CN104301294A

CN104301294A - DNS query request response method and device and network side equipment

Info

Publication number: CN104301294A
Application number: CN201310306965.9A
Authority: CN
Inventors: 黄昭文
Original assignee: China Mobile Group Guangdong Co Ltd
Current assignee: China Mobile Group Guangdong Co Ltd
Priority date: 2013-07-19
Filing date: 2013-07-19
Publication date: 2015-01-21
Anticipated expiration: 2033-07-19
Also published as: CN104301294B

Abstract

The invention provides a DNS query request response method and device and network side equipment. The method comprises the steps that interaction information between a terminal client and a DNS server is monitored at a wireless network interface; when a first DNS query request message is obtained via monitoring but response information of the first DNS query request message is not obtained via monitoring within a first preset period thereafter, a first DNS query response message of the first DNS query request message is generated according to correspondence between domain name request information and domain name response information as well as the first DNS query request message; and the first DNS query response message is sent to the first terminal client via the wireless network interface. Thus, the terminal client can obtain DNS query response timely, and the networking feeling of subscribers can be improved.

Description

A kind of response method of DNS query request, device and network equipment

Technical field

The present invention relates to data service technical field, particularly relate to a kind of response method of DNS query request, device and network equipment.

Background technology

Along with the continuous growth of mobile phone user quantity, the business function of all kinds of mobile phone terminal support constantly increases, the functions such as such as mobile phone QQ, micro-letter, Fetion, mobile-phone securities, mobile phone are browsed, file download progressively become mobile phone terminal, the especially mainstream applications of smart mobile phone.

In upper network process, mobile phone needs its real IP address of inquiry of the domain name to URL, to send packet.This action need just can be completed by inquiry dns server.

Dns server provides a kind of like this service, and its database that is local by recursive lookup and other associated servers, is mapped to IP address by domain name.As far back as Advanced Research Projects Agency Network, this mapping is only kept in a host.txt, and for a network having the large-scale timesharing machine of hundreds of platform, this method work obtains very well.But, along with developing rapidly of the Internet, consider load and delay, want to realize this centralized management and become and be difficult to the imagination.For this reason, people have invented DNS (Domain-name System, domain name system).

The key of DNS is the database of how maintenance field name analysis, the mapping one by one of domain name and IP address of this data-base recording, every bar record is all a five-tuple, comprise Domain_name (domain name), Time_to_live (life cycle), Class (classification), Type (type), Value (value).

When mobile phone carries out the PDP activation of GPRS/TD, network G GSN can send dns server information by SGSN to mobile phone.Mobile phone, when follow-up online, will send to this dns server inquiry request.

But owing to there is the situation of Network Packet Loss and dns server operation exception, through observing, the timely response ratio of the dns server in network can not reach 100%, is without response or response time overlength viewed from phenomenon.By analysis, the DNS query response ratio <93% that existing network is general.When client can not receive dns server inquiry response data time, again will inquire about after waiting for a period of time, the stand-by period that this operation will additionally introduce 3 seconds to 5 seconds, extra wait time delay will be introduced to the online perception of client.

For the situation that DNS does not respond, at present mainly through carrying out dilatation to dns server to improve response ratio.But through observing, packet loss is not generally tight especially without response and the load incidence relation of dns server, even if dilatation dns server can not solve whole issue; In addition, the dns server that cell-phone customer terminal uses likely has multiple, and differs to establish a capital and belong to consolidated network management domain, therefore not necessarily can dilatation.

Or, some Network Packet Loss phenomenons can be reduced by dilatation transmission link.But the number of links experienced to dns server due to mobile phone terminal and distance are comparatively far away, are difficult to all links and equipment all dilatations.

Summary of the invention

In view of this, the object of the embodiment of the present invention is to provide a kind of response method of DNS query request, device and network equipment, obtains DNS query response in time, improve the online perception of user with support terminal client.

For solving the problems of the technologies described above, the embodiment of the present invention provides scheme as follows:

The embodiment of the present invention provides a kind of response method of DNS query request, and described method comprises:

Monitor step: the interactive information between radio network interface monitor terminal client and dns server;

Generation step: when listening in first preset duration time of delay after the first DNS query request message the response message do not heard for described first DNS query request message, according to the corresponding relation of domain name request information and dns response information, with described first DNS query request message, generate the first DNS query response message for described first DNS query request message, wherein, described first DNS query request message is sent to dns server by first terminal client, described first DNS query request message comprises domain name solicited message, described first DNS query response message comprises domain name response message,

Forwarding step: send described first DNS query response message to described first terminal client by described radio network interface.

Preferably, described radio network interface is the gn interface of GPRS network.

Preferably, before described generation step, described method also comprises:

Determining step: when listening to the second DNS query response message that dns server returns to the second client terminals, domain name response message is parsed from described second DNS query response message, and according to the second DNS query request message listened to the domain name request information comprised and the domain name response message parsed, determine described corresponding relation;

Wherein, described second DNS query response message is for described second DNS query request message.

Preferably, after described determining step, described method also comprises:

Determining step: judge that whether described corresponding relation is effective, if so, enter described generation step; Otherwise, do not enter described generation step.

Preferably, describedly judge whether described corresponding relation effectively specifically comprises:

Judge, in second preset duration time of delay after described determining step determines described corresponding relation, whether to listen to the 3rd DNS query response message, obtain judged result; Wherein, described 3rd DNS query response message is for the 3rd DNS query request message comprising domain name solicited message, and described 3rd DNS query response message comprises domain name response message;

When described judged result is for being, described corresponding relation is effective;

When described judged result is no, described corresponding relation is invalid.

The embodiment of the present invention also provides a kind of responding device of DNS query request, and described device comprises:

Monitor module, for the interactive information between radio network interface monitor terminal client and dns server;

Generation module, for when listening in first preset duration time of delay after the first DNS query request message the response message do not heard for described first DNS query request message, according to the corresponding relation of domain name request information and dns response information, with described first DNS query request message, generate the first DNS query response message for described first DNS query request message, wherein, described first DNS query request message is sent to dns server by first terminal client, described first DNS query request message comprises domain name solicited message, described first DNS query response message comprises domain name response message,

Sending module, for sending described first DNS query response message by described radio network interface to described first terminal client.

Preferably, described device also comprises:

Determination module, before generating described first DNS query response message for described generation module, when listening to the second DNS query response message that dns server returns to the second client terminals, domain name response message is parsed from described second DNS query response message, and according to the second DNS query request message listened to the domain name request information comprised and the domain name response message parsed, determine described corresponding relation;

Preferably, described device also comprises:

Judge module, for judging that whether described corresponding relation is effective, if so, enters described generation module; Otherwise, do not enter described generation module.

Preferably, described judge module specifically comprises:

Whether judging unit, in second preset duration time of delay after described determination module determines described corresponding relation for judging, listen to the 3rd DNS query response message, obtain judged result; Wherein, described 3rd DNS query response message is for the 3rd DNS query request message comprising domain name solicited message, and described 3rd DNS query response message comprises domain name response message;

When described judged result is for being, described corresponding relation is effective, enters described generation module;

When described judged result is no, described corresponding relation is invalid, does not enter described generation module.

The embodiment of the present invention also provides a kind of network equipment comprising the responding device of above-described DNS query request.

As can be seen from the above, the embodiment of the present invention at least has following beneficial effect:

Do not generate during by hearing corresponding response message in the preset duration time of delay after listening to inquiry request message and send the query response message for this inquiry request message to client terminals, thus enable client terminals obtain DNS query response in time, thus improve the online perception of user.

Accompanying drawing explanation

Fig. 1 represents the flow chart of steps of the response method of a kind of DNS query request that the embodiment of the present invention provides;

Fig. 2 represents the system configuration schematic diagram of the better embodiment of the embodiment of the present invention;

Fig. 3 represents the legend of DNS request;

Fig. 4 represents the legend that DNS responds;

Fig. 5 represents the workflow diagram of the better embodiment of the embodiment of the present invention;

Fig. 6 represents GPRS logical construction;

Fig. 7 represents the network configuration situation schematic diagram through WAP gateway in GPRS networking;

Fig. 8 represents GPRS CMWAP APN PDP activation schematic flow sheet.

Embodiment

For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawings and the specific embodiments the embodiment of the present invention is described in detail.

Fig. 1 represents the flow chart of steps of the response method of a kind of DNS query request that the embodiment of the present invention provides, and with reference to Fig. 1, the embodiment of the present invention provides a kind of response method of DNS query request, and described method comprises the steps:

Step 101, monitors step: the interactive information between radio network interface monitor terminal client and dns server;

Step 102, generation step: when listening in first preset duration time of delay after the first DNS query request message the response message do not heard for described first DNS query request message, according to the corresponding relation of domain name request information and dns response information, with described first DNS query request message, generate the first DNS query response message for described first DNS query request message, wherein, described first DNS query request message is sent to dns server by first terminal client, described first DNS query request message comprises domain name solicited message, described first DNS query response message comprises domain name response message,

Step 103, forwarding step: send described first DNS query response message to described first terminal client by described radio network interface.

Visible, for client terminals by wireless network and the mutual scene of dns server, response speed due to dns server reduces or the reason such as chain circuit transmission time delay, client terminals possibly cannot obtain DNS query response sometimes in time, thus have influence on the online perception of user, and the embodiment of the present invention, do not generate during by hearing corresponding response message in the preset duration time of delay after listening to inquiry request message and send the query response message for this inquiry request message to client terminals, thus enable client terminals obtain DNS query response in time, thus improve the online perception of user.In addition, DNS query response message also can respond to client terminals by the situation that cannot respond DNS query request because of self reason for dns server, thus improves the success rate of DNS response.

Wherein, described radio network interface can be the gn interface of GPRS network.

The mobile terminal that terminal can be able to be got online without being tethered to a cable for mobile phone, panel computer etc. or portable terminal device.

The described response message for described first DNS query request message can be the form of DNS query response message.

In embodiments of the present invention, described corresponding relation can be imported from the mapping table preset by artificial mode; Or, consider that described corresponding relation may be dynamically occur, so can have:

Before described generation step, described method also comprises:

Wherein, described second client terminals can be identical or different with described first terminal client.

Further, consider that described corresponding relation may have ageing, so can have:

After described determining step, described method also comprises:

Here, describedly judge whether described corresponding relation effectively specifically can comprise:

For the embodiment of the present invention being set forth clearly clear, provide the better embodiment of the embodiment of the present invention below.

This better embodiment provides a kind of and controls the DNS query response delay of surfing Internet with cell phone user and the method and apparatus of success rate

This better embodiment is achieved through the following technical solutions:

Fig. 2 represents the system configuration schematic diagram of the better embodiment of the embodiment of the present invention, with reference to Fig. 2, the system implementing this better embodiment technical scheme forms primarily of cell-phone customer terminal 201, BSC205, SGSN202, GGSN203, dns server 204, DNS booster response server 206, wherein:

Cell-phone customer terminal 201 is after access GPRS BSC205 network, its domain name request packet arrives dns server 204 by SGSN202, GGSN203, in this reciprocal process, cell-phone customer terminal 201 will mail to dns server 204 DNS request packet, and dns server 204 will send to cell-phone customer terminal 201 response data.DNS booster response server can according to these data, carry out fast resolving, and result is directly returned to cell-phone customer terminal 201 to failing the DNS request of response in time, thus realize effective DNS query and accelerate to promote with success rate.

Fig. 5 represents the workflow diagram of the better embodiment of the embodiment of the present invention, and with reference to Fig. 5, the workflow of this better embodiment is:

The first step: in order to use handset netting service, client is by the BSC of wireless network access GPRS network, and it is consistent that the signalling interactive process taked and conventional mobile phone terminal access GSM/GPRS network.Client, before the concrete business of use access, needs to carry out DNS query.DNS query request, after BSC switching, is mail to SGSN through Gb Interface, and is transmitted to dns server by SGSN through GGSN.Under normal circumstances, dns server will return to mobile phone terminal inquiry of the domain name result.Request and the response message of carrying out DNS query user has been marked respectively in Fig. 3 and Fig. 4.One of key point of this better embodiment proposed scheme is by this request of DNS booster response collection of server and response message, for the follow-up control to response delay.

Second step: DNS booster response server, to the request and the response message that the data link between SGSN and GGSN gather the DNS query that user surfs the Net, sets up the home domain name database of each DNS request and response, as shown in table 1:

Table 1: home domain name database

Wherein,

(1) the recent renewal time: be this object time of DNS booster response server last update;

(2) domain name request: be the domain name request information that client mails to dns server, as imap.163.com;

(3) dns server address: be responsible for the server ip address of resolving DNS domain name;

(4) request type: the type of DNS query has multiple, table 2 is corresponding lists:

Table 2

(5) dns response: the domain-name information of corresponding DNS request, such as 123.125.50.47;

(6) side information: the side information of corresponding dns response, the registrar name of such as this domain name and address;

(7) number of times: DNS booster response server is to the successful monitoring number of times that should ask and respond, and often listen to and once effectively respond, this counter just adds 1;

3rd step:

DNS query request in DNS booster response server monitored link, but with regard to updating form 1 when listening to effective response; If if the at the appointed time interior response still not receiving server of scope T, then think that this request is failed.Time range T wherein can set, such as 1 second.

For the request Q of failure, DNS booster response server inquires about respective column " domain name request " according to table 1.

If there is no the entry of Q in these row, then think invalid inquiry, do not do further process;

Otherwise according to this destination field in this table: dns server address (A), request type (Q), dns response (R), side information (P) constructs following response message and returns to mobile phone terminal through SGSN.

Table 3: local response message table

Because this response is by DNS booster response server constructs, his-and-hers watches 1 are not therefore needed to upgrade.

4th step:

Cell-phone customer terminal is after receiving the response message that the 3rd step provides, because server address corresponding to this response message, message source port equal this mobile phone terminal and send DNS request message, therefore think that this is a normal DNS response, so the Internet resources corresponding according to the guide access of DNS response message;

After adopting the technical scheme of better embodiment, all rational DNS query requests can meet with a response in time range T, thus effectively control response time and the success rate of DNS.

5th step:

Because the request of DNS domain name and response message may exist the situation of inefficacy after extended periods, therefore DNS booster response server needs periodic scanning table 1: home domain name database, the entry exceeding threshold value Y update time is deleted, to reduce the quantity of invalid name server.Y value can set, such as 300 seconds.

This better embodiment proposes and a kind ofly controls the DNS query response delay of surfing Internet with cell phone user and the method and apparatus of success rate in the DNS Technology for Ensuring QoS of surfing Internet with cell phone,

Propose a kind of DNS query and the response message that gather user's online, according to inquiry and response condition, set up the method for the home domain name database of each DNS query and response message;

Propose the time-out of the cell-phone customer terminal DNS request without response, by conjunction with home domain name database information structuring DNS response message and return to the method for cell-phone customer terminal;

Propose and periodic cleaning invalid data is carried out to maintain the method for domain-name information validity to home domain name database.

The advantage of this better embodiment:

Because this method directly gathers DNS information on SGSN and the GGSN link of core net closest to user, DNS query time-out that the data link packet loss due to dns server operation irregularity or SGSN to DNS causes can be solved without response problem;

The enforcement of this method has nothing to do with the quantity of dns server and physical location, can solve the problem of multiple dns server with a method;

Because this method only needs to set up and safeguard request and the response database table of DNS, and do not need to carry out the DNS such as recursive query or rights management and operate, it is hereby ensured response speed.According to assessment, the DNS of surfing Internet with cell phone responds ratio and can rise to 99 percent by 93 percent.

Here the background knowledge of the GPRS online flow process involved by this better embodiment is described below:

Fig. 6 represents GPRS logical construction, and Fig. 7 represents the network configuration situation schematic diagram through WAP gateway in GPRS networking, is connected by base station, BSC PCU, SGSN, GGSN with reference to Fig. 7, WAP terminal with WAP gateway with WAP application server and www server.

About GPRS CMWAP APN PDP activation flow process: with reference to Fig. 8, cell-phone customer terminal, before using the online of CMWAP business by GPRS, needs first to carry out CMWAP APN activation manipulation.

Term:

GSM:Global System for Mobile Communications, global system for mobile communications;

GPRS:General Packet Radio Service, GPRS;

TD:TD-SCDMA, time-division synchronous CDMA, is called for short TD, the synchronization code multi-address division system of the employing Time division duplex proposed by China, one of large international standard of 3-G (Generation Three mobile communication system) (3G) three;

3G:3rd-Generation, G mobile communication;

WAP:Wireless Application Protocol, WAP (wireless application protocol);

APN:Access Point Name, access point;

FTP:File Transfer Protocol, file transfer protocol (FTP);

UDP:User Datagram Protoco, User Datagram Protoco (UDP);

SGSN:Serving GPRS Support Node, Serving GPRS Support Node;

GGSN:Gateway GPRS Support Node, Gateway GPRS Support Node;

TE:Terminal Equipment, terminal equipment;

MT:Mobile Terminal, mobile terminal;

BSS:Base Station System, base station system;

BTS:Base Transceiver Station, base transceiver station;

BSC:Base Station Controller, base station controller;

GMSC:Gateway Mobile Services Switching Center, Gateway Mobile services switching center;

MSC:Mobile Switching Center, mobile switching centre;

VLR:Visitor Location Register, Visited Location Registor;

HLR:Home Location Register, attaching position register;

AUC:Authentication Center, AUC;

EIR:Equipment Identity Register, equipment identity register;

Um:Air Interface, air interface;

A, Abis:Interfaces(GSM), interface (GSM);

Gx:Interfaces(GPRS), interface (GPRS);

ID:Identifier, identifier;

TEID:Tunnel End point ID, tunnel endpoint identifier;

PCU:Package Control Unit, GPRS packet control unit;

Gn interface: Gn Interface, the communication interface in same PLMN between SGSN and SGSN and between SGSN and GGSN.

Visible, do not generate during by hearing corresponding response message in the preset duration time of delay after listening to inquiry request message and send the query response message for this inquiry request message to client terminals, thus enable client terminals obtain DNS query response in time, thus improve the online perception of user.In addition, DNS query response message also can respond to client terminals by the situation that cannot respond DNS query request because of self reason for dns server, thus improves the success rate of DNS response.

Wherein, described radio network interface is the gn interface of GPRS network.

In addition, described device can also comprise:

Further, described device can also comprise:

Wherein, described judge module specifically can comprise:

The embodiment of the present invention also provides a kind of network equipment, and described network equipment comprises the responding device of above-described DNS query request.Described network equipment is such as: SGSN, GGSN or can carry out mutual server (the DNS booster response server in such as above-mentioned better embodiment) with gn interface.

The above is only the execution mode of the embodiment of the present invention; should be understood that; for those skilled in the art; under the prerequisite not departing from embodiment of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection range of the embodiment of the present invention.

Claims

1. a response method for DNS query request, is characterized in that, described method comprises:

2. the method for claim 1, is characterized in that, described radio network interface is the gn interface of GPRS network.

3. the method for claim 1, is characterized in that, before described generation step, described method also comprises:

4. method as claimed in claim 3, it is characterized in that, after described determining step, described method also comprises:

5. method as claimed in claim 4, is characterized in that, describedly judges whether described corresponding relation effectively specifically comprises:

6. a responding device for DNS query request, is characterized in that, described device comprises:

7. device as claimed in claim 6, it is characterized in that, described radio network interface is the gn interface of GPRS network.

8. device as claimed in claim 6, it is characterized in that, described device also comprises:

9. device as claimed in claim 8, it is characterized in that, described device also comprises:

10. device as claimed in claim 9, it is characterized in that, described judge module specifically comprises:

11. 1 kinds of network equipments, is characterized in that, comprise the responding device of the DNS query request according to any one of claim 6 to 10.