Relay Node Small Data Transmission Mode Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face inefficiencies in small data transmission over relay networks, particularly in the RRC_INACTIVE state, leading to excessive signaling overhead and increased power consumption due to the need for relay nodes to switch between RRC states for data forwarding.
Innovation Solution
A method where a source node determines a small data transmission mode based on messages received from relay nodes, allowing for direct transmission through a cellular link or sidelink, thereby reducing signaling overhead and power consumption by optimizing the RRC state and relay mode for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the relay node enters into RRC_CONNECTED state to forward small data, then the data transmission can be completed, but the signaling overhead increases excessively
Solution Approach 1:
The patent introduces a message mechanism where the source node sends a message to the relay node indicating whether to forward data. This intermediary signaling approach allows the relay node to remain in RRC_INACTIVE state while still enabling controlled data forwarding, thus reducing the excessive signaling overhead associated with full RRC_CONNECTED state transitions.
Solution Approach 2:
The patent changes the operational parameters of the relay node by allowing it to process and forward small data packets while maintaining the RRC_INACTIVE state parameter. This parameter change enables the relay node to perform data forwarding without transitioning to RRC_CONNECTED state, thereby reducing signaling overhead while maintaining transmission capability.
2Productivity
If the relay node enters into RRC_CONNECTED state to forward small data, then the data transmission can be completed, but the power consumption increases
Solution Approach 1:
The message from the source node acts as an intermediary control mechanism that enables the relay node to forward data without transitioning to the power-intensive RRC_CONNECTED state. This intermediary approach allows the relay node to maintain lower power consumption while still fulfilling the data forwarding function.
Solution Approach 2:
By changing the state parameter from RRC_CONNECTED to RRC_INACTIVE during data forwarding operations, the relay node significantly reduces its power consumption. The patent demonstrates that the relay node can successfully forward small data packets while remaining in the lower-power RRC_INACTIVE state.
3Loss of information
If the source node directly transmits small data via Uu air interface, then the signaling overhead is reduced, but the relay node cannot forward data in RRC_INACTIVE state
Solution Approach 1:
The patent introduces dynamic adaptability by enabling the relay node to switch between different transmission modes based on the received message. When the message indicates relay forwarding is needed, the relay node can forward data via PC5 interface even in RRC_INACTIVE state. This dynamic capability allows the system to adapt to different transmission scenarios while maintaining low signaling overhead.
Solution Approach 2:
The relay node is designed with multi-functionality to perform both direct transmission and relay forwarding operations. The patent shows that the relay node can universally handle different transmission modes (direct Uu transmission or relayed PC5 transmission) based on the source node's message, providing versatility while maintaining efficiency.
Data Source
AI summary
The present application provides a method and device for relay wireless communications. A node receives a first message through sidelink; determines a first transmission mode based on at least the first message; transmits a first bit group by adopting the first transmission mode, the first bit group comprises at least one bit; wherein the first transmission mode is one transmission mode in a candidate transmission mode set, the candidate transmission mode set comprises a transmission through cellular link and a transmission through sidelink; the first message indicates a first condition set, and the first condition set comprises at least one condition; when condition(s) in the first condition set is(are) satisfied. The reasonable selection of small data transmission mode in the relay transmission network architecture of the present application can effectively reduce the signaling overhead of the relay node and reduce the power consumption of the relay node.