Coordinated Multipoint Interference Mitigation via X2 Interface
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Solution Overview
Problem
Coordinated multipoint (CoMP) schemes in wireless networks face limitations due to the lack of standardization in proprietary interfaces between remote radio heads (RRHs) and base stations, restricting interference mitigation and throughput enhancement across different vendor networks, especially for user equipment at the edge of base station coverage areas.
Innovation Solution
Implementing a method where interference reports from one base station to another are used to adjust beamforming and transmission power settings for subframes, allowing for coordinated multipoint transmission to mitigate interference, using backhaul communication links and standardized interfaces like X2 communication channels to coordinate between base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If proprietary interfaces are used between RRHs and base stations, then implementation flexibility is maintained, but interoperability and interference mitigation across different vendor networks deteriorate
Solution Approach 1:
The patent applies universality by implementing a standardized X2 communication interface that enables multiple base stations from different vendors to interoperate. This standardized interface allows the system to achieve both implementation flexibility and reliable interference mitigation by providing a universal communication protocol that works across different vendor networks, eliminating the limitation of proprietary interfaces.
2Productivity
If coordinated multipoint transmission is implemented, then interference mitigation and throughput enhancement are improved, but system complexity and standardization requirements worsen
Solution Approach 1:
The patent applies the intermediary principle by introducing a standardized X2 communication interface as a mediator between base stations. This intermediary layer simplifies the coordination complexity by providing predefined communication protocols and message formats, allowing coordinated multipoint transmission to be implemented without excessive system complexity. The standardized interface acts as a mediator that handles the complex coordination tasks automatically.
3Productivity
If base stations coordinate downlink transmissions, then spectral efficiency is improved, but communication overhead and signaling complexity worsen
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmission parameters such as beamforming vectors, power allocation, and resource block assignment based on channel conditions and interference measurements. The standardized X2 interface enables efficient exchange of these parameter information between base stations, allowing coordinated downlink transmissions to improve spectral efficiency while minimizing communication overhead through optimized parameter updating strategies.
Data Source
AI summary
Examples are disclosed for causing one or more subframes to be transmitted from a base station for a wireless network based on beamforming or transmission power characteristics. In some examples, an interference report may be received at a base station via a backhaul communication link. The interference report may indicate measured interference from the base station as measured at one or more wireless devices. The base station may transmit subsequent subframes in a manner to mitigate the previously reported interference. Other examples are described and claimed.