CN101388825A - Method and apparatus for transmitting data package of GPRS tunnel protocol - Google Patents
Method and apparatus for transmitting data package of GPRS tunnel protocol Download PDFInfo
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Abstract
The invention discloses a method for transmitting GTP data packets of a GPRS tunneling protocol, which comprises the following steps: multiplexing a plurality of the G-PDU packets together on a sending endpoint of a GTP tunnel, and sending the G-PDU packets to a receiving endpoint of the GTP tunnel after packing the together multiplexed G-PDU packets through the transmission path protocol. With the technical proposal of the invention, the transmission efficiency can be improved, and the transmission bandwidth can be saved, simultaneously, the number of the transferred data packets in the transmission network further can be reduced, and the load of the transmission network can be reduced, and simultaneously, the invention further discloses a GTP tunnel endpoint device.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly a kind of transmission GPRS (General Packet Radio Service, the GPRS) method and apparatus of tunnel protocol packet.
Background technology
By Gateway GPRS Support Node (Gateway GPRS Support Node, GGSN) and Serving GPRS Support Node (Serving GPRS Support Node, SGSN) universal mobile telecommunications system of Zu Chenging (Universal Mobile Telecommunication System, UMTS)/the GPRS backbone network, (GPRS Tunnelling Protocol GTP) transmits the user grouping data to adopt GPRS Tunnel Protocol; Transmit the tunnel management information that relevant tunnel is set up, safeguarded, discharges; Transmit relevant request, response response, the unsupported path management information of version responded.GGSN and SGSN can be referred to as GPRS Support Node (GPRS Support Node, GSN).Utilize GTP tunnel can encapsulate several data, so just can realize GPRS backbone network and multiple external data net interconnecting.GTP tunnel allows transmission various protocols bag, wraps or X.25 wraps as IP.
Fig. 1 is that the professional and VoIP speech business of general data is gone up when transmitting at Ethernet (Ethernet) by GTP-U encapsulation back in the prior art, the schematic diagram that terminal use's data are encapsulated.
As shown in Figure 1, GTP-U can be used for encapsulating terminal use's data that GTP tunnel uses different agreement.Each user data transmits in the packet switching network by the transmission path agreement after adopting the encapsulation of GTP-U head.
Suppose terminal use's The data UDP/IP encapsulation, (VirtualLocal Area network VLAN), and does not have IP fragmentation to the network support VLAN; Then transport overhead comprises GTP-U head, UDP head, IP head and Ethernet transport overhead, totally 58 bytes.
For the general data business, its average message length is 268 bytes, add user's tunneling expense (IPv4, UDP) after, terminal use's data packet length is 296 bytes; This moment, efficiency of transmission equaled 296/ (296+58)=83.62%.
The present inventor finds, to VoIP business based on G.729A commonly used, service rate is 8kbps, and 10ms divides into groups the time, and message length is 10 bytes.As shown in Figure 2, after the employing RTP/UDP/IP encapsulation, terminal use's data packet length is 50 bytes, and this moment, efficiency of transmission equaled 50/ (50+58)=46.30%.That is to say that for the less packet of terminal use's data packet length, efficiency of transmission can reduce greatly.(in terminal use's data of GTP-U transmission, small data packets will get more and more for High Speed PacketAccess, the HSPA) introducing in and along with the VoIP business inserts in high-speed packet.Therefore, how to improve the efficiency of transmission of small data packets, become problem demanding prompt solution.
Summary of the invention
In view of this, the embodiment of the invention discloses a kind of method of the GTP of transmission packet, this method comprises:
Encapsulation tunneling protocol data cell T-PDU obtains GTP protocol Data Unit G-PDU bag;
A plurality of G-PDU claddings are used together;
By the transmission path agreement described multiplexing G-PDU bag is together encapsulated;
Send the described data message that obtains through the transmission path protocol encapsulation.
Simultaneously, the embodiment of the invention also discloses a kind of GTP tunnel endpoint device, this equipment comprises:
Encapsulation unit is used to encapsulate T-PDU, obtains the G-PDU bag;
Multiplexing Unit is used for a plurality of G-PDU claddings that described encapsulation unit encapsulation obtains are used together, and by the transmission path agreement described multiplexing G-PDU bag is together encapsulated, and obtains data message to be sent;
Transmitting element is used to send the described data message that described Multiplexing Unit encapsulation obtains.
Compare than prior art, the technical scheme that the embodiment of the invention provided can improve efficiency of transmission by with a plurality of G-PDU claddings transmission together, saves transmission bandwidth; Simultaneously, can also reduce the number of transmitting packet in the transmission network, reduce the load of transmission network.
Description of drawings
Fig. 1 is the professional and encapsulation schematic diagram of VoIP speech business by upward transmitting at Ethernet (Ethernet) after the GTP-U protocol encapsulation of general data in the prior art;
Fig. 2 is the schematic diagram that passes through GTP-U protocol encapsulation data in the prior art;
Fig. 3 carries out multiplexing schematic diagram for the embodiment of the invention to the G-PDU bag;
Fig. 4 is a kind of method flow diagram that transmits GTP protocol data bag of the embodiment of the invention;
Fig. 5 is a kind of GTP tunnel endpoint device of embodiment of the invention structural representation.
Embodiment
For making technical scheme of the present invention and advantage clearer, embodiments of the invention are described in further detail below in conjunction with accompanying drawing.
In the prior art, the GTP agreement can comprise GTP chain of command (GTP Control plane, GTP-C) agreement and GTP user's face (GTP User plane, GTP-U) agreement, and the GTP ' agreement relevant with charging.Wherein, GTP-C is used for creating, revises and the deletion tunnel; GTP-U is used for the carrying user data bag.
As shown in table 1, GTP form be applicable to GTP-C and GTP-U, variable-length, and minimum length is 8 bytes.Wherein, there are 3 signs to be used to indicate whether to exist optional part: E sign, S sign and PN sign.The E sign is used to indicate whether exist the expansion header field, and the S sign is used to indicate whether to exist sequence number, and the PN sign is used to indicate whether to exist N-PDU (Network Protocol Data Unit, network protocol data unit) number.Version field is used to identify the version of GTP agreement.The PT sign is used to distinguish agreement, and PT=1 is the GTP agreement, and PT=0 is GTP ' agreement.
Table 1
The GTP-U tunnel be used to carry the tunnel protocol data cell that encapsulates between a pair of given GTP-U endpoint of a tunnel (Tunneling Protocol Data Unit, T-PDU) and signaling message.(Tunnel Endpoint Identifier, TEID) territory is used to indicate a specific T-PDU to belong to which tunnel to Tunnel End Point Identifier in the GTP head.TEID value in the TEID territory can obtain through consultation, for example can create packet data protocol (Packet Data Protocol at GTP-C, PDP) (Radio Access Bearer consults the TEID value during RAB) the appointment process during the context or at the RAB of chain of command.
Fig. 2 is the schematic diagram that passes through GTP-U protocol encapsulation terminal use data in the prior art.
As shown in Figure 2, (GTP Protocol Data Unit G-PDU) comprises GTP-U head and T-PDU to the GTP protocol Data Unit; Wherein, T-PDU is terminal use's data.G-PDU transmits on communication networks such as UMTS/GPRS backbone network after adopting the transmission path protocol encapsulation.According to the 3GPP standard, and User Datagram Protoco (UDP) (User Datagram Protocol, UDP)/the IP agreement is that GTP version 1 transmits the GTP protocol of messages.
Fig. 3 carries out multiplexing schematic diagram for the embodiment of the invention to the G-PDU bag.
As shown in Figure 3, terminal use's data can adopt IP agreement or other protocol encapsulation, GTP-U tunnel transmitting terminal is named a person for a particular job terminal use's data through IP agreement or other protocol encapsulation as T-PDU, and is that each T-PDU adds the GTP-U head, and GTP-U head and T-PDU combine as G-PDU.Then with a plurality of G-PDU cladding with together as the payload of UDP, adopt the udp protocol encapsulation, transmit in the packet switching network by IP/Ethernet encapsulation back again.Those skilled in the art will appreciate that adopting the transmission in the packet switching network of IP/Ethernet encapsulation back only is an example, is not to be used to limit the present invention.
Reception end points in the GTP-U tunnel can read out first T-PDU according to the length field in the GTP-U head of first G-PDU bag in the UDP payload, and can identify the pairing user of first T-PDU according to the TEID in first GTP-U head;
Determine the original position of second G-PDU bag then according to the length of first T-PDU, read out second T-PDU according to the length field in the GTP-U head of second G-PDU bag, and can identify second pairing user of T-PDU according to the TEID in the GTP-U head of this G-PDU bag;
Repeat above operation, up to identifying each T-PDU and the pairing user of each T-PDU of multiplexing G-PDU bag institute correspondence together.
In the embodiments of the invention, a plurality of G-PDU are wrapped the payload that is multiplexed with the UDP message, share the transport layer expense, not only can improve the efficiency of transmission of network, save transmission bandwidth; Simultaneously, can also reduce the number of transmitting packet in the transmission network, reduce the load of transmission network.
Fig. 4 is a kind of method flow diagram that transmits GTP protocol data bag of the embodiment of the invention.
As shown in Figure 4, in the present embodiment, the endpoint device at two ends, GTP-U tunnel can adopt the mode of negotiation, with the multiplexing parameters that determines whether to support that GTP is multiplexing and consult to be correlated with.Below describe the flow process of this embodiment in detail:
Step 401: send end points and send GTP-U multiplex consultation request message to receiving end points.
In this step, comprise the multiplex consultation parameter in this GTP-U multiplex consultation request message.Alternatively, described multiplex consultation parameter can comprise multiplexing time delay value, whether support GTP-U header format of simplifying etc.
Step 402: receive end points and return GTP-U multiplex consultation response message to sending end points.
In this step, after receiving this GTP-U multiplex consultation request message, support G-PDU cladding usefulness if receive end points, then will receive the multiplexing parameters that end points supports and send to GTP-U tunnel transmission end points by GTP-U multiplex consultation response message according to the multiplex consultation parameter in this GTP-U multiplex consultation request message.
If receive the multiplex consultation parameter of sending that end points does not support to send end points, can in the GTP-U multiplex consultation response message that returns, carry and receive the multiplexing parameters that end points is supported.Send the multiplexing parameters that end points can be determined between the two-end-point to be adopted according to the multiplexing parameters in this response message.
Do not support the G-PDU packet multiplexing if receive end points, then receive end points and return and comprise the response message of not supporting GTP-U multiplexed information to sending end points, and process ends.
Step 403: transmitting terminal is named a person for a particular job a plurality of G-PDU cladding usefulness together, sends to the reception end points after encapsulating by the transmission path agreement.
In the embodiment of the invention, can such as in IP network, transmitting, send to the reception end points after then can multiplexing G-PDU bag together being encapsulated according to concrete transmission network by transmission path agreement UDP/IP.
In the embodiment of the invention, can multiplexing condition be set, the G-PDU cladding of satisfying multiplexing condition is being used together the G-PDU cladding time spent.For example, multiplexing condition can for: multiplexing G-PDU bag in a data message has identical purpose IP address.
Further, adopting the transmission path agreement is in the transmission network of UDP/IP, for avoiding taking place the IP fragmentation on the transmission link, the maximum length that can dispose the data message that obtains through the transmission path protocol encapsulation be not more than the MTU that the GTP transmission path supports (Maximum TransmissionUnit, MTU).
Further, the maximum length of the data message that obtains through the transmission path protocol encapsulation is not more than the maximum frame size that data link layer is supported.
Further, for fear of in network, introducing too much time delay, can also be provided with the time delay of G-PDU cladding with process.Such as, the time delay that G-PDU cladding usefulness can be set is no more than 1ms or 2ms; Can reduce the shake that multiplex process brings effectively like this.During specific implementation, can a timer be set, if this timer expiry then encapsulates current multiplexing G-PDU bag and send carrying out the G-PDU cladding time spent.
Further, the bag of the G-PDU in the multiplexing data message can be to have identical QoS.Such as, identical DiffServ (Differentiated Services, differentiated service), same priority formation etc.
Further, multiplexing can only the bag at short G-PDU.Such as, can set in advance the G-PDU bag that is re-used and be no more than certain-length.
It will be understood by those skilled in the art that the maximum length through the data message of multiplexing, encapsulation back generation can also be configured flexibly according to the actual state of above said multiplexing condition or network.
Step 404: receive the data message that end points receiving end/sending end point sends, multiplexing G-PDU bag together obtains T-PDU in this data message of demultiplexing.
In this step, can carry out demultiplexing in the following way:
Read first T-PDU according to the length field in the GTP-U head of first G-PDU bag in the multiplexing G-PDU bag together, and determine the pairing user of this T-PDU according to the TEID in the GTP-U head of first G-PDU bag.
Then, determine the original position that second G-PDU wraps, read second T-PDU according to the length field in the GTP-U head of second G-PDU bag again according to the length of first T-PDU; And determine second pairing user of T-PDU according to the TEID in the GTP-U head of second G-PDU bag.
Repeat above operation, T-PDU all in having read the data message that receives wrap.
After this, need send the multiplexing UDP message of GTP-U to sending end points, then can carry out multiplexing according to the multiplexing parameters that has consulted if receive end points.
Those skilled in the art will appreciate that the GTP agreement can be applied to lower interface:
1, (Public Land Mobile Network, PLMN) the internodal gp interface of GSN between internodal gn interface of inner GSN and the different PLMN also have the Ga interface between GSN and the charging gateway to same public land mobile radio communication.
2, SGSN and UMTS Terrestrial radio access network (UMTS TerrestrialRadio Access Network, radio network controller UTRAN) (Radio NetworkController, RNC) Iu-PS interface between in the UMTS network.
3, in evolution HSPA framework, the Gn-U interface between enhanced base station (Node B+) and the GGSN.
4, Long Term Evolution (Long Term Evolution, LTE) the S1/X2 interface of the evolved base station in the framework (eNodeB).
Therefore, transmission end points in the embodiment of the invention and reception end points can be respectively:
1, GSN and GSN;
2, GSN and RNC;
3, GSN and NodeB+;
4, the System Architecture Evolution gateway (System Architecture Evolution GateWay, SAEGW) and eNodeB;
5, eNodeB and eNodeB.
Those skilled in the art will appreciate that as long as the packet that sends between end points and the reception end points can use the GTP agreement to transmit, just can be suitable for the scheme of the embodiment of the invention.Therefore, more than describing only is to sending end points and receiving giving an example of end points, is not to be used to limit the present invention.
In the practical application, can increase multiplexing request message of GTP-U and GTP-U response message, be used to consult endpoint of a tunnel equipment and whether support the multiplexing function of GTP-U and consult to determine relevant multiplexing parameters at two ends, GTP-U tunnel chain of command.Such as, for gn interface and gp interface, consult the multiplexing function of GTP-U, also similarly for the relevant interface of HSPA+ and LTE by increase message at GTP-C plane.It will be understood by those skilled in the art that this GTP-U multiplex consultation request message can send on any one spendable path in network.
Among the above embodiment, the end points at two ends, GTP-U tunnel adopts the mode of consulting to determine whether to support that GTP is multiplexing and consult relevant multiplexing parameters, can carry out the multiplexing of packet quickly and efficiently like this.It will be understood by those skilled in the art that the endpoint device that can also directly the GTP multiplexing parameters be configured in two ends, GTP-U tunnel or be configured, and need not to hold consultation by the end points of other network elements to two ends, GTP-U tunnel.
Fig. 5 is the structural representation of a kind of GTP tunnel endpoint device of the embodiment of the invention.
As shown in Figure 5, a kind of GTP tunnel endpoint device of the embodiment of the invention comprises:
Encapsulation unit is used to encapsulate T-PDU, obtains the G-PDU bag;
Multiplexing Unit is used for a plurality of G-PDU claddings that the encapsulation unit encapsulation obtains are used together, and by the transmission path agreement described multiplexing G-PDU bag is together encapsulated, and obtains data message to be sent;
Transmitting element is used to send the described data message that obtains through described Multiplexing Unit encapsulation.
Further, this GTP tunnel endpoint device also comprises:
Multiplexing condition setting unit is used to be provided with described Multiplexing Unit the G-PDU bag is carried out multiplexing condition when multiplexing.
Wherein, this multiplexing condition can be set to:
Multiplexing G-PDU bag in a data message has identical target ip address.
Further, be in the transmission network of UDP/IP adopting the transmission path agreement, for avoiding taking place the IP fragmentation on the transmission link, following multiplexing condition can also be set:
The maximum length of the data message that obtains through the transmission path protocol encapsulation is not more than the maximum transmission unit value that the GTP transmission path is supported;
Further, multiplexing condition can also be set is: the maximum length of the data message that obtains through the transmission path protocol encapsulation is not more than the maximum frame size that data link layer is supported;
Further, multiplexing condition can also be set is:
Multiplexing G-PDU bag in a data message has identical QoS.
Further, this GTP tunnel endpoint device can also comprise:
Negotiation element is used for receiving the multiplexing parameters that the negotiation of end points end equipment is supported with GTP tunnel.
Wherein, described multiplex consultation parameter can comprise multiplexing time delay value, whether support GTP-U header format of simplifying etc.
Further, this GTP tunnel endpoint device can also comprise:
Time delay control unit is used to control Multiplexing Unit the G-PDU bag is carried out the multiplexing time.
Those skilled in the art will appreciate that this GTP tunnel endpoint device not only can be used as the transmission end points and sends datagram, can also be as receiving the end points receiving data packets.Therefore, as shown in Figure 5, in the embodiment of the invention, this GTP tunnel endpoint device can also comprise the receiver side of receiving data packets except the above transmitter side that is used to send datagram.The receiver side of this GTP tunnel endpoint device comprises:
Receiving element has been used to receive multiplexing the data message that a plurality of G-PDU wrap;
Demultiplexing unit, the multiplexing bag of G-PDU together that is used for data message that receiving element is received carries out demultiplexing, obtains the T-PDU bag.
Further, the receiver side of this GTP tunnel endpoint device can also comprise:
The ownership determining unit is used for determining that according to the Tunnel End Point Identifier TEID of the GTP-U head of G-PDU bag each T-PDU that this demultiplexing unit demultiplexing obtains wraps pairing user.
It will be understood by those skilled in the art that in the embodiment of the invention that the negotiation element of transmitter side also can be used for this GTP tunnel endpoint device is carried out multiplexing parameters when receiving data packets negotiation.
The technical scheme that the embodiment of the invention adopted is carried out multiplexing to the G-PDU bag that transmits in GTP tunnel, not only can promote efficiency of transmission, saves transmission bandwidth; Simultaneously, also can reduce the number of transmitting packet in the transmission network, reduce the load of transmission network.
Relevant with factors such as multiplexing bag number, terminal use's data packet lengths to the G-PDU cladding with the gain or the beneficial effect that bring.
Suppose that physical layer is an Ethernet interface, supported vlans, IPv4 then equals the T-PDU bag of 50 bytes to a length, and the average expense of the transport layer when not multiplexing equals 58 bytes, and efficiency of transmission is 46.3% (50/ (50+58) * 100%); 2 claddings equal 33 bytes with the average expense of transport layer under the situation, and efficiency of transmission is 60.24% (50/ (50+33) * 100%); 10 claddings equal 13 bytes with the average expense of transport layer under the situation, efficiency of transmission 79.37% (50/ (50+13) * 100%).
Further, establish the T-PDU=50 byte, grouping generation time 10ms, 2 cladding usefulness and 10 bandwidth gains (physical layer bandwidth) that clad the times spent are as shown in table 2:
| Ethernet interface [IPv4] | Ethernet interface [IPv6] | |
| Reference bandwith | 102.4kbps | 118.4kbps |
| Bandwidth [2 claddings are used] | 74.4kbps | 82.4kbps |
| Bandwidth reduces | 27％ | 30％ |
| Bandwidth [10 claddings are used] | 52kbps | 53.6kbps |
| Bandwidth reduces | 49％ | 55％ |
Table 2
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (20)
1, a kind of method of transmitting GPRS Tunnel Protocol GTP packet is characterized in that,
Encapsulation tunneling protocol data cell T-PDU obtains GTP protocol Data Unit G-PDU bag;
A plurality of G-PDU claddings are used together;
By the transmission path agreement described multiplexing G-PDU bag is together encapsulated;
Send the described data message that obtains through the transmission path protocol encapsulation.
2, method according to claim 1 is characterized in that, described method also comprises being provided with carries out multiplexing condition to the G-PDU bag, and described multiplexing condition is:
Multiplexing G-PDU bag in a data message has identical target ip address.
3, method according to claim 1 is characterized in that, described multiplexing condition also comprises:
The maximum length of the data message that obtains through the transmission path protocol encapsulation is not more than the maximum transmission unit value that the GTP transmission path is supported;
The maximum length of the data message that obtains through the transmission path protocol encapsulation is not more than the maximum frame size that data link layer is supported in the transmission network.
4, method according to claim 1 is characterized in that, described multiplexing condition also comprises:
Multiplexing G-PDU bag in a data message has identical service quality QoS.
5, method according to claim 1 is characterized in that, a plurality of G-PDU claddings are used together; By the transmission path agreement described multiplexing G-PDU bag is together encapsulated and to comprise:
Multiplexing G-PDU starts a timer when wrapping;
If described timer expiry then encapsulates multiplexing G-PDU bag by the transmission path agreement.
6, method according to claim 1 is characterized in that, described method also comprises:
Receive end points and receive the described data message that obtains through the transmission path protocol encapsulation;
Multiplexing G-PDU bag together obtains T-PDU in the data message of the described reception of demultiplexing.
7, according to claim 6 a described method, it is characterized in that,
Multiplexing G-PDU bag together in the data message of the described reception of demultiplexing obtains T-PDU and comprises:
Read first T-PDU according to the length field in the GTP-U head of first G-PDU bag in the described multiplexing G-PDU bag together;
Determine the original position that next G-PDU wraps according to the length of described first T-PDU, and read next T-PDU according to the length field in the GTP-U head of described next G-PDU bag;
Repeat above step, all T-PDU in having read described data message.
8, method according to claim 6 is characterized in that, described method also comprises:
Determine the pairing user of described each T-PDU according to the Tunnel End Point Identifier TEID in each GTP-U head.
9, method according to claim 1 is characterized in that, described encapsulation T-PDU obtains G-PDU bag and is:
Adopt the described T-PDU of GTP user's face GTP-U protocol encapsulation, obtain described G-PDU bag.
10, method according to claim 1 is characterized in that, described transmission path agreement is the UDP/IP agreement.
11, according to each described method of claim 1 to 10, it is characterized in that described method further comprises:
Send GTP-U multiplex consultation request message to GTP tunnel and receive end points, comprise the multiplex consultation parameter in the described multiplex consultation request message;
GTP tunnel receives end points and returns GTP-U multiplex consultation response message, comprises in the described GTP-U multiplex consultation response message to consult definite multiplexing parameters.
12, method according to claim 11 is characterized in that, described multiplex consultation parameter comprises whether supporting to simplify GTP-U head and/or multiplexing delay parameter.
13, a kind of GTP tunnel endpoint device is characterized in that, comprising:
Encapsulation unit is used to encapsulate T-PDU, obtains the G-PDU bag;
Multiplexing Unit is used for a plurality of G-PDU claddings that described encapsulation unit encapsulation obtains are used together, and by the transmission path agreement described multiplexing G-PDU bag is together encapsulated, and obtains data message to be sent;
Transmitting element is used to send the described data message that described Multiplexing Unit encapsulation obtains.
14, GTP tunnel endpoint device according to claim 13 is characterized in that, described GTP tunnel endpoint device further comprises:
Multiplexing condition setting unit is used to be provided with described Multiplexing Unit the G-PDU bag is carried out multiplexing condition when multiplexing, and described multiplexing condition comprises:
Multiplexing G-PDU bag in a data message has identical target ip address.
15, GTP tunnel endpoint device according to claim 13 is characterized in that, described multiplexing condition also comprises:
The maximum length of the data message that obtains through the transmission path protocol encapsulation is not more than the maximum transmission unit value that the GTP transmission path is supported;
The maximum length of the data message that obtains through the transmission path protocol encapsulation is not more than the maximum frame size that data link layer is supported in the transmission network.
16, GTP tunnel endpoint device according to claim 13 is characterized in that, described multiplexing condition also comprises:
Multiplexing G-PDU bag in a data message has identical service quality QoS.
17, GTP tunnel endpoint device according to claim 13 is characterized in that, described GTP tunnel endpoint device further comprises:
Negotiation element is used for receiving end points end equipment with GTP tunnel and consults the multiplexing parameters of cladding time spent to G-PDU.
18, GTP tunnel endpoint device according to claim 13 is characterized in that, described GTP tunnel endpoint device further comprises:
Time delay control unit is used to control Multiplexing Unit the G-PDU bag is carried out the multiplexing time.
19, according to any described GTP tunnel endpoint device of claim 13-18, it is characterized in that described GTP tunnel endpoint device further comprises:
Receiving element has been used to receive multiplexing the data message that a plurality of G-PDU wrap;
Demultiplexing unit is used for the multiplexing G-PDU bag together of data message that the described receiving element of demultiplexing receives, and obtains the T-PDU bag.
20, GTP tunnel endpoint device according to claim 19 is characterized in that, described GTP tunnel endpoint device further comprises:
The ownership determining unit is used for determining that according to the Tunnel End Point Identifier TEID of the GTP-U head of G-PDU bag each T-PDU that described demultiplexing unit demultiplexing obtains wraps pairing user.
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| CN102118356A (en) * | 2009-12-30 | 2011-07-06 | 华为技术有限公司 | Message transmission method and transmission device |
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