CN103024816B - Data transmission method and system - Google Patents

Abstract

The invention discloses a data transmission method and system. The method comprises: 3G RNC receives data from an IU interface, splits it, sends 3G data to 3G NodeB, and sends 4G data to 4G eNodeB; 3G NodeB Send the received 3G data to the UE; the 4G eNodeB sends the received 4G data to the UE. The present invention can solve the problem in the related art that a large amount of resources are needed to establish a new physical connection between the NodeB and the eNodeB in the case of a large number of NodeBs.

Description

Data transmission method and system

technical field

The present invention relates to the communication field, in particular, to a data transmission method and system.

Background technique

In the Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access) network, the Universal Terrestrial Radio Access Network (UTRAN, Universal Terrestrial Radio Access Network) includes a radio network controller (RNC, Radio Network Controller) and a base station (NodeB) Two basic network elements, commonly known as 3G network. In a Long-Term Evolution (LTE, Long Time Evolution) network, an evolved universal terrestrial radio access network E-UTRAN includes an evolved base station eNodeB (eNB), which is a basic network element, commonly known as a 4G network.

With the development of WCDMA network, High Speed Downlink Packet Access (HSDPA, High Speed Downlink Packet Access), High Speed Uplink Packet Access (HSUPA, High Speed Uplink Packet Access), Dual Carrier High Speed Downlink Packet Access (DC- HSDPA, Dual Carrier-High speeddownlink packet access), dual-band dual-carrier high-speed downlink packet access (DB-DC-HSDPA, Dual band-Dual carrier-high speed downlink packet access), dual-carrier high-speed uplink packet access (DC-HSUPA , Dual Carrier-high speed uplink packet access), four-carrier high-speed downlink packet access (4C-HSDPA, Four carrier-high speed downlink packet access), eight-carrier high-speed downlink packet access (8C-HSDPA, Eight carrier-high speed Downlink packet access) and these multi-carrier aggregation technologies in the 3G system have been introduced successively, so that the uplink and downlink data transmission rate of user equipment (UE, User Equipment) has been doubled and improved continuously. For the above-mentioned multi-carrier technologies with different dimensions, taking the downlink direction as an example, an important basic feature is that the UE must be equipped with multiple 3G-related receiving data processing chains (3G-Receiver Chain), which can simultaneously receive and process data from the same In the same sector of the base station, the 3G data blocks sent by several carriers uplink and downlink. The WCDMA system evolved to today is also called: HSPA+ system (High Speed PacketAccess+).

With the development of LTE network, CA (carrier aggregation), a technology similar to the concept of WCDMA multi-carrier aggregation, has gradually emerged. Take the downlink direction as an example. Up to now, the LTE system can aggregate up to five carriers with a downlink bandwidth of 20MHz. One of the important basic features is that the UE must be equipped with multiple 4G-related receiving data processing chains (4G-Receiver Chain), which can receive and process data from the same base station and the same sector (sector) at the same time. 4G data block coming.

During the long-term evolution of the HSPA+ network deployed by the operator to the LTE network, there must be a long period of time when the two systems coexist and work together to jointly undertake the task of data transmission from or to the core network side. For example: An operator has two carrier frequency resources F1 and F2, and allocates F1 to HSPA+ network operation, and allocates F2 to LTE network operation. For its network, terminals with only 3G functions can only work on F1, terminals with only 4G functions can only work on F2, terminals with both 3G and 4G functions can only work on F1 or F2 at the same time work on F1 and F2 at the same time. Then, in order to make full use of the receiving capability of this type of UE and increase the peak downlink rate, 7G technology (3G+4G), also known as cross-HSPA+LTE system carrier aggregation technology, was born.

The prototype architecture of the current 7G technology is shown in Figure 1, in which the LTE base station eNB serves as the main control anchor point and data distribution control point for the terminal Radio Resource Control (RRC, Radio Resource Connection) connection. In Figure 1, the eNB uses the S1 interface to receive data from the MME/SGW, and sends 4G data to the LTE UE through the LTE system, or the LTE+HSPA aggregation UE. On the 3G side, the RNC uses the IU (Interface Unit, interface unit) interface to receive data from the SGSN, and sends it to the NodeB through the IUB interface, and the NodeB sends the 3G data to the LTE+HSPA aggregation UE through HSPDA, or HSPA UE. Among them, NodeB and eNB are connected through X2 and IUB alike interface.

Taking Figure 1 as an example, the scheduling command (such as: resource allocation, hybrid automatic repeat request (HARQ, Hybrid Automatic Repeat Request) operation related information) in the Physical Downlink Control Channel (PDCCH, PhysicalDownlinkControl Channel) of the UE on a certain working carrier of the eNB Under control, receive a part of user data from a Physical Downlink Shared Channel (PDSCH, Physical Downlink Shared Channel). At the same time, under the control of the scheduling command of the high-speed shared control channel (HS-SCCH, High Speed Shared Control Channel) on a certain working carrier of the NodeB, the UE starts from the high-speed downlink shared channel (HS-DSCH, High Speed-Downlink Shared Channel) Receive another portion of user data. The anchor eNB is responsible for distributing the upper-layer protocol data packets generated by the eNB, and decides which part of the data packets is sent from the air interface of LTE and which part of the data packets is sent from the air interface of HSPA+ according to a certain method. The protocol data packets allocated to the NodeB need to be transmitted through a new interface between the eNB and the NodeB, and the NodeB sends it according to its own protocol characteristics and the HSPA+ air interface.

There is no conflict between 7G technology and carrier aggregation technology in HSPA+ system or LTE system. That is to say: the UE may receive data on M carriers of the HSPA+ system, and simultaneously receive data on N carriers of the LTE system. The basic working principle is the same as above, and it can be expanded to a higher dimension.

7G aggregation technology can fully and flexibly utilize the different distribution characteristics of 3G and 4G system resources. On the basis of existing methods such as cross-system load balancing, switching, and redirection (redirect) in the past, it can realize 3G and 4G in a deeper level. System collaboration. 3G and 4G systems can not only share different types of services (such as voice services try to pass through the HSPA+ system circuit switching (CS, Circuit Switch) domain, high-speed data services try to pass through the LTE system), but also undertake the same services at the same time (such as: data business is assigned to two systems for simultaneous transmission).

However, the structure corresponding to the 7G aggregation technology has some disadvantages that need to be resolved. Specifically, for the physical connection between NodeB and eNodeB, due to the original commercial bureau, the number of NodeBs is generally large, and the connection between each NodeB and eNodeB needs to be established. consumes resources. Therefore, in the case of a large number of NodeBs, it will consume a lot of resources to completely establish a new physical connection, which is almost impossible.

In the related art, when the number of NodeBs is large, it takes a lot of resources to establish new physical connections between all NodeBs and eNodeBs, and no effective solution has been proposed yet.

Contents of the invention

Aiming at the problem in the related art that it takes a lot of resources to establish new physical connections between all NodeBs and eNodeBs when the number of NodeBs is large, the present invention provides a data transmission method and system to at least solve above question.

According to one aspect of the present invention, a data transmission method is provided, including: the third-generation radio network controller 3G RNC receives the data, and distributes it, sends the 3G data to the third-generation base station 3G NodeB, and transmits the 4G data to the third-generation base station 3G NodeB. The 3G NodeB sends the received 3G data to the user equipment UE; the 4G eNodeB sends the received 4G data to the UE.

Preferably, the 3GRNC receiving data includes: the 3GRNC receiving data from an IU interface.

Preferably, after the 3GRNC receives the data from the IU interface and before distributing the data, it includes: the 3GRNC identifies a corresponding serial number to the data received from the IU interface.

Preferably, the 3G RNC is coupled with the 4G eNodeB through a specified interface, wherein the specified interface matches the IU interface of the 3G RNC and matches the X2 interface of the 4G eNodeB.

Preferably, the protocol hierarchy relationship of the specified interface includes: General Packet Radio Service Tunneling Protocol user plane part GTPU, User Datagram Protocol UPD and Internet Protocol IP layer in sequence.

Preferably, the 3G RNC receives the data from the IU interface and distributes it, including: the 3G RNC performs packet data convergence protocol PDCP distribution on the data received from the IU interface according to a first preset rule; or the The 3GRNC performs radio link control RLC offloading on the data received from the IU interface according to the second preset rule.

Preferably, the first preset rule includes any one of the following: the data of the same transmission control protocol TCP connection is divided into 3G data; the data of the same TCP connection is divided into 4G data; the priority is lower than The data with the preset priority is divided into 3G data; the data with a priority higher than the preset priority is divided into 4G data; if the 3G data cache in the PDCP buffer is more than the preset threshold value, select the specified number 3G data, convert it into 4G data; if the 4G data cache in the PDCP buffer is more than the second preset threshold value, select a specified number of 4G data, and convert it into 3G data .

Preferably, the second preset rule includes any one of the following: the uplink status packet of the RLC layer is divided into 3G data; the sending of the uplink status package is prohibited within the set time; the uplink normal data is divided into 3G data, Send through the 3G air interface; the 4G eNodeB sends its own air interface transmittable traffic threshold to the 3G RNC, and the 3G RNC ensures that the downlink traffic distributed to the 4G eNodeB is less than the air interface transmittable traffic threshold.

Preferably, after the 3G NodeB sends the received 3G data to the UE, after the 4G eNodeB sends the received 4G data to the UE, the method further includes: the UE receiving the 3G data and the 4G data are sorted according to the sequence numbers identified on each data.

Preferably, the method is applied to 3G and 4G carrier aggregation systems.

According to another aspect of the present invention, a data transmission system is provided, including a third-generation radio network controller 3GRNC, a third-generation base station 3G NodeB, a fourth-generation evolved base station 4G eNodeB, and user equipment UE: the 3G RNC , for receiving data and splitting it, sending 3G data to the 3G NodeB, and sending 4G data to the 4G eNodeB; the 3G NodeB is used for sending the received 3G data to the UE; the 4G eNodeB is configured to send the received 4G data to the UE.

Preferably, the 3GRNC is also used to receive data from the IU interface.

Preferably, the 3GRNC is also used to identify a corresponding sequence number for the data received from the IU interface.

Preferably, the 3GRNC includes: a first distribution module, configured to perform packet data convergence protocol PDCP distribution on the data received from the IU interface according to a first preset rule; a second distribution module, used to perform distribution according to a second preset rule The rule performs radio link control RLC offloading on the data received from the IU interface.

Preferably, the UE is used to receive the 3G data and the 4G data, and sort according to the sequence numbers marked on each data.

In the embodiment of the present invention, the 3G RNC is used to connect to the 4G eNodeB, and after the data received by the 3G RNC is distributed, the 3G data is sent to the 3G NodeB, and the 4G data is sent to the 4G eNodeB. That is, in the embodiment of the present invention, the connection between NodeB and eNodeB mentioned in the related art is replaced by using 3G RNC to connect with 4G eNodeB. Since the number of RNCs in the system is much smaller than the number of NodeBs, even In the case of a large number of NodeBs, it will not consume a lot of resources like related technologies, so as to achieve the purpose of saving resources.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a schematic diagram of an eNB-based control anchor architecture according to related technologies;

Fig. 2 is a processing flowchart of a data transmission method according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an interface structure of a 3G and 4G carrier aggregation scenario according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an implementation environment of Embodiment 1 according to an embodiment of the present invention;

FIG. 5 is a specific flowchart of a data transmission method according to Embodiment 1 of an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an implementation environment of Embodiment 2 according to an embodiment of the present invention;

FIG. 7 is a specific flowchart of a data transmission method according to Embodiment 2 of the embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a data transmission system according to an embodiment of the present invention;

Fig. 9 is a schematic structural diagram of a 3G RNC according to an embodiment of the present invention.

detailed description

Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

As mentioned in related technologies, the structure corresponding to 7G aggregation technology has some disadvantages that need to be resolved. Specifically, for the physical connection between NodeB and eNodeB, due to the original commercial bureau, the number of NodeBs is generally large, and the connection between each NodeB and eNodeB It takes resources to establish a connection between them. Therefore, in the case of a large number of NodeBs, it will consume a lot of resources to establish all new physical connections, which is almost impossible.

In order to solve the above technical problems, an embodiment of the present invention provides a data transmission method, the processing flow of which is shown in Figure 2, including:

Step S202, the 3G RNC receives the data and distributes it, sends the 3G data to the 3GNodeB, and sends the 4G data to the 4G eNodeB;

Step S204, the 3G NodeB sends the received 3G data to the UE;

In step S206, the 4G eNodeB sends the received 4G data to the UE.

In the embodiment of the present invention, the 3G RNC is used to connect to the 4G eNodeB, and after the data received by the 3G RNC is distributed, the 3G data is sent to the 3G NodeB, and the 4G data is sent to the 4G eNodeB. That is, in the embodiment of the present invention, the connection between NodeB and eNodeB mentioned in the related art is replaced by using 3G RNC to connect with 4G eNodeB. Since the number of RNCs in the system is much smaller than the number of NodeBs, even In the case of a large number of NodeBs, it will not consume a lot of resources like related technologies, so as to achieve the purpose of saving resources.

During the implementation process, the order of step S204 and step S206 is parallel, and there is no sequence between them.

Wherein, the data received by the 3G RNC can usually be received through the IU interface.

The process shown in Figure 2, when step S202 is implemented, between the two specific operations involved, that is, after the 3G RNC receives data from the IU interface and before it is distributed, the 3G RNC can also receive data from the IU interface. The serial number corresponding to the data identifier. During the subsequent transmission process, the UE can sort the received data packets according to the sequence numbers on the data packets, avoiding the problem that the data packets cannot be parsed smoothly when the data packets are received out of order.

In the embodiment of the present invention, the 3G RNC and the 4G eNodeB are coupled, and the 3G RNC can transmit the offloaded 4G data to the 4G eNodeB, then the 3G RNC and the 4G eNodeB need to be coupled through a newly added designated interface, and , the specified interface needs to match the IU interface of 3GRNC, and also needs to match the X2 interface of 4G eNodeB. The interface of the original NodeB is basically fixed, and it is difficult to modify it. It can only adapt to the FP interface mode of the IUB port, and the eNodeB has no similar IUB port, and there is no similar IUR port. If a new one is added, a new one is required. If it is added, the interface will change a lot. Furthermore, although the eNodeB has an X2 interface, the X2 interface of the eNodeB is completely different from the original IUR interface, and does not support the macro-diversity mode. Its interface layer is similar to the IU interface of the 3G system, including: GTPU layer (UserPlane part of GPRSTunneling Protocol, UserPlane part of GPRSTunneling Protocol, GPRS (General Packet Radio Service) tunneling protocol user plane part), UDP layer (User Datagram Protocol, User Datagram Protocol) and IP (Internet Protocol, Internet Protocol) layer. Therefore, it is best to connect it with the RNC through the IU port of the RNC.

Therefore, as shown in Table 1, the protocol layer relationship of the designated interface provided by the embodiment of the present invention includes: GTPU layer, UPD layer, and IP layer in sequence.

Table I

GTPU UDP IP

The protocol layer relationship of the specified interface is similar to the IU interface of the 3G system, so the connection or coupling between the 3G RNC and the 4G eNodeB can be better.

In practical applications, since 3G systems generally cover all areas, and 4G systems cover high-speed hot spots, it is more appropriate to use 3G as an anchor point for mobile users. Therefore, the purpose of the embodiment of the present invention is to provide a scenario of LTE and HSPA+carrier aggregation, with 3G as the anchor point, the interface mode between the 3G system and the 4G system, this interface mode can be based on the original structural basic mode as much as possible Make minor modifications to complete. The interface structure of the 3G and 4G carrier aggregation scenarios involved in the data transmission method provided by the embodiment of the present invention is shown in FIG. 3 .

In a preferred embodiment, the 3G RNC receives data from the IU interface and distributes it. There are many ways and rules for the distribution. For example, the data can be distributed in any proportion, and it can be distributed according to a specified ratio. For example, 2:1, 3:1, 4:1, etc., can also be allocated according to the carrying capacity of the 3G or 4G system. Preferably, the distribution can be divided as follows:

The 3G RNC performs PDCP (Packet Data Converge Protocol) on the data received from the IU interface according to the first preset rule; or

The 3G RNC performs RLC (Radio Link Control, radio link control) distribution on the data received from the IU interface according to the second preset rule.

Among them, the first preset rule and the second preset rule can have multiple types, and several preferred rules are listed here. For example, the first preset rule can include any one of the following:

The data of the same TCP (Transmission Control Protocol, Transmission Control Protocol) connection is divided into 3G data;

The data of the same TCP connection is divided into 4G data;

Divide data with a priority lower than the preset priority into 3G data;

Divide data with a priority higher than the preset priority into 4G data;

If the 3G data cache in the PDCP buffer is more than the preset threshold value, select a specified number of 3G data and convert it into 4G data;

If the 4G data cache in the PDCP buffer is more than the second preset threshold value, select a specified amount of 4G data and convert it into 3G data.

The uplink status packet of the RLC layer is shunted into 3G data;

Prohibit sending uplink status packets within the set time;

Divide uplink common data into 3G data and send it through 3G air interface;

The 4G eNodeB sends its own air interface transmittable traffic threshold to the 3G RNC, and the 3G RNC ensures that the downlink traffic diverted to the 4G eNodeB is less than the air interface transmittable traffic threshold. part of the data.

During implementation, after the 3G NodeB sends the received 3G data to the UE, and the 4G eNodeB sends the received 4G data to the UE, it also includes: the UE receives the 3G data and 4G data and sorts them according to the sequence numbers identified on each data .

In summary, the core part of the embodiment of the present invention lies in the spectrum aggregation scenario, and it is proposed to use a new interface configuration structure between network elements. transmission.

In order to explain the data transmission method provided by the embodiment of the present invention more clearly and clearly, the embodiment of the present invention provides two implementation modes, one is to perform offload transmission after the PDCP module processes (Embodiment 1), and the other is to perform After the RLC treatment, split transmission is performed (Example 2). For specific protocol layer processing, see the following embodiments.

Embodiment one

Under this kind of transmission, the biggest problem involved is how to distribute the data transmitted by 4G and 3G. Embodiment 1 adopts the PDCP method for offloading. For the structural diagram of the system involved, please refer to Figure 4. Two independent RLC instances of the system carry out Transmission and feedback to achieve the highest data usage efficiency. In addition, in order to solve the sequence problem of the upper layer data, the sequence number (SN) is marked by PDCP. After the two independent RLC instances of the UE process the data, they are processed according to the sequence number (SN) of PDCP. Sort.

In this example, the following special processing is required for the PDCP offload method:

First, the PDCP module in the 3G RNC puts a sequence number on the received data, and after the two RLC modules on the UE side deliver to the PDCP module, the PDCP layer sorts the data according to the sequence number;

Secondly, the PDCP module in 3GRNC can divide traffic between 4G and 3G according to certain rules. For example, the data of the same TCP connection is divided into 4G or 3G, and high-priority data is sent on 4G, and low-priority data is sent on 3G. send;

In addition, the PDCP module in the 4G eNodeB can also query the data of the 4G and 3G PDCP buffers. If the 3G buffer has more data buffers, it can be sent through 4G, and vice versa.

The specific steps of implementing the data transmission method in this example are shown in Figure 5, including:

Step S502, 3GRNC receives the data of the IU interface;

Step S504, the GTPU module of the 3G RNC deframes the data and transmits it to the PDCP module of the 3G RNC;

Step S506, the PDCP module of the 3G RNC stamps the serial number on the data, and performs splitting, sends the 3G data to the RLC module of the 3G RNC, and sends the 4G data to the 4G eNodeB through the framing of another GTPU module of the 3G RNC;

Step S508, the RLC module of the 3G RNC sends data to the NodeB through the HSFP (Hsdpa Frame Protocol, High Speed Link Packet Access Frame Protocol) module of the 3G RNC;

Step S510, the GTPU module of the 4G eNodeB deframes the data and sends it to the PDCP module of the 4G eNodeB, and the PDCP module of the 4G eNodeB transmits the data to the RLC module of the 4G eNodeB;

Step S512, the RLC module of the 4G eNodeB sends the data to the UE through the MAC (Medium Access Control, Media Access Control) module of the 4G eNodeB;

In step S514, after the HSFP of the 3GNodeB deframes, the data is sent to the UE through the MACEHS module of the 3GNodeB;

In step S516, after the physical layer of the UE decodes the data, it is processed by two independent RLC modules, and then aggregated into one PDCP module for sorting.

Embodiment two

Embodiment 2 uses RLC for splitting. The structural diagram of the system involved is similar to that of Embodiment 1. Please refer to FIG. 6 for details. For the RLC splitting method, the following special processing is required:

First, the PDCP module in the 3G RNC puts serial numbers on the received data, and after RLC out-of-order delivery, the PDCP layer on the UE side sorts according to the serial numbers;

Secondly, since all RLC data packets have been stored in the RLC of the 3G RNC, all uplink status packets of the RLC layer need to be fed back on the 3G system to facilitate retransmission by the 3G system;

And in order to reduce the large amount of feedback caused by RLC disorder, it is necessary to restrict the parameter configuration to reduce the amount of RLC feedback, and it is necessary to configure the uplink status packet prohibition timer to reduce the number of feedback transmissions;

Since the amount of uplink data is generally not large, it is recommended that the uplink ordinary data be sent through the 3G air interface to reduce the forwarding delay;

The 4G side needs to send the data traffic that can be sent to the RLC module of the 3G RNC in the form of a newly defined capability allocation frame, and the RLC module of the 3G RNC is used to determine how much data to send to the RLC module of the 4G eNodeB.

Embodiment 1 uses two independent RLC instance devices, and the PDCP is used for offloading. Relatively speaking, there are many network element modules that pass through. However, in Embodiment 2, the method of using RLC for offloading is more simplified, but at the same time The complexity has increased for the RLC module. At the same time, the PDCP module in the 3G RNC still numbers the data, because both the 3G and 4G RLC modules support out-of-order delivery in this state, and data out-of-order may still occur when delivering to the PDCP module on the UE side. Case.

The specific steps for implementing the data transmission method in this example are shown in Figure 7, including:

Step S702, 3GRNC receives the data of the IU interface;

Step S704, the GTPU module of the 3G RNC deframes the data and transmits it to the PDCP module of the 3G RNC;

Step S706, the PDCP module of the 3G RNC numbers the data and sends it to the RLC module of the 3G RNC;

Step S708, the RLC module of the 3G RNC numbers the data, sends the RLC data assigned to 3G to the 3G NodeB through the HSFP module, and sends the RLC data assigned to 4G to another GTPU frame of the 3G RNC, and then passes IU/X2 interface for forwarding;

Step S710, the GTPU module of the 4G eNodeB will perform special processing to deframe the data. Since it is already RLC data at this time, it can be directly sent to the MAC module of the 4G eNodeB after deframing, and then sent to the UE;

In step S712, after the HSFP module of the 3G NodeB deframes, the data is sent to the UE through the MACEHS module of the 3G NodeB;

In step S714, after the physical layer of the UE decodes the data, only a single RLC module is needed, and the data is reorganized and delivered out of order according to the sequence number, and then aggregated into one PDCP module for reordering.

Based on the same inventive concept, the embodiment of the present invention also provides a data transmission system, the structural diagram of which is shown in Figure 8, including 3G RNC 801, 3GNodeB 802, 4G eNodeB 803 and UE 804:

3G RNC 801, used to receive data and split it, send 3G data to 3G NodeB 802, and send 4G data to 4G eNodeB 803;

3GNodeB 802, coupled with 3G RNC 801 and UE 804, for sending received 3G data to UE804;

The 4G eNodeB 803 is coupled with the 3G RNC 801 and the UE 804 , and is used to send the received 4G data to the UE 804 .

In one embodiment, preferably, the 3G RNC 801 can also be used to receive data from the IU interface.

In one embodiment, preferably, the 3G RNC 801 can also be used to identify a corresponding sequence number for the data received from the IU interface.

In one embodiment, preferably, as shown in FIG. 9, the 3G RNC 801 includes:

The first offloading module 901 is configured to perform packet data convergence protocol PDCP offloading on the data received from the IU interface according to a first preset rule;

The second distribution module 902, coupled with the first distribution module 901, is configured to perform radio link control RLC distribution on the data received from the IU interface according to a second preset rule.

In one embodiment, preferably, the UE 804 may be used to receive 3G data and 4G data, and sort according to the sequence numbers identified on each data.

From the above description, it can be seen that the present invention achieves the following technical effects:

In the embodiment of the present invention, the 3G RNC is used to connect to the 4G eNodeB, and after the data received by the 3G RNC is distributed, the 3G data is sent to the 3G NodeB, and the 4G data is sent to the 4G eNodeB. That is, in the embodiment of the present invention, the connection between the NodeB and the eNodeB mentioned in the related art is replaced by using the 3G RNC to connect with the 4G eNodeB. Since the number of RNCs in the system is much smaller than the number of NodeBs, even In the case of a large number of NodeBs, it will not consume a lot of resources like related technologies, so as to achieve the purpose of saving resources.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Alternatively, they may be implemented in program code executable by a computing device so that they may be stored in a storage device to be executed by a computing device, and in some cases, in an order different from that shown here The steps shown or described are carried out, or they are separately fabricated into individual integrated circuit modules, or multiple modules or steps among them are fabricated into a single integrated circuit module for implementation. As such, the present invention is not limited to any specific combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (11)

1. A kind of 1. data transmission method, it is characterised in that including：

   Third generation radio network controller 3G RNC receive data, and it is shunted, and 3G data are sent to the third generation Base station 3G NodeB, 4G data are sent to forth generation evolved base station 4G eNodeB, wherein, the 3G RNC with it is described It is coupled between 4G eNodeB by specified interface；Wherein, the 3G RNC are from IU interface data, and it is shunted, Including：The 3G RNC are according to the first preset rules to carrying out PDCP from the data of the IU interfaces PDCP is shunted；Or the 3G RNC according to the second preset rules to carrying out Radio Link from the data of the IU interfaces Control RLC shuntings；

   The 3G NodeB send the 3G of reception data to user equipment (UE)；

   The 4G eNodeB send the 4G of reception data to the UE.
2. 2. according to the method for claim 1, it is characterised in that the 3G RNC are after IU interface data, to it Before being shunted, including：The 3G RNC are to sequence number corresponding to the Data Identification from the IU interfaces.
3. 3. according to the method for claim 2, it is characterised in that the IU interface phases of the specified interface and the 3G RNC Match somebody with somebody, match with the X2 interface of the 4G eNodeB.
4. 4. according to the method for claim 3, it is characterised in that the protocol hierarchy relation of the specified interface includes successively：

   General packet wireless service tunnel protocol user plane part GTPU, UDP UPD and Internet Protocol IP Layer.
5. 5. according to the method for claim 1, it is characterised in that first preset rules include following one of any：

   The data of same transmission control protocol TCP connection split into 3G data；

   The data of same TCP connections split into 4G data；

   By priority less than the data that the data distribution of pre-set priority is 3G；

   By priority higher than the data that the data distribution of pre-set priority is 4G；

   If the data buffer storage of the 3G in PDCP buffering areas is more than predetermined threshold value, the 3G of specified quantity data are selected, by its turn Turn to 4G data；

   If the data buffer storage of the 4G in the PDCP buffering areas is more than the second predetermined threshold value, the 4G of specified quantity number is selected According to being translated into 3G data.
6. 6. according to the method for claim 1, it is characterised in that second preset rules include following one of any：

   The uplink state coating of rlc layer splits into 3G data；

   Forbid sending uplink state bag in setting time；

   Up general data is split into 3G data, eats dishes without rice or wine to be transmitted by 3G；

   The transmittable flow threshold of eating dishes without rice or wine of itself is sent to the 3G RNC by the 4G eNodeB, is ensured by the 3G RNC The descending flow for being diverted to the 4G eNodeB is less than the transmittable flow threshold of eating dishes without rice or wine.
7. 7. according to the method described in claim any one of 2-6, it is characterised in that the 3G NodeB are by the 3G's of reception Data are sent to UE, and the 4G eNodeB send the 4G of reception data to the UE, in addition to：The UE The data of the 3G and the data of the 4G are received, are ranked up according to the sequence number identified in each data.
8. 8. according to the method described in claim any one of 1-6, it is characterised in that methods described is applied to 3G and 4G carrier aggregations In system.
9. 9. a kind of data transmission system, it is characterised in that including third generation radio network controller 3G RNC, third generation base station 3G NodeB, forth generation evolved base station 4G eNodeB and user equipment (UE)：

   The 3G RNC, are shunted for receiving data, and to it, and 3G data are sent to the 3G NodeB, by 4G Data send to the 4G eNodeB, wherein, be coupled between the 3G RNC and the 4G eNodeB by specified interface； The 3G RNC are additionally operable to include from IU interface data, the 3G RNC：First diverter module, for default according to first Rule from the data of the IU interfaces to carrying out PDCP PDCP shuntings；Second diverter module, for by According to the second preset rules to carrying out wireless spread-spectrum technology RLC shuntings from the data of the IU interfaces；

   The 3G NodeB, for the 3G of reception data to be sent to the UE；

   The 4G eNodeB, for the 4G of reception data to be sent to the UE.
10. 10. system according to claim 9, it is characterised in that the 3G RNC are additionally operable to from the IU interfaces Data Identification corresponding to sequence number.
11. 11. system according to claim 10, it is characterised in that the UE is used to receive the data of the 3G and the 4G Data, be ranked up according to the sequence number identified in each data.