Aiding Wireless Device SSB Transmission for Network Node Communication
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Solution Overview
Problem
In 3GPP Massive Multiple Input Multiple Output (MaMi) systems, wireless devices (WDs) experiencing weak signal conditions or high interference levels struggle to detect synchronization signals from network nodes, hindering connection establishment.
Innovation Solution
A method where a network node configures an aiding WD to transmit Synchronization Signal Blocks (SSBs) in dedicated resources, enabling unconnected WDs to receive synchronization signals and UL resource information, thereby facilitating connection establishment with the network node.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the network node uses codebook based precoders for broadcasted synchronization signals, then the system complexity is reduced, but the antenna array gain is insufficient for weak signal conditions
Solution Approach 1:
The patent introduces an aiding wireless device as an intermediary to transmit synchronization signals. This mediator device receives configuration from the network node and transmits SSB signals with optimal precoding to discoverable devices, resolving the contradiction by enabling high signal strength without requiring the network node to use complex optimal precoders for broadcast signals.
2Illumination intensity
If the network node transmits synchronization signals using massive MIMO with optimal precoding, then the signal strength is improved, but the device complexity increases
Solution Approach 1:
The aiding wireless device acts as a mediator that handles the complex optimal precoding operations. The network node configures the aiding device with the necessary information, and the aiding device performs the signal transmission with optimal precoding, thereby improving signal strength without increasing network node complexity.
Solution Approach 2:
The aiding wireless device creates a copy of the synchronization signal transmission function. Instead of the network node directly transmitting with complex optimal precoding, the aiding device replicates this function by receiving configuration and transmitting SSB signals with the same optimal precoding applied to its antenna array.
3Reliability
If the wireless device transmits pilot signals to establish connection, then the connection establishment is enabled, but the device cannot transmit until it receives synchronization signals
Solution Approach 1:
The network node performs preliminary action by configuring the aiding wireless device to transmit synchronization signals before the discoverable device can establish a connection. This allows the discoverable device to receive synchronization signals and subsequently transmit pilot signals without waiting for traditional connection setup procedures.
Solution Approach 2:
The aiding wireless device serves as an intermediary that provides synchronization signals to discoverable devices. This mediator enables the discoverable device to obtain the necessary synchronization information and transmit pilot signals, thereby enabling connection establishment without the traditional time-consuming setup process.
Data Source
AI summary
A method is disclosed, performed by a network node, for enabling communication with a discoverable WD. The method comprises transmitting, to an aiding WD, a configuration message. The configuration message configures the aiding WD to transmit a Synchronization Signal Block (SSB) signal. The SSB signal being indicative of an Uplink (UL) resource for communicating a response to the SSB signal.