Wireless Control Information Allocation Using Distinct Cell ID Patterns
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Solution Overview
Problem
In wireless communication systems, particularly in LTE, the existing methods for transmitting control information are inefficient due to overlapping patterns from different base stations, leading to interference and reduced system performance.
Innovation Solution
A method where control information is allocated onto specific radio resource regions using distinct patterns for each base station, determined by unique identity information such as physical or virtual cell IDs, random seed values, and scrambling IDs, ensuring non-overlapping configurations to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control information is allocated using the same pattern from multiple base stations, then resource utilization is simplified, but interference increases and transmission reliability deteriorates
Solution Approach 1:
Each base station is assigned a unique identification value that locally determines its specific allocation pattern for control information. This ensures that while the overall system uses standardized patterns, each base station's local allocation is distinct, preventing interference between neighboring base stations transmitting on the same resources.
Solution Approach 2:
The allocation pattern is dynamically adjusted by changing parameters such as resource block indices and subframe offsets based on the base station's identification value. This parameter variation ensures that overlapping base stations use different time-frequency resources for control information, reducing interference while maintaining systematic allocation.
2Reliability
If distinct allocation patterns are used for each base station to reduce interference, then transmission reliability improves, but system complexity increases
Solution Approach 1:
A universal pattern set is defined that can serve multiple base stations, with each base station selecting from this common pool based on its identification value. This universal framework reduces overall system complexity while still providing distinct allocations for each base station through systematic selection from the shared pattern set.
Solution Approach 2:
Each base station autonomously determines its allocation pattern by applying its own identification value to the standardized pattern formulation rules. This self-service mechanism eliminates the need for complex centralized coordination, reducing system complexity while ensuring unique allocations for interference avoidance.
3Productivity
If control information allocation patterns overlap between base stations, then resource efficiency is maintained, but interference increases and reduces system performance
Solution Approach 1:
The time-frequency resource space is segmented into multiple allocation patterns, each associated with a specific base station identification value. This segmentation ensures that while the overall resource space is efficiently utilized, overlapping base stations are assigned to different segments, preventing interference while maintaining high resource utilization through systematic pattern distribution.
Data Source
AI summary
The present invention relates to a method for enabling user equipment to receive control information in a wireless communication system, comprising the steps of: receiving, from a first base station, first control information in which the control information is allocated on a specific wireless resource area according to a first pattern; and receiving from a second base station, second control information in which the control information is assigned on the specific wireless resource area according to a second pattern, wherein the first pattern is determined on the basis of identification information associated with the first base station, the second pattern is determined on the basis of identification information associated with the second base station, and the first and second patterns are set so as not to overlap each other.