LTE Base Station Cell Information Change Notification
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Solution Overview
Problem
There is a lack of an effective optimizing scheme in LTE networks for network coverage and capacity when changes occur to serving cells or their neighboring cell lists, despite existing solutions like X2 Information Update.
Innovation Solution
A method for notifying cell information changes between base stations via serving cell change messages, including adding, deleting, or modifying cell information, which allows for automatic updates of neighboring cell lists using the X2 interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a first base station sends serving cell change messages to second base stations to notify of cell changes, then network coverage and capacity optimization is achieved, but but air interface load and power consumption increase
Solution Approach 1:
The patent extracts and separates the cell change notification function from general signaling traffic by introducing a dedicated serving cell change message type. This allows the notification function to be performed independently and efficiently without burdening the general air interface, thereby reducing overall power consumption while maintaining reliable network optimization.
Solution Approach 2:
The patent implements preliminary action by having the first base station proactively notify second base stations of serving cell changes before these changes affect network performance. This advance notification allows second base stations to update their neighboring cell lists in advance, preventing suboptimal switching decisions and reducing the need for corrective signaling, thereby optimizing network coverage and capacity while minimizing energy-wasting retransmissions.
2Loss of information
If serving cell change messages are sent to notify cell changes, then neighboring cell list updates are achieved, but but message signaling overhead increases
Solution Approach 1:
The patent extracts the essential cell change notification function from complex signaling sequences by defining a dedicated serving cell change message with only the necessary information elements (cell ID, change type). This minimized signaling payload achieves accurate neighboring cell list updates while keeping message overhead low, as the notification contains only critical data without redundant information.
Solution Approach 2:
The patent utilizes parameter changes by encoding cell change information in a structured message format that includes cell identity and change type parameters. This parameterized approach allows second base stations to efficiently parse and process only the relevant information for updating their neighboring cell lists, reducing signaling overhead while maintaining update accuracy.
3Productivity
If automatic optimization of neighboring cell lists is implemented, then switching strategy performance is improved, but but system complexity increases
Solution Approach 1:
The patent implements self-service by enabling second base stations to automatically update their neighboring cell lists upon receiving serving cell change messages. Each base station independently processes the notification and performs the necessary updates without requiring centralized coordination or complex inter-base-station negotiations, thereby improving switching strategy performance while keeping system complexity manageable through distributed autonomous operation.
Solution Approach 2:
The patent applies parameter changes by using a standardized message structure with defined information elements that convey cell change information. This parameterized approach simplifies the automatic optimization process, as base stations can systematically interpret and act upon the parameters in the serving cell change message without requiring complex decision logic, thus improving productivity while controlling system complexity.
Data Source
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AI summary
The present invention disclose a method for notifying the change of cell information, which comprises: a first base station sends a serving cell change message to a second base station, wherein the serving cell change message carries one or more of the following information: cell adding information, cell deleting information, cell modifying information; in response to the serving cell change message, the second base station updates local information according to the information carried in the serving cell change message. With the present invention, the neighboring cell list may be updated in time, the management of the neighboring cell list performed by the base station is facilitated, and the switching strategy is optimized.