Transmitter Protection via Spatial Combining for Hitless RF Switching
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Solution Overview
Problem
Traditional protection schemes in wireless communications, such as 1+1 and 1+N, suffer from time delays when switching between active and standby radio frequency units, compromising the reliability and availability of wireless communications networks.
Innovation Solution
Implementing spatial combining techniques that synchronize the phase and amplitude of wireless signals from multiple radio frequency units to form a continuous beam, allowing for seamless transition and continued transmission even if one unit fails or falls below performance standards, thereby enhancing redundancy and reducing downtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional 1+1 or 1+N protection schemes are used with standby radio frequency units, then redundancy and availability are improved, but time delay occurs during switching between active and standby units
Solution Approach 1:
The patent applies preliminary action by pre-synchronizing multiple radio frequency units before failure occurs. The system continuously monitors and adjusts phase and amplitude parameters of multiple RF units in advance, so that when a failure detects, the backup units are already prepared and can immediately take over without switching delay. This eliminates the traditional standby-to-active transition time.
Solution Approach 2:
The patent merges multiple radio frequency units into a unified transmission system through spatial combining. Instead of having separate active and standby units, multiple RF units are combined to form a single coherent beam, where all units contribute simultaneously to the transmission. This merging eliminates the need for switching between units while maintaining redundancy.
2Reliability
If multiple radio frequency units operate independently with separate antennas, then redundancy is provided, but signal combining requires precise phase and amplitude synchronization
Solution Approach 1:
The patent implements feedback mechanisms that continuously monitor the phase and amplitude parameters of multiple radio frequency units. The system uses this feedback information to automatically adjust and synchronize the RF units in real-time, maintaining precise coherence without manual intervention. This feedback loop simplifies the synchronization process by making it adaptive and self-correcting.
Solution Approach 2:
The patent changes the operational parameters of multiple RF units dynamically to achieve synchronization. By continuously adjusting phase shifts and amplitude levels of each RF unit based on monitored conditions, the system maintains coherent signal combining. This parameter adjustment approach transforms the complex synchronization problem into a manageable real-time control process.
Data Source
AI summary
Various embodiments provide for systems and methods for wireless communications that implement transmitter protection schemes using spatial combining. The protection scheme implemented by some embodiments provides for a number of benefits, including without limitation: hitless protection; constant power monitoring for each wireless channel being utilized; extra gain to wireless signals transmitted; beam steering, beam hopping, and beam alignment capabilities; and varying levels of transmission path protection (e.g., 1+1 protection, or 1+N protection). Additionally, the features of some embodiments may be applied to a variety of wireless communications systems including, for example, microwave wireless systems, cellular phone systems and WiFi systems.