Dual-Tier Wireless System Antenna Segmentation
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Solution Overview
Problem
The scalability of small-cell based wireless communication systems is limited by mutual interference and increased operational complexity as the density of small cells increases, leading to saturation in aggregate throughput and higher costs for electrical and optical infrastructure.
Innovation Solution
A dual-tier wireless communication system is implemented, with a distributed upper tier of service-antennas providing wireless access to mobile terminals and a concentrated lower tier of antenna arrays providing backhaul services, operating in disjoint frequency bands and using channel state information for efficient data transmission and interference mitigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If small-cell density is increased to handle more customers, then wireless access capacity is improved, but mutual interference increases and aggregate throughput saturates
Solution Approach 1:
The system segments the wireless network into two distinct tiers: a distributed upper tier for wireless access and a concentrated lower tier for backhaul. This segmentation allows independent optimization of each tier, enabling the upper tier to provide widespread access while the lower tier manages traffic aggregation efficiently, thereby increasing capacity without proportionally increasing interference.
Solution Approach 2:
The patent introduces a vertical dimension by deploying antenna arrays in a concentrated lower tier that provides backhaul services, while the upper tier operates for wireless access. This dimensional separation allows the system to handle more customers by adding backhaul capacity in a different spatial organization, reducing the mutual interference problem that plagues horizontal densification alone.
2Productivity
If small-cell density is increased to accommodate more customers, then wireless access capacity is improved, but operational complexity increases due to increased handoff rates
Solution Approach 1:
By segmenting functions into upper tier (wireless access) and lower tier (backhaul), the patent reduces handoff complexity. Mobile terminals in the upper tier can maintain connections longer since the distributed antenna configuration provides more consistent coverage, reducing the frequency of handoffs and associated operational complexity.
Solution Approach 2:
The concentrated lower tier acts as an intermediary that aggregates traffic from multiple upper tier antennas. This intermediary structure simplifies mobility management by providing a stable backhaul layer that can handle handoffs more efficiently, reducing the operational burden on the distributed upper tier.
3Productivity
If small-cell density is increased to handle more customers, then wireless access capacity is improved, but infrastructure costs increase due to additional electrical power and backhaul requirements
Solution Approach 1:
The patent merges multiple small-cell functions into a dual-tier architecture where the lower tier concentrates backhaul connections. This merging reduces the total number of separate infrastructure connections needed, as multiple upper tier antennas can share common backhaul resources through the lower tier, thereby reducing electrical power and optical fiber requirements compared to fully distributed small cells.
Solution Approach 2:
The lower tier antenna arrays serve multiple functions: providing backhaul service to upper tier antennas and directly serving stationary terminals. This multi-functionality reduces overall infrastructure requirements by eliminating the need for separate dedicated backhaul infrastructure for each small cell, as the lower tier provides shared backhaul capacity.
Data Source
AI summary
Systems and methods for communicating data over a dual-tier wireless communication system are provided. A dual-tier wireless communication system comprises an upper tier cell-free large-scale antenna system including a plurality of service-antennas distributed in a designated coverage area for providing wireless access service to mobile terminals, and a lower tier of one or more concentrated large-scale antenna system arrays arranged within a plurality of cells of the designated coverage area for providing backhaul service to the plurality of service-antennas. The upper tier and the lower tier operate in disjoint frequency bands with respect to each other.