Terminal Bandwidth Switching for Power and Performance Balance
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Solution Overview
Problem
In LTE and 5G communication systems, terminals face high power consumption due to blind detection of Physical Downlink Control Channels (PDCCH) across the entire system bandwidth, which restricts system performance and prevents the transmission of pre-scheduled services like VoLTE when operating on narrower bandwidths.
Innovation Solution
A method where a base station sends a switch message to a terminal to switch to a designated narrow bandwidth for reduced power consumption, and schedules the terminal to switch to the system bandwidth or the bandwidth occupied by a pre-scheduled service for service transmission, using downlink control information in a terminal-specific search space with control-channel element aggregation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal receives PDCCH on the whole system bandwidth, then the system performance is improved, but the power consumption of the terminal increases
Solution Approach 1:
The terminal dynamically switches between narrow bandwidth receiving mode and normal bandwidth mode based on service requirements. The base station configures multiple bandwidths and controls the terminal to switch between them, making the bandwidth adaptive to different service scenarios rather than fixed at the maximum system bandwidth.
Solution Approach 2:
The terminal changes the bandwidth parameter of the received signal based on service types. For power-saving scenarios, the terminal receives signals on a narrow bandwidth (e.g., 6 PRBs), while for services requiring full system bandwidth, the terminal switches to normal bandwidth reception mode.
2Use of energy by moving object
If the terminal works on a narrower bandwidth, then the power consumption is reduced, but the system performance deteriorates
Solution Approach 1:
The system dynamically adjusts the operating bandwidth based on service requirements. The base station configures multiple bandwidths and controls the terminal to switch between narrow bandwidth mode for power saving and normal bandwidth mode for high-performance services, making the system adaptable rather than static.
Solution Approach 2:
The terminal periodically switches between narrow bandwidth and normal bandwidth modes according to service schedules. For pre-scheduled services, the terminal switches to normal bandwidth at specific time points to receive service data, then returns to narrow bandwidth mode for power saving.
3Use of energy by moving object
If the terminal operates on a narrower bandwidth, then the power consumption is saved, but the transmission of pre-scheduled services cannot be accomplished
Solution Approach 1:
The base station performs preliminary configuration by setting up multiple bandwidths and pre-scheduling service information before actual service transmission. The terminal receives and stores this configuration in advance, enabling it to switch to the appropriate bandwidth mode when pre-scheduled services need to be received.
Solution Approach 2:
The terminal dynamically switches bandwidth modes based on service requirements. When pre-scheduled services are detected, the terminal switches from narrow bandwidth mode to normal bandwidth mode to receive the service data, ensuring reliable transmission while maintaining power efficiency during non-service periods.
Data Source
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AI summary
Embodiments of the invention disclose a service transmission method, a base station and a terminal. The method includes: a base station sends a switch message of a narrow bandwidth receiving mode to a terminal, indicating the terminal to switch to a designated narrow bandwidth to receive information, wherein a width of the narrow bandwidth is smaller than a width of a system bandwidth; and when a pre-scheduled service needs to be transmitted, the base station schedules the terminal to switch to the system bandwidth or the bandwidth occupied by the pre-scheduled service to receive the pre-scheduled service. By adopting the embodiments of the invention, the terminal can be flexibly switched between the narrow bandwidth and the system bandwidth, the balance between the power consumption of the terminal and the system performance can be achieved, and the transmission of the pre-scheduled service can be successfully completed.