Conditional Small Data Transmission in Inactive States
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Solution Overview
Problem
Existing wireless communication networks face challenges in optimizing bandwidth usage and reducing power consumption due to interference and inefficient handling of small data transmissions, particularly in scenarios where user equipment (UE) needs to transition to active states for data transfer.
Innovation Solution
Implementing enhanced small data transmission (SDT) operations, including conditional transmission based on predefined conditions, allowing UEs to transmit small data bursts without entering full active states, using pre-configured resources and managing transmission delays to optimize bandwidth and power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE enters full active state for data transfer, then data transmission reliability is improved, but power consumption increases
Solution Approach 1:
The patent segments the data transmission process into two types: small data transmissions that can be handled in idle/inactive states without full active state activation, and large data transmissions that require full active state. This segmentation allows the system to maintain reliability for small data while avoiding the power consumption penalty of full active state for all data types.
Solution Approach 2:
Instead of requiring full active state for all data transmissions, the patent applies partial action by enabling limited data transmission capabilities in inactive state. The UE can perform small data transmissions using simplified procedures (such as configured grants or two-step random access) that do not require full active state activation, thus reducing power consumption while maintaining sufficient reliability for small data loads.
2Speed
If UE transmits small data immediately, then transmission speed is improved, but bandwidth usage efficiency deteriorates
Solution Approach 1:
The network performs preliminary configuration by setting up dedicated SDT resources, configured grants, or two-step random access procedures in advance. This preliminary setup allows the UE to transmit small data immediately when ready, without waiting for full active state activation or bandwidth allocation, thus maintaining high transmission speed while improving bandwidth efficiency through pre-configured resource usage.
Solution Approach 2:
The patent changes the transmission parameters by introducing new SDT-specific parameters such as maximum SDT data size, timing windows, and resource allocation patterns. These parameter changes enable the system to optimize between transmission speed and bandwidth efficiency by adjusting parameters like transmission timing, data size thresholds, and resource reservation mechanisms.
3Reliability
If network provides dedicated SDT resources, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements multi-functionality by designing SDT mechanisms that can operate within existing network frameworks (RRC inactive state, configured grants, two-step random access). The same SDT resources and procedures can serve multiple purposes: small data transmission, power saving mode operation, and network resource optimization. This universality improves reliability for small data while avoiding the complexity of entirely separate dedicated infrastructure.
4Loss of energy
If UE delays SDT transmission to optimize conditions, then bandwidth efficiency is improved, but transmission time increases
Solution Approach 1:
The patent introduces dynamic decision-making at the UE side, where the transmission timing is adjusted based on real-time conditions such as data availability, network load, and configured parameters. The UE can dynamically choose to transmit immediately when conditions are favorable or delay transmission to optimize bandwidth efficiency, based on the specific SDT configuration and current network state. This dynamic approach balances bandwidth efficiency and transmission time flexibly.
Data Source
AI summary
In one aspect, a method of wireless communication includes receiving, by a user equipment (UE), small data transmission (SDT) configuration information. The method also includes obtaining, by the UE, data for transmission via SDT and SDT parameter information associated with the data for transmission via SDT. The method includes determining, by the UE, a SDT transmission delay based on the SDT parameter information for the data and based on the SDT configuration information. The method further includes transmitting, by the UE, a SDT based on one or more SDT conditions and including the data after the SDT transmission delay. Other aspects are described and claimed.