GRFU_Mapping Between CPRI Ports and Slots on the GSM 3900 Series Base Station-V1.0

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Introduction to the Mapping Between CPRI Ports and Slots on the GSM 3900 Series Base Station

Introduction to the Mapping Between CPRI Ports and Slots on the GSM 3900 Series Base Station

Wireless Product Service DepartmentWireless Product Service Department

For internal use only


Background and Application Principle

Background The layout of the CPRI RF cable connection to the GRFU/DRFU slots is usually complex for field engineers.

To reduce the complexity, this material introduces a mapping principle between CRPI ports and slots to

satisfy the requirements of various scenarios. Used together with the GRFU/DRFU configuration principle

and slot planning principle, the application of this principle implements a comparatively fixed mapping

between the CPRI ports and the cell partition for future capacity expansion and maintenance. In addition,

a graphical configuration tool is developed to quickly output the configuration and connection diagram

for on-site project delivery.


Mapping Principle of the CPRI Ports - Single Cabinet

Mapping between CPRI ports

and slots:

Ports CPRI 0 to 5 on the GTMU

correspond to slots 0 to 5

where the

GRFUs/DRFUs are installed.

The CPRI port that corresponds

to an

empty slot need not be

connected. Mapping between cells and

slots in single-cabinet

configuration mode:

Slots 0 and 1 correspond to

Cell 1.


Cell 2.


Cell 3.

Single Cabinet

cell1 cell2 cell3


Mapping Principle of the CPRI Ports - Two Cabinets

Mapping between CPRI ports and

slots:

Ports CPRI 0, 2, and 4 on the GTMU

correspond to slots 0, 2, and 4

where

the GRFUs/DRFUs are installed in

cabinet 0.

Ports CPRI 1, 3, and 5 on the GTMU

correspond to slots 0, 2, and 4

where

the GRFUs/DRFUs are installed in

cabinet 1.

Mapping between cells and slots in

double-cabinet configuration mode:

Slots 0 and 1 correspond to Cell 1.



Two Cabinets

cell1 cell2 cell3


Mapping Principle of the CPRI Ports - Three Cabinets

Mapping between CPRI ports and slots:

Ports CPRI 0 and 1 are connected to

the

first cabinet.


the

second cabinet.


the

third cabinet.

The CPRI ports are connected to

slots 0

and 3 where the GRFUs/DRFUs are

installed in the cabinet that the

ports

correspond to. Other GRFUs/DRFUs

are

cascaded in order. Mapping between cells and slots in three-

cabinet configuration mode:

One cabinet corresponds to one cell.

…Three Cabinets

cell1 cell3

cell2


Benefit I Used together with the cell planning principle, the application of this

principle implements comparatively fixed cell partition

corresponding to the CPRI ports, thus implementing a clear cell

partition and simple data configuration. The recommended partition

of three cells is shown as follows:

Cell partition in a single cabinet

Cell partition in two cabinets


Benefit I

Cell partition in three cabinets


Benefit II Star interconnection can be applied to the CPRI ports on all the modules so that

great change for the feeder connection is avoided during the capacity expansion. In a typical capacity expansion scenario, the configuration data is modified and the

services are not disrupted even if the CPRI networking mode is changed.

Reserve a slot for capacity expansion.

The corresponding port is also reserved.

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Benefit III

Meeting Huawei requirements on delivery with boards and cable connections

Unifying the configuration principle globally

Tool Advantages

Standardizing on-site configuration and connection operation

Outputting MML scripts after being integrated to the CME in later versions

A useful tool is used to facilitate and standardize operations.


Benefit IV Unified Procedures

Complies with the policy of delivery with boards and cabling requirements. Field engineers need not

install modules and connect cables so that the working hour of on-site installation is reduced. Thus,

the service cost reduces. The tool is used, thus facilitating the data configuration and ensuring the consistency between the

data configuration and the hardware installation. Accurately locates the slot where the faulty board is located, thus increasing the success rate of

remote problem location. Implements smooth upgrade and applies globally standardized data configuration to guarantees the

upgrade.

InstallationDelivery Configuration Commissioning Upgrade

1 2 3 4 5


Benefit V Consistent principle, applied to different products and the same

product of different versions, complies with the evolution trend of

smooth capacity expansion of the network.

GBTS8.1

DBS&BTS3900 V300R008C11

GBTS9.0

DBS&BTS3900 V300R009C00

SRANBTS

DBS&BTS3900 V100R002C00

Thank you

www.huawei.com

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GRFU_Mapping Between CPRI Ports and Slots on the GSM 3900 Series Base Station-V1.0