5G and 6G Networks: The Complete Guide to Next-Generation Wireless

1. Device sends request to nearest 5G gNB base station
2. Massive MIMO + Beamforming: beam directed at device
3. Signal processed at edge (MEC) — latency-sensitive decisions here
4. Non-latency-sensitive data routed to 5G Core (5GC)
5. Network Slicing: traffic classified and placed in correct slice
6. QoS policy applied: guaranteed bandwidth/latency per slice
7. Data exits to Internet, cloud, or peer device
8. Response follows same path back — round-trip: ~1-10ms

// Example: Fetching low-latency edge data from a 5G MEC node
// MEC nodes expose local APIs for proximity-based services

const MEC_ENDPOINT = 'https://mec-local.operator.com/api/v1';

// Get nearby edge node location and capabilities
const getEdgeCapabilities = async () => {
  const response = await fetch(`${MEC_ENDPOINT}/capabilities`, {
    headers: {
      'Authorization': 'Bearer ' + mecToken,
      'X-MSISDN': userMsisdn,  // mobile subscriber ID
    }
  });
  return await response.json();
};

// Subscribe to real-time IoT sensor stream via 5G
const subscribeToSensorStream = (deviceId, callback) => {
  const ws = new WebSocket(`wss://mec-local.operator.com/streams/${deviceId}`);
  ws.onmessage = (event) => {
    const sensorData = JSON.parse(event.data);
    // Latency: <5ms from sensor to app via MEC
    callback(sensorData);
  };
};

{
  "deviceId": "sensor-factory-line-42",
  "timestamp": "2026-03-25T14:30:00.001Z",
  "networkSlice": "industrial-low-latency",
  "latency_ms": 2.3,
  "readings": {
    "temperature_celsius": 74.2,
    "vibration_hz": 120.5,
    "pressure_bar": 2.1
  },
  "location": {
    "type": "indoor-positioning",
    "x_meters": 12.4,
    "y_meters": 8.7,
    "accuracy_cm": 30
  },
  "batteryLevel": 0.87,
  "signalStrength_dbm": -72
}