Small Cell Pseudo-On State Transition for Wireless Networks
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transitioning small cells from a dormant state to an active state to meet increasing bit rate demands, particularly in high-density user areas, due to lengthy service switching times which hinder system capacity and quality of service.
Innovation Solution
Implementing a method that allows small cells to transition from a dormant state to an active state through an intermediate 'pseudo-on' state, utilizing signaling information and channel state measurements to quickly prepare and activate the cell, enabling it to serve user equipment within 40 ms, thereby reducing transition time and improving system capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If small cells transition directly from dormant state to active state, then system capacity and quality of service are improved, but service switching time becomes excessively long (hundreds of milliseconds)
Solution Approach 1:
The patent applies preliminary action by introducing a pseudo-on state that performs preparatory operations before full activation. The small cell executes channel tracking, reference signal transmission, and measurement collection in advance while in pseudo-on state, so that when transitioning to active state, these operations are already complete or near-complete, dramatically reducing the service switching time from hundreds of milliseconds to less than 40 milliseconds.
Solution Approach 2:
The transition process is segmented into distinct states: dormant state, pseudo-on state, and active state. Each state performs specific functions - dormant state for power saving, pseudo-on state for preparation and channel tracking, and active state for full service. This segmentation allows the system to optimize each phase independently, reducing overall transition time while maintaining energy efficiency.
2Use of energy by moving object
If small cells use lower transmit power to serve small areas, then energy consumption is reduced, but the ability to meet high bit rate demands in high-density areas is limited
Solution Approach 1:
The patent implements dynamic power management by allowing small cells to transition between dormant state (low/no power), pseudo-on state (partial power for reference signals), and active state (full power for data transmission). This dynamic adjustment enables the system to consume minimal energy during low-demand periods while rapidly scaling up capacity when high bit rate demands arise in high-density user areas.
Solution Approach 2:
The system changes operational parameters (transmit power level, signal transmission mode) based on demand conditions. In pseudo-on state, the small cell transmits reference signals at reduced power for channel estimation, then transitions to full power transmission when activated, allowing efficient energy use during preparation and high power output only when needed for serving users.
3Use of energy by moving object
If small cells remain in dormant state to save energy, then energy consumption is reduced, but the transition to active state traditionally takes too long to meet quality of service requirements
Solution Approach 1:
The pseudo-on state performs preliminary channel tracking and reference signal transmission while consuming minimal energy, so that when the small cell needs to activate, the channel state is already known and the transition to serving users can occur rapidly within 40 milliseconds, meeting quality of service requirements while maintaining energy efficiency during idle periods.
Data Source
AI summary
At least one example embodiment discloses a method of coordinating a change from a first operating state to a second operating state of a selected cell in a system. The method includes changing to an intermediate state from the first operating state based on first signaling information exchanged between a serving cell of a user equipment (UE) and the selected cell in the first operating state and at least one signal received by the selected cell in the first operating state from the UE, the first operating state being a dormant state and operating in the intermediate state based on second signaling information between the serving cell and the selected cell, third signaling information between the serving cell and the UE and transmission information between the UE and the selected cell, the intermediate state being between the first operating state and the second operating state, the second operating state being an on state where the selected cell serves the UE.