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Topic: SGSN

Related Topics

PDP Context

Mobile IP

Mobility management

VLR

Roaming

Data structure

IMSI

Session management

Edge

Interface

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	GPRS and IS-136 Integration for Flexible Network and Services Evolution
		SGSN takes care of terminal mobility and authentication functions, and is connected to the BSS over a frame relay network on one side and to the GGSN over an IP backbone network on the other.
		Between the SGSN and the MS, PDP data are transferred with the Subnetwork Dependence Convergence Protocol (SNDCP,) whereas between the SGSN and the GGSN, PDP data are routed and transferred with either the Transmission Control Protocol (TCP)/IP (for X.25 services) or User Datagram Protocol(UDP)/IP protocols (for IP services).
		The SGSN identifies the MSC/VLR to which to forward the message based on the routing area identity (RAI) where the MS is located, and forwards the message to the identified MSC/VLR along with the IMSI of the MS.
	www.comsoc.org /pci/private/1999/jun/Le.html (5485 words)

	Network Management
		The SGSN updates its PDP context table and confirms the activation of the new PDP context to the MS ("activate PDP context accepted").
		The GGSN updates the location directory by using routing information, which is supplied by the SGSNs, about the location of a MS and routes the external data network protocol packet (after its encapsulation) over the GPRS backbone to the SGSN which is currently serving the MS.
		The SGSN that the mobile station is registered to encapsulates the IP packets that come from the mobile station, examines the PDP context, and routes them through the intra-PLMN GPRS backbone to the appropriate GGSN.
	www2.rad.com /networks/2003/gprs/arch_mng.htm (1762 words)

	GPRS Core Network - Wikipedia, the free encyclopedia
		The SGSN is the node which in some sense carries out the same function as the Foreign Agent in Mobile IP.
		This means that the functions carried out by the SGSN vary quite considerably between GSM and UMTS.
		Between the SGSN and the external GGSN, there is the Border Gateway (which is essentially a firewall).
	en.wikipedia.org /wiki/GPRS_Core_Network (1267 words)

	GPRS Protocols Family - Telephony Cellular Protocols - BCC \| BSSAP+ \| BSSGP \| GCC \| GMM \| GSM \| GTP \| LLC \| NS \| RLP \| ...
		The behaviour of the VLR and the SGSN entities related to the Gs interface are defined by the state of the association for an MS.
		LLC spans from the MS to the SGSN and is intended for use with both acknowledged and unacknowledged data transfer.
		The SGSN side does the opposite; i.e., commands are sent with C/R set to 1 and responses are sent with C/R set to 0.
	www.protocols.com /pbook/gprsfamily.htm (3591 words)

	[No title]
		SGSN should be able to find the signalling address of the related SGSN based on the received Routing Area Identifier (RAI).
		Target SGSN should be able to retrieve the RNC signalling address based on the given RNC-ID. This association has to be known only for those RNCs that are connected to the specific SGSN.
		SGSN shall be able to retrieve the signalling addresses of other SGSNs based on their Routing Area Code.
	www.3gpp.org /ftp/tsg_sa/WG2_Arch/TSGS2_05/tempdoc/S2-99336.doc (1656 words)

	SAMSUNG's Digital World - Core Network \| SGSN (Site not responding. Last check: 2007-11-04)
		SGSN is responsible for packet switching that is responsible for packet call processing are separately configured, it is possible to gradually increase subscriber accommodation capacity and packet switching capacity.
		The SGSN is a packet switching system that guarantees reliability of the mobile communication network.
		SGSN is a large-capacity packet switching equipment capable of connecting 100,000 PDP contexts in one shelf.
	www.samsung.com /Products/WCDMA/CoreNetwork/WCDMA_CoreNetwork_SGSN.htm (339 words)

	Network Architecture
		The SGSN is the main component which enables the mobility of GPRS users.
		Most of the time, the user won't notice the delivery although the packets that were currently buffered in the old SGSN might be discarded and re-sent by using higher layers.
		The GGSN keeps track of the SGSN to which a specified MS is connected and forwards packets to it.
	www2.rad.com /networks/2003/gprs/arch_nw.htm (1707 words)

	Nokia - Nokia unveils 3G SGSN - an industry first enhancing GPRS networks for 3G - Press Releases - Press - About Nokia
		The Nokia 3G SGSN has been designed specifically to be optimized for the new levels and types of traffic in 3G - and marks an industry first for Nokia.
		With the Nokia 3G SGSN, operators not only have a dedicated platform for handling 3G packet data traffic, but also an evolution path to all-IP because the 3G SGSN works seamlessly with other mobile packet core equipment already installed in the network.
		Such high performance is achieved by designing the 3G SGSN for the exact requirements of 3G packet routing and mobility management - making the 3G SGSN built to purpose precisely for 3G.
	press.nokia.com /PR/200010/792776_5.html (606 words)

	[No title]
		To achieve this, each support node SGSN is connected to a certain part of the GSM system, typically to a mobile switching centre, but in some situations it may be preferable to connect it directly to a base station subsystem BSS, i.e.
		When the mobile station roams from one cell to another within the area of one support node SGSN, location updating is needed only in the support node SGSN, and the gateway node GGSN need not be informed of the change of location.
		When a mobile station is logged on a packet network, information on the support node SGSN in the area of which the mobile station MS is located is maintained in the IRSN node.
	www.tcs.hut.fi /~hhk/cv/pubs/WO1998032299.htm (4518 words)

	Hemant Chaskar Rajeev Koodli Nokia Research Center Nokia Research Center
		SGSN maintains the mobility context for the mobile station (MS) and also performs authentication procedures.
		SGSN is connected to the Base Station Subsystem (BSS) over a frame relay network on one side and to the GGSN over IP backbone (called core network or CN) on the other side.
		When the MS changes serving SGSN due to mobility, for downlink traffic, it is only required to change the label mapping context at GGSN that would cause the subsequent packets of the MS to be routed to new SGSN.
	www.isoc.org /isoc/conferences/inet/01/CD_proceedings/T56/MPLSDiff.htm (3436 words)

	Advanced Packet Data Testing with Linux (Site not responding. Last check: 2007-11-04)
		The SGSN activates the session, called a packet data protocol (PDP) context, with the GGSN.
		The tunnel ID (TID) is tied to that mobile's context at both the GGSN and the SGSN.
		At the SGSN, the peer LLC layer acknowledges the received packets, and the SNDCP compression and segmentation are undone.
	www.linuxjournal.com /node/3724/print (3869 words)

	3G SGSN solution from Aricent to build, test and deliver 3G solutions faster
		Targeted towards the OEMs, Aricent's 3G SGSN software solution will enable them to build, test and deliver their 3G solutions faster and at lower cost to their customers.
		The 3G SGSN integrates industry-leading interface stack solutions from Aricent, such as the GMM/SM, IuPS (RANAP, B-SS7 and SIGTRAN), MAP/SS7, BSSAP+, IPoA and GTP-C/U and GTP'.
		With this unique 3G SGSN solution, Aricent is addressing the key challenge of interoperability.
	www.hssworld.com /mobile/solutions/3g_sgsn/3g_sgsn.htm (386 words)

	Tektronix: Applications > GPRS SGSN Capacity Testing (Site not responding. Last check: 2007-11-04)
		A trend in wireless core infrastructure development is that fewer network elements (such as SGSN’s — Serving GPRS Support Node) handle more subscribers and more traffic.
		The way to verify and ensure the ability of a network element to handle large quantities of subscribers is capacity testing.
		The focus of capacity testing is to emulate the maximum number of expected subscribers with their typical signaling and service usage behavior.
	www.tek.com /Measurement/App_Notes/2F_16776/eng/index.html (69 words)

	Ericsson SGSN
		Ericsson is the leading vendor of SGSN nodes to a large numbers of commercial GSM and WCDMA networks worldwide.
		With the current SGSN R6 release, Ericsson was first to the market with a one-cabinet Dual Access solution capable of running GSM and WCDMA traffic simultaneously.
		Stability - the SGSN from Ericsson has gained a reputation among operators of providing excellent in service performance during high load in large networks.
	www.ericsson.com /products/hp/SGSN_pa.shtml (209 words)

	Adax - Application Areas
		As a result, multiple Frame Relay channels are required per SGSN for the NS.
		For vendors who also want to run SS7 for connection from the SGSN over the Gs Interface on the same card as the Frame Relay for the Gb Interface, the Adax HDC multiple protocol card can be used.
		Within the BSSAP+ stack in an SGSN, third party SCCP and MTP-3 software is integrated with the Adax MTP-2 on the HDC board.
	www.adax.com /application_areas/gprs/aa_gprs_sgsn.htm (704 words)

	Continuous Computing \| Solutions \| Serving GPRS Support Node
		The Serving GPRS Support Node (SGSN) is the node serving the Mobile Station.
		Gb - The interface between the SGSN and the BSS; this interface is Frame Relay
		Gn - The interface based on IP that is between the SGSN and the GGSN
	www.ccpu.com /solutions/sgsn.html (269 words)

	Mobile Metrics - SGSN Test System
		The Torrent 6100 SGSN Test System architecture is very similar to that of the Torrent 5100 GTS, with the most significant change being the introduction of the MTS-6100 Mobile Traffic Simulator for Gb/Iu interfaces:
		From the user's perspective, using the SGSN Test System is nearly identical to using the Torrent 5100 GTS, as so many of the features, functions, and capabilities are the same.
		The SGSN Test System is currently under development, with release planned for 4Q06.
	www.mobilemetrics.net /sgsn.htm (173 words)

	Adax - Application Areas
		The ATM card has the capability to support all of the signaling protocol stacks in the SGSN and MSC in a 3G network, and a wide variety of protocols can run simultaneously on the card.
		The Radio Access Network Application Part (RANAP) is the Radio Access layer for the Iu Interface and is found in both the SGSN and MSC.
		GTP is supported by the Ga, Gn and Gp interfaces, which interconnect the SGSN to the GGSN and charging gateways.
	www.adax.com /application_areas/3g_umts/aa_umts_sgsn_msc.htm (139 words)

	Protocol: GTP ( GPRS Tunneling Protocol )
		This allows the SGSN to activate a session on the users behalf (PDP context activation), to deactivate the same session, to adjust quality of service parameters or to update a session for a subscriber who has just arrived from another SGSN.
		In this case, RANAP is used as a control protocol and establishes GTP-U tunnels between the SGSN and the RNC.
		In the fields of packet-switched networks and computer networking, the traffic engineering term Quality of Service (QoS) refers to the probability of the telecommunication network meeting a given traffic contract, or in many cases is used informally to refer the probability of a packet succeeding in passing between two points in the network.
	www.protocolbase.net /protocols/protocol_GTP.php (2800 words)

	Flextronics Software Systems adds Video and Audio streaming over its breakthrough 3G SGSN source code - enables OEMs to ...
		The HSS 3G SGSN on the reference platform, can also be readily used by the OEMs, as an ideal entry-level solution for field trials, or for the emerging markets where the technology has not caught on and the ROI is doubtful.
		HSS' business models provide the flexibility for the OEM to replace the HSS solution with a higher end SGSN solution, once the technology is validated and the 3G-customer base has increased.
		With the HSS 3G SGSN solution, our OEM customers, can very effectively address the requirements of the Service Provider segment to support enhanced services and profitably tap the emerging markets also" said Arun Kumar, President and Managing Director, Hughes Software Systems.
	www.hssworld.com /newsroom/press_releases/2002/press_3g_sgsn_streaming.htm (587 words)

	RedOrbit - Technology - TimesTen's Real-Time Infrastructure Software Selected By NEC for Advanced New Platform for ... (Site not responding. Last check: 2007-11-04)
		The first products based on the new platform are new SGSN and GGSN (**) packet core nodes that can process the rapidly growing internet traffic for applications such as packetized voice and video, as well as new services such as on-line gaming over 3G Mobile Packet Networks.
		The NEC SGSN and GGSN are the world's first commercial products and run on an Intel-based system and a Carrier Grade Linux operating system.
		The SGSN and GGSN comprise an industry-leading switch that boosts the performance of data-intensive services while significantly reducing the cost for operators deploying 3G networks using Wideband Code-Division Multiple Access (WCDMA).
	www.redorbit.com /news/display?id=119939 (765 words)

	[No title]
		For this reason, the SGSN can be considered a key part of the infrastructure of any mobile operator looking to deploy GPRS.
		This is due to the fact that GGSN to SGSN communication occurs over the Gn interface.
		If the SGSN has an NMS connection, then appropriate ACLs (Access Control Lists) should be deployed on the routing device or firewall between the Gi and the NMS networks to restrict access to SNMP.
	packetstorm.linuxsecurity.com /advisories/atstake/a031303-2.txt (603 words)

	Nortel: Student Centre
		Once I take ownership of the SGSN, I start the integration process, which means I use the CIQ to build the configuration of the SGSN.
		This is where the configuration and redundancy of the SGSN are verified including running test calls through the node and checking billing records are created.
		Incidentally, at the start of this project, there was a flurry of emails as I introduced myself to everyone; found out who the significant customer contacts and project managers were; and established the key milestones, dependencies and responsibilities in the project on both sides of the equation, Nortel and the customer.
	www.nortel.com /prd/student_centre/grad_journal/anish6.html (1113 words)

	RedOrbit - Technology - Interphase Communications Modules Designed into One of the First AdvancedTCA-Compliant SGSNs (Site not responding. Last check: 2007-11-04)
		This service-critical mobile core network element, which provides the continuity of data communication throughout the different cells of the mobile network, was recently announced at 3GSM World Congress 2005 in Cannes, and represents one of the world's first applications of AdvancedTCA-based network equipment.
		Interphase AdvancedTCA-compliant products featured in the SGSN platform include a quad-port rear access Gigabit Ethernet PMC network interface card, an OC-3/STM-1 PTMC/PMC module, a dual-port T1/E1/J1 rear access communications controller, and a custom-designed rear transition module to support the T1/E1/J1 and Gigabit Ethernet traffic through the back of the system.
		Interphase was selected for this platform based on numerous criteria including the rapport generated by the consultative nature of the pre-sales process and the common application programming interface (API) across the Interphase product portfolio that will enable the customer to leverage these development efforts on future projects.
	www.redorbit.com /news/display?id=128635 (525 words)

	HSS Releases Complete Source Code Offering For 3G SGSN
		The 3G SGSN source code from HSS reduces the cost as well development time for building the 3G SGSN network node, while conforming to the 3GPP standards, thereby guaranteeing interoperability.
		"The HSS 3G SGSN source code allows OEMs to address the requirements of the service provider segment to support enhanced services and a number of new applications such as voice, images, music and video which will be part of the new richer user experience," said Manoranjan Mohapatra, Executive Vice President and Chief Operating Officer, HSS.
		The HSS 3G SGSN is an integrated solution designed to provide real-time traffic capability with carrier class quality of service, for new requirements and services.
	www.tmcnet.com /enews/020402c.htm (689 words)

	Application Example: Serving GPRS Support Node
		A Serving GPRS Support Node (SGSN) is responsible for the delivery of data packets from and to the mobile stations within its geographical service area.
		Its tasks include packet routing and transfer, mobility management (attach/detach and location management), logical link management, and authentication and charging functions.
		The location register of the SGSN stores location information (e.g., current cell, current VLR) and user profiles (e.g., IMSI, address(es) used in the packet data network) of all GPRS users registered with this SGSN.
	www.pt.com /applications/applications_sgsn.html (324 words)

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