NB-IoT Receiver Status Report Indication for Signaling Overhead Reduction
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Solution Overview
Problem
The NB-IoT network experiences increased system signaling overheads due to low feedback efficiency of status reports at the RLC layer and the need for random access to apply for uplink status report transmission resources.
Innovation Solution
A method where a receiver side device generates and sends indication information to a transmitter side device to determine whether a status report is necessary, allowing for efficient resource allocation and reduced signaling overheads by only sending reports for unsuccessfully received PDUs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If random access is used to apply for uplink status report transmission resources in NB-IoT, then the system can handle the deleted PUCCH channel, but the system signaling overheads are further increased
Solution Approach 1:
The patent combines the status report transmission with the data transmission by allowing the status report to be multiplexed on the same uplink resources as the data transmission. This merging eliminates the need for separate random access procedures to obtain uplink resources for status reports, thereby reducing signaling overhead while maintaining adaptability to the deleted PUCCH channel
Solution Approach 2:
The patent establishes preliminary resource allocation for uplink transmissions, where the network pre-allocates uplink resources that can be used for both data transmission and status report transmission. This preliminary action eliminates the need for random access at the time of status report transmission, reducing signaling overhead while maintaining channel compatibility
2Reliability
If status reports are sent for all transmitted PDUs in NB-IoT, then communication reliability is ensured, but feedback efficiency is low due to the small quantity of PDUs transmitted
Solution Approach 1:
The patent applies local quality by differentiating the feedback mechanism based on the specific transmission context. Instead of uniformly sending status reports for all PDUs, the system selectively generates status reports only when necessary (e.g., when PDUs are unsuccessfully received), optimizing feedback efficiency while maintaining reliability for the small quantity of PDUs characteristic of NB-IoT
Solution Approach 2:
The patent changes the parameter of feedback frequency by introducing conditional status report generation. The status report transmission is controlled by parameters such as successful reception status and resource availability, allowing the system to adapt feedback efficiency to the specific transmission conditions while ensuring communication reliability
Data Source
AI summary
Embodiments provide an Internet of Things transmission optimization method. The method includes: generating, by a receiver side device, first indication information when the receiver side device receives a last PDU sent by a transmitter side device, where the first indication information is indicates whether the receiver side device is to send a status report; and sending, by the receiver side device, the first indication information to the transmitter side device.