KR100411881B1 - RNC interface apparatus of wireless communication system RTS - Google Patents

Abstract

The present invention relates to a control station matching device of a base station in a wireless communication system, and provides a service platform that facilitates the introduction of new services for various services in system design, and provides a high-speed real-time traffic transmission that satisfies the functions of various services. In order to provide a physical communication path between the base station and the control station, the base station is matched with a global router in the base station transceiver (BT), and a line matching module (LIU) such as an STM-1 and an E1 trunk for control station matching. And a reference clock for the system clock generation / distribution (CKGD) in the base station through the line matching module (LIU). Synchronously, load sharing for reliability, and control of traffic such as control, voice and video Depending on the nature, it accepts AAL2 / AAL5 type inter-conversion and bypass functions, and ultimately provides a physical communication path between the base station and the control station, and as a redundant control channel, through the HDLC protocol communication path. The control information is transmitted, and the communication with the base station control processor uses the IPC protocol.

Description

Control station matching device of base station in wireless communication system {RNC interface apparatus of wireless communication system RTS}

The present invention relates to a control station matching device of a base station in a wireless communication system, and in particular, asynchronous mobile communication system based on a next generation mobile communication network (UTRAN: UTMS Terrestrial) such as International Mobile Telecommunication (IMT-2000), Universal Mobile Telecommunications System (UMTS), etc. The present invention relates to a control station (RNC) matching device of a Node-B for supporting a multimedia service and a subscriber roaming service in a Radio Access Network.

The next generation mobile communication system such as IMT-2000, UMTS, etc., which is the 3rd generation mobile communication that allows users to send and receive any type of information anytime, anywhere, anyone, in the age of mobile communication in today's mobile communication The improved wireless access to provide a variety of services to different subscribers under various mobile environments.

However, in the current mobile communication method, only voice-oriented services are available, and multimedia communication services such as packet communication, data, and video cannot be accommodated, and the control station matching device of the conventional asynchronous base station (Node-B) It was not considered in the ATM matching unit according to ATM Adaptation Layer 2 (AAL2) and AAL5 type of ATM cells and frames, so that matching with an asynchronous control station (RNC: Radio Network Controller) was not possible.

Therefore, in the current technical field, it is possible to provide a multimedia service such as data and video having a transmission speed of low speed voice to 2 Mbps in a next generation mobile communication system and an international roaming service for mobile subscribers anywhere in the world. A solution is indispensable.

The present invention has been proposed to meet the above-described needs, and in particular, a control station (RNC) matching device of a base station (Node-B) for supporting a multimedia service and a subscriber roaming service in an asynchronous mobile communication system (UTRAN). The purpose is to provide.

1 is an exemplary configuration diagram of a wireless communication system to which the present invention is applied.

2 is a detailed configuration example of the asynchronous base station (Node-B) of FIG.

Figure 3 is a detailed configuration diagram of an embodiment of a base station matching device according to the present invention.

* Explanation of symbols for the main parts of the drawings

10: mobile station (UE) 20: radio access network (RAN)

30: base station (Node-B) 40: control station (RNC)

50: Core Network (CN)

The present invention for achieving the above object is a control station matching apparatus in a base station, comprising: router matching means for router matching in a base station transceiver; The high speed traffic is exchanged with the router matching means, and during the processing of voice and video traffic, ATM (ATM) traffic of AAL (ATM Adaptation Layer) 2 type from the control station is converted into AAL5 type ATM traffic and AAL 5 AAL2 / 5 type converting means for converting the type traffic into the AAL2 type traffic and bypassing the AAL5 type ATM traffic in the upload and download directions during the control traffic processing; Control station matching means for exchanging high-speed traffic with the AAL2 / 5 type converting means and for matching control stations; Control information transfer means for transferring control information to the base station control processor in the base transceiver station through a redundant control channel when a failure occurs in the ATM matching path of the router matching means, the AAL2 / 5 type conversion means, and the router; Control means for checking and operating a state of each module of the control station matching device, and accessing and storing a channel in the AAL2 / 5 form converting means to open and close a channel during a call processing; Frame dividing / recombining means for dividing and recombining an AAL5 frame to perform ATM transmission between the control means and the base station control processor; And receiving a reference clock for the network synchronizer received from the control station through the control station matching means, and transmitting a reference clock to a clock generation / distribution unit, and receiving a reference clock generated in synchronization with the system from the clock generation / distribution unit. And a clock providing means for providing to the control station matching means so as to be used for synchronization between the link of the control station and the base station when traffic is transmitted from the control station matching means.

The present invention provides a service platform that facilitates the introduction of new services to various services in the design of the next-generation mobile communication system, and for high-speed real-time traffic transmission that meets the functions of the various services, the base station (Node-B) In order to provide a physical communication path between an internal station and a control station (RNC), a base station (Node-B) is matched with a global router interface (BT) within a base station transceiver (BT) and a control station (RNC). ) It accepts Line Interface Modules (LIUs) such as STM-1 and E1 trunks for matching, and receives clocks for network synchronizer from control station (RNC) through this Line Matching Module (LIU). -B) Sends a reference clock to the system clock generation / distribution (CKGD) unit to achieve synchronization with the clocks of the systems in the base station (Node-B), and is a load share type for reliability. AAL2 / AAL5 type inter-conversion and bypass (By-pass) functions depending on the nature of traffic such as control, voice and video, and ultimately, the base station (Node-B) and the control station (RNC). ) Provides physical communication paths between the communication paths, and transfers control information through a high-level Data Link Control (HDLC) protocol communication path as a redundant control channel, and communication with a base station control processor uses an Inter Processor Communication (IPC) protocol. .

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exemplary configuration diagram of a wireless communication system to which the present invention is applied, and shows an asynchronous mobile communication system (UTRAN), and the asynchronous mobile communication system (UTRAN) includes a mobile station (UE) 10 and an asynchronous wireless access network (RAN) ( 20) and a wireless communication core network (for example, GSM-MAP core network) 50 is organically connected.

Asynchronous mobile communication system (UTRAN) is composed of a plurality of asynchronous radio access network (RAN) 20 connected to the wireless communication core network 50 through the Iu interface.

In Fig. 1, " Iu " is an interface between the radio communication core network 50 and an asynchronous radio access network (RAN) 20, and " Iur " is a control station of the asynchronous radio access network (RAN) 20. RNC: logical interface between Radio Network Controller (40) 40, and " Iub " represents an interface between control station (RNC) 40 and base station (Node-B) 30, respectively. On the other hand, "Uu" represents an air interface between an asynchronous radio access network (RAN) 20 and a user equipment (UE) 10. Here, a base station (Node-B) 30 is a logical node responsible for radio transmission and reception from or to a mobile station (UE) 10 in one or more cells.

An asynchronous radio access network (RAN) 20 consists of a control station (RNC) 40 and a base station (Node-B) 30, each base station (Node-B) 30 is one or more cells (Cell) Is connected to the control station (RNC) 40 through the Iub interface.

The control station (RNC) 40 performs the combination / splitting function during the handover between the base stations (Node-B) 30, and the combination / splitting in the case of the inter-cell handover in the same base station (Node-B) 30. The function may be performed by the control station (RNC) 40 or may be performed by the base station (Node-B) 30.

The mobile station (UE) 10 has subscriber identification, authentication algorithm implementation, authentication and password storage, and subscriber information required for the terminal. That is, the mobile station (UE) 10 includes an AMR voice service function, a 384kbps 3G-324 / M video service function, a 144kbps fast packet service function, a W-CDMA modulation and demodulation function, a USIM function, a layer 2, a layer 3 protocol function, a base station ( Node-B) 30 performs a wireless matching function, a performance analysis device access function, a handset and an MMI function.

The base station (Node-B) 30 performs Layer 1 processing functions and radio resource management operations, which are air interfaces such as channel coding, interleaving, speed matching, spreading, and the like. That is, the base station (Node-B) 30 is a radio access termination function through the W-CDMA transmission and reception method for the voice, video, and data traffic with the mobile station (UE) according to the IMT-2000 / 3GPP radio access standard , Multi-FA and multi-sector acceptance structure (2FA / 3sector implementation) and soft-receive antenna through soft-handover to receive and transmit information to and from mobile station (UE) 10 wirelessly, ATM-based for wired sections It performs a wired / wireless channel matching function, a voice and video call processing function, etc. between the mobile station (UE) 100 and the control station (RNC) 40 through traffic processing.

The control station (RNC) 40 is a network element for radio resource control of the radio access network (RAN) 20, and is a core network (CN) capable of providing a base station (Node-B) 30 and packet-based IMT-2000 services. It is connected to 50. That is, the control station (RNC) 40 includes wired and wireless channel management (Resource management), mobile station (UE) 10 protocol matching, base station (Node-B) 30 protocol matching and control, call processing function, soft handover Processing, core 50 (CN) protocol matching functions, and so on.

The core network (CN) 50 implements the UMTS / GPRS service and the Mobile Internet Protocol (Mobile IP) service for the Internet access service capable of providing packet-based services, and the core network backbone becomes the IP network and the public data network (Public). It performs the function of interworking with Data Network) and Private Data Network.

On the Iub interface between the base station (Node-B) 30 and the control station (RNC) 40, a transmission method performs transmission and reception to ATM cells of AAL2 and AAL5 types according to traffic, such as control, voice, and video.

FIG. 2 is a detailed configuration example of the asynchronous base station Node-B of FIG. 1, where "31" is a base station transceiver (BT) and "32" is a control station matching unit (according to the present invention). A control station matching device, an RNC Interface Block, and "33" each represent a Clock Gegeration Distribution (CKGD) block.

The asynchronous base station (Node-B) 30 may be composed of a base station transceiver (BT) 31, a control station matching unit 32, a block unit, and a system clock generation / distribution (CKGD) unit 33. The transceiver 31 accommodates a transmit / receive antenna, performs radio frequency (RF) front end and intermediate frequency (IF) signal up / down conversion functions, performs baseband modulation and demodulation signal processing. It performs functions such as call processing and maintenance in the base station (Node-B) 30.

The communication protocol between the control station matching unit 32 and the base station transceiver 31 is a communication between processors by selectively applying a transmission control protocol / Internet protocol (TCP (UDP) / IP) or an ATM transmission method through Ethernet. (IPC: Inter Processor Communication) protocol is used.

The control station (RNC) 40 and the base station (Node-B) 30 both operate in a receive dependent method of restoring a clock from a higher network. The control station matching unit 32 is synchronized with the control station 40 to perform a function of generating / distributing a clock required for the base station 30 by synchronizing the phase of the clock recovered from the clock 40 with the self-generated clock. The system clock is provided to the clock generation / distribution unit 33 as a reference clock.

3 is a detailed configuration diagram of an embodiment of a base station matching device according to the present invention, in which "321" is a Router Interface (RI) module and "322" is AAL2 / 5 type conversion (ATC: AAL2 / 5). Type Conversion module, "323" is a high-level data link control (HDLC) module, "324" is a CPU module, "325" is a segment reassembly (SAR) module, and "326" is a line interface unit module. And "327" represent a clock (CLK) clock module, respectively.

As shown in FIG. 3, the control station matching unit 32, which is a control station matching device in the base station according to the present invention, includes a router matching module 321 for router matching in the base station transceiver 31, and a router matching module. 321 exchanges high-speed traffic, converts AAL2 type ATM traffic from control station 40 into AAL5 type ATM traffic and converts AAL5 type traffic to AAL2 type traffic during voice and video traffic processing. And exchanges high-speed traffic with the AAL2 / 5 shape conversion module 322 and AAL2 / 5 shape conversion module 322 which bypasses the AAL5 type ATM traffic in the upload and download directions in the control traffic processing. The line matching module 326 for matching the control station 40, the router matching module 321 and the AAL2 / 5 shape conversion module 322, and in case of failure of the ATM path of the router, through the redundant control channel (b). In base station transceiver 31 The HDLC module 323, which transmits control information to the base station control processor, and the state of each module of the control station matching unit 32 are checked and operated, and the storage device in the AAL2 / 5 type conversion module 322 is processed during call processing. A CPU module 324 for accessing to open and close a channel, and a SAR module 325 for dividing and recombining an AAL5 frame to perform an ATM transmission method between the CPU module 324 and the base station control processor in the base station transceiver 31. And a network clock received from the control station 40 through the line matching module 326 to transmit a reference clock to the clock generator / distributor 33, and the system from the clock generator / distributor 33. A clock module 327 which receives the reference clock generated in synchronization with the control unit and provides the reference clock to the line matching module 326 so that the line matching module 326 can be used for synchronization between the link between the control station 40 and the base station during traffic transmission. ).

Each module in the control station matching unit 32, which is the control station matching device according to the present invention having the above configuration, will be described in detail as follows.

The router matching module 321 is a module for matching with a global router in the base station transceiver 31. The path a with the base station transceiver 31 implements a UTOPIA interface or a cell-bus system. Use the appropriate path for transmitting the cell.

The AAL2 / 5 type conversion module 322 converts AAL2 type ATM traffic from the control station 40 into AAL5 type ATM traffic for voice and video traffic, and transfers the AAL2 type ATM traffic to the base station. The AAL2 traffic is converted into AAL2 traffic and transmitted to the control station 40. The control traffic is a module for bypassing AAL5 type ATM traffic in the upload and download directions. Can be implemented.

The path f between the AAL2 / 5 shape conversion module 322 and the router matching module 221, the AAL2 / 5 shape conversion module 322 and the line matching module 326, the SAR module 325, and the line matching. The path g between modules 326 applies the UTOPIA interface scheme to enable high speed traffic exchange.

The HDLC module 323 is a module for transferring control information to the base station control processor in the base transceiver station 31 through the HDLC protocol communication path (b) as a redundant control channel. That is, the HDLC module 323 communicates with the HDLC protocol as a redundancy control channel when the router matching module 321, the AAL2 / 5 type conversion module 322, or the ATM path of the router in the counterpart base station transceiver 31 fails. The control information is transmitted to the base station control processor of the base station transceiver 31 via the path b.

The CPU module 324 is a module that checks and operates the state of each module, and performs message processing for opening and closing channels by accessing a storage device such as CAM or DPRAM in the AAL2 / 5 type conversion module 322 during call processing. .

The SAR module 325 performs a segmentation and reassembly function of the AAL5 frame to perform ATM transmission between the CPU module 324 and the base station control processor in the base station transceiver 31. 326 provides a physical communication path (c) with the ultimate control station 40, such as an E1 link or an STM-1 link, using AAL2 and AAL5 type ATM traffic to provide multimedia services at high speed when matching E1 trunks. It includes an ATM Inverse multiplexer function that transmits one high-speed data stream over multiple low-speed E1 matching links using an efficient ATM demultiplexer to provide, and also provides PBA 1 for matching with the control station 40. It has ATM 16E1 connection function per unit, and considering the AAL2 / AAL5 interconversion processing capacity, it is configured to operate up to 4 when the number of allocated channels is 700 CDMA channel / LIU PBA. CLK module 327 The matching module 326 receives the clock for the network synchronizer received from the control station 40 and transmits a reference clock to the system clock generation / distribution unit 33 through the clock transmission / reception path d. The system clock generation / minute The reference clock generated in synchronization with the system from the allocation 33 is again received by the CLK module 327 and used for inter-link synchronization between the control station 40 and the base station at the time of traffic transmission in the line matching module 326.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

In the present invention as described above, the system clock of the base station can synchronize the system clock with the higher network in a receiving dependent method of restoring the clock from the higher network without relying only on the GPS receiver. By using the network, it is effective to provide a multimedia service such as data, video and other mobile roaming service anywhere in the world to mobile subscribers having a transmission speed of up to 2Mbps.

Claims (4)

In the control station matching device in the base station, Router matching means for router matching in a base station transceiver; The high speed traffic is exchanged with the router matching means, and during the processing of voice and video traffic, ATM (ATM) traffic of AAL (ATM Adaptation Layer) 2 type from the control station is converted into AAL5 type ATM traffic and AAL 5 AAL2 / 5 type converting means for converting the type traffic into the AAL2 type traffic and bypassing the AAL5 type ATM traffic in the upload and download directions during the control traffic processing; Control station matching means for exchanging high-speed traffic with the AAL2 / 5 type converting means and for matching control stations; Control information transfer means for transferring control information to the base station control processor in the base transceiver station through a redundant control channel when a failure occurs in the ATM matching path of the router matching means, the AAL2 / 5 type conversion means, and the router; Control means for checking and operating a state of each module of the control station matching device, and accessing and storing a channel in the AAL2 / 5 form converting means to open and close a channel during a call processing; Frame dividing / recombining means for dividing and recombining an AAL5 frame to perform ATM transmission between the control means and the base station control processor; And Receives the reference clock for the network synchronizer received from the control station through the control station matching means and transmits a reference clock to the clock generation / distribution unit, and receives the reference clock generated in synchronization with the system from the clock generation / distribution unit. A clock providing means provided to a station matching means to be used for synchronization between links of the control station and the base station when transmitting traffic from the control station matching means. Control station matching device of the base station in a wireless communication system comprising a. The method of claim 1, The communication path between the router matching means and the AAL2 / 5 shape converting means, the AAL2 / 5 shape converting means and the control station matching means, the frame division and recombination means and the control station matching means, Preferably, the control station matching device of the base station in a wireless communication system, characterized in that by applying a UTOPIA interface scheme to exchange high-speed traffic. The method of claim 1, The control station matching means, Provides a physical communication path with the control station through a communication link (E1 link or STM-1 link), but ATM demultiplexing to provide multimedia services at high speed using ATM traffic in the form of AAL2 and AAL5 when matching E1 trunks ATM Inverse multiplexer that transmits one high-speed data stream using the device over multiple low-speed E1 matching links, and also has ATM 16E1 access per PBA for matching between control stations, AAL2 / AAL5 interconversion processing capacity In consideration of the above, when the number of allocated channels is 700 CDMA channels / LIU PBA, the maximum number of four channels is configured to operate. The system provides a clock for the network synchronizer received from the control station to the clock providing means and transmits the system to the system delivered from the clock providing means. Using the synchronously generated reference clock for link-to-link synchronization between the control station and the base station during traffic transmission The control terminal of the matching device, a base station in a wireless communication system according to claim. The method according to any one of claims 1 to 3, The communication protocol between the control station matching device and the base station transceiver is A control station matching device of a base station in a wireless communication system, characterized in that it supports an inter-processor communication protocol by selectively applying Ethernet (TCP) / IP or ATM transmission scheme.