Wireless Backhaul for Base Station Coordination
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Solution Overview
Problem
In wireless communications, especially in ultra-dense deployments of 6G+Hz and THz bands, base stations often lack high-capacity wired backhaul links, making it difficult to implement fiber-based connections, particularly for high-altitude moving platforms, which hinders effective mobility management and data transmission/reception within Active Coordination Sets (ACS).
Innovation Solution
A coordinating base station uses a wireless access link to form and manage an Active Coordination Set (ACS) without a wired backhaul, operating as an Integrated Access and Backhaul (IAB)-donor, while coordinated base stations act as IAB-nodes, enabling concurrent communication and joint transmission/reception through radio interfaces, utilizing protocols like BAP for configuration and data exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fiber-based wired backhaul is used between base stations, then high bandwidth and reliable communication is achieved, but deployment cost and complexity increase significantly, especially for ultra-dense networks and high-altitude moving platforms
Solution Approach 1:
The patent replaces the mechanical/fiber-based wired backhaul system with a wireless communication system. Base stations use radio frequency links to establish backhaul connections, eliminating the need for physical fiber optic cables. This substitution enables rapid deployment without civil engineering work, particularly benefiting high-altitude moving platforms where fiber installation is impractical, while maintaining reliable high-bandwidth communication through advanced wireless techniques.
2Ease of manufacture
If wireless backhaul is used between base stations, then deployment ease and adaptability are improved, but bandwidth capacity and connection stability deteriorate
Solution Approach 1:
The patent implements preliminary synchronization and coordination between base stations before actual data transmission. The coordinating base station pre-establishes wireless backhaul links, performs channel estimation, and configures transmission parameters in advance. This preliminary action ensures that when data transmission begins, the wireless connection is already optimized and stable, mitigating the inherent instability of wireless media while maintaining deployment flexibility.
3Productivity
If wired backhaul infrastructure is deployed, then high-capacity data transmission is achieved, but cost and implementation difficulty increase for ultra-dense deployments
Solution Approach 1:
The patent makes the wireless interface universal by enabling it to serve multiple functions simultaneously. The same radio frequency interface used for access communication is also utilized for backhaul transmission between base stations. This multi-functionality eliminates the need for separate wired infrastructure, allowing high-capacity data transmission through wireless links while maintaining ease of deployment. The coordinating base station manages this dual usage by implementing protocol differentiation and resource allocation.
Data Source
AI summary
A first base station communicates with a UE via the first base station and a second base station. The first base station transmits, via a radio interface to the second base station, a configuration for concurrent communication between the UE and a group of base stations including the first base station and the second base station. The first base station communicates, by processing hardware, data over the radio interface directly with the UE, and via the radio interface and the second base stab on.