating a terminal device to trigger carrier excitation for passive network nodes, which are not equipped with power supply devices and rely on environmental energy sources, leading to inefficiencies in communication resource allocation and increased risk of sending conflicts.
Innovation Solution
A communication method and apparatus that utilize a RAN device to determine and indicate specific groups of terminal devices to trigger carrier excitation, allocating different carriers to different groups to reduce conflicts and improve access efficiency, particularly in limited communication resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single carrier is used for all terminal devices to excite P-IoT tags, then device complexity is reduced, but sending conflicts increase and access efficiency decreases
Solution Approach 1:
The patent segments terminal devices into multiple groups based on their access patterns and assigns different carriers to different groups. This segmentation reduces sending conflicts by distributing tag access across multiple carriers, thereby improving overall tag access efficiency while maintaining manageable system complexity through organized group management.
2Productivity
If multiple carriers are allocated to different terminal device groups, then sending conflicts are reduced and access efficiency improves, but device complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring carrier group associations and establishing routing rules before actual tag access operations. The network device maintains a mapping between terminal device groups and specific carriers, allowing efficient carrier selection without real-time complex decision-making, thus improving access efficiency while controlling complexity through advance preparation.
3Device complexity
If carrier excitation is triggered without group indication, then communication resource allocation is simple, but resource utilization efficiency decreases
Solution Approach 1:
The patent applies local quality by assigning specific carriers to specific terminal device groups based on their local characteristics and access patterns. This localized carrier allocation ensures that each group uses the most appropriate carrier for its needs, improving overall communication resource utilization efficiency while maintaining clear allocation rules that prevent excessive complexity.
Data Source
AI summary
A communication method and a related apparatus. In the method, an access network device may determine multiple groups of terminal devices having a capability of exciting a passive Internet of Things tag, and send corresponding first information for each of the multiple groups of terminal devices, where the first information indicates a terminal device in the corresponding group of terminal devices to trigger corresponding carrier excitation. In addition, because the access network device indicates different carriers for different groups of terminal devices, and use of multiple carriers can effectively reduce a possibility of a sending conflict between tags, access efficiency of a tag can be effectively improved when communication resources are limited, for example, a capacity of the tag can be effectively improved when communication resources are limited.