KR20000041913A - No.7 signal network management protocol - Google Patents

Abstract

PURPOSE: A No.7 signal network management protocol is provided to reduce a signal link set and a load of a signal point by storing and transferring access state variation information to a plurality of signal points in an extended transfer prohibited(XFP) or extended transfer allowed(XFA) message. CONSTITUTION: In a No.7 signal network management protocol, in a case where a signal link set transitions to an unusable state, a transfer prohibited(TFP) message to each of signal points communicating by use of a corresponding signal link set is transferred to an XFP message through an usable signal link set. In a case where the unusable signal link set transitions to an usable state, a transfer allowed(TFA) message to each of accessible signal points by use of a corresponding signal link set is transferred to an adjacent point where an XFA message is accessed through another signal link set instead of the signal link set. The XFA message is generated, and then is transferred to an adjacent signal point through an usable signal link set. The XFP message comprises COUNT(n) indicating the number of prohibited signal points, DEST(1)_L-DEST(n)_L indicating eight lower bits of a signal point code changed into an access prohibition, and DEST(1)_H-DEST(n)_H indicating six upper bits of a signal point code changed into an access prohibition.

Description

No.7 Signaling Network Management Protocol

The present invention relates to the number seven (No. 7) signaling network management protocol (Protocol), in particular a plurality of signals when the transmission of a plurality of TFA (Transfer Allowed) or TFP (Transfer Prohibited) message to a specific adjacent signal point is required The present invention relates to a number seven signaling network management protocol for transmitting an access state change information on a point in a single XFP (Extended Transfer Prohibited) or XFA (Extended Transfer Allowed) message.

In the signaling network management function of the general number seven protocol, information on the change of the access state of a signaling point should be exchanged, using a TFA message and a TFP message.

The TFP message indicates a level 3 message format. As shown in FIG. 1, the TFP message is represented by '10' in the case of National and '00' in the case of International. NI (Network Indicator) represented by ', DUM (Dummy) represented by' 00 ', SIO (Serve Information Octet) to distinguish the user part, and DPC_L (Destination Point Code) which is the lower 8 (Bit) of the message destination signal point code. Low), Originating Point Code Low (OPC_L), which is the lower 2 (Bit) of the message originating signal point code, DPC_H (Destination Point Code High), which is the upper 6 (Bit) of the message originating signal point code, and the message originating signal point Originating Point Code Middle (OPC_M), which is the 8th bit of the code, Signaling Link Selection (SLS) that stores information for Load Share of signaling messages, and Higher 4 (Bit) of the originating signal point code of the message. OPC_H (Originating Point Code High) and network management message type H0 (Head 0), which is the lower 4 (Bit) (eg, '0100'), H1 (Head 1), which is the upper 4 (Bit) (eg, '0001') in the form of network management message, and the status is It includes DEST_L (Affected Point Code Low), which is the lower 8 (Bit) of the changed signal point code, and DEST_H (Affected Point Code High), which is the upper 6 (Bit), of the signal point code whose state is changed to prohibition of access.

On the other hand, although not shown in FIG. 1, the actual transmission message through the level 2 includes a start flag of 1 (Byte), a backward sequence number (BSN) of 7 (Bit), and a value of 1 (Bit). Backward Indicator Bit (BIB), Forward Sequence Number (FSN) of 7 (Bit), Forward Indicator Bit (FIB) of 1 (Bit), Length Indicator (LI) of 6 (Bit), and 2 (Bit) Dummy, 2 (Byte) CK (Cyclic Redundancy Check), and 1 (Byte) End Flag are further included.

As a result, adding 7 (Byte) to the length of the TFP message shown in FIG. 1 becomes the length of the entire transmission message.

In addition, since the TFA message has the same format as the TFP message, a description of the display is omitted.

Then, the D-type number seven network for testing the network management procedure of the general number seven protocol is a signal link set (LS1 ~ ~) as shown in Figure 2, a plurality of signal points (A ~ F) Connected to each other via LS8). Here, when the first signal point A is a local signal point, the second, third and sixth signal points B, C, and F become adjacent signal points, and the fourth and fifth signal points D and E are used. Becomes the power station signal point that does not perform the signal repeater function. Also, the sixth signal point F also does not perform a signal repeater function, and the signal points that perform the signal repeater function are first to third signal points A to C.

The configuration of the signal route in the number seven network as shown in Figure 2 is shown in Table 1 below. Here, the part marked with '-' indicates that there is no message transmission to the corresponding signal point.

A B C D E F A - LS1, LS2 LS2, LS1 LS1, LS2 - LS3 B LS1 - LS4 LS5, LS4 LS6, LS4 LS1 C LS2 LS4 - LS7, LS4 LS8, LS4 LS2 D LS5, LS7 LS5, LS7 LS7, LS5 - - LS5, LS7 E LS8, LS6 LS6, LS8 LS8, LS6 - - LS8, LS6 F LS3 LS3 LS3 LS3 LS3 -

For example, the signal route from the first signal point A to the second signal point B is defined by the first and second signal link sets LS1 and LS2, which are the first signal points A. Message to the second signal point (B) in the first signal link set (LS1) as a normal signaling route (Normal Signaling Route), and the second signal link set (LS2) as a standby signaling route (Stand-by Signaling Route) ) Is used.

As another example, the signal route from the first signal point A to the fifth signal point E is defined by the first and second signal link sets LS1 and LS2, and the corresponding first signal point A In this case, the message directed to the fifth signal point E indicates that the first and second signal link sets LS1 and LS2 are used as the load share.

Meanwhile, the TFP message in the number seven network as shown in FIG. A network management message transmitted by a direct link set (DR) to an available neighboring signal point when a situation in which an abnormal transmission is not possible occurs. The neighboring signal point receiving the corresponding TFP message is the corresponding TFP message It is used for signal route management using.

Next, the generation process of the TFP message will be described. The TFP message transmission due to the occurrence of signal point unavailability, the TFP message transmission due to the request for message delivery to an inaccessible signal point, and the message circulation preventive Consider three cases of TFP message transmission for.

In the first case, a broadcast method is used when access to the sixth signal point F becomes impossible. In the first signal point A, which serves as a signal repeater, an adjacent set of direct link sets is available. The TFP message for the sixth signal point F is transmitted to the second and third signal points B and C, which are signal points.

Then, the second signal point B receives the TFP message for the sixth signal point F and passes through the first signal point A from the second signal point B to the sixth signal point F. FIG. Since the signaling route used for message delivery is not available and can no longer transmit a message to the sixth signaling point F, the direct link set is available except for the direct link set LS2 that received the TFP message. The TFP message for the sixth signal point F is transmitted to the third, fourth and fifth signal points C to E. The third signal point C also performs the same operation as the second signal point B. FIG.

Accordingly, the fourth and fifth signal points D and E that receive the TFP message for the sixth signal point F through the second and third signal points B and C are the sixth signal point. Since there is no available signal route to (F), traffic to the sixth signal point (F) is not generated.

In the second case, the response method is a response method. In the case where the sixth signal point F cannot be accessed as in the first case described above, the second signal point B is the fourth signal point D. FIG. When a message transfer request to the sixth signal point F is received through the second signal point B, the second signal point B delivers a TFP message for the sixth signal point F to the fourth signal point D, and 6 Signal point F notifies you that it is not accessible.

In a third case, in a situation where all the link sets are available, traffic from the first signal point A to the fifth signal point E as the destination may cause the first and second signal link sets LS1 and LS2 to pass through. Since the load share is used, the TFP message for the fifth signal point E is transmitted from the first signal point A to the second and third signal points B and C. This is to prevent the message having a specific SLS from circulating due to the second or third signaling point (B, C) delivering traffic to the fifth signaling point (E) to the first signaling point (A). will be.

In this case, the TFP message for the fourth signal point D is transmitted from the first signal point A to the second signal point B for the same purpose as described above.

On the other hand, the TFA message in the number seven network as shown in Figure 2 was unable to transmit the message due to the failure recovery on the signal transmission interval at the first to the third signal point (A to C) serving as a signal repeater When a message can be transmitted to a specific signaling point again, a network management message is transmitted to a neighboring signaling point that can be used by a direct link set. The neighboring signaling point that receives the TFA message is used for signal routing management using the corresponding TFA message. Done.

Then, for example, the generation process of the TFA message will be described. The TFA message transmission due to the conversion of the third signal link set LS3 from the unavailable state to the available state, and the RST (Route Set Test) for the accessible signal point We take a look at receiving messages and sending TFA messages to available signal routes that are not used to carry traffic.

In the first case, when a specific signal point is accessible, the first signal point A, which serves as a signal repeater, restarts an adjacent signal point restart due to the sixth signal point F and the direct link set availability. It has a case to perform.

Therefore, after the restart operation with the sixth signal point F is completed, the sixth signal point (A) is transmitted to the second and third signal points (B, C) in which the direct link set is available at the first signal point (A). Send a TFA message for F).

Then, the second signal point B receives the TFA message for the sixth signal point F and passes through the first signal point A from the second signal point B to the sixth signal point F. FIG. Since the signaling route to the UE is available and the message can be transmitted in a situation where the message could not be transmitted to the sixth signaling point F, the direct link set is available except for the direct link set that received the TFA message. The TFA message for the sixth signal point F is transmitted to the third, fourth and fifth signal points C to E. The third signal point C also performs the same operation as the second signal point B. FIG.

Accordingly, the fourth and fifth signal points D and E that receive the TFA message for the sixth signal point F through the second and third signal points B and C are the sixth signal point. The signaling route using the second and third signaling points B and C among the signal routes to (F) is made available and traffic to the sixth signaling point F is resumed.

However, since it does not act as a signaling transfer point (STP), there is no longer a broadcast of a TFA message.

In the second case, in a situation where traffic can be transmitted from the first signal point A to the sixth signal point F, the RST for the sixth signal point F is determined as the second or third signal point. When received from (B, C), the first signal point (A) transfers the TFA message for the sixth signal point (F) to the second or third signal point (B, C).

In a third case, in a situation where all the link sets are available, traffic from the first signal point A to the fourth signal point D as the destination directs the first signal link set LS1 to a direct route. ) And the second signal link set LS2 is used as an alternative route. Accordingly, since the traffic having the destination point at the sixth signal point F at the first signal point A uses the first signal link set LS1, the first signaling point D has a different signaling route to the fourth signal point D. The TFA message for the fourth signal point D is transmitted to the third signal point C connected to the two signal link set LS2. This occurs in the opposite situation to the prevent TFP message, since this is because traffic whose destination is the fourth signal point D cannot circulate between the first signal point A and the third signal point C.

On the other hand, in the number seven network as shown in Figure 2 looks at the process of performing the operation of the case in which the second signal link set (LS2) in the unavailability state of the first signal link set (LS1) In the state in which the first signal link set LS1 is not available, there is no broadcast point inaccessible from the first signal point A, and thus there is no broadcast of the TFP message.

However, various preventive TFP messages (TFP messages for incoming second and fourth signal points B and D) are transmitted to the third signal point C via the second signal link set LS2.

At this time, if the second signal link set LS2 transitions to unavailability, the first signal point A becomes a situation in which traffic transmission from the second to the fifth signal points B to E is impossible. . The first signal point A is a TFP for the sixth signal point F from the second to fifth signal points B to E through the third signal link set LS3, which is a set of available direct links. Send each message.

As another example, another number seven network for testing a network management procedure of the general number seven protocol is connected to each other through a signal link set LS1 to LS7 as shown in FIG. 3. It is. Here, when the first signal point A is a local signal point, the second and seventh signal points B and G become adjacent signal points, and the remaining signal points C to E, F, and H become power station signal points. .

Referring to FIG. 3, a process of performing an operation for unavailability processing of the first signal link set LS1 in the number seven network is performed. At the first signal point A, the first signal link set LS1 When transitioning to the unavailable state, the second to fifth signal points B to E become inaccessible signal points.

Accordingly, each TFP message for the second to fifth signal points B to E is transmitted to the seventh signal point G through the fifth signal link set LS5 which is an available direct link set.

Thus, four TFP messages are transmitted to the seventh signal point G via the fifth signal link set LS5.

As described above, since each TFA message and the TFP message as described above can only transmit information on one signal point whose access state is changed, the access state change information of the corresponding signal point is transmitted using the corresponding TFA message and the TFP message. In a conventional technique in which a change in the access state of a plurality of signal points may occur, that is, a change in the state of a direct link set and a restart of a signal point, a change in state may be applied to each adjacent signal point accessible through the direct link set. You must send a TFP message or TFA message for each signal point that is generated. Accordingly, the transmission of a large number of TFP messages and TFA messages can increase the load of the signal link set and the signal point, and also can inhibit the effective processing of network data.

The present invention is to solve the problems described above, the purpose of using the TFA and TFP messages and at the same time the change of the access state for a plurality of signal points when the transmission of a plurality of TFP or TFA to a specific adjacent signal point is required By storing information in one XFP or XFA message and transmitting it, it is possible to reduce the load of signal link sets and signal points and to efficiently process network data.

1 is a diagram illustrating a form of a TFP message in a general signaling network management function.

Figure 2 is a view showing the shape of a general de-shaped number seven mesh.

3 is a view showing another shape of a general number seven net.

4 is a diagram showing the format of an XFP message in the number seven signaling network management protocol of the present invention.

Explanation of symbols on the main parts of the drawings

A to H: Signal point LS1 to LS8: Signal link set

In order to achieve the object described above, the present invention provides a single XEP message for each TFP message for signal points that communicate using the corresponding signal link set when any signal link set transitions to unavailability. Transmitting on one signal link set; When the unavailable signal link set transitions to an available state, a TFA message for signal points made accessible using the signal link set is converted into one XFA message and a link set other than the corresponding signal link set. It is characterized in that it comprises the step of transmitting to an adjacent point that can be accessed through, generating a single XFA message to the adjacent signal point through the set of available signal links.

In the existing number 7 signaling network management function, the inability to access a specific signal point uses TFP and the access to the signal point transmits and receives information using TFA. Although many TFPs and TFAs have to be transmitted, the present invention transmits access state change information of a plurality of signal points in one XFP or XFA, and stores inaccessible signal point n information in one XFP message. In addition, by storing the information of n accessible signal points in one XFA message and transmitting them to adjacent signal points, the load of each signal link and signal points can be reduced.

As shown in FIG. 4, the XFP message is prohibited to simultaneously transmit to one adjacent signal point to NI, DUM, SIO, DPC_L, OPC_L, DPC_H, OPC_M, SLS, OPC_H, H0 and H1 included in the conventional TFP. COUNT (n), which indicates the number of signal points that have been processed, and n DEST (1) _L to DEST (n) _L, which are the lower 8 (Bit) of the signal point code whose status is changed to no access from the first to nth It further includes n DEST (1) _H ~ DEST (n) _H, which are the upper 6 (Bit) of the signal point code whose state is changed from the first to nth to prohibit access.

Here, the maximum value of the number 'n' in the COUNT (n) is the maximum number of information fields 272 (Octet) that can be transmitted by the number seven signal terminal (Routing Label), Head (Head); Except H0, H1) and COUNT (n), it is 266 (Octet), so it is possible to '133'. Accordingly, when the state of the signal link set and the local signal point are restarted, information to be transmitted in the conventional '133' TFP messages can be delivered in one XFP message according to the present invention.

Since the XFA message has the same format as the XFP message, a description of the corresponding display is omitted.

Next, a process of performing an operation for the case where the second signal link LS2 becomes unavailable in the non-availability state of the first signal link LS1 in the number seven network as shown in FIG. 2 will be described. In the state in which the link LS1 is not available, there is no signal point inaccessible from the first signal point A, so that there is no broadcast of the TFP message.

However, various types of prevention TFP messages (TFP messages for the second and fourth signal points B and D, which are destination points), are connected to the third signal point (LS2) through the second signal link LS2 using one XFP message. To C).

At this time, when the second signal link LS2 is unavailable, the first signal point A becomes a situation in which traffic transmission from the second to the fifth signal points B to E is impossible. The first signal point A is a TFP message for the second to fifth signal points B to E to the sixth signal point F through the third signal link LS3 which is a set of available direct links. Is transmitted using one XFP message.

Accordingly, one XFP message is transmitted on the second signal link LS2 and one XFP message is transmitted on the third signal link LS3.

As another example, referring to FIG. 3, a process of performing an operation for processing an unavailability state of the first signal link LS1 in the number seven network as shown in FIG. 3 is described. At the first signal point A, the first signal link LS1 is performed. When the transition to the unavailable state, the second to fifth signal point (B ~ E) becomes an inaccessible signal point.

Accordingly, the seventh signal point G is connected to each of the TFP messages for the second to fifth signal points B to E through the fifth signal link LS5 which is a set of available direct links as one XFP message. To pass.

Thus, one XFP message is transmitted to the seventh signal point G via the fifth signal link LS5.

As another example, in the number seven network as shown in FIG. 3, when the first signal link LS1 performs an operation for changing from an unavailable state to an available state, the first and second signal points A may be described. , B) restarts the adjacent signal points because each adjacent signal point has been changed from inaccessible to accessible due to the availability of the first signal link LS1.

At this time, the first signal point (A) transmits a TFP message to the second signal point (B) for the signal points that are not accessible without using the first signal link (LS1), but in the current state Since the first signal link LS1 is not used and there are no inaccessible signal points, the corresponding TFP message is not generated.

However, after the restart procedure of the adjacent signal point is terminated, the preventive TFP messages for the second signal point B and the third to fifth signal points C to E are transmitted through the first signal link LS1. It is transmitted using one XFP.

In addition, since the second signal point B and the third to fifth signal points C to E have been changed to accessible after performing the restart procedure of the adjacent signal points, the first signal point B and the second signal point C to E may be used. The direct link set except for the first signal link LS1 transmits to the seventh signal point G through the available fifth signal link LS5.

Accordingly, one XFP message is transmitted to the second signal point B using the first signal link LS1 and one XFA to the seventh signal point G using the fifth signal link LS5. The message is sent.

As described above, when the TFA and the TFP message are used according to the present invention and at the time when the transmission of a plurality of TFPs or TFAs to a specific adjacent signal point is required, the access state change information of the plurality of signal points is stored in one XFP or XFA message. By storing and transmitting, the load on the signal link and signal points can be reduced and the processing of network data can be effective.

Claims (3)

When each signal link set transitions to unavailability, transmitting each TFP message for signal points communicating using the signal link set through one available signal link set; When the unavailable signal link set transitions to an available state, a TFA message for signal points made accessible using the signal link set is converted into one XFA message and a link set other than the corresponding signal link set. A number seven signaling network management protocol comprising transmitting to an adjacent point that can be accessed through, and generating a single XFA message to the adjacent signal point through a set of available signal links. The method of claim 1, The XFP message is a COUNT (n) indicating the number of access inhibited signal points to be simultaneously transmitted to one adjacent signal point, and the lower 8 (Bit) of the signal point code whose state is changed to access prohibition from the first to nth. n DEST (1) _L to DEST (n) _L and n DEST (1) _H to DEST (n), which is the top 6 (Bit) of the signal point code whose status has changed to prohibit from first to nth A number seven signaling network management protocol comprising _H. The method of claim 1, Number Seven Signaling Network Management Protocol, which can transmit up to '133' TFP message or TFA message as one XFP message or XFA message when status of signal link set and local signal point resume .