Group Common Configured Grant Resource Configuration for URLLC
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Solution Overview
Problem
In current sidelink communications, configured grant resources are only known between a base station and a transmitting UE, while receiving UEs are not aware of these resources, and the base station cannot identify UEs using cell-radio network temporary identifiers, which limits the reliability and latency of ultra-reliable low latency communication (URLLC) in industrial internet of things (IIoT) applications.
Innovation Solution
Implementing group common configured grant resource configuration, where a network provides a group common configured grant configuration for multiple UE devices, determining UE-specific configurations using both group common and UE-specific parameters, enabling transparent data transmission and reception based on these parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If configured grant resources are only known between base station and transmitting UE, then device complexity is reduced, but reliability and latency of URLLC deteriorate
Solution Approach 1:
The patent merges the configuration knowledge of configured grant resources from being exclusively between gNB and Tx UE to include Rx UE as well. The gNB transmits the configured grant configuration to the Rx UE, creating a shared awareness of resource allocations across all relevant parties in the communication chain, thereby improving URLLC reliability without significantly increasing overall system complexity
Solution Approach 2:
The gNB acts as an intermediary that distributes configured grant configuration information to both Tx UE and Rx UE. This intermediary role ensures that all UEs in the group have synchronized knowledge of resource allocations, enabling reliable URLLC communication while maintaining centralized control through the base station
2Loss of information
If configured grant resources are only known between base station and transmitting UE, then information management is simplified, but latency of URLLC deteriorates
Solution Approach 1:
The gNB performs preliminary action by transmitting the configured grant configuration to the Rx UE in advance, before actual data transmission occurs. This ensures that the Rx UE is already aware of the resource allocations and can immediately process incoming URLLC data without waiting for additional signaling, thereby reducing latency
Solution Approach 2:
The patent combines the configuration information distribution to multiple recipients (Tx UE and Rx UE) simultaneously through the gNB, ensuring that all parties have the necessary information available beforehand, which prevents information loss and reduces communication latency for time-critical URLLC applications
3Device complexity
If base station cannot identify UEs using cell-radio network temporary identifiers, then device complexity is reduced, but adaptability of sidelink communication deteriorates
Solution Approach 1:
The gNB utilizes the existing C-RNTI identifier, which is already assigned to each UE for uplink communication, and makes it multi-functional by also using it for sidelink identification and configured grant resource association. This universal use of C-RNTI enables the base station to identify UEs in sidelink mode without introducing new identification mechanisms, maintaining low complexity while improving adaptability
Data Source
AI summary
Various aspects of the present disclosure relate to group common configured grant resource configuration. One apparatus includes at least one memory and at least one processor that is configured to receives a group common configured grant (“CG”) configuration for a group common CG resource, the group common CG configuration for a plurality of UE devices in a group, determine, based on the group common CG configuration, a UE-specific CG resource configuration for the group common CG resource, the UE-specific CG resource configuration comprising one or more group common CG parameters and one or more UE-specific parameters for the group common CG resource, and perform data communications using the group common CG resource according to the group common CG parameters and the UE-specific CG parameters.