Multi-RF User Equipment Asymmetric Bandwidth Transmission
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting data in multi-radio frequency (RF) systems, particularly in allocating asymmetric bandwidths and managing interference between multiple physical channels, which affects throughput and compatibility with legacy systems.
Innovation Solution
A method and apparatus for transmitting data in a multi-RF system using a user equipment (UE) that simultaneously transmits data through multiple physical channels, employing a combination of SC-FDMA and OFDMA signals, with the ability to generate frequency-domain symbols and perform inverse fast Fourier transforms to optimize data transmission across different channels, and includes interference management to mitigate inter-cell interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spectrum aggregation technique is used to allocate asymmetric bandwidth between uplink and downlink, then bandwidth utilization is improved, but device complexity increases
Solution Approach 1:
The patent divides the wide bandwidth into multiple separate RF components (e.g., first RF component 710 and second RF component 720), each operating independently with its own baseband processor and RF processor. This segmentation allows asymmetric bandwidth allocation between uplink and downlink while keeping each individual RF component's complexity manageable, as each component handles only a portion of the total bandwidth.
2Productivity
If multiple RFs are used to support increasing throughput, then data transmission capacity is improved, but system complexity increases
Solution Approach 1:
The patent combines multiple RF components (first RF component 710 and second RF component 720) to transmit data simultaneously through different frequency bands. The baseband processor 705 generates data for both RF components, and the RF processor 707 combines the transmitted signals. This merging approach increases data transmission capacity by utilizing multiple frequency bands while managing system complexity through a unified baseband processing architecture.
3Use of energy by moving object
If SC-FDMA is used for uplink transmission, then transmission power efficiency is improved, but peak-to-average power ratio is reduced
Solution Approach 1:
The patent employs SC-FDMA (Single Carrier Frequency Division Multiple Access) modulation for uplink transmissions from user equipment 120 to base station 110. SC-FDMA changes the signal parameters by using a single carrier waveform with frequency domain equalization, which significantly reduces the peak-to-average power ratio compared to conventional OFDMA. This parameter change improves transmission power efficiency, allowing user equipment with limited power resources to transmit data more efficiently over the air interface.
Data Source
AI summary
A method and an apparatus of receiving data, the method carried in a user equipment (UE) configured to communicate with a first cell and a second cell, are provided. The method includes: receiving a first downlink data through a first downlink channel from the first cell, receiving a second downlink data through a second downlink channel from the second cell, and transmitting a data on a third channel, wherein the data transmitted on the third channel is related to a HARQ operation, and wherein the third channel is used to transmit the data related to the HARQ operation with respect to both the first data and the second data which have been received from the first and second cells, respectively.