Periodic Beam Forming for LTE Inter-Cell Interference Reduction
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Solution Overview
Problem
Current LTE wireless networks face challenges in meeting bandwidth demands due to inter-cell interference, inefficient backhaul utilization, and latency issues, particularly in providing prioritized access for government users and efficiently managing sensor data during emergencies.
Innovation Solution
The implementation of a Periodic Beam Forming system in LTE wireless base stations, which generates and schedules RF beams to cover specific sub-areas of the cell coverage, allowing for efficient data transmission and reception by focusing antennas on user locations only when necessary, and integrating Optimization Servers within the network to reduce latency and improve data processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If RF beams are continuously transmitted to cover the entire cell area, then coverage is improved, but inter-cell interference increases
Solution Approach 1:
The patent implements periodic beam scanning where RF beams are transmitted in alternating intervals between different cells. During a beam scan interval, one cell transmits beams while adjacent cells remain silent, then roles reverse. This periodic action ensures complete coverage over time while eliminating continuous inter-cell interference, as each cell only transmits when adjacent cells are not transmitting.
2Object-generated harmful factors
If beam scanning is implemented to reduce interference, then inter-cell interference is reduced, but data transmission efficiency deteriorates due to periodic silence intervals
Solution Approach 1:
The patent applies preliminary action by performing beam scanning and channel quality measurements during silence intervals before actual data transmission begins. This allows the system to pre-determine the best beams and modulation schemes to use during transmission intervals, ensuring optimal data transmission efficiency is achieved during the active periods without wasting time during scanning intervals.
Solution Approach 2:
The patent implements dynamic adaptation where transmission parameters such as beam selection, modulation scheme, and coding rate are adjusted based on real-time channel conditions measured during beam scanning. This dynamic optimization ensures that when transmission occurs, the system operates at peak efficiency by matching transmission characteristics to current channel quality, compensating for the periodic silence intervals.
3Quantity of substance
If external servers are deployed to provide services, then service capacity is improved, but latency increases due to long packet transit delays
Solution Approach 1:
The patent transitions from a centralized external server architecture to a distributed edge computing architecture where computation and data processing are moved to the network edge, closer to users. This dimensional shift in service deployment location reduces the physical distance packets must travel, thereby reducing latency while maintaining or increasing service capacity through distributed processing across multiple edge nodes.
Data Source
AI summary
The present disclosure is related to a large-scale broadband wireless network capable of providing a very high wireless data capacity, wherein one aspect of the system utilizes a periodic beam forming system. When a wireless base station cell operates a periodic beam forming system, it is necessary to locate each user served by the cell within a sub-area covered by one of the m times N RF beams generated by the system. Methods for locating users within RF beam sub-areas are disclosed herein, where a user may be scheduled for transmission or reception only when an RF beam is focused on the sub-area that covers the user location. The present disclosure pertains to the systems and methods that may be used to process transmissions of and receptions by the baseband system of an LTE wireless base station that employs a periodic beam forming RF and antenna system.