CN101420369A - Packet transmission method, system and device for general packet wireless service tunnel protocol - Google Patents

Packet transmission method, system and device for general packet wireless service tunnel protocol Download PDF

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CN101420369A
CN101420369A CN 200710182051 CN200710182051A CN101420369A CN 101420369 A CN101420369 A CN 101420369A CN 200710182051 CN200710182051 CN 200710182051 CN 200710182051 A CN200710182051 A CN 200710182051A CN 101420369 A CN101420369 A CN 101420369A
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network element
gtp
multiplexed
datagram
protocol massages
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谭仕勇
倪慧
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN 200710182051 priority Critical patent/CN101420369A/en
Priority to PCT/CN2008/072815 priority patent/WO2009056061A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
    • H04L69/168—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP] specially adapted for link layer protocols, e.g. asynchronous transfer mode [ATM], synchronous optical network [SONET] or point-to-point protocol [PPP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]

Abstract

The embodiment of the present invention discloses a general packet radio service (GPRS) tunnel protocol (GTP) message transmission method. The method comprises steps of a first network element packaging more than one GTP message into a same IP datagram by using a multiplex method; The first network element sends the packaged IP datagram to a second network element. The embodiment of the present invention also discloses a GTP message transmission system and a device. By using the method, the system and the device of the present invention, the proportion of effective load data in the IP datagram is improved in the GTP message transmission process.

Description

General packet wireless service tunnel protocol message transmitting method, system and equipment
Technical field
The present invention relates to mobile communication technology, particularly a kind of GPRS (GPRS, General Packet Radio Service) tunnel protocol (GTP, GPRS Tunneling Protocol) message transmitting method, system and equipment.
Background technology
Current, the GPRS technology has obtained extensive use in cordless communication network.The GRPS network passes through at original global system for mobile communications (GSM, Global System for Mobile communication) introduces group data technology in, realized packet data transmission end to end, for the user provides the more COS of horn of plenty, as web page browsing, file download and game on line etc.
Fig. 1 is existing GPRS network configuration diagram.As shown in Figure 1, existing GPRS network framework mainly comprises: GPRS serving GPRS support node (SGSN, Serving GPRS Support Node), GGSN (GGSN, Gateway GPRS Support Node) and attaching position register (HLR, Home Location Register).
Wherein: SGSN, be used for realizing the signaling transmission of packet switching, and be used for the processing and the transmission of packet, the abilities such as mobile management, safety management, access control and Route Selection to the user are provided.
GGSN is responsible for being connected of GPRS network and multiple external data network, as, the Internet (Internet), enterprise network and network etc. X.25; GGSN is the gateway that is positioned at GPRS backbone network and external data network, is the transmission channel between GPRS network and the external data network.
HLR is used to store user's GPRS CAMEL-Subscription-Information and routing iinformation; GGSN links to each other with HLR respectively with SGSN, obtains user's subscription data from HLR; When the user roamed, SGSN may be positioned at different networks with HLR.
Carry out information interaction by gn interface between SGSN and the GGSN.Gn interface adopts IP-based GTP agreement to communicate, and provides grouped data to wrap in the mechanism that transmits by the GTP tunnel agreement between the GPRS Support Node (GSN), static state or dynamic routing protocol in the general support region.
GGSN be positioned at different public land mobile network (PLMN, Public Land MobileNetwork) GSN in, Universal Mobile Telecommunications System (UMTS as shown in fig. 1, UniversalMobile Telecommunications System) carries out information interaction by gp interface between the SGSN in the land radio access web (UTRAN, UMTS TerrestrialRadio Access Network).The gp interface decapacitation provides outside the function of gn interface, has also increased the interconnected required safety function of PLMN, and to the support of inter-domain routing protocol, as Border Gateway Protocol (BGP, Border Gateway Protocol) etc.
Other network element shown in Figure 1 and interface are mainly used in provides wireless access and professional control ability, is not described herein.
In actual applications, can use various protocols when carrying out transfer of data between two network nodes, these agreements are combined according to hierarchical sequence, constitute protocol stack.Information to be transmitted repeatedly encapsulates and decapsulation by protocol stack, to realize low layer transmission means transparent to high level.As shown in Figure 2, Fig. 2 is Gn or gp interface protocol stack schematic diagram between the existing GSN.The function of each layer protocol in this protocol stack is as follows:
The L1 agreement: the physical layer transmission agreement, the concrete physical technique that is adopted with transmission is relevant.
The L2 agreement: data link layer protocol, functions such as the foundation of data link and dismounting are provided, realize EDC error detection and correction to data; Available protocol type comprises Ethernet and asynchronous transfer mode (ATM, Asynchronous Transfer Mode) etc.; Ethernet with extensive use is an example, the Internet engineering duty group (IETF, Internet Engineering Task Force) defined the encapsulation format of ethernet frame in the draft standard of Zhi Dinging (RFC, Request ForComments) 894, as shown in Table 1:
Figure A200710182051D00081
Table one ethernet frame encapsulation format
As can be seen from Table I, the additional information length in each ethernet frame is 18 bytes, comprises 6 bytes of destination address, 6 bytes of source address, 2 bytes of type and 4 bytes of check number; In addition, also need the transmission time slot of at least 12 bytes and the sync bit of 8 bytes in every frame.
The IP agreement, network interconnection agreement is mainly finished routing function, is used for the route of user data and signaling; The opening of IP agreement makes does not have necessary relation between the bearer network of the application on upper strata and lower floor, application service and bearer network technology can according to separately independently direction develop; Present IP agreement mainly comprises IPv4 and two versions of IPv6; As shown in Table 2, table two is existing IPv4 message format:
Table two IPv4 message format
Option part in the message of IPv4 shown in the table two can not used generally speaking.For not comprising option portion
The common IPv4 datagram of dividing, its head length is 20 bytes altogether.The head length of IPv6 datagram is generally 40 bytes.
User Datagram Protoco (UDP) (UDP, User Datagram Protocol) provides non-connection-oriented, insecure data transmission link; Udp protocol did not need to connect before transfer of data, and the reliability of transmission data guarantees by upper layer application; As shown in Table 3, table three is existing UDP message format:
Figure A200710182051D00092
Table three UDP message format
By table three as seen, the length of UDP header is 8 bytes.
The GTP agreement is mainly used in transmission user grouped data and tunnel management information between GSN, as tunnel foundation, release and maintenance etc., is carried on the udp protocol.
Existing GTP agreement can mainly can be divided into three types: the chain of command GTP agreement GTP-C that is used for control channel, the user's face GTP agreement GTP-U that is used for the transmitting user data message, and at the charging data function entity (CDF of charge system, Charging Date Function) GTP ' agreement of using and between the charging gateway function body (CGF, Charging Gateway Function).The GTP agreement allows the various protocols bag, as IP, X.25 packet etc. transmits by tunnel style between GSN.
In addition, the GTP agreement also can be applied to the communication between other network entity, as UTRAN and SGSN, 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) System Architecture Evolution (SAE, System Architecture Evolution) home (e) node (eNodeB) in and gateway (S-GW, Serving Gateway), and between S-GW and the public data network gateway (P-GW, public-data networks Gateway) etc.
As shown in Table 4, table four is existing GTP message format:
Figure A200710182051D00101
Table four GTP message format
Table four is depicted as and does not generally comprise prolate-headed GTP protocol massages form, by table four as seen, does not comprise that prolate-headed GTP header length is 8 bytes; If comprise extension header, its head length will be looked concrete condition to be increased.
Based on above-mentioned introduction, when Fig. 3 transmitted data for the existing GTP of employing protocol massages, data entered the encapsulation process schematic diagram of protocol stack.Suppose that the IP agreement among Fig. 3 is IPv4, the L2 agreement is an Ethernet protocol.As shown in Figure 3, at transmitting terminal, according to the agreement of using in the protocol stack, carry out repeatedly encapsulation process according to order from high to low, the most packaged ethernet frame sends via physical equipment in physical layer; At receiving terminal, carry out corresponding decapsulation process according to order from low to high, finally obtain the application data that sent, thereby realize the communication of equipment room.When the GTP protocol type of transmission was GTP-C, the destination slogan that encapsulates in the UDP head was 2123; When the GTP protocol type of transmission was GTP-U, the destination slogan that encapsulates in the UDP head was 2152; When the GTP protocol type of transmission was GTP ', the destination slogan that encapsulates in the UDP head was 3386.
As seen in Figure 3, in existing GTP message transmissions mechanism, can only encapsulate a GTP protocol massages in the UDP message, same, an IP message also can only encapsulate a UDP message.As shown in Figure 3, because in encapsulation process, each layer all will add the Protocol Control Information of certain-length, first-class as UDP head, IP, therefore, for the less service application of single GTP message length, ratio regular meeting shared in the message of its effective load data after encapsulation is very little, thereby causes the reduction of network transmission efficiency.
Illustrate: for the voice communication of adopting GSM-adaptive multi-rate (AMR, Adaptive Muti-Rate) coded format, its code check is generally 4.75Kbps～12.2Kbps, and the sampling interval is 20ms.So, suppose that average bit rate is 8Kbps, then each speech frame comprises 160bit altogether, i.e. 20 bytes.Suppose that this voice communication carries out according to existing typical voice transfer mode shown in Figure 4, the structure that wherein further comprises speech data shown in Figure 4, RTP (RTP, Real Time TransportProtocol), UDP and IPv4 in the tunnel, GTP-U agreement upper strata.For whole voice communication course, transmitting terminal at first is encapsulated as the IPv4 datagram format in tunnel, GTP-U agreement upper strata with speech data, and then sends to receiving terminal after this IPv4 datagram encapsulated according to mode shown in Figure 3; Receiving terminal carries out decapsulation, obtains the IPv4 datagram that is sent.Wherein, the form of RTP message is as shown in Table 5:
Table five RTP message format
By table five as seen, the head of RTP message comprises 12 bytes altogether, so, according to mode shown in Figure 4, after the speech data that will transmit is encapsulated as the GTP protocol massages, the message length that obtains will be 20 (data length)+12 (RTP head length)+8 (UDP head length)+20 (IPv4 head length)+8 (GTP head length), totally 68 bytes.For this length is the pay(useful) load of 68 bytes, and the length after it is encapsulated as the IPv4 datagram will be 96 bytes, and wherein valid data only account for 70.8%; The length that is encapsulated as behind the ethernet frame is 114 bytes, if further consider transmission time slot shown in the table one and sync bit, is 134 bytes altogether then, and wherein effective load data only accounts for 50%.
As seen, when adopting existing GTP protocol massages transmission data, effective load data shared ratio in IP datagram is lower, has reduced network transmission efficiency, has wasted bandwidth.
Summary of the invention
The embodiment of the invention provides a kind of general packet wireless service tunnel protocol message transmitting method, can improve effective load data shared ratio in IP datagram.
The embodiment of the invention provides a kind of general packet wireless service tunnel protocol message transfer system, can improve effective load data shared ratio in IP datagram.
The embodiment of the invention provides a kind of general packet wireless service tunnel protocol message transmissions equipment, can improve effective load data shared ratio in IP datagram.
The technical scheme of the embodiment of the invention is achieved in that
A kind of general packet wireless service tunnel protocol GTP message transmitting method comprises:
First network element is encapsulated in more than one GTP protocol massages in the same IP datagram by multiplex mode;
The IP datagram of described first network element after with described encapsulation sends to second network element.
A kind of GTP protocol massages transmission system comprises: first network element and second network element;
Described first network element is used for more than one GTP protocol massages is encapsulated in the same IP datagram by multiplex mode, sends to described second network element;
Described second network element is used to receive the IP datagram from described first network element.
A kind of GTP protocol massages transmission equipment comprises: encapsulation unit and transmitting element;
Described encapsulation unit is used for more than one GTP protocol massages is encapsulated in the same IP datagram by multiplex mode;
Described transmitting element is used for the IP datagram after the described encapsulation is sent to receiving equipment.
As seen, adopt the technical scheme of the embodiment of the invention, first network element is encapsulated in more than one GTP protocol massages in the same IP datagram by multiplex mode, sends to second network element.Compared with prior art, the described scheme of the embodiment of the invention sends by a plurality of GTP protocol massages are encapsulated in the same IP datagram, has improved the shared ratio of effective load data in the IP datagram, and then has improved network transmission efficiency, has saved bandwidth.
Description of drawings
Fig. 1 is existing GPRS network configuration diagram.
Fig. 2 is Gn or gp interface protocol stack schematic diagram between the existing GSN.
When Fig. 3 transmitted data for the existing GTP of employing protocol massages, data entered the encapsulation process schematic diagram of protocol stack.
Fig. 4 is an existing voice transmission means schematic diagram.
Fig. 5 is the flow chart of the inventive method embodiment.
Fig. 6 is a kind of IP datagram structural representation that adopts after multiplex mode encapsulates in the embodiment of the invention.
Fig. 7 is the another kind of IP datagram structural representation that adopts after multiplex mode encapsulates in the embodiment of the invention.
Fig. 8 is the flow chart of first preferred embodiment of the inventive method.
Fig. 9 is the flow chart of second preferred embodiment of the inventive method.
Figure 10 is the flow chart of the 3rd preferred embodiment of the inventive method.
Figure 11 is the flow chart of the 4th preferred embodiment of the inventive method.
Figure 12 is the composition structural representation of system embodiment of the present invention.
Figure 13 is the composition structural representation of present device embodiment.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
In the embodiment of the present invention, first network element is encapsulated in more than one GTP protocol massages in the same IP datagram by multiplex mode, sends to second network element; Second network element carries out decapsulation to the IP datagram that receives, and obtains described more than one GTP protocol massages.
Need to prove, the form of presentation of above-mentioned " first network element " and " second network element " is just for ease of describing, in actual applications, " first network element " or " second network element " can be respectively applied for any one network element in the expression communicating pair, that is to say that the above-mentioned function of being finished by " first network element " also can be finished by " second network element ".
Fig. 5 is the flow chart of the inventive method embodiment.First network element in the present embodiment and second network element can be any two node or equipment that communicate by the GTP agreement, as SGSN and GGSN, and S-GW and P-GW etc.As shown in Figure 5, may further comprise the steps:
Step 51: first network element is encapsulated in more than one GTP protocol massages in the same IP datagram by multiplex mode, sends to second network element.
Before this step, communicating pair, promptly first network element and second network element need at first obtain the other side's multiplexed control information.Because the operation that first network element and the second network element both sides are carried out is the same, thus in the embodiment of the invention for ease of description, be that example describes only with the first network element side.
In the present embodiment, the multiplexed control information of second network element that first network element gets access to can comprise: to the tenability of multiplexed transmission, and the GTP protocol type that adopts multiplexed transmission, as GTP-C, GTP-U or GTP ', the UDP destination slogan that receives multiplexed message, maximum time of delay, a kind of or combination in any in the information such as maximum message segment length of suitable multiplexed encapsulation of encapsulating.Different bearer can corresponding different multiplexed control informations in different GTP protocol type or the network.
Wherein, the tenability of multiplexed transmission can be divided into transmitting capacity and receiving ability, and first network element or second network element can only have a kind of ability wherein, also can have this two kinds of abilities simultaneously.
After first network element gets access to the multiplexed control information of second network element,, judge whether second network element supports multiplexed transmission, if support that then execution in step 51 according to the tenability information of the multiplexed transmission of wherein carrying; If do not support, such as, second network element only has multiplexed transmitting capacity and does not have receiving ability, perhaps, neither possesses transmitting capacity and does not also possess receiving ability, and then first network element transmits the GTP protocol massages according to existing normal transmission mode to second network element.Only have multiplexed transmitting capacity and do not have the situation of receiving ability for second network element, second network element can send the GTP protocol massages according to multiplex mode to first network element.Certainly, first network element need possess receiving function.In a word, in embodiments of the present invention, can only on a direction of communicating pair, adopt multiplexed encapsulation and transmission means, and in another transmission direction, still adopt existing encapsulation and transmission means.
Wherein, first network element mode of obtaining the multiplexed control information of second network element can be any one or the combination in any in following three kinds:
1) obtains the part or all of multiplexed control information of second network element by pre-configured mode.
2) when each user's connection or carrying are set up or revised,, carry part or all of multiplexed control information, be notified to the other side by in sending to the other side's GTP-C message; In present embodiment, first network element is known the part or all of multiplexed control information of second network element according to the GTP-C message that is received from second network element.
3) when communicating pair connects for the first time, both sides carry part or all of multiplexed control information in the GTP-C message that sends, be notified to the other side; In present embodiment, first network element is known the part or all of multiplexed control information of second network element, and this information is stored according to the GTP-C message that is received from second network element, is used for the follow-up transmission means of determining between the two.
First network element can be by in above-mentioned three kinds of modes any one, or the multiplexed control information of obtaining second network element by the mode of combination in any.Such as, can obtain partial information by pre-configured mode, and other information needed is by 2) and 3) described mode obtains.Other possible combined situation is enumerated no longer one by one.
Need to prove aforesaid way 2) and 3) in be used to carry multiplexed control information GTP-C message also can replace with other message well known in the art, this is a kind of to be not limited to GTP-C message.
Get access to the multiplexed control information of second network element, and after determining that second network element is supported multiplexed transmission, first network element sends to same IP destination address with needs, and promptly the GTP protocol massages of second network element is encapsulated in the same IP datagram, sends to second network element.
If comprise the maximum time of delay that encapsulates in the multiplexed control information that first network element gets access to, so, first network element is with more than one GTP protocol massages, be encapsulated in the same IP datagram this process need by multiplex mode and in described maximum encapsulation time of delay, finish, with restriction because the delay that multiplexed transmission causes; If when comprising the maximum message segment length that is suitable for multiplexed encapsulation in the multiplexed control information that first network element gets access to, so, first network element need be less than or equal to the described maximum message segment length that is suitable for multiplexed encapsulation by the length that multiplex mode is encapsulated in each the GTP protocol massages in the same IP datagram.And, if the service quality (QoS that different GTP protocol massages is corresponding different, Quality of Service) requirement, such as, what the user in the current network had is surfing the Net, what have is carrying out Video chat, these two kinds different activities may corresponding different qos requirements so, for this situation, the GTP protocol massages that only will have identical qos requirement in the embodiment of the invention is encapsulated in the same IP datagram by multiplex mode, and the GTP protocol massages in the promptly same IP datagram need have identical QoS.
The mode of carrying out multiplexed encapsulation in the embodiment of the invention can adopt following two kinds:
1) only encapsulate same type GTP protocol massages in the same IP datagram, as, GTP-C, GTP-U or GTP ':
First network element sends to different UDP destination interfaces with dissimilar GTP protocol massages.Wherein, can further comprise a multiplexed head before each GTP protocol massages.
Fig. 6 is a kind of IP datagram structural representation that adopts after multiplex mode encapsulates in the embodiment of the invention.As shown in Figure 6, wherein, the form of IP head is same as the prior art, repeats no more; The length and verification and the information that comprise transmission employed UDP source port number of this multiplexed message and destination slogan, this UDP message in the UDP head; UDP source port number wherein can be the newly assigned port numbers of first network element, also can be to adopt common mode to send the UDP source port number of packaged arbitrary GTP protocol massages; UDP destination slogan is the UDP destination slogan that carries by in pre-configured or the multiplexed control information of consulting to obtain; Multiplexed head can comprise: it is corresponding with self to adopt common mode to send, one or both in the length information of UDP source port number that should use when promptly being close to this GTP protocol massages of multiplexed and next-door neighbour's GTP protocol massages.If above-mentioned two kinds of information do not comprise that then multiplexed head can omit.
2) the dissimilar GTP protocol massages of encapsulation in the same IP datagram:
First network element sends to same UDP destination interface with dissimilar GTP protocol massages.Wherein, can further comprise a multiplexed head before each GTP protocol massages.
Fig. 7 is the another kind of IP datagram structural representation that adopts after multiplex mode encapsulates in the embodiment of the invention.As shown in Figure 7, wherein, the form of IP head is same as the prior art, repeats no more; The length and verification and the information that comprise transmission employed UDP source port number of this multiplexed message and destination slogan, this UDP message in the UDP head; UDP destination slogan wherein is the UDP destination slogan that carries by in pre-configured or the multiplexed control information of consulting to obtain, the UDP source port number can be the newly assigned port numbers of first network element, also can be to adopt common mode to send the UDP source port number of packaged arbitrary GTP protocol massages.Comprise in the multiplexed head: the UDP destination slogan that should use when adopting common mode to send the GTP protocol massages corresponding with self, such as, when its corresponding GTP protocol type is GTP-C, corresponding UDP destination slogan is 2123, when its corresponding GTP protocol type is GTP-U, corresponding UDP destination slogan is 2152, when its corresponding GTP protocol type is GTP ', corresponding UDP destination slogan is 3386, thereby makes second network element can know the particular type of different GTP protocol massages when decapsulation; Perhaps, also can directly in multiplexed head, carry the protocol type sign of the GTP protocol massages corresponding with self, such as, representing the protocol type of this GTP protocol massages with 00 is GTP-C, representing the protocol type of this GTP protocol massages with 01 is GTP-U etc.In addition, also can further comprise in the multiplexed head: one or both in the UDP source port number that should use when adopting common mode to send the GTP protocol massages corresponding and the length information of this GTP protocol massages with self.
Step 52: second network element carries out decapsulation to the IP datagram that receives, and obtains more than one GTP protocol massages.
Second network element carries out the decapsulation of ip protocol layer to the IP datagram that receives, in the IP datagram of encapsulation, receive the udp protocol message after carrying out the ip protocol layer decapsulation in the UDP destination interface of appointment, and this message is carried out follow-up decapsulation by existing mode, therefrom extract a plurality of GTP protocol massages that comprised, finish multiplexed transmission.
As seen, adopt the such scheme of the embodiment of the invention, transmit, make that the effective load data in the IP datagram increases, improved network transmission efficiency, saved bandwidth by a plurality of GTP protocol massages are encapsulated in the same IP datagram.Below by preferred embodiment scheme of the present invention is described in further detail.
Preferred embodiment one:
Fig. 8 is the flow chart of first preferred embodiment of the inventive method.In the present embodiment, the GTP protocol massages that adopts multiplex mode to transmit between first network element and second network element is the GTP-U protocol massages, and the network layer host-host protocol is IPv4; First network element with the mode that second network element obtains the other side's multiplexed control information is: when being connected or carry foundation or modification, and the tenability information of consulting multiplexed transmission by GTP-C message; Determine all the other information by pre-configured mode, as receive UDP destination slogan of multiplexed message etc.Suppose that the UDP destination slogan in the present embodiment is A, and first network element and second network element are respectively S-GW and P-GW.As shown in Figure 8, may further comprise the steps:
When the user connects or carries 1 when setting up, suppose that S-GW supports the GTP-U protocol multiplex transmission means in this connection or the carrying, and the multiplexed transmission means of GTP-U that P-GW does not support this connection or carries:
Step 81: connect or carry 1 when setting up, S-GW sends GTP-C message to P-GW, carries the tenability information of S-GW to multiplexed transmission in this message, supports the multiplexed transmission of GTP-U agreement with notice P-GW local terminal.
Step 82:P-GW sends GTP-C message to S-GW, does not comprise the tenability information of P-GW to multiplexed transmission in this message, does not support the multiplexed transmission of GTP-U agreement with notice S-GW local terminal; Perhaps, P-GW all can discern to S-GW transmission both sides, value is the ability information of particular value, such as 0000, does not support the multiplexed transmission of GTP-U agreement with notice S-GW local terminal.
Step 83: because P-GW does not support the multiplexed transmission of GTP-U agreement, so S-GW and P-GW are for being connected or carrying GTP-U protocol massages in 1, can only still adopt existing common packaged type to encapsulate and transmit, wherein the destination slogan of UDP is 2152.
When the user connects or carries 2 when setting up, suppose that S-GW and P-GW all support this to be connected or the multiplexed transmission means of the GTP-U agreement of carrying:
Step 84: connect or carry 2 when setting up, S-GW sends GTP-C message to P-GW, carries the tenability information of S-GW to multiplexed transmission in this message, supports the multiplexed transmission of GTP-U agreement with notice P-GW local terminal.
Step 85:P-GW sends GTP-C message to S-GW, carries the tenability information of P-GW to multiplexed transmission in this message, supports the multiplexed transmission of GTP-U agreement with notice S-GW local terminal.
Step 86:S-GW sends to P-GW IP address with follow-up needs, and the GTP-U protocol massages with identical qos requirement carries out multiplexed encapsulation.
Wherein the destination slogan in the UDP head is A; The UDP source port number that the UDP source port number that carries in each multiplexed head should use when sending the GTP-U protocol massages corresponding with it for the employing common mode.
The IP datagram that step 87:S-GW will encapsulate a plurality of GTP-U protocol massages is sent to P-GW; P-GW carries out decapsulation to the IP datagram that receives, and therefrom extracts a plurality of GTP-U protocol massages that comprise.
In the present embodiment, S-GW is same as the prior art with the mode that IP datagram is sent to P-GW, and its concrete transmission course repeats no more.
Step 88:P-GW sends to the S-GWIP address with follow-up needs, and the GTP-U message with identical qos requirement carries out multiplexed encapsulation.
Wherein the destination slogan in the UDP head is A; The UDP source port number that the UDP source port number that carries in each multiplexed head should use when sending the GTP-U protocol massages corresponding with it for the employing common mode.
The IP datagram that step 89:P-GW will encapsulate a plurality of GTP-U protocol massages sends to S-GW; S-GW carries out decapsulation to the IP datagram that receives, and therefrom extracts a plurality of GTP-U protocol massages that comprise.
When the user connects or carries 3 when setting up, suppose that S-GW supports this connection or the multiplexed transmission means of the GTP-U agreement of carrying, and P-GW only supports the transmission of GTP-U protocol multiplex encapsulated message, but does not support reception this kind message:
Step 810: connect or carry 3 when setting up, S-GW sends GTP-C message to P-GW, carries the tenability information of S-GW to multiplexed transmission in this message, supports the multiplexed transmission of GTP-U agreement with notice P-GW local terminal.
Step 811:P-GW sends GTP-C message to S-GW, carries the tenability information of P-GW to multiplexed transmission in this message, only supports the transmission of GTP-U protocol multiplex encapsulated message to notify the S-GW local terminal, does not support the reception to this kind message.
Step 812:S-GW no longer carries out multiplexed encapsulation according to the receiving ability of P-GW for follow-up GTP-U message, but adopts common packaged type to send to 2152 ports of P-GW.
Step 813～814: because P-GW supports the multiplexed transmission at the GTP-U agreement, therefore, P-GW still can send the IP datagram that has encapsulated a plurality of GTP-U protocol massages according to the described process in step 88～89 to S-GW.
Preferred embodiment two:
Fig. 9 is the flow chart of second preferred embodiment of the inventive method.In the present embodiment, the GTP protocol massages that adopts multiplex mode to transmit between first network element and second network element is GTP-U and GTP-C protocol massages, the network layer host-host protocol is IPv4, and dissimilar GTP protocol massages is encapsulated in the different IP datagram and transmits; The mode that first network element and second network element obtain the other side's multiplexed control information is: when both sides connect for the first time, and the UDP destination slogan information of consulting the tenability of multiplexed transmission and receiving multiplexed message; All the other information are obtained by pre-configured mode as information such as maximum encapsulation time of delays.Suppose the maximum prewired 20ms of being changed to encapsulation time of delay of GTP-C protocol massages in the present embodiment; The maximum prewired 30ms that is changed to encapsulation time of delay of GTP-U protocol massages.As shown in Figure 9, may further comprise the steps:
Step 91: when connecting with second network element first, first network element sends negotiation message to second network element, carry the tenability information of the multiplexed transmission of first network element in this message, to notify the multiplexed transmission of second network element local terminal support to GTP-C agreement and GTP-U agreement, and the UDP destination slogan that local terminal receives the multiplexed encapsulated message of GTP-U agreement is A1, and the UDP destination slogan that receives the multiplexed encapsulated message of GTP-C agreement is A2.
Step 92: second network element receives above-mentioned information, and stores.
Step 93: second network element sends negotiation message to first network element, carry the tenability information of the multiplexed transmission of second network element in this message, to notify the multiplexed transmission of first network element local terminal support to GTP-C agreement and GTP-U agreement, and the UDP destination slogan that local terminal receives the multiplexed encapsulated message of GTP-U agreement is B1, and the UDP destination slogan that receives the multiplexed encapsulated message of GTP-C agreement is B2.
Step 94: first network element receives above-mentioned information, and stores.
Through after the above-mentioned negotiations process, for the connection of bipartite current connection and follow-up foundation, each side all can use the tenability information about the other side's multiplexed transmission of being stored, and determines whether and how to carry out multiplexed transmission.
Step 95: first network element carries out multiplexed encapsulation with the follow-up GTP-C message that sends to the IP address of second network element.
In this step, the encapsulation duration that first network element carries out multiplexed encapsulation is no more than 20ms; UDP destination slogan in the IP datagram after the encapsulation is B2; Comprise the UDP source port number in the multiplexed head of each GTP protocol massages correspondence in the IP datagram after the encapsulation, value is the source port number that should use when adopting common mode to send this GTP-C protocol massages, also can further comprise the length of the GTP protocol massages corresponding with self.
Step 96: the IPv4 datagram that first network element will encapsulate a plurality of GTP-C protocol massages sends to second network element; Second network element carries out decapsulation to the IPv4 datagram that receives, and therefrom extracts a plurality of GTP-C protocol massages that comprise.
Step 97: second network element carries out multiplexed encapsulation with the follow-up GTP-C protocol massages that sends to first network element IP address.
In this step, the encapsulation duration that second network element carries out multiplexed encapsulation is no more than 20ms; UDP destination slogan in the IP datagram after the encapsulation is A2; Comprise the UDP source port number in the multiplexed head of each GTP protocol massages correspondence in the IP datagram after the encapsulation, value is the source port number that should use when adopting common mode to send this GTP-C protocol massages, also can further comprise the length information of the GTP protocol massages corresponding with self.
Step 98: the IPv4 datagram that second network element will encapsulate a plurality of GTP-C information sends to first network element; First network element carries out decapsulation to the IPv4 data literary composition that receives, and therefrom extracts a plurality of GTP-C protocol massages that comprise.
Step 99: first network element carries out multiplexed encapsulation with the follow-up GTP-U message that sends to second network element IP address.
In this step, the encapsulation duration that first network element carries out multiplexed encapsulation is no more than 30ms; UDP destination slogan in the IP datagram after the encapsulation is B1; Comprise the UDP source port number in the multiplexed head of each GTP protocol massages correspondence in the IP datagram after the encapsulation, value sends the source port number that this GTP-U message should use for adopting common mode.
Step 910: the IPv4 datagram that first network element will encapsulate a plurality of GTP-U information sends to second network element; Second network element carries out decapsulation to the IPv4 datagram that receives, and therefrom extracts a plurality of GTP-U protocol massages that comprise.
Step 911: second network element carries out multiplexed encapsulation with the follow-up GTP-U message that sends to first network element IP address.
In this step, the encapsulation duration that second network element carries out multiplexed encapsulation is no more than 30ms; UDP destination slogan in the IP datagram after the encapsulation is A1; Comprise the UDP source port number in the multiplexed head of each GTP protocol massages correspondence in the IP datagram after the encapsulation, value sends the source port number that this GTP-U message should use for adopting common mode.
Step 912: the IPv4 datagram that second network element will encapsulate a plurality of GTP-U information sends to first network element; First network element carries out decapsulation to the IPv4 datagram that receives, and therefrom extracts a plurality of GTP-U protocol massages that comprise.
Preferred embodiment three:
Figure 10 is the flow chart of the 3rd preferred embodiment of the inventive method.In the present embodiment, the GTP protocol massages that adopts multiplex mode to transmit between first network element and second network element is GTP-U, GTP-C and GTP ' protocol massages, the network layer host-host protocol is IPv6, and dissimilar GTP protocol massages is encapsulated in the same IP datagram and transmits; First network element with the mode that second network element obtains the other side's multiplexed control information is: when the user is connected or carry foundation or modification, consult the tenability of multiplexed transmission, the UDP destination slogan of the multiplexed message of reception and the maximum message segment length information that is suitable for multiplexed encapsulation.As shown in figure 10, may further comprise the steps:
Step 101: when connection or carrying are set up or revised, first network element sends negotiation information to second network element, wherein carry the tenability information of first network element to multiplexed transmission, to notify the multiplexed transmission of second network element local terminal support to the GTP protocol massages, and the UDP destination slogan that local terminal receives the GTP protocol massages after the multiplexed encapsulation is D1, and the maximum message segment length that is suitable for multiplexed encapsulation is 100 bytes.
Step 102: second network element sends negotiation message to first network element, wherein carry the tenability information of second network element to multiplexed transmission, to notify the multiplexed transmission of first network element local terminal support to the GTP protocol massages, and the UDP destination slogan that local terminal receives the GTP protocol massages after the multiplexed encapsulation is D2, and the maximum message segment length that is suitable for multiplexed encapsulation is 120 bytes.
Step 103: first network element carries out multiplexed encapsulation with the GTP protocol massages that follow-up destination address is second network element, qos requirement is identical and message length is no more than 120 bytes.
UDP destination slogan in the IP datagram after the encapsulation is D2; The source port number that the UDP source port number that carries in the multiplexed head of each of each GTP protocol massages correspondence in the IP datagram after the encapsulation should use when sending this GTP protocol massages for the employing common mode; The type identification that also specifically comprises the GTP protocol massages that it is corresponding in each multiplexed head, such as, corresponding GTP protocol massages is the GTP-C protocol massages, then is taken as 1, is the GTP-U protocol massages, then is taken as 2, is GTP ' protocol massages, then is taken as 3.
Step 104: the IPv6 datagram that first network element will encapsulate a plurality of GTP protocol massages sends to the D2 port of second network element.
Step 105: second network element carries out decapsulation to the IPv6 datagram that receives, and therefrom extracts a plurality of GTP protocol massages that comprise.
According to the type identification of the GTP protocol massages in the multiplexed head, second network element can be determined the concrete protocol type of corresponding GTP message.
Step 106～108: similar with step 103～105, second network element also can send to first network element by the formed IPv6 message of multiplexed encapsulation with a plurality of GTP protocol massages; First network element is receiving and through after the decapsulation process, is therefrom extracting a plurality of GTP protocol massages that comprised.
Step 109:,, can adopt common packaged type to transmit such as the GTP protocol massages of message length above the maximum message segment length that is suitable for multiplexed encapsulation for the GTP protocol massages that does not satisfy multiplexed transmission conditions.
Suppose for a certain reason, such as network element load too high in running, institute thinks and alleviates load, no longer continue to support multiplexed transmission means, perhaps, cause second network element that the tenability of multiplexed transmission is changed because be configured to not support reason such as multiplexed transmission means, become the transmission of only supporting GTP protocol multiplex encapsulated message, no longer support reception to this kind message, so, in the subsequent step:
Step 1010: second network element sends negotiation message to first network element, comprises in this message that second network element after the renewal to the tenability information of multiplexed transmission, informs first network element, and local terminal no longer supports to receive the multiplexed encapsulated message of GTP agreement.
Step 1011～1012: because second network element is still supported the multiplexed transmission of GTP agreement, therefore, second network element still can send the multiplexed encapsulated message of GTP agreement according to the described process in step 103～105 to first network element.
Step 1013: first network element no longer carries out multiplexed encapsulation according to the change of the second network element receiving ability for follow-up GTP message, but adopts common packaged type to be transferred to second network element.
Preferred embodiment four:
Figure 11 is the flow chart of the 4th preferred embodiment of the inventive method.In the present embodiment, the GTP protocol massages that adopts multiplex mode to transmit between first network element and second network element is GTP-U, GTP-C and GTP ' protocol massages, the network layer host-host protocol is IPv4, and dissimilar GTP protocol massages is encapsulated in the same IP datagram and transmits; The mode that first network element and second network element obtain the other side's multiplexed control information is: obtain the tenability of multiplexed transmission, the UDP destination slogan that receives multiplexed message, maximum encapsulation delay time information by pre-configured mode.Suppose that the maximum encapsulation in the present embodiment is 20ms time of delay, the UDP destination slogan that receives multiplexed message is C.As shown in figure 11, may further comprise the steps:
Step 111: according to pre-configured information, first network element is second network element with destination address, and the identical GTP protocol massages of qos requirement carries out multiplexed encapsulation.
That is mentioned in this step pre-configuredly is meant all multiplexed control informations of pre-configured both sides in first network element and second network element.
In this step, the duration that first network element carries out multiplexed encapsulation is no more than maximum encapsulation 20ms time of delay; The UDP destination slogan that carries in the IP datagram after the encapsulation is C; The source port number that source udp port in the multiplexed head of each GTP protocol massages correspondence in the IP datagram after the encapsulation number should use when adopting common mode to send this GTP protocol massages; The destination slogan that UDP destination slogan in each multiplexed head should use when sending each self-corresponding GTP protocol massages according to common mode.Such as, the corresponding GTP protocol massages of a certain multiplexed head is the GTP-C protocol massages, so, its destination slogan is 2123; If corresponding GTP protocol massages is the GTP-U protocol massages, so, its destination slogan is 2152; If corresponding GTP protocol massages is GTP ', so, its destination slogan is 3386.
Step 112: the IP datagram that first network element will encapsulate a plurality of GTP protocol massages sends to the C port of second network element.
Step 113: second network element carries out decapsulation to the IP datagram that receives, and therefrom extracts a plurality of GTP protocol massages that comprise.
According to the value of the UDP destination slogan that carries in the multiplexed head, second network element can be determined the particular type of corresponding GTP protocol massages.
Step 114～116: similar with step 111～113, second network element is encapsulated in a plurality of GTP protocol massages and is sent to first network element in the same IP datagram by multiplex mode; First network element carries out decapsulation to the IP datagram that receives, and therefrom extracts a plurality of GTP protocol massages that comprised.
Based on said method, Figure 12 is the composition structural representation of system embodiment of the present invention.Above-mentioned each method embodiment can realize based on system shown in Figure 12.As shown in figure 12, this system comprises: first network element 121 and second network element 122;
First network element 121 is used for more than one GTP protocol massages is encapsulated in the same IP datagram by multiplex mode, sends to second network element 122;
Second network element 122 is used to receive the IP datagram from first network element 121.
Wherein, first network element 121 is further used for, and obtains the multiplexed control information of second network element 122; First network element 121 determines according to the multiplexed control information of second network element 122 that gets access to whether second network element 122 supports multiplexed transmission, if support, then with more than one GTP protocol massages, be encapsulated in the same IP datagram by multiplex mode, send to second network element 122; If do not support, then transmit the GTP protocol massages to second network element 122 according to the normal transmission mode.
Figure 13 is the composition structural representation of present device embodiment.As shown in figure 13, this equipment comprises: encapsulation unit 131 and transmitting element 132;
Encapsulation unit 131 is used for more than one GTP protocol massages is encapsulated in the same IP datagram by multiplex mode; Transmitting element 132 is used for the IP datagram after the encapsulation is sent to receiving equipment.
In addition, further comprise in this equipment: acquiring unit 133, the multiplexed control information that is used to obtain receiving equipment; Determine according to the multiplexed control information of the receiving equipment that gets access to whether this receiving equipment supports multiplexed transmission,, then notify encapsulation unit 131 to carry out multiplexed encapsulation function if support; If do not support, then notify encapsulation unit 131 to transmit the GTP protocol massages to receiving equipment according to the normal transmission mode.Wherein, multiplexed control information can specifically comprise: to the tenability of multiplexed transmission; Or comprise that further the GTP protocol type that adopts multiplexed transmission, the UDP destination slogan that receives multiplexed message, maximum encapsulate time of delay, a kind of or combination in any in the maximum message segment length information of suitable multiplexed encapsulation.
Above-mentioned acquiring unit 133 can specifically comprise: obtain subelement 1331 and definite subelement 1332;
Obtain subelement 1331, negotiation mode when being used for connection by pre-configured mode, each user or carrying and setting up or revise, and first a kind of or combination in any in the negotiation mode when connecting first between network element 121 and second network element 122, the multiplexed control information of obtaining receiving equipment;
Determine subelement 1332, be used for determining according to the multiplexed control information of receiving equipment whether this receiving equipment supports multiplexed transmission,, then notify encapsulation unit 131 to carry out multiplexed encapsulation function if support; If do not support, then notify encapsulation unit 131 to transmit the GTP protocol massages to receiving equipment according to the normal transmission mode.
Can specifically comprise in the above-mentioned encapsulation unit 131: the first encapsulation subelement 1311 and the second encapsulation subelement 1312; Wherein:
The first encapsulation subelement 1311 is used for the GTP protocol massages of same type is encapsulated in same IP datagram;
The second encapsulation subelement 1312 is used for dissimilar GTP protocol massages is being encapsulated in same IP datagram.
The above-mentioned first encapsulation subelement 1311 can be further used for, when the GTP protocol massages with same type is encapsulated in the same IP datagram, add a multiplexed head respectively before each GTP protocol massages in being encapsulated in same IP datagram, this multiplexed head comprises: the UDP source port number that should use when adopting common mode to send the GTP protocol massages of self correspondence, and in the length information of the GTP protocol massages corresponding with self one or both;
The second encapsulation subelement 1312 can be further used for, when being encapsulated in dissimilar GTP protocol massages in the same IP datagram, add a multiplexed head respectively before each GTP protocol massages in being encapsulated in same IP datagram, this multiplexed head comprises: the UDP destination slogan that should use when adopting common mode to send the GTP protocol massages corresponding with self, perhaps, the protocol type of the GTP protocol massages corresponding sign with self.
The concrete workflow of Figure 12 and 13 described systems and apparatus embodiments please refer to the explanation of method appropriate section, repeats no more herein.
As seen, adopt the technical scheme of the embodiment of the invention, by being encapsulated in the same IP datagram, a plurality of GTP protocol massages transmit, made full use of the maximum load length of IP datagram, improve the shared ratio of effective load data in the IP datagram effectively, thereby improved network transmission efficiency and bandwidth usage efficient.
Below by a concrete example, adopt the described scheme of the embodiment of the invention to compare the different-effect in improving IP datagram aspect the effective load data proportion more once with adopting existing transmission means.
For the voice communication of adopting the GSM-AMR coded format, suppose that its average transmission code check is 8Kbps, the sampling interval is 20ms, then the length of each speech frame is 20 bytes.Suppose that speech frame in this example encapsulates according to mode shown in Figure 4 and transmits, being about to the IPv4 tunnel that the packaged Real-time Transport Protocol message of speech data is carried on tunnel, GTP upper strata transmits, then will be somebody's turn to do after the IPv4 datagram of transmitting in the tunnel, upper strata is encapsulated as the GTP-U protocol massages, length is 68 bytes altogether.
For this length is the effective load data of 68 bytes:
If the existing normal transmission mode of sampling is transmitted, the length that is encapsulated as after the IPv4 datagram is 96 bytes, and the length that is encapsulated as behind the ethernet frame is 114 bytes, if further consider the transmission time slot and the sync bit of ethernet frame, then is 134 bytes altogether.
If adopt the described multiplex mode transmission of the embodiment of the invention, with the GTP protocol massages that can only encapsulate same type in the same IP datagram is example, suppose that each the GTP protocol massages after the encapsulation need add the multiplexed head that a length is 2 bytes, so, according to the record of table one as can be known, in maximum encapsulated time of delay, IPv4 datagram maximum can encapsulate the information that is no more than 1500 bytes, i.e. the UDP head of 28 bytes and IP head and about 20 GTP protocol massages.
For these 20 GTP protocol massages, if when adopting the multiplex mode encapsulation, its final IPv4 datagram length is 1428 bytes, and the length that is encapsulated as behind the ethernet frame is 1466 bytes (having considered transmission time slot and the sync bit in the ethernet frame); If adopt existing packaged type, the total length of the IPv4 datagram of 20 GTP protocol massages correspondences will be 1920 bytes, and the transmission length of total ethernet frame is 2680 bytes.As seen, for 20 same GTP protocol massages, when adopting the different transmission means of these two kinds of described scheme of the embodiment of the invention and prior aries, the length of required IPv4 datagram is respectively 1428 bytes and 1920 bytes; The length of required ethernet frame is respectively 1466 bytes and 2680 bytes.That is to say that the embodiment of the invention described scheme has improved effective load data shared ratio in IP datagram and ethernet frame significantly.
In sum, more than be preferred embodiment of the present invention only, be not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (26)

1, a kind of general packet wireless service tunnel protocol GTP message transmitting method is characterized in that this method comprises:
First network element is encapsulated in more than one GTP protocol massages in the same IP datagram by multiplex mode;
The IP datagram of described first network element after with described encapsulation sends to second network element.
2, method according to claim 1 is characterized in that, described first network element is more than one GTP protocol massages, be encapsulated in the same IP datagram by multiplex mode before, further comprise:
Described first network element obtains the multiplexed control information of described second network element; Described first network element determines according to the multiplexed control information of second network element that gets access to whether described second network element supports multiplexed transmission, if support, then, be encapsulated in the same IP datagram, send to described second network element by multiplex mode with more than one GTP protocol massages.
3, method according to claim 2 is characterized in that, described multiplexed control information comprises: to the tenability of multiplexed transmission.
4, method according to claim 3 is characterized in that, further comprises in the described multiplexed control information:
Adopt the GTP protocol type of multiplexed transmission, the User Datagram Protoco (UDP) UDP destination slogan that receives multiplexed message, maximum time of delay and a kind of or combination in any in the maximum message segment length information of suitable multiplexed encapsulation of encapsulating.
5, method according to claim 3 is characterized in that, described tenability to multiplexed transmission comprises one or both in transmitting capacity and the receiving ability.
6, method according to claim 4 is characterized in that, described GTP protocol type comprises: chain of command GTP agreement GTP-C, user's face GTP agreement GTP-U and GTP '.
7, method according to claim 4 is characterized in that,
When comprising in the described multiplexed control information that maximum encapsulation is during time of delay, described first network element is finished by the process need that multiplex mode is encapsulated in the same IP datagram more than one GTP protocol massages described maximum the encapsulation in time of delay;
When comprising the maximum message segment length that is suitable for multiplexed encapsulation in the described multiplexed control information, the described length that is encapsulated in each the GTP protocol massages in the same IP datagram by multiplex mode need be less than or equal to the described maximum message segment length that is suitable for multiplexed encapsulation.
8, according to claim 3 or 4 described methods, it is characterized in that the corresponding different multiplexed control information of different bearer in different GTP protocol type or the network.
According to claim 3 or 4 described methods, it is characterized in that 9, the multiplexed control information that described first network element obtains described second network element comprises a kind of or combination in any in the following mode:
Obtain by pre-configured mode;
When each user's connection or carrying were set up or revised, mode was obtained through consultation;
When connecting first between described first network element and second network element, mode is obtained through consultation.
10, method according to claim 9 is characterized in that, described mode is through consultation obtained and comprised: described second network element carries the multiplexed control information of self in the GTP-C message that sends, send to described first network element.
11, method according to claim 1 is characterized in that, described with more than one GTP protocol massages, the method that is encapsulated in the same IP datagram by multiplex mode comprises:
If the service quality QoS requirements that different GTP protocol massages is corresponding different, an above GTP protocol massages that then only will have identical qos requirement is encapsulated in the same IP datagram by multiplex mode.
12, method according to claim 1, it is characterized in that, described multiplex mode comprises: the GTP protocol massages of same type is encapsulated in mode in the same IP datagram, and dissimilar GTP protocol massages is encapsulated in the mode in the same IP datagram one or both.
13, method according to claim 12, it is characterized in that, be encapsulated in mode in the same IP datagram for GTP protocol massages, before described each GTP protocol massages that is encapsulated in the same IP datagram a multiplexed head be set respectively same type;
Described multiplexed head comprises: the UDP source port number that should use when adopting common mode to send the GTP protocol massages corresponding with self, and in the length information of the GTP protocol massages corresponding with self one or both.
14, according to claim 12 or 13 described methods, it is characterized in that, for the mode that dissimilar GTP protocol massages is encapsulated in the same IP datagram, before described each GTP protocol massages that is encapsulated in the same IP datagram a multiplexed head is set respectively;
Described multiplexed head comprises: the UDP destination slogan that should use when adopting common mode to send the GTP protocol massages corresponding with self, perhaps, the protocol type of the GTP protocol massages corresponding sign with self.
15, method according to claim 14 is characterized in that, for the mode that dissimilar GTP protocol massages is encapsulated in the same IP datagram, further comprises in the described multiplexed head:
The UDP source port number that should use when adopting common mode to send the GTP protocol massages corresponding, and in the length information of the GTP protocol massages corresponding one or both with self with self.
According to the described method of claim 1, it is characterized in that 16, described IP datagram is the 4th edition IPv4 datagram of IP or the 6th edition IPv6 datagram of IP.
17, method according to claim 1 is characterized in that, described sending to after second network element further comprises:
Described second network element carries out decapsulation to the IP datagram that receives, and obtains described more than one GTP protocol massages.
18, a kind of GTP protocol massages transmission system is characterized in that this system comprises: first network element and second network element;
Described first network element is used for more than one GTP protocol massages is encapsulated in the same IP datagram by multiplex mode, sends to described second network element;
Described second network element is used to receive the IP datagram from described first network element.
19, system according to claim 18 is characterized in that, described first network element is further used for, and obtains the multiplexed control information of described second network element;
Described first network element determines according to the multiplexed control information of second network element that gets access to whether described second network element supports multiplexed transmission, if support, then, be encapsulated in the same IP datagram, send to described second network element by multiplex mode with more than one GTP protocol massages.
20, a kind of GTP protocol massages transmission equipment is characterized in that this equipment comprises: encapsulation unit and transmitting element;
Described encapsulation unit is used for more than one GTP protocol massages is encapsulated in the same IP datagram by multiplex mode;
Described transmitting element is used for the IP datagram after the described encapsulation is sent to receiving equipment.
21, equipment according to claim 20 is characterized in that, further comprises in this equipment:
Acquiring unit, the multiplexed control information that is used to obtain receiving equipment; Determine according to the multiplexed control information of the receiving equipment that gets access to whether described receiving equipment supports multiplexed transmission,, then notify described encapsulation unit to carry out multiplexed encapsulation function if support.
22, equipment according to claim 21 is characterized in that, described multiplexed control information comprises: to the tenability of multiplexed transmission.
23, equipment according to claim 22 is characterized in that, further comprises in the described multiplexed control information:
Adopt the GTP protocol type of multiplexed transmission, the UDP destination slogan that receives multiplexed message, maximum time of delay and a kind of or combination in any in the maximum message segment length information of suitable multiplexed encapsulation of encapsulating.
24, according to claim 22 or 23 described equipment, it is characterized in that described acquiring unit specifically comprises: obtain subelement and definite subelement;
The described subelement that obtains, negotiation mode when being used for connection by pre-configured mode, each user or carrying and setting up or revise, and a kind of or combination in any in the negotiation mode when connecting first between described first network element and second network element, the multiplexed control information of obtaining described receiving equipment;
Described definite subelement is used for determining according to the multiplexed control information of described receiving equipment whether described receiving equipment supports multiplexed transmission, if support, then notifies described encapsulation unit to carry out multiplexed encapsulation function.
25, according to claim 20 or 21 described equipment, it is characterized in that described encapsulation unit specifically comprises: the first encapsulation subelement and the second encapsulation subelement;
The described first encapsulation subelement is used for the GTP protocol massages of same type is encapsulated in same IP datagram;
The described second encapsulation subelement is used for dissimilar GTP protocol massages is encapsulated in same IP datagram.
26, equipment according to claim 25 is characterized in that,
The described first encapsulation subelement is further used for, and when the GTP protocol massages with same type is encapsulated in the same IP datagram, adds a multiplexed head respectively before each the GTP protocol massages in being encapsulated in same IP datagram; Described multiplexed head comprises: the UDP source port number that should use when adopting common mode to send the GTP protocol massages corresponding with self, and in the length information of the GTP protocol massages corresponding with self one or both;
The described second encapsulation subelement is further used for, and when being encapsulated in dissimilar GTP protocol massages in the same IP datagram, adds a multiplexed head respectively before each the GTP protocol massages in being encapsulated in same IP datagram; Described multiplexed head comprises: the UDP destination slogan that should use when adopting common mode to send the GTP protocol massages corresponding with self, perhaps, the protocol type of the GTP protocol massages corresponding sign with self.
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