Forced Cell Reselection Bypassing LTE Access Barring Delays
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Solution Overview
Problem
Access barring in LTE networks significantly delays connection attempts, impacting user experience, as mobile devices are unable to promptly establish connections due to restricted access through serving cells, leading to prolonged wait times for services like internet browsing and calls.
Innovation Solution
A mobile communications device is configured to force cell reselection to alternative cells or reselect a different radio access technology (RAT) if access is barred, allowing it to establish connections through neighboring cells or alternative networks, thereby bypassing access barring delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If access barring is implemented in LTE network to control traffic, then network traffic management is improved, but connection establishment time increases significantly
Solution Approach 1:
The patent segments the network access problem by identifying multiple serving cells and attempting connection establishment in parallel across different cells when access is barred in the current cell. This segmentation allows the device to bypass the access barring delay in one cell by attempting connections in other cells simultaneously or sequentially, thus reducing overall connection establishment time while the network maintains traffic control through access barring mechanisms.
2Reliability
If mobile device waits for access barring timer to expire, then network access control is maintained, but user experience deteriorates due to prolonged wait times
Solution Approach 1:
The patent applies preliminary action by proactively scanning for and identifying alternative serving cells before the access barring timer expires. The device prepares a list of candidate cells and attempts connection establishment in advance, so that when access is barred in the current cell, it can immediately switch to alternative cells without waiting for the timer to expire, thus maintaining network access control while significantly improving user experience.
3Stability of the object's composition
If device attempts connection in current serving cell only, then connection stability is maintained, but access speed decreases when barring is applied
Solution Approach 1:
The patent transitions from a single-dimension approach (one serving cell) to a multi-dimensional approach by introducing the spatial dimension of multiple serving cells. The device monitors and attempts connections in multiple cells simultaneously, adding this new dimension to the connection establishment process. This allows the system to maintain connection stability through careful selection of alternative cells while dramatically improving access speed by having multiple potential connection paths available when barring is applied.
Data Source
AI summary
A method and apparatus for forced cell/RAT reselection is disclosed. In one embodiment, a cellular mobile communication device may attempt to access a network through a serving cell. Responsive to determining that access to the network is barred through the serving cell, the mobile communication device may determine if another cell is available through which it may obtain access to the network. If another cell providing network access is available, the mobile communication device may force reselection from the serving cell to the new cell. If no other cell providing access to the network is available to the mobile communication device, a forced reselection of a radio access technology may be performed.