Aggregating M2M Bursts for Downlink Transmission Overhead Reduction
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Solution Overview
Problem
Existing wireless wide area networks face challenges in efficiently managing massive device connectivity and supporting diverse requirements of machine-to-machine (M2M) applications, particularly in transmitting small-burst data with minimal overhead, as current methods waste resources due to fixed-size transmission structures that are not optimized for low-data-rate communications.
Innovation Solution
The network aggregates smaller bursts from multiple M2M devices into a single transmission payload using joint forward error correction (FEC) encoding and cyclical redundancy checks, optimizing payload utilization and reducing overhead by employing a single FEC block and shared CRC across devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed-size transmission structures are used for M2M communications, then transmission reliability is maintained, but resource efficiency deteriorates due to overhead wastage in small-burst transmissions
Solution Approach 1:
The patent combines multiple small-burst transmissions from different M2M devices into a single aggregated transmission block. By merging these small bursts together and applying a single FEC encoding and shared CRC across the combined data, the system maintains transmission reliability while eliminating the overhead wastage that occurs when each small burst is transmitted separately with its own full set of error correction and checksum protocols.
2Reliability
If individual FEC encoding is applied to each device burst, then error correction capability is maintained, but transmission overhead increases due to redundant encoding structures
Solution Approach 1:
The patent merges multiple individual FEC encoding operations into a single joint FEC encoding process. Instead of applying separate FEC codes to each device's small burst (which would create redundant overhead), the system aggregates the bursts and applies one unified FEC encoding that provides equivalent error correction capability across all combined transmissions, thereby reducing overall overhead.
Solution Approach 2:
The aggregated transmission structure serves multiple devices simultaneously with a single encoding framework. The unified FEC block and shared CRC provide universal error protection across all M2M devices in the group, eliminating the need for device-specific encoding structures and reducing overall system complexity.
3Reliability
If separate CRC checks are performed for each burst, then data integrity verification is ensured, but transmission overhead increases due to multiple redundant checks
Solution Approach 1:
The patent combines multiple individual CRC checks into a single shared CRC verification process. By aggregating the data from multiple M2M devices and applying one unified CRC check to the combined transmission, the system ensures data integrity for all devices simultaneously while eliminating the overhead associated with multiple separate CRC fields and verification operations.
Data Source
AI summary
Briefly, in accordance with one or more embodiments, a mechanism disclosed herein groups transmissions to machine-to-machine (M2M) devices in the downlink which can significantly reduce the overhead of transmission. One or more bursts to be transmitted in the downlink to one or more respective devices are aggregated and concatenated into a concatenated burst comprising one or more sub-bursts corresponding to the one or more bursts. The concatenated burst is encoded as a single payload to be transmitted, and the payload is transmitted to the one or more devices such that the devices are capable of decoding their respective sub-bursts in the concatenated burst.