Server Radio Node Beamforming for Wireless Signal Detection
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Solution Overview
Problem
In high-frequency wireless communication networks, such as Millimeter-Wave systems, traditional beamforming methods for detecting random access signals from client radio nodes are inefficient, leading to high overhead and interference due to the need for repeated transmissions in unknown directions.
Innovation Solution
Implementing a receiving time-spatial sweeping pattern for server radio nodes and a corresponding transmitting time-spatial pattern for client radio nodes, based on a predefined rule, to ensure that signals are transmitted only when the server radio node's beam is directed towards the client node, reducing the need for repeated random access preamble transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If beam sweeping is applied to detect random access signals in all directions, then the server radio node can detect signals from any direction, but the overhead and interference increase significantly
Solution Approach 1:
The server radio node performs receiving beam sweeping in advance to establish a beam correspondence relationship between uplink and downlink beams. This preliminary action allows the node to determine the optimal receiving beam for each client radio node before random access occurs, eliminating the need for exhaustive beam sweeping during random access detection and significantly reducing overhead.
Solution Approach 2:
The patent changes the operational parameters by establishing beam correspondence relationships that map downlink beam directions to uplink receiving beam directions. This parameter mapping allows the system to predict and pre-configure the optimal receiving beam based on the downlink beam used for signal transmission, avoiding the need to test all possible beam directions during random access.
2Reliability
If multiple receiving beams are swept for each client radio node, then signal detection reliability improves, but interference to other nodes increases
Solution Approach 1:
Instead of applying uniform beam sweeping to all directions, the patent applies local quality by using the pre-established beam correspondence relationship to select only the specific receiving beam that corresponds to the downlink beam direction. This localized beam selection maintains high signal detection reliability for the target client radio node while minimizing interference to other nodes in different directions.
3Ease of operation
If traditional omnidirectional reception is used for random access, then the system is simple to operate, but signal detection fails in high frequency bands with large propagation loss
Solution Approach 1:
The patent applies preliminary action by pre-establishing beam correspondence relationships between downlink and uplink beams before random access occurs. This allows the server radio node to automatically determine the optimal receiving beam direction based on the downlink beam used, maintaining ease of operation without requiring complex real-time beam searching while ensuring reliable signal detection in high frequency bands.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces overhead and interference, improving the capacity and signal quality of the wireless communication network by allowing the client radio node to transmit signals efficiently when the server radio node's beam is targeted, thereby enhancing beamforming gain.
Implementation Method 1
Beamforming is a signal processing technique used for directional signal transmission or reception. This is achieved by combining antenna elements in a phased array in such a way that signals at particular angles experience constructive interference while others experience destructive interference.
Implementation Method 2
Wireless communication networks or systems, such as Millimeter-Wave (MMVV) wireless systems, operating at high frequencies from 30-300 GHz, are emerging as a promising technology to meet exploding bandwidth requirements by enabling multi-Gb/s speeds.
Data Source
AI summary
The invention relates to a server radio node (110) and a client radio node (120) and methods performed in the server radio node (110) and the client radio node (120) for receiving and transmitting signals in a wireless communication network (100) are provided. The server radio node (110) determines a receiving time-spatial sweeping pattern for the server radio node (110). The client radio node (120) determines a transmitting time-spatial pattern based on a predefined rule. The server radio node (110) receives the signals from the client radio node (120) based on the receiving time-spatial sweeping pattern. The signals are transmitted by the client radio node (120) according to the determined transmitting time-spatial pattern.