Sub-Band Information Selection for 8-Antenna Precoding
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Solution Overview
Problem
The challenge in communication technology is determining sub-band information for frequency selective precoding when increasing the number of uplink antennas from 4 to 8, which is necessary for enhancing uplink transmission rates in MIMO systems.
Innovation Solution
A method and apparatus for determining sub-band information through multiple determination manners, triggered by downlink signaling, allowing terminals to select the appropriate method for frequency selective precoding, including indication, predefined, and expected information-based approaches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of uplink antennas is increased from 4 to 8 to support higher uplink transmission rates, then the uplink transmission rate is improved, but the complexity of determining sub-band information for frequency selective precoding increases
Solution Approach 1:
The patent implements dynamic selection of sub-band information determination methods based on system conditions. The terminal and network device can switch between different determination methods (first method using uplink channel state information, second method using downlink channel state information) according to the number of antennas, channel conditions, and precoding requirements, making the system adaptable rather than static
Solution Approach 2:
The patent changes the parameters used for sub-band information determination based on the operating scenario. When 8 uplink antennas are configured, the system can switch to using downlink channel state information (different parameter source) for sub-band determination, rather than always relying on uplink channel state information, thus adapting to the increased complexity
2Reliability
If frequency selective precoding is implemented with 8 uplink antennas to improve transmission performance, then the beamforming gain is improved, but the signaling overhead and determination method complexity increase
Solution Approach 1:
The patent makes the downlink signaling serve multiple functions simultaneously. The same downlink signaling that carries channel state information for precoding also provides the basis for sub-band information determination when the first method is selected. This multi-functionality reduces the need for separate dedicated signaling for sub-band determination, thereby reducing overall signaling overhead
Data Source
AI summary
A method for determining sub-band information is performed by a terminal, and the terminal supports at least two manners for determining sub-band information. The method includes: receiving a first downlink signaling; and selecting a target manner for determining sub-band information from the at least two manners for determining sub-band information, in response to the first downlink signaling; wherein the sub-band information is information required by the terminal to perform frequency selective precoding.