Small Data Transmission Across Multiple BWPs Using Configured Grants
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems limit small data transmission (SDT) techniques to a single bandwidth part (BWP), restricting flexibility, power, and spectral efficiency.
Innovation Solution
Implementing SDT procedures through contention-free random access (CFRA) or contention-based random access (CBRA) resources, using Type-1 or Type-2 configured grants (CG) resources, and allowing switching between bandwidth parts (BWPs) for SDT data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SDT is limited to a single bandwidth part (BWP), then the procedure is simple, but flexibility and spectral efficiency are reduced
Solution Approach 1:
The patent segments the bandwidth into multiple bandwidth parts (BWPs) and allows the UE to be configured with multiple BWPs for SDT operations. This segmentation enables the system to allocate different BWPs for different SDT procedures (e.g., first BWP for initialization, second BWP for data transmission), thereby improving flexibility without overwhelming complexity in the core mechanism.
Solution Approach 2:
The patent introduces dynamic BWP switching capability where the UE can transition from a first BWP to a second BWP during the SDT procedure based on network triggers. This dynamic adaptation allows the system to optimize spectral efficiency by selecting appropriate BWPs for different transmission stages while maintaining manageable procedure complexity through structured transition mechanisms.
2Productivity
If multiple resource types are used for SDT, then spectral efficiency improves, but power consumption increases
Solution Approach 1:
The patent makes the random access channel (RACH) procedure universal by enabling it to serve multiple functions: both for traditional connection establishment and for SDT initialization. The UE can use RACH resources for SDT procedure initialization and then continue with configured grant (CG) resources, allowing a single mechanism to handle multiple transmission needs and improving spectral efficiency without requiring separate dedicated channels for each function.
Solution Approach 2:
The patent merges the SDT initialization phase with the random access procedure and combines it with configured grant resources for the data transmission phase. This merging allows the system to utilize existing RACH infrastructure for SDT setup and then leverage CG resources for efficient data delivery, achieving improved spectral efficiency while avoiding the need for entirely separate transmission mechanisms that would consume additional power.
3Productivity
If BWP switching is enabled for SDT, then spectral efficiency improves, but procedure complexity increases
Solution Approach 1:
The patent introduces network triggers as intermediaries that coordinate BWP switching between the first BWP and second BWP. These triggers act as mediators that signal the UE when to switch BWPs, ensuring that the switching occurs at appropriate moments in the SDT procedure. This intermediary mechanism enables spectral efficiency improvements through coordinated BWP switching while managing procedure complexity by providing clear switching criteria rather than requiring autonomous decision-making.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A network entity may transmit small data transmission (SDT) initialization information in a first message of a random-access procedure, wherein the SDT initialization information indicates an identification of the network entity for association with an SDT procedure. The network entity may transmit SDT data after completion of the random-access procedure and as part of the SDT procedure, wherein transmission of the SDT data is over a configured grant resource set.