System Information Timing Advance for Grouped UE Alignment
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Solution Overview
Problem
In wireless communications systems, user equipment (UEs) may not receive timely timing advance (TA) commands in response to uplink trigger (ULT) messages, leading to decreased communication quality and increased latency.
Innovation Solution
The network entity transmits a common TA command to a group of UEs in response to a common ULT message, followed by unicast signaling with updated TA commands based on UE identifiers to ensure precise timing alignment, reducing latency and improving communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the network entity transmits TA commands individually to each UE, then timing precision for each UE is improved, but system complexity and latency increase
Solution Approach 1:
The patent segments the TA command delivery process into two stages: first transmitting a common TA command to all UEs via group signaling, then providing individual TA adjustments through unicast signaling only when needed. This segmentation allows the system to achieve precise timing for individual UEs without requiring complex individual TA command transmission to every UE, thereby reducing overall system complexity while maintaining timing precision.
Solution Approach 2:
The patent merges the TA command transmission process by combining common TA commands for multiple UEs into a single system information message transmitted via group signaling. This merging approach reduces the number of separate TA command transmissions required, decreasing system complexity and latency while still enabling precise timing control through subsequent unicast adjustments for individual UEs.
2Loss of energy
If the network entity waits for individual TA requests from UEs, then system resource usage is reduced, but communication latency increases
Solution Approach 1:
The patent applies preliminary action by proactively transmitting common TA commands to all UEs in advance through group signaling before individual UE-specific timing adjustments are needed. This preliminary transmission of timing information reduces the waiting time for individual TA requests and minimizes communication latency, while still maintaining efficient system resource usage by only providing detailed unicast TA commands when necessary.
3Adaptability or versatility
If the network entity transmits system information periodically, then all UEs receive timing information, but timing accuracy for individual UEs decreases
Solution Approach 1:
The patent implements dynamics by transitioning from static periodic system information transmission to a dynamic two-stage approach: first broadcasting common TA commands to all UEs, then providing individualized TA adjustments through unicast signaling based on each UE's specific timing requirements. This dynamic approach ensures that timing information is available to all UEs while maintaining high timing accuracy for individual UEs through personalized adjustments.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit an uplink trigger (ULT) message that indicates a request for a network entity to transmit a system information message including timing information for the UE. In response to the ULT message, the UE may receive the system information message indicating a timing advance (TA) command applicable to the UE. In some examples, the system information message may indicate that the TA command is applicable to a group of UEs that include the UE and one or more additional UEs. In some other examples, the system information message may indicate the TA command and a set of one or more additional TA commands, each applicable to a respective additional UE. The UE may communicate with the network entity according to a timing based on the TA command received via the system information message.