<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>In order to access the cell in all mobile communication technologies a so called random-access procedure is used. For example in GSM this is represented by sending the CHANNEL REQUEST message from Mobile Station (MS) to Base Transceiver Station (BTS) which is consequently forwarded as an CHANNEL REQUIRED message to the Base Station Controller (BSC). If the BTS decodes some noise on the Random Access Channel (RACH) as random access by mistake (so- called ‘phantom RACH') then it is a question of pure coincidence which èstablishment cause’ the BTS thinks to have recognized. A typical invalid channel access request or phantom RACH is characterized by an IMMEDIATE ASSIGNMENT procedure (assignment of an SDCCH or TCH) which is not followed by sending an ESTABLISH INDICATION from MS to BTS. In this paper a mathematical model for evaluation of the Power RACH Busy Threshold (RACHBT) in order to guaranty in advance determined outage probability on RACH is described and discussed as well. It focuses on Global System for Mobile Communications (GSM) however the obtained results can be generalized on remaining mobile technologies (<italic>ie</italic> WCDMA and LTE).</p></abstract>

In order to access the cell in all mobile communication technologies a so called random-access procedure is used. For example in GSM this is represented by sending the CHANNEL REQUEST message from Mobile Station (MS) to Base Transceiver Station (BTS) which is consequently forwarded as an CHANNEL REQUIRED message to the Base Station Controller (BSC). If the BTS decodes some noise on the Random Access Channel (RACH) as random access by mistake (so- called ‘phantom RACH') then it is a question of pure coincidence which èstablishment cause’ the BTS thinks to have recognized. A typical invalid channel access request or phantom RACH is characterized by an IMMEDIATE ASSIGNMENT procedure (assignment of an SDCCH or TCH) which is not followed by sending an ESTABLISH INDICATION from MS to BTS. In this paper a mathematical model for evaluation of the Power RACH Busy Threshold (RACHBT) in order to guaranty in advance determined outage probability on RACH is described and discussed as well. It focuses on Global System for Mobile Communications (GSM) however the obtained results can be generalized on remaining mobile technologies (ie WCDMA and LTE).

Method for Evaluation of Outage Probability on Random Access Channel in Mobile Communication Systems

CMTOPNWTAR, Siemens Program and System Engineering, Ltd., Trieda SNP 37, 041 00 Košice, Slovakia

Journal of Electrical Engineering

In order to access the cell in all mobile communication technologies a so called random-access procedure is used. For example in GSM this is represented by...

Method for Evaluation of Outage Probability on Random Access Channel in Mobile Communication Systems

Published Online: Jun 30, 2012

Page range: 191 - 195

DOI: https://doi.org/10.2478/v10187-012-0028-4

Keywords
phantom RACH, GSM, Rayleigh-distribution, outage probability

This content is open access.

Method for Evaluation of Outage Probability on Random Access Channel in Mobile Communication Systems

Published Online: Jun 30, 2012

Page range: 191 - 195

DOI: https://doi.org/10.2478/v10187-012-0028-4

Keywordsphantom RACH, GSM, Rayleigh-distribution, outage probability

This content is open access.

Keywords
phantom RACH, GSM, Rayleigh-distribution, outage probability