CN1668024A - A data transmission method between GPRS network terminal and IP network equipment - Google Patents
A data transmission method between GPRS network terminal and IP network equipment Download PDFInfo
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- CN1668024A CN1668024A CNA200410008447XA CN200410008447A CN1668024A CN 1668024 A CN1668024 A CN 1668024A CN A200410008447X A CNA200410008447X A CN A200410008447XA CN 200410008447 A CN200410008447 A CN 200410008447A CN 1668024 A CN1668024 A CN 1668024A
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Abstract
This invention provides a method for transmitting data between a GPRS network terminal and IP network device, which pre-sets a corresponding relation between identification of each area and its attributed IP network side server of a PRS network on GGSN. When a GPRS mobile terminal sends data to IP network, the method includes: A GPRS mobile terminal uses its own IP address as the source address and uses general IP address as the destination address to deliver a data packet to SGSN. B SGSN receives the packet and adds the identification of the GPRS mobile terminal in GPRS network area in said IP data packet and sends it to GGSN, which extracts the area identification from the IP data packet, looks for IP address of the IP network side server and replaces the general IP address with the server IP address to send the IP data packet to IP network side to be transmitted to the IP network side server.
Description
Technical field
The present invention relates to technical field of data transmission, be meant the method for transfer of data between a kind of GPRS network terminal and the IP network equipment especially.
Background technology
Present dispatching services adopts is dispatch network based on voice transfer, and this dispatch network is difficult to realize the transmission of data service.Along with development of telecom technology, this pure voice scheduling can't satisfy the more demand of people.For example, be difficult to realize the transmission of data such as travel route figure, video file in the existing dispatching services scheduling process.
Use GPRS (GPRS) network and IP network to set up dispatch network, can realize the transmission of data service easily.Sending in the process of data to IP network by GPRS, because the characteristics of dispatching services are relevant with the current position of user, therefore when customer location changes, provide the IP network side server of service that conversion may take place, both sides may and not know the other side's IP address in this case.Fig. 1 is a railway dispatching system, and promptly the networking schematic diagram of Vehicle mounted station and dispatching desk illustrates this situation as example.
This dispatching patcher comprises Vehicle mounted station, GPRS service node (SGSN), the GPRS gateway node (GGSN) of GPRS side, the dispatching desk of IP network side.SGSN is the line of demarcation of wireless portion and GPRS data network part, is in charge of moving of GPRS portable terminal, and by GRPS tunnel protocol (GTP, GPRS Tunnel Protocol) and GGSN transmission data.GGSN is the line of demarcation of GPRS network and IP network, realizes the function of gateway.By SGSN and GGSN GPRS portable terminal and IP network terminal are coupled together, realize wireless data transmission.
Vehicle mounted station is meant the portable terminal of the responsible collection train operation data that are contained on the train and the instruction of operation dispatching platform, and Vehicle mounted station can be understood as the GPRS portable terminal of common meaning.Vehicle mounted station carries out data communication by GPRS network and dispatching desk.Dispatching desk is meant that the Vehicle mounted station to being contained on the train carries out data collection and the following control centre that sends instructions, and is appreciated that into the server of the IP network side of common meaning.Each dispatching desk is administered some sub-districts, and as shown in the figure: dispatching desk A administers sub-district A, B, and dispatching desk B administers sub-district C, D.The Vehicle mounted station that enters the compass of competency will be subjected to the control of corresponding dispatching desk.
For dispatching desk, because the each carry of Vehicle mounted station possibility is on different train numbers, when therefore issuing data, and unclear current train number employed be which Vehicle mounted station, just know the train number or the engine number at the object place that will send, here train number or engine number are called function number, function number can be interpreted as that dispatching patcher distributes to the specific identity that the Vehicle mounted station of finishing certain function is a portable terminal, one of them function number can be distributed to a plurality of Vehicle mounted stations and use, but this function number is only distributed to a Vehicle mounted station and used at one time.And, in train driving, may cross over the zone that different dispatching desks is administered for Vehicle mounted station, therefore and which the dispatching desk control of originally experiencing when not knowing to run to current region.
At present, when communicating by IP packet transmission data, transmit leg need be known recipient's IP address, just the IP data envelope can be installed, and sends to the destination.
But as can be known by last analysis, for dispatching patcher, because Vehicle mounted station and dispatching desk all may change, and this variation can't be known for data receiver, during therefore as if employing fixed ip address encapsulation IP packet, just have to specify in advance Vehicle mounted station and dispatching desk.For example,, its appointment is only used on certain train, done making that the use of Vehicle mounted station is very dumb like this for certain Vehicle mounted station; And for dispatching desk, have to adopt the networking of client/server (Client/Server) mode, dispatching desk and Vehicle mounted station as Server carry out communication, other each subdispatch platforms are as Client, communicate by letter with Vehicle mounted station by Server, networking is cumbersome, and Server might become the bottleneck of transfer of data.
Summary of the invention
In view of this, main purpose of the present invention is to provide the method for transfer of data between a kind of GPRS network terminal and the IP network equipment, makes data receiver needn't know destination address, can realize that transfer of data arrives corresponding data receiver.
Realize the present invention, the method for transfer of data between described GPRS network terminal and the IP network equipment is in advance at the corresponding relation that sets in advance the IP network side server under each cell ID of GPRS network and the sub-district on the GGSN; When the GPRS portable terminal sent data to IP network, this method comprised:
A, GPRS portable terminal use its own IP address as source address, use the general purpose I P address to send the IP packet as destination address to SGSN;
B, SGSN receive the IP packet, and the sign of GPRS network sub-district, the current place of GPRS portable terminal is added in the described IP packet, send to GGSN;
C, GGSN extract cell ID from the IP packet, search the IP address of the IP network side server under the sub-district, and after the general purpose I P address replaced with this server ip address, the IP packet are sent to the IP network side, send IP network side server to.
Wherein, when the GPRS portable terminal received the IP data of IP network transmission, this method further comprised step behind step C:
D, GGSN receive after IP network side server transmission IP data, and judging is the IP data of response of step C, and the source address in the IP packet is replaced with the general purpose I P address, then the IP packet is sent to SGSN; Described source address is the IP address of IP network side server;
E, SGSN send to the GPRS portable terminal with the IP packet according to destination address; Described destination address is the IP address of GPRS portable terminal.
Wherein, set in advance User Datagram Protoco (UDP)/transmission control protocol UDP/TCP port numbers of using when IP network is responded the IP data, the step of the described judgement of step D is: judge whether employed UDP/IP port numbers is the described UDP/TCP port numbers of using when IP network is responded the IP data that sets in advance.
Wherein, the corresponding relation of GPRS mobile terminal function number and its IP address is set on GGSN in advance, the described GPRS terminal of steps A its own IP address is: the IP address of this function correspondence that the GPRS portable terminal obtains from GGSN according to the function of being distributed number.
Wherein, described GPRS portable terminal comprises from the step that GGSN obtains the IP address of this function correspondence according to the function of being distributed number: the GPRS portable terminal by SGSN to GGSN sending function information, GGSN number changes out corresponding IP address according to function, and returns the IP address information and give the GPRS portable terminal.Wherein, described function number is carried with the username field (UserName) of PDP Context information.
Wherein, the described cell ID of step B is added in the IP packet and is: cell ID is added in the GPRS Tunnel Protocol user face GTP-U of IP packet.
Wherein, it is characterized in that described GPRS portable terminal is a Vehicle mounted station, IP network side server is a dispatching desk.
By said method as can be seen, the method for transfer of data between GPRS network terminal provided by the invention and the IP network equipment has been utilized functional addressing and location addressing method, solves the restriction that must know destination address before data send.Use method of the present invention, for the GPRS portable terminal that is not easy to distribute fixing IP receive ip network number according to the time, and the GPRS portable terminal can't learn under the situation of receiving terminal IP address of IP network end, can realize the normal transmission and the reception of data.
When the present invention is applied to dispatch network, can on the basis of voice scheduling, realize transfer of data, thereby the scheduling mode that makes is more flexible, for example issues travel route figure in the scheduling process, or the distribution map of other relevant special objects, perhaps data such as Operating Guideline image or video.
Description of drawings
Fig. 1 is a railway dispatching system networking schematic diagram.
Fig. 2 obtains IP address flow chart for Vehicle mounted station.
Fig. 3 is that Vehicle mounted station and dispatching desk transmit data flowchart.
Embodiment
Be that example describes still below with the described railway dispatching system of background technology.
For dispatching desk, what managed is at train number, and for Vehicle mounted station, known to its user also is train number.Therefore the corresponding relation of pre-configured train number and IP address on the dispatching desk of the present invention in GGSN and IP network can be certain fixing algorithm, perhaps look-up method.When certain Vehicle mounted station was applied to certain train number train, GGSN used to current Vehicle mounted station the IP address assignment of this train number correspondence.At dispatching desk, then obtain distributing to the IP address of Vehicle mounted station by identical algorithm.As can be seen, it is relevant with running number that Vehicle mounted station obtains the mode of IP address, will be called functional addressing by the method that running number obtains the IP address here.
Fig. 2 obtains IP address flow chart for Vehicle mounted station.Referring to Fig. 2, Vehicle mounted station obtains the IP address and may further comprise the steps:
Step 201: Vehicle mounted station is sent out PDP to SGSN and is activated request (PDP Context Active Req) message, comprises user name (UserName) field in the message, and UserName is set to running number in this example, as 12220.
After step 202:SGSN receives PDP Context Active Req message, set up PDP request (Create PDP Context Req) message to the GGSN transmission, the UserName that comprises in the message is set to running number 12220.
Step 203:GGSN receives Create PDP Context Req, extract UserName, give the IP address of this UserName running number correspondence according to fixedly algorithm assigns recited above, in addition, also can realize described algorithm by far-end access authentication server (RADIUS Server) or the Dynamic Host Configuration Protocol server entities such as (DHCP Server) of being responsible for address assignment.Wherein, described algorithm can be: with the part of running number as the network address, add that legal network segment address forms IP, obtain 10.145.12.220 as 12220 train numbers are added legitimate network address 10.145.Then, GGSN sets up PDP response (Create PDP Context Rsp) to the SGSN loopback, is included as corresponding Vehicle mounted station institute's IP address allocated (10.145.12.220) in this message.
Step 204:SGSN activates response (PDP Context Active Rsq) to Vehicle mounted station loopback PDP, and PDP Context sets up successfully, has successfully set up the PDP logical channel.Comprise institute's IP address allocated (10.145.12.220) in the message simultaneously, Vehicle mounted station obtains institute's IP address allocated.
On the other hand, when dispatching desk was running number 12220 transmission data to UserName, the algorithm that the dispatching desk basis is identical with GGSN obtained distributing to the IP address 10.145.12.220 of Vehicle mounted station, and dispatching desk sends data as purpose IP address to Vehicle mounted station with this.
Through above step, dispatching desk just can send data to this Vehicle mounted station.For Vehicle mounted station, along with travelling of train may be crossed over the zone that different dispatching desk is administered, Vehicle mounted station is when dispatching desk sends data and do not know to issue which concrete dispatching desk.Fig. 3 is that Vehicle mounted station and dispatching desk transmit data flowchart.With reference to Fig. 3, the flow process of using general destination address to send data to Vehicle mounted station describes.Because it is relevant with the position at the present place of Vehicle mounted station that data send, will be called location addressing according to the method that the position obtains purpose IP address here.
Step 301: Vehicle mounted station as 10.145.255.245, sends IP packet to SGSN according to default dispatching desk general purpose I P address.Wherein in this IP packet, source address is the IP address 10.145.12.220 of Vehicle mounted station actual allocated, and destination address is dispatching desk general purpose I P address such as 10.145.12.245.
Step 302:SGSN receives the IP packet that Vehicle mounted station sends, and sends the IP packet to GGSN by the GTP tunnel agreement, and increases the Cell ID of the sub-district at the current place of Vehicle mounted station in the GTP-U extension header of packaged GTP packet.Wherein, Vehicle mounted station can be to the Cell ID of sub-district, the current place of SGSN real-time report.
Step 303:GGSN receives also and extracts the IP packet, after judging purpose IP address and being the dispatching desk general address, carries out data address and is redirected, and details are as follows.
At first, GGSN receives the IP packet that SGSN sends by the GTP agreement, and from the GPRS tunnel user plane (GTP-U of GTP packet, GPRS Tunnel Protocol User plan) obtains Cell ID in the extension header, inquire about the Cell ID that self writes down and the allocation list of dispatching desk then, obtain the dispatching desk address of Cell ID correspondence, as 10.145.2.15, and with general purpose I P address in the substitute I P packet of this IP address; Send this IP packet to IP network then.Write down the corresponding relation of Cell ID and dispatching desk in the wherein said allocation list, shown the affiliated dispatching desk of Cell ID.
When the IP packet that Vehicle mounted station is sent when dispatching desk responded, in the IP packet of loopback, destination address was Vehicle mounted station address 10.145.12.220, and source address is for being dispatching desk actual address 10.145.2.15; And the employed User Datagram Protoco (UDP)/transmission control protocol of given transmission response data (UDP/TCP) port numbers, receive the employed fixed port of response data as location addressing, as using the bbb port.Transport layer at the TCP/IP reference model, indicated the service that application layer provided by the UDP/TCP port numbers, for example Chang Yong No. 21 ports are corresponding with ftp, 23 ports are corresponding with telnet, and the present invention is response datas of location addressing by the data of using predetermined UDP/TCP port numbers to indicate application layer promptly.
After GGSN receives the IP packet, check the employed port numbers of UDP/TCP of this IP packet, if be the fixed port of location addressing, then source address is replaced with dispatching desk general address 10.145.255.245, then, the IP packet is sent to SGSN, and send to Vehicle mounted station by SGSN.Wherein, can distinguish by described UDP/TCP port numbers is the response data of dispatching desk, or dispatching desk initiatively mails to the data of Vehicle mounted station under other situations, only when being response data, the dispatching desk IP that carries is replaced with the general purpose I P address.Concerning Vehicle mounted station, be only the complete procedure of the transmission and the reception of data like this.
From last example as can be seen, when Vehicle mounted station sends data, use general purpose IP address, when therefore sending data, transmit leg is that Vehicle mounted station needn't be known purpose IP, can realize that data normally send to dispatching desk.Also replace with described general destination address for the source address in the IP packet that is responded, Vehicle mounted station correctly being discerned received these data is response data, finishes data and sends receiving course.
The method of the invention is not limited to above-mentioned dispatching desk/Vehicle mounted station, can be applicable to and function number, the similar situation of location-dependent services.For example, for the public service that unified number is provided, as unified number is the fire alarm number, use described method, after portable terminal uses the general address of appointment to send data, can connect by fire protection control center automatic and that sub-district, portable terminal place is affiliated, thereby the portable terminal of fire protection control center to the sub-district, place of realizing different districts provides service.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1, the method for transfer of data between a kind of GPRS network terminal and the IP network equipment is characterized in that, at the corresponding relation that sets in advance the IP network side server under each cell ID of GPRS network and the sub-district on the GGSN; When the GPRS portable terminal sent data to IP network, this method comprised:
A, GPRS portable terminal use its own IP address as source address, use the general purpose I P address to send the IP packet as destination address to SGSN;
B, SGSN receive the IP packet, and the sign of GPRS network sub-district, the current place of GPRS portable terminal is added in the described IP packet, send to GGSN;
C, GGSN extract cell ID from the IP packet, search the IP address of the IP network side server under the sub-district, and after the general purpose I P address replaced with this server ip address, the IP packet are sent to the IP network side, send IP network side server to.
2, method according to claim 1 is characterized in that, when the GPRS portable terminal received the IP data of IP network transmission, this method further comprised step behind step C:
D, GGSN receive after IP network side server transmission IP data, and judging is the IP data of response of step C, and the source address in the IP packet is replaced with the general purpose I P address, then the IP packet is sent to SGSN; Described source address is the IP address of IP network side server;
E, SGSN send to the GPRS portable terminal with the IP packet according to destination address; Described destination address is the IP address of GPRS portable terminal.
3, method according to claim 2, it is characterized in that, set in advance User Datagram Protoco (UDP)/transmission control protocol UDP/TCP port numbers of using when IP network is responded the IP data, the step of the described judgement of step D is: judge whether employed UDP/IP port numbers is the described UDP/TCP port numbers of using when IP network is responded the IP data that sets in advance.
4, method according to claim 1, it is characterized in that, the corresponding relation of GPRS mobile terminal function number and its IP address is set on GGSN in advance, and the described GPRS terminal of steps A its own IP address is: the IP address of this function correspondence that the GPRS portable terminal obtains from GGSN according to the function of being distributed number.
5, method according to claim 4 is characterized in that, described GPRS portable terminal comprises from the step that GGSN obtains the IP address of this function correspondence according to the function of being distributed number:
To GGSN sending function information, GGSN number changes out corresponding IP address according to function to the GPRS portable terminal by SGSN, and returns the IP address information and give the GPRS portable terminal.
6, method according to claim 5 is characterized in that, described function number is carried with the username field (UserName) of PDP Context information.
7, method according to claim 1 is characterized in that, the described cell ID of step B is added in the IP packet and is: cell ID is added in the GPRS Tunnel Protocol user face GTP-U of IP packet.
8, method according to claim 1 is characterized in that, described GPRS portable terminal is a Vehicle mounted station, and IP network side server is a dispatching desk.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200410008447XA CN100372339C (en) | 2004-03-10 | 2004-03-10 | A data transmission method between GPRS network terminal and IP network equipment |
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| CNB200410008447XA CN100372339C (en) | 2004-03-10 | 2004-03-10 | A data transmission method between GPRS network terminal and IP network equipment |
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| CN1668024A true CN1668024A (en) | 2005-09-14 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101119315B (en) * | 2007-09-17 | 2010-07-14 | 当代天启技术（北京）有限公司 | Data transmission method, system and gateway in control network |
| CN102316521A (en) * | 2011-09-15 | 2012-01-11 | 电信科学技术研究院 | Data transmission method, system and equipment |
| CN101583086B (en) * | 2009-06-19 | 2012-08-01 | 广州市中海达测绘仪器有限公司 | Method for controlling data interaction among mobile terminals and system thereof |
| CN102665239A (en) * | 2012-05-16 | 2012-09-12 | 大唐移动通信设备有限公司 | Mobile communication teaching system and PS (Packet Switch) service data processing method |
| CN102869043A (en) * | 2011-07-07 | 2013-01-09 | 上海中科高等研究院 | Data transfer method of wireless local area network (WLAN) based rail communication system |
| CN103262506A (en) * | 2010-10-22 | 2013-08-21 | 瑞典爱立信有限公司 | Mobile-access information based adaptation of network address lookup for differentiated handling of data traffic |
| US9237480B2 (en) | 2010-10-22 | 2016-01-12 | Telefonaktiebolaget L M Ericsson (Publ) | Accelerated content delivery |
| CN110311992A (en) * | 2019-05-31 | 2019-10-08 | 上海赫千电子科技有限公司 | The functional addressing method of the unified diagnostic service of automobile Ethernet |
| CN112154633A (en) * | 2018-05-16 | 2020-12-29 | 华为技术有限公司 | Receiving device and transmission device for TCP communication |
| US11490443B2 (en) | 2016-03-28 | 2022-11-01 | Datang Mobile Communications Equipment Co., Ltd. | Data transmission method and apparatus, and session management device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI109950B (en) * | 2000-01-20 | 2002-10-31 | Nokia Corp | Address Acquisition |
| EP1137300A1 (en) * | 2000-03-20 | 2001-09-26 | Alcatel | Transmission of location information of a mobile station in a gprs/internet environment |
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2004
- 2004-03-10 CN CNB200410008447XA patent/CN100372339C/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101119315B (en) * | 2007-09-17 | 2010-07-14 | 当代天启技术（北京）有限公司 | Data transmission method, system and gateway in control network |
| CN101583086B (en) * | 2009-06-19 | 2012-08-01 | 广州市中海达测绘仪器有限公司 | Method for controlling data interaction among mobile terminals and system thereof |
| US9313797B2 (en) | 2010-10-22 | 2016-04-12 | Telefonaktiebolaget Lm Ericsson (Publ) | Mobile-access information based adaptation of network address lookup for differentiated handling of data traffic |
| CN103262506A (en) * | 2010-10-22 | 2013-08-21 | 瑞典爱立信有限公司 | Mobile-access information based adaptation of network address lookup for differentiated handling of data traffic |
| US9237480B2 (en) | 2010-10-22 | 2016-01-12 | Telefonaktiebolaget L M Ericsson (Publ) | Accelerated content delivery |
| CN102869043A (en) * | 2011-07-07 | 2013-01-09 | 上海中科高等研究院 | Data transfer method of wireless local area network (WLAN) based rail communication system |
| CN102869043B (en) * | 2011-07-07 | 2015-10-28 | 中国科学院上海高等研究院 | A kind of data relay method of the rail communication system based on WLAN |
| CN102316521A (en) * | 2011-09-15 | 2012-01-11 | 电信科学技术研究院 | Data transmission method, system and equipment |
| US9402176B2 (en) | 2011-09-15 | 2016-07-26 | China Academy Of Telecommunications Technology | Method, system and device for transmitting data |
| CN102665239A (en) * | 2012-05-16 | 2012-09-12 | 大唐移动通信设备有限公司 | Mobile communication teaching system and PS (Packet Switch) service data processing method |
| CN102665239B (en) * | 2012-05-16 | 2014-12-10 | 大唐移动通信设备有限公司 | Mobile communication teaching system and PS (Packet Switch) service data processing method |
| US11490443B2 (en) | 2016-03-28 | 2022-11-01 | Datang Mobile Communications Equipment Co., Ltd. | Data transmission method and apparatus, and session management device |
| CN112154633A (en) * | 2018-05-16 | 2020-12-29 | 华为技术有限公司 | Receiving device and transmission device for TCP communication |
| CN110311992A (en) * | 2019-05-31 | 2019-10-08 | 上海赫千电子科技有限公司 | The functional addressing method of the unified diagnostic service of automobile Ethernet |
| CN110311992B (en) * | 2019-05-31 | 2020-07-03 | 上海赫千电子科技有限公司 | Function addressing method for unified diagnosis service of automobile Ethernet |
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| CN100372339C (en) | 2008-02-27 |
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