Base Station Air Interface Communication for Handover Delay Reduction
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Solution Overview
Problem
In LTE radio communication architectures, the X2 interface's reliance on Ethernet and multiple routers introduces delays, making it challenging to meet high handover delay requirements, especially when multiple information interactions are needed between base stations.
Innovation Solution
The method involves receiving and parsing system messages directly through an air interface, allowing LTE base stations to communicate efficiently with other LTE or heterogeneous base stations by broadcasting system messages in a specific format, such as ASN.1, which can include handover-related information like cell load and system bandwidth, thereby reducing the need for X2 and S1 interface interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If base stations communicate through X2 interface using Ethernet and multiple routers, then communication coverage and connectivity are improved, but communication delay increases and handover efficiency deteriorates
Solution Approach 1:
The patent extracts the essential handover information (cell load, system bandwidth, neighbor cell list) from the complex X2 interface communication protocol and transmits it directly through the air interface using system messages. This removes the unnecessary Ethernet routing layer for handover signaling, reducing delay while maintaining communication coverage through existing base station broadcast capabilities
Solution Approach 2:
The patent introduces system messages as an intermediary carrier that base stations broadcast to convey handover information directly to source base stations. This intermediary mechanism replaces the multi-router Ethernet path with a direct air interface transmission, achieving faster information delivery without sacrificing network coverage flexibility
2Loss of information
If multiple information interactions are performed between base stations through X2 interface, then information completeness is improved, but communication complexity and delay increase
Solution Approach 1:
The patent merges multiple information interaction functions into a single system message broadcast. Instead of performing separate X2 interface interactions for cell load, system bandwidth, and neighbor cell information, the base station combines all these elements into one comprehensive system message that source base stations can receive and parse in a single operation, reducing communication complexity while maintaining information completeness
Solution Approach 2:
The patent implements preliminary action by having target base stations pre-package all necessary handover information into system messages before any handover decision is made. Source base stations can proactively retrieve this information through air interface reception and parsing, eliminating the need for multiple sequential information requests and responses that would increase communication complexity and delay
Data Source
AI summary
A method and an apparatus for obtaining information from a target base station are disclosed. The method includes: when a source base station needs to obtain information from a target base station, receiving, through an air interface, a system message in a certain format broadcast by the target base station; and parsing the system message, and obtaining required information. Through the present invention, an LTE base station can communicate with another LTE base station or with a heterogeneous base station directly through an air interface, thereby increasing the efficiency of communication between base stations.