KR20120010553A - Method for controlling packet data network in wireless communication system and apparatus therefor - Google Patents

Abstract

PURPOSE: A packet data network controlling method and apparatus thereof are provided to enable a terminal to efficiently control packet data network. CONSTITUTION: A PDN(Packet Data Network) control unit executes one of applications. An apparatus accesses a network server by using PDN corresponding to the executed application. The apparatus transmits and receives data for executed application from/to the network server. The PDN is performed in an OS(Operating System) based on the type of the application.

Description

METHOD FOR CONTROLLING PACKET DATA NETWORK IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR}

The present invention relates to a wireless communication system. More specifically, the present invention relates to a packet data network control method and apparatus therefor in a wireless communication system.

As an example of a wireless communication system to which the present invention can be applied, a 3GPP LTE (3rd Generation Partnership Project Long Term Evolution (LTE)) communication system will be described.

1 is a diagram schematically illustrating an E-UMTS network structure as an example of a mobile communication system. The Evolved Universal Mobile Telecommunications System (E-UMTS) system evolved from the existing Universal Mobile Telecommunications System (UMTS), and is currently undergoing basic standardization work in 3GPP. In general, E-UMTS may be referred to as an LTE (Long Term Evolution) system. For details of the technical specifications of UMTS and E-UMTS, refer to Release 7 and Release 8 of "3rd Generation Partnership Project (Technical Specification Group Radio Access Network)" respectively.

1, an E-UMTS is located at the end of a user equipment (UE) 120, an eNode B (eNode B) 110a and 110b, and a network (E-UTRAN) And an access gateway (AG). The base station may transmit multiple data streams simultaneously for broadcast service, multicast service and / or unicast service.

One or more cells exist in one base station. The cell is set to one of the bandwidths of 1.25, 2.5, 5, 10, 15, 20Mhz and the like to provide downlink or uplink transmission service to a plurality of UEs. Different cells may be configured to provide different bandwidths. The base station controls data transmission and reception for a plurality of terminals. For downlink (DL) data, the base station transmits downlink scheduling information, which is related to time / frequency domain, encoding, data size, and hybrid automatic repeat and reQuest (HARQ) request for data to be transmitted to the corresponding UE. Give information and more. In addition, the base station transmits uplink scheduling information to the terminal for uplink (UL) data and informs the user equipment of time / frequency domain, encoding, data size, and hybrid automatic retransmission request information. An interface for transmitting user traffic or control traffic may be used between base stations. The Core Network (CN) can be composed of an AG and a network node for user registration of the UE. The AG manages the mobility of the UE in units of a tracking area (TA) composed of a plurality of cells.

Wireless communication technologies have been developed to LTE based on WCDMA, but the demands and expectations of users and operators are continuously increasing. In addition, as other radio access technologies continue to be developed, new technological evolution is required to be competitive in the future. Reduced cost per bit, increased service availability, the use of flexible frequency bands, simple structure and open interface, and adequate power consumption of the terminal are required.

Recently, 3GPP has been working on standardization of follow-up technology for LTE. In the present specification, the above technique is referred to as "LTE-Advanced" or "LTE-A". One of the major differences between LTE and LTE-A systems is the difference in system bandwidth. The LTE-A system aims to support a broadband of up to 100 MHz, and for this purpose, a carrier aggregation or bandwidth aggregation technique for achieving broadband using a plurality of frequency blocks is intended. Carrier aggregation allows a plurality of frequency blocks to be used as one large logical frequency band in order to use a wider frequency band. The bandwidth of each frequency block may be defined based on the bandwidth of the system block used in the LTE system. Each frequency block is transmitted using a component carrier.

Based on the discussion as described above, the present invention proposes a method and apparatus for controlling a packet data network in a wireless communication system.

In a wireless communication system of the present invention for solving the above problems, a method for controlling a plurality of PDNs (Packet Data Network), the method comprising: executing at least one of a plurality of applications; Accessing a network server using a PDN corresponding to the executed application; And transmitting and receiving data for the executed application with the network server, wherein the control of the PDN is performed by the application itself or an operating system based on the application type. The PDN corresponding to the executed application may be one of an IMS (IP Multimedia Subsystem) PDN, an Internet PDN, an Administrative PDN, and an operator-specific application PDN.

On the other hand, if the PDN corresponding to the executed application is the IMS PDN or the operator-specific application PDN, the control of the PDN is performed by the operating system, in which case the operating system and the PDN corresponding to the executed application; The method may further include transmitting a connection state of the intent to the executed application.

Or, if the PDN corresponding to the executed application is the IMS PDN or the Administrative PDN, controlling the PDN is performed by the application, and the application generates a control message of the PDN; Forwarding a control message of the PDN to the operating system; And controlling, by the operating system, the PDN based on the control message of the PDN.

On the other hand, the terminal device of the present invention for solving the above problems, the application layer for executing a plurality of applications; A wireless communication module for accessing a network server using a PDN corresponding to the application, and transmitting and receiving data for the executed application with the network server; And an operating system layer for controlling the application layer and the wireless communication module, wherein the control of the PDN is performed in the application layer or the operating system layer based on the application type. Similarly, the PDN corresponding to the application is preferably one of an IMS (IP Multimedia Subsystem) PDN, an Internet PDN, an Administrative PDN, and a provider-specific application PDN.

In this case, when the PDN corresponding to the executed application is the IMS PDN or the operator-specific application PDN, the control of the PDN is performed by the operating system layer, and the operating system layer is connected to a PDN corresponding to the application. It is characterized by delivering to the executed application through the intent.

Alternatively, when the PDN corresponding to the application is the IMS PDN or the Administrative PDN, the control of the PDN is performed in the application layer, and the application layer generates a control message of the PDN and delivers it to the operating system layer. The operating system layer controls the PDN based on a control message of the PDN.

According to an embodiment of the present invention, a terminal can effectively control a packet data network in a wireless communication system.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

1 is a diagram schematically illustrating an E-UMTS network structure as an example of a mobile communication system;
FIG. 2 is a diagram illustrating a control plane and a user plane structure of a radio interface protocol between a terminal and an E-UTRAN based on a 3GPP radio access network standard; FIG.
3 is a conceptual diagram illustrating a method of controlling a PDN in a terminal supporting a single PDN;
4 is a conceptual diagram illustrating a method of controlling a PDN in a terminal supporting a plurality of PDNs.
5 is a conceptual diagram illustrating a method of controlling an Internet PDN in a terminal supporting a plurality of PDNs;
6 is a conceptual diagram illustrating a method of controlling an operator-specific application PDN in a terminal supporting a plurality of PDNs;
7 is a conceptual diagram illustrating a method of controlling an IMS PDN in a terminal supporting a plurality of PDNs;
8 is a block diagram of a communication transceiver according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following detailed description, together with the accompanying drawings, is intended to illustrate exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced. The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, one of ordinary skill in the art appreciates that the present invention may be practiced without these specific details. For example, the following detailed description will be described in detail assuming that the main mobile communication system is a 3GPP LTE system, but is applicable to any other mobile communication system except for the specific matters of 3GPP LTE.

In some instances, well-known structures and devices may be omitted or shown in block diagram form centering on the core functions of the structures and devices in order to avoid obscuring the concepts of the present invention. In addition, the same components will be described with the same reference numerals throughout the present specification.

In addition, in the following description, it is assumed that a terminal or a device collectively refers to a mobile or fixed user terminal device such as a user equipment (UE) or a mobile station (MS). In addition, it is assumed that the base station collectively refers to any node of a network end that communicates with a terminal or a device such as a Node B, an eNode B, and a Base Station.

2 is a diagram showing a control plane and a user plane structure of a radio interface protocol between a UE and an E-UTRAN based on the 3GPP radio access network standard. The control plane refers to a path through which control messages used by a UE and a network are transferred. The user plane means a path through which data generated in the application layer, for example, voice data or Internet packet data, is transmitted.

The physical layer as the first layer provides an information transfer service to an upper layer using a physical channel. The physical layer is connected to a medium access control layer (upper layer) through a transport channel. Data moves between the MAC layer and the physical layer over the transport channel. Data is transferred between the transmitting side and the receiving side physical layer through the physical channel. The physical channel utilizes time and frequency as radio resources. Specifically, the physical channel is modulated in the Orthogonal Frequency Division Multiple Access (OFDMA) scheme in the downlink, and modulated in the Single Carrier Frequency Division Multiple Access (SC-FDMA) scheme in the uplink.

The Medium Access Control (MAC) layer of the second layer provides a service to a radio link control (RLC) layer, which is an upper layer, through a logical channel. The RLC layer of the second layer supports reliable data transmission. The function of the RLC layer may be implemented as a functional block inside the MAC. The PDCP (Packet Data Convergence Protocol) layer of the second layer performs a header compression function to reduce unnecessary control information for efficiently transmitting IP packets such as IPv4 or IPv6 in a narrow bandwidth wireless interface.

The Radio Resource Control (RRC) layer located at the bottom of the third layer is defined only in the control plane. The RRC layer is responsible for controlling logical channels, transport channels, and physical channels in connection with configuration, reconfiguration, and release of radio bearers. The radio bearer refers to a service provided by the second layer for data transmission between the terminal and the network. To this end, the terminal and the RRC layer of the network exchange RRC messages with each other. If there is an RRC connection (RRC Connected) between the UE and the RRC layer of the network, the UE is in the RRC Connected Mode, otherwise it is in the RRC Idle Mode. The Non-Access Stratum (NAS) layer at the top of the RRC layer performs functions such as session management and mobility management.

One cell constituting the base station eNB is set to one of the bandwidths of 1.25, 2.5, 5, 10, 15, 20Mhz and the like to provide a downlink or uplink transmission service to a plurality of terminals. Different cells may be configured to provide different bandwidths.

A downlink transmission channel for transmitting data from a network to a terminal includes a BCH (Broadcast Channel) for transmitting system information, a PCH (Paging Channel) for transmitting a paging message, a downlink SCH (Shared Channel) for transmitting user traffic or control messages, have. In case of a traffic or control message of a downlink multicast or broadcast service, it may be transmitted through a downlink SCH, or may be transmitted via a separate downlink multicast channel (MCH). Meanwhile, the uplink transmission channel for transmitting data from the UE to the network includes a random access channel (RACH) for transmitting an initial control message and an uplink SCH (shared channel) for transmitting user traffic or control messages. It is located above the transport channel, and the logical channel mapped to the transport channel is a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), and an MTCH (multicast). Traffic Channel).

In general, there is a concept of a packet data network (PDN) for providing a service in an LTE network, through which a device is assigned an IP and can set a quality of service (QoS) according to a service.

With the development of smart phones, there is a need for multitasking, that is, multiple applications must be executed at the same time. Services provided by each application may access different PDNs with different QoS. Examples of the PDN may include an IMS (IP Multimedia Subsystem) PDN, an Internet PDN, an Administrative PDN, and a provider-specific application PDN.

3 is a conceptual diagram illustrating a method of controlling a PDN in a terminal supporting a single PDN.

3, an existing terminal supporting a single PDN only supports the corresponding PDN, that is, the Internet PDN. Therefore, all applications of the terminal can access the network only through the Internet PDN. Therefore, the control of the PDN in the existing terminal is performed by the operating system, for example, the Android framework itself, not a specific application, and the application receives only the PDN connection state through an intent.

4 is a conceptual diagram illustrating a method of controlling a PDN in a terminal supporting a plurality of PDNs.

Referring to FIG. 4, as a concept of a plurality of PDNs is introduced to an existing terminal due to multitasking, a PDN used for network access is changed for each application, and a network server connects one terminal to several PDNs. .

For example, an operator-only application may be connected to a network server through an operator-specific application PDN, and the system information application may be connected to a network server through an administrative PDN. In addition, the IMS application performs a message transmission and reception with the network server through the IMS PDN, and other general applications may be connected to the network server through the Internet PDN and run.

In the following, a method for effectively controlling a plurality of PDNs by an application and an operating system is presented.

5 is a conceptual diagram illustrating a method of controlling an Internet PDN in a terminal supporting a plurality of PDNs.

Referring to FIG. 5, the Internet PDN is a general-purpose PDN supported by a terminal supporting a single PDN. Therefore, it is desirable to control the existing method for compatibility with general applications.

That is, the Internet PDN always maintains the connected state and controls the PDN by the operating system itself, but reports only the PDN connection status through the intent to the application layer.

6 is a conceptual diagram illustrating a method of controlling an operator-specific application PDN in a terminal supporting a plurality of PDNs.

Referring to FIG. 6, in the case of an operator-specific application PDN, since a plurality of non-specific applications may be used instead of a specific application, the operating system itself performs access control, but needs to be distinguished from the existing Internet PDN. Therefore, it is desirable to report the connection state of the service provider-specific application PDN to the corresponding application through the new intents Branded_Network_Available and Branded_Network_Disable.

7 is a conceptual diagram illustrating a method for controlling an IMS PDN in a terminal supporting a plurality of PDNs.

Referring to FIG. 7, in the case of the IMS PDN and the Administrative PDN, which are dedicated PDNs for a specific application, such as an IMS application or a system information application, the number of applications accessing the network using the corresponding PDN is limited. Direct control is efficient. That is, it is preferable to connect with the corresponding PDN when the corresponding application is activated.

Therefore, the corresponding PDN may generate a control message in the corresponding application layer and transmit the control message to the operating system, and may configure the operating system to indirectly control the PDN using this. In addition, the control result of the PDN can be delivered to the application layer through a new intent.

8 illustrates a block diagram of a communication transceiver according to an embodiment of the present invention. The transceiver may be part of a base station or a terminal.

Referring to FIG. 8, the transceiver 800 includes a processor 810, a memory 820, an RF module 830, a display module 840, and a user interface module 850.

The transceiver 800 is shown for convenience of description and some modules may be omitted. In addition, the transceiver 800 may further include necessary modules. In addition, some modules in the transceiver 800 may be divided into more granular modules. The processor 810 is configured to perform an operation according to the embodiment of the present invention illustrated with reference to the drawings.

In detail, when the transceiver 800 is part of the base station, the processor 810 may generate a control signal and map the control signal to a control channel set in the plurality of frequency blocks. In addition, when the transceiver 800 is part of a terminal, the processor 810 may identify a control channel directed to the user from signals received from the plurality of frequency blocks and extract a control signal therefrom.

Thereafter, the processor 810 may perform a required operation based on the control signal. Detailed operations of the processor 810 may refer to the contents described with reference to FIGS. 1 to 7.

The memory 820 is connected to the processor 810 and stores an operating system, an application, program code, data, and the like. The RF module 830 is connected to the processor 810 and performs a function of converting a baseband signal into a radio signal or converting a radio signal into a baseband signal. To this end, the RF module 830 performs analog conversion, amplification, filtering and frequency up conversion, or a reverse process thereof. The display module 840 is connected to the processor 810 and displays various information. The display module 840 may use well-known elements such as, but not limited to, a liquid crystal display (LCD), a light emitting diode (LED), and an organic light emitting diode (OLED). The user interface module 850 is connected to the processor 810 and may be configured with a combination of well-known user interfaces such as a keypad and a touch screen.

The embodiments described above are the components and features of the present invention are combined in a predetermined form. Each component or feature is to be considered optional unless stated otherwise. Each component or feature may be implemented in a form that is not combined with other components or features. It is also possible to combine some of the components and / or features to form an embodiment of the invention. The order of the operations described in the embodiments of the present invention may be changed. Some configurations or features of certain embodiments may be included in other embodiments, or may be replaced with corresponding configurations or features of other embodiments. It is obvious that the claims may be combined to form an embodiment by combining claims that do not have an explicit citation relationship in the claims or as new claims by post-application correction.

In this document, the embodiments of the present invention have been mainly described with reference to the data transmission / reception relationship between the terminal and the base station. The specific operation described herein as being performed by the base station may be performed by its upper node, in some cases. That is, it is apparent that various operations performed for communication with a terminal in a network including a plurality of network nodes including a base station can be performed by a network node other than the base station or the base station. A base station may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point, and the like. In addition, the terminal may be replaced with terms such as a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), and the like.

Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof. In the case of a hardware implementation, an embodiment of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), FPGAs ( field programmable gate arrays), processors, controllers, microcontrollers, microprocessors, and the like.

In the case of implementation by firmware or software, an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above. The software code may be stored in a memory unit or a recording medium and driven by a processor. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit of the invention. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

Claims (12)

A method for controlling a plurality of PDNs (Packet Data Network) by a terminal in a wireless communication system,
Executing at least one of the plurality of applications;
Accessing a network server using a PDN corresponding to the executed application; And
Transmitting and receiving data for the executed application with the network server,
The control of the PDN is characterized in that performed by the application itself or the operating system based on the application type,
Multiple PDN Control Methods. The method of claim 1,
PDN corresponding to the executed application,
IMS (IP Multimedia Subsystem) PDN, Internet (Internet) PDN, Administrative PDN, characterized in that one of the carrier-specific application PDN (Branded PDN),
Multiple PDN Control Methods. The method of claim 2,
When the PDN corresponding to the executed application is the IMS PDN or the operator-specific application PDN, the control of the PDN is characterized in that performed by the operating system,
Multiple PDN Control Methods. The method of claim 3, wherein
And transmitting, by the operating system, a connection state with a PDN corresponding to the executed application to the executed application through an intent.
Multiple PDN Control Methods. The method of claim 2,
If the PDN corresponding to the executed application is the IMS PDN or the Administrative PDN, the control of the PDN is performed in the application,
Multiple PDN Control Methods. The method of claim 5, wherein
The application generating a control message of the PDN;
Forwarding a control message of the PDN to the operating system; And
And controlling, by the operating system, the PDN based on a control message of the PDN.
Multiple PDN Control Methods. An application layer for executing a plurality of applications;
A wireless communication module for accessing a network server using a PDN corresponding to the application, and transmitting and receiving data for the executed application with the network server; And
An operating system layer for controlling the application layer and the wireless communication module,
Control of the PDN is performed in the application layer or the operating system layer based on the application type,
Terminal device. The method of claim 7, wherein
PDN corresponding to the application,
IMS (IP Multimedia Subsystem), Internet (Internet) PDN, Administrative PDN, characterized in that one of the operator-specific application PDN (Branded PDN),
Terminal device. The method of claim 8,
If the PDN corresponding to the executed application is the IMS PDN or the operator-specific application PDN, the control of the PDN is characterized in that performed by the operating system layer,
Terminal device. The method of claim 9,
The operating system layer is,
Characterized in that it transmits the connection status with the PDN corresponding to the application to the executed application through an intent,
Terminal device. The method of claim 8,
When the PDN corresponding to the application is the IMS PDN or the Administrative PDN, the control of the PDN is performed in the application layer,
Terminal device. The method of claim 9,
The application layer,
Generate a control message of the PDN and forward it to the operating system layer;
The operating system layer is,
Characterized in that for controlling the PDN based on the control message of the PDN,
Terminal device.

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