Adaptive Wireless Fronthaul Link for Load-Aware Data Transmission
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Solution Overview
Problem
Current wireless fronthaul links face inefficiencies due to excessive bandwidth requirements and adaptability issues, particularly in aggregating signals from multiple antennas, which leads to increased capacity needs and susceptibility to environmental factors like rain and multi-path fading.
Innovation Solution
A wireless communication link arrangement that determines the present load and transmits only data blocks containing information, using network devices to assess and manage resource elements, thereby optimizing link capacity according to realistic traffic rather than peak traffic, and utilizing adaptive methods to maintain the link quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CPRI protocol is used for wireless fronthaul transmission, then full amplitude and phase information can be transmitted, but bandwidth requirements become excessively large
Solution Approach 1:
The patent extracts and transmits only the essential information from CPRI data blocks - specifically determining whether each data block contains actual information or is empty/null. This selective extraction approach maintains signal fidelity for necessary data while eliminating transmission of redundant empty blocks, thereby reducing bandwidth requirements while preserving full amplitude and phase information where needed.
Solution Approach 2:
Instead of transmitting complete CPRI data blocks continuously, the patent applies partial action by selectively transmitting only those data blocks that contain actual information. The system determines information presence in each block and transmits only the necessary portions, avoiding excessive bandwidth consumption while maintaining reliability for actual signal data.
2Adaptability or versatility
If CPRI protocol is used with constant data rate requirement, then standardized communication is achieved, but adaptability to wireless channel variations is lost
Solution Approach 1:
The patent introduces dynamic adaptation to wireless channel conditions by monitoring signal quality metrics (SNR, fading, rain attenuation) and adjusting the fronthaul transmission accordingly. The system can vary transmission parameters based on real-time channel state, enabling adaptability to environmental factors while maintaining standardized CPRI protocol framework for data format and processing.
3Productivity
If multiple antenna sectors are aggregated in parallel, then coverage capacity increases, but fronthaul capacity requirements increase proportionally
Solution Approach 1:
The patent merges fronthaul data from multiple antenna sectors into a single aggregated stream rather than maintaining separate parallel connections. By processing and combining data blocks from multiple sectors, the system achieves coverage capacity of multiple antennas while reducing overall fronthaul capacity requirements through the selective transmission of only information-containing blocks across the aggregated stream.
Data Source
AI summary
A wireless communication link arrangement may include a first network device and a second network device. The wireless communication link arrangement is arranged for transfer of fronthaul data between these network devices via a wireless communication fronthaul link. Each of said network devices is arranged to constitute a transmitting network device and/or a receiving network device, and at least one network device is arranged to determine the present load on the wireless communication link arrangement. When the present load is determined to exceed a first threshold, at least one network device comprised in the wireless communication link arrangement, is arranged to determine whether data blocks that are intended to be transmitted by a transmitting network device contain information or not, and to instruct said transmitting network device to only transmit data blocks that have been determined to contain information.