Transmission Preemption Control for Delay-Sensitive Data
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Solution Overview
Problem
In wireless communication systems, delay-sensitive data often has to wait until scheduled, less sensitive data is transmitted, leading to inefficiencies in resource allocation and increased latency.
Innovation Solution
Implementing a method to preempt resource allocations in wireless communication systems by using variable length transmission time intervals (TTIs), where base stations can dynamically adjust and reallocate resources based on the quality of service (QoS) of data, allowing for immediate transmission of delay-sensitive data by canceling existing grants and assigning new ones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional scheduling is used where resources are allocated and transmitted in sequence, then resource allocation stability is maintained, but delay-sensitive data experiences increased latency and transmission efficiency deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation where the base station can preempt previously allocated resources and reassign them to delay-sensitive data based on real-time QoS requirements. This transforms the static scheduling system into a dynamic one that adapts to changing traffic conditions, allowing delay-sensitive data to obtain resources immediately rather than waiting for pre-assigned time slots.
Solution Approach 2:
The system changes the scheduling parameter from fixed time-division multiplexing to flexible resource allocation based on data priority. By introducing preemption indicators and modifying the scheduling decision parameters, the system can dynamically adjust resource distribution to prioritize delay-sensitive data while maintaining overall system stability through controlled preemption mechanisms.
2Reliability
If resources are pre-allocated to ensure stable transmission, then transmission reliability is improved, but resource utilization efficiency deteriorates when delay-sensitive data arrives
Solution Approach 1:
The patent creates a dynamic resource allocation system that transitions from static pre-allocation to flexible on-demand assignment. The base station monitors incoming data priorities and dynamically preempts resources from low-priority transmissions to allocate to high-priority delay-sensitive data, thereby improving both resource utilization efficiency and maintaining transmission reliability through selective preemption.
Solution Approach 2:
The system modifies the resource allocation parameters by introducing priority-based scheduling weights and preemption thresholds. These parameter changes enable the system to optimize resource utilization by allocating resources to the most time-critical data while maintaining sufficient resources for ongoing transmissions, thus improving productivity without compromising reliability.
3Stability of the object's composition
If existing grants are maintained to ensure continuous transmission, then transmission stability is preserved, but latency for new delay-sensitive data increases
Solution Approach 1:
The patent implements a dynamic grant management mechanism where existing transmission grants can be preempted when delay-sensitive data arrives. The base station evaluates the urgency of new data against ongoing transmissions and dynamically adjusts grant allocations, canceling or shortening existing grants to make resources available for time-critical data while maintaining overall transmission stability through controlled preemption.
Solution Approach 2:
The system performs preliminary assessment of incoming data priority before making preemption decisions. By evaluating QoS parameters and data urgency in advance, the base station can proactively prepare resource reallocation plans that minimize disruption to ongoing transmissions while ensuring delay-sensitive data receives timely resource allocation, thus reducing latency while preserving transmission stability.
Data Source
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AI summary
Techniques are described for preempting resource allocations to one or more UEs in the event that delay sensitive data is received. A configuration to monitor a control channel for a control signal indicating preemption of resources assigned by a previous downlink grant may be received, wherein the configuration comprises an indication of resources to monitor and a periodicity with which the UE monitors the control channel for the control signal. Subsequently, a downlink grant may be received that assigns resources for transmission to the UE. Then, UE may monitor the control channel for the control signal based on the configuration and determine, based at least in part on the control signal, that at least a portion of the resources previously assigned by the downlink grant have been preempted. Finally, the resources assigned by the downlink grant based on the determining may be processed, including refraining from processing the portion of the resources that have been preempted.