Network Node Slot Coordination to Reduce Inter-Cell Interference
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Solution Overview
Problem
Inter-cell interference (CLI) occurs due to different operators using subband full duplex (SBFD) and half duplex modes, leading to wasted power and processing resources in UEs and network nodes.
Innovation Solution
Network nodes refrain from configuring or converting symbols or slots for SBFD or downlink/uplink based on overlapping configurations with nearby nodes, reducing CLI and conserving resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If network nodes configure symbols or slots for SBFD or downlink/uplink without considering overlapping configurations with nearby nodes, then communication capacity is improved, but inter-cell interference increases and power/processing resources are wasted
Solution Approach 1:
The network node performs preliminary detection of overlapping symbol/slot configurations with nearby nodes before finalizing its own configuration. The processor determines whether a first symbol or slot overlaps with a second symbol or slot of a nearby network node, and based on this determination, decides whether to configure the first symbol/slot for SBFD or downlink. This preliminary action prevents inter-cell interference from occurring in the first place by avoiding conflicting configurations.
Solution Approach 2:
The system implements feedback mechanisms where network nodes exchange information about their intended configurations with nearby nodes. The processor receives indications from nearby nodes about their symbol/slot configurations and uses this feedback to adjust its own configuration decisions. This feedback loop enables dynamic adaptation to avoid overlapping configurations that would cause interference.
2Reliability
If network nodes proceed with decoding attempts in overlapping symbols or slots, then communication function is maintained, but power and processing resources are wasted
Solution Approach 1:
The network node performs preliminary detection of overlapping configurations before initiating decoding operations. By determining in advance whether a first symbol or slot overlaps with a nearby node's configuration, the system can avoid proceeding with decoding attempts that would be futile due to interference. This preliminary action prevents waste of power and processing resources on unsuccessful decoding operations.
Solution Approach 2:
The system takes preliminary anti-action by preventing the harmful decoding attempts before they occur. Instead of allowing decoding operations to proceed and then wasting resources on failed attempts, the processor proactively prevents the initiation of decoding when overlapping configurations are detected, thereby eliminating the source of resource waste.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may determine that a first symbol or a first slot associated with a first operator of the network node overlaps, at least in part, with a second symbol or a second slot associated with a second operator of a nearby network node. The network node may refrain from configuring or converting the first symbol or the first slot for subband full duplex (SBFD) or downlink based at least in part on the second symbol or the second slot being configured for uplink. Numerous other aspects are described.