Variable Back-off Timing for Random Access Congestion

The patent implements dynamic back-off time adjustment where the UE modifies its retransmission timing based on detected network congestion conditions. Instead of fixed retransmission intervals, the device dynamically extends back-off periods when congestion is detected, allowing network recovery and reducing collision probability, thereby improving random access success rate while maintaining call establishment efficiency.

The patent employs feedback mechanisms where the UE monitors network responses to random access requests and adjusts subsequent transmission timing based on this feedback. When random access failures or congestion indicators are detected, the device uses this information to extend back-off times for retransmissions, creating a closed-loop control system that adapts to network conditions and improves access reliability.

The patent dynamically adjusts retransmission timing based on network conditions rather than using fixed fast retransmission. When congestion is detected, the back-off time is extended, which reduces power consumption by avoiding unnecessary rapid retransmissions. When network conditions are good, faster retransmission is maintained, preserving call establishment speed. This dynamic approach resolves the contradiction between speed and energy consumption.

The patent changes the time parameter of random access retransmissions based on detected network congestion. By modifying the back-off time parameter dynamically - extending it when congestion is present and maintaining shorter intervals when network conditions are favorable - the system optimizes both power consumption and call establishment speed according to actual network state.

The patent implements self-service where the UE autonomously detects network congestion conditions and adjusts its own back-off timing without requiring complex network coordination or additional signaling. The device monitors random access responses and autonomously modifies retransmission timing, providing simple yet effective congestion avoidance that improves success rate while maintaining low device complexity.

The patent introduces dynamic parameter adjustment of back-off time based on simple congestion detection. Rather than implementing complex access procedures, the system modifies the time parameter of retransmissions based on straightforward monitoring of network responses. This simple parameter change approach significantly improves random access reliability while adding minimal complexity to the device.