Articles / Gsm

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GSM Control Channel Processing Through Physical Layer

Explore GSM control channel processing in the physical layer, covering SACCH, FACCH, BCCH, PCH, AGCH, and more, as per 3GPP TS 45.003.

gsm control channel physical layer

GSM Downlink Packet Switched (PS) Call Flow Explained

Learn about the packet switched (PS) call flow in GSM downlink for data transfer. Understand GPRS attach, PDP context activation, and the channels involved.

gsm packet switching call flow

GSM Handover/Cell Reselection Failures: CRC Error Analysis

Explore the causes of GSM handover and cell reselection failures due to CRC errors, including interference, power issues, and algorithm limitations.

gsm crc error cell reselection

GSM Issue: UE Receives DM Instead of UA After Sending SABM

Explanation of a GSM network issue where a UE sends a SABM frame but receives a DM response instead of the expected UA, indicating connection establishment failure.

gsm radio link protocol ue

GSM Mobile Terminated (MT) Call Flow Explained

Understand the GSM Mobile Terminated (MT) call flow, including message exchanges between the UE and network layers, and channels used.

mobile communication gsm call flow

GSM Physical Layer (Layer-1) Explained

Explore the GSM physical layer (layer-1) functions, including baseband processing, FEC, ciphering, burst formation, and modulation for mobile station transmission.

gsm physical layer modulation

GSM Protocol Stack and Architecture Explained

Explore the GSM protocol stack and architecture for Mobile Stations (MS) and Base Transceiver Stations (BTS), covering Layer 1 (PHY) and Layer 2 (LAPD, LAPDm).

gsm protocol stack mobile communication

GSM Protocol Stack: Layer 3 Overview

Explore GSM Layer 3 responsibilities, covering RRM, MM, CM, SCCP, and BSSMAP protocols. Understand message types and protocol discriminators.

gsm protocol stack layer 3

GSM Traffic Channel Processing in the Physical Layer

Explore GSM traffic channel processing through the physical layer, covering speech and data channels as per 3GPP TS 45.003.

gsm physical layer speech channel

GSM Uplink Packet Switched Data Call Flow

Explore the packet switched (PS) data call flow in GSM uplink, detailing GPRS attach and PDP context activation between mobile devices and network elements.

gsm packet switching data communication