Uplink Data Transmission via Unlicensed Band Priority Control
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Solution Overview
Problem
The increasing number of user equipment (UEs) in a prescribed resource region and the growing amount of data and control information that base stations (BS) need to transmit pose a challenge, as the available radio resources are limited, necessitating an efficient method for transmitting uplink and downlink data and control information.
Innovation Solution
The solution involves using carrier aggregation and licensed assisted access (LAA) to leverage unlicensed bands, allowing for simultaneous transmission of signals using different systems while maintaining compatibility with LTE/LTE-A systems, thereby optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation and licensed assisted access are used to leverage unlicensed bands, then the overall throughput of the radio communication system is enhanced, but the device complexity increases
Solution Approach 1:
The patent segments the radio frequency spectrum into licensed and unlicensed bands, allowing independent management and transmission on each band. This segmentation enables the system to aggregate multiple carriers across different bands, thereby enhancing throughput while maintaining manageable complexity through modular resource allocation
Solution Approach 2:
The patent implements multi-functionality by enabling the radio communication device to operate simultaneously on both licensed and unlicensed bands. The device can perform LTE transmissions on licensed bands while also conducting WLAN or other system transmissions on unlicensed bands, allowing a single device to serve multiple communication functions and protocols
2Reliability
If multiple data streams are transmitted simultaneously for broadcast, multicast, and unicast services, then the service availability increases, but the loss of energy increases
Solution Approach 1:
The patent implements dynamic resource allocation where the device can adaptively adjust transmission parameters based on service requirements. Different modulation and coding schemes are dynamically selected for broadcast, multicast, and unicast services, allowing the system to optimize power consumption while maintaining service availability by matching transmission characteristics to service priorities
Solution Approach 2:
The patent applies local quality by assigning different transmission characteristics to different service types. Broadcast services may use more robust but power-intensive modes for wide coverage, while unicast services can use more efficient modes for targeted transmission. This localized optimization of transmission quality reduces overall energy loss while maintaining service availability
Data Source
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Figure 3
Figure 4(a)~4(b)
AI summary
A user equipment (UE) may be configured with multiple logical channels (LoCHs). The multiple LoCHs may include at least one LoCH (U-LoCH) allowed to be transmitted via a unlicensed band. If the UE receives a uplink grant for a licensed band, the UE disables a priority bit rate of the U-LoCH for the uplink grant when applying a logical channel prioritization procedure.