Uplink Power Allocation Across Cell Groups in 5G Multiple Connectivity
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Solution Overview
Problem
In multiple-connectivity wireless communication systems, improper power control leads to inefficient use of transmission power, resulting in reduced uplink performance and communication quality issues due to unnecessary power consumption or lack of power on certain carriers.
Innovation Solution
A method and apparatus for dynamic power distribution among cell groups based on transmission intervals, prioritizing physical uplink control channel (PUCCH) transmission and considering channel quality and communication service type to optimize power allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If power is allocated uniformly across all cell groups, then power distribution is simple, but uplink performance deteriorates due to inefficient power usage on certain carriers
Solution Approach 1:
The patent implements differentiated power allocation where each cell group receives power based on its specific characteristics (PUCCH transmission requirements, channel quality, service type) rather than uniform distribution. The base station calculates and signals specific power values to the terminal for each cell group, optimizing uplink performance for control channels and data channels separately.
2Reliability
If power is increased for all cell groups to ensure sufficient transmission power, then communication quality improves, but power wastage increases on carriers with good channel conditions
Solution Approach 1:
The patent implements dynamic power allocation where the base station continuously monitors channel quality indicators (CQI), PUCCH transmission requirements, and service types for each cell group, then adjusts power allocation accordingly. Power values are re-calculated and re-s signaled to the terminal based on current channel conditions, ensuring power is increased only when and where needed.
3Use of energy by moving object
If power allocation is optimized for each cell group based on transmission requirements, then power efficiency improves, but system complexity increases due to multiple base stations coordinating power distribution
Solution Approach 1:
The patent divides the multiple-connectivity system into separate cell groups (MCG and SCG), each with independent power allocation. The base station calculates power requirements for each cell group separately based on their specific transmission requirements (PUCCH, PUSCH, service types), then signals power values for each group independently, simplifying the coordination complexity.
4Reliability
If physical uplink control channel (PUCCH) transmission is prioritized over other transmissions, then control channel reliability improves, but power available for data transmission decreases
Solution Approach 1:
The terminal measures channel quality for each cell group and feeds back CQI information to the base station. The base station uses this feedback to determine appropriate power levels for PUCCH and PUSCH transmissions in each cell group, balancing control channel reliability with data transmission power availability based on actual channel conditions.
Data Source
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AI summary
The disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system, such as Long Term Evolution (LTE). A power distribution apparatus in a wireless communication system is provided. The apparatus includes at least one transceiver, and at least one processor, wherein the at least one processor is configured to identify a cell group set for a particular transmission interval among multiple cell groups connected to a terminal, perform a distribution of a power for the terminal to each of cell groups in the cell group set, and transmit power allocation information according to a result of the distribution to the terminal, wherein the cell group set includes a cell group including one or more cells in which uplink transmission is to be performed at the particular transmission interval.