Explanation of Tems

8/19/2019 Explanation of Tems

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EXPLANATION OF TEMS

Figure above is the layout display of TEMS Investigation 2.03 on the Map worksheet.

Here, is the explanation of the elements in every windows on that worksheet.


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2. Current Channel

TimeShow current time refers to computer time. Time format is hh:mm:ss.ss

CGICell Global Identity. Consists of Mobile Country Code, Mobile Network Code, Location

Area Code and Cell Identity. Presented on the format "MCC MNC LAC C".

MCCMobile Country Code.

Example: 510 for Indonesia

MNC

Mobile Network Code.900 MHz: 00, ..., 99

1800 MHz: 00, ..., 99

1900 MHz: 000, ..., 999.

Example: 10 for Telkomsel

LACLocation Area Code.

CICell Identity

Display the Cell Identity of the current serving cell..


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BSIC

Base Station Identity CodeDisplaying the BSIC of the current serving cell.

BCCH ARFCN

Absolute Radio Frequency Channel Number of Broadcast Control Channel.

ModeMode here, representing the MS mode of measurement. It display with code number, as

follows:

1: No service2: Idle mode

3: Dedicated mode.

TCH ARFCNAbsolute Radio Frequency Channel Number of Traffic Channel.

Valid only in dedicated mode and only for channels where no frequency hopping is used.

Time slotTimeslot used for current call. Valid only in dedicated mode.

Channel TypeChannel Type indicating which speed coder is used.

Channel ModeRepresenting activity on channel:

1."Signalling only",

2.speech transmission (e.g. "Speech full rate version 1") or3.data transmission (e.g. "Data 12.0 Kbit/s radio interface rate").

Sub Channel ModeNumber of subchannel used in SDCCH or TCH half-rate channel

Hopping Channel

Indicating the use of frequency hoping (“YES” or “NO”)

Hopping Frequencies

The hopping frequency list in text format, for example "f1, f2, f3, f4".

MAIO

Mobile Allocation Index Offset. Valid only if hopping is used. Indicates where in thehopping frequency list to start.

HSNHopping Sequence Number indicating which hopping frequency list to use.


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3. Port Configuration

4. Serving + Neighbors

CellnameName of serving cell. Present only if a cell definition file is used.

Calculated using five different algorithms.

BSIC

Base Station Identity Code.BSIC of the serving cell and also the neighbors.

ARFCN

Absolute Radio Frequency Channel NumberARFCN of the serving cell and its neighbors.

RXLevReceived signal strength.

Received signal strength of the serving cell and its neighbors


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5. Radio Parameters

RxLevLevel of Received signal strength.

RxQual

Received signal quality level, measured base on BER (bit error rate). The value isbetween 0-7, the lower the better.

FERFrame erasure rate

1. Frame erasure rate (FER) Full (%). Calculated as:

(number of erased block/total number of blocks)*100

A block is erased when the parity check (CRC, Cyclic Redundancy Check) fails

2. FER Sub (%).

Frame erasure rate, but calculated only on the blocks that the base station has tosend (i.e. total number of blocks is 2: 1 TCH with SID information and 1

SACCH). See FER Full (%).

Such sub values are useful mainly when downlink DTX is used.

SQI

Speech Quality Index.The parameter used by TEMS to measure Speech Quality. SQI has been designed to

cover all factors that RxQual lack to measure.

SQI computation considers the factors:

- the bit error rate (BER)

- the frame erasure rate (FER)


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- data on handover events

- statistics on the distribution of these parameters.

The range depends on the speech codec used:

FR (Full Rate): -19 ... 22

EFR (Enhanced Full Rate): -20 ... 30.

TxPowerTransmit Power of mobile station. Valid only in dedicated mode.

DTX

Use of DTX (Discontinuous Transmission). Calculated as:2 mandatory blocks are always sent using DTX: 1 TCH (with SID information) and 1

SACCH .

The function of DTX is to reduce the interference level in the network. This feature,

will reduce transmit power, when a person uses MS, not talking, while in dedicatedmode.

TATiming Advance. Valid only in dedicated mode.

The function of TA is to measure how far the distance of MS, from BTS or serving

cell. It’s also can be used to limit a maximum distance that a cell can serve.

RL Timeout Counter (Act)

Uses the "leaking bucket principle". Each decoded block increases the counter by 1

(if it is not already at max) and each failed block decreases the counter by 2. The call

is terminated when the counter drops to 0.

RL Timeout Counter (Max)Initial value of Radio Link Timeout counter.

C1

Path loss criterion parameter.

C2

Cell reselection criterion parameter.

MS Behavior ModifiedIndicates whether the mobile station's behavior has been changed from the default:0: No modification of mobile behavior

1: Modification of behavior not related to channel selection (the information elements

Multiband Reporting, Adjacent Scan, Forced Power Class, Band Control, ChannelQuality)


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2: Modification of channel selection behavior (the information elements Ignore Cell

Barred, Serving Cell List Active, Prevent Handover List Active, Disable Handover,Target Handover).

Explanation of Tems

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