URLLC PUSCH Retransmission on Alternate Resources
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Solution Overview
Problem
In ultra-reliable low-latency communication (URLLC) scenarios, high-priority transmissions can interrupt lower-priority transmissions, necessitating retransmission on uninterrupted resources, which is not efficiently addressed by existing technologies.
Innovation Solution
A wireless communication method where a network side configures or obtains configuration parameters for a second transmission of a physical uplink shared channel (PUSCH) on a second resource, allowing for seamless continuation of data transmission after interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-priority transmission interrupts lower-priority transmission in URLLC scenarios, then communication reliability is improved, but transmission efficiency deteriorates due to required retransmission
Solution Approach 1:
The network side pre-configures resource sets and transmission parameters before interruption occurs. When interruption happens, the wireless communication device can immediately switch to pre-configured alternative resources without waiting for new configuration, enabling seamless retransmission and maintaining high transmission efficiency while ensuring reliability through pre-planned backup resources
Solution Approach 2:
The system dynamically selects transmission resources based on interruption events. The wireless communication device monitors transmission status and automatically switches from primary resources to alternative resources when interruption is detected, creating a dynamic resource allocation mechanism that adapts to changing channel conditions and priority requirements
2Reliability
If retransmission is performed on uninterrupted resources after interruption, then data reliability is improved, but transmission latency increases
Solution Approach 1:
Alternative transmission resources and parameters are configured in advance before interruption occurs. When retransmission is needed, the device immediately uses pre-configured resources without waiting for network reconfiguration, significantly reducing the time loss while ensuring data reaches the destination reliably through dedicated uninterrupted resources
Solution Approach 2:
The system skips the traditional reconfiguration delay by using pre-configured alternative resources. Instead of waiting for network control messages to reallocate resources after interruption, the device rushes through the retransmission process using previously allocated backup resources, minimizing latency while maintaining reliability
3Device complexity
If configuration parameters are obtained from first transmission for second transmission, then device complexity is reduced, but adaptability to interruption scenarios deteriorates
Solution Approach 1:
The network side configures multiple alternative resource sets with different parameters that can serve multiple interruption scenarios. A single configuration message contains resource information that can be adapted to various interruption types and durations, making the system universally applicable to different URLLC scenarios while keeping device complexity low through centralized configuration management
Data Source
AI summary
Systems and methods for wireless communications are disclosed herein. In one embodiment, a wireless communication device that a first transmission on a first resource is canceled. In response to determining that the first transmission on the first resource is canceled, the wireless communication device performs a second transmission of a physical uplink shared channel (PUSCH) on a second resource. Configuration parameters of the second transmission of PUSCH on the second resource are configured by a network side or obtained from the first transmission.