Ethernet Switch Synchronization for Distributed Antenna Systems
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Solution Overview
Problem
Distributed antenna systems face synchronization challenges due to delays in Ethernet packet transmission through Ethernet switches, which can be affected by network traffic and CPU load, leading to performance issues in signal transmission.
Innovation Solution
Implementing techniques such as traffic prioritization, port selection, and data encoding to synchronize signal transmissions among antenna apparatuses connected through an Ethernet switch, allowing for coordinated and synchronized wireless signal transmission without the need for sophisticated protocols or expensive equipment, and using Ethernet backhaul for improved network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If Ethernet packet transmission is used to connect antenna apparatuses to the central processing facility, then cost savings and ease of operation are improved, but synchronization precision deteriorates due to delays affected by network traffic and CPU load
Solution Approach 1:
The patent applies preliminary action by pre-synchronizing the antenna apparatuses using IEEE 1588v2 Precision Time Protocol before signal transmission. This advance synchronization compensates for potential delays in Ethernet packet transmission, ensuring that even though packets may experience variable delays due to network traffic and CPU load, the antennas are already synchronized and can maintain precise timing for MIMO operations.
2Device complexity
If Ethernet switches are used in the network environment, then device complexity and cost are reduced, but synchronization reliability deteriorates due to variable transmission delays
Solution Approach 1:
The patent implements feedback mechanisms through IEEE 1588v2 Precision Time Protocol which continuously monitors and adjusts timing synchronization between the central processing facility and antenna apparatuses. This feedback loop compensates for variable delays introduced by Ethernet switches, maintaining reliable synchronization despite the simplified network infrastructure.
3Ease of manufacture
If standard Ethernet protocols are used without sophisticated synchronization protocols, then cost and device complexity are reduced, but signal transmission reliability deteriorates
Solution Approach 1:
The patent changes the timing parameters dynamically by using IEEE 1588v2 Precision Time Protocol to continuously adjust synchronization offsets. This allows the system to maintain reliable signal transmission for MIMO operations while using standard, cost-effective Ethernet infrastructure, avoiding the need for specialized expensive equipment.
Data Source
AI summary
According to an example, signal transmissions by a first antenna apparatus and a second antenna apparatus connected to a central processing apparatus through an Ethernet switch may be synchronized with respect to each other. An Ethernet packet containing first data and second data may be generated, in which the first antenna apparatus is to wirelessly transmit the first data and the second antenna apparatus is to wirelessly transmit the second data. In addition, the Ethernet packet may be communicated to the Ethernet switch, in which the Ethernet switch includes a first port that is in communication with the first antenna apparatus and a second port that is in communication with the second antenna apparatus, and the Ethernet switch is to communicate the Ethernet packet through the first port and a copy of the Ethernet packet through the second port substantially simultaneously with respect to each other.