Base Station Uplink Resource Allocation for IoT Latency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In IoT environments, the challenge is to reduce battery consumption in wireless communication systems, particularly in scenarios where many devices are connected within a single base station coverage, and efficient uplink resource allocation is needed without user intervention, as traditional methods like grant-based and grant-free UL transmissions can lead to increased latency and signaling overhead.
Innovation Solution
The proposed solution involves a base station allocating uplink resources for uplink data related to downlink data without a scheduling request from the terminal, transmitting control information indicating these resources, and dynamically adjusting additional resources based on feedback from the terminal, thereby optimizing resource allocation and reducing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grant-based uplink transmission is used, then uplink resource allocation is reliable, but latency increases due to scheduling request overhead
Solution Approach 1:
The base station performs preliminary action by proactively allocating uplink resources to the terminal before the terminal needs to transmit uplink data. This is achieved by the base station predicting uplink transmission needs based on downlink data patterns and sending uplink grants in advance, eliminating the need for scheduling requests and reducing latency while maintaining reliable resource allocation
2Loss of time
If grant-free uplink transmission is used, then latency is reduced, but resource collisions increase
Solution Approach 1:
The invention introduces feedback mechanisms where the terminal reports buffer status information (BSI) to the base station about its uplink data needs. The base station uses this feedback to dynamically adjust uplink resource allocations, ensuring sufficient resources are provided without over-allocation that could cause collisions. This feedback loop enables the system to achieve low latency similar to grant-free transmission while maintaining resource allocation reliability through informed decision-making
3Manufacturing precision
If traditional scheduling request mechanisms are used, then resource allocation accuracy is high, but signaling overhead increases
Solution Approach 1:
The invention extracts and removes the scheduling request mechanism from the uplink resource allocation process. Instead of requiring terminals to send scheduling requests, the base station directly predicts terminal uplink transmission needs and allocates resources proactively. This extraction eliminates the signaling overhead associated with scheduling requests while maintaining accurate resource allocation through the base station's prediction capabilities based on downlink data patterns and terminal feedback
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method for operating a base station (BS) in a wireless communication system is provided. The method includes transmitting, to a terminal, downlink data, allocating uplink resources for uplink data related to the downlink data without any request from the terminal, and transmitting control information indicating the uplink resources.