Relay UE System Information Forwarding for Remote UEs
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Solution Overview
Problem
In wireless communication systems, when a remote UE is linked to a relay UE, there is a challenge in synchronizing system information across different cells, leading to inefficient battery consumption and communication efficiency, especially when the remote UE and relay UE are in different cells.
Innovation Solution
The relay UE receives the serving cell identity of the remote UE and forwards system information only if it determines that the remote UE needs it, thereby optimizing battery consumption and communication efficiency by avoiding unnecessary data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the relay UE forwards system information to the remote UE, then the remote UE can behave according to the system information of the relay UE's cell, but battery consumption increases and communication efficiency decreases due to redundant transmission
Solution Approach 1:
The relay UE performs preliminary action by checking whether system information needs to be forwarded before actually transmitting. The relay UE determines whether to forward system information based on pre-established conditions (such as whether the remote UE is in the same cell), thereby avoiding unnecessary transmission and saving battery energy while ensuring reliable synchronization when needed.
2Reliability
If the relay UE forwards system information to the remote UE, then system information synchronization is improved, but communication efficiency decreases due to redundant data transmission
Solution Approach 1:
The relay UE performs preliminary determination before forwarding system information. By checking conditions such as whether the remote UE is in the same cell beforehand, the relay UE avoids redundant transmissions that would reduce communication efficiency, while still ensuring synchronization is established when necessary.
Solution Approach 2:
The system applies local quality by tailoring the system information forwarding behavior to specific local conditions. The relay UE adjusts its action based on whether the remote UE is in the same cell or not, providing appropriate handling for different local scenarios rather than uniformly forwarding information in all cases.
3Reliability
If the relay UE continuously monitors and forwards system information, then system information synchronization is maintained, but battery consumption increases
Solution Approach 1:
The relay UE performs preliminary checks before initiating system information forwarding. By determining in advance whether forwarding is necessary based on cell identity and other conditions, the relay UE avoids continuous monitoring and transmission operations that would deplete battery life, while still maintaining synchronization reliability when conditions require it.
Data Source
AI summary
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for forwarding system information for a remote UE by a relay UE in wireless communication system, the method comprising: establishing a link between a remote UE and the relay UE for communicating between the remote UE and the network via the relay UE; receiving assistance information including a serving cell identity of the remote UE from the remote UE; checking whether a serving cell identity of the relay UE and the serving cell identity of the remote UE are same or not; and forwarding system information block (SIB), which was already received by the relay UE from the network, to the remote UE via the link if the serving cell identity of the relay UE and the serving cell identity of the remote UE are different. The UE is capable of communicating with at least one of another UE, a UE related to an autonomous driving vehicle, a base station or a network.