Communications Device Search Window Timing for Early Termination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the LTE-A system, especially in the eMTC terminal, there is no suitable solution for determining the start location of a search space window in scenarios where early transmission termination is supported, leading to inefficient monitoring and potential resource conflicts.
Innovation Solution
The proposed solution involves a method where a first communications device determines the start location of a first time window based on information received from a second communications device, allowing the first communications device to monitor control information effectively even in early transmission termination scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the search space window starts to be monitored in the fourth subframe after the end of the PUR, then the monitoring follows the conventional LTE-A solution, but the uplink signal transmission of the UE may be ended and consequently the search space window cannot be monitored
Solution Approach 1:
The patent determines the start location of the search space window before the uplink transmission ends, using preliminary timing calculations based on PUR end location and configured offsets. This ensures the monitoring window is established in advance while the uplink signal is still active, resolving the contradiction between following conventional monitoring timing and maintaining monitoring feasibility during early transmission termination.
2Productivity
If the UE transmits service on preconfigured resource without dynamic downlink control information scheduling, then resource overheads are reduced and data transmission delay is shortened, but there is no suitable solution for determining search space window start location in early transmission termination scenarios
Solution Approach 1:
The patent changes the timing parameters for search space window determination by using offsets relative to PUR end location rather than fixed subframe offsets from PUR start. This parameter adjustment allows the search space window to be properly positioned in early transmission termination scenarios while maintaining the efficiency benefits of preconfigured resource transmission without dynamic scheduling.
3Productivity
If multiple communications devices share the same time-frequency resource, then resource utilization is improved, but resource conflicts may occur without proper coordination of start locations
Solution Approach 1:
The patent applies local quality by allowing each communication device to determine its own search space window start location based on its specific PUR configuration and device identity. This localized determination method enables multiple devices to share the same time-frequency resource efficiently while avoiding conflicts through device-specific timing offsets and configurations.
Data Source
AI summary
This application provides an information processing method and a communications device. An information processing method includes: a first communications device receives first information from a second communications device. The first communications device determines, based on the first information, that a start location of a first time window is a K1th time unit after a start location of a first resource or the start location of the first time window is a K2th time unit after an end location of the first resource. The first resource is a resource used by the first communications device to transmit data, and K1 and K2 are positive integers. The first communications device monitors, based on the determined start location of the first time window, control information sent by the second communications device.