CoMP Handover via X2 Interface Pre-allocation
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Solution Overview
Problem
In next-generation mobile communication systems like LTE-A, handovers between base stations using CoMP technology are inefficient, leading to reduced success ratios and throughput due to the target base station's inability to immediately adopt CoMP technology during handovers, affecting high data volume services and overall system performance.
Innovation Solution
The method involves the target base station receiving information about the user equipment's current CoMP set and allocating a new CoMP set, enabling immediate adoption of CoMP technology post-handover, thereby enhancing handover success ratios and system throughput by avoiding unnecessary interference and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the target base station uses the original handover process, then the handover procedure is simple, but the target base station cannot immediately adopt CoMP technology, reducing handover success ratio and system throughput
Solution Approach 1:
The patent applies preliminary action by having the target base station pre-allocate a CoMP set for the user equipment before the handover is completed. The handover request message includes information about the current CoMP set, and the target base station uses this information to pre-configure the new CoMP set. This allows the CoMP technology to be immediately activated after handover without waiting for subsequent configuration messages, thereby improving handover success ratio while managing complexity through advance preparation.
2Productivity
If the target base station pre-allocates a new CoMP set using the invention method, then CoMP technology can be immediately adopted post-handover improving throughput, but the handover signaling and processing become more complex
Solution Approach 1:
The patent merges the CoMP set allocation process with the existing handover signaling procedure. The handover request message, which already exists in the standard protocol, is enhanced to include information about the current CoMP set. The target base station uses this embedded information to perform the new CoMP set allocation without requiring separate signaling messages. This combining approach enables immediate CoMP adoption post-handover, improving system throughput while minimizing additional signaling complexity by reusing existing message structures.
3Reliability
If the target base station receives CoMP set information from the source base station, then seamless CoMP adoption is enabled, but the information exchange and processing requirements increase
Solution Approach 1:
The patent applies preliminary action by having the source base station include current CoMP set information in the handover request message sent to the target base station before handover execution. This advance provision of information allows the target base station to immediately perform the new CoMP set allocation without requiring additional information exchange after handover. The seamless transition is achieved because all necessary CoMP configuration data is already available to the target base station in advance, eliminating gaps in CoMP technology continuity.
Data Source
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AI summary
Embodiments of the present invention provide a base station handover method, an X2 interface setup method, a base station, a user equipment and a system, which relate to the field of communications technologies and enable a user equipment to immediately adopt a CoMP technology after completing handover, thereby raising the success ratio of the handover and the system throughput. The method includes: sending a handover request instruction to a second base station, where the handover request instruction includes information of a first coordinated multi-point set of a user equipment; receiving a handover request response from the second base station, where the handover request response includes information of a second coordinated multi-point set allocated by the second base station for the user equipment; and sending the information of the second coordinated multi-point set to the user equipment. The embodiments of the present invention are used by the user equipment to be handed over between the base stations.