User Equipment Power Allocation for URLLC Dual Connectivity
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Solution Overview
Problem
The existing dual connectivity technologies in communication networks, particularly in LTE and NR, face challenges in efficiently managing uplink transmission power for ultra-reliable and low latency communication (URLLC), leading to reduced signal quality and throughput due to non-ideal backhaul conditions and limited maximum transmission power.
Innovation Solution
The implementation of user equipment capable of dual connectivity, which includes a wireless interface circuit and a control circuit that determines the necessary communication network for URLLC transmission, utilizing reserved power from one network for URLLC transmission and optionally from another network where URLLC is not operational, to maximize power utilization and ensure reliable and low-latency communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transmits URLLC signals at maximum power in dual connectivity, then the transmission reliability is improved, but the transmission power may exceed the maximum power limit causing interference and network issues
Solution Approach 1:
The patent applies preliminary action by pre-allocating reserved power resources for URLLC transmissions in both MCG and SCG before actual transmission occurs. The control circuit determines in advance which cell groups have URLLC operations and reserves appropriate power levels, ensuring that when URLLC transmissions need to occur at high power, the necessary power resources are already allocated and ready, preventing both interference and reliability issues
Solution Approach 2:
The patent applies local quality by differentiating power allocation across different cell groups (MCG and SCG) based on their specific URLLC operation status. Instead of uniform power treatment, the control circuit identifies which cell groups actually perform URLLC operations and allocates reserved power specifically to those groups, allowing high-reliability transmissions where needed while avoiding excessive power in cell groups where URLLC is not operated
2Reliability
If minimum guaranteed transmission power is allocated for each cell group, then important uplink signals are protected from reduction, but the user throughput is deteriorated due to power limitations
Solution Approach 1:
The patent applies dynamics by making the power allocation adaptive rather than static. The control circuit dynamically determines which cell groups have URLLC operations and adjusts power allocation accordingly. When a cell group has URLLC operations, reserved power is allocated to ensure high reliability; when URLLC is not operated in a cell group, its reserved power can be reallocated or used differently, optimizing overall throughput while maintaining uplink signal quality where needed
3Power
If reserved power from another communication network is used for URLLC transmission, then the uplink transmission power is maximized, but the power management complexity increases
Solution Approach 1:
The patent applies universality by making the reserved power resources serve multiple functions. The control circuit determines that reserved power from cell groups where URLLC is not operated can be utilized for URLLC transmissions in other cell groups. This multi-functional use of reserved power maximizes the available transmission power for URLLC while managing complexity through a unified control approach that handles all cell groups systematically
Data Source
AI summary
In user equipment, a wireless interface circuit simultaneously communicates with two communication networks. A control circuit decides to use a first reserved power of one communication network where URLLC transmission is necessary, and a second reserved power of the other communication network in which the URLLC is not operated, for the URLLC transmission as to the one communication network. The wireless interface circuit transmits URLLC signals over the one communication network, using the first reserved power and the second reserved power.