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Coolpad Technology Team
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Coolpad Technology Team

Committed to advancing technology and supporting innovators. The Coolpad Technology Team regularly shares forward‑looking insights, product updates, and tech news. Tech experts are welcome to join; everyone is invited to follow us.

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Recent Articles

Latest from Coolpad Technology Team

32 recent articles
Coolpad Technology Team
Coolpad Technology Team
Aug 5, 2022 · Mobile Development

Understanding Variable Refresh Rate on Android Devices and How to Control It

This article explains what variable refresh rate is on Android, how the platform determines the final refresh rate when multiple apps request different rates, and provides detailed SDK and NDK methods—including DisplayManager listeners, Surface.setFrameRate, and AChoreographer callbacks—to query and set refresh rates, as well as the underlying SurfaceFlinger vote and policy mechanisms that enforce these settings.

NDKSDKSurfaceFlinger
0 likes · 30 min read
Understanding Variable Refresh Rate on Android Devices and How to Control It
Coolpad Technology Team
Coolpad Technology Team
May 31, 2022 · Fundamentals

Understanding NFS File Handles, Export Operations, and Their Use in OverlayFS and Syscalls

This article explains how NFS represents files with file handles, details the generation and decoding mechanisms via export_operations, examines the exportfs API implementation, and explores practical applications such as overlayfs integration and the name_to_handle_at/open_by_handle_at syscalls, providing code examples and kernel‑level insights.

KernelNFSexportfs
0 likes · 23 min read
Understanding NFS File Handles, Export Operations, and Their Use in OverlayFS and Syscalls
Coolpad Technology Team
Coolpad Technology Team
May 30, 2022 · Fundamentals

Nano Injection Molding Process for Smartphone Glass Cover Plates

The article introduces a nano‑injection molding solution for smartphone glass cover plates that eliminates uneven gaps and glue overflow, reduces material and assembly costs, and meets narrow‑bezel reliability requirements by integrating a polymer‑glass bonding technique with nanostructured coatings.

Cost reductionglass cover platenano injection molding
0 likes · 5 min read
Nano Injection Molding Process for Smartphone Glass Cover Plates
Coolpad Technology Team
Coolpad Technology Team
May 9, 2022 · Fundamentals

Understanding TCP BBR Congestion Control and Bufferbloat

This article explains the design and operation of TCP BBR (Bottleneck Bandwidth and Round‑trip propagation time), its relationship to bufferbloat, the shortcomings of loss‑based congestion algorithms, and details the BBR phases, gain cycle, source code, advantages, disadvantages, and practical considerations for network engineers.

BBRBufferbloatTCP
0 likes · 21 min read
Understanding TCP BBR Congestion Control and Bufferbloat
Coolpad Technology Team
Coolpad Technology Team
Apr 13, 2022 · Fundamentals

Understanding Network Layers, MAC, DHCP, TCP Handshake/Teardown and Common WiFi Issues on Android

This article explains the purpose of network layering, the role of the MAC layer, DHCP and TCP mechanisms, and provides a systematic analysis approach for common Android Wi‑Fi problems such as connection failures, DHCP issues, authentication errors, disconnections, RSSI weakness, beacon time‑outs, ARP/DNS failures, data stalls, TX/RX anomalies, AP‑side events and roaming triggers.

DHCPMacWiFi
0 likes · 25 min read
Understanding Network Layers, MAC, DHCP, TCP Handshake/Teardown and Common WiFi Issues on Android