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authorRefik Hadzialic2012-08-16 18:09:45 +0200
committerRefik Hadzialic2012-08-16 18:09:45 +0200
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treeeab7028c1961f749748adeeafcea875171930d28
parentGSM (diff)
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GSM Network
-rw-r--r--vorlagen/thesis/maindoc.pdfbin6908839 -> 6913815 bytes
-rw-r--r--vorlagen/thesis/src/kapitel_x.tex30
-rw-r--r--vorlagen/thesis/src/maindoc.lof18
-rw-r--r--vorlagen/thesis/src/maindoc.lot16
4 files changed, 43 insertions, 21 deletions
diff --git a/vorlagen/thesis/maindoc.pdf b/vorlagen/thesis/maindoc.pdf
index 2a77b46..2e897cc 100644
--- a/vorlagen/thesis/maindoc.pdf
+++ b/vorlagen/thesis/maindoc.pdf
Binary files differ
diff --git a/vorlagen/thesis/src/kapitel_x.tex b/vorlagen/thesis/src/kapitel_x.tex
index 2f59e75..c1755ab 100644
--- a/vorlagen/thesis/src/kapitel_x.tex
+++ b/vorlagen/thesis/src/kapitel_x.tex
@@ -1476,9 +1476,9 @@ Every TDMA frame is assigned a unique integer number which is then repeated and
every 3h:28m:53s:760ms, also known as \textit{hyperframe} \citep[Chapter 7]{0890064717}. In the hierarchy pyramid,
a layer lower of the hyperframe is the \textit{superframe}. There are two types of superframes, consisting of two types
of \textit{multiframes}, differing in their length \citep[Chapter 7]{0890064717}. The relations can be seen in figure
-\ref{img:GSMHierarchy} with their duration periods. The multiframe with 26 TDMA frames carries only traffic channels (TCH) and associated
-control channels (CCH). The other multiframe type, with 51 TDMA frames carries solely signalling data. This hierarchy constrain
-was defined due to internal synchronization and cyphering between the MS and the Base Transceiver Station (BTS)
+\ref{img:GSMHierarchy} with their duration periods. The multiframe with 26 TDMA frames carries only traffic channels and associated
+control channels. The other multiframe type, with 51 TDMA frames carries solely signalling data. This hierarchy constrain
+was defined due to internal synchronization of the GSM network and cyphering between the MS and the Base Transceiver Station (BTS)
\citep[Chapter 7]{0890064717}.
@@ -1520,7 +1520,29 @@ from 64 kbps to 16 or 8 kbps depending if it is a full or half rate channel.
The next subsystem block is the Network Switching Subsystem (NSS), as it can be seen on figure \ref{img:GSMBig}, on right
side inside of the gray dashed line rectangle. The main task of NSS is to connect the GSM with other telephony networks
(GSM networks from other providers or the Public Switched Telephone Network) \citep[Chapter 4]{0470742984}. It consists of
-Mobile Switching Center
+Mobile Switching Center (MSC), Gateway Mobile Switching Center (GMSC) and databases.
+
+MSC's main function is to route incoming and outgoing calls between the moving mobile users,
+``the assignment of user channels toward the BSS'' \citep[Chapter 4]{0890064717} \citep{konrad}. GMSC is
+a type of MSC for external networks, GSM networks from other providers or telephone networks are
+routed through the GMSC\citep[Chapter 4]{0890064717}.
+
+There are four databases: Home Location Register (HLR), Visitor Location Register (VLR), Authentication Center (AUC)
+and Equipment Identity Register (EIR). HLR database stores data about the GSM subscribers of a network provider. The data that
+can be found in HLR: the unique International Mobile Subscriber Identity (IMSI) - that is stored on the SIM card of a mobile user;
+usage statistics; subscriber's number (MSISDN) and the current location of the mobile user acquired by knowing the location
+of the BSC controlling the BTS that provides at the current moment the GSM air interface to the mobile user \citep{konrad}.
+VLR serves as a temporary data storage of important parts of HLR data (not all data known for the particular user)
+of all the visiting mobile subscribers served by the current MSC. i.e. if a MS from its home MSC enters an area covered
+by the newly entered MSC, its VLR will request some of the HLR data from the HLR database of the MSC where
+the MS is registered \citep{dennis} \citep[Chapter 4]{0470742984}. AUC contains confidential keys for each mobile subscriber
+required for encrypting the data before they are transmitted to the MS from the BTS \citep[Chapter 3]{0470030704}.
+The keys located in AUC are also required for the MS to register
+in the network \citep{konrad}. EIR is an optional database but contains data about approved types of
+mobile equipment (not stolen cell phones), black listed cell phones (they are identified by their International
+Mobile Equipment Identity number which is unique for every manufactured cell phone) and cell phones which
+ought to be tracked if they register \citep[Chapter 4]{0890064717}.
+
\newpage
\section{Logical channels and the SDCCH channel}
diff --git a/vorlagen/thesis/src/maindoc.lof b/vorlagen/thesis/src/maindoc.lof
index 9641f5e..b3dc762 100644
--- a/vorlagen/thesis/src/maindoc.lof
+++ b/vorlagen/thesis/src/maindoc.lof
@@ -29,16 +29,16 @@
\contentsline {figure}{\numberline {3.3}{\ignorespaces Hierarchy of the GSM frames.\relax }}{40}{figure.caption.31}
\contentsline {figure}{\numberline {3.4}{\ignorespaces Basic GSM network block diagram.\relax }}{42}{figure.caption.32}
\addvspace {10\p@ }
-\contentsline {figure}{\numberline {4.1}{\ignorespaces RRLP Request protocol. Assistance data can be sent before the request is made. If the assistance data are sent, their reception acknowledgement is sent as a response from the MS.\relax }}{46}{figure.caption.33}
-\contentsline {figure}{\numberline {4.2}{\ignorespaces An example RRLP request. Constructing a binary RRLP request in PER from ASN.1. Yellow zero bits are extension markers or spare bits. \relax }}{52}{figure.caption.34}
-\contentsline {figure}{\numberline {4.3}{\ignorespaces Reference location is a 14 octet stream built according to the given rule as specified in the standard \citep {3gppequations} under section \textit {7.3.6}.\relax }}{56}{figure.caption.35}
-\contentsline {figure}{\numberline {4.4}{\ignorespaces World Geodetic System 1984\relax }}{56}{figure.caption.36}
-\contentsline {figure}{\numberline {4.5}{\ignorespaces Requested AGPS assistance data to be delivered\relax }}{62}{figure.caption.41}
+\contentsline {figure}{\numberline {4.1}{\ignorespaces RRLP Request protocol. Assistance data can be sent before the request is made. If the assistance data are sent, their reception acknowledgement is sent as a response from the MS.\relax }}{48}{figure.caption.33}
+\contentsline {figure}{\numberline {4.2}{\ignorespaces An example RRLP request. Constructing a binary RRLP request in PER from ASN.1. Yellow zero bits are extension markers or spare bits. \relax }}{54}{figure.caption.34}
+\contentsline {figure}{\numberline {4.3}{\ignorespaces Reference location is a 14 octet stream built according to the given rule as specified in the standard \citep {3gppequations} under section \textit {7.3.6}.\relax }}{58}{figure.caption.35}
+\contentsline {figure}{\numberline {4.4}{\ignorespaces World Geodetic System 1984\relax }}{58}{figure.caption.36}
+\contentsline {figure}{\numberline {4.5}{\ignorespaces Requested AGPS assistance data to be delivered\relax }}{64}{figure.caption.41}
\addvspace {10\p@ }
\addvspace {10\p@ }
-\contentsline {figure}{\numberline {6.1}{\ignorespaces nanoBTS with its plastic cover. Image courtesy of ip.access ltd\relax }}{68}{figure.caption.45}
-\contentsline {figure}{\numberline {6.2}{\ignorespaces nanoBTS with two external antennas and five connection ports\relax }}{69}{figure.caption.47}
-\contentsline {figure}{\numberline {6.3}{\ignorespaces Navilock NL-402U, opened up with the antenna and USB cable\relax }}{70}{figure.caption.49}
-\contentsline {figure}{\numberline {6.4}{\ignorespaces Cable connections, showing interconnection diagram\relax }}{71}{figure.caption.50}
+\contentsline {figure}{\numberline {6.1}{\ignorespaces nanoBTS with its plastic cover. Image courtesy of ip.access ltd\relax }}{70}{figure.caption.45}
+\contentsline {figure}{\numberline {6.2}{\ignorespaces nanoBTS with two external antennas and five connection ports\relax }}{71}{figure.caption.47}
+\contentsline {figure}{\numberline {6.3}{\ignorespaces Navilock NL-402U, opened up with the antenna and USB cable\relax }}{72}{figure.caption.49}
+\contentsline {figure}{\numberline {6.4}{\ignorespaces Cable connections, showing interconnection diagram\relax }}{73}{figure.caption.50}
\addvspace {10\p@ }
\addvspace {10\p@ }
diff --git a/vorlagen/thesis/src/maindoc.lot b/vorlagen/thesis/src/maindoc.lot
index 88b7c5c..77a51da 100644
--- a/vorlagen/thesis/src/maindoc.lot
+++ b/vorlagen/thesis/src/maindoc.lot
@@ -5,15 +5,15 @@
\addvspace {10\p@ }
\contentsline {table}{\numberline {3.1}{\ignorespaces GSM operating frequencies in Germany\relax }}{38}{table.caption.28}
\addvspace {10\p@ }
-\contentsline {table}{\numberline {4.1}{\ignorespaces GPS UTC Model content\relax }}{57}{table.caption.37}
-\contentsline {table}{\numberline {4.2}{\ignorespaces Navigation message (ephemeris) content\relax }}{58}{table.caption.38}
-\contentsline {table}{\numberline {4.3}{\ignorespaces Almanac message content\relax }}{59}{table.caption.39}
-\contentsline {table}{\numberline {4.4}{\ignorespaces GPS Ionosphere Model content\relax }}{59}{table.caption.40}
-\contentsline {table}{\numberline {4.5}{\ignorespaces Requested AGPS assistance data bit meaning\relax }}{63}{table.caption.42}
+\contentsline {table}{\numberline {4.1}{\ignorespaces GPS UTC Model content\relax }}{59}{table.caption.37}
+\contentsline {table}{\numberline {4.2}{\ignorespaces Navigation message (ephemeris) content\relax }}{60}{table.caption.38}
+\contentsline {table}{\numberline {4.3}{\ignorespaces Almanac message content\relax }}{61}{table.caption.39}
+\contentsline {table}{\numberline {4.4}{\ignorespaces GPS Ionosphere Model content\relax }}{61}{table.caption.40}
+\contentsline {table}{\numberline {4.5}{\ignorespaces Requested AGPS assistance data bit meaning\relax }}{65}{table.caption.42}
\addvspace {10\p@ }
\addvspace {10\p@ }
-\contentsline {table}{\numberline {6.1}{\ignorespaces Indicator LED status on the nanoBTS\relax }}{72}{table.caption.48}
+\contentsline {table}{\numberline {6.1}{\ignorespaces Indicator LED status on the nanoBTS\relax }}{74}{table.caption.48}
\addvspace {10\p@ }
\addvspace {10\p@ }
-\contentsline {table}{\numberline {A.3.1}{\ignorespaces Example uncertainties (latitude and longitude) for various integer values of $K$\relax }}{85}{table.caption.56}
-\contentsline {table}{\numberline {A.3.2}{\ignorespaces Example uncertainties (altitude) for various integer values of $K$\relax }}{86}{table.caption.57}
+\contentsline {table}{\numberline {A.3.1}{\ignorespaces Example uncertainties (latitude and longitude) for various integer values of $K$\relax }}{87}{table.caption.56}
+\contentsline {table}{\numberline {A.3.2}{\ignorespaces Example uncertainties (altitude) for various integer values of $K$\relax }}{88}{table.caption.57}