## 5 Tactile Internet Application Requirements
### Discussion on Application Requirements
* Edge Computing Capability and AI Integration One of the approaches to reduce latency and network congestion is the processing of data near the edge. For Tactile Internet, edge nodes must process data with minimal delay to predict near-future action and send just the feedback [52; 53]. 5G employs multi-access edge computing for local data processing. 6G will have AI-driven edge computing with adaptive resource allocation for near-instantaneous processing. It will also adopt AI-native networks with autonomous optimization, self-healing mechanisms, and proactive security. Such an approach will reduce backhaul dependency and enhance real-time interactions for Tactile Internet. * Interactivity To facilitate seamless interaction between users and connected devices, Tactile Internet requires a response time of less than 10 ms for natural interactions. Faster interaction is crucial for certain applications, such as remote surgery, immersive AR/VR, and haptic control applications. 5G achieves it through URLLC, while 6G targets latency of less than 1 ms, using AI-based adaptive network management. * Jitter Variability in latency over time for Tactile Internet applications should be less than 100 us to avoid any impact on real-time applications. Ultra-low jitter ensures smooth haptic feedback and real-time sensory synchronization. 5G can have less than 100 us jitter with URLLC, while 6G envisions less than 10 us jitter through AI-optimized scheduling. * Haptic Feedback Quality The precise tactile interactions for Tactile Internet applications require force feedback resolution of less than 0.1 N with less than 1 ms latency. This can be achieved in 5G with URLLC and edge computing. 6G will have AI-driven haptics with near-instantaneous feedback. High-quality haptic feedback improves performance in remote surgery, robotic control, and others. * Multi-Sensory Integration Synchronization of multiple sensory inputs, such as touch, vision, audio, motion feedback, etc., is crucial for real-time immersive experiences [33]. For practical applications, it must occur in less than 10 ms. 5G achieves this through URLLC, and 6G will target it with AI-driven real-time processing and edge computing. * Biocompatibility For Tactile Internet, biocompatibility is the seamless integration of cutting-edge communication technologies with the human body, ensuring the safety, minimal biological interference, and long-term usability of wearables [40; 54; 55]. As the applications require neural interfaces, implants, and haptic feedback wearables, they must comply with international biocompatibility standards, such as ISO 10993. 5G has capabilities limited to wearables for health monitoring, prosthetics, and remote diagnostics. However, 6G aims for wearable and implantable biocompatible integrated sensors, AI-driven physiological monitoring, and energy-efficient data transmission, minimizing thermal and electromagnetic exposure. * Localization Accuracy In the Tactile Internet, localization accuracy plays a crucial role in accurate spatial awareness. For applications that require haptic-enabled high-precision, even slight deviations might cause operational disruptions. Localization improves real-time responsiveness by ensuring seamless communication between users, devices, and virtual environments. 5G networks use advanced positioning techniques, including beamforming, massive MIMO, and multi-access edge computing (MEC) to achieve localization precision of less than one meter. 6G is targeting the use of reconfigurable intelligent surfaces, quantum positioning systems, and AI to bring accuracy to sub-centimeter levels [41]. * Interoperability Interoperability between technologies ensures seamless communication between different networks, devices, and protocols for real-time interactions across different platforms [47]. Tactile Internet requires a unified framework that allows heterogeneous devices to exchange data with minimal latency and high reliability.