CoMP Handover Data Stream Redirection via Channel Quality
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Solution Overview
Problem
Common handover mechanisms are not applicable for coordinated multipoint (CoMP) transmission networks, where multiple base stations coordinate to manage mobile station connections, requiring a method to redirect data streams effectively during handovers between base stations.
Innovation Solution
A method for performing a handover procedure in a CoMP network involves estimating the mobile station's location using channel quality information, redirecting data streams from one group of base stations to another, and initiating the handover by sending signals between base stations and the network component, ensuring seamless data transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If common handover mechanisms are used in CoMP networks, then the handover procedure can be simplified, but the network cannot effectively redirect data streams between coordinated base stations
Solution Approach 1:
The patent segments the handover procedure into distinct phases: measurement phase (collecting channel quality information from multiple base stations), decision phase (determining handover necessity based on measurements), and execution phase (redirecting data streams to target base station). This segmentation allows complex CoMP handover to be managed through standardized interfaces while maintaining reliability.
Solution Approach 2:
The patent introduces a coordination entity as an intermediary that manages data stream redirection between base stations. This intermediary component handles the complex routing decisions, allowing individual base stations to use simple handover mechanisms while the coordinator ensures reliable data stream redirection across the CoMP network.
2Productivity
If multiple base stations coordinate to manage mobile station connections, then network performance is improved, but handover mechanisms become inapplicable
Solution Approach 1:
The patent creates a universal handover framework that works for both traditional single-base-station networks and CoMP networks. The framework includes standardized measurement reporting, handover decision criteria, and execution procedures that can be adapted to different network architectures, making the handover mechanism versatile across various deployment scenarios.
Solution Approach 2:
The patent implements preliminary actions before handover by pre-establishing data stream paths and preparing target base stations. Channel quality information is collected in advance from multiple base stations, and resource allocations are pre-configured, enabling seamless handover execution without service interruption in CoMP networks.
3Reliability
If data streams are redirected during handover, then seamless transmission is maintained, but location estimation complexity increases
Solution Approach 1:
The patent employs feedback mechanisms where mobile stations continuously report channel quality information to serving and neighboring base stations. This feedback loop enables accurate location estimation through signal strength comparison without requiring complex positioning systems, maintaining reliability while controlling complexity through information-based rather than computation-intensive methods.
Data Source
AI summary
The invention relates to a method for performing a handover procedure in a wireless coordinated multipoint (CoMP) transmission network (200; 700) of a mobile station (100) from a first base station (1) to a second base station (2), wherein the first base station coordinates a first group (202) of base stations, the first base station being a member of the first group, and the second base station coordinates a second group (204) of base stations, the second base station being a member of the second group, and wherein a network component (102) is adapted to transmit data to the first base station and the first group of base stations and/or to the second base station and the second group of base stations.