Base Station Discovery Reference Signal Configuration for Stop State Detection

Solution Overview

Problem

When a base station device is switched to a stop state, the transmission of synchronization and reference signals is halted, making it difficult for terminal devices to find the base station, leading to prolonged preparation times and reduced transmission efficiency.

Innovation Solution

Implementing a communication system that allows terminal devices to detect the base station's state through specific configurations of discovery reference signals (DRS) and cell-specific reference signals, enabling efficient connection even when the base station is in a stop state by using cell-specific and DRS configurations that differentiate between start-up and stop states.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If the base station device is switched to the stop state to reduce power consumption and inter-cell interference, then power consumption and interference are reduced, but transmission efficiency deteriorates due to prolonged preparation time for connection

Engineering Contradiction:

Improvepower consumptionVSAvoidtransmission efficiency

Core Design Contradiction:

Loss of energyVSProductivity

Solution Approach 1:

The base station device transmits discovery reference signals (DRS) in advance while in the stop state, enabling terminal devices to detect and prepare for connection before the base station actually becomes active. This preliminary signaling allows terminals to queue connection requests, so when the base station transitions from stop to active state, connections can be established immediately without prolonged preparation delays, thus maintaining high transmission efficiency while still achieving power savings during the stop state

Inventive Principle:

Principle #10Preliminary action

2Object-generated harmful factors

If the base station device is switched to the stop state to reduce inter-cell interference, then interference is reduced, but transmission efficiency deteriorates due to prolonged preparation time for connection

Engineering Contradiction:

Improveinter-cell interferenceVSAvoidtransmission efficiency

Core Design Contradiction:

Object-generated harmful factorsVSProductivity

Solution Approach 1:

The base station device transmits discovery reference signals (DRS) in advance while in the stop state, enabling terminal devices to detect and prepare for connection before the base station actually becomes active. This preliminary signaling allows terminals to queue connection requests, so when the base station transitions from stop to active state, connections can be established immediately without prolonged preparation delays, thus maintaining high transmission efficiency while still achieving interference reduction during the stop state

Inventive Principle:

Principle #10Preliminary action

3Loss of energy

If the base station device is switched to the stop state, then power consumption and interference are reduced, but terminal devices have difficulty finding the base station due to halted synchronization and reference signal transmission

Engineering Contradiction:

Improvepower consumptionVSAvoidbase station detection difficulty

Core Design Contradiction:

Loss of energyVSDifficulty of detecting and measuring

Solution Approach 1:

The base station device transmits discovery reference signals (DRS) in advance while in the stop state, enabling terminal devices to detect and prepare for connection before the base station actually becomes active. This preliminary signaling allows terminals to queue connection requests, so when the base station transitions from stop to active state, connections can be established immediately without prolonged preparation delays, thus maintaining high transmission efficiency while still achieving power savings during the stop state

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention extracts the essential detection function from the full set of signals transmitted in active state. Instead of transmitting all synchronization and reference signals, the base station transmits only the minimal necessary discovery reference signals during the stop state. This extracted minimal signaling is sufficient for terminal detection while consuming significantly less power, resolving the contradiction between detection capability and power consumption

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP3122116B1Terminal device and base station device

Publication Date: 2021.05.05 SHARP KK

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AI summary

A terminal device communicating with a base station device includes a reception unit which performs first measurement based on a first RS and performs second measurement based on a second RS; and a higher layer processing unit which reports a first measurement result obtained by the first measurement and a second measurement result obtained by the second measurement to the base station device. The first measurement is performed in a first state. The first measurement or the second measurement is performed in a second state.