WO2013159654A1

WO2013159654A1 - Data transmission method and device

Info

Publication number: WO2013159654A1
Application number: PCT/CN2013/074174
Authority: WO
Inventors: 和峰; 艾建勋; 王昕�; 韩立锋
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-04-25
Filing date: 2013-04-12
Publication date: 2013-10-31
Also published as: CN103379590B; CN103379590A

Abstract

Disclosed are a data transmission method and device. The method comprises: an access network element receiving connection information about a multimode terminal in a wireless local area network (WLAN), the multimode terminal at least being able to access the network in which the access network element is located and the first WLAN; and when the access network element determines that the current network can perform joint transmission with the first WLAN, the access network element offloading some or all data of the multimode terminal to the first WLAN. The present invention can be applied to solve the problem that the joint transmission or offloading of two paths of subsequent accesses cannot be achieved.

Description

Data transmission method and equipment

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a data transmission method and apparatus. BACKGROUND With the continuous evolution of wireless communication technologies and standards, mobile packet services have been greatly developed, and the data throughput capability of a single terminal is constantly increasing. For example, in the Long Term Evolution (LTE) system, data transmission with a maximum downlink rate of 100 Mbps can be supported in a 20 M bandwidth. In a subsequent enhanced LTE (LTE Advanced) system, the data transmission rate will be further improved, or even Reached 1Gbps. The inflated growth of terminal data traffic has made existing network resources incapable, especially in the case that next-generation communication technologies (such as 3G and LTE) cannot be widely deployed, followed by user rates and traffic. The demand cannot be met, and the user experience is getting worse. How to prevent and change this situation is an issue that operators must consider. On the one hand, it is necessary to speed up the promotion of new technologies and network deployment. On the other hand, it is hoped that the existing networks and technologies can be enhanced to achieve rapid improvement of network performance. purpose. As is well known, in addition to the wireless network technology provided by The 3rd Generation Partnership Project (3GPP), wireless local area networks (WLANs), especially based on electrical and electronic engineers, are now widely used. The Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard WLAN has been widely used in hotspot access coverage in homes, businesses, and even the Internet. Among them, the technical specifications proposed by the Wi-Fi Alliance are the most widely used. Therefore, the WiFi network is often equated with the WLAN network based on the IEEE 802.11 standard. In the case of no confusion, the WiFi module is also used later. To describe the WLAN-enabled wireless transceiver and processing module in the network node. Under this premise, some operators and companies have proposed to combine WLAN with existing 3GPP networks to achieve joint transmission to achieve load shunting and improve network performance. Although 3GPP has already developed a protocol for interworking between 3GPP networks and WLAN networks, there are still some shortcomings in the current Interworking architecture, such as User Equipment (UE) between the 3GPP network and the WLAN network. The data stream switching is relatively slow when moving. In addition, in this case, the data streams of both networks need to pass through the 3GPP core network element, resulting in a relatively large load. In addition, there is a very important point. The current architecture relies on operators to have independent 3GPP networks and independent and complete WLAN networks. This requires operators to operate and maintain multiple networks at the same time. Capital Expenditure (CAPEX) ) Larger. therefore The need for further integration of WLAN and 3GPP networks has been reintroduced, and new solutions are being gradually proposed and discussed. Among the solutions proposed by different manufacturers, Intel proposed a network convergence scheme similar to carrier aggregation. The general architecture of the scheme is shown in Figure 1. The WLAN is no longer existed as an independent network, but is only used as a data connection between the access network and the terminal in the existing 3GPP network, and the main management and possible partial data of the access network to the UE The transmission is transmitted on a 3GPP network-based connection, which is similar to carrier aggregation, that is, the connection using the 3GPP network is used as the primary carrier, and the WLAN connection established by the access network and the WiFi module on the UE is used as the secondary carrier to implement the primary carrier. The shunt of the transmission. However, under this architecture, 3GPP and WLAN are still two independent access networks. In addition, the carrier requirements also require that the WiFi protocol cannot be modified in order to ensure the compatibility of the WiFi device, which also causes the UE to access the 3GPP network and access respectively. When you are on a WLAN, you don't know each other. Even if the access network and the WiFi module on the network side are co-located, the current protocol cannot guarantee the interoperability of the two. This results in the Intel solution failing to implement the joint transmission or offload of the subsequent two-way access. An effective solution has not been proposed for the joint transmission or offloading of the subsequent two-way access in the related art. SUMMARY OF THE INVENTION The present invention provides a data transmission method and apparatus to solve at least the above problems in view of the problem of joint transmission or offloading of subsequent two-way access in the related art. According to an aspect of the present invention, a data transmission method is provided, including: an access network element receiving connection information of a multimode terminal in a first wireless local area network WLAN network, wherein the multimode terminal is at least capable of accessing the a current network in which the access network element is located and the first WLAN network; when the access network element determines, according to the connection information, that the current network can perform joint transmission with the first WLAN network, The access network element divides part or all of the transmission data of the multimode terminal to the first WLAN network. Preferably, after the access network element divides part or all of the transmission data of the multimode terminal to the first WLAN network, the method further includes: the access network element receiving the multimode terminal in the Connection information in the WLAN network; when the access network element determines, according to the connection information corresponding to the second WLAN network, that the current network can perform joint transmission with the second WLAN network, the access network The network element stops offloading the first WLAN network, and offloads part or all of the transmission data of the multimode terminal to the second WLAN network. Preferably, the connection information includes: WLAN network information accessed by the multimode terminal and/or terminal connection information of the multimode terminal itself. Preferably, the WLAN network information includes at least one of: a basic service set identifier BSSID of the WLAN; a service set identifier SSID of the WLAN; an extended service set identifier ESSID of the WLAN; channel information of the WLAN; The media access control MAC address of the access point of the WLAN network. Preferably, the multimode terminal connection information includes at least one of the following: address information of the multimode terminal in the WLAN network, where the address information includes a media access control MAC address or an internet protocol IP address; The association identifier AID established by the multimode terminal in the WLAN. Preferably, the access network element determines, according to the connection information, that the current network can perform joint transmission with the first WLAN network, and includes: WLAN network information in the connection information and the access network When the WLAN network information corresponding to the WLAN access point function is the same, and the terminal connection information corresponding to the multimode terminal in the connection information can be found in the first WLAN network, the access network Determining that the current network can perform joint transmission with the first WLAN network; or at least one of WLAN network information in the connection information and WLAN network information pre-configured by the access network element for offloading When the items are consistent and can find the terminal connection information corresponding to the multimode terminal in the connection information in the first WLAN network, the access network element determines that the current network can be the first The WLAN network implements joint transmission. Preferably, after the access network element receives the connection information, before the part or all of the transmission data of the multimode terminal is offloaded to the first WLAN network, the network element includes: The multi-mode terminal sends the indication information, indicating whether the multi-mode terminal performs the joint transmission of the network where the multi-mode terminal is located and the first WLAN network, where the indication information includes: the WLAN network information and/or whether to perform the joint Transfer instructions. Preferably, the access network element receives the connection information, including: the access network element receives the connection information reported by the multi-mode terminal by using existing air interface signaling; or the access The network element receives the connection information reported by the multimode terminal by using a newly added air interface message. Preferably, the access network element comprises a network element node of an access network of a third generation partnership plan 3GPP different radio access technology RAT. Preferably, the access network element includes any one of the following: an evolved base station eNB in a long term evolution system LTE network; a radio network subsystem RNS in a universal mobile communication system UMTS network, where the RNS includes wireless network control The RNC and the base station NodeB; the base station system BSS in the GSM network of the Global System for Mobile Communications, wherein the BSS comprises a base station controller BSC and a base station BTS. According to another aspect of the present invention, a data transmission apparatus is provided, which is disposed in an access network element, and includes: a receiving module, configured to receive connection information of a multimode terminal in a first wireless local area network WLAN network, where The multimode terminal is capable of accessing at least the current network where the access network element is located and the first WLAN network; and the offloading module is configured to determine, according to the connection information, that the current network can be connected to the first WLAN When the network implements joint transmission, part or all of the transmission data of the multimode terminal is offloaded to the first WLAN network. Preferably, the receiving module is further configured to receive the connection information of the multimode terminal in the second WLAN network; the offloading module is further configured to determine, according to the connection information corresponding to the second WLAN network, When the current network is capable of performing joint transmission with the second WLAN network, the offloading of the first WLAN network is stopped, and part or all of the transmission data of the multimode terminal is offloaded to the second WLAN network. In the embodiment of the present invention, the access network element receives the connection information of the multimode terminal in the first WLAN network, where the multimode terminal can access at least the current network where the access network element is located and the first WLAN network; When the access network element determines, according to the connection information, that the current network can perform joint transmission with the first WLAN network, the access network element divides part or all of the transmission data of the multimode terminal to the first WLAN network. In this example, the multimode terminal can still access the access network (for example, the 3GPP access network) and the WLAN access point through the existing process, and the offload function is only the 3GPP access network element and the WLAN connected on the network side. Data splitting between the ingress points does not involve terminal side modification, ensuring the compatibility of the WiFi terminal device, and there is no need to modify the existing WiFi protocol; the multimode terminal accesses the network through the same access network element, The access network itself is informed, ensuring the interoperability between the access side and the network side. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a schematic diagram of an Intel fusion scheme according to the related art; FIG. 2 is a flowchart of processing of a data transmission method according to an embodiment of the present invention; FIG. 3 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention; 4 is a process flow diagram of a data transmission method according to Embodiment 2 of the present invention; FIG. 5 is a flowchart of a process of a data transmission method according to Embodiment 3 of the present invention; 6 is a flowchart of processing of a data transmission method according to Embodiment 4 of the present invention; and FIG. 7 is a flowchart of processing of a data transmission method according to Embodiment 5 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The present invention provides a data transmission method, which can help implement the network interworking problem in the Intel solution and ensure the technical problem of the joint transmission or the offloading of the two-way access that is not mentioned in the related art. Compatibility with the WLAN protocol. Since the method is applied to multiple networks, it can also be referred to as a method for realizing acquisition of multi-network joint transmission information. The data transmission method mentioned above will now be described in detail. Referring to FIG. 2, the processing flow of the data transmission method includes steps S202 to S204: Step S202: The access network element receives the connection information of the multimode terminal in the first WLAN network; wherein the multimode terminal mentioned in step S202 At least the current network in which the access network element is located and the first WLAN network are accessed; Step S204, when the access network element determines, according to the connection information, that the current network can perform joint transmission with the first WLAN network, the access network element Part or all of the transmission data of the multimode terminal is offloaded to the first WLAN network. In the embodiment of the present invention, the access network element receives the connection information of the multimode terminal in the first WLAN network, where the multimode terminal can access at least the current network where the access network element is located and the first WLAN network; When the access network element determines, according to the connection information, that the current network can perform joint transmission with the first WLAN network, the access network element divides part or all of the transmission data of the multimode terminal to the first WLAN network. In this example, the multimode terminal can still access the access network (for example, the 3GPP access network) and the WLAN access point through the existing process, and the offload function is only the 3GPP access network element and the WLAN connected on the network side. Data splitting between the ingress points does not involve terminal side modification, ensuring the compatibility of the WiFi terminal device, and there is no need to modify the existing WiFi protocol; the multimode terminal accesses the network through the same access network element, The access network itself is informed, ensuring the interoperability between the access side and the network side. The access point (AP) of the WLAN network can be directly integrated into the access network element or not integrated. Enter In the network element, but the network element of the access network is tightly coupled, the combination of the two is not limited in the embodiment of the present invention, and the access function of the network can be implemented. As shown in FIG. 2, step S204 refers to the access network element to split part or all of the transmission data of the multimode terminal to the first WLAN network during implementation. In the implementation process, the WLAN network that the multimode terminal can access may be There is more than one. If another WLAN network (for example, the second WLAN network) is found to be accessible at this time, the access network element receives the connection information of the multimode terminal in the second WLAN network, and the new connection information. Make a judgment. If the access network element determines that the current network can also perform joint transmission with the second WLAN network according to the connection information of the multimode terminal in the second WLAN network, the access network element stops the offloading of the first WLAN network. Part or all of the transmission data of the multimode terminal is offloaded to the second WLAN network. The first WLAN network and the second WLAN network here are only used to indicate the difference of multimode terminal access.

The WLAN network does not limit the WLAN network itself. The following is a detailed description of the data transmission using the first WLAN network as an example. The method is also applicable to the second WLAN network or other WLAN networks. The connection information provided in this example includes information on the network side and/or the terminal side. Specifically, the network side includes WLAN network information accessed by the multimode terminal, and the information on the terminal side includes terminal connection information of the multimode terminal itself. In this example, the WLAN network information is the authentication information of the WLAN network. Preferably, the WLAN network information may include at least one of the following:

Basic Service Set Identifier (BSSID) for WLAN networks

Service Set Identifier (SSID) of the WLAN network

Extended Service Set ID (ESSID) of the WLAN network Channel information of the WLAN network (Channel)

Media Access Control (MAC) address information of an access point of a WLAN network. In addition to the information on the network side, the connection information further includes terminal connection information for identifying the multimode terminal and the network side. Preferably, the terminal connection information includes: address information of the multimode terminal in the WLAN network (for example, MAC) Address or IP address) and/or Association ID (AID) established by the multimode terminal on the WLAN. As mentioned above, the access network element can determine whether the current network can perform joint transmission with the first WLAN network according to the connection information. The determining method herein may include, but is not limited to, the following manners: In the first mode, the WLAN network information in the connection information is the same as the WLAN network information corresponding to the WLAN access point function integrated by the access network element, and the multimode terminal in the connection information can be found in the first WLAN network. When the corresponding terminal connection information is used, the access network element determines that the current network can perform joint transmission with the first WLAN network; and the second mode, the WLAN network information in the connection information and the pre-configured network element of the access network are used for offloading.

When at least one of the WLAN network information is consistent, and the terminal connection information corresponding to the multimode terminal in the connection information can be found in the first WLAN network, the access network element determines that the current network can be implemented with the first WLAN network. Joint transmission. The determination here is not only applicable to the first WLAN network, but also to the second WLAN network or other WLAN networks. For example, when the connection information of the multimode terminal in the WLAN network is the BSSID, the BSSID is consistent with the BSSID corresponding to the WLAN access point function, and the address information or the AID information of the terminal is found in the WLAN network corresponding to the BSSID. Subsequent shunt operations are only possible when the connection information is available. In an embodiment, after the network element of the access network confirms that the offloading operation can be performed, the indication information is sent to the multimode terminal to indicate whether the multimode terminal performs joint transmission of the network where the UE is located and the first WLAN network. The indication information herein includes: WLAN network information and/or whether to perform a joint transmission indication. As shown in FIG. 2, in step S202, the access network element receives the connection information, and can receive the connection information reported by the multi-mode terminal through the existing air interface signaling; or the access network element can pass the new The added air interface message receives the connection information reported by the multimode terminal. In implementation, if it can be realized, it is also feasible to transmit the connection information through the non-air interface message. In any of the above preferred embodiments, the access network element includes a network element node of an access network of a 3GPP different radio access technology (RAT). Depending on the RAT, the type of the access network element is different. The following is a description of several common RATs. For example, the radio access network element refers to the Evolved Node B (eNB) in the LTE network; The radio access network element in the Universal Mobile Telecommunications System (UMTS) network refers to the Radio Network Controller (RNC) and the Base Station (Node B) (collectively referred to as the Radio Network Subsystem (RNS)). _; In the Global System for Mobile communication (GSM) network, the radio access network element refers to the Base Station Controller (BSC) and the Base Transceiver Station (BTS) (collectively called the Base Station System). , BSS)). In order to implement the foregoing method embodiments, based on the same inventive concept, the embodiment of the present invention further provides a data transmission device, which is configured in an access network element, and has a structure diagram as shown in FIG. 3, including: a receiving module 301, The receiving module is configured to receive the connection information of the multimode terminal in the first WLAN network, where the multimode terminal can access at least the current network where the access network element is located and the first WLAN network; and the offloading module 302 is configured to determine according to the connection information. When the current network can perform joint transmission with the first WLAN network, part or all of the transmission data of the multimode terminal is offloaded to the first WLAN network. In an embodiment, the receiving module 301 is further configured to receive the connection information of the multimode terminal in the second WLAN network; the offloading module 302 is further configured to determine, according to the connection information corresponding to the second WLAN network, that the current network can When the second WLAN network implements the joint transmission, the offloading of the first WLAN network is stopped, and part or all of the transmission data of the multimode terminal is offloaded to the second WLAN network. In order to make the data transmission method provided by the embodiment of the present invention clearer and more clear, it will be described in several specific embodiments. Embodiment 1 In this embodiment, the current network where the access network element is located is set to be a 3GPP network, and the example is described. In this example, the network element of the 3GPP access network receives the connection information of the multimode terminal reported by the multimode terminal in the WLAN network, and the network element of the 3GPP access network splits part or all of the transmission data of the multimode terminal to the WLAN network, thereby implementing multiple The modulo terminal simultaneously transmits data through the joint of the 3GPP network and the WLAN network. The network element of the 3GPP access network may be a network element of the 3GPP different RAT access network, such as a radio access network element, which refers to the eNB in the LTE network; in the UMTS network, the radio access network element refers to the RNC and the NodeB (collectively referred to as RNS) In the GSM network, the radio access network element refers to the BSC and the BTS (collectively referred to as BSS). The connection information of the multimode terminal in the WLAN network includes WLAN network information and/or terminal connection information accessed by the multimode terminal, where the WLAN network information includes at least one of the following:

BSSID of the WLAN network; SSID of the WLAN network;

ESSID of the WLAN network; Channel of the WLAN network; MAC address information of the access point of the WLAN network. The multimode terminal connection information includes at least one of the following: a MAC address information of the multimode terminal in the WLAN network; and an AID established by the multimode terminal in the WLAN network. Further, the connection information in this example may be transmitted by the multimode terminal to the 3GPP access network element through the existing air interface signaling, or may be delivered through the newly added air interface message. Optionally, the network element of the 3GPP access network may send indication information to the multimode terminal, to indicate whether the UE performs

The joint transmission of the 3GPP network and the WLAN network, the information may include WLAN network information, and/or whether a joint transmission indication is performed. Embodiment 2 In this example, the LTE access network element eNB integrates the WiFi access point function, and the UE is a multi-mode mobile phone supporting LTE and WLAN. For the specific process of the data transmission process, refer to FIG. 4 . Step S402: The UE is in a connected state in the LTE network, and establishes a connection bearer for data transmission with the eNB. Step S404: The UE discovers that the WLAN network (ie, the first WLAN network) exists by scanning, and establishes an association with the WLAN network to access the WLAN network through an existing process. Step S406: The UE sends the connection information of the WLAN network to the eNB by using an uplink message, for example, a measurement report message, where the message includes the BSSID of the WLAN network, and the established association identifier AID and the like. Step S408: After receiving the WLAN network information, the eNB determines that the WLAN network corresponding BSSID is the WLAN network BSSID integrated by the eNB base station, and the association corresponding to the AID is found on the WLAN access point. The network may implement joint transmission, and the eNB decides to offload some or all of the transmission data of the UE in the LTE network to the WLAN network. Step S410: The eNB uses an air interface message, such as a radio resource control connection reconfiguration message (RRC Connection Reconfiguration), where the message carries a joint transmission indication, and is used to instruct the UE to perform joint transmission between the LTE and the WLAN network. Step S412: The UE sends a RRC Connection Reconfiguration Complete message (RRC Connection Reconfiguration Complete) to the eNB. After receiving the eNB, the eNB starts to offload the data transmitted by the UE in the LTE network to the WLAN network for transmission, and implements the UE in the LTE and WLAN networks. Joint transmission. The step S410 and the step S412 are optional, that is, the eNB can directly perform the offloading, and then directly offload the data transmitted by the UE in the LTE network to the WLAN network for transmission, and implement joint transmission of the UE in the LTE and the WLAN network. . Embodiment 3 In this example, the network side includes a UMTS access network RNS and a WLAN network access point AP, and the UE is a multi-mode mobile phone supporting the UMTS network and the WLAN. For the specific process of the data transmission process, refer to FIG. 5. Step S502: The UE discovers the WLAN network (ie, the first WLAN network) by scanning, and completes access to the WLAN network through an existing process, and performs service data transmission. Step S504: The UE establishes a service connection in the resident UMTS network due to the upper layer service requirement,

The UE initiates connection establishment to the UMTS access network RNS through a normal RRC connection establishment procedure. Step S506: The UE sends the connection information of the WLAN network to the RNC by using an uplink message, such as an RRC Connection Setup Complete message or a measurement report, and the message includes the SSID of the WLAN network. The MAC address information of the access point in the WLAN network, and the associated association identifier AID and other information. In step S508, after receiving the RNC, the SSID and the MAC address information of the WLAN network determine that the WLAN network information is the same as the pre-configured shunt WLAN network configuration; and the AID corresponding association identifier is found in the WLAN network, so the RNC determines that the RN network can The WLAN network implements offloading. Step S510: The RNC sends the downlink transmission data of the UE in the LTE network to the access point of the WLAN network, and sends the data to the UE through the association corresponding to the AID. For the uplink data, the UE may send the information to the access point through the WLAN network, and then The AP is forwarded to the 3GPP access network element RNS and finally sent to the core network via the 3GPP network. The joint transmission of the UE in the UMTS network and the WLAN network is implemented in the foregoing manner. Preferably, in the step S510, the RNC may also use an air interface message, such as a radio resource control connection reconfiguration message (RRC Connection Reconfiguration), to instruct the UE to perform joint transmission of the two networks. Embodiment 4 In this example, the network side includes an LTE access network element eNB, and a plurality of WLAN access points. The UE is a multi-mode mobile phone supporting LTE and WLAN. For the specific process of the data transmission process, refer to FIG. 6. Step S602: The UE discovers the WLAN network by scanning, and completes access to the WLAN network through an existing process, and performs service data transmission. Step S604: The UE establishes a service connection in the camped LTE network due to the upper layer service requirement. Therefore, the UE accesses the LTE network through a normal radio resource control connection establishment process, and establishes a connection bearer. Step S606: The UE sends the connection information of the WLAN network to the eNB by using uplink signaling, such as an RRC connection reconfiguration complete message, a measurement report message, or a newly added uplink message, where the message includes the SSID1 of the WLAN network, and the UE is in the UE. The association identifier AID1 and the like established in the WLAN network are information. Step S608: After receiving the eNB, the eNB may find that the eNB cannot perform joint transmission with the WLAN network. For example, the eNB determines that the WLAN network corresponding to the SSID1 is different from the pre-configured WLAN network SSID. Step S610, the eNB uses an air interface message, such as a radio resource control connection reconfiguration message (RRC).

Connection Reconfiguration), the message carries WLAN network information that can be jointly transmitted with the eNB in real time, such as information such as the SSID of the WLAN network, channel information of the corresponding WLAN network, and the like. Step S612: After receiving the UE, the UE re-scans the WLAN network according to the indication. If the WLAN network with the same SSID indicated by the eNB (ie, the first WLAN network) is found, the UE re-accesses the new WLAN network to establish an association. Step S614: The UE sends the connection information of the WLAN network to the eNB by using uplink signaling, such as RRC Connection Reconfiguration Complete (RRC Connection Reconfiguration Complete), where the message includes the SSID2 of the WLAN network, and the established association. Identify information such as AID2. Step 616: After receiving the eNB, the eNB determines that the eNB can perform joint transmission with the WLAN network corresponding to the SSID2, and also finds that the wireless connection corresponding to the AID2 is found in the WLAN network, so the eNB determines to transmit the data of the UE in the LTE network. The UE is offloaded to the WLAN network corresponding to the SSID2, so that the UE simultaneously performs data transmission through the LTE network and the WLAN network. Embodiment 5 In this example, the access network element is a UMTS access network RNS, and a plurality of WLAN access points. The UE is a multi-mode mobile phone supporting the UMTS network and the WLAN. For the specific process of the data transmission process, refer to FIG. 7. Step S702: The UE implements joint transmission in the WLAN network corresponding to the RNS and the access point API, that is, part or all of the transmission data of the UE is offloaded by the RNS to the WLAN network for transmission. In step S704, the UE discovers the WLAN network corresponding to the new access point AP2 (ie, the second WLAN network) by scanning, and the UE sends the information of the new WLAN network to the uplink message, for example, the measurement report message or the newly added uplink message. The RNC, the message contains the BSSID2 of the new WLAN network. Step S706: After receiving the RNC, the RNC determines that the BSSID2 is consistent with the BSSID of the pre-configured WLAN network that can be offloaded, that is, the RNC can implement joint transmission of the WLAN network corresponding to the BSSID2, and the RNC determines to implement the offloading to the new WLAN network according to the algorithm. Therefore, the RNC stops the offloading to the API, and the downlink message, such as the RRC connection reconfiguration message, instructs the UE to cancel the connection with the original WLAN network, and re-accesses the WLAN network corresponding to the BSSID2. Step S708: After receiving the message, the UE disconnects from the original WLAN network and accesses the new WLAN network. Step S710: The UE reports the connection information of the WLAN network corresponding to the BSSID2 to the RNC by using an uplink message, such as an RRC connection reconfiguration complete message, including the BSSID2 of the new WLAN network, and the AID established by the UE in the new WLAN network. Or the MAC address of the UE, etc. Step S712: After receiving the RNC, the RNC re-sorts the transmission data of the UE to the AP2 corresponding to the new WLAN network, and jointly transmits the transmission data of the UE through the current UMTS and the WLAN network. 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 access network element receives the connection information of the multimode terminal in the first WLAN network, where the multimode terminal can at least Accessing the current network where the access network element is located and the first WLAN network; when the access network element determines that the current network can perform joint transmission with the first WLAN network according to the connection information, the access network element will be the multimode terminal Part or all of the transmitted data is offloaded to the first WLAN network. In this example, the multimode terminal can still access the access network (for example, the 3GPP access network) and the WLAN access point through the existing process, and the offload function is only the 3GPP access network element and the WLAN connected on the network side. Data splitting between the ingress points does not involve terminal side modification, ensuring the compatibility of the WiFi terminal device, and there is no need to modify the existing WiFi protocol; the multimode terminal accesses the network through the same access network element, The access network itself is informed, ensuring the interoperability between the access side and the network side. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

1. A method of data transmission, comprising:

The access network element receives the connection information of the multimode terminal in the first wireless local area network WLAN network, where the multimode terminal can access at least the current network where the access network element is located and the first WLAN network;

When the access network element determines that the current network can perform joint transmission with the first WLAN network according to the connection information, the access network element transmits data in part or all of the multimode terminal. Diverted to the first WLAN network.

The method according to claim 1, wherein, after the network element of the access network offloads part or all of the transmission data of the multimode terminal to the first WLAN network, the method further includes:

The access network element receives the connection information of the multimode terminal in the second WLAN network; and determines, by the access network element, the current network and the location according to the connection information corresponding to the second WLAN network When the second WLAN network implements the joint transmission, the access network element stops the offloading of the first WLAN network, and the part or all of the transmission data of the multimode terminal is offloaded to the second WLAN network.

The method according to claim 1, wherein the connection information comprises: WLAN network information accessed by the multimode terminal and/or terminal connection information of the multimode terminal itself.

The method according to claim 3, wherein the WLAN network information comprises at least one of the following: a basic service set identifier BSSID of the WLAN;

The service set identifier SSID of the WLAN;

The extended service set identifier ESSID of the WLAN;

Channel information of the WLAN;

The media access control MAC address of the access point of the WLAN network.

5. The method of claim 3, wherein the multimode terminal connection information comprises at least one of the following:

The address information of the multimode terminal in the WLAN network, where the address information includes a media access control MAC address or an internet protocol IP address;

The association identifier AID established by the multimode terminal in the WLAN. The method according to any one of claims 1 to 5, wherein the access network element determines, according to the connection information, that the current network can perform joint transmission with the first WLAN network, including: the connection The WLAN network information in the information is the same as the WLAN network information corresponding to the WLAN access point function integrated by the access network element, and the multi-mode terminal in the connection information can be found in the first WLAN network. When the corresponding terminal connection information, the access network element determines that the current network can perform joint transmission with the first WLAN network; or

The WLAN network information in the connection information is consistent with at least one of the pre-configured WLAN network information for offloading of the access network element, and the connection can be found in the first WLAN network. When the terminal connection information corresponding to the multimode terminal in the information, the access network element determines that the current network can perform joint transmission with the first WLAN network. The method according to claim 3, wherein after the access network element receives the connection information, before distributing part or all of the transmission data of the multimode terminal to the first WLAN network, including The access network element sends the indication information to the multi-mode terminal, and indicates whether the multi-mode terminal performs joint transmission between the network where the multi-mode terminal is located and the first WLAN network, where the indication information includes: the WLAN Network information and/or whether to perform a joint transmission indication. The method according to any one of claims 1 to 5, wherein the access network element receives the connection information, including: the access network element receives the The connection information reported by the multimode terminal; or

The access network element receives the connection information reported by the multimode terminal by using a newly added air interface message. The method according to any one of claims 1 to 5, wherein the access network element comprises a network element node of an access network of a third generation partnership plan 3GPP different radio access technology RAT. The method according to claim 9, wherein the access network element includes any one of the following:

Long Term Evolution System (LTE) evolved base station eNB in an LTE network;

a radio network subsystem RNS in a universal mobile communication system UMTS network, wherein the RNS comprises a radio network controller RNC and a base station NodeB; A base station system BSS in a global mobile communication system GSM network, wherein the BSS comprises a base station controller BSC and a base station BTS.

A data transmission device, which is disposed in an access network element, and includes:

a receiving module, configured to receive connection information of the multimode terminal in the first wireless local area network WLAN network, where the multimode terminal can access at least the current network where the access network element is located and the first WLAN network; The offloading module is configured to, when determining, according to the connection information, that the current network can perform joint transmission with the first WLAN network, offload part or all of the transmission data of the multimode terminal to the first WLAN network.

12. The device according to claim 11, wherein

The receiving module is further configured to receive connection information of the multimode terminal in the second WLAN network;

The offloading module is further configured to: when determining that the current network can perform joint transmission with the second WLAN network according to the connection information corresponding to the second WLAN network, stopping offloading the first WLAN network, Part or all of the transmission data of the multimode terminal is offloaded to the second WLAN network.