KR100695220B1 - Radio access station for use in portable internet system - Google Patents

Abstract

An RAS(Radio Access Station) of a portable Internet system is provided to be capable of accessing on a front side, so that maintenance is easily conducted when a board is added or removed, therefore the extension of installations is easily performed up to 3FA/3Sector while state management and diagnosis of the RAS can be available in a remote place by using an RF(Radio Frequency) monitoring module. An RAS(122) comprises the followings. A DBPS(Digital Baseband Processing Subsystem)(210) performs a channel modulation/demodulation function and an interface with an ACR(Access Control Router). An RFPS(RF Processing Subsystem)(220) executes a signal amplification function and a function of up-converting or down-converting a baseband signal into an RF signal. A CFPS(Common Function Processing Subsystem)(230) carries out a power distribution function and state management/diagnosis functions of the RAS(122).

Description

Base station apparatus in portable internet system {Radio Access Station for Use in Portable Internet System}

1 is a block diagram showing a schematic configuration of a portable Internet system according to an embodiment of the present invention;

2 is a block diagram showing a schematic configuration of a base station apparatus according to a preferred embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

110: PSS 120: portable internet network

124: RAS 140: Content Server

210: DBPS 212: NISA

214: BPCA 216: GCGA

220: RFPS 222: DIFB

224: UPCB 226: PAU

228: RIFU 230: CFPS

232: RMDU

The present invention relates to a base station apparatus in a portable internet system. More specifically, the DBPS that performs the interface with the ACR, the channel modulation and demodulation function located in the front of the base station device, the function of up-converting or down-converting the baseband signal into an RF signal and the signal amplification function located in the front of the base station device The present invention relates to a base station apparatus including an RFPS to be performed and a CFPS positioned in front of the base station apparatus to perform state management and diagnostic functions of the base station apparatus and a power distribution function.

With the rapid development of computer, electronic and communication technologies, various wireless communication services using a wireless network have been provided. The most basic wireless communication service is a wireless voice call service that provides a voice call to a mobile terminal user wirelessly, which can provide a service regardless of time and place. In addition, while supplementing a voice call service by providing a text message, a wireless Internet service has recently emerged, which provides an Internet service to a user of a mobile communication terminal through a wireless communication network.

As a result of the development of communication technology, a service provided by a code division multiple access (CDMA) system is not only a voice service but also a multimedia communication service that transmits data such as circuit data and packet data. Is developing.

In recent years, IMT-2000 (International Mobile Telecommunication 2000), a third generation mobile communication system that has been established as a standard by ITU-R due to the development of information and communication, has been commercialized.

However, the existing mobile communication system is expensive to use the base station because of the high base station construction cost, and because the screen size of the mobile communication terminal is limited to provide high-speed wireless Internet, such as limited content available. In addition, wireless local area network (WLAN) technology has limitations in providing it as a public service due to problems such as radio wave interference and narrowness of coverage. As a result, a mobile Internet (Wibro: Wireless Broadband Internet or PI: Portable Internet) system that can use a high-speed wireless Internet service at a low price while moving has emerged.

The portable internet system can use various types of information and contents by accessing the internet in indoor and outdoor stationary environments and mobile environments of walking speed and low to medium speed using various types of portable internet terminals such as laptops, PDAs and handheld PCs. It is a service. In addition, it provides mobility of 60 km / h per hour, and has a downlink transmission speed of 24.8 Mbps, but an uplink transmission speed of 5.2 Mbps, which is an IP (Internet Protocol) based wireless data system having up and down asymmetric transmission characteristics.

In addition, the portable Internet system uses a 2.3 GHz frequency band, and draws a time division duplex (TDD) by a duplex method and a multiple access method to effectively use the allocated frequency spectrum. Orthogonal Frequency Division Multiple Access (OFDMA) is used.

However, the current mobile Internet service is provided without considering the user's mobile situation and service area properly, and it is not possible to develop a low-cost, high-efficiency, easy-to-install equipment for building a portable Internet network. There was this.

In order to solve the above problems, the present invention is located in the front of the base station apparatus, the interface with the ACR, DBPS performing channel modulation and demodulation function, located in the front of the base station apparatus up-converts or down-converts the baseband signal to an RF signal It is an object of the present invention to provide a base station apparatus including an RFPS performing a function and a signal amplifying function, and a CFPS performing a state management and diagnostic function and a power distribution function of the base station apparatus.

Accordingly, according to a first object of the present invention, a handover as a packet access router for connecting a portable Internet terminal (PSS: Personal Subscriber Station, hereinafter referred to as a 'PSS') and a packet service network through which a data service is provided through the portable Internet, is performed. An access control router (ACR), which performs a function, a packet routing function, and an Internet access function, delivers packet data from the content server providing the data service to the PSS and the content server. In a portable Internet system including an IP network for receiving and transmitting to the ACR, a base station apparatus, which processes an analog signal and a digital signal, performs an interface with the ACR, performs a channel modulation and demodulation function, and manages a counterpart, a diagnosis function, and a power supply. Performs a distribution function and upconverts or upconverts baseband signals to RF signals. Features and signal amplification the radio access station that performs that provides portable Internet system comprising a (La Radio Access Subsystem, hereinafter 'RAS' hereinafter).

According to a second object of the present invention, in a base station apparatus in a portable Internet system, DBPS (Digital Baseband Processing), which performs an interface with an access control router (ACR) and performs channel modulation and demodulation functions. Subsystem); An RF Processing Subsystem (RFPS) for performing a function of up-converting or down-converting a baseband signal into an RF signal and a signal amplifying function; And a common function processing subsystem (CFPS) for performing a state management and diagnostic function and a power distribution function of the base station device.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a block diagram showing a schematic configuration of a portable Internet system according to a preferred embodiment of the present invention.

The portable Internet system according to a preferred embodiment of the present invention includes a portable Internet terminal (PSS) 110, a portable internet network 120, a content server 140, and the like.

The PSS 110 refers to a portable terminal provided with a data service using the portable Internet network 120. The PSS 110 may include a low power RF (RF) / IF (Intermediate Frequency) module and controller function, a service characteristic, and a MAC according to a radio wave environment. Media Access Control) It performs frame variable control, handover, authentication and encryption functions. To this end, the PSS 110 has a built-in browser for accessing the Internet.

In addition, the PSS 110 may include a personal digital assistant (PDA), a hand-held PC, a notebook PC, a smart phone, and a multi-mode multiband (MM-MB). Band) terminal or the like. Here, a smart phone is a terminal that combines the advantages of a mobile communication terminal and a personal portable terminal, and refers to a terminal incorporating data communication functions such as schedule management, fax transmission and reception, which are functions of a personal portable terminal, in a mobile communication terminal. A multimode multiband terminal also incorporates a multi-modem chip that can operate in both portable Internet systems and other mobile communication systems (e.g., Code Division Multiple Access (CDMA) 2000 systems, wideband CDMA (WCDMA) systems, etc.). Speak terminal.

The portable Internet network 120 includes a radio access station (RAS) 122, an access control router (ACR) 124, a home agent ( HA: Home Agent, hereinafter referred to as 'HA' 132, authentication server (AAA: Authentication, Authorization, Accounting, hereinafter referred to as 'AAA') 134, IP network 130 and the like .

The RAS 122 is a base station apparatus of the portable Internet network 120 providing a packet data service to the PSS 110. The RAS 122 transmits data received from the ACR 124 to the PSS 110 wirelessly, and has a low power RF ( Radio Frequency (IF) / Intermediate Frequency (IF) module and controller functions, Orthogonal Frequency Division Multiple Access (OFDMA) / Time Division Duplex (TDD) packet scheduling, channel multiplexing, service characteristics and propagation It has MAC frame variable control function, 50 Mbps high-speed traffic real-time control function and handover function according to the environment. In addition, the PSS 110 and the RAS 122 have a 50 Mbps packet transmission modulation and demodulation function, a high speed packet channel coding function, a real time modem control function, and the like for data transmission.

The RAS 122 according to a preferred embodiment of the present invention processes an analog signal and a digital signal, performs an interface with the ACR 124, performs channel modulation and demodulation functions, manages the state of the RAS 122, diagnoses a function, and distributes power. It performs a function, and performs the function of up-converting or down-converting a baseband signal into an RF signal and a signal amplifying function.

In addition, the RAS 122 has a connector for connecting, installing, wiring, and maintaining the ACR 124 using Fast Ethernet and Gigabit Ethernet.

In addition, the RAS 122 has a built-in optical repeater matching module to enable an optical repeater (not shown) to be connected to the RAS 122, and to perform the status management, diagnostic function, and power distribution function of the RAS 122 remotely. RF monitoring module is built in.

The ACR 124 is a base station controller of the portable Internet network 120. The ACR 124 receives a plurality of RASs 122, and is a packet access router for connecting a RAS 122 or a packet service network with the RAS 122. Performs handover control function between the ACR 124, handover function between the ACR 124, handover function between the base station of another network (for example, CDMA 2000 network, WCDMA network, etc.) and the RAS 122, packet routing function, and Internet access function. do.

When the mobile Internet network 120 uses Mobile IP, the HA 132 performs a function of routing a packet transmitted from the outside through the Internet.

The AAA 134 works with the ACR 124 to charge the packet data used by the PSS 110 and authenticates the connection from the PSS 110.

The IP network 130 is a backbone network for transmitting and receiving data in the portable Internet network 120 and includes a plurality of network equipment such as a router. The IP network 130 according to the preferred embodiment of the present invention connects the ACR 124, the HA 132, the AAA 134, the content server 140, and the like, and an external packet such as the Internet (not shown). Packet data is received from the data service and transmitted to the ACR 124.

When the content server 140 receives a service request from the PSS 110, the content server 140 provides content using the portable Internet network 120. The content server 140 is implemented as a network server as equipment for providing a data service to the PSS 110. Network servers are computer systems and computer software that are typically connected to subordinate devices that can communicate with other network servers through a computer network, such as a private intranet or the Internet, to receive and perform work on requests for performing work, and to provide results. Server program). However, in addition to such a network server program, it should be understood as a broad concept including a series of applications running on a network server and in some cases various databases built therein. Such a network server may be implemented using a network server program that is variously provided according to an operating system such as DOS, Windows, Linux, UNIX, or Macintosh.

2 is a block diagram showing a schematic configuration of a base station apparatus according to a preferred embodiment of the present invention.

According to a preferred embodiment of the present invention, a radio access station (Radio Access Subsystem, hereinafter referred to as "RAS") 122 is a base station apparatus, which is located in front of the RAS 122 and includes an access control router (ACR). The baseband signal is located in front of the Digital Baseband Processing Subsystem (DBPS) 210 and the RAS 122 that perform an interface with the 124, a channel modulation / demodulation function, and up-convert the baseband signal to an RF signal. Commonly located on the front of the RF Processing Subsystem (RFPS) 220 and the RAS 122 that perform down-conversion and signal amplification functions, the CFPS (Common Management) performs the status management, diagnostics, and power distribution functions of the RAS 122. Function Processing Subsystem) 230.

DBPS 210 according to a preferred embodiment of the present invention is a Network Interconnection and Switching Assembly (NISA) 212 performing a network interface and switching function, a baseband signal processing and baseband signal processing for performing a control function BPCA (Baseband Signal Processing) and a GPS Receiver and Clock Generation Assembly (GCGA) 216 that receives GPS signals, extracts timing synchronization to provide a reference clock, and supplies an RF switch control signal.

In detail, the NISA 212 performs an L3 switching function for enabling IP communication between the RAS 122 and the ACR 124 and converts a plurality of Ethernet cables into one optical cable. Performs the Ethernet_to_Gigabit Switch) function. In addition, the NISA 212 includes an optical transceiver to support an optical interface, and has a port for enabling a serial connection between a plurality of base station devices. In addition, the NISA 212 supports a solid line alarm aggregation function and a redundancy function of the RAS 122.

In detail, the GCGA 216 provides a 5 ms frame synchronization signal, which is basically required for the synchronization setting of the RAS 122, a reference signal for ensuring the frequency accuracy of the RF block, and a clock signal for digital signal processing. to provide. In addition, the GCGA 216 performs a solid state alarm providing function to the NISA 212.

RFPS 220 according to an embodiment of the present invention is a digital IF board (DIFB) Digital Intermediate Frequency Board (DIFB) 222, UPCB (UP Converter Block (UPCB) that performs the function of converting and amplifying a digital IF signal to an RF signal ( 224, a power amplifier unit (PAU) 226 that interfaces with the RIFU 228 to amplify and transmits a transmission signal, and a radio frequency (RF) / intermediate frequency (IF) signal converter. RIFU (RF / IF Converter and Front_end Unit) 228 to perform.

In detail, the RIFU 228 performs a function of upconverting or downconverting a baseband signal into an RF signal, a function of upconverting or downconverting a digital signal into an analog signal, and filtering a plurality of signals. RIFU 228 also displays the state of RAS 122 via LEDs on the front panel.

CFPS 230 according to a preferred embodiment of the present invention includes a RAS Maintenance and Diagnostic Unit (RMDU) 232 that performs the status management and diagnostic functions of the RAS (122).

In detail, the RMDU 232 performs a function of integrating a base station monitoring device and a debug port. In the case of the base station monitoring device function, a standing wave ratio (indicator representing an amount of reflection of energy input into a base station output monitoring function or a circuit or a system) VSWR: Voltage Standing Wave Ratio (VSWR) monitoring and base station transmit / receive call setup status monitoring through test call setup.In the case of integrated debug port, the debug ports that exist for each component on the front panel of the base station component 232), and through the RMDU (232) to check the status of the base station components.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, by providing a base station apparatus with front access, it is easy to add and remove boards, so that it is easy to add up to 3FA / 3Sector, and the base station can be remotely installed using an RF monitoring module. The status management and diagnosis of the device is enabled, thereby maintaining the system's maintenance and diagnostic operation.

Claims (22)

Handheld Internet terminal (PSS: Personal Subscriber Station, hereinafter referred to as 'PSS'), a packet access router that connects a packet service network, performs handover, packet routing, and Internet access functions. An access control router (ACR), a content server providing the data service to the PSS, and an IP network receiving packet data from the content server and transmitting the packet data to the ACR. In the portable internet system, A base station apparatus, which processes analog signals and digital signals, performs interface with the ACR, performs channel modulation and demodulation functions, performs relative management, diagnostic functions, and power distribution functions, and converts baseband signals into RF signals or upstreams them. Radio Access Station (hereinafter referred to as RAS) that performs the function of converting and amplifying the signal Mobile Internet system comprising a. The method of claim 1, The RAS is connected to the ACR using Fast Ethernet and Gigabit Ethernet. The method of claim 1, The RAS is a portable Internet system, characterized in that it has a connector (Connector) in the front for installation, wiring and maintenance. The method of claim 1, The RAS is a portable Internet system, it characterized in that the optical repeater built-in module can be connected to the optical repeater. The method of claim 1, The RAS is a portable Internet system, characterized in that the built-in RF monitoring module for performing the state management, diagnostics and power distribution function of the RAS. A base station apparatus in a portable internet system, A digital baseband processing subsystem (DBPS) for performing an interface with an access control router (ACR), and channel modulation / demodulation function; An RF Processing Subsystem (RFPS) for performing a function of up-converting or down-converting a baseband signal into an RF signal and a signal amplifying function; And Common Function Processing Subsystem (CFPS) that performs state management, diagnostics and power distribution functions of the base station apparatus Base station apparatus in a portable Internet system, comprising a. The method of claim 6, And the DBPS, the RFPS, and the CFPS are located in front of the base station apparatus. The method of claim 6, The DBPS, Network Interconnection and Switching Assembly (NISA) to perform network interface and switching functions; A baseband signal processing and control assembly (BPCA) for processing the baseband signal and performing a control function; And GPS Receiver and Clock Generation Assembly (GCGA) that receives GPS signals, extracts timing synchronization, provides a reference clock, and supplies RF switch control signals Base station apparatus in a portable Internet system, comprising a. The method of claim 8, The NISA performs a L3 switching function to enable IP communication between the base station apparatus and the ACR base station apparatus in a portable Internet system. The method of claim 8, The NISA performs an Ethernet_to_Gigabit Switch function that converts a plurality of Ethernet cables into a single optical cable. The method of claim 8, The NISA is a base station device in a portable Internet system, characterized in that it comprises an optical transceiver (Optic Transceiver) for supporting an optical interface (Optic Interface). The method of claim 8, The NISA is a base station device in a portable Internet system, characterized in that it has a port for enabling a serial connection between a plurality of base station devices. The method of claim 8, The NISA is a base station device in a portable Internet system, characterized in that for supporting the solid-state alarm collection and duplication function of the base station device. The method of claim 8, The GCGA provides a 5 ms frame synchronization signal for synchronization setting of the base station device, a reference signal for ensuring frequency accuracy of an RF block, and a clock signal for digital signal processing. . The method of claim 8, The GCGA is a base station device in a mobile Internet system, characterized in that for performing a solid line alarm providing function to the NISA. The method of claim 6, The RFPS, Digital Intermediate Frequency Board (DIFB), which is a digital IF board; An UPCB (UP Converter Block) for converting and amplifying a digital IF signal into an RF signal; A RI / IF Converter and Front End Unit (RIFU) including an RF / IF signal converter and performing a preprocessing function; And PAU (Power Amplifier Unit) that interfaces with the RIFU to amplify and transmit a transmission signal Base station apparatus in a portable Internet system, comprising a. The method of claim 16, The RIFU performs a function of upconverting or downconverting a baseband signal into an RF signal, a function of upconverting or downconverting a digital signal into an analog signal, and filtering a plurality of signals in a portable Internet system. Base station apparatus. The method of claim 16, The RIFU is a base station apparatus in a portable Internet system, characterized in that for displaying the state of the base station apparatus through the LED of the front panel. The method of claim 6, The CFPS, RAS Maintenance and Diagnostic Unit (RMDU) for performing the state management and diagnostic functions of the base station apparatus Base station apparatus in a portable Internet system, comprising a. The method of claim 19, The RMDU performs a base station monitoring device function and a debug port integration function. The method of claim 20, The base station monitoring device functions include a base station output monitoring function, a voltage standing wave ratio (VSWR) monitoring function that is an indicator of the amount of reflection of energy input to a circuit or a system, and a base station transmission / reception call setting state monitoring function through test call setup. A base station apparatus in a portable internet system, characterized in that it comprises a. The method of claim 20, In the portable Internet system, the debug port integration function integrates a debug port existing for each component on the front panel of a base station component into the RMDU, and checks the state of the base station component through the RMDU. Base station apparatus.

Images