BTS3900 Data Configuration

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BTS3900 Data Configuration

This document is summarized from the 79 sites swapped last year, in the

passed swap, we made much small mistake which induced the result that

although the site could be up after cutover, but the performance was bad than

before. Here I will sweep over the whole configuration procedure, and

emphasize on the mistake we usually made before, pls everybody pay special

attention to the points that are stressed here

1. Configuration Procedure

Take the site T1833 as an example, S222/444, for reference only

1.1 Add site

Pls choose Active here, while the Cfg RFU by slot can be ignoredtemporary

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1.2 Add cell

1.3 Configure site attribute

PAY SPECIAL ATTENTION HERE.

In 900M/1800M dual-frequency, two-cabinet, stack mode site, every pair of

GRFUs in a cabinet is connected to one CPRI port on the BBU, and the two GRFUs in

each pair are cascaded. The GRFUs in cabinet 1 are connected to CPRI ports 0, 2, and 4

on the BBU, and the GRFUs in cabinet 2 are connected to CPRI

For detailed info, pls refer to the file

1.3.1 Add RXU chain

Add 6 RXU chains in sequence

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1.3.2 Add RXU

Refer to the corresponding relationship between cells and CPRI cable ports

on BBU, the words highlight in red before. 900M cells/GRFU should be

configured to SFP 0/2/4, 1800M cells/GRFUs should be configured to SFP 1/3/5,in cascade mode.

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1.3.3 Bond logical TRX

TRXs should be even distributed to two boards, like 2+2 for 4-TRX cell and

3+3 for 6-TRX cell

1.3.4 Configure RXU attribute

For dual-GRFU cell, every GRFU should be configured to Single feeder

(1TX+2RX); for single-GRFU cell, the GRFU here should be Double feeder

(1TX+2RX).

Exception: some indoor sites with indoor antenna distribution system like

PICO system, considering PICO offer two jumper cables to one GRFU, but only

one TX and one RX, these sites should be configured to Double feeder

(1TX+1RX) . T1703/T1722/T1043/T1086 are these sites

1.3.5 Configure chain

Check how many E1 ports the original site has, add the ports if needed

1.3.6 Configure cell attribute

All the small points in the picture below must be same as before,

this heavily affects the performance if they are wrong.

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Channel type for all the channels should be correct and half rate

switch should be open

Configure the same TRX No. as before, otherwise the TRX performance in

M2000 will be inconsistent with before

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In order to match the power between BTS3900 and BTS312, you need to

configure the power here for each TRX, pls ask for help from Mr. Piers and

Chen

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1.3.7 Configure site idle timeslots

The number of site idle timeslots should be as same as before,

meanwhile, one EDGE cell at least has 3 idle timeslots

1.3.8 Manually batch modify three parameters

Call Control --- Random Access Error Threshold --- 255 Channel Management --- Multi-density TRX Power Sharing --- None

Other Properties--- Support Half Rate

Check the following parameters and their value

Parameter Value

RACH Min.Access Level(dbm) -109

RACH Busy Threshold 16

RXLEV_ACCESS_MIN 8

BS-PA-MFRAMS 2 MultiframePeriod

Use Imm_Ass RetransmitParameter

Yes

STIRC Allowed Yes

1.3.9 Configure PTP BVC for every cell

1.3.10 Modify cfg mode

Modify site attribute Cfg RFU by slot to be yes

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1.3.11 Manually synchronize the relative BSC6000 after swap

1.3.12 Write down power-off and power-on time and all work log, which is very important

for performance and on which the network problem(s) will be detected based.

2. DEMU and FMUs connection and configuration

1. DEMU

DEMU monitoring signal cable should be connected to MON 1 and

configured on slot 1

2. FMU and Fan Box

The monitoring signal cable should be cascaded connected between 900M

and 1800M cabinet fan boxes. The route is from MON 0 to 900M fan COM IN

port, and from 900M fan COM OUT to 1800M fan COM IN. Correspondingly,900M FMU should be configured on slot 8, while 1800M FMU is on slot 9

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BTS3900 Data Configuration