Beam-RNTI Mapping for Low-Power Broadcast Reception
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Solution Overview
Problem
In conventional multimedia broadcast multicast services, terminal devices waste resources and experience increased power consumption due to blindly listening to beams that are not selected during training, leading to inefficient information transmission.
Innovation Solution
A network device configures a mapping period for a radio network temporary identifier (RNTI) and corresponding listening occasions, ensuring that transmission resources are aligned with the selected beam, thereby improving transmission success rates and reducing resource waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal devices perform listening on all listening occasions using beam training manner, then the terminal device can obtain information sent by the network device, but the terminal device cannot obtain information when the network device does not transmit using the selected beam, resulting in wasted power and resources
Solution Approach 1:
The network device performs preliminary action by determining the mapping relationship between listening occasions and beams in advance, and configuring this mapping to terminal devices before actual information transmission. This allows terminal devices to know which beam to use for listening at each listening occasion, avoiding blind listening on all beams and reducing power consumption while ensuring reliable information reception.
2Productivity
If the network device configures listening occasions for terminal devices, then the terminal devices can decode downlink control information, but the network device may not transmit information using the configured beam, causing resource waste
Solution Approach 1:
The network device uses feedback from beam training processes to determine which beams are actually selected by terminal devices. Based on this feedback, the network device configures the mapping between listening occasions and beams, ensuring that information is transmitted only on beams that terminal devices have actually selected, thereby avoiding air interface resource waste while maintaining high transmission efficiency.
Data Source
AI summary
A method to resolve a problem of resource waste caused by a communication device listening to, on all listening occasions, information scrambled by using a first radio network temporary identifier RNTI. A network device determines a mapping period of a first RNTI, where in the mapping period, a beam and a listening occasion form a mapping relationship, so that the network device sends, to a terminal device on a target listening occasion by using a target beam, information scrambled by using the first RNTI. The terminal device receives, on the target listening occasion by using the target beam, the information scrambled by using the first RNTI.