Coordinated Multipoint Uplink Interference Management
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Solution Overview
Problem
Current wireless communication systems face challenges in coordinating uplink communications across multiple base stations, leading to interference and reduced throughput, especially for user equipment at cell edges, due to inadequate resource allocation and interference coordination techniques.
Innovation Solution
The method involves identifying a coordinated multipoint (CoMP) set of eNodeBs, transmitting uplink configuration information to facilitate coordinated operations, and using techniques like spatial division multiple access (SDMA) and interference cancellation to manage resource allocation and interference, ensuring efficient uplink transmissions on shared channels like PUSCH, PUCCH, and PRACH.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple eNodeBs transmit on overlapping resources to increase system capacity, then resource utilization improves, but inter-cell interference increases
Solution Approach 1:
The invention segments the CoMP set into a serving eNodeB and non-serving eNodeBs, with each having distinct roles in uplink reception. The serving eNodeB performs primary reception while non-serving eNodeBs perform interference cancellation, dividing the interference management function into specialized segments that work together to resolve the contradiction between resource utilization and interference control.
Solution Approach 2:
The invention introduces an intermediary coordination mechanism where the serving eNodeB transmits uplink configuration information to non-serving eNodeBs, indicating which uplink transmissions should be cancelled. This intermediary signaling enables coordinated interference cancellation across multiple eNodeBs, allowing resource overlap while maintaining signal quality through structured interference management.
2Reliability
If uplink configuration information is transmitted to all eNodeBs to enable coordinated reception, then uplink communication quality improves, but signaling overhead increases
Solution Approach 1:
The invention applies local quality by providing different types of information to different eNodeBs based on their roles. The serving eNodeB receives complete uplink configuration information for primary reception, while non-serving eNodeBs receive targeted cancellation indications. This localized information distribution enables coordinated reception without requiring all eNodeBs to process the full configuration set, reducing overall signaling overhead while maintaining communication quality.
Data Source
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AI summary
Devices, systems, methods and/or computer program products are provided to facilitate coordinated multipoint transmission and reception of communications in a wireless network. In some scenarios, different set of resources are allocated for uplink transmissions of multiple user equipment. In other scenarios collision avoidance and/or multiplexing techniques are used to enable reception and decoding of multiple uplink transmissions on the same or overlapping resources at the same time. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the disclosed subject matter. Therefore, it is to be understood that it should not be used to interpret or limit the scope or the meaning of the claims.