CN100502270C - Method of protocol version detection in communication system - Google Patents
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Abstract
The invention is a method of switching data in communication system, disclosing a method of detecting protocol version in communication system, improving the accuracy of the information about the highest GTP protocol version supported by a receiving-end GSN device, obtained by a protocol version detecting flow, thus preventing it from misjudging the GSN device supporting high version as a low version supporting GSN and the problem caused by this. It includes the steps: A. a transmitting end transmits low-version information that carries with the information about the highest protocol version that can be supported by it; B. a receiving end judges if the low version is consistent with the highest protocol version that can be supported by them: if yes, continue the follow-up processing; and otherwise the receiving end notifies the transmitting end to communicate by the highest version that they both can support.
Description
Technical field
The present invention relates to the switching method of signaling and data in the communication system, particularly in the code division multiple address communication system, the detection method of protocol version.
Background technology
In recent years, the communication technology has obtained fast development.That relatively more outstanding is Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access, be called for short " WCDMA ") communication system, it has characteristics such as frequency efficiency height, antijamming capability be strong, therefore become a kind of mobile communication standard after simulation standard, global system for mobile communications (Global System for mobile Communication is called for short " GSM ") standard gradually with stronger vitality and application prospect.In the digital mobile communication field, the WCDMA technology has also been played the part of the key player.
WCDMA standard network structure is divided into Access Network and core net two parts.
Core net is made up of circuit domain and packet domain.Wherein, the capital equipment of circuit domain is a mobile switching centre, is used to provide traditional, gives Circuit-switched speech business; The capital equipment of packet domain is wireless universal packet service support node (GPRS Support Node is called for short " GSN "), is used to provide based on IP packet-switched data business.The advantage that these characteristics make it compare with second generation mobile communication standard is to provide powerful high data service support.Considered backward compatible problem during in addition owing to the WCDMA standard design, therefore Access Network both can be code division multiple access (Code DivisionMultiple Access, abbreviation " CDMA ") universal mobile telecommunications system grounding wireless access network (the UMTS Terrestrial Radio Access Network of standard, be called for short " UTRAN ") standard also can be a second generation GSM standard.
The packet domain capital equipment is GSN in the core net.GSN is the general designation of GPRS serving GPRS support node (Serving GPRS Support Node is called for short " SGSN ") and gateway GPRS supporting node (GGSN) (GPRS Gateway Support Node is called for short " GGSN ").Wherein, SGSN is the central service control node of packet domain, and GGSN is the gateway node between packet domain core network and the external public network.
In communication process, between the GSN, adopt wireless universal packet service tunnel protocol (GPRS Tunneling Protocol promptly between each SGSN, and between SGSN and the GGSN, be called for short " GTP ") carry out the exchange of signaling and data, the interface between the GSN is called the Gn/Gp interface.The GTP agreement uses the UDP/IP agreement to carry.
Height two GTP protocol versions, i.e. lowest version GTP version 0 and highest version GTP version 1 have been developed at present.The protocol number of corresponding third generation partner program (3rd Generation PartnershipProject is called for short " 3GPP ") is respectively 3GPP TS 09.60 and 3GPP TS 29.060.
The message format of above-mentioned two versions is incomplete same, and uses different User Datagram Protoco (UDP) (User Datagram Protocol is called for short " UDP ") port.Lowest version GTP version 0 uses No. 3386 internetworking agreements (Internet Protocol is called for short " IP ") port, and No. 2123 IP ports are used in the signaling transmission among the highest version GTP version 1, and user data transmission is used No. 2152 IP ports.As seen highest version GTP version 1 separates the IP port of signaling transmission and user data transmission use.
For these two kinds of different versions, only support the GSN equipment of lowest version GTP version 0 can not handle the message of highest version GTP version 1, owing to also moving a large amount of lowest version GTPversion 0 equipment on the net, therefore stipulate in highest version GTP version 1 agreement: the GSN equipment of every support highest version GTPversion 1, must realize support simultaneously to lowest version GTP version 0, about the detailed description of this regulation, can be referring to agreement 3GPP TS 29.060 the 4th joint.
Because 1 performance that can provide of highest version GTP version is better than lowest version GTPversion 0 more, therefore a GSN equipment of supporting highest version GTP version 1 and lowest version GTP version 0 simultaneously is with other GSN device talk the time, need at first to determine the highest version situation of GTP that receiving terminal supports, concrete steps are such:
The first step: transmitting terminal carries out communication with message format and the receiving terminal of highest version GTP version 1;
Second step:, carry out communication with message format and the receiving terminal of lowest version GTP version 0 if transmitting terminal is not received replying of receiving terminal.
Transmitting terminal by existing protocol mechanism when the highest GTP protocol version of surveying that receiving terminal supports, may cause erroneous judgement, the GSN equipment of the highest support highest version GTP version 1 is judged as the GSN equipment of only supporting lowest version GTP version 0, thereby use lowest version GTP version 0 to carry out communication, cause the loss of partial properties with receiving terminal.
Be the explanation this point, the method to the highest GTP protocol version of the detection receiving terminal support of present use is described (can referring to agreement 3GPP TS 29.060 11.1.1 joint) below:
When the GSN equipment of supporting highest version GTP version 1 when a GSN equipment of only supporting lowest version GTPversion 0 sends the message of a highest version GTP version 1, receiving terminal should send the message of one " Version Not Supported " (version is not supported) to transmitting terminal, carry the highest GTP protocol version that this receiving terminal can be supported in this message, promptly GTP version 0.After transmitting terminal is received above-mentioned message, use lowest version GTP version 0 instead and carry out communication with receiving terminal.
In addition, because most GSN equipment of lowest version GTP version 0 of only supporting are not monitored 2123 and No. 2152 IP ports that highest version GTP version 1 uses, cause to receive and handling the message of highest version GTP version 1, also stipulated a kind of method of automatic reduction version in the therefore existing GTP protocol version detection mechanism, specifically, use highest version GTPversion 1 and receiving terminal to carry out communication and receiving terminal when not responding when GSN equipment exactly, transmitting terminal just is reduced to lowest version GTP version 0 and receiving terminal automatically and carries out communication.
Accurately obtain the highest GTP agreement support version that opposite end GSN equipment is supported in order to ensure above-mentioned version detection mode, very important condition is that the communication link between the GSN node must be definitely unimpeded in the version detection process, promptly avoids owing to reasons such as bottom physical link fault, routing failure, data congestion cause message to be dropped.
But still can not guarantee above-mentioned condition fully at present.
For example, the message of the highest version GTPversion 1 that sends to receiving terminal in the version detection process when GSN equipment is just in time owing to the reason of bottom link is dropped, no delivery attempted is during to the GTP protocol layer of receiving terminal GSN equipment, transmitting terminal will be thought the recipient by mistake and not support highest version GTP version 1 owing to the response of not receiving receiving terminal, continue to sound out thereby be reduced to lowest version GTP version 0.
If this moment is the bottom link-recovery just, receiving-transmitting sides will use lowest version GTP version 0 to carry out communication so, but in fact both sides can both support highest version GTP version 1.
Although above-mentioned situation can often not take place, can not get rid of fully.As seen present version is surveyed the problem that has accuracy.
Owing to exemplify such as top, the receiving terminal GSN equipment erroneous judgement that can support highest version GTP version 1 and lowest version GTP version 0 simultaneously can cause some serious consequences for only supporting lowest version GTP version 0, for example:
The first, in the GSN of distributed design equipment, the highest GTP that a plurality of GTP interface processing units detect same receiving terminal GTP interface supports that version may be different, therefore, need design the synchronization mechanism of more complicated in GSN equipment;
The second, with the message that may should handle highest version GTP version 1 between a pair of GSN, handle the message of lowest version GTP version 0 again;
The 3rd, in the Routing Area Update flow process of SGSN-spanning, if new side SGSN, the highest GTP protocol version that old side SGSN and GGSN support is highest version GTP version 1, and old side SGSN supports the version erroneous judgement to be lowest version GTP version 0 the highest GTP of new side SGSN, so old side SGSN is when the PDP Context that has activated to new side SGSN migrated users, having to fields such as QoS Profile in the PDP Context and TEID is the message format of lowest version GTP version 0 from the format conversion that GTP version 1 stipulates, this problem can save referring to agreement 3GPP TS 23.060 11.1.1.Bring the problem on complexity and the performance thus.
The 4th, in the Routing Area Update flow process of SGSN, if the highest GTP protocol version that new side SGSN, old side SGSN and GGSN support is highest version GTP version 1, and old side SGSN supports the version erroneous judgement to be lowest version GTP version 0 the highest GTP of new side SGSN, so old side SGSN will deactivate the PDP Context that part lowest version GTP version 0 can't support, bring loss to customer service, and bring the problem on complexity and the performance.Specifically see referring to agreement 3GPP TS 23.060 11.1.1 and save.
Summary of the invention
The technical problem to be solved in the present invention provides the protocol version detection method in a kind of communication system, make that surveying the highest GTP agreement of receiving terminal GSN equipment that flow process obtains by protocol version supports the information accuracy of version to improve, thereby the SGSN equipment erroneous judgement that prevents to support highest version is the lowest version and the problem of initiation thus.
In order to solve the problems of the technologies described above, the invention provides the protocol version detection method in a kind of communication system, comprise following steps:
The A transmitting terminal sends lowest version message to receiving terminal, the information of the highest protocol version that carries in the described lowest version message that the expression transmitting terminal can support;
The described receiving terminal of B is according to described lowest version message, judges that the version of this lowest version message is whether consistent with the highest protocol version that both sides can both support, if then receiving terminal carries out communication according to described lowest version and transmitting terminal; Otherwise the highest protocol version that described receiving terminal notice transmitting terminal uses both sides to support carries out communication.
Wherein, before described steps A, also comprise following steps:
The described transmitting terminal of D1 sends highest version message to described receiving terminal;
The described transmitting terminal of D2 judges whether not receive at the appointed time the response of described receiving terminal, if then enter step D3;
The described transmitting terminal of D3 judges whether the number of times that described highest version message resends has reached thresholding, if then enter described steps A, otherwise enters step D1.
Described step B also comprises following substep:
When the highest protocol version that can both support as the version and the both sides of this lowest version message was inconsistent, described receiving terminal abandoned described lowest version message.
Described agreement is a wireless universal packet service tunnel protocol.
Described lowest version message is the message of packet radio service tunnel protocol version 0.
In described steps A, described transmitting terminal carries the information of its highest protocol version that can support of expression in 2～4 of first bytes of head of described lowest version message.
Among the described step B, described receiving terminal is not supported message by sending version to transmitting terminal, and the highest protocol version that the notice transmitting terminal uses both sides to support carries out communication, wherein,
Described version does not support 2～4 of head first bytes of message to carry high pass that the expression both sides can both support with packet radio service tunnel protocol version information.
In described step B, described receiving terminal is by the type or the extension header of newly-increased wireless universal packet service tunnel protocol message, and the highest version that the notice transmitting terminal uses that both sides can both support is carried out communication.
Also comprise following steps:
The described transmitting terminal of C is according to the notice of receiving terminal, and the highest protocol version and the receiving terminal that use both sides to support carry out communication.
By finding that relatively technical scheme difference with the prior art of the present invention is, at first, in the lowest version message that receiving terminal sends, carries the highest protocol version that transmitting terminal can be supported at transmitting terminal; The second, when receiving terminal judged that the highest protocol version that message version and both sides from transmitting terminal can both support is inconsistent, the highest version that notice transmitting terminal use both sides can both support was carried out communication.
Difference on this technical scheme has brought comparatively significantly beneficial effect, and promptly transmitting terminal can be judged the GTP protocol version of receiving terminal GSN equipment more exactly, avoids a series of problems of judging by accident and bringing thus.
In addition, the present invention does not need the only support lowest version to current online operation, and promptly the GSN equipment of GTP version 0 is transformed, and has protected existing investment; And making full use of existing protocol, message format is only done change slightly on original basis, realize easily; In addition, can also shorten the time that version is surveyed needs consumption.
Description of drawings
Fig. 1 is that Fig. 1 is a protocol version detection method schematic diagram according to an embodiment of the invention;
Fig. 2 is a protocol version detection method schematic diagram according to another embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
The present invention wishes to guarantee that the highest GTP protocol version of all supporting according to both sides between each GSN carries out alternately, even temporarily can't set up communication on the highest version port, does not also set up session on lowest version.
At first with reference to table 1, first byte of message header form to lowest version GTP version 0 among the description protocol 3GPP TS 09.60 is stipulated.
Table 1
The 2nd～4 reservation in the table 1 do not used, full transmitting terminal should it be set to " 1 ", the recipient will ignore these 3 when handling lowest version GTP version 0 message, no matter its what value of specifically filling in.
Among the present invention, carry the highest GTP protocol version of transmitting terminal support by the reserved field of 2～4 of first bytes of lowest version GTP version 0 message header.
Specifically, for the GSN system that only supports lowest version GTP version 0, do not need change.And for the GSN system that supports highest version GTP version 1, when compatibility realizes lowest version GTPversion 0, need on the basis of 3GPP TS 09.60, do some corresponding variations: the message that sends GTP version 1 version when transmitting terminal to receiving terminal, and receiving terminal is not when responding, and transmitting terminal will be reduced to GTP version 0 version and proceed version and survey.At this moment, transmitting terminal is set to the highest GTP protocol version " 001 " that local terminal is supported with 2～4 of first bytes of GTP version0 message header.
Below in conjunction with Fig. 1, describe each step according to an embodiment of the invention in detail.Need to prove that the present invention is applicable to transmitting terminal support highest version, the i.e. situation of GTP version 1.
As shown in Figure 1, step 103: transmitting terminal sends N highest version, the i.e. message of GTP version1 version to receiving terminal.
When receiving terminal does not receive message from transmitting terminal, or response is when being dropped, and transmitting terminal is retransmitted the message of GTP version 1 version, till retransmitting number of times and reaching predefined threshold value " N ", enters step 104.
Step 104: transmitting terminal sends lowest version to receiving terminal, i.e. the message of GTP version 0 version.Wherein carry the information of the highest protocol version that the expression transmitting terminal can support.
In this step, because transmitting terminal has sent the message of the GTP version 1 of highest version for N time, and do not receive and the response from receiving terminal, reduced version in order to set up communication, continue to send message to receiving terminal.But in this message, though that use is lowest version GTP version 0, the information of the highest protocol version that has comprised in the message that the expression transmitting terminal can support.
In order to realize this step, transmitting terminal can be set to 2～4 of first bytes of head of lowest version message the highest GTP protocol version " 001 " that local terminal is supported.
Step 105: receiving terminal receives the lowest version of transmitting terminal, i.e. GTP version 0 message judges that this message version is whether consistent with the highest protocol version of GTP that both sides can both support.
That is to say, the information of the highest protocol version that receiving terminal can be supported by expression transmitting terminal entrained in the lowest version message, the version information of lowest version message itself, and the highest protocol version that oneself can support, judge the highest protocol version whether transmitting terminal has used both sides to support.
If consistent, promptly transmitting terminal has used the highest protocol version that both sides can both support, then continues subsequent treatment; Otherwise the highest protocol version that does not just use both sides to support then enters step 106.
In step 106, the highest version that receiving terminal notice transmitting terminal uses that both sides can both support is carried out communication.
In order to realize this step, in the present embodiment, receiving terminal sends lowest version to transmitting terminal, be " Version Not Supported " message of GTP version 0 form, fill in the information of the highest GTP protocol version of representing that both sides can both support in " Version " field of 2～4 of this message header first bytes: " 001 ".
Then enter step 107, in this step, transmitting terminal is according to " Version NotSupported " message that receives, determine that receiving terminal can support highest version, be the information of GTP version 1, therefore use highest version, promptly GTP version 1 version and receiving terminal carry out interacting message, do not reattempt thus to reduce the GTP protocol version.
Need to prove in addition, after transmitting terminal GSN equipment carries out interacting message with clear and definite follow-up use lowest version GTP version 0 version of receiving terminal GSN equipment, still fill in retention complete " 1 " in the 1st byte of lowest version GTP version 0 message header 2～4 (referring to table 1), the recipient fills in GTP version 0 message of position complete " 1 " to 2～4 of the 1st bytes, do not carry out version verification, normal process.
In order better to explain principle of the present invention, below according to the foregoing description, for a specific example: suppose that the highest protocol version that SGSN and GGSN support is GTP version 1, but cause SGSN when attempting with GGSN, to fail for some reason by the highest version communication, reduce to lowest version thus, promptly GTP version 0 surveys again.
According to the present invention, SGSN is in lowest version, and promptly 2～4 of first bytes of GTP version 0 message header are set to the highest GTP protocol version " 001 " that local terminal is supported.GGSN is after 3386 ports receive this request message, the highest version of finding that local terminal and opposite end can both support is higher than the lowest version of present use, just return a version and do not support message to 3386 ports of SGSN, i.e. " Version NotSupported " message, this message header first byte 2～4 " Version " is filled in the highest GTP protocol version information that both sides can both support: " 001 ", thereby the highest version that notice SGSN both can support is Version 1, the SGSN response directly uses highest version GTP version 1 and receiving terminal to carry out communication from the message of receiving terminal.
Below with reference to Fig. 2, describe in detail according to another embodiment of the invention.Present embodiment comprises following steps:
Step 201: transmitting terminal sends lowest version to receiving terminal, and promptly the message of GTP version 0 is carried the highest GTP protocol version information that transmitting terminal itself is supported in this message;
Then enter step 202, receiving terminal receives the lowest version of transmitting terminal, i.e. GTP version 0 message judges that this message version is whether consistent with the highest protocol version of GTP that both sides can both support.
In the present embodiment, receiving terminal is the highest GTP protocol version information of supporting by the transmitting terminal itself that carries in the lowest version message, the version information of lowest version message, and receiving terminal self the highest GTP protocol version information that can support is finished judgement.
If consistent, the highest GTP protocol version that the expression receiving terminal can be supported is a lowest version, therefore continues subsequent treatment; Otherwise the highest GTP protocol version that the expression receiving terminal can be supported is a highest version, then enters step 203.
In step 203, because judging the GTP protocol version that transmitting terminal uses, receiving terminal is lower than the version that both sides can both support, therefore, the highest version that receiving terminal notice transmitting terminal uses that both sides can both support is carried out communication.
Specifically, receiving terminal sends lowest version to transmitting terminal, be " Version Not Supported " message of GTP version 0 form, this message header first byte 2～4 " Version " is filled in the highest GTP protocol version information that both sides can both support: " 001 ".
After this enter step 204, in this step, transmitting terminal is according to above-mentioned " Version NotSupported " message that receives, determine that receiving terminal can support highest version, be the information of GTP version 1, therefore use highest version, promptly GTP version 1 version and receiving terminal carry out communication.
In this embodiment, transmitting terminal uses the lowest version message communicating that has the version detecting function earlier, can use the more protocol communication of highest version if receiving terminal is found both sides, then notifies transmitting terminal to use the highest version protocol communication instead.This way can be saved among the previous embodiment owing to receiving terminal is not supported transmitting terminal that highest version communication protocol causes the repeatedly time and the resource overhead of retry, is applicable to the more situation of equipment of only supporting lowest version in the system.
Based on technology of the present invention to the above-mentioned background technology and in implementing, be not difficult to find, in the GTP protocol version detecting strategy in background technology, transmitting terminal reduces version automatically when receiving terminal does not respond way does not have problem, to be the recipient receiving transmit leg when reducing GTP version 0 message that sends behind the version to the principal element that causes erroneous judgement, think that the highest protocol version of GTP of transmit leg support is consistent with the version of the message of transmission, thereby agree to use lower GTP version 0 version and transmit leg to carry out communication.
In the present invention, when transmitting terminal is reducing the GTP protocol version when receiving terminal sends the message of lowest version, the highest GTP protocol version information that transmitting terminal can be supported is arranged on and brings the recipient in the message simultaneously, therefore, receiving terminal is after receiving the message of lowest version, can know that the highest GTP protocol version that in fact opposite end is supported is GTP version 1, if recipient's oneself the highest GTP agreement supports that version also is GTP version 1, the recipient just can judge that the highest protocol version that both sides can support is GTP version 1 so, and use the message informing transmit leg, require the other side to use GTP version 1 to carry out interacting message.
Though by reference some preferred embodiment of the present invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that, can do various changes to it in the form and details, and the spirit and scope of the present invention that do not depart from appended claims and limited.For example, can introduce new extension header type at GTP version 1 above version substitutes and to use the 1st 2～4 of byte of GTPversion 0 version message to identify the highest support version of local terminal in this programme
Claims (9)
1. the protocol version detection method in the communication system is characterized in that, comprises following steps:
The A transmitting terminal sends lowest version message to receiving terminal, the information of the highest protocol version that carries in the described lowest version message that the expression transmitting terminal can support;
The described receiving terminal of B is according to described lowest version message, judges that the version of this lowest version message is whether consistent with the highest protocol version that both sides can both support, if then receiving terminal carries out communication according to described lowest version and transmitting terminal; Otherwise the highest protocol version that described receiving terminal notice transmitting terminal uses both sides to support carries out communication.
2. the protocol version detection method in the communication system according to claim 1 is characterized in that, before described steps A, also comprises following steps:
The described transmitting terminal of D1 sends highest version message to described receiving terminal;
The described transmitting terminal of D2 judges whether not receive at the appointed time the response of described receiving terminal, if then enter step D3;
The described transmitting terminal of D3 judges whether the number of times that described highest version message resends has reached thresholding, if then enter described steps A, otherwise enters step D1.
3. the protocol version detection method in the communication system according to claim 1 is characterized in that, described step B also comprises following substep:
When the highest protocol version that can both support as the version and the both sides of this lowest version message was inconsistent, described receiving terminal abandoned described lowest version message.
4. the protocol version detection method in the communication system according to claim 1 is characterized in that, described agreement is a wireless universal packet service tunnel protocol.
5. the protocol version detection method in the communication system according to claim 4 is characterized in that, described lowest version message is the message of packet radio service tunnel protocol version 0.
6. the protocol version detection method in the communication system according to claim 5, it is characterized in that, in described steps A, described transmitting terminal carries the information of its highest protocol version that can support of expression in 2～4 of first bytes of head of described lowest version message.
7. the protocol version detection method in the communication system according to claim 5 is characterized in that, among the described step B, described receiving terminal is not supported message by sending version to transmitting terminal, the highest protocol version that the notice transmitting terminal uses both sides to support carries out communication, wherein
Described version does not support 2～4 of head first bytes of message to carry high pass that the expression both sides can both support with packet radio service tunnel protocol version information.
8. the protocol version detection method in the communication system according to claim 3, it is characterized in that, in described step B, described receiving terminal is by the type or the extension header of newly-increased wireless universal packet service tunnel protocol message, and the highest version that the notice transmitting terminal uses that both sides can both support is carried out communication.
9. the protocol version detection method in the communication system according to claim 1 is characterized in that, also comprises following steps:
The described transmitting terminal of C is according to the notice of receiving terminal, and the highest protocol version and the receiving terminal that use both sides to support carry out communication.
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| US7685291B2 (en) | 2005-11-08 | 2010-03-23 | Mediatek Inc. | Messaging service interoperability methods and related devices |
| CN101018231B (en) * | 2007-02-07 | 2010-05-26 | 重庆重邮信科通信技术有限公司 | A detection method for self-adapted protocol version |
| CN101742700A (en) * | 2008-11-27 | 2010-06-16 | 华为技术有限公司 | Method, device and system for confirming version information |
| CN106933546A (en) * | 2015-12-29 | 2017-07-07 | 施耐德电器工业公司 | Device, method and apparatus for supporting the power system file of at least two versions |
| CN109428773B (en) * | 2017-08-22 | 2022-04-22 | 深圳市道通智能航空技术股份有限公司 | Communication method and device |
| CN115038052A (en) * | 2022-06-02 | 2022-09-09 | 阿波罗智联(北京)科技有限公司 | Message set processing method, device, equipment and storage medium |
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| Title |
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| 3GPP TS 09.60 V7.9.0. . 2002 |
| 3GPP TS 09.60 V7.9.0. . 2002 * |
| 3GPP TS 23.060 V6.1.0. . 2003 |
| 3GPP TS 23.060 V6.1.0. . 2003 * |
| 3GPP TS 29.060 V5.0.0. . 2001 |
| 3GPP TS 29.060 V5.0.0. . 2001 * |
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