Control Base Station Synchronization for Dynamic Traffic Nodes
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Solution Overview
Problem
The existing cellular network synchronization methods are inadequate for the separation architecture, particularly in providing fast and efficient synchronization between base stations that dynamically sleep and wake up, and ensuring precise synchronization for mobile user equipment, especially under high traffic demands and diverse device types.
Innovation Solution
A synchronization apparatus and method that utilizes a GNSS synchronization unit in control base stations to adjust clocks and transmit synchronization information via wired connections to traffic base stations, enabling fast and precise synchronization between control and traffic base stations, and subsequently to mobile user equipment, without requiring GNSS receivers at each base station or user equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If base stations dynamically sleep and wake up to improve energy efficiency, then energy consumption is reduced, but synchronization between base stations becomes difficult to maintain
Solution Approach 1:
The control base station pre-calculates and embeds the preset time into the wake-up message before the traffic base station actually wakes up. This preliminary action ensures that when the traffic base station wakes up, it can immediately synchronize its clock without needing to wait for subsequent synchronization messages, thus maintaining synchronization reliability while allowing dynamic sleep-wake operations
Solution Approach 2:
The control base station acts as an intermediary between the GNSS time source and the traffic base stations. It receives GNSS time information, processes it into wake-up messages with preset times, and transmits these to traffic base stations. This intermediary role allows traffic base stations to remain in sleep mode without direct GNSS connection while still maintaining synchronization through the control base station's coordinated wake-up signaling
2Measurement precision
If GNSS receivers are deployed at each base station and user equipment to improve synchronization precision, then synchronization precision is improved, but device complexity and cost increase
Solution Approach 1:
The control base station serves multiple functions: it acts as a GNSS receiver, a time server, a synchronization coordinator, and a wake-up signal transmitter. By consolidating these functions into a single control base station rather than distributing GNSS receivers to all base stations and user equipment, the system achieves sub-microsecond synchronization precision while reducing overall device complexity and cost
Solution Approach 2:
The control base station autonomously performs time synchronization with GNSS and automatically generates and transmits wake-up messages with embedded preset times to traffic base stations. This self-service mechanism eliminates the need for complex synchronization protocols and direct GNSS connections at each node, simplifying the overall system while maintaining high precision
3Productivity
If traffic base stations are dynamically activated to meet high traffic demands, then network capacity is improved, but synchronization complexity increases
Solution Approach 1:
The system dynamically activates traffic base stations based on real-time traffic demands. The control base station monitors traffic conditions and sends wake-up messages with preset times to activate specific traffic base stations as needed. This dynamic approach allows the network to scale capacity flexibly while the centralized wake-up message mechanism keeps synchronization complexity manageable
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution achieves low complexity and cost synchronization, ensuring sub-microsecond precision and flexible network synchronization, even when base stations are in sleep or wake-up states, effectively supporting high-traffic and real-time mobile Internet applications.
Implementation Method 1
a GNSS synchronization unit configured to receive a GNSS signal through a GNSS antenna to obtain time information
Data Source
AI summary
A synchronization apparatus in a control base station is disclosed. A GNSS synchronization unit receives a GNSS signal through a GNSS antenna to obtain time information. A clock generation unit adjusts a clock of the control base station based on the time information provided by the GNSS synchronization unit. A traffic base station synchronization unit transmits and receives information with a traffic base station through a wired connection. A user data sample generation unit generates data required by a mobile user including network time information, and transmits the data to the mobile user equipment through a control base station antenna.