User Equipment Scheduling Request Counter Management
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Solution Overview
Problem
In communication systems, user equipment (UE) experiences increased failure probability and delay in scheduling request (SR) procedures due to listen-before-talk (LBT) failures and counter threshold exceedances when no uplink resources are available, leading to inefficient SR transmission.
Innovation Solution
The UE implements counter management by skipping or resetting counters and controlling timers based on specific conditions, allowing immediate SR transmission on available resources and reducing failure probabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs LBT procedure to monitor whether the frequency is occupied before transmitting SR, then the SR transmission reliability is improved, but the SR transmission delay increases and failure probability increases
Solution Approach 1:
The patent applies preliminary action by having the UE perform LBT procedure in advance before the SR transmission opportunity. The UE monitors whether the frequency is occupied prior to attempting SR transmission, and only proceeds with transmission if the channel is clear. This advance monitoring resolves the contradiction by ensuring reliability through pre-checks while avoiding delays from repeated failed attempts.
2Productivity
If the UE continuously attempts SR transmission when no uplink resource is available, then the SR transmission opportunity is maximized, but the counter threshold is exceeded and failure probability increases
Solution Approach 1:
The patent implements feedback mechanisms where the UE monitors the outcome of SR transmission attempts and adjusts its behavior accordingly. When the UE detects that SR transmission fails due to channel occupancy or counter threshold exceedance, it receives feedback information and modifies its transmission strategy, thereby avoiding continuous failed attempts while maximizing successful transmission opportunities.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting transmission parameters such as counter thresholds and timing based on the current channel conditions and SR transmission history. The UE modifies its SR transmission behavior by changing parameters like maximum transmission attempts, timing intervals, and resource selection criteria to optimize both productivity and reliability under varying network conditions.
3Measurement precision
If the UE increments the first counter for each SR transmission attempt, then the SR failure detection is improved, but the SR procedure failure probability increases when LBT fails
Solution Approach 1:
The patent applies segmentation by dividing the SR transmission process into distinct phases with separate counting mechanisms. The first counter tracks SR transmission attempts, while a second counter specifically tracks LBT failures. This segmentation allows for more precise measurement of different failure modes while reducing the overall failure probability by enabling selective retransmission strategies based on the specific type of failure detected.
Data Source
AI summary
Embodiments of the present invention provide a resource request method and user equipment. The method includes: obtaining first information when UE triggers a scheduling request SR; and executing, by the UE based on the first information, any one of the following actions: at least one of skipping increasing counting of a first counter and increasing counting of a second counter, and at least one of stopping a timer and prohibiting starting a timer, where the first information is used to indicate that the UE has currently stopped transmitting the SR, the UE is unable to transmit the SR on an SR resource within a duration corresponding to the timer, the first counter is used to record a count of transmitting the SR, and the second counter is used to record a count of stopping transmitting the SR.