CN102917408B - Downlink flow control method and system of LNS (L2TP network server) device in 3G (third-generation) network - Google Patents

Abstract

The present invention relates to routing switching control technology in the field of network communication, which discloses a method and system for controlling the downlink flow of LNS end in 3G network, which can reasonably and effectively distribute the downlink flow of LNS end without controlling the number of terminal access . The method includes: A. The 3G access device regularly sends a PPP Keepalive message to the Layer 2 Tunneling Protocol network server LNS device, and the PPP Keepalive message carries the signal value and network service type information of the 3G access interface of the 3G access device ; After receiving the PPP Keepalive message of the 3G access device, the B.LNS device calculates the corresponding PPP value of the 3G access device according to the signal value and network service type information of the 3G access interface of the 3G access device in the message. Send priority and save it; C. When the LNS device receives a message to be sent to the 3G access device, according to the recorded sending priority of the 3G access device, the message is queued to the corresponding sending priority QOS queue for sending. The invention is applicable to the control of the downstream flow of the LNS end in the 3G network.

Description

Method and system for controlling downlink flow of LNS equipment in 3G network

technical field

The invention relates to network communication technology in the field of network communication, in particular to a downlink flow control method of a network server device in the application of a virtual private dial-up network of a 3G network.

Background technique

Virtual private dial-up network (Virtual Private Dial-up Network, VPDN) provides connections for remote users who expect a dedicated line access to the corporate network through an Internet Service Provider (ISP). With the wide application of 3G communication technology, a large number of L2TP (Layer 2Tunneling Protocol, Layer 2 Tunneling Protocol) application requirements appear in 3G private networks. L2TP protocol is a kind of VPDN technology. When 3G access equipment dials into ISP, L2TP The access concentrator (LAC) establishes an L2TP tunnel with the network server (LNS) on the user network side, and the connection between the 3G access device and the LNS device is maintained through a point-to-point protocol keep-alive message (ppp keepalive).

At present, the LNS device of the L2TP (version 2) protocol, that is, the device on the user's private line access side, lacks a simple and effective flow control scheme for a large number of L2TP private line users; therefore, when a large number of 3G access devices are connected at the same time, How to control the downlink flow of LNS equipment is a problem. In the traditional technology, a control measure often adopted is: when the access bandwidth of the 3G access device exceeds a certain limit, session access is not allowed. This method only controls the user's access, and does not allocate the bandwidth reasonably according to the actual situation of each line, which is also unfair to the user.

Contents of the invention

The technical problem to be solved by the present invention is to propose a method and system for controlling the downlink flow of LNS equipment in a 3G network, which can reasonably and effectively distribute the downlink flow of LNS equipment without controlling the number of terminal equipment connected.

The solution adopted by the present invention to solve the above-mentioned technical problems is: a method for controlling the downlink flow of LNS equipment in a 3G network, comprising the following steps:

A. The 3G access device regularly sends a point-to-point protocol keep-alive PPPKeepalive message to the Layer 2 Tunneling Protocol network server LNS device, and the PPP Keepalive message carries the signal value and network service type of the 3G access interface of the 3G access device information;

B. After the LNS device receives the PPP Keepalive message of the 3G access device, it calculates and calculates the 3G access device according to the signal value and network service type information of the 3G access interface of the 3G access device in the PPP Keepalive message Corresponding sending priority and save;

C. When the LNS device receives a message to be sent to the 3G access device, according to the recorded sending priority corresponding to the 3G access device, the message is queued to the QOS queue corresponding to the sending priority for processing send.

Preferably, said step B specifically includes:

B1. The LNS device establishes a correspondence table between the average value of the periodic signal of the 3G access interface of the 3G access device, the network service type and the sending priority;

B2. After receiving the PPP Keepalive message of the 3G access device, the LNS device calculates the 3G access device according to the signal value and network service type information of the 3G access interface of the 3G access device carried in the PPP Keepalive message The periodic signal average value of the 3G access interface and query the corresponding relationship table to obtain the corresponding transmission priority, update and save the record table of the virtual access interface number, periodic signal average value, and transmission priority corresponding to the 3G access device.

Preferably, said step C specifically includes:

C1. After the LNS device receives the message to be sent to the 3G access device, it sets the priority of the QOS queue corresponding to the message according to the sending priority corresponding to the 3G access device, and according to the set priority of the QOS queue Enqueue the message to the corresponding QOS queue;

C2. The LNS device sends the packets in each QOS queue according to the QOS policy.

Specifically, the record table also stores the current signal value and network service type information of the 3G access interface of the 3G access device.

Specifically, the average value of the periodic signal refers to the average value of the current signal value of the 3G access interface of the 3G access device calculated within a set or configured time period.

Specifically, the current signal value and the average value of the periodic signal of the 3G access interface of the 3G access device refer to converted representative values.

Specifically, the network service type includes 2G network and 3G network.

Another object of the present invention is to provide a downlink flow control system for LNS equipment in a 3G network, including at least one 3G access equipment and a Layer 2 Tunneling Protocol network server LNS equipment, and the 3G access equipment accesses the centralized network through the Layer 2 Tunneling Protocol The L2TP tunnel established between the LAC device and the LNS device accesses the LNS device, wherein,

The 3G access device is used to regularly send a point-to-point protocol keep-alive PPPKeepalive message to the Layer 2 tunneling protocol network server LNS device, and the PPP Keepalive message carries the signal value of the 3G access interface of the 3G access device, network service type information;

The LNS device is used to calculate and match the 3G access device according to the signal value and network service type information of the 3G access interface of the 3G access device in the PPP Keepalive message after receiving the PPP Keepalive message of the 3G access device. The transmission priority corresponding to the device is saved; when a message to be sent to the 3G access device is received, according to the recorded transmission priority corresponding to the 3G access device, the message is enqueued to the queue corresponding to the transmission priority QOS queue for sending.

Specifically, the LNS device is also used for,

Establishing a corresponding relationship table between the average value of periodic signals of the 3G access interface of the 3G access device, network service type and transmission priority;

After receiving the PPP Keepalive message of the 3G access device, calculate the 3G access status of the 3G access device according to the signal value and network service type information of the 3G access interface of the 3G access device carried in the PPP Keepalive message. The average value of the periodic signal of the interface and query the corresponding relationship table to obtain the corresponding transmission priority, update and save the record table of the virtual access interface number, the average value of the periodic signal, and the transmission priority corresponding to the 3G access device.

Specifically, the LNS device is also used for,

After receiving the message to be sent to the 3G access device, set the priority of the QOS queue corresponding to the message according to the sending priority corresponding to the 3G access device, and send the message into the queue to the corresponding QOS queue;

Send packets in each QOS queue according to the QOS policy.

The beneficial effects of the present invention are: the signal value and the network service type of the 3G access interface of the 3G access device are carried to the LNS device through the PPP Keepalive message, and the network service type is distinguished and the network service type of each network type is distinguished in the LNS device. The strength of the signal value is recorded and through related calculations, the priority of sending to the 3G access device is determined. The priority is associated with the QOS queue, which can realize reasonable and effective allocation without controlling the number of user equipment access LNS downlink bandwidth.

Description of drawings

Fig. 1 is the flowchart of the downlink flow control method of LNS equipment in the 3G network of the embodiment of the present invention;

FIG. 2 is a schematic diagram of an application environment of an LNS device downlink traffic control network in a 3G network according to an embodiment of the present invention.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

The embodiment of the present invention proposes a method for controlling downlink traffic of LNS devices in a 3G network, which can reasonably and effectively distribute downlink traffic of LNS devices without controlling the number of connected terminal devices. Referring to Fig. 1, it is a flowchart of a method for controlling the downlink flow of an LNS device in a 3G network according to an embodiment of the present invention, including the following implementation steps:

Step 101, the 3G access device regularly sends a point-to-point protocol keep-alive PPPKeepalive message to the Layer 2 Tunneling Protocol network server LNS device, and the PPP Keepalive message carries the signal value of the 3G access interface of the 3G access device, network service type information. The network service type includes 2G network and 3G network.

Step 102: After receiving the PPP Keepalive message of the 3G access device, the LNS device calculates and calculates the 3G access link according to the signal value and network service type information of the 3G access interface of the 3G access device in the PPP Keepalive message. The sending priority corresponding to the device and save it. The specific implementation of this step includes:

1021. The LNS device creates a correspondence table between the average value of periodic signals of the 3G access interface of the 3G access device, network service types, and transmission priorities. The sending priority in the correspondence table is consistent with the priority classification of the QOS priority queue. The average value of the periodic signal in this step refers to the average value of the current signal value of the 3G access interface of the 3G access device calculated within the set or configured time period. For example, it refers to the average value of all signals received by the 3G access interface of the G access device within T1 time. When T1 is preset to 2 minutes, the 3G access interface of the 3G access device sends it once every 10 seconds by default. PPP Keepalive message, under normal circumstances, the LNS device receives the signal values of 12 3G access interfaces within 2 minutes, and the value obtained by adding up the 12 signal values and dividing by 12 is the 3G access interface The average value of the periodic signal of the 3G access interface of the device. Generally speaking, the signal value of the 3G access interface is a negative value. For the convenience of calculation, the real average value of the periodic signal can be converted into a representative value. The specific conversion can be shown in Table 1 below. This is just an example and does not mean This is a limitation of the invention.

Table 1

Signal value (unit dbm) representative value no signal 99 <=-125 0 -124 1 -122 2 -121 3 -119 4 -117 5 -116 6 -114 7 -113 8 -111 9 -109 10 -108 11 -106 12 -105 13 -103 14 -101 15 -100 16 -98 17 -96 18 -95 19 -93 20 -92 twenty one -90 twenty two -88 twenty three -87 twenty four -85 25 -84 26 -82 27 -80 28 -79 29 -77 30 >=-75 31

According to the above representative value of the average value of the periodic signal, the correspondence table between the average value of the periodic signal of the 3G access interface, the network service type and the sending priority can be set as shown in Table 2 below.

Table 2

1022. After receiving the PPP Keepalive message of the 3G access device, the LNS device calculates the 3G access device's 3G access device according to the signal value and network service type information of the 3G access interface of the 3G access device carried in the PPP Keepalive message. The periodic signal average value of the 3G access interface and query the corresponding relationship table to obtain the corresponding transmission priority, update and save the record table of the virtual access interface number, periodic signal average value, and transmission priority corresponding to the 3G access device. For the convenience of calculation, the current signal value and network service type information of the 3G access interface of the 3G access device can also be saved in the record table. The current signal value refers to the signal value carried by the PPP Keepalive message received by the LNS device from the 3G access device. According to the convenience of implementation, if the average value of the periodic signal adopts a representative value, the current signal value saved here may also be the representative value generated by referring to Table 1.

Step 103, when the LNS device receives the message to be sent to the 3G access device, according to the recorded sending priority corresponding to the 3G access device, enqueue the message to the QOS queue corresponding to the sending priority for to send. The specific implementation of this step is as follows:

1031. After the LNS device receives the message to be sent to the 3G access device, it sets the priority of the QOS queue corresponding to the message according to the transmission priority corresponding to the 3G access device, and according to the set priority of the QOS queue Enqueue the packet to the corresponding QOS queue. In this step, after the LNS device receives the message to be sent to the 3G access device, it first searches the routing table according to the destination IP address carried by the message to obtain the virtual access interface VA number corresponding to the destination 3G access device, and uses The VA slogan can query the record table to obtain the sending priority corresponding to the destination 3G access device, so as to set it as the priority of sending the message, that is, the priority of the corresponding QOS queue will be, so that the message is sent to the corresponding QOS queue.

1032. The LNS device sends the packets in each QOS queue according to the QOS policy.

The embodiment of the present invention also provides a control system for implementing the above-mentioned downlink traffic control method. Referring to FIG. The tunneling protocol network server LNS device, the 3G access device accesses the LNS device through the L2TP tunnel established between the L2 tunneling protocol access concentrator LAC device and the LNS device.

The 3G access device is used to regularly send a point-to-point protocol keep-alive PPPKeepalive message to the Layer 2 tunneling protocol network server LNS device, and the PPP Keepalive message carries the signal value of the 3G access interface of the 3G access device, network service Type information; the 3G access device may be a 3G router or other 3G devices for access.

The LNS device is used to calculate and match the 3G access device according to the signal value and network service type information of the 3G access interface of the 3G access device in the PPP Keepalive message after receiving the PPP Keepalive message of the 3G access device. The transmission priority corresponding to the device is saved; when a message to be sent to the 3G access device is received, according to the recorded transmission priority corresponding to the 3G access device, the message is enqueued to the queue corresponding to the transmission priority QOS queue for sending.

The LNS device is also used to set up a correspondence table between the periodic signal average value of the 3G access interface of the 3G access device, the network service type and the sending priority; after receiving the PPP Keepalive message of the 3G access device , according to the signal value and network service type information of the 3G access interface of the 3G access device carried in the PPP Keepalive message, calculate the average value of the periodic signal of the 3G access interface of the 3G access device and query the corresponding relationship Obtain the corresponding transmission priority in the table, update and save the record table of the virtual access interface number corresponding to the 3G access device, the average value of the periodic signal, and the transmission priority; the LNS device receives the message to be sent to the 3G access device Finally, set the priority of the QOS queue corresponding to the message according to the sending priority corresponding to the 3G access device, enqueue the message to the corresponding QOS queue according to the priority of the set QOS queue; send each message according to the QOS policy Packets in the QOS queue.

The system for controlling downlink flow of LNS devices in a 3G network in this embodiment reasonably and effectively distributes downlink flow of LNS devices in combination with existing QOS policies without controlling the number of 3G access devices.

Claims (10)

1. In 1.3G network, LNS equipment downlink traffic control method, is characterized in that, comprise the steps:

   A.3G access device timing sends point-to-point protocol keep-alive PPP Keepalive message to L2TP Network Server LNS equipment, carries signal value, the types of network services information of the 3G access interface of this 3G access device in described PPP Keepalive message;

   After B.LNS equipment receives the PPP Keepalive message of 3G access device, according to signal value, the types of network services information of the 3G access interface of the 3G access device in this PPP Keepalive message, calculate and transmission priority corresponding to this 3G access device preserving;

   When C.LNS equipment receives the message being sent to 3G access device, the transmission priority corresponding according to this 3G access device of record, the QOS queue corresponding with described transmission priority of being joined the team to by message is to send.
2. 2. LNS equipment downlink traffic control method in 3G network as claimed in claim 1, it is characterized in that, described step B specifically comprises:

   B1.LNS equipment sets up the periodic signal mean value of the 3G access interface of 3G access device, the mapping table between types of network services and transmission priority;

   After B2.LNS equipment receives the PPP Keepalive message of 3G access device, according to signal value, the types of network services information of the 3G access interface of the 3G access device carried in this PPP Keepalive message, calculate the periodic signal mean value of the 3G access interface of this 3G access device and inquire about described mapping table and obtain corresponding transmission priority, upgrading and preserve virtual access interface corresponding to this 3G access device number, periodic signal mean value, send the record sheet of priority.
3. 3. LNS equipment downlink traffic control method in 3G network as claimed in claim 2, it is characterized in that, described step C specifically comprises:

   After C1.LNS equipment receives the message being sent to 3G access device, the transmission priority corresponding according to this 3G access device arranges the priority of QOS queue corresponding to this message, the QOS queue of correspondence of being joined the team to by message according to the priority of QOS queue arranged;

   C2.LNS equipment sends the message in each QOS queue according to QOS strategy.
4. 4. LNS equipment downlink traffic control method in 3G network as claimed in claim 2 or claim 3, is characterized in that, also saving current signal value and the types of network services information of the 3G access interface of 3G access device in described record sheet.
5. 5. LNS equipment downlink traffic control method in 3G network as claimed in claim 4, is characterized in that, described periodic signal mean value, refers to the mean value of the current signal value of the 3G access interface of the 3G access device calculated within the time cycle set or configure.
6. 6. LNS equipment downlink traffic control method in 3G network as claimed in claim 4, it is characterized in that, the current signal value of the 3G access interface of described 3G access device, periodic signal mean value refer to the typical value after conversion.
7. 7. LNS equipment downlink traffic control method in 3G network as claimed in claim 4, it is characterized in that, described types of network services comprises 2G internet and 3G network.
8. LNS equipment downlink traffic control system in 8.3G network, comprise at least one 3G access device and L2TP Network Server LNS equipment, described 3G access device accesses described LNS equipment by the L2TP Tunnel that Layer 2 Tunneling Protocol LAC LAC equipment and LNS equipment are set up, it is characterized in that

   3G access device, send point-to-point protocol keep-alive PPP Keepalive message for timing to L2TP Network Server LNS equipment, in described PPP Keepalive message, carry signal value, the types of network services information of the 3G access interface of this 3G access device;

   LNS equipment, for receive 3G access device PPP Keepalive message after, according to signal value, the types of network services information of the 3G access interface of the 3G access device in this PPP Keepalive message, calculate and transmission priority corresponding to this 3G access device preserving; When receiving the message being sent to 3G access device, the transmission priority corresponding according to this 3G access device of record, the QOS queue corresponding with described transmission priority of being joined the team to by message is to send.
9. 9. LNS equipment downlink traffic control system in 3G network as claimed in claim 8, is characterized in that, described LNS equipment also for,

   Set up the periodic signal mean value of the 3G access interface of 3G access device, the mapping table between types of network services and transmission priority;

   After receiving the PPP Keepalive message of 3G access device, according to signal value, the types of network services information of the 3G access interface of the 3G access device carried in this PPP Keepalive message, calculate the periodic signal mean value of the 3G access interface of this 3G access device and inquire about described mapping table and obtain corresponding transmission priority, upgrading and preserve virtual access interface corresponding to this 3G access device number, periodic signal mean value, send the record sheet of priority.
10. 10. as claimed in claim 8 or 9 LNS equipment downlink traffic control system in 3G network, is characterized in that, described LNS equipment also for,

    After receiving the message being sent to 3G access device, the transmission priority corresponding according to this 3G access device arranges the priority of QOS queue corresponding to this message, the QOS queue of correspondence of being joined the team to by message according to the priority of QOS queue arranged;

    The message in each QOS queue is sent according to QOS strategy.