Relay Node Connection in Wireless Backhaul Systems
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Solution Overview
Problem
In wireless communication systems, especially in dense deployments of 5G or New Radio (NR) systems, establishing efficient wireless backhaul links between relay nodes is challenging due to infrequent synchronization signal transmissions by relay nodes, which hampers the initiation of connection establishment and network access.
Innovation Solution
A method where a first node initiates a connection by transmitting a synchronization signal (SS) even if it doesn't detect such signals from other nodes, and responds to SS transmissions from established nodes to establish a wireless link, using random access requests and responses to configure access parameters for link establishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If relay nodes transmit synchronization signals infrequently to save energy, then power consumption is reduced, but connection establishment becomes difficult
Solution Approach 1:
Instead of the conventional approach where established nodes transmit synchronization signals and new nodes respond, this patent inverts the procedure: the new first node transmits the synchronization signal to initiate connection establishment, and the established second node responds to this signal. This inversion allows the first node to actively trigger the connection process without requiring frequent synchronization signal transmissions from other nodes, thereby reducing power consumption while maintaining reliable connection establishment.
2Reliability
If relay nodes transmit synchronization signals frequently to enable connection establishment, then connection reliability is improved, but power consumption increases
Solution Approach 1:
The first node (new or re-connecting relay node) performs self-service by transmitting the synchronization signal itself rather than relying on other nodes to transmit these signals. This self-initiated approach allows the node to establish connections on-demand without requiring continuous or frequent synchronization signal transmissions from the network, thereby reducing overall power consumption while maintaining the ability to establish reliable connections when needed.
3Productivity
If relay nodes operate in power-saving modes with infrequent transmissions, then energy efficiency is improved, but network access becomes hampered
Solution Approach 1:
The first node performs preliminary action by transmitting the synchronization signal before actual data communication begins. This preliminary transmission initiates the connection establishment process, allowing the node to gain network access on-demand. The established nodes respond to this preliminary signal with random access requests and configuration information, enabling the first node to access the network efficiently without requiring continuous transmissions from other nodes during power-saving modes.
Solution Approach 2:
The patent inverts the traditional access procedure where the network initiates contact with synchronization signals. Instead, the first node inverts this by initiating the process with its own synchronization signal transmission, making network access easier for nodes in power-saving modes as they can actively trigger connection establishment without waiting for network-initiated signals.
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AI summary
Methods, systems, and devices for wireless communications are described that support node connection techniques in wireless systems, such as relay node connections in a wireless backhaul network. A first node, which may be a new node or a node seeking to re-establish a connection, may initiate a connection establishment through transmission of a synchronization signal (SS). The first node, responsive to the SS transmission, may receive a response signal from one of the other nodes, and may establish a link with the other node. In some cases, the response signal may be an SS transmission from the other node, and the first node may transmit a random access request to the other node to initiate establishment of the link. In other cases, the response signal may be a random access request from the other node to initiate establishment of the link.