[FabNotes30] 第十五周：网络和通信

这周学习网络通信.

串口

asynchronous 异步

• RS-232, RS-422, RS-485
• video

I2C

• TWI
• USI
• software
• library

SPI library

USB

• AVR, LUFA
• STM32
• V-USB

OSI layers

• 7: application 应用 (HTTP)
• 6: presentation 表现层 (SSL)
• 5: session 会话 (RPC)
• 4: transport 传输 (TCP, UDP)
• 3: network 网络 (IP)
• 2: data link 数据链路 (MAC)
• 1: physical 物理层 (PHY)

物理介质

• capacity: bandwidth * log_2 (signal/noise)

• wired

  single-ended, differential, powerline
  open collector, open drain
  transmission (pass) gate, tri-state
  transmission line
  waveguide
  TIA RS232, 422, 485
  802.3 ethernet
     chip module
  SONET optical fiber
  

• wireless

  • FCC, Part 15, ISM
  • 802.11, Wi-Fi
  • Wi-Fi, ZigBee
  • 6LoWPAN
  • Bluetooth
  • optical: transmitter, receiver

modulation 调制

• PCM: Pulse-Code Modulation 脉冲编码调制
• PPM: Pulse-Position Modulation
• OOK: On-Off Keying 通断键控
• FSK: Frequency-Shift Keying 频移键控
• BPSK: Binary Phase-Shift Keying 二进制相移键控
• QAM: Quadrature Amplitude Modulation 求积分振幅变调
• OFDM: Orthogonal Frequency-Division Multiplexing 正交频分多路
• FHSS: Frequency-Hopping Spread Spectrum 跳频扩频
• DSSS: Direct-Sequence Spread Spectrum 直接序列扩频
• UWB: Ultra-WideBand 超宽带

channel sharing 信道共享

• ALOHA

• Master-Slave

• Token Ring

• TDMA: Time-Division Multiple Access 时分多址

• FDMA: Frequency-Divsion Multiple Access 频分多址

• CSMA: Carrier-Sense Multiple Access 载波监听

  • CD: Collision Detection
  • CA: Collision Avoidance
  • 1-persistent: transmit when clear
  • nonpersistent: random backoff
  • p-persistent: probability to transmit

• CDMA: Code-Division Multiple Access 码分多址

• MIMO: Multiple-Input Multiple-Output 多输入多输出

• PDMA": Physical-Division Multiple Access

errors 错误

• detection, correction
• block, convolution codes
• parity, checksum, Hamming, Reed-Solomon, Turbo

networking 网络

• Internet protocols
  • IPv4, IPv6
  • DNS, DHCP 动态主机配置协议, NAT, private
  • UDP (User Datagram Protocol)用户报文协议, TCP (Transmission Control Protocol)传输控制协议
  • HTTP 超文本传输协议
  • BGP (Border Gateway Protocol) 边界网关协议, AODV
  • sockets
  • SLIP
• APTP

RF 射频

• radios: oscillator, mixer, PA, LNA, IF, I/Q, demod, baseband, filters
• antennas: Q, antenna gain, impedance matching
• single-chip
  • MICRF (300-470 MHz)
  • MRF49XA (433/868/915 MHz)
  • nRF905 (433/868/915 MHz)
  • nRF24L01+ (2.4 GHz ISM)
  • CC2541 (2.4 GHz Bluetooth)
  • ESP8266 (2.4 GHz Wi-Fi)
• software radio

课程资源

• Fab Academy 2016 课表
• Week15 课程视频
• Week15 课程大纲
• 我的英文笔记 Gitbook
• 公众号文章列表