CDMA2000 Network Configuration

CDMA2000 Network Configuration

The CDMA2000 1X/1xEV-DO networks consist of the Access Network(AN), Data Core Network(DCN), and the Voice Core Network(VCN).

Voice Core Network (VCN)

VCN is configured with Mobile Switching Center(MSC), Home Location Register(HLR), and Interworking Function(IWF). VCN processes the voice and circuit data of MS, which has been received through AN.

Mobile Switching Center (MSC)

MSC performs switching in the CDMA2000 network. MSC connects mobile subscribers in the network with subscribers in another network, and authorizes MSs in the CDMA2000 1X network. Also, MSC inter-works with various supplementary system devices to provide mobile subscribers with additional services.

Home Location Register (HLR)

HLR is a database where information on CDMA2000 mobile communication

subscribers is archived. HLR can be fault tolerant seamlessly and process database in real-time. HLR inter-works with MSC, the SMS center, network administration center, and customer center.

Interworking Function (IWF)

IWF provides mobile subscribers with circuit data communication services such as facsimile and modem communications, and has a modem pool.

Once IWF receives a request for circuit data service from a mobile subscriber or Public Switched Telephone Network(PSTN), IWF allocates resources of the modem pool to provide services.

Data Core Network (DCN)

DCN is configured with Packet Data Serving Node(PDSN), Home Agent(HA), Authorization, Authentication and Accounting(AAA), and Element Management System(EMS). DCN processes packet data on MS and sends or receives the packet data through AN.

Packet Data Serving Node (PDSN)

PDSN connects AN to DCN in the CDMA2000 1X or 1xEV-DO network. PDSN sets, maintains, or releases MS and PPP. PDSN functions as Foreign Agent(FA) for HA to provide mobile Internet Protocol(IP) services.

Home Agent (HA)

HA connects to the private network or another network in order to allow mobile IP users to connect to internet. HA exchanges data with FA(PDSN) in a variety of encryption methods.

Authorization, Authentication and Accounting (AAA)

AAA performs the authorization and authentication functions as well as billing for packet data communication service subscribers. AN-AAA performs authorization for MS, while AAA performs authorization for subscribers. PDSN and HA make a request for information on user authorization and authentication to AAA if required, and delivers the billing information to AAA periodically.

AAA supports authorization in accordance with the user profiles saved in the database.

Element Management System (EMS)

EMS supports the interface function for the DCN components. EMS performs I/O of the operator commands, displays an error/configuration/status/performance messages, restarts the system, and downloads the system software blocks.

Access Network (AN)

The AN is composed of the Base station Transceiver System(BTS), Base Station Controller(BSC), General ATM switch Network(GAN), Access Network-Authorization, Authentication and Accounting(AN-AAA ), and Data Location Register/DLR Local Manager(DLR/DLM).

The AN provides voice service through the VCN and delivers the packet data received from the Mobile Station(MS) to the DCN.

Base station Transceiver System (BTS)

BTS provides an air interface for Mobile Station(MS), and transmits or receives wireless data and signal data to or from MSs under the CDMA2000 1X/1xEV-DO standard.

BTS sends the data received from MSs to the core network through BSC, or conversely sends the data received from the core network to MSs through BSC. To serve as a wireless transceiver mentioned above, BTS manages radio resources such as FA and Walsh, schedules Radio Frequency(RF), or controls power.

The BTS of a single 1xEV-DO network is called Access Network Transceiver System (ANTS).

Base Station Controller (BSC)

BSC interfaces with several BTSs. Also, BSC interfaces with MSC to process voice and circuit data calls, and interfaces with GAN and DCN to process packet data calls.

Also, BSC inter-works with BSM to perform operation and maintenance functions in Base Station System(BSS). BSC performs vocoding for voice calls, and performs Radio Link Protocol(RLP) for data calls. BSC supports the Select and Distribute Unit(SDU) function for voice and data calls to enable soft handoff in MSs.

The BSC of a single 1xEV-DO network is called Access Network Controller(ANC).

General ATM switch Network (GAN)

GAN provides communication paths between BSCs. GAN interfaces with several BSCs to enable handoff between BSCs, and to enable BSM to communicate with BSC and BTS connected to each BSC through GAN. Also, packet data calls can be transmitted from BSC to PDSN through GAN.

Also, GAN manages subscriber mobility and session data, and provides a path between BSC and DLR/AN-AAA for the authorization of MS in 1xEV-DO.

Base Station Manager (BSM)

BSM provides an operator interface so that the operator can control or manage BSC and BTS. BSM provides commands that enable system failure/status/performance data retrieval, system configuration management, and system parameter control, which are required for the operation and maintenance of BSC or BTS. BSM operates on a conventional workstation platform, and is implemented by using Graphical User Interface(GUI), enabling the operator to check or control the system status conveniently.

Access Network-Authorization, Authentication and Accounting (AN-AAA)

The AN-AAA server authenticates the MS in the 1xEV-DO network. Once AN-AAA receives a request for authorization, AN-AAA assigns International Mobile Station Identity(IMSI) to MS based on Network Access Identifier(NAI) of MS, and manages mapping data on IMSI and NAI of MS.

Data Location Register/DLR Local Manager (DLR/DLM)

DLR, which performs mobility management for the wireless subscribers of the 1xEV-DO network, provides the terminal location information management, Unicast Access Terminal Identifier(UATI) assignment request process, International Mobile Station Identity(IMSI), session control/management of the MS, and the paging function for the MS.

DLM provides the operator interface for the DLR and provides the input/output for the operator’s commands, displays fault/configuration/status/performance messages, restarts the system, and downloads the software blocks.

CDMA2000 System

Mobile communication has expanded its service area from voice to data, evolving from the first generation analog mobile communications, to the second generation digital mobile communications and then to the third generation CDMA2000 mobile communications of today.

Especially, with the explosive growth of internet, many people have become interested in high-speed radio transmission technologies required for various multimedia services.

In order to provide these services in today’s internet environment, Samsung has developed the CDMA2000 1X/1xEV-DO system, which is a high-speed radio transmission technology based on the same frequency bandwidth(1.25 MHz) as that of previous technologies, using this technology and onsite experience to be the first to commercialize the CDMA mobile communication service in the world.

Samsung CDMA2000 1X/1xEV-DO systems support voice service, high-speed circuit data service, and high-speed packet data service. Thus, internet services such as web surfing and e-commerce, various contents-providing services such as Video On Demand(VOD) and MP3, and video services including video telephony and video conference can be supported stably and future demands for various multimedia services can be met.

Using the channels of the IS series(e.g., IS-95, IS-2000, and IS-856), the CDMA2000 1X/1xEV-DO systems support backward compatibility for the vocoding, low-speed data service, facsimile service, Short Message Service(SMS), medium-speed data service, handoff functions, which were also provided by the traditional systems.

Samsung CDMA 2000 system provides high-speed multimedia IT services that require various application services as well as voice and data services, and can also be efficiently applied to the migration of mobile communications.