Inter-Cell Interference Coordination via UE Service Type Relay
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Solution Overview
Problem
Current wireless communication systems face challenges in providing high reliability and low latency due to increasing data traffic and user demands, necessitating an efficient inter-cell interference coordination method.
Innovation Solution
A method where user equipment (UE) receives service type information from one eNB and relays it to an adjacent eNB, including details on the service type, required SINR, reliability, and latency, allowing the adjacent eNB to protect specific resource regions by adjusting scheduling, using pre-configured search spaces and grants for efficient ICIC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inter-cell interference coordination is implemented to protect specific resource regions, then service reliability and low latency are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring search spaces and grants before actual service delivery. The network pre-sets up ICIC resource regions and signaling structures in advance, so that when high reliability services arrive, the interference coordination mechanisms are already in place and can immediately protect the required resource regions without requiring complex real-time negotiations.
Solution Approach 2:
The patent uses an intermediary approach by introducing a standardized service type information message structure that mediates between different eNBs. This standardized format acts as an intermediary language that simplifies the interaction between cells, reducing the complexity of direct peer-to-peer coordination while maintaining effective interference protection for high reliability services.
2Reliability
If service type information is relayed between eNBs for ICIC, then interference coordination effectiveness is improved, but signaling overhead and network complexity increase
Solution Approach 1:
The patent segments service type information into distinct, standardized fields including service type ID, required SINR level, required reliability level, and required latency level. This segmentation allows each parameter to be independently optimized and transmitted only when necessary, reducing overall signaling overhead while maintaining complete information for effective interference coordination between eNBs.
Solution Approach 2:
The patent changes parameters by defining specific thresholds and standardized values for service type information. Instead of transmitting raw, continuous values, the system uses discrete parameter levels (e.g., required SINR levels, reliability levels) that reduce the amount of signaling data while preserving the essential information needed for ICIC decisions.
3Reliability
If resource regions are protected by stopping scheduling, then service quality is improved, but network resource utilization and productivity decrease
Solution Approach 1:
The patent applies local quality by protecting only specific resource regions that are actually required for high reliability services, rather than broadly restricting scheduling across entire cells. The ICIC mechanism identifies and protects only the particular time-frequency resources where high reliability services operate, allowing other regions to be fully utilized for regular traffic, thus maintaining high network resource utilization while ensuring service quality.
Solution Approach 2:
The patent uses partial action by implementing scheduling restrictions only when and where absolutely necessary for high reliability service protection. Instead of applying blanket scheduling stops, the system selectively applies interference coordination only to the extent needed to meet service requirements, maximizing overall network productivity while maintaining sufficient service quality.
Data Source
AI summary
The method for inter-cell interference coordination of user equipment in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving service type information from a first evolved-NodeB (eNB); and relaying the service type information to a second eNB neighboring the first eNB, wherein the service type information comprises information about a service type to be provided by the first eNB, and may be information requesting protection of a specific resource region allocated for the service type.