Small Data Transmission BWP Selection for Mid-Range IoT
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Solution Overview
Problem
Current machine type communication (MTC) and narrow band internet of thing (NB-IoT) technologies struggle to meet the speed and latency requirements of mid-range IoT devices, such as those used in video surveillance and industrial sensor monitoring, which necessitate speeds ranging from 10 Mb/s to 100 Mb/s and higher latency tolerance.
Innovation Solution
A transmission method for small data transmission (SDT) that determines a target bandwidth part (BWP) from a plurality of initial BWPs configured for a terminal, allowing it to perform uplink or downlink SDT on either a first or second initial BWP based on predefined rules or network indications, ensuring optimal bandwidth utilization and congestion reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple initial BWPs are configured for Redcap terminal, then bandwidth requirements for SDT are ensured and congestion on Initial BWP is reduced, but the problem arises of which BWP should be used for SDT
Solution Approach 1:
The terminal autonomously determines the target BWP for SDT by evaluating whether the second initial BWP is configured with SSB and paging message. This self-service mechanism eliminates the need for external network guidance in routine scenarios, resolving the BWP selection complexity while maintaining high SDT efficiency through automated decision-making based on pre-configured parameters.
Solution Approach 2:
The network device pre-configures the second initial BWP with specific parameters including SSB and paging message indicators before the terminal performs SDT. This preliminary configuration enables the terminal to make rapid BWP selection decisions without real-time network intervention, thus improving SDT efficiency while reducing operational complexity during actual transmission.
2Speed
If MTC and NB-IoT technologies are used, then low speed scenarios are supported, but the speed requirements of mid-range IoT devices (10 Mb/s to 100 Mb/s) cannot be met
Solution Approach 1:
The patent introduces a new BWP configuration parameter system specifically for Redcap terminals, allowing dynamic adjustment of bandwidth parameters to achieve transmission speeds from 10 Mb/s to 100 Mb/s. By modifying BWP parameters including configuring a second initial BWP with specific bandwidth characteristics, the system adapts to mid-range IoT speed requirements while maintaining compatibility with existing MTC and NB-IoT frameworks through standardized interface protocols.
3Productivity
If a separate SDT BWP is configured, then bandwidth requirement for small packet transmission is ensured and congestion on Initial BWP is reduced, but the complexity of BWP management increases
Solution Approach 1:
The patent segments the BWP management into two distinct parts: a first initial BWP for general operations and a second initial BWP specifically for SDT. This segmentation allows independent optimization of each BWP's parameters and reduces the coupling between general BWP management and SDT-specific requirements. The terminal only needs to evaluate one key condition (SSB and paging message configuration) to determine the target BWP, significantly reducing management complexity while ensuring efficient small packet transmission.
Data Source
AI summary
A transmission method for small data transmission (SDT) is performed by a terminal, and includes: determining, in response to the terminal being configured with a plurality of initial bandwidth parts (BWPs), a target BWP, from the plurality of initial BWPs, for a SDT performed by the terminal; and performing, based on the target BWP, the SDT.