Mobile Base Station Interference Coordination via Location Database
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Solution Overview
Problem
Mobile base stations face challenges in managing inter-cell interference due to their mobility, which complicates the selection of cooperative base stations, especially when their movement tracks are limited, leading to increased cell signaling overhead and reduced communication quality for user equipment.
Innovation Solution
An electronic device and method in a mobile base station that determines a cooperative base station based on location information and motion status by instructing user equipment to measure downlink channel quality at feature locations, recording these associations in a database, and periodically updating the data to select optimal cooperative base stations, thereby reducing inter-cell interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a mobile base station dynamically changes its motion track to avoid coverage collision with stationary base stations, then inter-cell interference is reduced, but the motion track cannot be changed when limited by road constraints (e.g., subway train, bus)
Solution Approach 1:
The patent applies preliminary action by pre-establishing a coordination reference table that stores the relationships between mobile base station locations and suitable cooperative base stations before the mobile base station actually moves. This allows the system to prepare interference coordination strategies in advance, so when the mobile base station cannot change its motion track due to road constraints, the pre-prepared coordination information can still be used to reduce inter-cell interference effectively.
2Object-affected harmful factors
If prior art methods (multicast transmission, resource dispatching) are applied to mobile base stations, then inter-cell interference is addressed, but cell signaling overhead increases due to mobility characteristics
Solution Approach 1:
The patent reduces signaling overhead by pre-establishing a coordination reference table that stores the relationships between mobile base station locations and suitable cooperative base stations. This preliminary preparation allows the system to avoid repeated real-time signaling exchanges that would otherwise be necessary to identify cooperative base stations, thus reducing cell signaling overhead while still effectively addressing inter-cell interference.
Solution Approach 2:
The patent creates a coordination reference table that serves as a copied or pre-computed version of the complex real-time interference coordination information. Instead of performing complex real-time calculations and signaling exchanges to determine cooperative base stations, the system uses this pre-computed table, which copies the essential coordination relationships, thereby reducing the signaling overhead required during actual mobile base station operations.
3Area of stationary object
If a mobile base station serves user equipment in areas with surrounding stationary base stations, then coverage is provided, but user equipment suffers from signal interference and must select a serving base station
Solution Approach 1:
The patent introduces a cooperative base station as an intermediary between the mobile base station and user equipment. The cooperative base station (which is a stationary base station) assists in serving the user equipment by providing coordinated transmission or reception, thereby reducing the signal interference that would otherwise occur between the mobile base station and surrounding stationary base stations. This intermediary approach allows the mobile base station to maintain coverage while mitigating interference through coordinated multi-point operation.
Data Source
AI summary
An electronic device and a method in a mobile base station, the electronic device includes a processor, the processor is configured to: on the basis of one feature location in a predetermined feature location set, indicate a user equipment served by the mobile base station to measure a downlink channel quality of a detectable base station with respect to the one feature location; determine a cooperative base station of the mobile base station with respect to the one feature location on the basis of measurement result reported by the user equipment; and record the one feature location in association with the cooperative base station into a database.