CN105554821B - Mobile traffic management system facing intelligent mobile terminal protocol - Google Patents
Mobile traffic management system facing intelligent mobile terminal protocol Download PDFInfo
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- CN105554821B CN105554821B CN201610049223.6A CN201610049223A CN105554821B CN 105554821 B CN105554821 B CN 105554821B CN 201610049223 A CN201610049223 A CN 201610049223A CN 105554821 B CN105554821 B CN 105554821B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Abstract
The invention relates to the field of mobile traffic management, in particular to a mobile and wireless Stack-less (NO Stack) network side architecture based on SDN idea and a redesigned mobile terminal (intelligent mobile phones with various application functions and tablet computers with the functions of 3G, LTE, WiFi and the like) three-layer network protocol architecture, which are researched for specific implementation schemes of technologies such as roaming, unloading, wireless link aggregation and the like, and an offload process based on the mobile terminal protocol architecture is explained. Therefore, the technical scheme adopted by the invention is that the mobile traffic management architecture facing the intelligent mobile terminal protocol comprises the following 3 modules: the system comprises a virtual resource layer module, a terminal operating system layer module and an application layer module. The invention is mainly applied to mobile communication flow management.
Description
Technical Field
The invention relates to the field of mobile traffic management, in particular to a mobile traffic management method oriented to an intelligent mobile terminal protocol architecture.
Background
With the rapid development of the internet, the number of Network users increases, various Network applications are generated successively, the generated mass data puts new requirements on the Network, the traditional Network has the defects of complexity, inefficiency and closure, and Software Defined Network (SDN) technology is generated under the large background. The SDN is a novel network innovation architecture provided by the research group of clean slate of Stanford university in America, and the design concept of the SDN is to separate a control plane and a data forwarding plane of a network, so that programmable control bottom hardware is realized through a software platform in a centralized controller, and flexible network resource allocation as required is realized. In the SDN network, the network device is only responsible for pure data forwarding, and may adopt general hardware; the original operating system responsible for control is abstracted into an independent network operating system which is responsible for adapting to different service characteristics, and the communication among the network operating system, the service characteristics and the hardware equipment can be realized through programming. Compared with the traditional network, the SDN separates the network control plane from the forwarding plane, adopts centralized control to replace the original distributed control, realizes 'software definition' through an open and programmable interface, realizes network virtualization, IT and software, is a global and subversive technology, and has profound influence on the network architecture evolution.
In many network construction modes, wireless network users have an increasing weight due to great convenience of wireless device usage. With the popularization of smart phones, mobile services are on a trend from a mode mainly based on voice/short message services to a mode mainly based on mobile internet services. And the data generated by the mobile internet is rapidly increased, the mobile internet accounts for 1.5 times of the global internet traffic year by year, and the business of browsing, searching, shopping and the like is gradually shifted to the mobile phone from a Personal Computer (PC). Therefore, there is increasing interest in extending SDNs to wireless and mobile networks.
In the research of 3GPP Long Term Evolution (LTE) technology, heterogeneous networks are considered to play an important role in future mobile communication networks. In a heterogeneous network, under a Macro cell covered by a Macro base station (Macro), a plurality of small-scale station devices of different types, such as a Micro base station (Micro), a Pico base station (Pico), a home base station (Femto), and the like, can be introduced for enhancing the coverage of a specific area and improving the network capacity. The small-sized station equipment has the characteristic of low power consumption, is often deployed at a position closer to a user, and can provide service for the user with power consumption far less than that of a macro base station. Therefore, offloading (offloading) traffic of macro base stations to low-power small-sized stations in the heterogeneous network is considered as an effective technical means for increasing system capacity and reducing system energy consumption.
The traffic offload problem is one of hot spot problems in a heterogeneous network, and a centralized control wireless access point based on an SDN can realize optimal channel allocation, consistent user authentication and avoid interference by setting power. Unlike distributed wireless networks, controllers with global networks may attempt to bring better consistency. The mobile subscriber may roam between different aps without changing IP addresses, or the mobile subscriber may switch between different WIreless technologies, such as 3rd-Generation (3G), LTE, WIreless FIdelity (WiFi), etc. How to manage a plurality of wireless users, how to improve the utilization efficiency of wireless resources, how to flexibly change applications on some access devices, etc. become a popular research topic.
Disclosure of Invention
In order to overcome the defects of the prior art, a mobile and wireless Stack-free (NO Stack) network side architecture based on an SDN idea and a redesigned mobile terminal (a smart phone with multiple application functions and a tablet computer with the functions of 3G, LTE, WiFi and the like) three-layer network protocol architecture are applied, specific implementation schemes of technologies such as roaming, unloading, wireless link aggregation and the like are researched, and an offload process based on the mobile terminal protocol architecture is explained. Therefore, the technical scheme adopted by the invention is that the mobile traffic management system facing the intelligent mobile terminal protocol is characterized by comprising the following 3 modules: the system comprises a virtual resource layer module, a terminal operating system layer module and an application layer module;
the lowest layer is a virtual resource layer, each layer of a mobile terminal protocol stack is encapsulated into an independent sub-module, the sub-modules are configured through a flow table, and the sub-modules can be added or modified as required;
the middle layer is a terminal operating system layer, a controller runs in the layer and comprises a local controller and a remote controller, wherein the local controller runs at a mobile terminal and is only responsible for controlling the mobile terminal, the remote controller runs at a cloud terminal, is a global controller of the whole network and is responsible for centralized control of the whole network, and the local controller and the remote controller use a uniform interface to interact with the lower layer;
the top layer is an application layer, and only an application program calling Interface (API) exists between the top layer and the local controller;
combining a three-layer framework of mobile flow management facing to an intelligent mobile terminal protocol, and utilizing a virtualization technology to perform generalization and transparentization on bottom hardware of a virtual resource layer; the middle terminal operating system layer comprises a local controller specially developed for the mobile terminal and a remote controller at the cloud end, and the local controller can run on the terminal of the Android or iOS operating system to control the terminal and interact with a remote global controller; when the mobile terminal realizes the offloading process, the mobile terminal application of the used application layer is an offloading APP specially developed for the network traffic offloading function, the specific execution of the application is completed by the controller, the controller can send the related information carried in the message with a specified format for updating the flow table, and each flow table corresponds to one sub-module, so that the controller can arrange and manage each protocol sub-module of the lowest layer.
There is no direct physical communication link between the mobile terminal and the global controller, the data transmission must be forwarded through the Evolved Node B (Evolved Node B) in the LTE, and the mobile terminal has the speed and direction attributes.
offloading mainly refers to handover from LTE to WiFi, and also can switch from WiFi to LTE, and determines whether and how to offload network traffic according to the rate, size, charging condition, and network congestion degree of data traffic; when the mobile terminal generates an offload service requirement, the local controller sends a request to the remote controller, the remote controller knows that the terminal needs to transmit a large amount of data and has an accessible Wireless Access Point (WiFi AP) nearby, the remote controller can partially configure a flow table of the mobile terminal according to the requirement and the network condition, and the local controller configures the rest parts; modifying flow tables of the terminal, the base station and the WiFi AP through cooperative control of the local controller and the remote controller, converting the terminal into an offload state, and establishing connection with the WiFi AP; similarly, when the mobile terminal needs to be switched back to the LTE from WiFi, the local controller and the remote controller perform interactive control to modify the flow tables of the terminal, the WiFi AP and the base station, so that the mobile terminal is switched back to the LTE network.
The invention has the characteristics and beneficial effects that:
compared with the prior art, the invention has the advantages that the intelligent terminal can select the optimal access point according to the requirement through the offload process based on the mobile terminal protocol architecture, and the seamless, lossless, low-cost and low-power-consumption communication is realized. And by applying the SDN idea, the mobile terminal has flexibility and expandability.
Description of the drawings:
figure 1 is a schematic diagram of a mobile terminal protocol system based on SDN.
Fig. 2 is a functional diagram of a mobile terminal.
Fig. 3 is a schematic diagram of the flooding process.
Detailed Description
The invention relates to the field of mobile traffic management, in particular to a research on a specific implementation scheme of technologies such as roaming, unloading, wireless link aggregation and the like based on a mobile and wireless network architecture of an SDN (software defined network) and a redesigned mobile terminal network protocol architecture. And more particularly, to an offload process of a mobile terminal.
The technical scheme adopted by the invention is as follows: by applying the idea of the SDN, a mobile and wireless network architecture based on the SDN can be matched, a network side architecture compatible with the NO Stack is designed, and a three-layer protocol architecture based on the SDN of the mobile terminal is provided, wherein the three-layer protocol architecture comprises a virtual resource layer, a terminal operating system layer and an application layer. And based on the protocol architecture of the invention, a mechanism for communication between the mobile terminal and the controller is provided.
The mobile terminal adopts a 3-layer framework in the SDN, and comprises a virtual resource layer, a terminal operating system layer and an application layer. As shown in fig. 1.
The lowest layer is a virtualized system resource layer. Each layer of the existing mobile terminal protocol stack is encapsulated into an independent module, the module is configured through a flow table, and the module can be added or modified according to needs, so that the flexibility and the expandability are realized.
The middle layer is an operating system of the mobile terminal, and a Controller is operated in the middle layer and comprises a Local Controller (Local Controller) and a Remote Controller (Remote Controller). The local controller operates at the mobile terminal and is only responsible for controlling the mobile terminal. The remote controller runs at the cloud end, is a global controller of the whole network and is responsible for centralized control of the whole network. Both local and remote controllers use a unified interface to interact with the lower layers.
The top layer is an application layer, and the applications are common mobile terminal applications, and only an API exists between the applications and the local controller.
Fig. 2 illustrates the location of a mobile terminal throughout a network. As shown in fig. 2, the mobile terminal is similar to the eNodeB in that, unlike the eNodeB, there is no direct physical communication link between the mobile terminal and the global controller, so that data transmission must be forwarded through the eNodeB, and the mobile terminal and the eNodeB communicate through a wireless interface. The mobile terminal and the eNodeB use the same interface with the global controller (the mobile terminal and the global controller are logically connected, and data transmission still needs to be forwarded through the eNodeB), and interact using the flow table. Another difference is that the position of the mobile terminal changes all the time, so that the mobile terminal also has attributes such as speed and direction, and in order to realize the overall control of the whole network, the mobile terminal also stores the state information related to the movement of the mobile terminal along with other useful information into a distributed global state database at intervals.
Fig. 3 illustrates the flooding process. As shown in fig. 3, in combination with a three-layer architecture of mobile traffic management oriented to an intelligent mobile terminal protocol, bottom hardware of a virtual resource layer is generalized and transparent by using a virtualization technology, which is mainly embodied in modularization and virtualization of a protocol stack in the virtual resource layer. The middle control layer comprises a controller specially developed for the mobile terminal and a remote controller at the cloud end, and the local controller can run on the terminal of an Android or iOS operating system to control the local controller and interact with a remote global controller. When the mobile terminal realizes the offloading process, the mobile terminal application of the used application layer is an offloading APP developed specifically for the network traffic offloading function, and the specific execution of the application is completed through the controller. The controller can send a message with a specified format, wherein the carried information is used for updating the flow tables, each flow table corresponds to one module, therefore, the controller can arrange and manage each protocol module at the lowest layer, and the arranging and managing strategy and the hardware realizing strategy are in accordance with the existing wireless communication specification, so that the controller can be modified and upgraded on the basis of the existing wireless communication architecture.
The offloading mainly refers to handover from LTE to WiFi, and also may switch from WiFi to LTE, and determines whether and how to offload network traffic according to factors such as rate, size, charging condition, and network congestion degree of data traffic. When the mobile terminal generates an offloading (switching from LTE to WiFi) service requirement, the local controller sends a request to the remote controller, the remote controller knows that the terminal needs to transmit a large amount of data and has an accessible WiFi AP nearby, the remote controller partially configures a flow table of the mobile terminal according to the requirement and the network condition, and the local controller configures the rest part. And modifying flow tables of the terminal, the base station and the WiFi AP through the cooperative control of the local controller and the remote controller to enable the terminal to be switched to an offload state, and establishing connection with the WiFi AP. Similarly, when the mobile terminal needs to be switched back to the LTE from WiFi, the local controller and the remote controller perform interactive control to modify the flow tables of the terminal, the WiFi AP and the base station, so that the mobile terminal is switched back to the LTE network.
Claims (3)
1. A mobile traffic management system facing to an intelligent mobile terminal protocol is characterized by comprising the following 3 modules: the system comprises a virtual resource layer module, a terminal operating system layer module and an application layer module;
the lowest layer is a virtual resource layer, each layer of a mobile terminal protocol stack is encapsulated into an independent sub-module, the sub-modules are configured through a flow table, and the sub-modules can be added or modified as required;
the middle layer is a terminal operating system layer, a controller runs in the layer and comprises a local controller and a remote controller, wherein the local controller runs at a mobile terminal and is only responsible for controlling the mobile terminal, the remote controller runs at a cloud terminal, is a global controller of the whole network and is responsible for centralized control of the whole network, and the local controller and the remote controller use a uniform interface to interact with the lower layer;
the top layer is an application layer, and only an application program calling Interface (API) exists between the top layer and the local controller;
combining a three-layer framework of mobile flow management facing to an intelligent mobile terminal protocol, and utilizing a virtualization technology to perform generalization and transparentization on bottom hardware of a virtual resource layer; the middle terminal operating system layer comprises a local controller specially developed for the mobile terminal and a remote controller at the cloud end, and the local controller can run on the terminal of the Android or iOS operating system to control the terminal and interact with a remote global controller; when the mobile terminal realizes the offloading process, the mobile terminal application of the used application layer is an offloading APP specially developed for the network traffic offloading function, the specific execution of the application is completed by the controller, the controller can send the related information carried in the message with a specified format for updating the flow table, and each flow table corresponds to one sub-module, so that the controller can arrange and manage each protocol sub-module of the lowest layer.
2. The system as claimed in claim 1, wherein the mobile terminal has no direct physical communication link with the global controller, the data transmission must be forwarded through an Evolved Node B (Evolved Node B) in LTE, and the mobile terminal has speed and direction attributes.
3. The system according to claim 1, wherein offloading mainly refers to handover from LTE to WiFi, and also can switch from WiFi to LTE, and determines whether and how to offload network traffic according to data traffic rate, size, charging condition, and network congestion level; when the mobile terminal generates an offload service requirement, the local controller sends a request to the remote controller, the remote controller knows that the terminal needs to transmit a large amount of data, and has an accessible wireless access point WiFiAP (Wireless Access Point) nearby, the remote controller can partially configure a flow table of the mobile terminal according to the requirement and the network condition, and the local controller configures the rest parts; modifying flow tables of the terminal, the base station and the WiFiAP through cooperative control of the local controller and the remote controller, converting the terminal into an offload state, and establishing connection with the WiFiAP; similarly, when the mobile terminal needs to be switched back to the LTE from WiFi, the local controller and the remote controller perform interactive control to modify the flow tables of the terminal, the WiFi AP and the base station, so that the mobile terminal is switched back to the LTE network.
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| CN107148061B (en) * | 2017-06-15 | 2020-09-29 | 重庆邮电大学 | LTE and WLAN heterogeneous network switching system and method based on SDN |
| CN108990110B (en) * | 2018-07-26 | 2022-02-22 | Oppo广东移动通信有限公司 | Network traffic management method, device, storage medium and terminal |
| CN109362087B (en) * | 2018-11-05 | 2020-08-04 | 北京邮电大学 | Heterogeneous cloud wireless access network-based traffic offload cooperation method and system |
| CN114650209A (en) * | 2022-04-15 | 2022-06-21 | 中国电信股份有限公司 | Network architecture |
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| WO2014139558A1 (en) * | 2013-03-12 | 2014-09-18 | Nec Europe Ltd. | A packet data network, a method for operating a packet data network and a flow-based programmable network device |
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