Small Data Transmission BSR Management with Configured Delay Timers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication technologies face challenges in managing small data transmission during inactive or idle states, particularly in determining whether to skip uplink transmissions and how to manage small data communication efficiently without transitioning to an active radio connection.
Innovation Solution
Implementing a method where a user equipment (UE) receives a system information block (SIB) and triggers a buffer status report (BSR) with a configured delay timer, and a radio access network (RAN) transmits a SIB with a delay timer configuration for data communication in inactive or idle states, allowing for efficient management of small data transmission without immediate connection transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the UE transmits data in inactive or idle state using Small Data Transmission (SDT), then latency is reduced and connection transitions are minimized, but it is unclear whether to skip uplink transmissions and how to manage buffer status reporting efficiently
Solution Approach 1:
The network configures a delay timer in advance through system information blocks before the UE needs to transmit data. This preliminary configuration enables the UE to autonomously manage buffer status reporting by starting or restarting the timer when data arrives, without requiring real-time network intervention or complex decision-making about whether to report buffer status.
Solution Approach 2:
The UE autonomously manages its own buffer status reporting by utilizing the pre-configured delay timer. When data arrives in the buffer, the UE automatically starts or restarts the timer and triggers BSR transmission accordingly, eliminating the need for complex network-controlled management and reducing signaling overhead.
2Speed
If the UE triggers a buffer status report immediately when data arrives, then data transmission responsiveness is improved, but resource utilization is reduced due to unnecessary transmissions when no uplink grant is available
Solution Approach 1:
The delay timer provides dynamic control over buffer status reporting timing. The UE adapts the BSR transmission timing based on the timer expiration, allowing flexible responsiveness while avoiding premature transmissions. The timer can be adjusted by the network to balance between responsiveness and resource efficiency different SDT scenarios.
3Reliability
If the UE transitions to connected state for data transmission, then reliable data communication is ensured, but latency increases and connection management overhead grows
Solution Approach 1:
The network configures SDT parameters and delay timer values in advance while the UE is in inactive or idle state. This preliminary configuration enables the UE to perform buffer status reporting and data transmission directly in the inactive/idle state using pre-allocated resources, eliminating the need to transition to connected state for small data transmissions.
Data Source
AI summary
A user equipment (UE) receives, from a radio access network (RAN), a system information block (SIB). The UE triggers, when communicating data with the RAN in an inactive or idle state associated with a protocol for controlling radio resources, a buffer status report (BSR) to the RAN; and in response to the triggering and when the SIB includes a configuration of a delay timer for communicating data in the inactive or idle state, the UE starts or restarts the delay timer according to the configuration.