Multipriority Backoff Timer Control for Wireless Communication Systems

The patent segments the backoff timer mechanism into two distinct timers: MM backoff timer for mobility management operations and SM backoff timer for session management operations. This segmentation allows independent control of different operation types, enabling fine-grained priority management for multipriority MTC devices without requiring a complete redesign of the congestion control system.

The patent introduces dynamic priority-based timer selection where the applicable backoff timer (MM or SM) is determined based on the priority level of the operation and current network conditions. High-priority operations can bypass certain timer restrictions while low-priority operations are subject to stricter backoff controls, creating a dynamic adaptation mechanism that responds to changing network states.

The patent applies different backoff timer restrictions to different operation types based on their priority levels. Mobility management operations and session management operations are subject to different timer constraints (MM backoff timer vs. SM backoff timer), allowing critical operations to maintain higher flexibility while non-critical operations are more strictly controlled during congestion periods.

The patent changes the backoff timer parameters dynamically based on operation priority and network congestion state. The timer values and applicability are adjusted according to the specific operation type and current network conditions, allowing the system to optimize between congestion control and operation flexibility by modifying timer parameters rather than using fixed restrictions.