Base Station Backhaul Failure Session Suspension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communications networks face connectivity issues due to temporary failures in backhaul networks, particularly in small cells, which can lead to disconnection of mobile devices and wastage of network resources during reconnection.
Innovation Solution
Implementing techniques at base stations to detect backhaul network failures and suspend radio frequency (RF) sessions temporarily, using explicit messages or transparent buffering methods, allowing mobile devices to resume normal communication once the failure is resolved without reestablishing network connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobile devices attempt to maintain continuous RF sessions during backhaul network failures, then network connectivity is preserved, but network resources are wasted due to failed reconnection attempts and session establishment overhead
Solution Approach 1:
The base station performs preliminary actions by detecting backhaul link failures and proactively suspending RF sessions before the mobile device attempts reconnection. This prevents the mobile device from wasting resources on futile reconnection attempts, as the suspension message is sent in advance to indicate that the session is temporarily suspended rather than terminated
Solution Approach 2:
The base station acts as an intermediary between the backhaul network and the mobile device. It monitors the backhaul link status and mediates the RF session state by sending suspension messages to mobile devices when failures are detected, thereby protecting mobile devices from direct exposure to backhaul network issues and preventing resource wastage
2Loss of energy
If mobile devices disconnect during backhaul network failures, then network resources are freed for other uses, but network connectivity is lost and reestablishment time is required
Solution Approach 1:
The base station sends a preliminary suspension message to the mobile device before the RF session is terminated. This preliminary action allows the mobile device to understand that the session is temporarily suspended due to backhaul issues, enabling faster resumption without full reconnection procedures when the backhaul link is restored
Solution Approach 2:
The system dynamically adjusts the RF session state based on backhaul link conditions. Instead of a static disconnect-reconnect model, the session transitions to a suspended state that can be quickly resumed, creating a dynamic response that adapts to network conditions and minimizes both resource wastage and reconnection time
3Reliability
If base stations implement backhaul failure detection and session suspension mechanisms, then seamless connectivity recovery is achieved, but device complexity and signaling overhead increase
Solution Approach 1:
The base station leverages its existing monitoring capabilities to detect backhaul link failures as part of its normal network management functions. By using self-service mechanisms already present in the base station infrastructure, the patent avoids adding significant external complexity while achieving reliable failure detection and session suspension
Data Source
AI summary
Communication sessions with mobile devices may be suspended, in a wireless communications network, after failure of one or more backhaul network links In one implementation, a device may detect failure of a backhaul network connecting a cell site to a core portion of a wireless network; and suspend, based on the detected failure, communication sessions with mobile devices connected to the cell site through radio interfaces, the suspending of the communication sessions including preventing loss of the communication sessions despite the failure of the backhaul network. The device may further detect cessation of the failure of the backhaul network; and resume, based on the detected cessation of the failure of the backhaul network, the communication sessions with the mobile devices.