LTE Link Parameter for Early Load Balancing
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Solution Overview
Problem
In overloaded LTE or 4G wireless telecommunications networks, user equipment remains camped on a single cell and cannot reselect a less loaded carrier or radio access technology, leading to inefficient load balancing, as existing methods require extensive signaling messages and are unaware of user equipment capabilities at the time of connection rejection.
Innovation Solution
A method where a link parameter is transmitted to user equipment indicating that a dedicated communication link with an overloaded cell is unavailable, allowing user equipment to proactively seek alternative carriers or radio access technologies, even without a established connection, thereby reducing network load and enabling seamless handovers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If access class barring or RRC connection rejection is used to relieve network overload, then network load is reduced, but user equipment cannot reselect alternative carriers or radio access technologies
Solution Approach 1:
The network performs preliminary action by including reselection information in the RRC connection rejection message before the user equipment can attempt connection. This preliminary provision of alternative carrier information enables the user equipment to immediately reselect a different carrier without needing to establish a connection first, thus resolving the contradiction between reducing network load and maintaining carrier reselection capability.
2Productivity
If priority lists are provided to user equipment during idle mode, then load balancing is improved, but extensive signaling messages are required and network disruption occurs
Solution Approach 1:
The invention extracts the essential reselection information from the complex idle mode priority list mechanism and incorporates it directly into the RRC connection rejection message. This extraction approach provides the necessary load balancing information only when needed (during connection rejection) rather than requiring continuous signaling during idle mode, thus reducing signaling complexity while maintaining load balancing effectiveness.
3Ease of operation
If user equipment remains camped on overloaded cell, then connection establishment is simplified, but network load balancing is inefficient
Solution Approach 1:
The network provides feedback information about alternative carriers directly in the RRC connection rejection message. This feedback mechanism informs the user equipment about available alternative carriers without requiring the user equipment to repeatedly attempt connections to the overloaded cell, thus maintaining connection simplicity while improving network load balancing efficiency through informed reselection.
Data Source
AI summary
A method of balancing user equipment traffic load between at least two cells supported by a base station in a wireless telecommunication network, a computer program product and network access node operable to perform that method. The method comprising: determining that an operational parameter of at least one of the at least two cells meets criteria indicative of an overload of user equipment traffic; transmitting a link parameter which indicates that establishment of a dedicated communication link with the base station within the at least one cell is unavailable to user equipment operating within the at least one cell without an established dedicated communication link. Aspects allow for early balancing of load within an overloaded network.