WO2011069448A1

WO2011069448A1 - Control method, device and communication system of direct tunnel

Info

Publication number: WO2011069448A1
Application number: PCT/CN2010/079555
Authority: WO
Inventors: 陈靖
Original assignee: 华为技术有限公司
Priority date: 2009-12-08
Filing date: 2010-12-08
Publication date: 2011-06-16
Also published as: CN101753638B; CN101753638A

Abstract

The embodiments of the invention disclose a control method, a device and a communication system of a direct tunnel. The embodiments of the invention determine whether to enable a direct tunnel according to network topology information by first obtaining the network topology information. For instance, when the connection status between a Radio Network Controller (RNC) and a Gateway General packet radio service Support Node (GGSN) is normal, the direct tunnel is enabled. Compared with the prior art, since the scheme uses factors relating to establish a direct tunnel, such as dynamic network topology information, as the conditions for enabling a direct tunnel, the scheme can control whether to enable a direct tunnel more flexibly and effectively.

Description

Direct tunnel control method, device and communication system

The present application claims the priority of the Chinese application filed on Dec. 8, 2009, with the application number 200910252082.8, entitled "A Direct Tunnel Control Method, Apparatus and Communication System", the entire contents of which are incorporated herein by reference. In the application. Technical field

The present invention relates to the field of communications technologies, and in particular, to a direct tunnel control method, apparatus, and communication system. Background technique

With the continuous development of third-generation mobile communication technology (3G, 3rd-Generation) services and the application of technologies such as High Speed Downlink Packet Access (HSPA), the processing performance of user planes is required. Increasingly, in order to meet these needs, it is necessary to add a Radio Network Controller (RNC) to serve the general packet radio service support node (SGSN, Serving GPRS Support Node, where GPRS is the abbreviation of General Packet Radio Service) and gateway GPRS. The processing performance of the GGSN (Gateway GPRS Support Node); and the operator also needs to reduce equipment investment and operating expenses, as well as facilitate subsequent expansion. Therefore, the 3rd Generation Partnership Project (3GPP) has proposed a Direct Tunnel solution, which is a two-stage tunnel between the original RNC, SGSN and GGSN: between the RNC and the SGSN. Tunnel, the tunnel between the SGSN and the GGSN, cuts a tunnel, that is, directly establishes a tunnel between the RNC and the GGSN, so that the user plane completely skips the SGSN, thereby reducing the majority of the SGSN user plane resources and reducing the operation for the operator. Investment and operating expenses, on the other hand, can reduce user delay and improve user experience. Moreover, the scalability of the solution is good, and the expansion of the user plane no longer needs to upgrade the SGSN, but the core network needs to upgrade the GGSN and other devices. The solution can separate the control plane from the user plane, so that it can be upgraded to the SAE network in the future.

Currently, whether the direct tunnel is enabled in the 3GPP protocol is controlled by the SGSN. When the direct tunnel is enabled, the following conditions are met:

(1) The GGSN and the SGSN belong to the same Public Land Mobile Network (PLMN).

(2) Number of subscriptions by the user in the Home Location Register (HLR, Home Location Register) According to the CAMEL (Customized Applications for Mobile Network Enhanced Logic) signing information.

(3) The GGSN supports the GPRS Tunneling Protocol (GTP, GPRS Tunneling Protocol) vl version.

In actual networking applications, according to the conditions specified in the 3GPP protocol, it is impossible to accurately determine whether direct tunneling is enabled. Summary of the invention

Embodiments of the present invention provide a direct tunnel control method, apparatus, and communication system, which can flexibly and effectively control whether a direct tunnel is enabled or not.

A direct tunnel control method includes:

Obtain network topology information;

The direct tunnel is enabled when the connection status between the RNC and the GGSN is normal according to the obtained network topology information.

A network topology information using device, including:

An obtaining unit, configured to obtain network topology information;

The first processing unit is configured to enable the direct tunnel when the connection state between the RNC and the GGSN is normal according to the network topology information acquired by the acquiring unit.

A network topology information processing device includes:

The network topology information execution unit is configured to perform network topology information detection, obtain network topology information detection result, report network topology information detection result to network topology information collection unit, and network topology information collection unit, Receiving the network topology information detection result reported by the network topology information execution unit, and updating the network topology information saved by the network topology information distribution unit according to the received network topology information detection result;

The network topology information distribution unit is configured to provide the updated network topology information to the network topology information using device.

A communication system includes a network topology information using device and a network topology information processing device; and a network topology information using device, configured to obtain network topology information from the network topology information processing device, according to the obtained network topology When the information determines that the connection state between the RNC and the GGSN is normal, the direct tunnel is enabled;

A network topology information processing device, configured to collect network topology information and send network topology information Use the device for network topology information.

In the embodiment of the present invention, the network topology information is obtained, and then the direct tunnel is determined according to the network topology information. For example, when the connection state between the RNC and the GGSN is normal, the direct tunnel is enabled, because the solution is directly established. Tunnel-related factors, such as dynamic network topology information, are used as conditions for enabling direct tunneling. Therefore, it is possible to control whether direct tunneling is enabled more flexibly and efficiently than in the prior art. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a flowchart of a method provided by Embodiment 1 of the present invention;

2 is another flow chart of the method provided by Embodiment 2 of the present invention;

3 is still another flowchart of the method provided in Embodiment 3 of the present invention;

4 is still another flowchart of the method provided in Embodiment 4 of the present invention;

Figure 5 (a) is a schematic structural diagram of a network topology information using device according to an embodiment of the present invention; and Figure 5 (b) is another schematic structural diagram of a network topology information using device according to an embodiment of the present invention;

FIG. 5(c) is still another schematic structural diagram of a network topology information using device according to an embodiment of the present invention;

Figure 6 (a) is a schematic structural diagram of a network topology information processing device according to an embodiment of the present invention; and Figure 6 (b) is another schematic structural diagram of a network topology information processing device according to an embodiment of the present invention;

Figure 6 (c) is a schematic structural diagram of another network topology information processing device according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a communication system according to an embodiment of the present invention. Specific lung

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, those of ordinary skill in the art do not make All other embodiments obtained under the premise of creative labor are within the scope of the invention. Embodiments of the present invention provide a direct tunnel control method, apparatus, and communication system. The details are described below separately. Embodiment 1

This embodiment will be described from the perspective of the network topology information usage device. The network topology information usage device may be an SGSN.

As shown in FIG. 1 , an embodiment of the present invention provides a method for controlling a direct tunnel, including:

101. Acquire network topology information; the network topology information can reflect the composition and connection status of the entire network;

The network topology information can be obtained in any of the following ways:

(1) receiving connection state information between the RNC and the GGSN sent by the Operation Support System (OSS);

Certainly, before this, the OSS system may also receive a request for an Internet Protocol (IP) address of the GGSN to be detected, and then return a list of IP addresses of the GGSN to be detected to the OSS system according to the received request, so as to The OSS system collects connection state information between the RNC and the GGSN according to the list.

(2) Sending a domain name resolution request with a direct tunnel identifier to the Domain Name System (DNS) system, and receiving the IP address result of the GGSN corresponding to the domain name returned by the DNS system after querying the domain name record; The direct tunnel identifier refers to an indication identifier indicating that a direct tunnel needs to be established, and is not used to identify the established direct tunnel;

Of course, before sending a domain name resolution request with a direct tunnel identifier to the DNS system, it may also include:

Receiving a request sent by the OSS system about the IP address of the RNC to be detected, and then returning the IP address list of the RNC to be detected to the OSS system according to the received request, so that the OSS system collects the connection status between the RNC and the GGSN according to the list. After the information, update the domain name record in the DNS system.

(3) transmitting a radio network resource allocation request to the RNC, where the radio network resource allocation request carries the IP address of the GGSN, and thereafter, receiving the radio network resource allocation response returned by the RNC according to the IP address of the GGSN;

102. When it is determined that the connection state between the RNC and the GGSN is normal according to the obtained network topology information, enable the direct tunnel; for example, for the manner of obtaining the network topology information in the three steps in step 101, The corresponding processing can be as follows:

(1) If the received connection state information indicates that the connection state between the RNC and the GGSN is normal, the direct tunnel is enabled;

(2) If the received IP address result is not empty, the direct tunnel is enabled according to the IP address result; (3) If a successful wireless network resource allocation response is received, the direct tunnel is enabled. The method may further include step 103; as follows:

103. Determine, according to the obtained network topology information, that the connection state between the RNC and the GGSN is abnormal, establish a tunnel that reaches the RNC, and establish a tunnel that reaches the GGSN. For example, how to obtain the network topology information for the three types in step 101. The corresponding processing can be as follows:

(1) If the received connection state information indicates that the connection state between the RNC and the GGSN is abnormal, a tunnel to the RNC is established and a tunnel to the GGSN is established.

(2) If the received IP address result is empty, the domain name resolution request without the direct tunnel identifier is sent, and the IP address result of the GGSN corresponding to the domain name returned by the DNS system is received, and then the arrival RNC is established according to the IP address result. Tunnel and establish a tunnel to the GGSN.

(3) If a radio network resource allocation response indicating failure is received, a tunnel to the RNC is established and a tunnel to the GGSN is established.

Of course, in order to save the signaling process between the network devices, after receiving the wireless network resource allocation response indicating the failure, the method may further include:

A message indicating that the connection status between the RNC and the GGSN is abnormal is generated, and a timer is started, and a direct tunnel is not initiated between the RNC and the GGSN within a preset time of the timer. Of course, in order to release the storage space, after the time preset by the timer expires, the recorded information indicating the abnormal connection state between the RNC and the GGSN can also be cleared.

In addition, after the time preset by the timer expires, the request for detecting the IP address of the GGSN may be sent to the RNC, and the detection result returned by the RNC is received. If the detection result indicates that the connection state between the RNC and the GGSN address is normal, Then, the direct tunnel is allowed to be enabled later; if the detection result indicates that the connection state between the RNC and the GGSN address is abnormal, the timer is continuously started.

It can be seen that, in this embodiment, the network topology information is obtained, and then the direct tunnel is determined according to the network topology information, that is, when the connection state between the RNC and the GGSN is determined to be normal, the direct tunnel is enabled, and vice versa. If the connection status between the RNC and the GGSN is abnormal, a normal two-stage tunnel is established, because the solution will be related to the establishment of a direct tunnel, such as a dynamic network extension. The Pu information is used as a condition for enabling direct tunneling, so that it is possible to control whether or not the direct tunnel is enabled more flexibly and efficiently than the prior art. Embodiment 2

The method described in the first embodiment will be exemplified in detail below.

In this embodiment, the OSS system is used as a network topology information collection unit and a network topology information distribution unit of the network topology information processing device, and the RNC is used as a network topology information execution unit of the network topology information processing device, and the SGSN is used as the SGSN. Network topology information uses devices.

Referring to Figure 2, the specific process can be as follows:

201. The OSS system sends a request for the IP address of the GGSN to be probed to the SGSN.

It should be noted that, since the OSS system has already saved the IP address of the GGSN in some scenarios, step 201 is an optional step.

202. After receiving the request for the IP address of the GGSN to be detected by the OSS system, the SGSN reports the IP address list of the GGSN to be detected to the OSS system according to the received request.

Of course, the SGSN can also use the manner of periodically reporting the IP address list of the GGSN, so step 202 is an optional step.

203. After receiving the IP address list of the GGSN to be detected sent by the SGSN, the OSS system requests the RNC to detect the IP address of the GGSN according to the IP address list of the GGSN to be detected.

Of course, the RNC can also report the connection detection result of the IP address of the GGSN that has established a tunnel with itself to the OSS system by using a timing report. Therefore, step 203 is an optional step.

204. The RNC sends a GTPv1 message to the IP address of each GGSN, such as an Echo Request.

205. If the connection between the GGSN and the RNC is normal, the GGSN may return an Echo Response to the RNC. Otherwise, if the RNC does not receive the Echo Response message returned by the GGSN, the RNC determines the self (ie, RNC) and the GGSN. The connection between the two is abnormal.

206. The RNC summarizes the connection between the IP address of the GGSN and the GGSN, and obtains the detection result of the IP address of the GGSN, and reports the detection result of the IP address of the GGSN to the OSS system. 207. The OSS system updates the connection state information between the RNC and the GGSN saved by the GGSN according to the detection result of the received IP address of the GGSN, and then sends the connection state information between the updated GGSN and the RNC to the SGSN.

After receiving the connection status information between the GGSN and the RNC, the SGSN may determine whether the direct tunnel is enabled for the user, and may determine according to the connection status information, as follows: if the received connection status information indicates the RNC and the GGSN If the connection status is normal, you can enable direct tunneling for the user. If the received connection status information indicates that the connection status between the RNC and the GGSN is abnormal, the direct tunnel is not enabled for the user, but a normal two-stage tunnel is established, that is, a tunnel to the RNC is established and a tunnel to the GGSN is established. It can be seen that the SGSN in this embodiment receives the connection state information between the RNC and the GGSN sent by the OSS system, and then determines whether to enable the direct tunnel according to the connection state information, that is, if the connection state information indicates the RNC and the GGSN. When the connection status is normal, the direct tunnel is enabled. On the other hand, if the connection status information indicates that the connection status between the RNC and the GGSN is abnormal, an ordinary two-stage tunnel is established, because the solution will be related to the establishment of a direct tunnel. That is, the connection state between the RNC and the GGSN serves as a condition for enabling the direct tunnel, so that it is possible to control whether or not the direct tunnel is enabled more flexibly and efficiently than the prior art. Embodiment 3

The same as the implementation of the second embodiment, in the embodiment, the OSS system is also used as the network topology information collection unit of the network topology information processing device, and the SGSN is used as the network topology information usage device, which is different from the implementation two. In the embodiment, the GGSN is used as a network topology information execution unit of the network topology information processing device, and the DNS system is used as a network topology information distribution unit of the network topology information processing device. The prerequisite is that the domain name record with the direct tunnel identifier is configured in the DNS system. In addition to the direct tunnel identifier, the domain name includes:

(1) Access Point Name (APN, Access Point Name), used to identify GGSN

(2) RNC identifier (ID, Identity) or Routing Area Code, used to identify the RNC The IP address of the GGSN corresponding to the domain name is recorded in the domain name record. The SGSN can select the GGSN for the user by sending a domain name resolution request message to the DNS.

Referring to Figure 3, the specific process can be as follows:

301. The OSS system sends a request for the IP address of the RNC to be probed to the SGSN.

It should be noted that since the OSS system has saved the IP address of the RNC in some scenarios, the step, step 301, is an optional step.

After receiving the request for the IP address of the RNC to be detected by the OSS system, the SGSN reports the IP address list of the RNC to be probed to the OSS system according to the received request.

Of course, the SGSN can also periodically report the RNC's IP address list, so step 302 is an optional step.

303. After receiving the IP address list of the RNC that needs to be detected by the SGSN, the OSS system requests the GGSN to detect the IP address of the RNC according to the IP address list of the RNC to be detected.

Of course, the GGSN can report the connection detection result of the IP address of the RNC that has established the tunnel with itself to the OSS system by using the timing report. Therefore, step 303 is an optional step.

304. The GGSN sends a GTPv1 message, such as an Echo Request message, to the IP address of each RNC.

305. If the connection between the GGSN and the RNC is normal, the RNC may return an Echo Response message. Otherwise, if the GGSN does not receive the Echo Response message returned by the RNC, the shell 'j GGSN determines that the connection between itself (ie, GGSN) and the RNC is abnormal.

306. The GGSN aggregates the connection between the GGSN and the RNCs, and obtains the connection status information between the GGSN and each RNC, and reports the connection status information between the GGSN and each RNC as a detection result. Give the OSS system.

307. The OSS system receives the connection status information between the GGSN reported by the GGSN and each RNC, and updates the domain name record on the DNS system according to the connection status information between the received GGSN and the RNC:

(1) If the received connection state information indicates that the connection state between the RNC and the GGSN is normal, the domain name record is kept unchanged. (2) If the received connection status information indicates that the connection status between the RNC and the GGSN is abnormal, the IP address of the GGSN in the corresponding domain name record is cleared.

308. In the process of establishing a user session, when the SGSN selects the GGSN for the user, the SGSN sends a domain name resolution request with a direct tunnel identifier to the DNS system. The domain name includes:

(1) APN, used to identify GGSN

(2) RNC ID or Routing Area Code, used to identify RNC

309. The DNS system queries the domain name record according to the received domain name resolution request with the direct tunnel identifier, and then returns the IP address result of the GGSN corresponding to the domain name to the SGSN, as follows:

(1) If the connection status between the RNC and the GGSN is abnormal, the IP address returned by the DNS system is null, then step 310 can be performed;

(2) If the connection status between the RNC and the GGSN is normal, the IP address returned by the DNS system is not empty, that is, the IP address result of the GGSN corresponding to the domain name is returned, and the SGSN receives the IP address result that is not null. After that, a direct tunnel is established according to the result of the IP address;

310. The SGSN sends a domain name resolution request without a direct tunnel identifier to the DNS system.

311. After receiving the domain name resolution request without the direct tunnel identifier, the DNS system queries the domain name record according to the domain name resolution request without the direct tunnel identifier, and returns the IP address result of the GGSN corresponding to the domain name to the SGSN.

After receiving the IP address result, the SGSN does not enable the direct tunnel, but establishes a common two-stage tunnel for the user, that is, establishes a tunnel to the RNC and establishes a tunnel to the GGSN according to the IP address result.

It can be seen that the SGSN in this embodiment sends a domain name resolution request with a direct tunnel identifier to the DNS system, and after receiving the IP address result of the GGSN corresponding to the domain name returned by the DNS system, and then determining whether to enable the IP address result according to the result of the IP address. A direct tunnel, that is, if the IP address result is not empty, it indicates that the direct tunnel is enabled when the connection state between the RNC and the GGSN is normal. Otherwise, if the IP address result is empty, it indicates between the RNC and the GGSN. The connection status is abnormal, so it is determined that a common two-stage tunnel needs to be established. Since the solution will be related to the establishment of a direct tunnel, that is, the connection state between the RNC and the GGSN is a condition for enabling the direct tunnel, and thus compared with the prior art. Word, can For more flexible and effective control of whether direct tunneling is enabled. Embodiment 4

The same as the implementation of the second embodiment, in the embodiment, the RNC is also used as the network topology information execution unit of the network topology information processing device. Unlike the implementations 2 and 3, in this embodiment, the SGSN integrates the network extension. The function of the network information using the device, the network topology information collecting unit of the network topology information processing device, and the network topology information distributing unit. As shown in Figure 4, the specific process can be as follows:

401. The SGSN sends a radio network resource allocation request to the RNC, where the radio network resource allocation request carries the IP address of the GGSN. It should be noted that before the WLAN resource allocation request is sent to the RNC, the SGSN has communicated with the GGSN, but only the SGSN has not determined whether to establish a direct tunnel. Therefore, the SGSN can know the IP address of the GGSN.

402. After receiving the RRC resource allocation request, the RNC performs a connection state determination according to the IP address of the GGSN, that is, performs GTP path detection. For example, the RNC sends a GTPv1 message, such as an Echo Request message, to the GGSN corresponding to the IP address of the GGSN.

403. If the connection status between the RNC and the GGSN IP address is normal, the GGSN returns an Echo Response message after receiving the Echo Request message sent by the RNC; otherwise, if the connection status between the RNC and the GGSN IP address is abnormal, the GGSN The Echo Request message sent by the RNC cannot be received, so that the GGSN does not return the Echo Response message to the RNC. Therefore, if the RNC does not receive the Echo Response message from the GGSN, the RNC can determine itself (ie, RNC) and the GGSN IP address. The connection between the two is broken. Of course, the RNC can also perform path detection on each GGSN connected to itself, and save the connection status as a detection result. After receiving the wireless network resource allocation request, the RNC can directly query the corresponding according to the wireless network resource allocation request. The detection result is recorded without path detection based on the radio network resource allocation request, and therefore steps 402 and 403 are optional steps.

404. If the RNC determines that the connection state between the self (ie, the RNC) and the IP address of the GGSN is normal, the RNC returns a successful wireless network resource allocation response to the SGSN, and after the SGSN receives the wireless network resource allocation response, the RNC and the RNC The direct tunnel between the GGSNs is successfully established. The process ends. Otherwise, if the RNC determines that the connection status between itself (ie, RNC) and the IP address of the GGSN is abnormal, the RNC returns a failure indicating a radio network resource allocation response message to the SGSN, indicating a path between the SGSN RNC and the IP address of the GGSN. If not, step 405 can be performed.

405. The SGSN may resend the radio network resource allocation request to the RNC, where the radio network resource allocation request carries the IP address of the SGSN.

406. After receiving the radio network resource allocation request that carries the IP address of the SGSN, the RNC returns a radio network resource allocation response to the SGSN according to the IP address of the SGSN. After receiving the radio network resource allocation response, the SGSN establishes between the RNC and the SGSN. And a common two-stage tunnel between the SGSN and the GGSN. At this time, the SGSN may also record information indicating that the connection status between the RNC and the GGSN is abnormal, and start a timer. The direct tunnel is not started between the RNC and the GGSN within a preset time of the timer. Of course, the premise is that a timer needs to be set inside the SGSN. Of course, in order to release the storage space, after the time preset by the timer expires, the SGSN can directly clear the recorded information indicating that the connection status between the RNC and the GGSN is abnormal.

407. Optionally, after the time preset by the timer expires, the SGSN may further request the RNC to detect the IP address of the GGSN, that is, the SGSN may also send a request for detecting the IP address of the GGSN to the RNC.

408. After receiving the request for detecting the IP address of the GGSN, the RNC performs GTP path detection according to the IP address of the GGSN. For example, the RNC sends a GTPv1 message, such as an Echo Request message, to the GGSN corresponding to the IP address of the GGSN.

409. If the connection status between the RNC and the GGSN IP address is normal, the GGSN may return an Echo Response to the RNC; otherwise, the GGSN does not return an Echo Response to the RNC; therefore, if the RNC receives the Echo Response returned by the GGSN, the RNC determines The connection state between the self (ie, RNC) and the GGSN IP address is normal. If the RNC does not receive the Echo Response returned by the GGSN, the RNC determines that the connection between itself (ie, the RNC) and the IP address of the GGSN is abnormal.

The 4ia RNC reports the detection result, that is, the connection status information between the RNC and the GGSN to the SGSN. After receiving the connection status information between the GGSN and the RNC, the SGSN may determine whether the direct tunnel is enabled for the user, and may determine according to the connection status information, as follows: The received connection status information indicates between the RNC and the GGSN. The connection status is normal, allowing subsequent direct tunnels to be enabled. In subsequent processes, the SGSN can enable direct tunneling for users if direct tunneling is required for the user.

The received connection status information indicates that the connection status between the RNC and the GGSN is abnormal, and the timer is continued to be started. In the subsequent process, if it is determined whether the direct tunnel is enabled for the user, the SGSN does not enable the direct tunnel for the user. Instead, two ordinary tunnels are established, that is, two tunnels arriving at the RNC and the GGSN are respectively established.

It can be seen that the SGSN in this embodiment sends a radio network resource allocation request that carries the IP address of the GGSN to the RNC, and then receives the radio network resource allocation response returned by the RNC according to the IP address of the GGSN, according to the wireless network resource allocation response. The network resource allocation response determines whether to enable the direct tunnel, that is, if the wireless network resource allocation response indicating success is received, the direct tunnel is enabled, and if the wireless network resource allocation response indicating the failure is received, the ordinary two-stage tunnel is established. Since the solution will be related to the establishment of a direct tunnel, that is, the connection state between the RNC and the GGSN as a condition for enabling direct tunneling, it is possible to more flexibly and efficiently enable direct tunneling as compared with the prior art. control. Embodiment 5

In order to better implement the above method, the embodiment of the present invention further provides a network extension information using device 500, as shown in FIG. 5 (a), FIG. 5 (b) and FIG. 5 (c), the network The topology information using device 500 includes an obtaining unit 501 and a first processing unit 502;

The obtaining unit 501 is configured to acquire network topology information.

The first processing unit 502 is configured to determine, according to the network topology information acquired by the obtaining unit 501, that the connection state between the wireless network controller RNC and the gateway general packet radio service support node GGSN is normal, and enable the direct tunnel;

As shown in FIG. 5 (a), FIG. 5 (b), and FIG. 5 (c), the network topology information using device 500 may further include a second processing unit 503;

The second processing unit 503 is configured to determine, according to the network topology information acquired by the obtaining unit 501, that the connection state between the RNC and the GGSN is abnormal, establish a tunnel that reaches the RNC, and establish a tunnel that reaches the GGSN. Generally, the network topology information using device 500 may specifically be an SGSN.

(1) Referring to FIG. 5 (a), the network topology information collection unit and the network topology information distribution unit of the network topology information processing device may be specifically the OSS system A900, and the network topology information execution unit of the network topology information processing device. Specifically, it may be an RNC, and the network topology information using device 500 may specifically be an SGSN, and the respective units in the network topology information using device 500 may specifically be as follows:

It should be noted that, for the sake of clarity, the OSS system A900 is also shown in Figure 5 (a). The obtaining unit 501 is specifically configured to receive connection state information between the RNC and the GGSN sent by the OSS system A900.

The first processing unit 502 is specifically configured to determine that the connection status information received by the obtaining unit 501 indicates that the direct connection is enabled when the connection status between the RNC and the GGSN is normal.

The second processing unit 503 is specifically configured to determine that the connection status information received by the obtaining unit 501 indicates that the connection status between the RNC and the GGSN is abnormal, establish a tunnel to the RNC, and establish a tunnel to reach the GGSN.

At this time, as shown in FIG. 5(a), the network topology information using device 500 may further include a first receiving unit A504 and a first sending unit A505.

The first receiving unit A504 is configured to receive, by the OSS system A900, a request for an Internet Protocol IP address of the GGSN to be detected;

The first sending unit A505 is configured to return, according to the request received by the first receiving unit A504, the IP address list of the GGSN to be detected to the OSS system A900, so that the OSS system A900 collects connection state information between the RNC and the GGSN according to the list.

(2) Referring to FIG. 5 (b), the network topology information collection unit of the network topology information processing device may be an OSS system, and the network topology information execution unit of the network topology information processing device may be a GGSN, a network topology. The network topology information distribution unit of the information processing device may be specifically a DNS system B900, and the network topology information usage device 500 may be an SGSN. The specific units in the network topology information usage device 500 may be specifically as follows:

It should be noted that for the sake of clarity, the DNS system B900 is also shown in Figure 5 (b). The obtaining unit 501 may include a domain name resolution request subunit B5011 and an address result receiving subunit B5012;

The domain name resolution request sub-unit B5011 is configured to send a direct tunnel identifier to the DNS system B900. The address result receiving sub-unit B5012 is configured to receive an IP address result of the GGSN corresponding to the domain name returned by the DNS system B900 according to the domain name resolution request received by the domain name resolution request sub-unit B5011 after querying the domain name record;

At this time, the first processing unit 502 is specifically configured to enable a direct tunnel according to the IP address result when the IP address result received by the address result receiving subunit B5012 is not empty;

The second processing unit 503 is specifically configured to: when the IP address result received by the address result receiving subunit B5012 is null, send a domain name resolution request without a direct tunnel identifier, and receive an IP of the GGSN corresponding to the domain name returned by the DNS system. The result of the address is then established based on the result of the IP address to establish a tunnel to the RNC and establish a tunnel to the GGSN.

At this time, as shown in FIG. 5(b), the network topology information using device 500 may further include a second receiving unit B504 and a second sending unit B505;

a second receiving unit B504, configured to receive, by the OSS system, a request for an IP address of the RNC to be detected;

The second sending unit B505 is configured to return, according to the request received by the second receiving unit B504, the IP address list of the RNC to be detected to the OSS system, so that the OSS system collects the connection status information between the RNC and the GGSN according to the list, and then updates Domain name record in DNS system B900.

(3) Referring to FIG. 5 (c), the network topology information execution unit of the network topology information processing device may specifically be an RNC, and the network topology information using device 500 and the network topology information collecting unit of the network topology information processing device And the network topology information distribution unit may be specifically integrated in the SGSN. In this case, each unit in the network topology information using device 500 may specifically be as follows:

The obtaining unit 501 may include a resource allocation request subunit C5011 and an allocation response receiving subunit C5012;

a resource allocation request sub-unit C5011, configured to send a radio network resource allocation request to the RNC, where the radio network resource allocation request carries an IP address of the GGSN;

The allocation response receiving subunit C5012 is configured to receive the wireless network resource returned by the RNC according to the IP address of the GGSN received by the resource allocation request subunit C5011.

At this time, the first processing unit 502 is specifically configured to enable the direct tunnel when the allocation response receiving subunit C5012 receives the wireless network resource allocation response indicating success;

The second processing unit 503 is specifically configured to receive the indication loss in the allocation response receiving subunit C5012. When the failed wireless network resource allocation response, a tunnel to the RNC is established and a tunnel to the GGSN is established.

In order to save the signaling process in the system, as shown in FIG. 5(c), the network topology information using device 500 may further include a third processing unit C504;

The third processing unit C504 is configured to: when the allocation response receiving subunit C5012 receives the wireless network resource allocation response indicating the failure, record the abnormal connection status between the RNC and the GGSN, and start a timer, which is preset by the timer. During the set time, no direct tunnel is initiated between the RNC and the GGSN. Of course, in order to release the storage space, after the time preset by the timer expires, the SGSN can also directly clear the recorded information indicating that the connection status between the RNC and the GGSN is abnormal.

Further, the network topology information using device 500 further includes a fourth processing unit C505;

a fourth processing unit C505, configured to send a request for detecting an IP address of the GGSN to the RNC after the time preset by the timer started by the third processing unit C504 is timed out; receive the detection result returned by the RNC; if the detection result indicates If the connection status between the RNC and the GGSN address is normal, the direct tunnel is allowed to be enabled later. If the detection result indicates that the connection status between the RNC and the GGSN address is abnormal, the timer is continued.

For the specific implementation of the above various units, refer to the foregoing method embodiments, and details are not described herein again. It can be seen that the obtaining unit 501 of the network topology information using device 500 of the present embodiment can obtain the network topology information, and then decide whether to enable the direct tunnel according to the network topology information, that is, determine the connection state between the RNC and the GGSN. Normally, the first processing unit 502 enables the direct tunnel. On the other hand, if it is determined that the connection state between the RNC and the GGSN is abnormal, the second processing unit 503 establishes a normal two-stage tunnel, because the scheme will establish a direct tunnel. Related factors, such as dynamic network topology information as a condition for enabling direct tunneling, can control the direct tunneling more flexibly and effectively than the prior art. Embodiment 6

Correspondingly, the embodiment of the present invention further provides a network topology information processing device. As shown in FIG. 6( a ), FIG. 6 ( b ) and FIG. 6 ( b ), the network topology information processing device may include a network extension. a simple information execution unit 601, a network topology information collection unit 602, and a network topology information distribution unit 603;

The network topology information execution unit 601 is configured to perform network topology information detection, obtain network topology information detection result, and report network topology information detection result to the network topology information collection unit 602.

The network topology information collecting unit 602 is configured to receive the report reported by the network topology information execution unit 601. The network topology information detection result is updated, and the network topology information saved by the network topology information distribution unit 603 is updated according to the received network topology information detection result;

The network topology information distribution unit 603 is configured to provide the updated network topology information to the network topology information using device.

(1) Referring to FIG. 6 (a), the network topology information execution unit 601 is specifically a radio network controller RNC. At this time, the network topology information execution unit 601 may include a first probe subunit A6011 and a first summary subunit A6013. And the first reporting subunit A6013;

The first detecting sub-unit A6011 is configured to separately send a response request to each GGSN, and if receiving the response response returned by the GGSN, determine that the connection between the RNC and the GGSN is normal, and if the response response returned by the GGSN is not received, determine The connection between the RNC and the GGSN is abnormal.

The first summary sub-unit A6012 is configured to perform a summary according to the connection between the RNC and each GGSN determined by the first detecting sub-unit A6011, to obtain a detection result of the IP address of the GGSN;

The first reporting sub-unit A6013 is configured to report the detection result of the IP address of the GGSN obtained by the first summary sub-unit A6012 to the network topology information collecting unit 602.

At this time, the network topology information collecting unit 602 may include a first receiving subunit A6021 and a first updating subunit A6022;

The first receiving sub-unit A6021 is configured to receive the network topology information executing unit 601, for example, the first first update sub-unit A6022, configured to update the network topology information according to the IP address result of the GGSN received by the first receiving sub-unit A6021. Connection status information between the RNC and the GGSN held by the distribution unit 603

The network topology information distribution unit 603 is configured to send connection state information between the updated RNC and the GGSN of the first update subunit A6022 to the network topology information using device.

(2) Referring to FIG. 6 (b), the network topology information execution unit 601 is specifically a GGSN. At this time, the network topology information execution unit 601 may include a second probe sub-unit B6011 and a second summary sub-unit B6012 and a second report. Subunit B6013;

The second detecting sub-unit B6011 is configured to separately send a response request to each RNC, and if receiving the response response returned by the RNC, determine that the connection between the GGSN and the RNC is normal, and if the response response returned by the RNC is not received, determine The connection between the GGSN and the RNC is abnormal;

a second summary sub-unit B6012, configured to determine the GGSN according to the second detection sub-unit B6011 The connection status with each RNC is summarized, and the connection status information between the GGSN and each RNC is obtained;

The second reporting sub-unit B6013 is specifically configured to report the connection status information between the GGSN obtained by the second summary sub-unit B6012 and each RNC to the network topology information collecting unit 602.

At this time, the network topology information collecting unit 602 may include a second receiving subunit B6021 and a second updating subunit B6022;

The second receiving sub-unit B6021 is configured to receive the network topology information executing unit 601, and specifically, the second update sub-unit B6022, configured to update the connection status information between the GGSN and each RNC received by the second receiving sub-unit B6021. The domain name record held by the network topology information distribution unit 603;

The network topology information distribution unit 603 is configured to: when receiving the domain name resolution request with the direct tunnel identifier sent by the network topology information using device, send the IP address result of the GGSN corresponding to the domain name to the network topology according to the updated domain name record Information is used by the device.

(3) Referring to FIG. 6 (c), the network topology information execution unit 601 may specifically be an RNC, and the network topology information receiving unit 602 and the network topology information distribution unit 603 may be integrated into the network topology information using device 500. In this case, the network topology information execution unit 601 may include a receiving subunit C6011, a third detecting subunit C6012, and a third reporting subunit C6013;

The receiving sub-unit C6011 is configured to receive a radio network resource allocation request sent by the network topology information using the device, where the radio network resource allocation request carries the IP address of the GGSN;

The third detecting sub-unit C6012 is configured to send a response request to the GGSN according to the IP address of the GGSN received by the receiving sub-unit C6011. If the response response returned by the GGSN is received, it is determined that the connection between the RNC and the GGSN is normal, if not received. Responding to the response returned by the GGSN, determining that the connection between the RNC and the GGSN is abnormal;

The third reporting sub-unit C6013 is specifically configured to: when the third detecting sub-unit C6012 determines that the connection between the RNC and the GGSN is normal, return a successful wireless network resource allocation response to the network topology information using device; When the unit determines that the connection between the C6012 RNC and the GGSN is abnormal, the unit returns a failure indicating the wireless network resource allocation response to the network topology information using device.

For the specific implementation of the above various units, refer to the foregoing embodiments, and details are not described herein again.

It can be seen from the above that the network topology information execution unit of the network topology information processing device of this embodiment The 601 can detect the network topology information, and report the network topology information detection result to the network topology information collection unit 602. The network topology information collection unit 602 saves the network topology saved by the network topology information distribution unit 603. The information is updated, and when the network topology information usage device needs to determine whether to enable the direct tunnel, the network topology information distribution unit 603 sends the network topology information to the network topology information using device, so that the network topology information using device Determining whether to enable the direct tunnel according to the network topology information. Since the solution will be related to establishing a direct tunnel, for example, the dynamic network topology information is used as a condition for enabling direct tunneling, therefore, compared with the prior art, It is more flexible and efficient to control whether direct tunneling is enabled. Example VII.

Correspondingly, the embodiment of the present invention further provides a communication system. As shown in FIG. 7, the communication system includes a network topology information using device 500 and a network topology information processing device 600;

The network topology information using device 500 is configured to obtain the network topology information from the network topology information processing device 600, and determine that the connection state between the RNC and the GGSN is normal according to the obtained network topology information, and enable the direct tunnel;

The network topology information processing device 600 is configured to collect network topology information, and send network topology information to the network topology information using device 500.

In another embodiment of the invention,

The network topology information using device 500 is further configured to determine, when the connection state between the RNC and the GGSN is abnormal according to the obtained network topology information, establish a tunnel to the RNC and establish a tunnel to reach the GGSN.

The network topology information using device 500 may be any network topology information using device provided by the embodiment of the present invention. The network topology information processing device 600 may be any network topology information processing provided by the embodiment of the present invention. For details, refer to the previous embodiment, and details are not described herein again.

The execution flow of the communication system will be briefly described below by way of example.

(1) Example 1

It is assumed that the OSS system is used as the network topology information collection unit and the network topology information distribution unit of the network topology information processing device 600, and the RNC is used as the network topology information execution unit of the network topology information processing device 600 as the network topology. The information using device 50 (3⁄4) may be as follows: Step A1, the OSS system sends a request for the IP address of the GGSN to be probed to the SGSN. Step A2: The SGSN reports the IP address list of the GGSN to be probed to the OSS system according to the received request. Step A3: The OSS system requests the RNC to detect the IP address of the GGSN according to the IP address list of the GGSN that needs to be detected.

Step A4: The RNC sends a GTPv1 to the IP address of each GGSN. For example, Echo Request Step A5. If the connection between the GGSN and the RNC is normal, the GGSN may return an Echo Response to the RNC. Otherwise, if the RNC does not receive the Echo Response message returned by the GGSN. Then, the RNC determines that the connection between the self (ie, RNC) and the GGSN is abnormal.

Step A6: The RNC summarizes the connection between itself (ie, RNC) and the IP address of each GGSN, and reports it to the OSS system to update the connection status information between the RNC and the GGSN saved by the OSS system.

Step A7: The OSS system sends the connection status information between the updated GGSN and the RNC to the SGSN.

When the SGSN needs to determine whether to enable direct tunneling for the user, it can judge based on these connection status information, as follows:

If the received connection status information indicates that the connection status between the RNC and the GGSN is normal, the direct tunnel can be enabled for the user. If the received connection status information indicates that the connection status between the RNC and the GGSN is abnormal, the direct tunnel is not enabled for the user, but the tunnel to the RNC is established and the tunnel to the GGSN is established.

(2) Example 2

It is assumed that the OSS system is used as the network topology information collection unit of the network topology information processing device 600, and the GGSN is used as the network topology information execution unit of the network topology information processing device 600, and the DNS system is used as the network topology information processing device 600. The network topology information distribution unit uses the SGSN as the network topology information using device 500. In addition, the DNS system is configured with a domain name record with a direct tunnel identifier. In addition to the direct tunnel identifier, the domain name includes the APN and the RNC ID or Routing. Area Code; The specific process can be as follows:

Step B1: The OSS system sends a request for the IP address of the RNC to be probed to the SGSN. Step B2: The SGSN reports the IP address of the RNC to be probed to the OSS system according to the received request. A list of addresses. Step B3: The OSS system requests the GGSN to detect the IP address of the RNC according to the IP address list of the RNC that needs to be detected. Step B4 The GGSN sends a GTPv1 message, such as an Echo Request message, to the IP address of each RNC. Step If the connection between the GGSN and the RNC is normal, the RNC may return an Echo Response message. Otherwise, if the GGSN does not receive the Echo Response message returned by the RNC, the B' GGSN determines that the connection between itself (ie, GGSN) and the RNC is abnormal. Step B6: The GGSN aggregates the connection status between itself (ie, GGSN) and the IP address of each RNC, and reports it to the OSS system. Step B7: The OSS system updates the domain name record on the DNS system according to the received connection status information between the GGSN and the RNC, as follows: If the received connection status information indicates that the connection status between the RNC and the GGSN is normal, the domain name record is maintained. constant. If the received connection status information indicates that the connection status between the RNC and the GGSN is abnormal, the IP address of the GGSN in the corresponding domain name record is cleared. In step B8, when the SGSN selects the GGSN for the user, the SGSN sends a domain name resolution request with a direct tunnel identifier to the DNS system. Step B9: The DNS system receives the domain name resolution request with the direct tunnel identifier. Query the domain name record, and then return the IP address result of the GGSN corresponding to the domain name to the SGSN, as follows: If the connection status between the RNC and the GGSN is abnormal, the IP address returned by the DNS system is null, and step B 10 can be performed; If the connection status with the GGSN is normal, the IP address returned by the DNS system is not empty, that is, the IP address result of the GGSN corresponding to the domain name is returned, and the SGSN establishes a direct tunnel according to the IP address result; Step B10, SGSN sends without The domain name resolution request of the direct tunnel identifier is given to the DNS system. Step B11: The DNS system queries the domain name according to the domain name resolution request without the direct tunnel identifier. Record, return the IP address result of the GGSN corresponding to the domain name to the SGSN;

After receiving the IP address result, the SGSN does not enable the direct tunnel, but establishes a tunnel to the RNC and establishes a tunnel to the GGSN based on the IP address result.

(3) Example 3

It is assumed that the RNC is used as the network topology information execution unit of the network topology information processing device 600, and the SGSN is used as the network topology information using device 500, the network topology information collecting unit of the network topology information processing device 600, and the network topology information distribution. Unit, the specific process can be as follows:

Steps: The SGSN sends a radio network resource allocation request to the RNC, where the radio network resource allocation request carries the IP address of the GGSN. Step C2: The RNC sends a GTPv1 message to the GGSN corresponding to the IP address of the GGSN, such as an Echo Request message. Step C3: If the connection status between the RNC and the GGSN IP address is normal, the GGSN will return an Echo Response message to the RNC; otherwise, if the connection status between the RNC and the GGSN IP address is abnormal, the GGSN does not return an Echo Response message to RNC.

Step C4: If the RNC receives the Echo Response message returned by the GGSN, the RNC returns a successful wireless network resource allocation response to the SGSN. After the SGSN receives the wireless network resource allocation response, the direct tunnel between the RNC and the GGSN is successfully established. The process ends. Otherwise, if the RNC does not receive the Echo Response message returned by the GGSN, the RNC returns a failed wireless network resource allocation response message to the SGSN, indicating that the path between the SGSN RNC and the IP address of the GGSN is unreachable, and step C5 may be performed. . Step C5: The SGSN may resend the wireless network resource allocation request to the RNC, where the wireless network resource allocation request carries the IP address of the SGSN.

The RNC returns a radio network resource allocation response to the SGSN according to the IP address of the SGSN. After receiving the radio network resource allocation response, the SGSN establishes a common two-stage tunnel between the RNC and the SGSN and between the SGSN and the GGSN. At this time, the SGSN may also record information indicating that the connection state between the RNC and the GGSN is abnormal, and start a timer. The direct tunnel is not started between the RNC and the GGSN within a preset time of the timer. Of course, the premise is that a timer needs to be set inside the SGSN. Of course, in order to release the storage space, after the time preset by the timer expires, the SGSN may also directly clear the recorded information indicating that the connection status between the RNC and the GGSN is abnormal. Step C7. Optionally, after the time preset by the timer expires, the SGSN may further request the RNC to detect the IP address of the GGSN. Step C8: The RNC sends an Echo Request message to the GGSN corresponding to the IP address of the GGSN. Step C9: If the RNC receives the Echo Response returned by the GGSN, the RNC determines that the connection state between the GGSN and the GGSN is normal. If the RNC does not receive the Echo Response returned by the GGSN, the RNC determines the IP address of the GGSN. An abnormal connection occurred between the connections. Step Cia RNC reports the connection status information between itself and the GGSN IP address to the SGSN.

After receiving the connection status information between the GGSN and the RNC, the SGSN may determine whether the direct tunnel is enabled for the user, and may determine according to the connection status information, as follows: The received connection status information indicates between the RNC and the GGSN. If the connection status is normal, it means that when it is necessary to determine whether the direct tunnel is enabled for the user, the SGSN can enable direct tunneling for the user. The received connection status information indicates that the connection status between the RNC and the GGSN is abnormal, and the timer is continuously enabled, indicating that when it is required to determine whether the direct tunnel is enabled for the user, the SGSN does not enable the direct tunnel for the user, but establishes a tunnel to the RNC. And establish a tunnel to the GGSN.

It can be seen that the network topology information processing device 600 of the communication system of the present embodiment can collect dynamic network topology information, and the network topology information using device 500 needs to determine whether to enable the direct tunnel when the network is used. 500, the network topology information using device 500 can determine whether to enable the direct tunnel according to the network topology information, that is, when determining that the connection state between the RNC and the GGSN is normal, the direct tunnel is enabled, and if not, the RNC and the GGSN are determined. If the connection status is abnormal, a normal two-segment tunnel is established. Since the solution will be related to the establishment of a direct tunnel, such as dynamic network topology information as a condition for enabling direct tunneling, it is relative to the prior art. In other words, it is more flexible and effective to control whether or not direct tunneling is enabled. A person of ordinary skill in the art may understand that all or part of the steps of the foregoing embodiments may be performed by a program to instruct related hardware. The program may be stored in a computer readable storage medium, and the storage medium may include: Read Only Memory (ROM), Random Access Memory (RAM), disk or optical disk.

The method, device and communication system for controlling a direct tunnel provided by an embodiment of the present invention are Detailed introduction,

The description of the above embodiments is only for helping to understand the method of the present invention and its core ideas; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in specific embodiments and applications. In the above, the contents of this specification are not to be construed as limiting the invention.

Claims

Claim

A method for controlling a direct tunnel, comprising:

Obtain network topology information;

The direct tunnel is enabled when the connection state between the radio network controller RNC and the gateway general packet radio service support node GGSN is normal according to the obtained network topology information.

2. The method according to claim 1, further comprising:

Based on the obtained network topology information, when the connection state between the RNC and the GGSN is abnormal, a tunnel to the RNC is established and a tunnel to the GGSN is established.

The method according to claim 1, wherein when the acquiring network topology information comprises: receiving connection state information between an RNC and a GGSN sent by an operation support system OSS system; The information further includes: receiving a request sent by the OSS system for the Internet Protocol IP address of the GGSN to be detected; and returning the IP address list of the GGSN to be detected to the OSS system according to the received request, so that the OSS system collects according to the list. Connection status information between the RNC and the GGSN.

The method according to claim 2, wherein the obtaining the network topology information comprises: sending a domain name resolution request with a direct tunnel identifier to the domain name system DNS system, and the receiving DNS system returns by querying the domain name record. The domain name corresponds to the IP address of the GGSN when it results;

When the connection status between the RNC and the GGSN is normal according to the obtained network topology information, enabling the direct tunnel includes: if the received IP address result is not empty, enabling the direct tunnel according to the IP address result; or

When the connection status between the RNC and the GGSN is abnormal according to the obtained network topology information, the two tunnels that reach the RNC and the GGSN respectively are: if the received IP address result is empty, the sending does not have a direct The domain name resolution request of the tunnel identifier, and receiving the IP address result of the GGSN corresponding to the domain name returned by the DNS system, and then establishing a tunnel to the RNC and establishing a tunnel to the GGSN according to the IP address result.

The method according to claim 4, wherein before the sending the domain name resolution request with the direct tunnel identifier to the DNS system, the method further includes:

Receiving a request sent by the OSS system regarding an IP address of the RNC to be probed;

Returning the IP address list of the RNC to be probed to the OSS system according to the received request, so that the OSS system updates the domain name in the DNS system after collecting the connection state information between the RNC and the GGSN according to the list. Record.

The method according to claim 2, wherein the acquiring the network topology information comprises: sending a radio network resource allocation request to the RNC, where the radio network resource allocation request carries an IP address of the GGSN; receiving the RNC When the wireless network resource allocation response returned after the connection state determination is performed according to the IP address of the GGSN;

When the connection status between the RNC and the GGSN is determined according to the obtained network topology information, enabling the direct tunnel includes: if a wireless network resource allocation response indicating success is received, enabling the direct tunnel; or

When determining, according to the obtained network topology information, that the connection status between the RNC and the GGSN is abnormal, respectively establishing two tunnels that reach the RNC and the GGSN includes: if the wireless network resource allocation response indicating the failure is received, establishing the arrival RNC Tunnel and establish a tunnel to the GGSN.

The method according to claim 6, wherein the receiving the wireless network resource allocation response indicating the failure further comprises:

A message indicating that the connection status between the RNC and the GGSN is abnormal is generated, and a timer is started, and a direct tunnel is not initiated between the RNC and the GGSN within a preset time of the timer.

The method according to claim 7, wherein after the time preset by the timer expires, the method further includes:

Clears the recorded information indicating that the connection status between the RNC and the GGSN is abnormal.

Send a request for detecting the IP address of the GGSN to the RNC;

Receiving the detection result returned by the RNC;

If the detection result indicates that the connection status between the RNC and the GGSN address is normal, then the direct tunnel is allowed to be subsequently enabled;

If the detection result indicates that the connection status between the RNC and the GGSN address is abnormal, the timer is continuously started.

10. A network topology information using device, comprising:

An obtaining unit, configured to obtain network topology information;

a first processing unit, configured to determine, when the connection status between the radio network controller RNC and the gateway general packet radio service support node GGSN is normal according to the network topology information acquired by the acquiring unit, enable Direct tunnel.

The network topology information using device according to claim 10, further comprising: a second processing unit, configured to determine, according to the network topology information acquired by the acquiring unit, that the connection state between the RNC and the GGSN is abnormal. At the time, a tunnel to the RNC is established and a tunnel to the GGSN is established.

The network topology information using device according to claim 11, further comprising a first receiving unit and a first sending unit;

The acquiring unit is configured to receive connection state information between the RNC and the GGSN sent by the OSS system of the operation support system;

The first processing unit is configured to determine that the connection state information received by the acquiring unit indicates that the connection state between the RNC and the GGSN is normal, and the direct tunnel is enabled;

The second processing unit is configured to: when the connection state information received by the acquiring unit indicates that the connection state between the RNC and the GGSN is abnormal, establish a tunnel that reaches the RNC and establish a tunnel that reaches the GGSN; and the first receiving unit is configured to receive A request sent by the OSS system regarding the Internet Protocol IP address of the GGSN to be probed;

The first sending unit is configured to return, according to the request received by the first receiving unit, the IP address list of the GGSN to be detected to the OSS system, so that the OSS system collects the connection state information between the RNC and the GGSN according to the list.

The network topology information using device according to claim 11, wherein the obtaining unit comprises a domain name resolution request subunit and an address result receiving subunit;

a domain name resolution request sub-unit, configured to send a domain name resolution request with a direct tunnel identifier to the domain name system DNS system;

The address result receiving subunit is configured to receive an IP address result of the GGSN corresponding to the domain name returned by the DNS system according to the domain name resolution request received by the domain name resolution request subunit, and the first processing unit is used for the address If the result of the IP address received by the receiving subunit is not empty, the direct tunnel is enabled according to the result of the IP address;

The second processing unit is configured to: when the IP address result received by the address result receiving subunit is null, send a domain name resolution request without a direct tunnel identifier, and receive an IP address of the GGSN corresponding to the domain name returned by the DNS system. As a result, a tunnel to the RNC and a tunnel to the GGSN are established based on the IP address result.

The network topology information using device according to claim 13, further comprising a second receiving unit and a second transmitting unit;

a second receiving unit, configured to receive, by the OSS system, a request for an IP address of the RNC to be detected;

a second sending unit, configured to return, according to the request received by the second receiving unit, the IP address list of the RNC to be detected to the OSS system, so that the OSS system collects the connection status information between the RNC and the GGSN according to the list, and then updates the DNS system. The domain name record in .

The network topology information using device according to claim 11, wherein the obtaining unit comprises a resource allocation request subunit and an allocation response receiving subunit;

a resource allocation requesting sub-unit, configured to send a radio network resource allocation request to the RNC, where the radio network resource allocation request carries an IP address of the GGSN;

And an allocation response receiving subunit, configured to receive a radio network resource allocation response returned by the RNC according to the IP address of the GGSN received by the resource allocation request subunit;

The first processing unit is configured to enable a direct tunnel when the allocation response receiving subunit receives the wireless network resource allocation response indicating success;

The second processing unit is configured to establish a tunnel to the RNC and establish a tunnel to reach the GGSN when the allocation response receiving subunit receives the wireless network resource allocation response indicating the failure.

The network topology information using device according to claim 15, further comprising a third processing unit;

a third processing unit, configured to: when the allocation response receiving subunit receives the wireless network resource allocation response indicating the failure, record the abnormal connection status between the RNC and the GGSN, and start a timer, which is preset by the timer During the time, a direct tunnel is not initiated between the RNC and the GGSN.

The network topology information using device according to claim 16, further comprising a fourth processing unit;

a fourth processing unit, configured to send a request for detecting an IP address of the GGSN to the RNC after the time preset by the timer started by the third processing unit expires; receiving a detection result returned by the RNC; if the detection result indicates the RNC and the If the connection status between the GGSN addresses is normal, the direct tunnel is allowed to be enabled subsequently. If the detection result indicates that the connection status between the RNC and the GGSN address is abnormal, the timer is continued.

18. A network topology information processing device, comprising:

The network topology information execution unit is configured to perform network topology information detection, obtain network topology information detection result, and report the network topology information detection result to the network topology information collection unit; The network topology information collecting unit is configured to receive the network topology information detection result reported by the network topology information execution unit, and update the network topology information saved by the network topology information distribution unit according to the received network topology information detection result;

The network topology information processing device according to claim 18, wherein the network topology information execution unit comprises a first probe subunit and a first summary subunit and a first report subunit; For sending a response request to each gateway general packet radio service support node GGSN, if receiving the response response returned by the GGSN, determining that the connection between the RNC and the GGSN is normal, and if the response response returned by the GGSN is not received, Determining a connection abnormality between the RNC and the GGSN;

a first summary sub-unit, configured to summarize, according to the connection between the RNC and each GGSN determined by the first detecting sub-unit, to obtain a detection result of the IP address of the GGSN;

The first reporting sub-unit is configured to report the detection result of the IP address of the GGSN obtained by the first summary sub-unit to the network topology information collecting unit.

The network topology information processing device according to claim 19, wherein the network topology information collecting unit comprises a first receiving subunit and a first updating subunit;

a first receiving subunit, configured to receive a detection result of an IP address of the GGSN reported by the network topology information execution unit;

a first update subunit, configured to update connection state information between the RNC and the GGSN saved by the network topology information distribution unit according to the IP address detection result of the GGSN received by the first receiving subunit; and the network topology information distribution And a unit, configured to send connection state information between the updated RNC and the GGSN of the first update subunit to the network topology information using device.

The network topology information processing device according to claim 18, wherein the network topology information execution unit comprises a second probe subunit and a second summary subunit and a second report subunit; the second probe subunit And sending a response request to each RNC separately, and if receiving the response response returned by the RNC, determining that the connection between the GGSN and the RNC is normal, and if not receiving the response response returned by the RNC, determining between the GGSN and the RNC The connection is abnormal;

a second summary subunit, configured to perform, according to the connection between the GGSN and each RNC determined by the second detecting subunit, obtain connection state information between the GGSN and each RNC; The second reporting sub-unit is specifically configured to report the connection status information between the GGSN and each RNC obtained by the second summary sub-unit to the network topology information collecting unit.

The network topology information processing device according to claim 21, wherein the network topology information collecting unit comprises a second receiving subunit and a second updating subunit;

a second receiving subunit, configured to receive connection state information between the GGSN reported by the network topology information execution unit and each RNC;

a second update subunit, configured to update the domain name record saved by the network topology information distribution unit according to the connection state information between the GGSN and each RNC received by the second receiving subunit;

The network topology information distribution unit is configured to: when receiving the domain name resolution request with the direct tunnel identifier sent by the network topology information using the device, send the IP address result of the GGSN corresponding to the domain name according to the updated domain name record to the network extension Park Information uses the device.

The network topology information processing device according to claim 18, wherein the network topology information execution unit comprises a receiving subunit, a third detecting subunit, and a third reporting subunit;

a receiving subunit, configured to receive a wireless network resource allocation request sent by the network topology information using the device, where the wireless network resource allocation request carries an Internet Protocol IP address of the GGSN;

The third detecting subunit is configured to send a response request to the GGSN according to the IP address of the GGSN received by the receiving subunit, and if the response response returned by the GGSN is received, determine that the connection between the RNC and the GGSN is normal, if the GGSN is not received. The returned response is determined to determine that the connection between the RNC and the GGSN is abnormal. The third reporting sub-unit is specifically configured to return to the network topology information using device when the third detecting sub-unit determines that the connection between the RNC and the GGSN is normal. Determining a successful wireless network resource allocation response; when the third detecting subunit determines that the connection between the RNC and the GGSN is abnormal, returning a failed wireless network resource allocation response to the network topology information using device.

A communication system, comprising: a network topology information using device and a network topology information processing device;

The network topology information using device is configured to obtain network topology information from the network topology information processing device, and determine, according to the obtained network topology information, a connection between the radio network controller RNC and the gateway general packet radio service support node GGSN. When the status is normal, the direct tunnel is enabled;

The network topology information processing device is configured to collect network topology information, and send network topology information to the network topology information using device.