Base Station Handover with Congestion Feedback
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Solution Overview
Problem
In communication systems, handovers to congested base stations exacerbate network congestion, leading to inefficient data communication and decreased overall network utilization.
Innovation Solution
A communication system where a first base station requests a handover to a second base station, which responds with congestion information, allowing the first base station to send a handover command to the user terminal with data transmission control instructions based on the congestion state, enabling the user terminal to adjust its data rate or amount according to the congestion status of the second base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If handover is performed to continue data communication, then communication continuity is maintained, but network congestion worsens and overall network utilization efficiency decreases
Solution Approach 1:
The patent changes the parameter of data transmission rate dynamically based on base station congestion state. When handover occurs to a congested base station, the system adjusts the data transmission rate parameter downward to flatten traffic distribution, thereby maintaining communication continuity while improving overall network utilization efficiency
Solution Approach 2:
The patent implements feedback by having the target base station report its congestion state information back to the source base station before handover. This feedback mechanism enables the source base station to make informed decisions about data transmission rate adjustment, resolving the contradiction between maintaining communication continuity and improving network utilization
2Device complexity
If handover request is sent without congestion information, then handover process is simple, but traffic cannot be flattened and network utilization remains inefficient
Solution Approach 1:
The patent applies preliminary action by obtaining congestion state information from the target base station before the handover is executed. This allows the source base station to prepare appropriate data transmission control commands in advance, enabling traffic flattening without adding significant complexity to the handover process
Solution Approach 2:
The patent uses congestion state information as an intermediary element between the source and target base stations. This information mediator enables coordinated traffic management during handover, improving network utilization efficiency while keeping the handover process relatively simple through standardized information exchange
Data Source
AI summary
A communication system comprising: a first base station having a first controller and a second base station having a second controller, wherein the first controller transmits a handover request to the second base station when a handover to the second base station is required for a user terminal, the second controller transmits a handover response including congestion state information at the second base station to the first base station in response to receiving the handover request, and the first controller transmits a handover command including the congestion state information or a data transmission control command according to the congestion state information to the user terminal in response to receiving the handover response.