UE Uplink Transmission State Management
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Solution Overview
Problem
In LTE-A systems with non-ideal backhaul between base stations, UE capabilities are not fully utilized due to independent scheduling of multiple carriers, leading to inefficiencies and resource waste.
Innovation Solution
The UE operates in two uplink transmission states: one where it transmits on all network side devices and another where it transmits on a part of them, with network side devices determining the state based on auxiliary scheduling information to optimize power usage and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UE transmits uplink data on all network side devices simultaneously, then the utilization of UE capability is improved, but the power consumption and resource allocation complexity increase
Solution Approach 1:
The patent implements dynamic adjustment of uplink transmission states, allowing the UE to switch between first uplink transmission state (transmitting on all network side devices) and second uplink transmission state (transmitting on part of network side devices) based on real-time scheduling information and power conditions, thereby optimizing both capability utilization and resource allocation complexity
Solution Approach 2:
The patent changes the transmission state parameter from fixed to variable, where the UE determines its transmission state based on power headroom, scheduling information from different network side devices, and current channel conditions, allowing flexible adaptation between full-capability mode and power-constrained mode
2Productivity
If UE transmits uplink data on all network side devices, then the data transmission efficiency is improved, but the power overload risk increases
Solution Approach 1:
The patent implements feedback mechanisms where the UE monitors its power headroom and transmits auxiliary scheduling information to network side devices, allowing real-time adjustment of transmission parameters to prevent power overload while maintaining high data transmission efficiency when conditions permit
Solution Approach 2:
The transmission state dynamically adjusts between aggressive mode (first state) for high efficiency and conservative mode (second state) for power management, with transitions triggered by power headroom thresholds and scheduling conditions from multiple network side devices
3Adaptability or versatility
If independent scheduling is performed on multiple carriers by each base station, then the scheduling flexibility is improved, but the resource allocation efficiency deteriorates
Solution Approach 1:
The patent merges scheduling information from multiple independently scheduling network side devices into a unified decision-making process at the UE, where the UE combines scheduling requests, acknowledgments, and power headroom information from all network side devices to determine the optimal transmission state, thereby improving resource allocation efficiency while preserving individual base station scheduling flexibility
Data Source
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AI summary
This application provides a data transmission method and user equipment. The method includes: sending, by user equipment UE, auxiliary scheduling information to a first part of or all of network side devices, so that the first part of or all of the network side devices determine an uplink transmission state of the UE according to the auxiliary scheduling information, and perform scheduling on the UE according to the uplink transmission state of the UE, where the uplink transmission state is a first uplink transmission state in which uplink data can be simultaneously transmitted on an uplink carrier corresponding to all of the network side devices, or is a second uplink transmission state in which uplink data can be simultaneously transmitted on an uplink carrier corresponding to a second part of the network side devices; and transmitting, by the UE, data according to scheduling information of the second part of or all of the network side devices.