Semi-autonomous Transmission Resource Allocation
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Solution Overview
Problem
In wireless communication systems, scheduled uplink transmissions face channel access disadvantages due to triple contention scenarios, leading to reduced uplink data rates compared to standalone unscheduled systems, particularly in heterogeneous environments where base stations and user equipment contend for resources.
Innovation Solution
Implementing a semi-static resource allocation mode for unscheduled uplink transmissions, where user equipment operates based on periodic or scheduled resources, reducing channel contention and signaling overhead by using semi-persistent scheduling or cross-transmission opportunity schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If scheduled uplink transmissions are implemented in heterogeneous wireless systems, then resource allocation control is improved, but channel access efficiency deteriorates due to triple contention scenarios
Solution Approach 1:
The patent applies preliminary action by performing channel access procedures (CCA/LBT) before scheduled uplink transmissions. The base station and UE contend for channel access in advance of the scheduled transmission, allowing the system to secure channel rights before data transfer begins. This resolves the contradiction by maintaining scheduled resource allocation control while improving channel access efficiency through proactive channel contention.
2Ease of operation
If autonomous uplink transmissions with fixed resources are implemented, then channel access simplicity is improved, but resource utilization efficiency deteriorates due to channel contention
Solution Approach 1:
The patent applies dynamics by enabling the system to switch between autonomous transmission mode with fixed resources and scheduled transmission mode with dynamic resource allocation. The base station can configure UEs to operate in autonomous mode for simple channel access, then dynamically schedule retransmissions or additional transmissions with optimized resource allocation. This resolves the contradiction by combining the simplicity of autonomous access with the efficiency of scheduled resource utilization.
3Loss of information
If semi-static resource allocation is implemented for unscheduled uplink, then signaling overhead is reduced, but flexibility in resource management deteriorates
Solution Approach 1:
The patent applies periodic action through semi-persistent scheduling where resource allocations are granted for periodic intervals. The base station provides semi-static resource allocation that automatically repeats for multiple transmission opportunities without requiring continuous signaling. This resolves the contradiction by reducing signaling overhead through periodic resource grants while maintaining flexibility through the ability to update or cancel allocations between periods.
Data Source
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AI summary
Methods, systems, and devices for wireless communication are described. A base station may identify a semi-static resource allocation for a device (e.g., a user equipment (UE) ). The resource allocation may be associated with autonomous transmissions from the device in an unlicensed radio frequency spectrum band. The base station may generate and provide a message for transmission to the device. The message may convey an indication of the resource allocation. The device may receive the message and use the resource allocation to identify a transmission schedule for the autonomous transmissions.