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Data flow distribution method and controller

A technology of controller and data flow, which is applied in the field of mobile communication, can solve the problems of data detour, non-distribution, and application granular data distribution, etc., and achieve the effect of improving competitiveness and fine-grained distribution

Inactive Publication Date: 2015-05-20
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this routing method also faces a problem: in the current network, the position of the PGW is relatively high. For some service data, such as Internet services, a large number of service data packets are routed to the PGW with a high position, which will cause serious problems. Serious data detour and waste of backbone network bandwidth resources
However, the above schemes also have the following defects: schemes 1-3 are based on offloading of PDN connections, that is, UE establishes a PDN connection corresponding to an IP address, and all services using this IP address / PDN connection must be offloaded or No splitting, but it is impossible to split the data flow of some applications using the IP address, and some of them do not split
Moreover, although the distribution granularity of solution 4 is slightly finer than that of solutions 1-3, it still cannot achieve data distribution at the application granularity
[0005] The offloading technology with the above defects is unfavorable both from the perspective of user experience and from the perspective of enhancing the competitiveness of operators

Method used

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Examples

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example 1

[0039] This embodiment introduces a scenario where a terminal accesses the EPS core network EPC from EUTRAN or UTRAN. Such as image 3 shown. In this embodiment, the specific operation steps for splitting the data flow are discussed as follows:

[0040] 1) After the terminal UE is attached, at least one PDN connection is established. The SDN controller selects the UGW for it to perform the functions of the SGW and the PGW connected by the PDN respectively.

[0041] 2) During the attachment / PDN connection establishment process, the SDN controller sends the data flow flow table to the offload gateway, SGW and PGW respectively, and through the filtering of the flow table, all uplink data packets belonging to the PDN connection first message,

[0042] Or it can reach the PGW / UGW, and according to the instructions issued by the SDN controller to the PGW / UGW, the PGW / UGW forwards the first packet of all or part of the application data flow to the DPI of the data center;

[0043]...

example 2

[0059] Figure 4 It is a schematic diagram of data flow splitting in the non-3GPP access EPS scenario according to Embodiment 2 of the present invention. The basic principle is the same as in Example 1, and the differences are described below.

[0060] The distribution gateway is the UGW where the non-3GPP access gateway is located, such as the HSGW of the CDMA access technology, or the UGW where the BNG / BRAS / IP Edge / AC of the WLAN access technology is located, or the configuration between the base station and the access gateway. Good or the UGW dynamically selected by the Controller to ensure that the data flow must be able to pass through.

[0061] The diversion gateway also implements a diversion mechanism based on NAT address translation, except that instead of removing / adding the GTP header, it removes and adds the header based on the corresponding access technology. For example, if the link between the UE and the access gateway is PPP, then the distribution gateway need...

Embodiment 3

[0063] Figure 5 It is a schematic diagram of data flow splitting in the scenario of 3GPP accessing GPRS according to Embodiment 3 of the present invention. The basic principle is the same as that of Example 1, and the differences are described below.

[0064] The distribution gateway is the UGW where the 3GPP SGSN is located, or the UGW that is configured between the RNC and the SGSN, or is dynamically selected by the Controller, and ensures that the data flow must pass through.

[0065] The diversion gateway also implements the diversion mechanism based on NAT address translation, and also performs operations of removing / adding the GTP header and replacing addresses, and the principle is the same as in the first embodiment.

[0066] Aiming at the specificity of some applications, the above technical solutions of the embodiments of the present invention will be described in detail below.

[0067] 1. In the case where the terminal initiates the first type of application that ...

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Abstract

Disclosed are a data flow distribution method and a controller. The method comprises: a software defined network (SDN) controller acquiring data flow description information of a data flow; and the SDN controller deciding, according to the data flow description information, whether the data flow needs distribution, and if distribution is needed, delivering a distribution rule flow table to a distribution gateway. By using the technical solutions of the present invention, application / service data flow based distribution is implemented. Compared with the prior art that distribution is implemented based on a PDN connection and based on a bearer, the technical solutions in embodiments of the present invention implement finer-granularity distribution, and improve experience of users and competition of operators.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a data stream splitting method and a controller. Background technique [0002] In the existing technology, the OpenFlow protocol is a forwarding / control separation protocol proposed by Stanford University in 2008. The external control plane entity uses the OpenFlow protocol to control the forwarding plane equipment to realize various forwarding logics, and the main function of the forwarding plane equipment is Controlled forwarding according to the flow table issued by the OpenFlow controller. The OpenFlow protocol has further evolved into a software-defined network (Software Defined Network, referred to as SDN) technology, that is, software programming can be used on the control plane to implement various complex network applications, for example, using SDN to implement an evolved packet system (Evolved Packet System, referred to as EPS) / General Packet Radio Service (GPRS fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/801H04W28/10
CPCH04L45/64H04L41/083H04L41/5054H04W76/12H04L45/38H04L41/342H04W76/10H04L43/028H04L61/256H04W88/16
Inventor 毕以峰王静田甜汪军
Owner ZTE CORP
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