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Knowledge Base

How to get LTE Cell ID on AR169G-L

Publication Date:  2016-10-14  |   Views:  2088  |   Downloads:  0  |   Author:  SU1001640116  |   Document ID:  EKB1000320973

Contents

Issue Description

From the information on device, customer cannot get the correct Cell ID, this information is not correct:


==============================================================

  ===============display Cellular 0/0/0 all===============

==============================================================

Modem State:

Hardware Information.

=====================

Model = ME906E

Modem Type = LTE module

Modem Firmware Version =  11.234.46.03.00

Hardware Version = MD1ME906EM

Integrate circuit card identity (ICCID) = 8956023100115821585

International Mobile Subscriber Identity (IMSI) = 730029915944615

International Mobile Equipment Identity (IMEI) = 866714010819315

Factory Serial Number (FSN) = E2H0216421000603

Modem Status = Online

Profile Information.

====================

Profile 1 = ACTIVE

--------

PDP Type = IPv4, Header Compression = OFF

Data Compression = OFF

Access Point Name (APN) = colegios.tmovil.cl

Packet Session Status = Active

* - Default profile

Network Information.

====================

Current Service Status = Service available

Service Domain = Combined

Current Service = Combined

Packet Service = Attached

Packet Session Status = Active

Current Roaming Status = Home

Network Selection Mode = Automatic

Network Connection Mode = WCDMA-GSM

Current Network Connection = WCDMA(WCDMA)

Mobile Country Code (MCC) = 730

Mobile Network Code (MNC) = 02

Mobile Operator Information = movistar

Location Area Code (LAC) = 4010

Cell ID = 3099654

Upstream Bandwidth = 384kbps

Downstream Bandwidth = 384kbps

Radio Information.

==================

Current Band = AUTO

Current RSSI >= -51 dBm (good)

Current RSCP = -47 dBm

Current ECIO = -3 dB

Bands supported :

  GSM: GSM850 GSM900 GSM1800 GSM1900

  WCDMA: WCDMA850 WCDMA900 WCDMA2100 WCDMA1900

  FDD LTE: B1 B2 B3 B5 B7 B8 B20

Modem Security Information.

===========================

SIM ID = 1

PIN Verification = Disabled

PIN Status = Ready

Number of Retries remaining = 3

SIM Status = OK


----------------------------------------------------------------------------------------------------------------------------------------------


We know this is not Cell ID because its value must be < 65536.


Handling Process

We ask customer for the display diagnostic-information output to analyze, and when we check the cell ID, is a value higher than 65536, so we ask RnD to confirm, and they confirmed this value is Uc-Id (UTRAN Cell ID).


The calculation to get the correct Cell ID is:


Cell-id = UC-id  mod  65536



Root Cause

AR169G-L shows UTRAN Cell ID on the Cell ID field.

Solution

We use the value on AR and input this formula to get the right Cell ID customer needs:


Cell-id = UC-id  mod  65536