UE Power Saving via PDCCH Indication
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Solution Overview
Problem
Wireless communication systems face challenges in efficiently managing power saving states for user equipment (UEs) due to the lack of effective methods for indicating subsequent physical downlink control channel (PDCCH) transmissions, leading to unnecessary power consumption and potential missed data.
Innovation Solution
A network access device indicates information about subsequent PDCCH transmissions to UEs, allowing them to configure power saving states based on the received information, activating or deactivating these states to conserve power when no transmissions are scheduled or when duplicate data is expected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continuously monitors PDCCH transmissions to ensure no data is missed, then the reliability of data reception is improved, but the power consumption increases
Solution Approach 1:
The network access device performs preliminary action by indicating information about subsequent PDCCH transmissions in advance (in the current PDCCH). This allows the UE to configure its power saving state beforehand, knowing whether it needs to wake up for future transmissions, thus avoiding unnecessary power consumption while ensuring data is not missed
Solution Approach 2:
The UE dynamically adjusts its power saving state based on the indicated information about subsequent PDCCH transmissions. The receiver transitions between active and low-power states dynamically, rather than continuously remaining active, resolving the contradiction between continuous monitoring and power saving
2Use of energy by moving object
If the UE activates power saving state to reduce power consumption, then the battery life is prolonged, but the risk of missing important data increases
Solution Approach 1:
The network access device provides feedback information about subsequent PDCCH transmissions to the UE. This feedback mechanism allows the UE to make informed decisions about activating or deactivating power saving state, ensuring that important data is not missed while still achieving power conservation when appropriate
3Reliability
If the UE monitors all PDCCH transmissions without power saving, then no data is missed, but the battery life decreases
Solution Approach 1:
By receiving advance indication information about subsequent PDCCH transmissions, the UE can preliminarily determine whether to activate power saving state, avoiding continuous monitoring and extending battery life while ensuring important data is not missed
Solution Approach 2:
The UE uses the indicated information to autonomously configure its own power saving state without continuous network control, making intelligent decisions about when to wake up and when to save power, thus extending battery life while maintaining data reception completeness
Data Source
AI summary
Techniques are described for wireless communication. A method for wireless communication at a user equipment (UE) includes receiving, by the UE, a first transmission on a beam over a radio frequency spectrum during a first time interval. The first transmission includes an indication of a subsequent physical downlink control channel (PDCCH) transmission on the beam. The indication includes information about a PDCCH in a second time interval subsequent to the first time interval. The method also includes configuring a power saving state of the UE based at least in part on the indication. A method for wireless communication at a network access device includes transmitting the first transmission to at least one UE, and transmitting the PDCCH during the second time interval.