5G Beam Indication for Downlink Reception Accuracy
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Solution Overview
Problem
In 5G systems, poor downlink receiving performance occurs when terminal devices mismatch transmitting and receiving beams, leading to suboptimal signal reception.
Innovation Solution
A method where a network device sends indication information to a terminal device specifying the appropriate beam for downlink transmission channels, including configuration information about transmitting and receiving beams, and resource mapping, allowing the terminal device to select the correct receiving beam for improved reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple beams are used to cover different directions and regions, then the coverage area is improved, but the complexity of beam management increases
Solution Approach 1:
The patent divides the beam management process into separate functions: the network device segments beam configuration and indication tasks, while the terminal device segments beam selection and reception tasks. This segmentation allows multiple beams to be managed independently without increasing overall system complexity.
Solution Approach 2:
The network device performs preliminary beam configuration by pre-defining multiple beams with different parameters before actual data transmission. This preliminary action enables the terminal device to already have beam selection capabilities ready, reducing real-time management complexity while maintaining broad coverage.
2Reliability
If beam indication information is transmitted to the terminal device, then downlink receiving performance is improved, but the amount of signaling overhead increases
Solution Approach 1:
The patent makes the indication information multi-functional by embedding it within existing downlink control channel structures. The same control channel that carries scheduling information also carries beam indication information, allowing one signaling element to serve multiple purposes without increasing overall overhead.
Solution Approach 2:
The patent uses copying by referencing previously configured beam parameters rather than transmitting complete beam descriptions each time. The terminal device stores beam configuration information and receives only selective indications, reducing signaling overhead while maintaining the ability to identify specific beams for downlink reception.
Data Source
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AI summary
Embodiments of the present application provide an information transmission method, a network device, and a terminal device, which can improve downlink receiving performance. A network device sends indication information to a terminal device, where the indication information indicates a beam corresponding to a downlink transmission channel determined by the network device from multiple pieces of configuration information, the beam corresponding to the downlink transmission channel is used to transmit the downlink transmission channel, and each piece of the multiple pieces of configuration information includes at least one of: information of at least one transmitting beam, information of a receiving beam corresponding to the at least one transmitting beam, and resource mapping information, where the resource mapping information indicates a resource available or unavailable for downlink transmission of the at least one transmitting beam; the network device transmits the downlink transmission channel through the beam corresponding to the downlink transmission channel.