KR20120092045A - Method for transmitting uplink data, base station and terminal in mobile communication system - Google Patents

Abstract

PURPOSE: A uplink data transmission method in a mobile communication system, base station, and terminal are provided to transmit uplink data without connecting to a network an M2M(Machine to Machine) terminal of an idle mode. CONSTITUTION: When uplink transmission target data is generated in an idle mode, a terminal transmit a ranging request message including a group identifier, or a non-connection transmission indicator, or uplink data(S202,S210). The group identifier is allocated according to each terminal group. The non-connection transmission indicator indicates the transmission of the uplink data in a network non-connection state. The terminal receives a raging response message from the base station(S222).

Description

Method for transmitting uplink data in mobile communication system, base station and terminal supporting it {METHOD FOR TRANSMITTING UPLINK DATA, BASE STATION AND TERMINAL IN MOBILE COMMUNICATION SYSTEM}

The present invention relates to a mobile communication system. Specifically, the present invention relates to a method for transmitting uplink data in a broadband mobile communication system.

Broadband mobile communication systems are being used for high speed data communication or voice communication via a computer or terminal controlled by a user. On the other hand, in recent years, there is an increasing market demand for realizing machine-to-machine communication (M2M) that occurs without user intervention. Accordingly, efforts are being actively made to support existing inter-object communication (hereinafter, may be mixed with M2M communication) by changing an existing broadband mobile communication system.

One of the main considerations in the communication between things is to minimize the power consumption of the terminal. To this end, a terminal supporting inter-object communication (hereinafter, may be mixed with an M2M terminal) may reduce power consumption by entering an idle mode immediately after a network connection. Subsequently, when data to be transmitted in the uplink occurs, the M2M terminal transitions to an active mode by performing a network reconnection procedure and may transmit uplink data.

However, due to the nature of communication between things, the data transmitted by the M2M terminals is a very small unit of data. If a network reconnection procedure is performed each time to transmit a small unit of data, more power may be consumed.

An object of the present invention is to provide an uplink data transmission method in a broadband mobile communication system.

In a mobile communication system according to an aspect of the present invention, a method for transmitting uplink data by a terminal does not access a network, a group identifier assigned to each terminal group to which the terminal belongs, when data to be transmitted uplink is generated in the idle mode. Transmitting a ranging request message including at least one of a non-access indicator and uplink data indicating to transmit uplink data in a state, and a ranging response confirming that the uplink data has been successfully transmitted Receiving a message from the base station.

In a method for receiving uplink data by a base station in a mobile communication system according to an aspect of the present invention, a group identifier assigned to each terminal group to which a terminal belongs, and a non-access transmission instructing to transmit uplink data without being connected to a network. Receiving a ranging request message including at least one of an indicator and uplink data, recognizing that the uplink data is to be transmitted in a state in which the terminal is not connected to the network through the connectionless access indicator; Delivering the group identifier and the uplink data to a service providing server corresponding to the group identifier, receiving the terminal specific terminal identifier from the service providing server, and using the terminal identifier to the terminal. Uplink data was successfully transferred Stating that transmitting the ranging response message.

In a mobile communication system according to an aspect of the present invention, a method for identifying a terminal by a service providing server includes receiving a group identifier assigned to each terminal group to which a terminal belongs and uplink data encrypted with an encryption key corresponding to the group identifier. The method may include: decrypting the uplink data using the encryption key, obtaining a terminal identifier unique to the terminal from the decrypted uplink data, and transmitting the terminal identifier to the base station.

A terminal for use in a mobile communication system according to an aspect of the present invention includes a radio frequency (RF) unit; And a processor, wherein, when data to be transmitted to the uplink is generated in the idle mode, the processor is a group identifier assigned to each terminal group to which the terminal belongs, and a non-connection indicating to transmit uplink data without being connected to the network. And transmitting a ranging request message including at least one of a transmission indicator and uplink data to the base station, and receiving a ranging response message from the base station confirming that the uplink data has been successfully transmitted.

According to a feature of the present invention, an M2M terminal in idle mode may transmit uplink data without a network reconnection procedure. Accordingly, power consumption of the M2M terminal can be reduced. Service-based data distribution is also possible in the network aspect, which reduces the manufacturing cost of a gateway or platform that provides M2M service.

1 is a flowchart illustrating an example of a method of transmitting uplink data by a terminal in a broadband mobile communication system.
2 is a flowchart illustrating a method of transmitting uplink data by an M2M terminal in a mobile communication system according to an embodiment of the present invention.
3 is a network environment supporting an uplink data transmission procedure of an M2M terminal according to an embodiment of the present invention.
4 is a network environment supporting an uplink data transmission procedure of an M2M terminal according to another embodiment of the present invention.
5 illustrates a terminal, a base station, and a server that can be applied to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

Throughout the specification, a mobile station (MS) is a terminal, a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), an access terminal (access) It may refer to a terminal (AT), a user equipment (UE), or the like, and may include all or some functions of the terminal, MT, SS, PSS, AT, UE, and the like.

In addition, the base station (BS) is a node B (eB), an evolved node B (eNodeB), an access point (AP), a radio access station (radio access station (RAS)), a base transceiver station may refer to a base transceiver station (BTS), a mobile multihop relay (MMR) -BS, or the like, and may include all or a part of functions of a NodeB, an eNodeB, an AP, a RAS, a BTS, an MMR-BS, and the like.

1 is a flowchart illustrating an example of a method of transmitting uplink data by a terminal in a broadband mobile communication system. It is assumed that the terminal is in idle mode and there is data to be transmitted in the uplink. In this case, the terminal transmits uplink data after performing a network reconnection procedure.

Referring to FIG. 1, the terminal transmits a ranging code for uplink band allocation and uplink synchronization to a base station (S100).

The base station receiving the ranging code interprets the ranging code. If the ranging code is correctly interpreted, the base station transmits a ranging confirmation (AAI-RNG-ACK, Advanced Air Interface-Ranging-Acknowledgement) message to the terminal (S110), and allocates uplink (Uplink, UL) resources to the terminal. (S120). Here, the AAI-RNG-ACK message may be omitted depending on the situation of the base station.

Meanwhile, the terminal transmitting the ranging code continuously checks whether an uplink band is allocated from the base station. When the terminal identifies the uplink band allocated to the terminal, the terminal transmits a ranging request (AAI-RNG-REQ, Advanced Air Interface-Ranging-Request) message to the base station through the allocated uplink band (S130). At this time, the AAI-RNG-REQ message includes an individual identifier assigned by the terminal from the base station when entering the idle mode. The base station can identify the terminal that transmitted the AAI-RNG-REQ message through the individual identifier included in the AAI-RNG-REQ message.

Thereafter, the base station transmits a ranging response (AAI-RNG-RSP, Advanced Air Interface-Ranging-Response) message to the terminal in response to the AAI-RNG-REQ message (S140). The network reconnection procedure between the base station and the terminal may be completed by the base station transmitting an AAI-RNG-RSP message to the terminal. Alternatively, an additional network reconnection procedure may be performed between the base station and the terminal (S150).

When the network reconnection procedure is completed, the terminal performs a normal uplink band request procedure to the base station, and then performs uplink data transmission to the base station (S160).

As such, when the terminal in the idle mode has data to be transmitted in the uplink, the terminal should perform a network reconnection procedure with the base station. When the same protocol is applied to the M2M terminal, since the network reconnection procedure must be performed every time to transmit a small unit of data, power of the M2M terminal is wasted.

Meanwhile, in order to identify the UE in the network reconnection procedure, an individual identifier should be allocated to the UE before the UE enters the idle mode. In the communication between things, consider a large number of M2M terminal, so the length of the individual identifier allocated for the terminal entering the idle mode should be quite long. Since the individual identifier is operated separately from the terminal unique identifier (hereinafter, referred to as the terminal identifier) allocated in the upper layer, there is a problem in terms of overhead. In addition, in order for the base station to identify the terminal through the individual identifier, there is a problem in that a procedure for requesting identification to a specific server in the network to which the individual identifier is allocated is also required.

Hereinafter, an uplink data transmission method of an M2M terminal according to an embodiment of the present invention will be described. In particular, a method of transmitting uplink data without an M2M terminal in idle mode performing a network reconnection procedure is described. To this end, a method of allocating a group identifier for a terminal group including a plurality of M2M terminals without allocating individual identifiers for M2M terminals entering the idle mode is proposed.

2 is a flowchart illustrating a method of transmitting uplink data by an M2M terminal in a mobile communication system according to an embodiment of the present invention.

Referring to FIG. 2, when the M2M terminal is in an idle mode (S200) and data to be transmitted on the uplink is generated (S202), the M2M terminal may have a ranging code for uplink band allocation and uplink synchronization acquisition. Is transmitted to the base station (S204).

The base station receiving the ranging code interprets the ranging code. If the ranging code is correctly interpreted, the base station transmits a ranging confirmation message (AAI-RNG-ACK, Advanced Air Interface-Ranging-Acknowledgement) message to the terminal (S206), and allocates uplink resources for the terminal (S208). . Here, the AAI-RNG-ACK message may be omitted depending on the situation of the base station.

Meanwhile, the terminal transmitting the ranging code continuously checks whether uplink bandwidth is allocated. When the UE identifies the uplink band allocated to the UE, it transmits a ranging request (AAI-RNG-REQ, Advanced Air Interface-Ranging-Request) message to the base station through the allocated uplink band (S210). At this time, the AAI-RNG-REQ message includes a group identifier assigned by the base station when entering the idle mode. Group identifiers are allocated for each terminal group. Here, the terminal group may be configured according to various criteria. For example, the terminal group may be configured in consideration of the geographical location of the terminal, or may be configured in consideration of a subscriber providing a service to the terminal, or may be configured in consideration of a service provided to the terminal, or may be assigned to a unique identifier of the terminal. Can be configured accordingly. The number of terminals belonging to each terminal group may be the same for each group or may be different. One terminal may belong to two or more terminal groups. In one embodiment, the group identifier may be an identifier allocated for each subscriber. That is, a plurality of M2M terminals provided with the service from the same subscriber may be assigned the same group identifier. Here, the subscriber may refer to an entity for providing a specific M2M service to one or more M2M terminals in association with a network provider. For example, if the A company providing the car location service is a subscriber, one group identifier is assigned to the A company. In addition, users who want a car location tracking service will be provided with a car location tracking service from the company A by purchasing the M2M terminal. At this time, all M2M terminals provided with the car location tracking service from the company A are assigned the same group identifier.

The AAI-RNG-REQ message may further include an offline transmission indicator and uplink data indicating to transmit uplink data without accessing the network. Here, the uplink data may be encrypted with an encryption key corresponding to the group identifier. According to an embodiment of the present invention, since the terminal transmits the ranging request message using the group identifier, the base station cannot know which terminal transmitted the ranging request message. In order to solve this problem, the uplink data in the ranging request message may include a unique terminal identifier allocated from a higher layer.

The base station confirms the connectionless access indicator and the group indicator included in the AAI-RNG-REQ message (S212). The base station may recognize that the M2M terminal intends to transmit uplink data without accessing the network through the connectionless access indicator. In addition, the base station can know from which server the M2M terminal is provided with the service through the group identifier.

The base station delivers the group identifier and the uplink data to the server in the network corresponding to the group identifier included in the AAI-RNG-REQ message (S214).

The server, which has received the uplink data from the base station, decrypts the uplink data using an encryption key corresponding to the received group identifier, and obtains raw data (S216). In operation S218, the server acquires a unique terminal identifier included in the real data.

Thereafter, the server transmits an acknowledgment (ACK) message for uplink data transmission to the base station (S220). The ACK message may include a terminal identifier of the M2M terminal included in the uplink data.

The base station receiving the terminal identifier from the server transmits a ranging response (AAI-RNG-RSP, Advanced Air Interface-Ranging-Response) message to the M2M terminal, and informs that uplink data has been normally transmitted (S222). The AAI-RNG-RSP message may be transmitted encrypted with an encryption key corresponding to a unique terminal identifier received from the server.

Accordingly, when the M2M terminal enters the idle mode, it is not necessary to allocate an individual identifier for each M2M terminal. Therefore, it is possible to support a large number of M2M terminal without increasing the size of the identifier assigned when entering the idle mode. In addition, when the M2M terminal in the idle mode is to transmit data in the uplink, it is not necessary to perform the network reconnection procedure.

3 is a network environment supporting an uplink data transmission procedure of an M2M terminal according to an embodiment of the present invention.

Referring to FIG. 3, at least one M2M terminal 100-1, 100-2, 100-2, and at least one base station 200-1, 200-may support a network environment supporting an uplink data transmission procedure of the M2M terminal. 2), the gateway 300 and at least one service providing server (400-1, 400-2).

Here, the M2M terminal 100-1 is an M2M terminal for receiving a vehicle location tracking service, and the M2M terminals 100-2 and 100-3 are M2M terminals for receiving a monitoring service.

The M2M terminals 100-1 and 100-2 may be connected to the base station 200-1 through a wireless section, and the M2M terminal 100-3 may be connected to the base station 200-2 through a wireless section.

The gateway 300 may be, for example, an access service network (ASN) gateway. Several base stations 200-1 and 200-2 may be managed through one ASN gateway 300.

The service providing server 400-1 is a server operated by a subscriber providing a vehicle location tracking service, the service providing server 400-2 is a server operated by a subscriber providing a monitoring service, and each service providing server is independent. It illustrates what is present.

It is assumed that all of the M2M terminals 100-1, 100-2, and 100-3 are in the idle mode and data to be transmitted on the uplink is generated.

The M2M terminal 100-1 sets the group identifier = 1, the connectionless access indicator = 1, and transmits an AAI-RNG-REQ message including uplink data to the base station 200-1.

The M2M terminal 100-2 transmits an AAI-RNG-REQ message including uplink data to the base station 200-1 with the group identifier = 2, the connectionless access indicator = 1, and the uplink data.

The M2M terminal 100-3 sets the group identifier = 2, the connectionless access indicator = 1, and transmits an AAI-RNG-REQ message including uplink data to the base station 200-2.

The base station 200-1, 200-2 receiving the AAI-RNG-REQ message from the M2M terminal 100-1, 100-2, 100-3 transmits a connectionless access indicator included in the AAI-RNG-REQ message = As set to 1, it may be recognized that the M2M terminals 100-1, 100-2, and 100-3 want to transmit uplink data without accessing the network. Accordingly, the base station (200-1, 200-2) ASN the group identifier and uplink data included in the AAI-RNG-REQ message received from the M2M terminal (100-1, 100-2, 100-3), respectively Transfer to the gateway 300.

The ASN gateway 300 determines that the group identifier received from the M2M terminal 100-1 is set to 1, so that the M2M terminal 100-1 is an M2M terminal belonging to a terminal group that receives a vehicle location tracking service. The group identifier and uplink data are transmitted to the service providing server 400-1 providing the vehicle location tracking service.

In addition, since the ASN gateway 300 receives the group identifiers received from the M2M terminals 100-2 and 100-3 to be set to 2, the M2M terminals 100-2 and 100-3 are connected to a terminal group provided with the monitoring service. It is determined that the M2M terminal belongs, and transmits the corresponding group identifier and uplink data to the service providing server 400-2 providing the monitoring service.

The service providing server 400-1 decrypts uplink data received from the M2M terminal 100-1 by using an encryption key corresponding to group identifier = 1 and obtains real data. The service providing server 400-1 transmits the terminal identifier of the M2M terminal 100-1 included in the real data to the base station 200-1. The base station 200-1 identifies the M2M terminal 100-1 by using the terminal identifier received from the service providing server 400-1, and successfully transmits uplink data to the M2M terminal 100-1. AAI-RNG-RSP message indicating that the transmission is transmitted.

 Similarly, the service providing server 400-2 decrypts uplink data received from the M2M terminal 100-2 using an encryption key corresponding to group identifier = 2, and obtains real data. The service providing server 400-2 transmits the terminal identifier of the M2M terminal 100-2 included in the real data to the base station 200-1. The base station 200-1 identifies the M2M terminal 100-2 using the terminal identifier received from the service providing server 400-2, and successfully transmits uplink data to the M2M terminal 100-2. AAI-RNG-RSP message indicating that the transmission is transmitted.

In addition, the service providing server 400-2 decrypts uplink data received from the M2M terminal 100-3 using an encryption key corresponding to group identifier = 2, and obtains real data. The service providing server 400-2 transmits the terminal identifier of the M2M terminal 100-3 included in the real data to the base station 200-2. In addition, the base station 200-2 identifies the M2M terminal 100-3 using the terminal identifier received from the service providing server 400-2, and successfully transmits uplink data to the M2M terminal 100-3. AAI-RNG-RSP message indicating that the transmission is transmitted.

4 is a network environment supporting an uplink data transmission procedure of an M2M terminal according to another embodiment of the present invention.

Referring to FIG. 4, a network environment supporting an uplink data transmission procedure of an M2M terminal may include at least one M2M terminal 100-1, 100-2, 100-2, and at least one base station 200-1, 200-. 2), the gateway 300, the M2M service platform 500 and at least one service providing server (400-1, 400-2).

The network environment illustrated in FIG. 4 is similar to the network environment illustrated in FIG. 3 except for the M2M service platform 500. Therefore, redundant description is omitted.

The M2M service platform 500 is a platform that manages M2M services. Unlike the network environment illustrated in FIG. 3, the M2M service platform 500 processes data transmitted from the M2M terminals 100-1, 100-2, and 100-3.

That is, the base stations 200-1 and 200-2 are connected to the M2M terminal 100-from the connectionless access indicator included in the AAI-RNG-REQ message transmitted from the M2M terminals 100-1, 100-2, and 100-3. 1, 100-2, and 100-3 may recognize that they want to transmit uplink data without accessing the network.

Accordingly, the base station 200-1, 200-2 transmits the group indicator and uplink data included in the AAI-RNG-REQ message transmitted from the M2M terminal 100-1, 100-2, and 100-3 to the ASN gateway. It passes through the 300 to the M2M service platform 500. Similar to the ASN gateway 300 in FIG. 3, the M2M service platform 500 forwards the group identifier and uplink data to the appropriate service providing servers 400-1 and 400-2 based on the received group identifier. do.

As such, the ASN gateway 300 or the M2M service platform 500 transfers uplink data to the appropriate service providing servers 400-1 and 400-2 using the group identifier, and the service providing server 400-1, 400-2) may identify the terminal using the information included in the group identifier and uplink data. Accordingly, even when the M2M terminal enters the idle mode, the ASN gateway 300 or the M2M service platform 500 does not need to separately store individual identifiers of the M2M terminal. Therefore, the memory size of the ASN gateway 300 or the M2M service platform 500 can be reduced, and the product cost can be lowered.

In this specification, one service providing server is operated for each subscriber and a group identifier is assigned to each service providing server as an example. However, the technical idea of the present invention is not limited thereto. That is, two or more service providing servers may be operated to provide the same service for each subscriber, and a group identifier may be allocated to each service providing server. Two or more subscribers operate one service providing server, and a group identifier may be assigned to each subscriber. In addition to this may be implemented in various embodiments.

5 illustrates a terminal, a base station, and a server that can be applied to an embodiment of the present invention.

Referring to FIG. 5, the mobile communication system includes a terminal 100, a base station 200, and a service providing server 400. The terminal 100, the base station 200, and the service providing server 400 may each include a processor 110, 210, 410, memory 120, 220, 420, and a radio frequency (RF) unit 130, 230, 430). Processors 110, 210, and 410 may be configured to implement the procedures and / or methods proposed in the present invention. The memories 120, 220, and 420 are connected to the processors 110, 210, and 410 and store various information related to the operation of the processors 110, 210, and 410. The RF unit 130, 230, 430 is connected to the processors 110, 210, 410 and transmits and / or receives radio signals. The base station 200 and / or the terminal 100 may have a single antenna or multiple antennas.

The embodiments of the present invention described above are not only implemented through the apparatus and the method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiments of the present invention or a recording medium on which the program is recorded.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (12)

In a method for transmitting uplink data by a terminal in a mobile communication system,
When data to be transmitted on the uplink in the idle mode occurs, at least one of a group identifier assigned to each terminal group to which the terminal belongs, a non-connection transmission indicator indicating uplink data to be transmitted without being connected to the network, and uplink data Transmitting a ranging request message to the base station;
Receiving a ranging response message from the base station confirming that the uplink data has been successfully transmitted
≪ / RTI > The method of claim 1,
And the uplink data is encrypted with an encryption key corresponding to the group identifier. The method of claim 1,
The uplink data includes terminal identifier information which is a terminal unique identifier allocated from an upper layer. The method of claim 1,
The terminal group includes at least one terminal associated with an entity providing a predetermined M2M service. The method of claim 1,
The ranging request message is transmitted through an allocated uplink resource after the terminal transmits a ranging code to the base station. In the mobile communication system, a base station receives uplink data,
Receiving a ranging request message including at least one of a group identifier assigned to each terminal group to which a terminal belongs, a non-connection transmission indicator indicating to transmit uplink data without access to a network, and uplink data;
Recognizing that the terminal intends to transmit the uplink data without accessing the network through the connectionless access indicator;
Transmitting the group identifier and the uplink data to a service providing server corresponding to the group identifier,
Receiving a terminal identifier unique to the terminal from the service providing server, and
Transmitting a ranging response message indicating that the uplink data has been successfully transmitted to the terminal using the terminal identifier;
≪ / RTI > The method of claim 6,
The terminal identifier is included in the uplink data, and the uplink data is decrypted with an encryption key corresponding to the group identifier. The method of claim 6,
And the ranging response message is encrypted and transmitted with an encryption key corresponding to the terminal identifier. The method of claim 6,
Receiving a ranging code from a terminal in an idle mode,
Interpreting the ranging code, and
Allocating an uplink resource to which the ranging request message is to be transmitted if the range code is normally interpreted
≪ / RTI > A method for identifying a terminal by a service providing server in a mobile communication system,
Receiving uplink data encrypted with a group identifier assigned to each terminal group to which the terminal belongs and an encryption key corresponding to the group identifier from the base station;
Decrypting the uplink data using the encryption key;
Obtaining a terminal identifier unique to the terminal from the decoded uplink data, and
Transmitting the terminal identifier to the base station
≪ / RTI > The method of claim 10,
The terminal identifier is associated with an entity providing a predetermined M2M service. In the terminal for use in a mobile communication system,
A radio frequency (RF) unit; And
Includes a processor,
When data to be transmitted to the uplink is generated in the idle mode, the processor assigns a group identifier assigned to each terminal group to which the terminal belongs, and a non-connection transmission indicator and uplink data indicating to transmit uplink data without being connected to the network. The terminal is configured to transmit a ranging request message including at least one of the at least one of the ranging response message from the base station to confirm that the uplink data has been successfully transmitted.

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