Low-Latency SR, BSR, and PUSCH Transmission During Measurement Gaps
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Measurement gaps (MGs) in 5G NR networks prioritize mobility over uplink (UL) traffic, leading to increased latency and potential discarding of UL data due to delayed transmission opportunities, which affects reliability and capacity.
Innovation Solution
A method and apparatus for wireless communication that allows transmission of scheduling requests (SR), buffer status reports (BSR), or physical uplink shared channel (PUSCH) data during or outside of measurement gaps based on a configured delay threshold for UL packet data convergence protocol (PDCP) queuing delay, enabling prioritization and efficient handling of UL traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If measurement gaps prioritize mobility over uplink traffic, then mobility performance is improved, but uplink latency increases and reliability deteriorates
Solution Approach 1:
The patent applies dynamics by making the measurement gap configuration adjustable and adaptive. The network can dynamically configure measurement gap patterns and prioritize uplink traffic during critical periods, allowing the system to switch between mobility-focused and reliability-focused modes based on current network conditions and traffic requirements.
Solution Approach 2:
The patent changes parameters such as measurement gap duration, frequency, and timing to optimize both mobility and uplink performance. By adjusting these parameters, the system can reduce uplink latency while maintaining mobility capabilities, resolving the contradiction between the two requirements.
2Measurement precision
If uplink data transmission is delayed during measurement gaps, then measurement accuracy is improved, but packet discard rate increases
Solution Approach 1:
The patent applies preliminary action by having the UE prepare and buffer uplink data packets before measurement gaps occur. The transmission buffer stores packets during measurement gaps, and the system proactively manages buffer status reports to ensure packets are transmitted immediately after gaps without delay, preventing packet discard while maintaining measurement accuracy.
Solution Approach 2:
The patent uses feedback mechanisms where the UE reports buffer status during measurement gaps, and the network responds with scheduling decisions. This feedback loop ensures that packets waiting in the buffer are efficiently scheduled for transmission after the measurement gap, reducing packet discard rates while maintaining measurement precision.
3Ease of manufacture
If measurement gaps are configured with fixed patterns, then implementation simplicity is improved, but uplink capacity is reduced
Solution Approach 1:
The patent transitions from fixed measurement gap patterns to dynamic configurations where the network can adjust gap timing, duration, and frequency based on real-time uplink traffic conditions. This dynamic approach increases uplink capacity while maintaining implementation simplicity through automated network management.
Solution Approach 2:
The patent makes the measurement gap system multi-functional by enabling it to serve both mobility measurements and uplink traffic transmission needs. The same measurement gap framework supports both functions, eliminating the need for separate dedicated channels and increasing overall uplink capacity without complicating implementation.
Data Source
AI summary
Apparatuses and methods for resolving SR, BSR, and/or PUSCH data delay from MG conflict for low latency. An apparatus is configured to obtain a configuration of a delay threshold associated with an UL PDCP queuing delay for a transmission buffer. The apparatus is configured to measure a packet buffer time in which at least one UL data packet is in the transmission buffer, where the at least one UL data packet is associated with a SR, a BSR, or PUSCH data. In addition, the apparatus is configured to transmit, for a network node, at least one of the SR, the BSR, or the PUSCH data during a portion of a MG in a MG interval or outside of the MG based on the packet buffer time being less than or greater than or equal to the delay threshold.