Co-channel Interference List for LTE UEs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In dual-carrier LTE/HSPA systems, blind decoding of PDCCHs from neighboring cells is challenging due to lack of information about scheduled users, complicating interference cancellation and affecting throughput in scenarios with low signal-to-interference ratio.
Innovation Solution
A method where a network node receives information about connected UEs from adjacent nodes, compiles a co-channel interference list, and transmits it to UEs, enabling them to improve decoding performance by reducing search spaces and identifying interfering signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blind decoding of PDCCHs from neighboring cells is performed, then interference cancellation capability is improved, but device complexity and processing requirements increase significantly
Solution Approach 1:
The network node performs preliminary actions by determining the co-channel interference list and transmitting it to the UE before the UE needs to perform blind decoding. This pre-provisioning of interference information significantly reduces the complexity of blind decoding at the UE side, as the UE no longer needs to search all possible PDCCH candidates but can focus only on those indicated in the pre-provided interference list.
2Measurement precision
If information about scheduled users from neighboring cells is obtained, then decoding performance is improved, but loss of information privacy and increased network signaling occur
Solution Approach 1:
The patent applies local quality by providing interference information selectively and locally to each UE based on its specific needs and location. The co-channel interference list is customized for each UE's serving cell and neighboring cell configuration, rather than broadcasting universal scheduled user information to all UEs. This selective information provision improves decoding performance for each UE while minimizing unnecessary information exposure and privacy loss.
3Productivity
If co-channel interference list is transmitted to UEs, then link throughput is improved, but network signaling overhead increases
Solution Approach 1:
The patent extracts only the essential interference information needed for decoding performance improvement and transmits it as a compact co-channel interference list. Rather than transmitting complete scheduled user information or all possible interference parameters, the solution extracts and transmits only the critical elements (interfering cell identities and relevant PDCCH candidates), significantly reducing signaling overhead while maintaining throughput improvement benefits.
Data Source
AI summary
A method for providing co-channel interference information by a network node includes receiving information for at least one user equipment (UE) connected to an adjacent network node, determining a co-channel interference list for user equipment (UE) connected to the network node wherein the co-channel interference list is based on the received information and transmitting the co-channel interference list to a UE connected to the network node.