Paging Message Transmission via PDCCH for Power Reduction
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Solution Overview
Problem
In wireless communication systems, terminal devices experience increased power consumption when receiving paging messages as they need to demodulate both the physical downlink control channel (PDCCH) and physical downlink shared channel (PDSCH), especially when short messages are carried on the PDSCH.
Innovation Solution
The method involves sending the paging message solely on the PDCCH, allowing the terminal device to receive only the PDCCH, thereby reducing power consumption by eliminating the need to receive the PDSCH.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the paging message is carried on the PDSCH, then the terminal device can receive the paging message, but the power consumption of the terminal device increases due to the need to demodulate both PDCCH and PDSCH
Solution Approach 1:
The patent merges the paging message with the PDCCH by embedding the paging message in the DCI format. This combining approach allows the terminal device to receive the paging message while only demodulating the PDCCH, eliminating the need to separately demodulate the PDSCH and thereby reducing power consumption while maintaining reliable paging message reception
2Use of energy by moving object
If the paging message is carried on the PDCCH, then the power consumption of the terminal device is reduced, but the capacity of the PDCCH to carry control information is limited
Solution Approach 1:
The patent makes the DCI format multi-functional by enabling it to carry both control information and the paging message. This universal approach allows the PDCCH to serve dual purposes: transmitting control information and delivering the paging message, thereby overcoming the limited capacity constraint while maintaining low power consumption benefits
Data Source
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AI summary
This application provides a paging message transmission method and apparatus, where the method includes: receiving, by a terminal device, a physical downlink control channel PDCCH from a network device, where one or more types of first indication information, second indication information, a short message, and scheduling information of a paging message are carried on the PDCCH, the first indication information is used to indicate that the PDCCH carries the short message and/or the scheduling information, and the second indication information is used to indicate whether the scheduling information of the paging message is valid and/or whether the terminal device needs to receive a physical downlink shared channel PDSCH; and obtaining, by the terminal device based on the PDCCH, one or more types of the information carried on the PDCCH.