Technical Explanation for Huawei Dual-Mode BTS Evolution

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HUAWEI TECHNOLOGIES CO., LTD.

www.huawei.com

Huawei Confidential

Technical Explanation For HUAWEI Dual-mode BTS Evolution


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Contents

Dual-mode BTS Evolve Scenarios

What We Need to Do for BTS Mode

Evolution


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Add hardware

GSM/UMTS Evolution

G

GG

G

G+U

G+U

G+U G

U

G+U

G+UG+U

RF evo

lutio

n by

SDR

G/U will co-exist for a long time

U

U

U U

Move GTMU

Add hardware


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Contents

Dual-mode BTS Evolve Scenarios

What We Need to Do for BTS Mode

Evolution


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BTS - Smooth Evolution

Common platform of G/U/L for smooth migration Hardware sharing for GSM/UMTS/LTE by SDR to save the investment One MRRU/MRFU supports 6 GSM, or 4 UMTS carriers BBU shared by any RF

GSM

GSM

GS M

GS M

GS M

GS M

U M TS

UMTS

UMTS

GSM GSM + UMTS

Different RF

Co-Cabinet

Add UMTS card

in BBU

Different RF

Co-Cabinet

Add LTE card

in BBU

GSM + UMTS+LTE

LTE

LTE

LTE

Co-Cabinet

GS M

GS M

GS M

U M TS

UMTS

UMTS

Future version Evolution

GSM

GSM+UMTS

2G

3G2G

UMTS

RRU3908 MRFU

SDR

SDR: Software-defined radio

3G3G

BBU3900

BBU F

A

N WBBP

WBBP

GMPT

WMPT

PWR

PWR


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Typical configuration for GSM only

GTMU

FAN

PWR

PWR

RRU3908 RRU3908 RRU3908

The GTMU includes the function of main control, transmission, clock and interfacing three CPRIs to three RRU3908.

The GTMU includes the function of main control, transmission, clock and interfacing three CPRIs to three RRU3908.

GO GOGO


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Appearance of the BBU3900

GTMUGSM Transmission & Timing & Management Unit for BBUConfiguration quantity: 0 or 1, mandatory in GX mode.WMPTWCDMA Main Processing & Timing unit Configuration quantity: 0 to 2, mandatory in UX mode.WBBPWCDMA Baseband Processing unitConfiguration quantity: 0 to 4, mandatory in UX mode.

GTMUGSM Transmission & Timing & Management Unit for BBUConfiguration quantity: 0 or 1, mandatory in GX mode.WMPTWCDMA Main Processing & Timing unit Configuration quantity: 0 to 2, mandatory in UX mode.WBBPWCDMA Baseband Processing unitConfiguration quantity: 0 to 4, mandatory in UX mode.


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Appearance of the RRU3908

Mode Total Number of Carriers

Number of GSM Carriers of PA1

Number of UMTS Carriers of PA2

Power per GSM Carrier (Power not Shared) (W)

Power per GSM Carrier (Power Shared) (W)

Power per UMTS Carrier (W)

GxUy 2 1 1 20 20 40

3 2 1 15 15 30

4 3 1 10 12 30

3 1 2 20 20 20

4 2 2 10 10 20

5 3 2 10 12 15


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Hardware change:• WMPT and WBBP are needed to be added to meet the typical 2G/3G application.

• CPRI cables are necessary to connect between GTMU and WBBP.

Iub and Abis Transmission :

Interface Iub can share the Abis transmission resource. When the primary Abis transmission resource is not

enough, additional transmission resource can be added either on GTMU or WMPT.

Hardware change:• WMPT and WBBP are needed to be added to meet the typical 2G/3G application.


Iub and Abis Transmission :

Interface Iub can share the Abis transmission resource. When the primary Abis transmission resource is not

enough, additional transmission resource can be added either on GTMU or WMPT.

GSM Only Evolve to GU Dual Mode

GO GOGO

GTMU

FAN

PWR

PWR

RRU3908 RRU3908 RRU3908Abis

CPRI

GTMU

FAN

PWR

PWR

RRU3908 RRU3908 RRU3908Abis

WBBP WMPT

+ Iub

GU GU GU

CPRI

GSM ONLY

GSM&UMTS


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Software change and configuration:• The data of NodeB and relative logical target in RNC should be configured.

• RRU’s work mode should be GSM&UMTS in NodeB.

• The switch of SFP interface on GTMU should be configured consistent with hardware connection.

• The work mode of RRU should be changed into GSM&UMTS in BSC maintenance terminal.

• The UMTS software include WMPT,WBBP,RRU3908 should be downloaded and activated via

NodeB maintenance terminal.

Influence:• In the whole procedure, GTMU will not restart.

• RRU3908 will restart automatically when the UMTS software of RRU has been activated. At this

time, the GSM cell on the same RRU will be influenced until the RRU runs normally.

Software change and configuration:• The data of NodeB and relative logical target in RNC should be configured.

• RRU’s work mode should be GSM&UMTS in NodeB.

• The switch of SFP interface on GTMU should be configured consistent with hardware connection.

• The work mode of RRU should be changed into GSM&UMTS in BSC maintenance terminal.

• The UMTS software include WMPT,WBBP,RRU3908 should be downloaded and activated via

NodeB maintenance terminal.

Influence:• In the whole procedure, GTMU will not restart.

• RRU3908 will restart automatically when the UMTS software of RRU has been activated. At this

time, the GSM cell on the same RRU will be influenced until the RRU runs normally.

GSM Only Evolve to GU Dual Mode


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Change the Working Mode of MBSC


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Networking Application Between the BBU3900 and RRU3908/MRFU

The networking modes between the BBU3900 and

RRU3908/MRFU include the convergence

connection on the CPRI panel and two-star

connection. The MRFU supports only the two-star

connection. For a new site, the two-star

connection is first selected for the RRU3908. For

the expansion and upgrade, the convergence

connection on the CPRI panel can be selected as

required.


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Convergence connection on the CPRI panel

If the RRU/RFU in GSM only or UMTS only mode is used,

the CPRI interface can be from the GTMU or WBBP.

WBBP

WBBP

UFAN

UPEUWBBP

WBBP

WMPT

GTMU

RF module

RF module

RF module

GU

BBUCPRI Optical


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Two-star connection in GU mode

2G and 3G data can be transmitted on their own CPRI optical cables to implement decoupling. In this way, 2G and 3G equipment can coexist.

WBBP

WBBP

UFAN

UPEUWBBP

WBBP

WMPT

GTMU

RFU/RRU

RFU/RRU

RFU/RRU

BBU

2G Data3G Data


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Hardware change:

• GTMU board must be removed while the whole site work in UMTS only mode. (This procedure will lead to all

the service suspend of the site )

• CPRI cables from GTMU to RRU and from WBBP to GTMU are not necessary without GTMU board.

• CPRI cables are necessary to connect between RRU3908 and WBBP.

• Transmission of interface Iub should be connected to WMPT .

Hardware change:

• GTMU board must be removed while the whole site work in UMTS only mode. (This procedure will lead to all

the service suspend of the site )

• CPRI cables from GTMU to RRU and from WBBP to GTMU are not necessary without GTMU board.

• CPRI cables are necessary to connect between RRU3908 and WBBP.

• Transmission of interface Iub should be connected to WMPT .

GU Dual Mode Evolve to UMTS Only

FAN

PWR

PWR

RRU3908 RRU3908 RRU3908

WBBP WMPT

Iub

UO UOUO

UMTS only

FAN

PWR

PWR

RRU3908 RRU3908 RRU3908

WBBP WMPT

Iub

Abis +

GTMU

GU GU GU

GSM&UMTS


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Software change and configuration:

• The configuration of 2G BTS should be deleted.

• The work mode of RRU should be changed into UMTS only in UMTS system.

• The software version of BBU and RRU need not to be changed.

Influence:• It will impact whole site 3G traffic • In the whole procedure, WMPT and WBBP will not restart.• RRU3908 will restart automatically when the CPRI cables is moved and

GSM/UMTS cells service will be suspended until the RRU runs normally.

Software change and configuration:

• The configuration of 2G BTS should be deleted.

• The work mode of RRU should be changed into UMTS only in UMTS system.

• The software version of BBU and RRU need not to be changed.

Influence:• It will impact whole site 3G traffic • In the whole procedure, WMPT and WBBP will not restart.• RRU3908 will restart automatically when the CPRI cables is moved and

GSM/UMTS cells service will be suspended until the RRU runs normally.

GU Dual Mode Evolve to UMTS Only


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Hardware change:

• GTMU is needed to be added to meet the 2G application.

• CPRI cables should be changed to connect between RRU and GTMU. (This procedure will lead to the

service suspend of the site )


• Transmission of interface Abis should be added.

Hardware change:

• GTMU is needed to be added to meet the 2G application.

• CPRI cables should be changed to connect between RRU and GTMU. (This procedure will lead to the

service suspend of the site )


• Transmission of interface Abis should be added.

UMTS Only Evolve to GU Dual ModeRRU3908

FAN

PWR

PWR

RRU3908 RRU3908

WBBP WMPT

Iub

UO UOUO

FAN

PWR

PWR

RRU3908 RRU3908 RRU3908

WBBP WMPT

Iub

Abis +

GTMU

GU GU GU

GSM&UMTS


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Software change and configuration:• The data of 2G BTS should be configured.

• RRU’s work mode should be GSM&UMTS and SFP interface should be configured consistent

with hardware connection.

• The work mode of RRU should be changed into GSM&UMTS in NodeB maintenance terminal.

• The GSM software of GTMU should be downloaded and activated via BSC maintenance terminal

Influence:• It will impact whole site 3G traffic while hardware connecting.

• In the whole procedure, WMPT and WBBP will not restart.

• RRU3908 will restart automatically when the CPRI cables is moved and UMTS cells service will

be suspended until the RRU runs normally.

Software change and configuration:• The data of 2G BTS should be configured.

• RRU’s work mode should be GSM&UMTS and SFP interface should be configured consistent

with hardware connection.

• The work mode of RRU should be changed into GSM&UMTS in NodeB maintenance terminal.

• The GSM software of GTMU should be downloaded and activated via BSC maintenance terminal

Influence:• It will impact whole site 3G traffic while hardware connecting.

• In the whole procedure, WMPT and WBBP will not restart.

• RRU3908 will restart automatically when the CPRI cables is moved and UMTS cells service will

be suspended until the RRU runs normally.

UMTS Only Evolve to GU Dual Mode


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GSM/UMTS Flexible Configuration

Conditions:

• Whole site works in GSM&UMTS dual mode

• Site must have one GSM cell at least.

• RRU should connect to GTMU

• Only change RRU work mode or capacity

No hardware change in dual mode flexible configuration change.

Conditions:

• Whole site works in GSM&UMTS dual mode

• Site must have one GSM cell at least.

• RRU should connect to GTMU

• Only change RRU work mode or capacity

No hardware change in dual mode flexible configuration change.

GTMU

FAN

PWR

PWR

RRU3908 GUAbis

WBBP WMPT

+ Iub

A CB

RRU3908 GSM RRU3908 UMTS


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GSM/UMTS Flexible Configuration

Original Mode Target Mode Hardware Software configuration Software Version

GSM only GSM&UMTS No change RRU mode and SFP change Change to GU

GSM only UMTS only No change RRU mode and SFP change Change to UMTS

GSM&UMTS GSM only No change RRU mode and SFP change Change to GSM

GSM&UMTS UMTS only No change RRU mode and SFP change No change

UMTS only GSM only No change RRU mode and SFP change Change to GSM

UMTS only GSM&UMTS No change RRU mode and SFP change No Change

Change of RRU mode (Not concern transmission resource and UMTS baseband capacity)

Influence: • In the whole procedure, the boards in BBU will not restart.

• RRU will restart when the work mode is changed and service on the RRU will suspend until the RRU runs normally.

Influence: • In the whole procedure, the boards in BBU will not restart.

• RRU will restart when the work mode is changed and service on the RRU will suspend until the RRU runs normally.


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IP sharing transmission

As shown in Figure 4-9, the dual-mode BTS can use the FE port (electrical port or optical port) or E1/T1 port. The 3G main control board provides routing functions for 2G traffic, and 2G traffic can be sent to the 3G transmission board through the interconnection between FE ports. In this way, the protocol termination and data distribution can be implemented. In addition, the 3G IP protocol stack should provide related router functions such as DHCP relay and ARP proxy for 2G traffic. Currently, the 3G version already supports the functions.

IP MW/PTN/IP MW/PTN/NGSDH/IP MPLSNGSDH/IP MPLS

RNC

BSC

IP over E1/FE

2G BSC data

NodeB integrate BTS data into IP over E1/FE pipe

PTN/Router/LAN switch, router the traffic to RNC and NodeB according to different VLAN

IP over E1/FE

GE

GE

3G data

2G BTS data

GTMU

WMPT

FE E1

FE E1/FE

IP MW/PTN/IP MW/PTN/NGSDH/IP MPLSNGSDH/IP MPLS

RNC

BSC

IP over E1/FE

2G BSC data

NodeB integrate BTS data into IP over E1/FE pipe

PTN/Router/LAN switch, router the traffic to RNC and NodeB according to different VLAN

IP over E1/FE

GE

GE

3G data

2G BTS data

GTMU

WMPT

FE E1

FE E1/FE


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字体 : 黑体副标题 :24-28pt

字体颜色 : 反白字体 : 细黑体

HUAWEI TECHNOLOGIES CO., LTD.

www.huawei.com

Huawei Confidential

Thank You !

www.huawei.com

Technical Explanation for Huawei Dual-Mode BTS Evolution

Documents

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