Master-Slave Base Station Cluster Bandwidth Reduction

Solution Overview

Problem

Current heterogeneous networks (HetNets) face challenges in reducing transmission bandwidth and time delay while maximizing resource sharing, particularly in low power base station configurations like RRH and integrated low power base stations.

Innovation Solution

A master-slave base station cluster is formed with a central unit and remote units connected via a remote interface, implementing L1, MAC, RLC, PDCP, and RRC functions to facilitate resource sharing, using PDCP, MAC, RLC, or L1 remote interfaces, which reduces data volume and bandwidth requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If RRH remote manner is used, then resource sharing is improved, but transmission bandwidth and time delay requirements increase

Engineering Contradiction:

Improveresource sharingVSAvoidtransmission bandwidth

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The base station is segmented into a central unit and multiple remote units, where the central unit handles higher layer protocols (PDCP, RLC, MAC) and remote units handle radio frequency functions. This segmentation allows resource sharing across multiple remote units while reducing the data volume that needs to be transmitted over the remote interface, as only processed baseband signals rather than full radio signals need to be transmitted.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The radio frequency processing functions are extracted from the central unit and placed in remote units, which are then connected to the central unit via a remote interface. This extraction allows the central unit to share resources across multiple remote units while the remote interface transmits only the essential baseband signals, reducing bandwidth requirements compared to transmitting full radio signals.

Inventive Principle:

Principle #2Taking out (Extraction)

2Adaptability or versatility

If RRH remote manner is used, then resource sharing is improved, but transmission time delay increases

Engineering Contradiction:

Improveresource sharingVSAvoidtransmission time delay

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The base station is segmented into a central unit and multiple remote units, where the central unit handles higher layer protocols (PDCP, RLC, MAC) and remote units handle radio frequency functions. This segmentation allows resource sharing across multiple remote units while reducing the data volume that needs to be transmitted over the remote interface, as only processed baseband signals rather than full radio signals need to be transmitted, thereby reducing transmission delay.

Inventive Principle:

Principle #1Segmentation

3Quantity of substance

If integrated low power base station is used, then transmission bandwidth and time delay are reduced, but resource sharing is not maximized

Engineering Contradiction:

Improvetransmission bandwidthVSAvoidresource sharing

Core Design Contradiction:

Quantity of substanceVSAdaptability or versatility

Solution Approach 1:

The base station is segmented into a central unit and multiple remote units, enabling resource sharing across multiple locations while keeping transmission bandwidth requirements low. The central unit processes and shares resources among multiple remote units, achieving both resource sharing and reduced bandwidth requirements simultaneously.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The central unit serves multiple remote units with universal resource sharing capabilities, handling PDCP, RLC, and MAC layer functions for all connected remote units. This multi-functionality allows a single central unit to support multiple remote units, maximizing resource sharing while maintaining low transmission bandwidth requirements.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP2924924B1Master-slave base station cluster and information processing method

Publication Date: 2020.06.03 HUAWEI TECH CO LTD

Figure 1~2
Figure 3~4
Figure 5~6

AI summary

Embodiments of the present invention provide a master-slave base station cluster, a central unit, a remote unit, and an information processing method. The master-slave base station cluster includes: a central unit and at least one remote unit, where each remote unit is connected to the central unit through a remote interface; the central unit includes: at least one of a MAC layer function module, an RLC layer function module, a PDCP layer function module, and an RRC function module, and a first interface function module; and each remote unit includes: a second interface function module, an L1 layer function module, and another function module of the MAC layer function module, the RLC layer function module, the PDCP layer function module, and the RRC function module except the function module included in the central unit. The technical solutions of the present invention can reduce the requirements on a transmission bandwidth and time delay, and maximize resource sharing as much as possible.