KR20080064070A - Remote reset method and apparatus in a wireless communication system and system thereof - Google Patents

Abstract

A method, an apparatus and a system for resetting a base station at a remote place in a wireless communication system are provided to enable a base station controller to control the base station at a remote place in the wireless communication network where the base station is connected to an Ethernet. An apparatus for resetting a base station includes an Ethernet packet processor(270), a PHY(PHYsical layer protocol) layer processor(210) and an MAC(Media Access Control) layer processor(230). The Ethernet packet processor is located between the PHY layer processor, which is for being connected to the Ethernet at a physical layer, and the MAC layer processor and matches an Ethernet packet transmitted or received in the GMII or the MII type. The Ethernet packet processor receives various control packets including a remote reset control packet transmitted from an ACR(Access Control Router) to an RAS(Radio Access Station)(250), and performs corresponding operations. Ethernet packets remaining except the control packet are transferred to the MAC layer processor. Namely, the ACR transmits the remote reset control packet, for instructing a CPU, a power unit and an RF unit of the RAS to be reset, to the RAS if redriving the RAS is necessary. Then, the Ethernet packet processor receives the remote reset control packet, resets a corresponding target block and redrives the target block.

Description

Method and apparatus for remote reset of a base station in a wireless communication system and system therefor {REMOTE RESET METHOD AND APPARATUS IN A WIRELESS COMMUNICATION SYSTEM AND SYSTEM THEREOF}

1 is a block diagram showing the configuration of a general broadband wireless communication system;

2 is a block diagram showing the configuration of a base station according to an embodiment of the present invention;

3 is a block diagram showing the configuration of a remote reset device of a base station according to an embodiment of the present invention;

4 is a format diagram showing a field configuration of a remote reset control packet according to an embodiment of the present invention;

5 is a flowchart illustrating a remote reset method of a base station according to an exemplary embodiment of the present invention.

The present invention relates to a method and apparatus for controlling a base station in a wireless communication system, and more particularly, to a method and apparatus for controlling a base station using Ethernet in a broadband wireless communication system and a system thereof.

Communication technologies for providing packet data services to users in a wireless communication environment include 2.5G or 3G mobile communication technologies such as 3GPP2 CDMA 2000 1x, 1xEV-DO, 3GPP GPRS, UMTS, and Institute of Electrical and Electronics. Engineers) It is divided into 802.11 Wireless Local Area Network (WLAN) technology.

Recently, various wireless access technologies such as broadband wireless communication technology based on IEEE 802.16 have been studied in accordance with the evolution of the wireless communication technology. These wireless access technologies are intended to provide broadband packet data services in wireless environments, replacing cable modems such as cable modems or digital subscriber lines (xDSLs) in hot spot areas or home network environments such as public places or schools. It is proposed as an alternative.

1 is a block diagram showing a configuration of a broadband wireless communication system capable of providing the above-mentioned wideband packet data in a wireless environment, which illustrates, for example, a wireless communication system based on IEEE 802.16e.

In general, a base station (BS) providing a wireless access point to a mobile station (MS) in a broadband wireless communication system is called a radio access station (RAS) and controls a plurality of base stations (BS). A base station controller (BSC) is called an access control router (ACR).

In the wireless communication system 100 of FIG. 1, a plurality of MSs 110a and 110b are connected to a wireless network through a plurality of RASs 130a and 130b respectively providing wireless access points in a corresponding service area. Operation of multiple RASs 130a and 130b is controlled via ACR 150. Although only one ACR 150 is shown in FIG. 1, a plurality of ACRs 150 are actually connected to a system to perform a switching operation for communication with a core network 170 such as an IP (Internet Protocol) network. .

In FIG. 1, the ACR 150 is connected to a plurality of RASs 130a and 130b through, for example, Ethernet N1 to transmit and receive various messages for signaling and user traffic. However, if a failure occurs between the ACR 150 and the RAS (130a or 130b), especially when this problem is caused by the RAS, the administrator of the system must restart the corresponding RAS in the remote. If a system is connected between the ACR 150 and the RAS 130a and 130b using, for example, a SONET / SDH network, the RAS may be allocated by assigning a remote reset function of the RAS to an overhead channel. Can be restarted. In addition, assuming a system connecting ACR and RAS using E1 / T1, a remote reset function of the RAS can be implemented using a data communication channel (DCC).

However, when ACR and RAS are connected to a public Ethernet (N1) as shown in FIG. 1, a system administrator directly moves to a place where RAS is installed to restart RAS, and thus there is difficulty in managing the system. .

In particular, when a problem occurs in the central processing unit (CPU) of the RAS in the system as shown in FIG. 1, there is no method for remotely controlling or remotely resetting the RAS. This is because when ACR and RAS are connected using general-purpose Ethernet, unlike A / NET and SDH networks, ACR and RAS are not connected in a 1: 1 manner, so it is impossible to control RAS using only physical layer signals. This is because the packet must be received and the corresponding packet checked.

Therefore, if a problem occurs in the CPU of the RAS, it is impossible to control the RAS during remote control.

Accordingly, the present invention provides a method and apparatus for remote reset of a base station using Ethernet in a broadband wireless communication system, and a system thereof.

In a wireless communication system according to the present invention, a remote reset method of a base station includes: receiving an Ethernet packet including reset control information through Ethernet connected to the wireless communication system; And checking the reset control information to reset the operation of the corresponding target block.

In a wireless communication system according to the present invention, a remote reset apparatus of a base station includes a physical layer processor configured to receive an Ethernet packet including reset control information through Ethernet connected to the wireless communication system; And an Ethernet packet processor for resetting the operation of the corresponding target block by checking the reset control information from the Ethernet packet.

According to the present invention, a wireless communication system for remotely controlling an operation of a base station includes: a base station controller transmitting an Ethernet packet including reset control information through Ethernet connected to the wireless communication system; And at least one base station receiving the Ethernet packet through the Ethernet and checking the reset control information to reset the operation of the corresponding target block.

In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted if it is determined that the detailed description of the present invention may unnecessarily obscure the subject matter of the present invention. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

First, FIG. 2 is a block diagram illustrating a configuration of a base station (RAS) according to an embodiment of the present invention, which receives a remote reset control packet to be described later from a base station controller (ACR) according to an embodiment of the present invention. The configuration of the RAS that performs the reset operation is briefly shown.

The RAS 200 of FIG. 2 includes a physical layer (PHY) processor 210, a MAC (MAC) layer processor 230, a remote control target block 250, and an Ethernet packet processor 270. In general, a communication device such as RAS that transmits and receives Ethernet packets provides a MAC chip that performs a switching operation according to a MAC (Media Access Control) protocol when data is transmitted and received through Ethernet, and access to a physical (PHY) layer such as Ethernet. A physical layer protocol (PHY) chip is provided.

The interface between the MAC chip and the PHY chip is specified in IEEE 802.3, and the interface is defined to use, for example, MII, GMII, and the like. The Gigabit Media Independent Interface (GMII) is an interface that supports the use of the MAC layer in any physical layer between the physical layer and the MAC layer. The GMII is an extension of MII (Media Independent Interface) generally used in fast Ethernet, and supports data rates of 10, 100, and 1000 Mbps, for example. In FIG. 2, the PHY layer processor 210 and the MAC layer processor 230 are components corresponding to the PHY chip and the MAC chip, respectively.

In FIG. 2, the remote control object block 250 includes functional blocks of the RAS 200 that can be reset and re-driven through the Ethernet packet processing unit 270 of the present invention. The remote control target block 250 includes a CPU 251 for controlling the overall operation of the RAS, a power supply unit 253 for supplying operation power, and an RF unit 255 for processing a radio signal. The remote control target block 250 of FIG. 2 illustrates a functional block that can be a remote control target, and another functional block that can be re-driven through the Ethernet packet processing unit 270 that has received the remote reset control packet of the present invention. It would also be possible to add

In FIG. 2, the Ethernet packet processor 270 is located between the PHY layer processor 210 and the MAC layer processor 230 for accessing Ethernet to the physical layer, and matches Ethernet packets transmitted and received in a GMII or MII manner. In addition, the Ethernet packet processor 270 receives various control packets including a remote reset control packet transmitted from the ACR to the RAS according to the present invention, and performs a corresponding control operation. The remaining Ethernet packets other than the control packet are delivered to the MAC layer processor 230.

That is, when a specific RAS needs to be restarted, the ACR transmits a remote reset control packet instructing the reset of the CPU 251, the power supply unit 253, or the RF unit 255 of the RAS as the destination of the RAS. Then, the Ethernet packet processing unit 270 receives the remote reset control packet, resets the target block, and restarts the target block.

3 is a block diagram showing the configuration of a remote reset device of a base station (RAS) according to an embodiment of the present invention, which shows in detail the configuration of the Ethernet packet processing unit 270 of FIG.

The remote reset device 300 of FIG. 3 includes a PHY interface 301, a MAC address checker 303, a MAC interface 305, a CPU interface 307, a payload pattern checker 309, a register 311, and an encryption analysis. A unit 313 and a reset processing unit 315 are included.

The PHY interface 301 and the MAC interface 305 respectively provide a matching function for transmitting and receiving packets with the PHY layer processing unit 210 and the MAC layer processing unit 230 of FIG. 2, for example, MII and GMII. When the Ethernet packet is received through the PHY interface 301, the MAC address checker 303 checks the destination MAC address of the packet. At this time, the MAC address for confirmation is provided from the register 311.

If the MAC address of the RAS stored in the register 311 and the destination MAC address of the Ethernet packet are the same, the MAC address checker 303 transfers the corresponding Ethernet packet to the payload pattern checker 309. The packet is forwarded to the MAC interface 305. The payload pattern checker 309 checks the payload of the Ethernet packet, and when the pattern of “0110_1001_0110_1001” is detected from the first portion of the payload, the payload pattern checker 309 considers that the remote reset control packet has been received and receives the received packet. It passes to the password analysis unit 313. The pattern may be confirmed through pattern information previously stored in the register 311. In addition, the register 311 may store operation for each state of the rear control bit to be described later.

The encryption analyzer 313 decrypts the received remote reset control packet and notifies the reset processor 315 of the decrypted reset control bit. The reset processor 315 may then perform at least one of the CPU 251, the power supply unit 253, or the RF unit 255 in the remote control target block 250 based on the reset control bit received through the cryptographic analyzer 313. Reset one.

Hereinafter, an example of the remote reset control packet and the reset control bit will be described with reference to FIG. 4 and Table 1 below.

4 is a format diagram illustrating a field configuration of a remote reset control packet according to an embodiment of the present invention.

In FIG. 4, the DA (Destination Address) field 401 indicates a 6-byte destination MAC address, and the SA (Source Address) field 403 indicates a 6-byte source MAC address. The Length & Type field 405 indicates the length of the control packet and the message type, for example, has a length of 2 bytes. In addition, the payload pattern field 407 includes two bytes of pattern information indicating that the corresponding Ethernet packet is a remote reset control packet. The pattern information is set, for example, "0110_1001_0110_1001". In FIG. 4, an encryption data field 409 includes an encrypted reset control bit and has a length of 8 to 40 bytes. Other zero padding fields 411 (0 to 32 bytes), a cycle redundancy check (CRC) field 413 (4 bytes), and a header error check (HEC) 415 (4 bytes).

The field configuration of FIG. 4 illustrates an example of a remote reset control packet. When only the information corresponding to the reset control bit is included, the configuration of the remote reset control packet may be modified in various forms.

In FIG. 3, when "CPU_RESET" is determined to be a value of "1" in Bit0 in the <Table 1>, the reset processing unit 315 resets the CPU 251 and "POWER_RESET" is set to a value of "1" in Bit1. When it is confirmed, the power unit 253 is reset, and when "RF_RESET" is confirmed as a value of "1" in Bit2, the RF unit 255 is reset. And in Bit3 to Bit7, "Reserved" means a reserved bit.

Therefore, according to the above configuration, the remote reset device of the present invention can reset the operation of the RAS by receiving a remote reset control packet from the ACR even when the CPU of the RAS malfunctions or stops. In addition, in the above embodiment, it is assumed that the remote reset control packet is transmitted from the ACR to the RAS, but it may be configured to transmit the remote reset control packet to the RAS through another network management means connected to the Ethernet.

5 is a flowchart illustrating a remote reset method of a base station according to an exemplary embodiment of the present invention.

First, in step 501, the RAS receives an Ethernet packet from the ACR through Ethernet. In step 503, the MAC address checker 303 of the Ethernet packet processor 270 checks the destination MAC address of the received Ethernet packet and the MAC address of the RAS previously stored in the register 311. If it is confirmed in step 505 that both MAC addresses are the same, the received Ethernet packet is transmitted to the payload pattern checker 309. In step 507, the payload pattern checker 309 checks the pattern in the first part of the Ethernet packet and the pattern information previously stored in the register 311. If the two patterns are found to be the same in step 509, the payload pattern checker 309 regards the received Ethernet packet as the remote reset control packet of the present invention and transmits it to the cryptographic analyzer 313. In operation 511, the encryption analyzer 313 decrypts the remote reset control packet, extracts the reset control bit from the decrypted data, and notifies the reset processor 315. In step 513, the reset processing unit 315 resets the operation of the corresponding remote control target block according to the identified reset control bit.

In FIG. 5, when the two MAC addresses are not the same in step 505 or the payload pattern is not the same in step 509, since the received Ethernet packet is not a remote reset control packet, the corresponding Ethernet packet is transmitted to the MAC layer. In step 515, MAC layer processing is performed.

As described above, according to the present invention, it is possible to remotely control RAS through ACR in a broadband wireless communication system in which RAS is connected to Ethernet.

In addition, according to the present invention, it is possible to remotely control ACR and RAS while maintaining security using general-purpose Ethernet.

Claims (11)

In the remote reset method of the base station in a wireless communication system, Receiving an Ethernet packet including reset control information through Ethernet connected to the wireless communication system; And Checking the reset control information to reset the operation of the corresponding target block. The method of claim 1, An Ethernet packet including the reset control information is transmitted from a base station controller. The method of claim 1, The process of confirming the reset control information is Checking whether a destination MAC address of the Ethernet packet is identical to a predetermined MAC address; Checking whether the payload pattern of the Ethernet packet is the same as the determined pattern when the destination MAC address is the same as the determined address; And And extracting the reset control information from the Ethernet packet when the payload pattern and the predetermined pattern are the same. The method of claim 1, The target block includes at least one of a central processing unit (CPU), a power supply unit, and an RF unit of the base station. The method of claim 1, The reset control information is transmitted encrypted. And extracting the reset control information by decoding the payload of the Ethernet packet. In the remote reset device of the base station in a wireless communication system, A physical layer processor configured to receive an Ethernet packet including reset control information through an Ethernet connected to the wireless communication system; And And an Ethernet packet processing unit for checking the reset control information from the Ethernet packet and resetting an operation of the corresponding target block. The method of claim 6, An Ethernet packet including the reset control information is transmitted from a base station controller. The method of claim 6, The Ethernet packet processing unit A MAC address checker to check whether a destination MAC address of the Ethernet packet is identical to a predetermined MAC address; A payload pattern checker for checking whether the payload pattern of the Ethernet packet is the same as the determined pattern when the destination MAC address is equal to the determined address; And And a reset processing unit for resetting an operation of the target block according to the reset control information when the payload pattern and the predetermined pattern are the same. The method of claim 6, And the target block includes at least one of a central processing unit (CPU), a power supply unit, and an RF unit of the base station. The method of claim 6, The reset control information is transmitted encrypted. The Ethernet packet processing unit further comprises a cryptographic analysis unit for extracting the reset control information by decoding the payload of the Ethernet packet. In the wireless communication system for remotely controlling the operation of the base station, A base station controller configured to transmit an Ethernet packet including reset control information through Ethernet connected to the wireless communication system; And And at least one base station for receiving the Ethernet packet through the Ethernet and confirming the reset control information to reset the operation of the corresponding target block.

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