Base Station Logical Interfaces for Inter-Cell Coordination

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Solution Overview

Problem

Current wireless communication systems, particularly in 4G networks, face challenges with frequency reuse due to interference between neighboring cells or sectors, leading to high costs and technical difficulties in deploying wide frequency channels, and lack support for inter-base station coordination.

Innovation Solution

Implementing a base station with logical interfaces for control plane and user plane interactions between base stations, enabling inter-base station coordination through single frequency network (SFN), coordinated multi-point (CoMP), and carrier aggregation (CA) technologies.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If frequency reuse factor is increased to reduce interference, then interference between neighboring cells is reduced, but bandwidth utilization and network capacity decrease

Engineering Contradiction:
Improveinterference between neighboring cellsVSAvoidnetwork capacity
Core Design Contradiction:
Object-affected harmful factorsVSProductivity

Solution Approach 1:

The patent merges multiple base stations into a coordinated multi-point system where control modules of different base stations communicate through logical interfaces. This allows multiple cells to transmit on the same frequency simultaneously by coordinating their operations, effectively merging their resources to achieve frequency reuse factor of 1 while maintaining low interference through joint processing and coordination.

Inventive Principle:
Principle #5Merging (Combining)

2Productivity

If frequency reuse factor of 1 is used to increase network capacity, then bandwidth utilization improves, but interference between neighboring cells increases

Engineering Contradiction:
Improvenetwork capacityVSAvoidinterference between neighboring cells
Core Design Contradiction:
ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces control modules as intermediary components that mediate between multiple base stations. These control modules establish logical interfaces for coordination, enabling base stations to share control information and coordinate their transmissions. This intermediary layer allows frequency reuse factor of 1 to be implemented while managing interference through centralized coordination and joint processing.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Productivity

If inter-cell coordination technologies are implemented to support frequency reuse factor of 1, then network capacity increases, but system complexity and deployment difficulty increase

Engineering Contradiction:
Improvenetwork capacityVSAvoidsystem complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the coordination function into separate control modules that are distinct from the data processing modules. Each base station is divided into a control module responsible for coordination through logical interfaces and a data processing module for actual signal processing. This segmentation allows inter-cell coordination to be implemented in a modular fashion, reducing overall system complexity while maintaining frequency reuse factor of 1 capability.

Inventive Principle:
Principle #1Segmentation

4Quantity of substance

If extensive frequency licensing is obtained to increase single cell bandwidth, then bandwidth availability improves, but licensing cost and technical difficulty increase

Engineering Contradiction:
Improvebandwidth availabilityVSAvoidlicensing cost and technical difficulty
Core Design Contradiction:
Quantity of substanceVSEase of manufacture

Solution Approach 1:

The patent enables existing licensed frequency resources to serve multiple cells simultaneously through coordinated multi-point operation. Instead of requiring separate frequency licenses for each cell, the system allows multiple base stations to share the same frequency resources by coordinating their transmissions. This multi-functional use of existing频谱 resources increases effective bandwidth availability without requiring additional frequency licensing, reducing both cost and technical difficulty.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS9755775B2Base station, network system, and communication method
Publication Date: 2017.09.05 HUAWEI TECH CO LTD
  • US9755775B2 patent drawing
  • US9755775B2 patent drawing
  • US9755775B2 patent drawing

AI summary

Embodiments of the present invention provide a base station, a network system, and a communication method. The base station includes: a control module, configured to connect to a control module of at least one other base station by using a first logical interface, and perform control plane interaction during inter-base station coordination; and a data processing module, connected to the control module, and configured to connect to a data processing module of the at least one other base station by using a second logical interface, and perform user plane interaction during the inter-base station coordination. The base station in this embodiment of the present invention is provided with the first logical interface and the second logical interface to respectively implement the control plane interaction and the user plane interaction between base stations, so that the inter-base station coordination can be implemented.