[Base Station Encyclopedia] UBBP Boards for BBUs (BBU Boards, Best Fri ...

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Rosakitty   银牌会员    发表于 2014-9-23 14:49:17   最新回复:2019-07-14 17:10:51

 

 

What is a UBBP?

The universal baseband processing unit (UBBP) can serve as a baseband processing board working in any mode.

A UBBP board can be configured in either a BBU3900 or a BBU3910.

 

For details, see section "UBBP" in BBU Hardware Description.


 

What are the functions and working principle of a UBBP board?

The UBBP performs the following functions:

l  Multiplexes baseband resources among different modes, thereby supporting multimode concurrency.

l  Provides CPRI ports for communication with RF modules and processes uplink and downlink baseband signals.

The working principle of the UBBP is shown in the following figure.

 

For details, see section "UBBP" in BBU Hardware Description.


 

What are the types of UBBP boards?

From SRAN9.0 onwards, UBBP boards are classified into the following types: UBBPd1, UBBPd2, UBBPd3, UBBPd4, UBBPd5, UBBPd6, and UBBPd9.

All UBBP boards have the same appearance: On the upper left of a UBBP panel, there is a silkscreen "UBBP". On the lower left of a UBBP panel, there is a label indicating the type of a UBBP board.

 

For details, see section "UBBP" in BBU Hardware Description.


 

What modes are supported by UBBP boards?

Board Type

Applicable Mode

UBBPd1

l  GSM single mode

l  UMTS single mode

l  GU baseband concurrency

UBBPd2

UBBPd3

l  GSM single mode

l  UMTS single mode

l  LTE FDD single mode

l  GU baseband concurrency

l  GL baseband concurrency

UBBPd5

UBBPd4

l  GSM single mode

l  UMTS single mode

l  LTE FDD single mode

l  LTE TDD single mode

l  GU baseband concurrency

l  GL baseband concurrency

UBBPd6

l  GSM single mode

l  UMTS single mode

l  LTE FDD single mode

l  LTE TDD single mode

l  GU baseband concurrency

l  GL baseband concurrency

l  UL baseband concurrency

l  GUL baseband concurrency

UBBPd9

LTE TDD single mode

For details, see section "UBBP" in BBU Hardware Description.


 

Each mode can use multiple UBBP boards. How to select UBBP boards for each mode at a site?

The principles for configuring UBBP boards are as follows:

First, select UBBP boards according to the mode in which the UBBP boards work in. For example, if the GSM mode is used, select any of the following UBBP boards: UBBPd1, UBBPd2, UBBPd3, UBBPd4, UBBPd5, and UBBPd6.

Second, select UBBP boards according to specifications required by each mode. For example, if the GSM mode is used and more than 24 2R carriers are required, only the UBBPd5 and UBBPd6 boards can be used.

Third, select UBBP boards according to the mode to which the current mode is to be evolved. For example, if the base station now works in GSM mode and needs to work in GUL mode in the future, only the UBBPd6 board can be used because the UBBPd5 board does not support GUL baseband concurrency.

For details, see section "BBU Board Configuration" in 3900 Series Base Station Configuration Principle (Global).


 

Is a UBBP in a BBU3900 configured in the same slot as that in a BBU3910?

No matter whether it is in a BBU3900 or BBU3910, a UBBP can be configured in any of slots 0 to 5, as shown in the following figure:

 

When configured in a BBU3900, UBBP boards in different slots provide different capabilities.

l  In UMTS mode, only the UBBP board in slot 2 or 3 can provide CPRI ports.

l  In GSM mode, the UBBP board in any of slots 0 to 3 can provide CPRI ports.

l  In LTE mode, the UBBP board in any of slots 0 to 5 can provide CPRI ports.

When configured in a BBU3910, UBBP boards in different slots provide the same capabilities, that is, the UBBP board in any slot can provide CPRI ports.

For details, see section "UBBP" in BBU Hardware Description.


 

What are the functions of the HEI port on a UBBP panel?

In a triple-mode base station, the HEI port on a UBBP/WBBPf in a BBU is connected to the HEI port on a UBBP/WBBPf in the other BBU to transmit baseband data between two BBUs through UBBP+UBBP, WBBPf+UBBP, or WBBPf+WBBPf.

Currently, only the UBBP boards working in UMTS mode support baseband interconnection.

 

For details, see BBU Interconnection Feature Parameter Description and section "Inter-BBU Signal Cable Connections" of chapter "Cable Connections" in 3900 Series Base Station Cables.


 

What impact can be brought on services carried by a base station when a UBBP board is replaced, or removed and inserted again?

Replacing, or removing and inserting again a UBBP board has the following impact on services carried by a base station:

l  When the UBBP serving as the converging party in a base station using the CPRI MUX feature is reset abnormally or removed and inserted again, data and voice services of the converged party will be interrupted.

l  When the UBBP serving as the converged party in a base station using the CPRI MUX feature is reset abnormally or removed and inserted again, data service rate of the converging party will decrease. However, voice services of the converging party will not be affected.


 

Can a UBBP be used as a spare part to replace a WBBP or LBBP?

No, a UBBP cannot be used as a spare part to replace a WBBP or LBBP.

If a WBBP or LBBP needs to be replaced by a UBBP, software configurations need to be modified after hardware replacement is complete.

In terms of hardware, the operations of replacing a WBBP with a UBBP are the same as those of replacing a WBBP with a new WBBP. For details, see section "Replacing the WBBP" in the corresponding site maintenance guide. For details about the configuration modification, see GBSS&RAN Reconfiguration Guide for BSC6910 and eRAN Reconfiguration Guide.



Do you want to learn more about UBBP boards?

Then, show your questions!


 

For more information, you can visit Wireless Network Information Center

 

Product Solution Version Product Version Link
BBU Hardware Description SRAN9.0 MBTS V100R009C00 BBU Hardware Description
BBU Hardware Description SRAN10.1 MBTS V100R010C10 BBU Hardware Description
BBU Hardware Description SRAN11.1 MBTS V100R011C10 BBU Hardware Description

This post was last edited by Cilla.luodan at 2016-03-30 17:17.
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faz   白金会员    发表于 2015-9-30 03:20:14

Thanks for sharing.
c.deiana   高级会员    发表于 2015-11-22 00:41:33

What an easy and fun way to introduce boards description. I like it
moataz_alsbak   新手上路    发表于 2015-11-22 18:37:05

appreciate your efforts
PG   小试牛刀    发表于 2015-11-23 11:36:17

keep sharing
m7g   钻石会员    发表于 2015-11-30 20:34:45

I think in the future it would be better to show the real picture equipment and to show them a description. Schematically - is good, but better photos :)
Wanchay   新手上路    发表于 2016-3-31 09:35:39

greate
faijaz   小试牛刀    发表于 2016-3-31 18:56:56

Good sharing
ADON   小试牛刀    发表于 2016-4-22 06:30:40

Please show in the UBBP table the maximum capacity of each UBBP board together with the application modes..and hopefully have links for replacing the WBBP with a UBBP board etc.
Hocine   小试牛刀    发表于 2016-5-3 19:07:26

Thanks, Good description
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