Downlink Scheduling via Adjacent Uplink Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The introduction of additional TDD configurations in wireless communication networks leads to increased interference, particularly downlink-to-uplink interference, which degrades network performance and makes it challenging to deploy downlink-heavy configurations without disrupting nearby areas.
Innovation Solution
A method where communication devices determine if adjacent carriers are being used for uplink transmissions before sending downlink information, allowing for reduced interference by scheduling transmissions only when uplink activity is absent, thereby minimizing performance loss and enabling the deployment of downlink-heavy configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additional TDD configurations are introduced to enable downlink-heavy deployments, then downlink transmission capacity is improved, but interference to uplink transmissions on adjacent carriers increases
Solution Approach 1:
The base station performs preliminary detection of uplink transmission status on adjacent carriers before initiating downlink transmission. This advance checking allows the system to predict potential interference conditions and adjust scheduling decisions proactively, preventing interference before it occurs
Solution Approach 2:
The downlink transmission scheduling is made dynamic by continuously monitoring uplink transmission status on adjacent carriers. The base station adapts its downlink scheduling in real-time based on detected uplink activity, enabling flexible adjustment of transmission parameters to minimize interference while maximizing downlink capacity
2Productivity
If downlink-heavy configurations are deployed to increase downlink throughput, then network productivity is improved, but reliability of nearby uplink communications deteriorates
Solution Approach 1:
The system implements a feedback mechanism where the base station continuously monitors uplink transmission status on adjacent carriers and uses this information to adjust downlink scheduling decisions. This closed-loop control ensures that downlink transmissions are scheduled only when they will not interfere with ongoing uplink communications, maintaining uplink reliability while maximizing downlink throughput
Data Source
AI summary
Method performed by a first communication device (101) for sending downlink information to a second communication device (102). The first communication device (101) and the second communication device (102) operate in a communications network (100). The first communication device (101) determines (702) whether or not one or more third communication devices (103) operating in the communications network (100) are sending uplink information on an adjacent carrier (142). The adjacent carrier (142) is adjacent to a carrier (141) assigned to the first communication device (101) for sending the downlink information to the second communication device (102). The first communication device (101) sends (703) the downlink information to the second communication device (102) on the carrier (141) when it has determined that the one or more third communication devices (103) are not sending uplink information on the adjacent carrier (142) to the carrier (141).