OFDM Uplink Control Beam Selection for Gap-Free Transmission
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Solution Overview
Problem
The configuration of Orthogonal Frequency Division Multiplexing (OFDM) symbols for uplink controls in wireless communication systems leads to complicated processing due to gaps and inefficiencies in uplink data and control transmission, particularly when multiple receiving ends with different beam directions are involved.
Innovation Solution
The method involves configuring or specifying continuous OFDM symbols for uplink control and data transmission, and determining or informing the beam direction for uplink control, ensuring seamless integration and reducing processing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple uplink controls are included in one transmission unit with each occupying one OFDM symbol, then time division multiplexing of uplink controls is achieved, but processing complexity increases due to gaps and inefficiencies in uplink data and control transmission
Solution Approach 1:
The patent combines uplink control and uplink data transmission into a continuous process by allowing uplink control to span multiple OFDM symbols and eliminating gaps between control and data transmission. This merging approach maintains time division multiplexing capability while reducing processing complexity by avoiding neutral positions and continuous transmission interruptions.
Solution Approach 2:
The patent ensures continuous transmission by eliminating gaps between uplink control and uplink data. The uplink control can occupy multiple continuous OFDM symbols, and the transmission flows continuously without neutral positions, maintaining useful action continuity and reducing processing complexity associated with starting and stopping transmissions.
2Ease of manufacture
If uplink control occupies one OFDM symbol, then short format uplink control is implemented, but transmission efficiency decreases due to gaps between control and data
Solution Approach 1:
The patent performs preliminary configuration by determining the number of OFDM symbols for uplink control before transmission begins. This allows the system to allocate adequate symbols for control information without creating gaps, ensuring both implementation simplicity and transmission efficiency by planning the transmission structure in advance.
Solution Approach 2:
The patent makes the uplink control transmission dynamic by allowing it to occupy a flexible number of OFDM symbols (one or more) based on actual needs. This dynamic allocation eliminates fixed-format limitations and gaps, maintaining ease of implementation while improving transmission efficiency through adaptive resource usage.
3Adaptability or versatility
If multiple receiving ends with different beam directions are involved, then beam direction diversity is achieved, but processing complexity increases due to coordination requirements
Solution Approach 1:
The patent implements a universal uplink control transmission mechanism that works across multiple beam directions without requiring separate handling for each direction. The base station receives uplink control from multiple receiving ends using different beam directions through a unified process, reducing coordination complexity while maintaining beam direction diversity and adaptability.
Data Source
AI summary
Provided are an uplink control receiving method, an uplink control sending method, a base station, a user equipment, and a storage medium. The method includes: specifying a beam direction used for sending an uplink control in an orthogonal frequency division multiplexing (OFDM) symbol in which the uplink control is located in a transmission unit, and receiving the uplink control according to the specified beam direction used by the uplink control; wherein the specifying the beam direction used for sending the uplink control in the OFDM symbol in which the uplink control is located in the transmission unit comprises: using by default all or at least one of beam directions used for transmitting uplink data in a previous transmission unit as the beam direction used for transmitting the uplink control, wherein the previous transmission unit refers to a transmission unit before the transmission unit.