BTS Attributes

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BTS attributes

Contents

5.2.14.1.2 BTS attributes

5.2.14.1.2 BTS attributes

This describes the BSC attributes, including the site attributes, cell attributes, TRX attributes, and channel

attributes. The users can learn the parameters when querying the BTS attributes.

Site Attributes

Table 1 describes the site attributes.

Table 1 Site attributes

Attribute Name Description

Manufacturer ID Information about the manufacturer of the BTS to be queried.

OML attribute Port number, timeslot number, and sub-timeslot number of the OML.

Operation state Whether the current site is available.

Terminal equipment ID Terminal equipment ID according to the LAPD protocol. The attribute here

indicates the equipment ID of the current site, that is, the terminal equipmentidentifier (TEI) of the OML.

Clock attribute Work status of the BTS clock and information related to the clock parameters.

Extended alarm

configuration

Configuration of the extended alarms of the current site.

Software configuration Software configuration of the current site.

Power supply system

type

Power supply system type of the BTS cabinet.

SFP Mode Connection attributes of the SFP port.

TOP Switch Parameters Information about the port and slot of the TOP switching parameters on the

backplane.

Hardware configuration Hardware configuration of the current site.

Cell attributes

Table 2 describes the cell attributes.

Table 2 Cell attributes


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Management state Management state of the current cell. You can set the state by choosing BTS

Maintenance > Modify Administrative State on the LMT.

BCCH ARFCN Frequency of the main BCCH of the current cell.

BTS Identity Code Consisting of BSIC, NCC, BCC.

Cell air-interface

timer

Duration of timer T3105. This attribute is used in asynchronous cell handover. Unit: ms

CCCH load

indication period

Interval for sending the overload messages.

CCCH load

threshold

Ratio of times of successful random access to total collision times within the time.

Connection failure

criterion

Detailed criterion for determining the connection failure.

Interference

average parameter

Average time for obtaining the interference level. The default value is 20 multiframe.

Interference level

threshold

The interference can be divided into six ranks according to the interference signal level.

The level value for dividing each rank is called interference level threshold.

The BTS determines which rank the current interference level is in and reports this

information to the BSC on the basis of the radio resource indication.

Maximum timing

advance

Maximum timing advance of the most distant area of a cell. This attribute can identify

the actual coverage of a cell.

NY1 Maximum times of sending physical messages.

Operation state Whether the current site is available.

Overload period The BTS calculates the channel usage at a fixed interval to check whether the channel

is overloaded. The interval is determined by the overloading period. Unit: s

RACH busy

threshold

Determining the level threshold of random access. Unit: dBm

RACH load average

timeslots

Measuring the average loading timeslot number for random access channel.

Start frame No. The command can be run in the case of this frame number. If you want to run the

command immediately, set the frame number to 65535.

The value range of frame number is 0 to 42432, and 65535.

T200 Consisting of the following parameters:

SDCCH: timeout duration of T200 defined on the SDCCH over the Um interface

FACCH/Full rate: timeout duration of T200 on the FACCH or full-rate channel at the Um

port

FACCH/Half rate: timeout duration of T200 on the FACCH or half-rate channel at theUm port

SACCH with TCH SAPI0: timeout duration of T200 on the SACCH when the TCH at the

Um port supports the SAPI0 service

SACCH with SDCCH: timeout duration of T2000 on the SACCH with SDCCH


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SDCCH SAIP3: value of T200 when the SDCCH supports the SAPI3 service

SACCH with TCH SAPI3: timeout duration of T200 on the SACCH when the TCH at the

Um port supports the SAPI3 service

VSWR threshold VSWR threshold of the RF voltage, including the VSWR threshold when an antenna

incurs a fault and the VSWR threshold when an antenna is not correctly adjusted.

Available state Current state of the cell.

Frequency hopping

mode

Determining whether to use the FH mode, and what kind of FH mode is used

Extended type &

extended offset

Extended type and extended offset of the current cell.

Frame offset

parameter

The default value of this attribute is 0. This indicates the cell is not offset. If the value is

not 0, the handover mode need be changed from synchronous to asynchronous. If the

value is 255, the BTS does not send this attribute. For BTS3001C and BTS2X BTSs,

the value of this attribute is fixed to 255.

The BTS3X, BTS3002C and double-transceiver BTSs can predict the frame offset

according to the value of frame offset parameter.

Interference band

statistical

algorithm

When the frequency point scanning function is enabled, interference band statistic

algorithm I or interference band statistic algorithm II is used.

Uplink frequency

scan

Uplink frequency scanning result.

TRX attributes

Table 3 describes the TRX attributes.

Table 3 TRX attributes


Management state Management state of the current TRX. You can set the state by choosing BTS

Maintenance > Modify Administrative State on the LMT.

ARFCN list List of channel numbers based on which the channel works. In the case of none FH,

each channel has one channel number. In FH, all the available channel numbers are

listed in the ARFCN list.

Power level The static power is divided into five levels. The value set here indicates the power level

of the current TRX.

Output power

threshold

Maximum RC Power Reduction

Maximum RC

power reduction

Maximum power reduction of each level.

Operation state Whether the TRX is available.

Available state Current state of the TRX.

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power attenuation

level

. ,

between levels is 0.2 dB.

RSL attribute Port number, timeslot number and sub-timeslot number of the RSL link.

Terminal

equipment ID

Information about the terminal equipment.

Channel Attributes

Table 4 describes the channel attributes.

Table 4 Channel attributes


Management

state

Management state of the current channel. You can modify the state by choosing

Modify Administrative State on the LMT.

ARFCN list List of channel numbers based on which the channel works.

In the case of none FH, each channel has one channel number. In FH, all the available

channel numbers are listed in the ARFCN list.

Operation state Whether the channel is available.

Channel

combination

Combination type of the current channel.

Hopping

sequence No.

Numbers of 64 kinds of FH. The number 0 indicates the FH in sequence. Other values

indicate the FH of pseudo-random sequence.

Mobile allocation

index offset

Frequency offset when the TRXs are in FH in the same cell.

Training sequence

code

Demodulation part for estimating the channel feature to correctly decode the valid

information. There are eight kinds of training sequence codes.

Available state Current state of the channel.

Parent topic: Concepts Related to BTS Maintenance
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BTS Attributes

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