Delegate UE UL-WUS Signaling for Group System Information Requests
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Solution Overview
Problem
Existing wireless communication systems, particularly in 5G NR, face inefficiencies in power consumption and overhead due to multiple UEs independently requesting system information, leading to increased network load and energy waste.
Innovation Solution
Implementing a UE cooperation framework where a delegate UE sends a common uplink wake-up signal (UL-WUS) on behalf of a group, using single frequency network transmission or a UE closer to the base station, to request on-demand synchronization signals, reducing redundant requests and optimizing network communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple UEs independently request system information, then each UE can obtain the required information, but power consumption and network overhead increase
Solution Approach 1:
Multiple UEs are grouped into a UE cooperation group where they collectively select a single delegate UE to transmit the UL-WUS on behalf of the entire group. This merging approach consolidates multiple independent requests into one unified transmission, reducing both power consumption and network overhead while ensuring all group members receive the necessary system information.
Solution Approach 2:
A delegate UE acts as an intermediary between the network and other UEs in the cooperation group. The delegate UE receives the UL-WUS configuration from the network, selects the appropriate synchronization signal block, and transmits the wake-up signal for the entire group. This intermediary role eliminates the need for each UE to independently communicate with the network, significantly reducing energy expenditure and signaling overhead.
2Reliability
If multiple UEs independently request system information, then each UE can obtain the required information, but network overhead increases
Solution Approach 1:
The patent merges multiple UEs into a single UE cooperation group that uses one delegate UE for UL-WUS transmission. This consolidation reduces the quantity of signaling messages in the network from multiple independent requests to a single grouped request, thereby reducing network overhead while maintaining reliable system information acquisition for all group members.
3Use of energy by moving object
If a delegate UE transmits common UL-WUS for a group, then power consumption and overhead are reduced, but coordination complexity increases
Solution Approach 1:
The patent segments the UL-WUS transmission function by designating a specific delegate UE within the cooperation group to handle transmission responsibilities. This segmentation simplifies coordination by clearly defining roles: the delegate UE manages UL-WUS transmission based on network configuration, while other UEs in the group focus on receiving and processing signals. This role division reduces overall coordination complexity despite the collaborative nature of the system.
Data Source
AI summary
The apparatus may be a wireless device such as a user equipment (UE) or component thereof configured to transmit, in association with a plurality of related UEs, an uplink (UL) wake up signal (WUS) (UL-WUS) and receive, based on the UL-WUS, system information. The apparatus may be a network node or network device such as a base station or component thereof configured to receive a single UL-WUS for a plurality of related UEs; and transmit, based on the UL-WUS, a plurality of transmissions including system information. The apparatus may be a wireless device such as a UE or component thereof configured to transmit or receive an indication that a second UE will be a delegate UE for a group of UEs including the first UE and receive system information from a network entity, where the system information is triggered by an UL-WUS for the group of UEs.