WO2017036248A1 - 一种数据传输方法、装置及系统 - Google Patents

一种数据传输方法、装置及系统 Download PDF

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Publication number
WO2017036248A1
WO2017036248A1 PCT/CN2016/088940 CN2016088940W WO2017036248A1 WO 2017036248 A1 WO2017036248 A1 WO 2017036248A1 CN 2016088940 W CN2016088940 W CN 2016088940W WO 2017036248 A1 WO2017036248 A1 WO 2017036248A1
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address
epc
local service
gtpu
data
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PCT/CN2016/088940
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English (en)
French (fr)
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习建德
段江海
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大唐移动通信设备有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/16Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/08Load balancing or load distribution

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data transmission method, apparatus, and system.
  • LTE Long Term Evolution
  • 5G Long Term Evolution
  • UE User Equipment
  • LIPA Local IP Access
  • eNB evolved NodeB
  • L-GW local gateway
  • HSS Local Subscriber Server
  • APN Access Point Name
  • MME Mobility Management Entity
  • An embodiment of the present invention provides a data transmission method, apparatus, and system for offloading local service data between a UE and an EPC to an access network side when there is local service data between the UE and the EPC.
  • the local service server processes the specific APNs in the HSS and does not require the core network to process local service data. This avoids service jitter, improves service performance, and optimizes the overall system architecture and performance.
  • the local service data between the user equipment UE and the EPC is offloaded to the local service server set on the access network side.
  • the S1 interface data between the evolved base station eNB and the Evolved Packet Core Network (EPC) is monitored by the method.
  • EPC Evolved Packet Core Network
  • the local service data between the UE and the EPC is offloaded to the setting.
  • the local service server on the access network performs processing, so that no special APN is configured in the HSS, and the core network is not required to process local service data, thereby avoiding service jitter, improving service performance, and optimizing the overall system architecture and performance.
  • the method further includes:
  • the method further includes:
  • the S1 interface signaling between the eNB and the Evolved Packet Core Network (EPC) is monitored, and the IP address of the S1 interface service plane and the GTPU tunnel information of the General Packet Radio Service Tunneling Protocol user plane are obtained from the intercepted S1 interface signaling.
  • the corresponding bearer of the data network PDN is connected, and the correspondence between the UE IP address, the local service server IP address, and the GTPU tunnel header information is established through the GTPU tunnel information.
  • the local service data between the user equipment UE and the EPC is offloaded to the local service server that is set on the access network side, and specifically includes:
  • the GTPU uplink data packet between the UE and the EPC is the IP address of the local service server
  • the GTPU uplink data packet is removed from the GTPU tunnel header according to the correspondence between the local service server IP address and the GTPU tunnel header information. Sent to the local service server.
  • the local service data between the user equipment UE and the EPC is offloaded to the local service server that is set on the access network side, and specifically includes:
  • the GTPU uplink data packet between the UE and the EPC is not the IP address of the local service server, the GTPU uplink data packet is transparently forwarded to the EPC.
  • the local service data between the user equipment UE and the EPC is offloaded to the local service server that is set on the access network side, and specifically includes:
  • the source address of the IP data packet of the downlink data packet between the UE and the EPC is the IP address of the local service server, and the target address is the UE IP address, according to the correspondence between the UE IP address and the GTPU tunnel header information
  • the downlink data packet is added to the GTPU tunnel header corresponding to the UE IP address, and then sent to the eNB corresponding to the UE.
  • the local service data between the user equipment UE and the EPC is offloaded to the local service server that is set on the access network side, and specifically includes:
  • the GTPU uplink data packet is transparently forwarded to the eNB corresponding to the UE.
  • the local service data between the user equipment UE and the EPC is offloaded to the local service server that is set on the access network side, and specifically includes:
  • the GTPU and/or flow control transport protocol SCTP downlink data packets from the EPC are transparently forwarded to the eNB.
  • a first unit configured to monitor S1 interface data between the evolved base station eNB and the evolved packet core network EPC;
  • the second unit is configured to: when local service data between the user equipment UE and the EPC exists, offload local service data between the UE and the EPC to a local service server that is set on the access network side.
  • the first unit is further configured to: before listening to the S1 interface data between the evolved base station eNB and the evolved packet core network EPC:
  • the first unit is further configured to:
  • the S1 interface signaling between the eNB and the Evolved Packet Core Network (EPC) is monitored, and the IP address of the S1 interface service plane and the GTPU tunnel information of the General Packet Radio Service Tunneling Protocol user plane are obtained from the intercepted S1 interface signaling.
  • the corresponding bearer of the data network PDN is connected, and the correspondence between the UE IP address, the local service server IP address, and the GTPU tunnel header information is established through the GTPU tunnel information.
  • the second unit is specifically configured to:
  • the GTPU uplink data packet between the UE and the EPC is the IP address of the local service server
  • the GTPU uplink data packet is removed from the GTPU tunnel header according to the correspondence between the local service server IP address and the GTPU tunnel header information. Sent to the local service server.
  • the second unit is specifically configured to: if the destination address of the GTPU uplink data packet between the UE and the EPC is not the IP address of the local service server, transparently forward the GTPU uplink data packet to the EPC.
  • the second unit is specifically configured to:
  • the source address of the IP data packet of the downlink data packet between the UE and the EPC is the local service server
  • the IP address and the target address are the UE IP addresses
  • the GTPU tunnel header corresponding to the UE IP address is added to the downlink data packet according to the corresponding relationship between the UE IP address and the GTPU tunnel header information, and then sent to the eNB corresponding to the UE.
  • the second unit is specifically configured to:
  • the GTPU uplink data packet is transparently forwarded to the eNB corresponding to the UE.
  • the second unit is specifically configured to:
  • the GTPU and/or flow control transport protocol SCTP downlink data packets from the EPC are transparently forwarded to the eNB.
  • the communication system provided by the embodiment of the present invention includes an access network device and a core network device, and the data transmission provided by the embodiment of the present invention is further included between the access network device and the core network device.
  • FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of processing an internal module of a offload server according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart diagram of a data transmission method according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention.
  • An embodiment of the present invention provides a data transmission method, apparatus, and system for offloading local service data between a UE and an EPC to an access network side when there is local service data between the UE and the EPC.
  • the local service server processes the specific APNs in the HSS, and does not require the core network to process local service data, avoids service jitter, improves service performance, and optimizes the overall system architecture and performance.
  • a communication system includes: an access network device and a core network device, and a data transmission device disposed between the access network device and the core network device, that is, a TOF offload.
  • the server that is, the embodiment of the present invention proposes to deploy a split server on the S1 interface of the eNB and the Evolved Packet Core (EPC), that is, the TOF offload server, and the existing PDN between the UE and the EPC.
  • EPC Evolved Packet Core
  • the connection not only carries the remote service but also carries the local service, and the local service is offloaded to the local service server set on the access network side through the TOF offload server. Therefore, there is no need to configure a dedicated APN in the HSS or core network processing. No impact on the original network architecture and configuration.
  • the Traffic Offload Function (TOF) offloading server implements a local offload function and is connected in series on the S1 interface between the eNB and the EPC.
  • the specific operations performed by the offload server are as follows:
  • Step 1 Configure the local service profile information for the TOF offload server through the operation and maintenance (OM), including the source IP address, the destination IP address, and the source port number, the target port number, and the protocol identifier.
  • OM operation and maintenance
  • Step 2 The UE installs and opens an application (Application, APP), and initiates a domain name system (DNS) resolution process, that is, sends a DNS resolution request message to the eNB, requesting to obtain an IP address of the local service server;
  • DNS domain name system
  • the DNS resolution request message is forwarded to the TOF offload server, and the TOF offload server receives the DNS resolution request message.
  • Step 3 The TOF offloading server supports the DNS domain name hijacking function, that is, hijacking the user's DNS resolution request packet, parsing the domain name field in the DNS resolution request packet, and querying the domain name field and the local service server from the database of the DNS server.
  • the IP address corresponding to the IP address of the local service server is obtained, and the local service server IP address is returned to the UE.
  • the detailed analysis of the DNS in the DNS resolution request packet belongs to the prior art, and details are not described herein again.
  • Step 4 The TOF offloading server listens to the signaling and service plane data of the S1 interface, and obtains the IP address of the service plane of the S1 interface from the S1 interface signaling (the IP address includes the address of the eNB and the SGW address of the serving gateway.
  • the S1 interface tunnel is composed of the IP address and the tunnel identifier at both ends of the tunnel. It is combined with the General Packet Radio Service (GPRS) Tunneling Protocol User Plane (GTPU) tunnel information for the packet data network.
  • GPRS General Packet Radio Service
  • GTPU General Packet Radio Service
  • the Packet Data Network (PDN) connects to the corresponding default bearer, and automatically learns the correspondence between the UE IP address, the local service server IP address, and the GTPU tunnel header information through the GTPU tunnel information.
  • PDN Packet Data Network
  • Step 5 If the destination address of the GTPU uplink data packet (from the UE to the network direction) is the address of the local service server, the TOF offload server does not send the GTPU uplink data packet to the EPC, but according to the local service server IP. The correspondence between the address and the GTPU tunnel header information is removed from the GTPU tunnel header and sent to the local service server.
  • the TOF offloading server forwards the data packet of the GTPU uplink data packet to the non-local service server, and transparently forwards the data packet to the EPC;
  • the source address of the IP packet of the downlink data packet (from the local service server to the UE direction) is the local service server, and the target address is the UE IP address, and the TOF offload server pairs these IP data packets according to the UE IP address and the GTPU tunnel header.
  • the corresponding relationship of the information is added to the GTPU tunnel header corresponding to the UE IP address, and then sent to the eNB where the UE is located. The purpose of this is to not affect the implementation of the original GTPU tunnel of the eNB.
  • the TOF offload server transparently forwards the GTPU and Stream Control Transmission Protocol (SCTP) downlink data packets from the core network to the eNB.
  • SCTP Stream Control Transmission Protocol
  • the traffic distribution server includes a control module, a service flow template configuration library, and an operation and maintenance (OM) module.
  • the specific operations of each module are as follows:
  • Step 1 When the bottom layer of the TOF offload server receives the IP data packet, if the data packet is an SCTP-encapsulated data packet, and the IP header contains a configuration target address that is an eNB IP address or an MME IP address, the IP packet content portion is parsed. , that is, the S1AP protocol packet.
  • the S-TMSI identifier and the TAI identifier are obtained from the S1AP message: Initial UE Message.
  • the SGW IP address and the GTPU tunnel ID in the uplink direction are obtained from the Transport Layer Address field and the GTP-TEID field in the S1AP message: Initial Context Setup Request message.
  • the eNB IP address and the GTPU tunnel ID in the downlink direction are obtained from the Transport Layer Address field and the GTP-TEID field in the S1AP message. If the data packet is a DNS message, and the domain name string of the field part of the DNS message is the configured local domain name string field, the data packet is intercepted, forwarded to the local DNS server, and after being resolved by the DNS server, the DNS server database is queried. Obtain the local service server IP address and return a DNS response message to the UE.
  • the Initial UE Message message is shown in the following Table 1:
  • This information is sent by the eNB to transmit the initial layer 3 information to the MME through the S1 interface. (This message is sent by the eNB to transfer the initial layer 3message to the MME over the S1 interface.)
  • the Initial Context Setup Request message is as shown in Table 2 below:
  • This message is sent by the MME to request the establishment of the UE context. (This message is sent by the MME to request the setup of a UE context.)
  • the Initial Context Setup Response message is as shown in Table 3 below:
  • This information is sent by the eNB to determine the established UE context (This message is sent by the eNB to confirm the setup of a UE context.)
  • Step 2 The S1AP module obtains the temporary identifier S-TMSI, the TAI information, the eNB IP address and the GTPU tunnel identifier of the GTPU tunnel in the downlink direction, and the SGW IP address and the GTPU tunnel identifier of the GTPU tunnel in the uplink direction, and then reports the control to the SGT. Module.
  • the control module assigns its information to the GTPU parsing module, and the GTPU parsing module parses the received GTPU data packet based on this information.
  • the source IP address and the destination IP address in the IP header are parsed from the IP data packet transmitted by the GTPU tunnel, that is, the inner layer IP packet.
  • the upstream and downstream directions are determined according to the source IP address and the destination IP address of the outer layer of the GTPU tunnel header.
  • the destination IP address of the outer IP header is the uplink packet, and the destination IP address of the outer IP header is the eNB IP.
  • the address is the downstream packet.
  • Upward direction The data packet is based on the destination address of the local service server IP address and the GTPU tunnel header. If the destination address of the IP packet is the local service server IP address, the GTPU tunnel header is removed and the IP packet is forwarded to the local service server. If the destination address of the upstream packet is not the local service server, the GTPU tunnel header is not modified and forwarded to the target SGW.
  • the destination address is the UE IP address and the source address is the local service server IP address
  • add a GTPU tunnel to the IP packet. Header it is encapsulated and forwarded to the eNB. If the target address is the UE IP address and the source IP address is not the local service server IP address, no modification is made and it is forwarded to the target eNB.
  • Step 3 For the data packet from the configured network management IP address, the distribution module forwards it to the OM module.
  • These data packets contain the IP address of the local service server, DNS domain name string information, and the IP address of the specific auxiliary service, such as the secondary location server IP address.
  • Step 4 The distribution module is only mirroring the S1AP message, that is, the distribution module has the capability of identifying the S1AP message, and the S1AP module only parses the message, and does not need to process the message before issuing.
  • Step 5 In order to prevent the memory overflow problem, the S1AP parsing module needs to parse the S1AP message: the UE context release request (UE Context Release Request) message, the path switch request or the response (Path Switch Request/Response) message, after receiving the message.
  • the report is reported to the control module, and the control module can delete the original correspondence of the GTPU module according to the information to ensure the robustness of the software.
  • a data transmission method provided by an embodiment of the present invention includes:
  • Monitor S1 interface data between the evolved base station eNB and the evolved packet core network EPC.
  • the S1 interface data between the evolved base station eNB and the Evolved Packet Core Network (EPC) is monitored by the method.
  • EPC Evolved Packet Core Network
  • the local service data between the UE and the EPC is offloaded to the setting.
  • the local service server on the access network side does not need to configure a dedicated APN in the HSS, and does not need the core network to process local service data, avoids service jitter, improves service performance, and optimizes the overall system architecture and performance.
  • the method further includes:
  • the method further includes:
  • the S1 interface signaling between the eNB and the Evolved Packet Core Network (EPC) is monitored, and the IP address of the S1 interface service plane and the GTPU tunnel information of the General Packet Radio Service Tunneling Protocol user plane are obtained from the intercepted S1 interface signaling.
  • the corresponding bearer of the data network PDN is connected, and the correspondence between the UE IP address, the local service server IP address, and the GTPU tunnel header information is established through the GTPU tunnel information.
  • the local service data between the user equipment UE and the EPC is offloaded to the local service server that is set on the access network side, and specifically includes:
  • the GTPU uplink data packet between the UE and the EPC is the IP address of the local service server
  • the GTPU uplink data packet is removed from the GTPU tunnel header according to the correspondence between the local service server IP address and the GTPU tunnel header information. Sent to the local service server.
  • the local service data between the user equipment UE and the EPC is offloaded to the local service server that is set on the access network side, and specifically includes:
  • the GTPU uplink data packet between the UE and the EPC is not the IP address of the local service server, the GTPU uplink data packet is transparently forwarded to the EPC.
  • the local service data between the user equipment UE and the EPC is offloaded to the local service server that is set on the access network side, and specifically includes:
  • the source address of the IP data packet of the downlink data packet between the UE and the EPC is the IP address of the local service server, and the target address is the UE IP address, according to the correspondence between the UE IP address and the GTPU tunnel header information
  • the downlink data packet is added to the GTPU tunnel header corresponding to the UE IP address, and then sent to the eNB corresponding to the UE.
  • the local service data between the user equipment UE and the EPC is offloaded to the local service server that is set on the access network side, and specifically includes:
  • the GTPU and/or flow control transport protocol SCTP downlink data packets from the EPC are transparently forwarded to the eNB.
  • a data transmission apparatus includes:
  • the first unit 11 is configured to monitor S1 interface data between the evolved base station eNB and the evolved packet core network EPC;
  • the second unit 12 is configured to offload local service data between the UE and the EPC to a local service server disposed on the access network side when there is local service data between the user equipment UE and the EPC.
  • the first unit is further configured to: before listening to the S1 interface data between the evolved base station eNB and the evolved packet core network EPC:
  • the first unit listens to the evolved type after returning the IP address of the local service server to the UE.
  • the S1 interface data between the base station eNB and the evolved packet core network EPC it is also used to:
  • the S1 interface signaling between the eNB and the Evolved Packet Core Network (EPC) is monitored, and the IP address of the S1 interface service plane and the GTPU tunnel information of the General Packet Radio Service Tunneling Protocol user plane are obtained from the intercepted S1 interface signaling.
  • the corresponding bearer of the data network PDN is connected, and the correspondence between the UE IP address, the local service server IP address, and the GTPU tunnel header information is established through the GTPU tunnel information.
  • the second unit is specifically configured to:
  • the GTPU uplink data packet between the UE and the EPC is the IP address of the local service server
  • the GTPU uplink data packet is removed from the GTPU tunnel header according to the correspondence between the local service server IP address and the GTPU tunnel header information. Sent to the local service server.
  • the second unit is specifically configured to: if the destination address of the GTPU uplink data packet between the UE and the EPC is not the IP address of the local service server, transparently forward the GTPU uplink data packet to the EPC.
  • the second unit is specifically configured to:
  • the source address of the IP data packet of the downlink data packet between the UE and the EPC is the IP address of the local service server, and the target address is the UE IP address, according to the correspondence between the UE IP address and the GTPU tunnel header information
  • the downlink data packet is added to the GTPU tunnel header corresponding to the UE IP address, and then sent to the eNB corresponding to the UE.
  • the second unit is specifically configured to:
  • the GTPU and/or flow control protocol SCTP downlink data packets from the EPC are transparently forwarded to the eNB.
  • the above first unit and second unit can be understood as specific refinement of the other specified IP address resolution shunt module described in FIG. 2.
  • Each of the foregoing units may be implemented by a physical device such as a processor, and the data transmission device may be the above-mentioned distribution server, and the division manner of the modules or units in the data transmission device is not limited to the division manner provided by the embodiment of the present invention. There may be many ways of dividing, and the embodiment of the present invention is not specifically limited.
  • the technical solution provided by the embodiment of the present invention is simple and practical, has little impact on the original network architecture, and can improve the service experience of the user, and does not need to configure a dedicated APN in the HSS, and does not require core network sensing.
  • the local service data between the UE and the EPC is offloaded to the local service server set on the access network side, so that there is no need to configure a dedicated APN or an core in the HSS.
  • the network processes local business data, avoids business jitter, improves business performance, and optimizes overall system architecture and performance.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention may employ one or more computers having computer usable program code embodied therein. The form of a computer program product embodied on a storage medium, including but not limited to disk storage and optical storage.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Abstract

本发明公开了一种数据传输方法、装置及系统,用以当存在UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器,从而不需要在HSS配置专门的APN,也不需要核心网处理本地业务数据,避免业务抖动,提高业务效果,优化整个系统架构和性能。本发明提供的一种数据传输方法包括:监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据;当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器。

Description

一种数据传输方法、装置及系统
本申请要求在2015年8月31日提交中国专利局、申请号为201510549520.2、发明名称为“一种数据传输方法、装置及系统”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域,尤其涉及一种数据传输方法、装置及系统。
背景技术
现在长期演进(Long Term Evolution,LTE)中,甚至5G中数据速率越来越高,业务种类越来越多。当前移动网络中业务应用服务器都是位于分组数据网(Packet Data Network,PDN)网络之后,距离用户设备(User Equipment,UE)路程长,业务抖动大,影响UE的业务体验。
现在有一种趋势建议靠近接入网部署业务缓冲器之类的设备,以减弱空口抖动对用户感知的影响。目前成熟的方法是本地IP接入(Local IP Access,LIPA),即在本地部署一个本地网关,在演进型基站(evolved NodeB,eNB)与本地网关(L-GW)之间建立一条PDN连接,这条PDN连接专门服务于本地业务。
但是,这个技术主要缺点是需要在归属用户服务器(Home Subscriber Server,HSS)专门设置一个用于本地的接入点名(Access Point Name,APN),以示与远端演进的分组核心网(Evolved Packet Core,EPC)的APN区别,该本地APN对应的PDN连接的建立、修改、删除都是由核心网移动性管理实体(Mobility Management Entity,MME)来控制。并且需要在HSS上用户签约,否则不能建立。如果接入网与核心网不属于一家设备厂家,对接、配置、测试处理都比较复杂。
发明内容
本发明实施例提供了一种数据传输方法、装置及系统,用以当存在UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器进行处理,从而不需要在HSS配置专门的APN,也不需要核心网处理本地业务数据,这样能够避免业务抖动,提高业务效果,优化整个系统架构和性能。
本发明实施例提供的一种数据传输方法,包括:
监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据;
当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器。
通过该方法,监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据;当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器进行处理,从而不需要在HSS配置专门的APN,也不需要核心网处理本地业务数据,避免了业务抖动,提高了业务效果,优化了整个系统架构和性能。
较佳地,所述监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据之前,该方法还包括:
接收UE发送的域名系统DNS解析请求报文,对该DNS解析请求报文中携带的域名字段进行解析,从DNS服务器的数据库中查询该域名字段与本地业务服务器IP地址对应关系,获取所述本地业务服务器的IP地址,并向该UE返回该本地业务服务器的IP地址。
较佳地,所述向该UE返回该本地业务服务器的IP地址之后,监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据之前,该方法还包括:
监听所述eNB与演进分组核心网EPC之间的S1接口信令,从监听到的S1接口信令中获取S1接口业务面的IP地址与通用分组无线业务隧道协议用户面GTPU隧道信息,针对分组数据网PDN连接对应的默认承载,通过GTPU隧道信息,建立UE IP地址、本地业务服务器IP地址和GTPU隧道头信息的对应关系。
较佳地,所述当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器,具体包括:
若存在UE与EPC之间的GTPU上行数据包的目的地址是本地业务服务器的IP地址,则根据本地业务服务器IP地址与GTPU隧道头信息对应关系,将该GTPU上行数据包去掉GTPU隧道头后,发送给所述本地业务服务器。
较佳地,所述当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器,具体包括:
若存在UE与EPC之间的GTPU上行数据包的目的地址不是所述本地业务服务器的IP地址,则将该GTPU上行数据包透明转发到所述EPC。
较佳地,所述当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器,具体包括:
若存在UE与EPC之间的下行数据包的IP数据包的源地址是所述本地业务服务器的IP地址,目标地址是UE IP地址,则根据UE IP地址与GTPU隧道头信息的对应关系,对 该下行数据包增加UE IP地址对应的GTPU隧道头后,发送给该UE所对应的eNB。
较佳地,所述当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器,具体包括:
若存在UE与EPC之间的GTPU下行数据包的目的地址不是所述本地业务服务器的IP地址,而是UE IP地址,则将该GTPU上行数据包透明转发到该UE所对应的eNB。
较佳地,所述当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器,具体包括:
对来自所述EPC的GTPU和/或流控制传输协议SCTP下行数据包,透明转发到eNB。
本发明实施例提供的一种数据传输装置,包括:
第一单元,用于监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据;
第二单元,用于当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器。
较佳地,所述第一单元在监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据之前,还用于:
接收UE发送的域名系统DNS解析请求报文,对该DNS解析请求报文中携带的域名字段进行解析,从DNS服务器的数据库中查询该域名字段与本地业务服务器IP地址对应关系,获取所述本地业务服务器的IP地址,并向该UE返回该本地业务服务器的IP地址。
较佳地,所述第一单元在向该UE返回该本地业务服务器的IP地址之后,监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据之前,还用于:
监听所述eNB与演进分组核心网EPC之间的S1接口信令,从监听到的S1接口信令中获取S1接口业务面的IP地址与通用分组无线业务隧道协议用户面GTPU隧道信息,针对分组数据网PDN连接对应的默认承载,通过GTPU隧道信息,建立UE IP地址、本地业务服务器IP地址和GTPU隧道头信息的对应关系。
较佳地,所述第二单元具体用于:
若存在UE与EPC之间的GTPU上行数据包的目的地址是本地业务服务器的IP地址,则根据本地业务服务器IP地址与GTPU隧道头信息对应关系,将该GTPU上行数据包去掉GTPU隧道头后,发送给所述本地业务服务器。
较佳地,所述第二单元具体用于:若存在UE与EPC之间的GTPU上行数据包的目的地址不是所述本地业务服务器的IP地址,则将该GTPU上行数据包透明转发到所述EPC。
较佳地,所述第二单元具体用于:
若存在UE与EPC之间的下行数据包的IP数据包的源地址是所述本地业务服务器的 IP地址,目标地址是UE IP地址,则根据UE IP地址与GTPU隧道头信息的对应关系,对该下行数据包增加UE IP地址对应的GTPU隧道头后,发送给该UE所对应的eNB。
所述第二单元具体用于:
若存在UE与EPC之间的GTPU下行数据包的目的地址不是所述本地业务服务器的IP地址,而是UE IP地址,则将该GTPU上行数据包透明转发到该UE所对应的eNB。
较佳地,所述第二单元具体用于:
对来自所述EPC的GTPU和/或流控制传输协议SCTP下行数据包,透明转发到eNB。
本发明实施例提供的一种通信系统,包括接入网设备和核心网设备,在所述接入网设备和所述核心网设备之间,还包括本发明实施例提供的所述的数据传输装置,以及与该装置连接的本地业务服务器。
附图说明
图1为本发明实施例提供的一种通信系统架构示意图;
图2为本发明实施例提供的一种分流服务器内部模块处理流程示意图;
图3为本发明实施例提供的一种数据传输方法的流程示意图;
图4为本发明实施例提供的一种数据传输装置的结构示意图。
具体实施方式
本发明实施例提供了一种数据传输方法、装置及系统,用以当存在UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器进行处理,从而不需要在HSS配置专门的APN,也不需要核心网处理本地业务数据,避免业务抖动,提高业务效果,优化整个系统架构和性能。
参见图1,本发明实施例提供的一种通信系统包括:接入网设备和核心网设备,以及在所述接入网设备和所述核心网设备之间设置的数据传输装置,即TOF分流服务器,也就是说,本发明实施例提出在eNB与演进的分组核心网(Evolved Packet Core,EPC)的S1接口上部署一台分流服务器,即TOF分流服务器,UE与EPC之间已有的PDN连接不仅承载远端业务,还承载本地业务,通过该TOF分流服务器实现将本地业务分流到设置在接入网侧的本地业务服务器。因此,这样不需要在HSS配置专门的APN,也不需要核心网处理。对原有网络架构与配置没有影响。
业务卸载功能实体(Traffic Offload Function,TOF)分流服务器实现本地分流功能,串接在eNB与EPC之间的S1接口上。该分流服务器具体执行的操作如下:
步骤一:通过操作维护(OM)为TOF分流服务器配置本地业务模板信息,包括源IP地址、目标IP地址,以及源侧端口号、目标侧端口号、协议标识等信息。
步骤二:UE安装并打开应用(Application,APP),会发起域名系统(Domain Name System,DNS)解析过程,即发送DNS解析请求报文给eNB,请求获取本地业务服务器的IP地址;eNB将该DNS解析请求报文转发给TOF分流服务器,TOF分流服务器接收该DNS解析请求报文。
步骤三:TOF分流服务器支持DNS域名劫持功能,即劫持用户的DNS解析请求报文,对该DNS解析请求报文中的域名字段进行解析,从DNS服务器的数据库中查询该域名字段与本地业务服务器IP地址对应关系,获取所述本地业务服务器的IP地址,并向UE返回该本地业务服务器IP地址。其中,具体如何对该DNS解析请求报文中的DNS进行解析属于现有技术,在此不再赘述。
步骤四:TOF分流服务器监听S1接口的信令和业务面数据,从S1接口信令中获取S1接口业务面的IP地址(该IP地址包括eNB的地址和服务网关SGW地址,需要说明的是,S1接口隧道是由隧道两端的IP地址和隧道标识组成的)与通用分组无线业务(General Packet Radio Service,GPRS)隧道协议用户面(GPRS Tunneling Protocol User Plane,GTPU)隧道信息,针对分组数据网(Packet Data Network,PDN)连接对应的默认承载,通过GTPU隧道信息自动学习建立UE IP地址、本地业务服务器IP地址和GTPU隧道头信息的对应关系。
步骤五:若GTPU上行数据包(从UE到网络方向)的目的地址是本地业务服务器的地址,则TOF分流服务器对这些GTPU上行数据包,不再发送给EPC,而是则根据本地业务服务器IP地址与GTPU隧道头信息的对应关系,去掉GTPU隧道头后,发送给本地业务服务器。
TOF分流服务器对GTPU上行数据包的目的地址非本地业务服务器的数据包,透明转发到EPC;
下行数据包(从本地业务服务器到UE方向)的IP数据包的源地址是本地业务服务器,目标地址是UE IP地址,则TOF分流服务器对这些IP数据包,则根据UE IP地址与GTPU隧道头信息的对应关系增加UE IP地址对应的GTPU隧道头后,发送给UE所在的eNB;这样做的目的是不影响eNB原有GTPU隧道的实现。
TOF分流服务器对来自核心网的GTPU、流控制协议(Stream Control Transmission Protocol,SCTP)下行数据包,透明转发到eNB。
参见图2,该分流服务器包括控制模块、业务流模板配置库、操作维护(OM)模块、 S1AP解析模块、GTPU解析模块、其他指定IP地址解析分流模块、分发模块,各模块具体执行的操作如下:
步骤一.当TOF分流服务器底层接收到IP数据包时,如果数据包是SCTP封装的数据包,IP头中包含有所配置目标地址是eNB IP地址或MME IP地址,则解析其IP包内容部分,即S1AP协议数据包。例如从S1AP消息:初始UE信息(Initial UE Message)消息中获取到S-TMSI标识、TAI标识。从S1AP消息:初始上下文建立请求(Initial Context Setup Request)消息中的传输层地址(Transport Layer Address)字段和GTP-TEID字段获取SGW IP地址和上行方向的GTPU隧道ID。从S1AP消息中Transport Layer Address字段和GTP-TEID字段获取eNB IP地址和下行方向的GTPU隧道ID。如果数据包为DNS消息,并且DNS消息中字段部分的域名字符串为所配置的本地域名字符串字段,则截留该数据包,转发给本地DNS服务器,由DNS服务器解析后,查询DNS服务器数据库后获取本地业务服务器IP地址,返回DNS响应消息给UE。
其中,Initial UE Message消息如下表一所示:
这个信息是由eNB发送的,用于通过S1接口传输初始层3信息给MME(This message is sent by the eNB to transfer the initial layer 3message to the MME over the S1interface.)
传输方向(Direction):eNB→MME
表一
Figure PCTCN2016088940-appb-000001
其中,所述Initial Context Setup Request消息如下表二所示:
这个信息是由MME发送的,用于请求建立UE上下文(This message is sent by the MME to request the setup of a UE context.)
Direction:MME→eNB
表二
Figure PCTCN2016088940-appb-000002
其中,所述的Initial Context Setup Response消息如下表三所示:
这个信息是由eNB发送的,用于确定已建立UE上下文(This message is sent by the  eNB to confirm the setup of a UE context.)
Direction:eNB→MME
表三
Figure PCTCN2016088940-appb-000003
步骤二.S1AP模块获取到用户的临时标识S-TMSI、TAI信息、属于下行方向GTPU隧道的eNB IP地址和GTPU隧道标识、及上行方向GTPU隧道的SGW IP地址和GTPU隧道标识后,上报给控制模块。由控制模块将其信息指派给GTPU解析模块,GTPU解析模块根据此信息对所接收到的GTPU数据包进行解析。从GTPU隧道所传输的IP数据包中解析IP头中的源IP地址和目标IP地址,即内层IP包。上下行方向根据GTPU隧道头外层的源IP地址和目标IP地址判断上下行方向,外层IP头目标地址为SGW IP地址则为上行方向数据包,外层IP头的目标IP地址为eNB IP地址,则为下行数据包。对上行方向 的数据包,根据目标地址为本地业务服务器IP地址、GTPU隧道头对应关系,如果IP包的目标地址是本地业务服务器IP地址,则去掉GTPU隧道头,将IP包转发给本地业务服务器。如果上行方向的数据包的目标地址不是本地业务服务器,则不修改GTPU隧道头,将其转发给目标SGW。对于下行方向的数据包,根据本地业务服务器IP地址、UE IP地址、GTPU隧道标识三者对应关系,如果目标地址为UE IP地址、源地址为本地业务服务器IP地址,给该IP包添加GTPU隧道头,将其封装后转发给eNB。如果目标地址是UE IP地址、源IP地址不是本地业务服务器IP地址,则不做修改,将其转发给目标eNB。
步骤三.对来自所配置的网管IP地址的数据包,分发模块将其转发给OM模块。这些数据包包含的内容有本地业务服务器的IP地址、DNS域名字符串信息,特定辅助服务的IP地址,例如辅助的定位服务器IP地址。
步骤四.分发模块对于S1AP消息仅仅是镜像处理,即对分发模块具有识别S1AP消息的能力,S1AP模块只解析消息,不需要处理完消息后再发出。
步骤五.为了防止内存溢出问题,S1AP解析模块还需要解析出S1AP消息:UE上下文释放请求(UE Context Release Request)消息、路径转换请求或响应(Path Switch Request/Response)消息,接收到这些消息后,上报给控制模块,控制模块能够根据这些信息对GTPU模块原有的对应关系进行删除,以保证软件的健壮性。
由此可见,在分流服务器侧,参见图3,本发明实施例提供的一种数据传输方法包括:
S101、监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据;
S102、当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器。
通过该方法,监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据;当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器,从而不需要在HSS配置专门的APN,也不需要核心网处理本地业务数据,避免了业务抖动,提高了业务效果,优化了整个系统架构和性能。
较佳地,所述监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据之前,该方法还包括:
接收UE发送的域名系统DNS解析请求报文,对该DNS解析请求报文中携带的域名字段进行解析,从DNS服务器的数据库中查询该域名字段与本地业务服务器IP地址对应关系,获取所述本地业务服务器的IP地址,并向该UE返回该本地业务服务器的IP地址。
较佳地,所述向该UE返回该本地业务服务器的IP地址之后,监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据之前,该方法还包括:
监听所述eNB与演进分组核心网EPC之间的S1接口信令,从监听到的S1接口信令中获取S1接口业务面的IP地址与通用分组无线业务隧道协议用户面GTPU隧道信息,针对分组数据网PDN连接对应的默认承载,通过GTPU隧道信息,建立UE IP地址、本地业务服务器IP地址和GTPU隧道头信息的对应关系。
较佳地,所述当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器,具体包括:
若存在UE与EPC之间的GTPU上行数据包的目的地址是本地业务服务器的IP地址,则根据本地业务服务器IP地址与GTPU隧道头信息对应关系,将该GTPU上行数据包去掉GTPU隧道头后,发送给所述本地业务服务器。
较佳地,所述当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器,具体包括:
若存在UE与EPC之间的GTPU上行数据包的目的地址不是所述本地业务服务器的IP地址,则将该GTPU上行数据包透明转发到所述EPC。
较佳地,所述当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器,具体包括:
若存在UE与EPC之间的下行数据包的IP数据包的源地址是所述本地业务服务器的IP地址,目标地址是UE IP地址,则根据UE IP地址与GTPU隧道头信息的对应关系,对该下行数据包增加UE IP地址对应的GTPU隧道头后,发送给该UE所对应的eNB。
较佳地,所述当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器,具体包括:
对来自所述EPC的GTPU和/或流控制传输协议SCTP下行数据包,透明转发到eNB。
相应地,在分流服务器侧,参见图4,本发明实施例提供的一种数据传输装置包括:
第一单元11,用于监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据;
第二单元12,用于当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器。
较佳地,所述第一单元在监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据之前,还用于:
接收UE发送的域名系统DNS解析请求报文,对该DNS解析请求报文中携带的域名字段进行解析,从DNS服务器的数据库中查询该域名字段与本地业务服务器IP地址对应关系,获取所述本地业务服务器的IP地址,并向该UE返回该本地业务服务器的IP地址。
较佳地,所述第一单元在向该UE返回该本地业务服务器的IP地址之后,监听演进型 基站eNB与演进分组核心网EPC之间的S1接口数据之前,还用于:
监听所述eNB与演进分组核心网EPC之间的S1接口信令,从监听到的S1接口信令中获取S1接口业务面的IP地址与通用分组无线业务隧道协议用户面GTPU隧道信息,针对分组数据网PDN连接对应的默认承载,通过GTPU隧道信息,建立UE IP地址、本地业务服务器IP地址和GTPU隧道头信息的对应关系。
较佳地,所述第二单元具体用于:
若存在UE与EPC之间的GTPU上行数据包的目的地址是本地业务服务器的IP地址,则根据本地业务服务器IP地址与GTPU隧道头信息对应关系,将该GTPU上行数据包去掉GTPU隧道头后,发送给所述本地业务服务器。
较佳地,所述第二单元具体用于:若存在UE与EPC之间的GTPU上行数据包的目的地址不是所述本地业务服务器的IP地址,则将该GTPU上行数据包透明转发到所述EPC。
较佳地,所述第二单元具体用于:
若存在UE与EPC之间的下行数据包的IP数据包的源地址是所述本地业务服务器的IP地址,目标地址是UE IP地址,则根据UE IP地址与GTPU隧道头信息的对应关系,对该下行数据包增加UE IP地址对应的GTPU隧道头后,发送给该UE所对应的eNB。
较佳地,所述第二单元具体用于:
对来自所述EPC的GTPU和/或流控制协议SCTP下行数据包,透明转发到eNB。
上述第一单元和第二单元,可以理解为对图2中所述的其他指定IP地址解析分流模块的具体细化。
以上各单元均可以由处理器等实体装置实现,该数据传输装置可以是所述的分流服务器,该数据传输装置内部的模块或单元的划分方式,不局限于本发明实施例提供的划分方式,可以有多种划分方式,本发明实施例不作具体限制。
综上所述,本发明实施例提供的技术方案,简单、实用,对原有的网络架构影响小,能够提高用户的业务体验,不需要在HSS配置专门的APN,也不需要核心网感知,解决小站密集部署场景下本地部署APP业务服务器时从接入网分流本地业务的问题。当存在UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器,从而不需要在HSS配置专门的APN,也不需要核心网处理本地业务数据,避免业务抖动,提高业务效果,优化整个系统架构和性能。
本领域内的技术人员应明白,本发明的实施例可提供为方法、系统、或计算机程序产品。因此,本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。

Claims (17)

  1. 一种数据传输方法,其特征在于,该方法包括:
    监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据;
    当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器。
  2. 根据权利要求1所述的方法,其特征在于,所述监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据之前,该方法还包括:
    接收UE发送的域名系统DNS解析请求报文,对该DNS解析请求报文中携带的域名字段进行解析,从DNS服务器的数据库中查询该域名字段与本地业务服务器IP地址对应关系,获取所述本地业务服务器的IP地址,并向该UE返回该本地业务服务器的IP地址。
  3. 根据权利要求2所述的方法,其特征在于,所述向该UE返回该本地业务服务器的IP地址之后,监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据之前,该方法还包括:
    监听所述eNB与演进分组核心网EPC之间的S1接口信令,从监听到的S1接口信令中获取S1接口业务面的IP地址与通用分组无线业务隧道协议用户面GTPU隧道信息,针对分组数据网PDN连接对应的默认承载,通过GTPU隧道信息,建立UE IP地址、本地业务服务器IP地址和GTPU隧道头信息的对应关系。
  4. 根据权利要求3所述的方法,其特征在于,所述当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器,具体包括:
    若存在UE与EPC之间的GTPU上行数据包的目的地址是本地业务服务器的IP地址,则根据本地业务服务器IP地址与GTPU隧道头信息的对应关系,将该GTPU上行数据包去掉GTPU隧道头后,发送给所述本地业务服务器。
  5. 根据权利要求3所述的方法,其特征在于,所述当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器,具体包括:
    若存在UE与EPC之间的GTPU上行数据包的目的地址不是所述本地业务服务器的IP地址,则将该GTPU上行数据包透明转发到所述EPC。
  6. 根据权利要求3所述的方法,其特征在于,所述当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务 服务器,具体包括:
    若存在UE与EPC之间的下行数据包的IP数据包的源地址是所述本地业务服务器的IP地址,目标地址是UE IP地址,则根据UE IP地址与GTPU隧道头信息的对应关系,对该下行数据包增加UE IP地址对应的GTPU隧道头后,发送给该UE所对应的eNB。
  7. 根据权利要求3所述的方法,其特征在于,所述当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器,具体包括:
    若存在UE与EPC之间的GTPU下行数据包的目的地址不是所述本地业务服务器的IP地址,而是UE IP地址,则将该GTPU上行数据包透明转发到该UE所对应的eNB。
  8. 根据权利要求3所述的方法,其特征在于,所述当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器,具体包括:
    对来自所述EPC的GTPU和/或流控制传输协议SCTP下行数据包,透明转发到eNB。
  9. 一种数据传输装置,其特征在于,该装置包括:
    第一单元,用于监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据;
    第二单元,用于当存在用户设备UE与EPC之间的本地业务数据时,将UE与EPC之间的本地业务数据分流到设置在接入网侧的本地业务服务器。
  10. 根据权利要求9所述的装置,其特征在于,所述第一单元在监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据之前,还用于:
    接收UE发送的域名系统DNS解析请求报文,对该DNS解析请求报文中携带的域名字段进行解析,从DNS服务器的数据库中查询该域名字段与本地业务服务器IP地址对应关系,获取所述本地业务服务器的IP地址,并向该UE返回该本地业务服务器的IP地址。
  11. 根据权利要求10所述的装置,其特征在于,所述第一单元在向该UE返回该本地业务服务器的IP地址之后,监听演进型基站eNB与演进分组核心网EPC之间的S1接口数据之前,还用于:
    监听所述eNB与演进分组核心网EPC之间的S1接口信令,从监听到的S1接口信令中获取S1接口业务面的IP地址与通用分组无线业务隧道协议用户面GTPU隧道信息,针对分组数据网PDN连接对应的默认承载,通过GTPU隧道信息,建立UE IP地址、本地业务服务器IP地址和GTPU隧道头信息的对应关系。
  12. 根据权利要求11所述的装置,其特征在于,所述第二单元具体用于:
    若存在UE与EPC之间的GTPU上行数据包的目的地址是本地业务服务器的IP地址, 则根据本地业务服务器IP地址与GTPU隧道头信息对应关系,将该GTPU上行数据包去掉GTPU隧道头后,发送给所述本地业务服务器。
  13. 根据权利要求11所述的装置,其特征在于,所述第二单元具体用于:若存在UE与EPC之间的GTPU上行数据包的目的地址不是所述本地业务服务器的IP地址,则将该GTPU上行数据包透明转发到所述EPC。
  14. 根据权利要求11所述的装置,其特征在于,所述第二单元具体用于:
    若存在UE与EPC之间的下行数据包的IP数据包的源地址是所述本地业务服务器的IP地址,目标地址是UE IP地址,则根据UE IP地址与GTPU隧道头信息的对应关系,对该下行数据包增加UE IP地址对应的GTPU隧道头后,发送给该UE所对应的eNB。
  15. 根据权利要求11所述的装置,其特征在于,所述第二单元具体用于:
    若存在UE与EPC之间的GTPU下行数据包的目的地址不是所述本地业务服务器的IP地址,而是UE IP地址,则将该GTPU上行数据包透明转发到该UE所对应的eNB。
  16. 根据权利要求11所述的装置,其特征在于,所述第二单元具体用于:
    对来自所述EPC的GTPU和/或流控制传输协议SCTP下行数据包,透明转发到eNB。
  17. 一种通信系统,包括接入网设备和核心网设备,其特征在于,在所述接入网设备和所述核心网设备之间,还包括权利要求10~16任一权项所述的装置,以及与该装置连接的本地业务服务器。
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