WO2011147170A1

WO2011147170A1 - Method, apparatus and system for channel detection

Info

Publication number: WO2011147170A1
Application number: PCT/CN2010/079131
Authority: WO
Inventors: 刘和洋; 张美峰; 李成刚; 马彦强; 李明辉
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-05-28
Filing date: 2010-11-25
Publication date: 2011-12-01
Also published as: CN101895916A

Abstract

The present invention discloses a method, an apparatus and a system for channel detection, which belongs to data transmission field and solves the problem that the channel detection method in the prior art can not perform detection in a hybrid network. The method includes that: an upper-layer protocol detection message sent from a first transmission network is received through a channel to be detected, wherein the upper-layer protocol detection message is encapsulated in the encapsulation format of the first transmission network; the upper-layer protocol detection message is parsed, encapsulated in the encapsulation format of a second transmission network, and transmitted to the second transmission network through the channel to be detected. The technical solution of the present invention is suitable for a Universal Mobile Telecommunications System (UMTS) network.

Description

Channel detection method, device and system

Technical field

The present invention relates to the field of data transmission, and in particular, to a channel detection method, apparatus and system in a Universal Mobile Telecommunications System (UMTS) network. Background technique

With the evolution of the 3rd Generation Partnership Project (3GPP), Wideband Code Division Multiple Access (WCMDA) and Time Division Synchronous Code Division Multiple (Time Division- Synchronous Code Division Multiple) Access, TDSCDMA) transmission architecture is also gradually evolving to all IP: IUB, IUR, IUCS, NB and other interface transmissions are no longer purely Asynchronous Transfer Mode (ATM) / AAL2 or Internet Protocol (Internet Protocol, IP) / User Datagram Protocol (UDP), even an interface is composed of a mixture of ATM and IP, for example, the following IP and ATM transmission intermixed networking:

Network 1: Base station (NODEB) - ATM - Relay node 1 - IP - Relay node 2 - ATM - Radio Network Controller (RNC);

Network 2: NODEB - ATM - RNC - IP - RNC - ATM - Media GateWay, MGW.

In the case of hybrid networking, FMP/F5 OAM using traditional ATM or ICMP of IP cannot detect end-to-end (for example, RNC to NODEB in network 1) user transmission channel failure. (User Transport Channel: A logical channel used by a user in a voice/data communication process, which is established at the beginning of communication and released at the end of communication, the channel spanning the access network and core network of UMTS, at each network node The transport layer is identified by IP address + UDP port (PORT) or PORT + Virtual Path Identifier (VPI) + Virtual Channel Identifier (VCI) + Channel Flag (CID). Summary of the invention

The present invention provides a channel detection method, apparatus and system, which solves the problem that the existing channel detection method cannot detect the hybrid network.

A channel detection method includes:

Receiving, by the channel to be detected, an upper layer protocol detection packet sent by the first transmission network, where the upper layer protocol detection packet is encapsulated in an encapsulation format of the first transmission network;

The upper layer protocol detection packet is parsed and encapsulated in an encapsulation format of the second transmission network, and sent to the second transmission network via the to-be-detected channel.

The upper layer protocol detection packet is an application layer packet.

Before the step of receiving, by the to-be-detected channel, the upper layer protocol detection packet sent by the first transmission network, the method further includes:

Detecting the originating network node and transmitting the upper layer protocol detection message, and carrying the request for acquiring the node information of the target node of the peer to be detected in the message.

And the step of parsing the upper layer protocol detection packet and the encapsulation format of the second transmission network, and after the step of sending the to-be-detected channel to the second transmission network, the method further includes:

Receiving, by the to-be-detected channel, an upper layer protocol detection response message sent by the second transmission network, where the upper layer protocol detection response message is encapsulated in an encapsulation format of the second transmission network;

The upper layer protocol detection response message is parsed and encapsulated in an encapsulation format of the first transmission network, and sent to the first transmission network via the to-be-detected channel.

The upper layer protocol detection response message carries the node information of the destination network node, and the upper layer protocol detection response message is parsed and encapsulated in an encapsulation format of the first transmission network, and the channel to be detected is used. After the step of sending to the first transmission network, the method further includes:

The detection initiation network node receives the upper layer protocol detection response message, extracts node information of the destination network node from the message, and records the node information, the packet delay, and the number of detections.

The above channel detection method further includes:

Determining the quality and congestion status of the to-be-detected channel according to the node information, the message delay, and the number of detections. The invention also provides a network node, comprising:

a packet receiving module, configured to: receive, by the channel to be detected, an upper layer protocol detection packet sent by the first transmission network, where the upper layer protocol detection packet is encapsulated in an encapsulation format of the first transmission network;

The packet forwarding module is configured to: parse the upper layer protocol detection packet and encapsulate it in an encapsulation format of the second transmission network, and send the packet to the second transmission network via the to-be-detected channel.

The detection packet receiving module is further configured to: receive, by the to-be-detected channel, an upper layer protocol detection response message sent by the second transmission network, where the upper layer protocol detection response message is encapsulated in an encapsulation format of the second transmission network;

The detection packet forwarding module is further configured to: parse the upper layer protocol detection response message and encapsulate it in an encapsulation format of the first transmission network, and send the signal to the first transmission network via the to-be-detected channel.

The above network node also includes:

a detecting module, the detecting module is configured to: construct and send the upper layer protocol detection message, where the message carries a request for acquiring node information of a destination network node of the to-be-detected channel, and receives the upper layer protocol Detecting a response message, extracting node information of the destination network node from the message, and recording the node information, the packet delay, and the number of detections, and determining the to-be-waited according to the node information, the packet delay, and the number of detections. Detect the quality and congestion status of the channel.

The present invention also provides a channel detection system including an intermediate network node between a first transmission network and a second transmission network;

The intermediate network node is configured to: receive, by the to-be-detected channel, an upper layer protocol detection packet sent by the first transmission network, where the upper layer protocol detection packet is encapsulated in an encapsulation format of the first transmission network, and the upper layer protocol detection packet is sent The packet is parsed and encapsulated in an encapsulation format of the second transport network, and sent to the second transport network via the to-be-detected channel.

The intermediate network node is further configured to receive, by using the to-be-detected channel, an upper layer protocol detection response message sent by the second transmission network, where the upper layer protocol detection response message is used by the second transmission network. The encapsulation format is encapsulated, and the upper layer protocol detection response message is parsed and encapsulated in an encapsulation format of the first transmission network, and sent to the first transmission network via the to-be-detected channel.

The present invention provides a channel failure method, apparatus, and system, when an intermediate network node between a first transmission network and a second transmission network receives an upper layer protocol detection message sent by the first transmission network via the channel to be detected, The upper layer protocol detection packet is parsed and encapsulated in an encapsulation format of the second transmission network, and is sent to the second transmission network by using the to-be-detected channel, and the upper layer protocol detection packet is independent of the bearer mode and the transmission network, The intermediate network node completes the forwarding of the upper layer protocol detection packets between different networks, and solves the problem that the hybrid network cannot be detected.

BRIEF abstract

FIG. 1 is a flowchart of a channel detection method according to an embodiment of the present invention;

2 is a format diagram of an upper layer protocol detection message used in an embodiment of the present invention;

Figure 3 is a specific flow chart of step 103 in Figure 1;

4 is a schematic diagram of completing a loopback detection of each node in a network by using a channel detection method provided by an embodiment of the present invention; FIG. 5 is a schematic structural diagram of a network node according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a network node according to another embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION The existing channel detecting method cannot detect the channel in the hybrid network. In addition, whether it is ATM OAM or IP ICMP, only the underlying transmission in the interface protocol stack can be detected, and the relevant information of the upper user instance cannot be detected, and the call can be opened without traffic and the public channel can be repeatedly deleted. Diagnosis of user instance issues.

In order to solve the above problems, embodiments of the present invention provide a channel detection method based on a user plane. In the embodiment of the present invention, the intermediate network node forwards the upper layer protocol detection between the first transmission network and the second transmission network to complete the detection of the channel in the hybrid networking. The first transmission network and the second transmission network may be an ATM transmission network or an IP transmission network. Use of an embodiment of the invention The channel detection method provided is as shown in FIG. 1 for the channel detection process of the channel between two nodes in the network of the hybrid network, including:

Step 101: Detect a node structure and send an upper layer protocol detection packet.

The format of the upper layer protocol detection packet used in the embodiment of the present invention is as shown in FIG. 2, and the specific meanings of the fields are as follows:

Frame Type: 8bit, used to identify the detection 4, to distinguish it from the service 4, such as the value OxFF;

Sub Type (Sub Type): 8bit, used to detect the subtype of the packet. For example, 0x00 indicates the user plane instance request message, and 0x01 indicates the user plane instance response message. Other types can be extended.

Serial number (SN): 16bit, the sequence number of the detected packet, used to identify the only packet; Total TTL: 8bit, the number of hops for user plane channel detection, that is, from the detection initiation point to the detection The number of hops that the packet is forwarded between points;

Current TTL: 8bit, detects the current hop count of the packet, and detects the start of the request message and the upper layer protocol response message. Current TTL = Total TTL, the current TTL is decremented by 1 after each node;

Total length (16), used to identify the length of the packet, to check the correctness of the packet, and to process the extended TLV (TYPE-LENGTH-VALUE) field.

Extended field type (EXT Type), extended field length (EXT Length), and extended field value (EXT Value): TYPE, LENGTH, VALUE for detecting message extension, each message can carry multiple TLVs, In the case, the requesting side requires the respondent to fill in the field, and only the request content is filled in. The requesting end transmits the information to the responding end through the TLV. In addition, the requesting end can also record the status of the sending through the TLV, such as the time of recording and sending, etc. In response, the time and delay of the loopback can be calculated by comparing the transmission time and the time of receipt, and the detection results of multiple channels multiplexed on the same transmission link can be comprehensively analyzed to determine the transmission link. the quality of.

The description of the upper layer protocol detection packet used in the embodiment of the present invention is as follows:

Frame Type = OxFF; Sub Type = 0x00; SN starts from 0 for the same detected point, and sends a forced port 1 every time; Total 11^= detected turns; Current TTL = Total TTL; EXT Type, EXT Length, EXT Value can be defined as needed, for example Type is to initiate detection Time, Length represents the length of the following Value, and Value records the current time.

Optionally, the node information of the destination node may be requested to be obtained in the upper layer protocol detection packet, for example, the TLV is used to enable the detection responder to provide the node information of the destination network node, including the office type, the signaling point code, and the IP address.

The upper layer protocol detection packet used in the embodiment of the present invention may be an application layer, a presentation layer, a session layer, or a transport layer protocol, and an application layer protocol is preferred. In this embodiment of the present invention, the upper layer protocol detection packet is used as an application layer. The text is taken as an example for explanation.

After the upper layer protocol detection packet is constructed, the upper layer protocol detection packet is sent to the destination network node via the to-be-detected channel, and the detection timer is started.

Step 102: The intermediate network node receives, by using the to-be-detected channel, an upper layer protocol detection packet sent by the first transmission network, where the upper layer protocol detection packet is encapsulated in an encapsulation format of the first transmission network. For the ATM transmission network, the second transmission network is an example of an IP transmission network.

In this step, the intermediate network node of the to-be-detected channel receives the upper layer protocol detection packet sent from the first transmission network.

Step 103: The intermediate network node parses the upper layer protocol detection packet and encapsulates it in an encapsulation format of the second transmission network, and sends the signal to the second transmission network via the to-be-detected channel.

In this step, the upper layer protocol detection packet received by the intermediate network node is encapsulated in the encapsulation format of the first transmission network, so the upper layer protocol detection packet is parsed first, and then the parsed packet is processed according to the next step. The closed format of the transport network (ie, the second transport network) is encapsulated, and after the encapsulation is completed, is sent to the second transport network via the to-be-detected channel.

After the upper layer protocol detection packet is sent, it needs to be forwarded by some intermediate network nodes to reach the destination node. The process of forwarding the upper layer protocol detection packet is the same as that described in steps 102 and 103. Repeat the instructions. The process of forwarding the upper layer protocol detection packet from the detection initiation network node to the destination network node is shown in Figure 1. The upper layer protocol detection message is transmitted on the ATM adaptation layer and/or the transport layer, and the intermediate network node transmits the ATM transmission network. The upper layer protocol detection packet is translated into an upper layer protocol detection message in the IP transmission network to continue forwarding, and arrives at the destination network node. For any network node, after receiving the packet, it needs to determine the nature of the packet and the processing method of the packet. The specific process is shown in Figure 3, including:

Step 300: The network node receives the packet and checks the Frame Type field. If the value is OxFF, the packet is detected by the upper layer protocol, and the process proceeds to step 301. Otherwise, the packet is considered to be a normal service packet, according to the normal service flow. Processing, proceeds to step 305;

Step 301: Check the Sub Type field, if Sub Type = 0x00, it is a feature request message, and proceeds to step 302, otherwise proceeds to step 303;

Step 302: Check the value of the Current TTL field of the detection request. If the Current TTL is 1, then the request message is terminated at the local node, and the process proceeds to step 104 to construct a feature response message. If the Current TTL is > 1, then If the value of this field in the detection request packet is decremented by 1, then go to step 305; if the Current TTL is another value, discard the 4 艮 text and end the process;

Step 303: If Sub Type = 0x01, it is a feature response message, and proceeds to step 304; if both are not, the message is discarded, and the process ends;

Step 304: Check the value of the Current TTL field of the upper layer protocol detection response message. If the Current TTL is 1, the response message is terminated at the local node, and the process proceeds to step 107. If the Current TTL is 1, the request is detected. If the value of this field is decremented by 1 in the text, go to step 305. If the Current TTL is another value, discard the message and end the process.

Step 305: Forward the user service channel according to a normal service flow.

Step 104: The destination network node detects and sends an upper layer protocol detection response message according to the upper layer protocol detection packet.

In this step, the destination network node constructs an upper layer protocol detection response message: Frame Type = OxFF; Sub Type = 0x01; SN = SN of the detection request message; Total TTL = Total TTL of the detection request message; Current TTL = Total TTL .

If the detecting network node requests to acquire the node information of the destination network node in step 101, the destination network node encapsulates one or more TLVs in this step, and finally fills in Total; Length according to the length.

After the upper layer protocol detects that the response message is completed, the destination network node performs the reverse forwarding of the upper layer protocol detection response message through the to-be-detected channel (the specific implementation can be performed by receiving the detection request message. Logical channel identification IP address + UDP PORT or PORT + VPI + VCI + CID encapsulated transport layer header to the reverse of receiving the detection request message).

Step 105: The intermediate network node receives, by using the to-be-detected channel, an upper layer protocol detection response message sent by the second transmission network, where the upper layer protocol detection response message is encapsulated in an encapsulation format of the second transmission network.

For details, refer to step 102, and the description is not repeated here.

Step 106: The intermediate network node parses the upper layer protocol detection response file and encapsulates it in an encapsulation format of the first transmission network, and sends the information to the first transmission network via the to-be-detected channel. For details, see step 103. Repeat the explanation.

Step 107: The detecting initiation network node determines whether a channel to be detected is faulty.

In this step, the detection initiation network node determines whether the channel to be detected is faulty according to whether the upper layer protocol detection response message is received before the detection timer expires. If the upper layer protocol detection response message is received before the detection timer expires, the channel to be detected is considered to be normal; otherwise, the failure is considered to occur.

If the node information of the destination network node is requested in the upper layer protocol detection message in step 101, in this step, the node information of the destination network node may also be extracted and recorded. The delay can also be calculated by sending an uplink protocol to detect the packet and receiving the uplink protocol to detect the response packet. After the upper-layer protocol detection message is sent to the same destination network node multiple times and the detection related information is recorded, the channel quality and congestion degree can also be judged according to the statistical result, for example, by the maximum delay/minimum delay/average delay and the packet loss rate.

The channel fault detection method shown in Figure 1 can also be used to detect loopbacks of nodes in the network segment by segment to locate specific fault nodes and link quality, as shown in Figure 4. The fault detection of the channel can be initiated by means of a timed trigger or by receiving an external command.

An embodiment of the present invention provides a channel detection method, where an intermediate network node between a first transmission network and a second transmission network receives an upper layer protocol detection message sent by the first transmission network through the channel to be detected, The upper layer protocol detects the packet and encapsulates it in an encapsulation format of the second transport network, and sends the packet to the second transport network via the to-be-detected channel, and the upper layer protocol detects the packet. Regardless of the bearer mode and the transport network, the intermediate network node completes the forwarding of the upper layer protocol detection packets between different networks, and solves the problem that the hybrid network cannot be detected. With the detection of the channel, there is no need to establish a dedicated detection channel, no control plane participation is required, no tester is needed, and the cost is saved, and the channel test is more convenient. Compared with the channel detection methods such as ICMP and ATMOAM, the detection of the packet detection channel is independent of the bearer by the upper layer protocol, which is very suitable for the hybrid networking in the 3GPP evolution process. By detecting the channel of the hybrid network, the node information of the nodes at both ends of the channel and the delay of the transmission of the packets can be obtained, and the channel quality and congestion state are obtained, thereby further improving the channel detection in the hybrid networking.

The embodiment of the present invention further provides a network node, and the structure thereof is as shown in FIG. 5, and includes: a detection packet receiving module 501, configured to receive, by using a to-be-detected channel, an upper layer protocol detection packet sent by the first transmission network, where The upper layer protocol detection packet is encapsulated in the encapsulation format of the first transmission network, and the detection packet forwarding module 502 is configured to parse the upper layer protocol detection packet and encapsulate the encapsulation format of the second transmission network. The channel to be detected is transmitted to the second transmission network.

Further, the detection packet receiving module 501 is further configured to receive, by using the to-be-detected channel, an upper layer protocol detection response message sent by the second transmission network, where the upper layer protocol detection response message is used by the second transmission network. The encapsulation format encapsulation module 502 is further configured to parse the upper layer protocol detection response message and encapsulate the encapsulation format of the first transmission network, and send the first transmission to the first transmission network. The network sends.

Further, the structure of the foregoing network node is as shown in FIG. 6, and further includes:

The detecting module 503 is configured to configure and send the upper layer protocol detection packet, where the packet carries a request for acquiring node information of the destination network node of the to-be-detected channel, and receives the upper layer protocol detection response message. And extracting node information of the destination network node from the message, and recording the node information, the packet delay, and the number of detections, and determining the quality of the to-be-detected channel according to the node information, the packet delay, and the number of detections. And congestion status. An embodiment of the present invention further provides a channel detection system, including an intermediate network node between a first transmission network and a second transmission network;

The intermediate network node is configured to receive, by using a to-be-detected channel, an upper layer protocol detection packet sent by the first transmission network, where the upper layer protocol detection packet is encapsulated in an encapsulation format of the first transmission network, and the upper layer protocol detection packet is sent The packet is parsed and encapsulated in an encapsulation format of the second transport network, and sent to the second transport network via the to-be-detected channel.

Further, the intermediate network node is further configured to receive, by using the to-be-detected channel, an upper layer protocol detection response message sent by the second transmission network, where the upper layer protocol detection response message is encapsulated in an encapsulation format of the second transmission network. The upper layer protocol detection response message is parsed and encapsulated in an encapsulation format of the first transmission network, and sent to the first transmission network via the to-be-detected channel.

The foregoing network node and channel detection system may be combined with a channel detection method provided by an embodiment of the present invention, and an intermediate network node between the first transmission network and the second transmission network receives the first channel through the to-be-detected channel. When the upper layer protocol detection packet sent by the transmission network is parsed, the upper layer protocol detection packet is parsed and encapsulated in an encapsulation format of the second transmission network, and sent to the second transmission network via the to-be-detected channel, and the upper layer protocol is detected. The packet is not related to the bearer mode and the transport network. The intermediate network node completes the forwarding of the upper layer protocol detection packets between different networks, which solves the problem that the hybrid network cannot be detected.

It will be understood by those skilled in the art that all or part of the steps of the above embodiments may be implemented using a computer program flow, which may be stored in a computer readable storage medium, such as on a corresponding hardware platform (eg, The system, device, device, device, etc. are executed, and when executed, include one or a combination of the steps of the method embodiments.

Optionally, all or part of the steps of the foregoing embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve. Thus, the invention is not limited to any specific combination of hardware and software. The devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.

Each device/function module/functional unit in the above embodiments can be stored in a computer readable storage medium when implemented in the form of a software function module and sold or used as a standalone product. The above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

Industrial Applicability The present invention provides a channel failure method, apparatus, and system, in which an intermediate network node between a first transmission network and a second transmission network receives an upper layer protocol detection report transmitted by a first transmission network via a channel to be detected. The upper layer protocol detection packet is parsed and encapsulated in the encapsulation format of the second transmission network, and is sent to the second transmission network by using the to-be-detected channel, and the upper layer protocol detection packet, the bearer mode, and the transmission network. Irrelevant, the intermediate network node completes the forwarding of the upper layer protocol detection packets between different networks, and solves the problem that the hybrid network cannot be detected.

Claims

Claim

1. A channel detection method, comprising:

The channel detection method according to claim 1, wherein the upper layer protocol detection message is an application layer message.

The channel detecting method according to claim 1, wherein the method further comprises: before the step of receiving, by the to-be-detected channel, the upper layer protocol detection packet sent by the first transmission network, the method further comprising:

The channel detection method according to claim 3, wherein the parsing of the upper layer protocol detection message is encapsulated in an encapsulation format of the second transmission network, and the second transmission is performed by the to-be-detected channel. After the step of sending the network, the method further includes:

The channel detection method according to claim 4, wherein the upper layer protocol detection response message carries node information of the destination network node, and the upper layer protocol detection response message is parsed and After the step of transmitting the encapsulation format of the transmission network to the first transmission network, the method further includes:

The channel detection method according to claim 5, wherein the method further comprises: Determining the quality and congestion status of the to-be-detected channel according to the node information, the message delay, and the number of detections.

7. A network node, the network node comprising:

8. The network node according to claim 7, wherein

The network node according to claim 7, wherein the network node further comprises: a detecting module, wherein the detecting module is configured to: construct and send the upper layer protocol detecting message, and carry the acquiring in the packet Receiving, by the request for the node information of the destination network node of the channel to be detected, receiving the upper layer protocol detection response message, extracting node information of the destination network node from the message, and recording the node information and the packet delay And the number of detections, determining the quality and congestion status of the to-be-detected channel according to the node information, the message delay, and the number of detections.

10. A channel detection system, the system comprising an intermediate network node between a first transmission network and a second transmission network;

11. The channel detecting system according to claim 10, wherein

The intermediate network node is further configured to: receive, by the to-be-detected channel, an upper layer protocol detection response message sent by the second transmission network, where the upper layer protocol detection response message is encapsulated in an encapsulation format of the second transmission network, The upper layer protocol detects that the response message is parsed and encapsulated in an encapsulation format of the first transport network, and is sent to the first transport network via the to-be-detected channel.