KR0129141B1 - Method of Controlling Communication Path between Two Points in CDMA Mobile Network Node - Google Patents

Abstract

The present invention relates to a two-point communication path control method in a CDMA mobile communication self-routing network node, and more particularly, to provide a method for controlling two-point communication path in a CDMA mobile communication network node according to the present invention. By using the casting group address and the multicasting control address attribute of the node itself for path control, self-routing of the message frame for group multicasting communication can be performed even under a network structure of various topologies.

Description

Method of Controlling Communication Path between Two Points in CDMA Mobile Network Node

1 is an exemplary diagram of a CDMA mobile communication network structure.

2 is an exemplary diagram of a structure of an address attribute for path control.

3 is a flowchart illustrating a bit-by-bit path control scheme using an address and an attribute of the present invention.

FIG. 4 is an operation flowchart of the integrated method of bit-wise path control results of FIG. 3 for each bit of a maximum address of 3 bytes for communication path control between two points.

FIG. 5 is a flowchart illustrating the operation of the two-point communication path control method of the present invention using results from FIG. 4 and control signals related to bus arbitration and node loopback test.

The present invention relates to a two-point communication path control method in a CDMA mobile communication self-routing network node. In particular, the present invention relates to a network structure of various topologies by using a path control using a destination address of a message frame and an address and attributes of the node itself. The present invention relates to a method for controlling two-point communication paths in a CDMA mobile communication network node to enable self-routing of message frames for two-point communication. In general, the communication path between two points will be described with reference to FIG. 1 attached to a CDMA mobile communication network structure. The two top-level networks, the router network GCIN 100, are distributed between the control station network LCIN 104. Has a function to provide a communication path. The LCIN 104 performs a message routing function relating to CDMA traffic information between the BIN 109, which is the base station network, and the SBS, and control information between the BIN and the CCP. The BIN 109 has a relay line function for the traffic information between the CE and LCIN channels, the control information between the BCP and the LCIN, and the matching 107 with the LCIN. Each unit network (100, 104, 109) consists of up to 256 furnaces on a redundant system backplane bus, each node being a single processor node 105, a redundant processor node 101, a single bridge node, depending on the operational state. 106 and the redundant bridge node 102. In the case of a redundant node, one node is allocated on each of the redundant buses, so that even if the bus is switched due to a failure on the bus, it can operate normally. The U-link cable 103 connecting the redundant bridge nodes is configured in end-to-end and crossover manners to provide a normal message path even in the case of simultaneous failure of one for each redundant node. The U-link cable between LCIN and BIN is implemented with a T1 or E1 relay line 108, taking into account the local installation location of the CDMA mobile base station. The HCIP in each network has a clock supply function for maintenance and system bus arbitration in the unit network. The BSM, which exists only in GCIN, is responsible for the operation and maintenance control and program loading of the entire CDMA mobile base station. It has a function. CCP in LCIN has control function of call processing in LCIN and exchange CDMA related information of base station and SBS with mobile communication exchange period. SBS has traffic data distribution / access and relay function, voice information transmission and reception with mobile station and CAI protocol. It has a message processing function. BCP, which exists only in the BIN, has the control function and alarm collection function of the entire BTS constituting the BIN. The DM has the function of monitoring various CDMA-related information and matching with the operator. Referring to FIG. 2 attached to the structure of an address attribute for path control in the above structure, each node has not only its own node address 212 but also three attributes, namely, mask address 213 attributes, for path control. It has a control address 214 attribute and a multicasting control address 215 attribute. The mask and control address attributes consist of three bytes each of path control attribute bits corresponding to each bit of the node address 212. The frame used in the communication network has a frame structure of an HDLC format in which an address area is extended. The one byte start flag 200 representing the first byte of the received frame has a fixed bit pattern, i.e. 1111110, with the end flag, followed by the first address 201, the second address 202, and the third. Address 203 and fourth address 204 data are allocated. The fourth address area is address bits pushed backward when 0 bits are forcibly allocated in communication by the HDLC communication method, and addresses that can be pushed due to a maximum of 4 forced insert 0 bits that can be generated in a 3 byte address area. Corresponds to the region reflecting 4 bits. When a frame is received, the 0 bits forced into the address area are removed and the first address byte is reconstructed as the highest byte of the 24 bits, the logical structure of the frame address 205, and the third address byte is reconstructed as the least significant byte. That is, each region shown in FIG. 2 of the frame address 205 represents an addressing scheme under the topolo, which is configured as shown in FIG. 1, and the destination router network address at the top of FIG. 1 of the GCIN address region 206. FIG. LCIN address area 207 indicates the destination control station network address in the middle of FIG. 1, and BIN address area 208 indicates the destination base station network address in the lowest part of FIG. The terminal address area 210 represents a unique address of a destination node constituting each network, with a destination identification number for distinguishing a plurality of links between the BINs. The spare area 211 is a part considering the case where an address bit is additionally required according to the network extension and is masked and ignored during path control. The node address 212 is an address basically used in the path control together with the frame address 205 received as a unique address owned by the node itself. The mask address 213 has a function of causing a bit set in an address attribute of the present invention for masking bits during self-routing path control to be masked with don't care processing during path control. The control address 214 is an attribute that controls the comparison process for each bit of the frame address 205 and the node address 212. The attribute is only an attribute when a mask address bit corresponding to the corresponding bit position is not set in the path control. When this control address bit is set, the path control result of the corresponding bit is set only when the frame address corresponding to the bit and the node address are different, and when the control address bit is reset, the bit is set. An attribute used to set a path control result of a corresponding bit only when the frame address corresponding to the node address and the node address are equal to each other. The multicasting control address 215 is an attribute that supports multicasting communication of message frames by determining a group of each node. The multicasting control address 215 includes a network layer setter area 216 and a node terminal group setter area 217. Each bit of the network layer setter area 216 is an area where the network layer of the node is set in the direction from the upper bit to the lower bit, and the node terminal group setter area 217 is an area for setting a group of the node. If N, the network layer setter area may consist of N bits, and the node terminal group setter area may consist of (8-N) bits. However, the path control algorithm between two points of the conventional frame address checker, which has been dependent on the CDMA mobile communication self-routing network having the above structure, is self-routing for the message frame for group multicasting communication under various network structures. The problem arises that this is not done.

An object of the present invention for solving the above problems is to use the destination address of the message frame, and the address and attributes of the node itself for the path control to self-routing the message frame for two-point communication even under the network structure of various topologies The present invention provides a method for controlling a point-to-point communication path in a CDMA mobile communication network node to enable this. A feature of the present invention for achieving the above object is, in the two-point communication path control scheme in a CDMA mobile communication self-routing network node, the frame currently received when the processor node is connected to the processor by checking its own characteristics A first step of examining a test mode path control state indicating whether the node itself is for loopback testing; and a second step of disallowing reception of a frame and ending path control if the test result is determined to be in a reset state at the first step. A third step of allowing a reception of a corresponding frame if the check result is set in the first step; and a step of checking a frame transmission state of a data bus from the node itself in the third step of transmitting Is a path received by the node itself, indicating that it is currently testing the node loopback as a frame sent by the node itself. In the fourth process of checking the form of, and if the path control type is the test mode path control type, the test mode path control result is examined, and if the result is set, the reception of the frame is allowed; A fifth step of disabling the reception of the frame when the frame transmission status check result of the data bus from the node itself is waiting in the third step; After checking the mode path control status, if it is reset, check the frame stamp status of the data bus from the node itself. If the transmission operation is in progress, the frame reception is disabled and if it is waiting, the normal mode path control result status from FIG. According to the seventh step of checking and the result of the checking, if the reset state is set, the reception of the frame is disabled and the set state The eighth step of allowing the frame frame reception.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. 3 is an operation flowchart of a bit-by-bit path control method using an address and an attribute of the present invention, and shows a path control method for each bit of a maximum of 3 byte (24 bit) address areas used for frame address checking. When the message frame is received, the node itself first checks the state of the mask address bit M [N] corresponding to each bit on the frame address (S300). If the checked mask address bit is set, it indicates that the bit on the corresponding frame address is ignored in the path control, so the normal mode comparison result (PCOA [N]) for that bit and the test mode comparison result (PCOB [N) for that bit ]) Is set (S301) and ends. If it is reset, the corresponding control address bit C [N] is then checked (S302). If it is reset, the bit of the frame address and the bit of the node address are compared (S303). In case of different values, the mode reset result of the test mode comparison result (PCOB [N]) and the normal mode comparison result (PCOA [N]) for the corresponding bit (S304, 305). If the control address bit (M [N]) state 302 is set, then the address bit (F [N]) on the frame is compared with the address bit (A [N]) of the node itself (S306). Only the test mode comparison result PCOB [N] for the bit is set (S307) and the normal mode comparison result PCOA [N] is reset (S305). If the frame address bit and node address bit value are different, only the normal mode comparison result (PCOA [N]) is set for the corresponding bit, and the test mode comparison result (PCOB [N]) is reset. 4 is a diagram illustrating a method of integrating the result of bit-wise path control of FIG. 3 for each bit of a maximum address of 3 bytes for communication path control between two points. Examine the entire 24-bit result value of the general mode comparison result (PCOA [N] (S400). If all the bits are set, set the general mode path control result (PCONA) and reset any bits. If the bit is present, the normal mode path control result is reset (S402). In addition, all 24 bit result values of the test mode comparison result PCOB [N] are examined (S403). If all the bits are set, the test mode path control result PCONB is set (S404). If the set bit exists, the test mode path control result is reset (S405) and then terminated. FIG. 5 shows the two-point communication path control method of the present invention using the results from FIG. 4 and the control signals related to bus repeat and node loopback test. In the case of the processor node to which the processor is connected by inspecting the characteristics of the node itself (S500), after checking the test mode path control state indicating whether the currently received frame is for loopback testing of the node itself (S501), the reset result is reset. If the status is confirmed, the reception of the frame is denied (S503) and the path control is terminated. If the status is set, the reception of the frame is permitted (S507). When the test mode path control state is set (S501), the frame transmission state of the data bus is checked from the node itself (S504). If the transmission operation is in progress, the currently received frame is a frame transmitted by the node itself, and the node loopback test is performed. Indicated that the operation is in progress, the mode ASEL is checked (S505). If the path control mode is determined to be the normal mode path control, the control proceeds to step S502 of checking the state of the normal mode path control result PCONA, and if the test mode path control mode is the test mode path control result from the fourth road ( In step S506 of checking PCONB, if the result is set, the reception of the frame is allowed (S507). If the reset is not allowed, the reception of the frame is not allowed (S508). When the frame transmission status check (S504) result of the data bus from the node itself is waiting, the reception of the frame is disallowed (S508) and the path control ends. If the characteristic of the node itself is a bridge node, the test mode path control state is checked (S509), and if it is set, the process transitions to step 504, and if the node itself is set, the frame stamp state of the data bus from the node itself is checked (S510). In step S511, the reception of the frame is denied if the transmission operation is in progress, and the normal mode path control result PCONA state from FIG. According to the result of the check, if the reset state is not allowed to receive the frame (S508), if the set state is allowed to receive the frame (S512) and ends.

In the CDMA mobile communication network node operating according to the present invention, the method of controlling the two-point communication path between nodes uses the multicasting group address of the message frame and the multicasting address address attribute of the node itself for the path control. As a result, even in a network structure of various topologies, self-routing can be performed for message frames for group multicasting communication.

Claims (1)

In the two-point communication path control method in a CDMA mobile self-routing network node, a test mode indicating whether the currently received frame is for loopback testing of the node itself when the processor node is connected by checking the characteristics of the node itself. A first step of checking a path control state; A second step of disabling the reception of the frame and ending the path control when the test result is confirmed to be in the reset state in the first step; A third step of allowing the reception of a corresponding frame when the check result is set in the first step; In the third step, if the frame transmission state of the data bus is checked from the node itself, and the transmission operation is performed, the form of path control is checked by indicating that the currently received frame is a node loopback test as a frame transmitted by the node itself. 4 courses; A fifth step of checking a test mode path control result if the path control mode is a test mode and allowing the reception of a frame if the result is set, and disabling the reception of a frame if the path control mode is set; A sixth step of disallowing the reception of the frame when the frame transmission status check result is waited for the data bus from the node in the third step; If the node's own characteristic is a bridge node, the test mode path control state is checked and if it is reset, the frame stamp state of the data bus from the node itself is checked. A seventh step of checking a normal mode path control result state from 4 degrees; And an eighth step of disallowing frame reception in the reset state and allowing the frame reception in the set state according to the result of the checking.