Descriptor and Table of Contents (1 of 30) for 3GPP TS – Numbering, addressing and identification. Find the most up-to-date version of 3GPP TS at Engineering Nothing in this document should be construed to override 3GPP Technical Specification (TS) , which specifies the IMEI and IMEISV. The GSMA is a.
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The aim of mobility management is to track where the subscribers are, allowing calls, SMS and other mobile phone services to be delivered to them. Each base station covers a small geographical area which is part of a uniquely identified location tx. By integrating the coverage of each of these base stations, a cellular network provides a radio coverage over a much wider area.
A group of base stations is named a location area, or a routing area. The location 3gpo procedure allows a mobile device to inform the cellular network, whenever it moves from one location area to the next.
Mobiles are responsible for detecting location area codes LAC. When a mobile finds that the location area code is different from its last update, it performs another update by sending to the network, a location update request, together with its previous location, and its Temporary Mobile Subscriber Identity 3glp.
This is done to avoid unnecessary IMSI attachment procedures in case the mobile has been forced to switch off by removing the battery, for example without having a chance to notify the network with an IMSI detach and then switched on right after it has been turned off. There are several reasons why a mobile may provide updated location information to the network. Also, each mobile is required to regularly report its location at a set time interval using a periodic location update procedure.
Whenever a mobile moves from one location area to the next while not on a call, a random location update is required. This is also required of a stationary mobile that reselects coverage from a cell in a different location area, because of signal fade.
Thus, a subscriber has reliable access to the network and may be reached with a call, while enjoying the freedom of mobility within the whole coverage area. The next time the mobile performs a location update, the HLR is updated and the mobile not reachable flag is cleared. The number is local to a location area, and so it has to be updated each time the mobile moves to a new geographical area. The network can also change the TMSI of the mobile at any time. And it normally does so, in order to avoid the subscriber from being identified, and tracked by eavesdroppers on the radio interface.
This makes it 3gp; to trace which mobile is which, except briefly, when the mobile is just switched on, or when the data in the mobile becomes invalid for one reason or another.
LTE Identification II: NE and Location Identifiers | NETMANIAS
At that point, the global “international mobile subscriber identity” IMSI must be sent to the network. The IMSI is sent as rarely as possible, to avoid it being identified and tracked. A key use of the TMSI is in paging a mobile. The most important use of broadcast information is to set up channels for “paging”. Every cellular system has a broadcast mechanism to distribute such information to a 233.003 of mobiles. Roaming is one of the fundamental mobility tss procedures of all cellular networks.
Roaming is defined  as the ability for a cellular customer to automatically make and receive voice calls, send and receive data, or access other services, including home data services, when travelling outside the geographical coverage area of the home networkby means of using a visited network. This can be done by using a communication terminal or else just by using the subscriber identity in the visited network. Roaming is technically supported by a mobility management, authenticationauthorization and billing 3tpp.
A “location area” is a set 3gp base stations that are grouped together to optimise signalling. To each location area, a unique number called a “location area code” LAC is assigned. The location area code is broadcast by each base station at regular intervals. Within a location area, each base station is assigned a distinct “cell identifier” CI number, see also Cell Global Identity. If the location areas are very large, there will be many mobiles operating simultaneously, resulting in very high paging traffic, as every paging request has to be broadcast to every base station in the location area.
This wastes bandwidth and power on the mobile, by requiring it to listen for broadcast messages too much of the time.
3GPP TS (1 of 30) – Numbering, addressing and identification
If on the other hand, there are too many small location areas, the mobile must contact the network very often for changes of location, which will also drain the mobile’s battery.
A balance has therefore to be struck [ citation needed ]. The routing area is the packet-switched domain equivalent of the location area. A “routing area” is normally a subdivision of a “location 23.03. Routing areas are used by mobiles which are GPRS -attached. The bursty nature of packet traffic means that more paging messages are expected per mobile, and so it is worth knowing the location of the mobile more accurately than it would be with traditional circuit-switched traffic.
A change 3fpp routing area to routing area called a “Routing Area Update” is done in an almost identical way to a change from location area to location 23.03.
The tracking area is the LTE counterpart of the location area and routing area.
A tracking area is a set of cells. Tracking areas can be grouped into lists of tracking areas 23003 listswhich t be configured on the User Equipment UE. Tracking area updates are performed periodically or 3fpp the UE moves to a tracking area that is not included in its TA list. Operators can allocate different TA lists to different UEs. This can avoid signaling peaks in some conditions: From Wikipedia, the free encyclopedia. This article is about wireless communication.
For mobility management in public transport, see Transportation Demand Management and Transit-oriented development. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. February Learn how and when to remove this template 3tpp.
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