Beam Forming Measurement Signaling via Excess Bandwidth
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Solution Overview
Problem
In wireless communication systems, the high number of antenna elements required for beam forming leads to challenges in handling received data efficiently, particularly due to limited interface capacity, which restricts the aggressiveness of beam forming and increases costs when extra bandwidth is allocated.
Innovation Solution
The solution involves using excess bandwidth on the REC-RE interface to send measurement signals with limited or no real-time beam forming, allowing for delayed data transmission, which enables better information retrieval for subsequent uplink subframes by storing additional data samples and sending them when interface capacity is available.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If beam forming is performed with a large number of antenna elements, then the antenna area is sufficiently large for high frequencies, but the handling of received data becomes complex and interface capacity is exceeded
Solution Approach 1:
The patent segments the received data from multiple antenna elements into separate data streams, where each stream corresponds to a specific antenna element or group of elements. This segmentation allows the system to handle data in manageable portions rather than as a single large dataset, reducing interface capacity requirements while maintaining the benefits of multiple antenna elements for beam forming at high frequencies
Solution Approach 2:
The patent extracts only the necessary data from the full set of antenna element signals by performing beam forming operations that combine signals from multiple elements into focused beams. This extraction process removes redundant information and transmits only the essential beam-formed data over the interface, reducing data handling complexity while preserving the antenna area benefits
2Quantity of substance
If extra bandwidth is allocated to the interface for sending more beams, then more beam data can be transmitted, but the cost increases
Solution Approach 1:
The patent applies partial action by transmitting only the necessary portion of beam data that is required for current reception needs, rather than transmitting all possible beam data. This selective transmission reduces the bandwidth required on the interface while still providing sufficient data for effective beam forming operations, thereby reducing costs without sacrificing reception quality
3Productivity
If beam forming is performed aggressively with narrow beams, then reception efficiency is improved, but rays falling outside the beams are lost and detection capability is reduced
Solution Approach 1:
The patent performs preliminary beam forming operations at the antenna element level to create initial beam directions, then uses the remaining interface capacity to transmit additional data about rays that fall outside these primary beams. This preliminary action ensures that the most important directional information is captured first, while still preserving information about other potential signal sources for later processing or alternative beam formation strategies
Data Source
AI summary
The solution described herein relates to using excess bandwidth on an interface to send measurement signals without or with limited beam forming in non-real time, i.e. allowing a delay. A Radio Equipment, RE and a method therein is provided. The method comprises receiving information on a plurality of antenna elements; deriving, from the received information, based on at least one beamforming matrix; information received in at least one pay-load beam, and providing the derived information to the REC over the interface. The method further comprises storing part of the received information not comprised in the at least one pay-load beam; and, when there is available capacity on the interface, given the providing of the derived information, at least part of the stored information is provided to the REC over the interface.