CoMP Assisting Point for Inter-Cell Coordination
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Solution Overview
Problem
In heterogeneous wireless communication networks, there is a challenge in coordinating Coordinated Multi-Point (CoMP) transmission between macro and small cells due to delayed bearer separation, which limits the effectiveness of CoMP in improving user equipment (UE) performance, especially in areas with overlapping small cell coverage.
Innovation Solution
A CoMP assisting point assists a CoMP participating cell by transmitting assistance information via an inter-cell interface to help in making CoMP decisions, including determining CoMP measurement sets, cooperating sets, and algorithms, thereby enabling effective CoMP transmission between macro and small cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bearer separation is implemented between macro eNB and local eNB, then control plane services are maintained at macro eNB and user plane services are transferred to local eNB, but CoMP transmission coordination between macro and small cells is delayed and effectiveness is limited
Solution Approach 1:
The patent introduces a CoMP management entity as an intermediary component that coordinates between macro eNB and local eNB. This entity collects channel state information from both eNBs, performs CoMP decisions centrally, and distributes the decisions back to the eNBs, thereby resolving the timing coordination issue caused by bearer separation while maintaining the architectural benefits of distributed user plane processing
Solution Approach 2:
The patent implements preliminary action by having macro eNB and local eNB pre-share channel state information and measurement data before CoMP transmission is needed. The CoMP management entity maintains updated channel conditions in advance, so when CoMP transmission is required, the decision can be made quickly based on pre-collected information, reducing the effective decision time
2Productivity
If small cells are deployed in overlapping coverage areas to provide hotspot coverage, then service rate is improved for users in small cells, but interference between concurrent signals from multiple small cells increases
Solution Approach 1:
The patent converts the harmful interference from multiple small cells into a beneficial signal by implementing joint transmission CoMP. Instead of treating signals from overlapping small cells as interference to be avoided, the system coordinates these signals to jointly serve users in overlapping coverage areas, transforming the interference problem into an opportunity for improved service rate through signal cooperation
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting transmission parameters such as precoding matrices, power allocation, and resource block assignment based on channel state information. The CoMP management entity optimizes these parameters for each user equipment, adapting the transmission characteristics to minimize interference while maximizing the service rate in overlapping small cell coverage areas
3Object-affected harmful factors
If CoMP transmission is implemented between macro eNB and local eNB with bearer separation, then interference management is improved, but the complexity of coordination and decision-making increases
Solution Approach 1:
The patent segments the CoMP coordination function into distinct modular components: a CoMP management entity for centralized decision-making, information collection modules at macro eNB and local eNB, and execution modules that implement decisions. This segmentation allows each component to perform a specific function independently, reducing the overall coordination complexity while maintaining effective interference management through structured information flow
Data Source
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AI summary
Disclosed in the present invention are a coordinated multi-point transmission method and network equipment. In the present invention, a CoMP (Coordinated Multi-Point) auxiliary node provides CoMP auxiliary information for CoMP-participating cells via inter-cell interfaces, in order to assist the CoMP-participating cells in realizing CoMP.