تمامی مطالب مطابق قوانین جمهوری اسلامی ایران میباشد.درصورت مغایرت از گزارش پست استفاده کنید.

جستجو

کانال خرید و فروش پرنده

Overview of GPRS and UMTS

    Common applications of GPRS include the following: Internet access, intranet/corporate access, instant messaging, and mutlimedia messaging. The CDMA technology offers higher throughput, real-time services, and end-to-end quality of service (QoS), and delivers pictures, graphics, video communications, and other multimedia information as well as voice and data to mobile wireless subscribers. In a 3G environment, the RAN is made up of mobile stations that connect to NodeB, which connects to a radio network controller (RNC). GPRS is a 2. On the Cisco MWAM installed in a Catalyst 6500 series switch / Cisco 7600 series Internet router platform, IPSec encryption is performed on the IPSec Virtual Private Network (VPN) Acceleration Services Module. A virtual template is a logical interface that is not tied directly to a specific interface, but that can be associated dynamically with a interface. GTP is carried over IP. When an MS is permitted access to the GGSN as defined by a traditional IP access list, the IP access group further defines whether access is permitted to the PDN (at the access point). The GGSN can use a RADIUS server to authorize and authenticate remote users. The SGSN sends data to and receives data from mobile stations, and maintains information about the location of a mobile station (MS). GSM is a digital cellular technology that is used worldwide, predominantly in Europe and Asia. For more detailed information on access-point configuration, refer to the “Configuring Access Points on the GGSN” section on page 1-10.

    GPRS and UMTS are evolutions of the global system for mobile communication (GSM) networks. Figure 1-3 shows the interfaces that are implemented in the Cisco IOS GGSN feature: • Gn interface—Interface between GSNs within the same public land mobile network (PLMN) in a GPRS/UMTS network. In Cisco IOS Release 12. GPRS Interface Reference Model The 2. The access-point list contains one or more access points.5G mobile communications technology that enables mobile wireless service providers to offer their mobile subscribers packet-based data services over GSM networks. • Gi interface—Reference point between a GPRS/UMTS network and an external packet data network.0 and later provides both the 2.5G SGSN – 2. GSM is the world’s leading standard in digital wireless communications.

    Virtual Template Interface To facilitate configuration of connections between the GGSN and SGSN, and the GGSN and PDNs, the Cisco IOS GGSN software uses an internal interface called a virtual template interface. In addition to the above, the 3G UMTS technology includes the following: • Enhanced data rates of approximately – 144 kbps—Satellite and rural outdoor – 384 kbps—Urban outdoor – 2048 kbps—Indoor and low-range outdoor • Supports connection-oriented Radio Access Bearers with specified QoS, enabling end-to-end QoS

     

    GGSN Release 5.5G to 2. The IP access group configuration can also define whether access from a PDN to an MS is permitted. • Access point list—Logical interface that is associated with the virtual template of the GGSN. As with a physical interface on a router, you can assign an IP address to the virtual template interface. GTP is a protocol defined on the Gn interface between GSNs in a GPRS/UMTS network.5G and 3G GGSN that provides the following features: • Release 99 (R99), Release 98 (R98) and Release 97 (R97) support and compliance • GTPv0 and GTPv1 messaging • IP Packet Data Protocol (PDP) and PPP PDP types • Cisco Express Forwarding (CEF) switching for GTPv0 and GTPv1, and for IP and PPP PDP types • Support of secondary PDP contexts for GTPv1 (up to 11) • Virtual APN • VRF support per APN • Multiple APNs per VRF • VPN support – Generic routing encapsulation (GRE) tunneling – Layer 2 Tunneling Protocol (L2TP) extension for PPP PDP type – PPP Regeneration for IP PDP type – 802. These interfaces are commonly referred to in descriptions of GPRS/UMTS networks.

    To assign mobile sessions an IP address, the GGSN uses the Dynamic Host Configuration Protocol (DHCP), Remote Authentication Dial-In User Service (RADIUS) server, or a local address pool defined specified for an access point configured on the GGSN.5G SGSN • Charging – Time trigger – Charging profiles – Tertiary charging gateway – Switchback to primary charging gateway • Maintenance mode • Multiple trusted PLMN IDs • GGSN-IOS SLB messaging • Session timeout

    .0 and later is a fully-compliant 2. Benefits The 2.

    Access Points The GPRS/UMTS standards define a network identity called an access point name (APN).5G and 3G SGSNs with registration authority (RA) update from – 2. To configure APNs, the Cisco IOS GGSN software uses the following configuration elements: • Access point—Defines an APN and its associated access characteristics, including security and method of dynamic addressing. SGSN support is available from Cisco partners or other vendors.1(5)T and later, the GGSN on the Cisco 7200 series router (with an Integrated Services Adapter [ISA] card) supports IP Security (IPSec) protocol to provide data confidentiality, data integrity, and data authentication between participating peers. You can also configure IP routing characteristics on the virtual template interface.5G GPRS and 3G UMTS standards use the term interface to label (or identify) the communication path between different network elements. The GPRS/UMTS packet core comprises two major network elements: • Gateway GPRS support node (GGSN)—a gateway that provides mobile cell phone users access to a public data network (PDN) or specified private IP networks. UMTS is a 3G mobile communications technology that provides wideband code division multiple access (CDMA) radio technology. The SGSN communicates directly with the MS and the GGSN. Multiple SGSNs and GGSNs within a network are referred to collectively as GPRS support nodes (GSNs).5G environment, the RAN is composed of mobile stations that connect to a base transceiver station (BTS) that connects to a base station controller (BSC).1Q virtual LANs (VLANs) • Security features – Duplicate IP address protection – PLMN range checking – Blocking of Foreign Mobiles – Anti-spoofing – Mobile-to-mobile redirection • Quality of service (QoS) – Support of UMTS classes and interworking with differentiated services (DiffServ) – Delay QoS – Canonical QoS – GPRS QoS (R97/R98) conversion to UMTS QoS (R99) and the reverse – Call Admission Control – Per-PDP policing • Dynamic address allocation – External DHCP server – External RADIUS server – Local pools • Per-APN statistics • Anonymous access • RADIUS authentication and accounting • Accounting – Wait accounting – Per-PDP accounting.5G applications, and GTP Version 1 (GTP V1) for 3G applications.5G GPRS and 3G UMTS GGSN functions. The GPRS/UMTS standards define the requirements and characteristics of communication between different GPRS/UMTS network elements over these interfaces.

    In a 2. The connection between the SGSN and the GGSN is enabled through a tunneling protocol called the GPRS tunneling protocol (GTP): GTP Version 0 (GTP V0) for 2. DHCP and RADIUS services can be specified either at the global configuration level or for each access point configured on the GGSN.5G GPRS technology provides the following benefits: • Enables the use of a packet-based air interface over the existing circuit-switched GSM network, which allows greater efficiency in the radio spectrum because the radio bandwidth is used only when packets are sent or received • Supports minimal upgrades to the existing GSM network infrastructure for network service providers who want to add GPRS services on top of GSM, which is currently widely deployed • Supports enhanced data rates in comparison to the traditional circuit-switched GSM data service • Supports larger message lengths than Short Message Service (SMS) • Supports a wide range of access to data networks and services, including VPN/Internet service provider (ISP) corporate site access and Wireless Application Protocol (WAP). The RAN connects to the GPRS/UMTS core through an SGSN, which tunnels user sessions to a GGSN that acts as a gateway to the services networks (for example, the Internet and intranet). You are required to configure certain GPRS/UMTS-specific elements on the virtual template interface, such as GTP encapsulation (which is necessary for communicating with the SGSN) and the access list that the GGSN uses to determine which PDNs are accessible on the network. UMTS is standardized by the 3GPP.– Authentication and accounting using RADIUS server groups mapped to APNs – 3GPP vendor-specific attributes (VSAs) for IP PDP type – Transparent mode accounting – Class attribute – Interim updates – Session idle timer – Packet of Disconnect (PoD) • Dynamic Echo Timer • GGSN interworking between 2. An APN identifies the service or network to which a user can connect from a GGSN in a GPRS/UMTS network. The GGSN function is implemented via Cisco IOS software on the Cisco 7200 series router or on the Cisco Multi-Processor WAN Application Module (MWAM) installed in a Catalyst 6500 series switch or Cisco 7600 series Internet router. • Access group—An additional level of security that is configured at an access point to control access to and from a PDN. Cisco IOS GGSN Release 4. • Ga interface—Interface between a GGSN and charging gateway (CG) in a GPRS/UMTS network.

    Serving GPRS support node (SGSN)—connects the radio access network (RAN) to the GPRS/UMTS core and tunnels user sessions to the GGSN.5G to 3G SGSN – 3G to 3G SGSN – 3G to 2. GPRS was standardized by the European Telecommunications Standards Institute (ETSI), but today is standardized by the Third Generation Partnership Program (3GPP)
    این مطلب تا کنون 77 بار بازدید شده است.
    ارسال شده در تاریخ پنجشنبه 12 فروردين 1395 [ گزارش پست ]

    منبع
    برچسب ها :

    , , , , , , , , , , , , , , ,

آمار امروز پنجشنبه 23 آذر 1396

  • تعداد وبلاگ :55489
  • تعداد مطالب :185730
  • بازدید امروز :224232
  • بازدید داخلی :14189
  • کاربران حاضر :176
  • رباتهای جستجوگر:126
  • همه حاضرین :302

تگ های برتر امروز

تگ های برتر