Downlink Signal Reception With Dynamic Port-to-RE Mapping
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Solution Overview
Problem
Network devices dynamically adjusting their energy consumption and service requirements cause terminals to struggle with determining the appropriate receiving resources for downlink signals, as existing methods fail to account for changes in the number of active ports used by the network device.
Innovation Solution
Terminals determine a spatial element pattern activated by the network device through indication signaling, using bitmaps or index values to identify active ports and corresponding Resource Elements (REs) for receiving downlink signals, enabling dynamic adjustment of port usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the network device dynamically adjusts the number of ports used for transmitting the downlink signal based on transmission load and energy consumption requirements, then the flexibility and energy efficiency of the network device is improved, but the terminal cannot determine the corresponding receiving resource
Solution Approach 1:
The network device sends indication signaling to the terminal to provide feedback about the activated spatial element pattern and port configuration. This feedback mechanism allows the terminal to determine the correct receiving resources by receiving real-time information about which ports are active and how they are mapped to REs, resolving the information loss problem while maintaining dynamic port adjustment flexibility
Solution Approach 2:
Indication signaling acts as an intermediary between the network device and terminal. It carries information about the activated spatial element pattern, port mapping relationships, and RE allocation, enabling the terminal to infer receiving resources without direct configuration, thus maintaining flexibility while preventing information loss
2Use of energy by moving object
If the network device dynamically adjusts the number of ports based on transmission load, then the energy consumption is optimized, but the terminal lacks information to determine the active ports and their corresponding REs
Solution Approach 1:
The network device pre-configures multiple spatial element patterns and port mapping relationships before dynamic adjustment. When adjusting ports based on energy requirements, the terminal can quickly determine receiving resources by referencing these pre-established patterns and the indication signaling, ensuring reliability while enabling energy-efficient dynamic adjustment
Solution Approach 2:
The system changes parameters (spatial element pattern index, port activation status, RE mapping) through indication signaling to convey information about the current port configuration. This parameter-based communication ensures the terminal accurately determines receiving resources while the network device maintains flexibility in adjusting ports for energy optimization
Data Source
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AI summary
The present disclosure provides a signal receiving method and apparatus, and a signal sending method and apparatus. The signal receiving method comprises : receiving an indication signaling sent by a network device, the indication signaling being used for determining a first space unit model activated by the network device; determining first ports in an activated state under the first space unit model; on the basis of a mapping relationship between different ports and different resource elements (REs), determining a first RE corresponding to each of the first ports; and receiving on each of the first REs a downlink signal sent by the network device by means of the corresponding first port. The present disclosure supports the network device to dynamically adjust the number of ports in the activated state, such that the transmission of downlink signals is more flexible, thus achieving high availability.