KR100897452B1 - Method of entering preservation mode in a mobile communicatin terminal during multi radio access bearer service - Google Patents

Abstract

The method of entering a storage mode of a mobile communication terminal in a multi-radio access bearer service includes releasing a radio bearer of a radio access bearer service not used for a predetermined time; When the radio bearers of all the connected radio access bearer services are released, the mobile terminal itself releases an RRC (Radio Resource Control) connection with the mobile communication network to enter a preservation mode. When all the services connected in the mobile communication terminal supporting the multiple radio access bearer service are not used for a predetermined time, the mobile communication terminal enters the auxiliary mode by itself, thereby reducing radio resource waste and reducing current consumption.

Description

How to enter preservation mode of mobile communication terminal in multi-radio access bearer service {METHOD OF ENTERING PRESERVATION MODE IN A MOBILE COMMUNICATIN TERMINAL DURING MULTI RADIO ACCESS BEARER SERVICE}

1 is a block diagram of a general mobile communication terminal.

2 is a conceptual diagram illustrating a general WCDMA radio protocol.

3 is a block diagram illustrating a general mobile communication terminal and a mobile communication network.

4 is a flowchart illustrating a process of releasing one radio access bearer (RAB) after a multi-service connection according to an embodiment of the present invention.

5 is a flowchart illustrating a procedure of entering a preservation mode in the mobile communication terminal itself according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: mobile communication terminal 310: wireless access network

The present invention relates to a preservation mode entry method of a mobile communication terminal, and more particularly, to a preservation mode entry method of a wireless mobile communication terminal in a multi-radio access bearer service in a WCDMA network.

The conventional 3rd Generation Partnership Project (3GPP) Wideband Code Division Multiple Access (WCDMA) standard supports a multi-radio access bearer service. In particular, the conventional 3GPP WCDMA standard supports up to three PS (packet switched) data calls to support concurrent services.

For example, while receiving Video On Demand (“VOD”) streaming service, it may connect to a multimedia messaging service (“MMS” for short) and send multi-mail. It can also access a MULTIPACK service or a wireless Internet service.

Each application service corresponds to each radio access bearer (abbreviated as "RAB") or radio bearer (abbreviated as "RB"). Since each RAB or RB has a unique identifier (ID), it can be independently released for each RAB or RB between the mobile communication network and the mobile communication terminal.

If there is no transmission of a specific packet session for a certain time for efficient operation of radio network resources, the mobile communication terminal enters a preservation mode regardless of RRC (Radio Resource Control) status.

The mobile communication terminal turns off the radio (RF) terminal of the mobile communication terminal in the conservation mode and activates only a PDP (Packet Data Protocol) context.

In the related art, a preservation mode is set by the mobile communication network for each service.

However, there is no method for individually setting the protection mode for each service by the mobile communication terminal itself. Therefore, when a mobile communication terminal misses a radio bearer (RB) release message by a preservation timer from a mobile communication network, when a mobile subscriber simultaneously accesses a plurality of services, there is a service that is not used for a predetermined time. Radio resources can be wasted in this process.

In particular, when the mobile communication terminal misses the RB release message by the preservation timer from the mobile communication network, the mobile communication subscriber does not use all of the plurality of services for a predetermined time after simultaneously accessing the plurality of services. Radio resources are wasted, preventing them from entering conservation mode.

As a result, by continuously turning on the radio (RF) terminal of the mobile communication terminal, it is possible to bring about SAR exposure and battery consumption. In the end, the waste of radio resources may adversely affect the call connection rate and the quality of service (QoS) of the mobile communication terminal.

Accordingly, an object of the present invention is to provide a method for entering a conservation mode of a mobile communication terminal in a multiple radio access bearer service capable of entering the conservation mode by the mobile terminal itself in a multiple radio access bearer service.

According to an aspect of the present invention, a method for entering a storage mode of a mobile communication terminal in a multi-radio access bearer service according to an aspect of the present invention provides a radio access bearer that is not used for a predetermined time ( Releasing a radio bearer of a radio access bearer service, and when the radio bearers of all connected radio access bearer services are released, the mobile terminal itself connects to a radio resource control (RRC) with the mobile communication network; And releasing the device to enter a preservation mode. The step of releasing a radio bearer of a radio access bearer service not used for the predetermined time may include driving a first timer inside the mobile communication terminal, and operating the radio access bearer. If there is no state change in a bearer service, the method may include terminating the first timer and releasing the radio bearer of the radio access bearer service. The step of releasing a radio resource control (RRC) connection with the mobile communication network by itself and entering a preservation mode may include receiving a measurement control message including a traffic threshold from the mobile communication network; Measuring a traffic volume for a predetermined time in response to the measurement control message; and disconnecting an RRC (Radio Resource Control) connection with the mobile communication network when the amount of traffic measured for the predetermined time is less than or equal to the traffic threshold. And entering a preservation mode. The entering of the retention mode may include operating a second timer inside the mobile communication terminal when the measured traffic amount is less than or equal to the traffic threshold, and after the second timer expires after a predetermined time, RRC (Radio Resource Control) Transmitting an RRC disconnection request message for requesting disconnection to the mobile communication network; and transmitting an RRC disconnection completion message to the mobile communication network in response to the RRC disconnection message received from the mobile communication network. And entering a state.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar elements.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. And / or the like includes a combination of a plurality of related items or any item of a plurality of related items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

In describing the drawings, similar reference numerals are used for similar components.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention. Hereinafter, the same reference numerals are used for the same components in the drawings, and duplicate descriptions of the same components are omitted.

1 is a block diagram of a general mobile communication terminal, FIG. 2 is a conceptual diagram showing a general WCDMA wireless protocol, and FIG. 3 is a block diagram showing a general mobile communication terminal and a mobile communication network.

Referring to FIG. 1, the mobile communication terminal 100 includes a modem unit 110, a radio (RF) transmitter 120, a radio (RF) receiver 130, a duplexer and an antenna 150. The modem unit 110 may include a modem controller 112, a transmission data processor 114 that processes data and signaling for uplink, a modulator 115 that spreads and modulates an output of the transmission data processor 114, and radio (RF). A demodulator 117 for despreading and demodulating the signal received from the receiver 130 and a reception data processor 116 for deinterleaving and decoding the output of the demodulator 117.

The radio (RF) transmitter 120 converts the output data stream of the modulator 115 into an analog signal, amplifies and filters the frequency upconverting to generate an uplink signal. The uplink signal is routed through the duplexer 140 and transmitted to the mobile communication network through the antenna 150. The RF receiver 130 filters, amplifies, and downconverts a signal received through the antenna 150 and the duplexer 140 and converts the signal into a digital signal.

Referring to FIG. 2, the WCDMA radio protocol includes a physical layer 210, a medium access control (MAC) layer 220, a radio link control (RLC) layer 230, and a radio resource control (RRC) layer 240. ), Mobility Management (MM) layer 250, General Packet Radio Service (GPRS) Mobility Management (GMM) layer 252, Call Control (CC) layer 260, and Session Management (SM) layer 262. do.

Functions of the physical layer 210 include RF signal processing, spreading, modulation, coding, decoding, power control, and soft handoff processing. In the upper layer, information is transmitted to the physical layer 210 through the medium access control (MAC) layer 220, and the RLC connection establishment and the RLC connection release are performed by the RLC layer 230.

All control signaling from or to the user is carried through the RRC layer 240. The RRC layer 240 determines which radio resource should be allocated to a user and is responsible for radio resource management. Specifically, the RRC layer 240 establishes an initial RRC connection used for initial signaling transmission between a mobile communication terminal and a mobile communication network for the purpose of allocating and managing radio resources, and RB (radio for transmission of user data). assigns a bearer to the terminal, determines when a call is to be handed off, performs cell reselection, and performs a measurement report that determines when to be measured and how to be reported.

In particular, the RRC layer 240 may set, change, and release an RB in response to a request of a higher layer. The RRC layer 240 may set up one or more RBs simultaneously to support concurrent services such as VOD streaming service, MMS service and wireless Internet service. That is, the RRC layer 240 may set the RB for each service at the same time. Each service corresponds to a respective RB, and each RB has a unique identifier (ID).

The MM layer 250 and the CC layer 260 provide mobility management, call setup, and call release (UE) of a mobile communication terminal (UE) to provide a function for allowing a user to make a mobile call. It is in charge of call control service such as call release.

The GMM layer 252 and the SM layer 262 perform packet management (PS) related mobility management and session management services such as PDP context activation, deactivation, and modification.

When the RRC layer of a specific mobile terminal and the RRC layer of a radio access network (Random Access Network or UMTS Terrestrial RAN) are connected to each other to send and receive RRC messages, the mobile terminal is in an RRC connected mode. If not, the mobile communication terminal is in an idle mode.

According to the Wideband Code Division Multiple Access (WCDMA) standard of the 3rd Generation Partnership Project (3GPP), when there is no transmission of a specific packet session for a certain time for efficient operation of radio network resources, the mobile communication terminal uses RRC (Radio Resource Control) by WCDMA network. Enter preservation mode regardless of the state.

When a conventional mobile communication terminal does not receive a radio bearer release message by a preservation timer from a WCDMA network, all the services are used for a predetermined time after the mobile subscriber simultaneously accesses a plurality of services. If not, you will not be able to enter retention mode. As a result, radio resources are wasted.

Even if the mobile communication terminal of the present invention does not receive a radio bearer release message by a preservation timer from a WCDMA network, all the services are operated for a predetermined time after the mobile subscriber simultaneously accesses a plurality of services. If it is not used, the mobile communication terminal detects this and releases the RBs of services not used by the mobile communication terminal itself and enters a conservation mode.

Hereinafter, a method for automatically entering a preservation mode in a wireless mobile communication terminal after accessing a multi-service in a mobile communication terminal of the present invention will be described in detail.

4 is a flowchart illustrating a process of releasing one radio access bearer (RAB) after a multi-service connection according to an embodiment of the present invention.

Hereinafter, the mobile communication network will be described taking the WCDMA network as an example. The mobile communication system includes a base station 312, a base station controller 314, an exchange 330, and the like, as shown in FIG. Here, the base station 312 and the base station controller 314 constitute a radio access network (Random Access Network or UMTS Terrestrial RAN, 310).

Hereinafter, assuming that three PS RABs are set up for three services of VOD streaming service (service A), MMS service (service B), and wireless Internet service (service C), respectively. Put inactivity timers A, B, and C on services.

The RRC layer 240 may set, change, and release an RB in response to a request of a higher layer. The RRC layer 240 may establish one or more RBs at the same time to support concurrent services such as VOD streaming service, MMS service, and wireless Internet service. That is, the RRC layer 240 may set the RB for each service at the same time. Each service corresponds to a respective RB, and each RB has a unique identifier (ID).

Referring to FIG. 4, first, three services A, B, and C are simultaneously activated to enter a PS switched state (step 401). Each service A, B, C corresponds to each RB, and each RB has a unique identifier (ID) RAB_id A, RAB_id B, and RAB_id C.

 For example, if the A service is no longer operated (step 403), then the inactivity timer A1 in the mobile communication terminal is driven from there (step 405). It is determined whether there is a change in the A service state before the inactivity timer A1 is expired (step 407). A change in the state of the A service indicates a case in which a corresponding key event from a user occurs and the service A is continuously used.

If there is a change in the A service state before the inactivity timer A1 expires, the inactivity timer A1 is reset to zero again and the service A is continued (step 409).

If there is no change in the service A state until the inactivity timer A1 expires, the inactivity timer A1 is terminated (step 411).

After the inactivity timer A1 expires, the mobile communication terminal releases the radio bearer ID corresponding to the service of the corresponding RAB A according to the RB Release procedure defined in 3GPP. Specifically, after the inactivity timer A1 expires, the mobile communication terminal transmits an RB Release Request message for RAB A to the radio access network 310 of the mobile communication network (step 413). Upon receiving the RB Release Request Message, the radio access network 310 transmits the RB Release message to the mobile communication terminal (step 415). The mobile communication terminal receiving the RB Release message transmits the RB Release Complete message to the radio access network 310 (step 417).

 As a result, RAB A is released and RAB B and C remain PS connected (step 419).

Although not shown in FIG. 4, other B and C services may be independently operated by terminating the inactivity timer and releasing the radio bearer RB when there is no change in each service state in the same manner as described in FIG. 4. Release it.

When the service state is unchanged for all the services A, B, and C in the multi-service, and the radio bearer (RB) is released for all the services A, B, and C, it is possible to enter the preservation mode under a predetermined condition. Let's do it.

By doing so, all the services except for the current service can be entered into the preservation mode when the radio bearer (RB) is released because there is no change in the service state.

Hereinafter, a process of entering a preservation mode when all other services except for the current service are unchanged in the service state and the radio bearer RB is released will be described with reference to FIG. 5.

5 is a flowchart illustrating a procedure of entering a preservation mode in the mobile communication terminal itself according to an embodiment of the present invention.

If the radio bearer (RB) is released according to the procedure of FIG. 4 for all services while performing the multi-service, the mobile communication terminal 100 automatically enters a preservation mode when there is no packet data transmission for a predetermined time. Enter.

Referring to FIG. 5, the mobile communication terminal 100 receives a measurement control message (Measurement Control) from the radio access network 310 according to the 3GPP standard (step 501). The measurement control message may include an event 4A related parameter and a reporting threshold.

The mobile communication terminal 100 measures the transmission amount of the packet data, that is, the traffic amount, for a predetermined time after the data call is connected according to the 3GPP standard (step 503).

The mobile communication terminal 100 determines whether the measured packet data transmission amount, that is, the traffic amount measurement value, is equal to or less than a threshold of the traffic amount included in the measurement control message (step 505).

As a result of the determination, when the traffic volume measurement is less than or equal to the threshold, a measurement report message including a traffic volume measurement is transmitted to the radio access network 310 (step 507). The measurement report message may include an event 4A related parameter and a traffic volume measurement.

If the traffic amount measurement value is larger than the threshold of the traffic amount included in the measurement control message, the mobile communication terminal 100 returns to step 503 to perform the traffic amount measurement.

The mobile communication terminal 100 transmits a measurement report message to the radio access network 310 when the traffic measurement is less than or equal to the threshold of the traffic amount included in the measurement control message, and a timer in the mobile communication terminal 100. Timer) Drives A2 (step 509). The timer A2 inside the mobile communication terminal 100 expires after a predetermined time elapses (step 511). The predetermined time may be, for example, 30 seconds or 60 seconds, and may be variously changed.

After the timer A2 expires, the mobile communication terminal 100 releases an RRC (Radio Resource Control) connection according to the 3GPP standard and enters a conservation mode.

In detail, the mobile communication terminal 100 transmits an RRC connection release request message to the radio access network 310 of the mobile communication network to request an RRC connection release (step 513).

The radio access network 310 receives an RRC connection release request message and transmits an RRC connection release message due to UE-Inactivity to the terminal (step 515).

The mobile communication terminal 100 transmits an RRC connection release complete message to the radio access network 310 in response to the RRC connection release message (step 517).

The mobile communication terminal 100 and the radio access network 310 enter the conservation mode state in response to the RRC disconnection complete message (step 519).

In the preservation mode, the radio (RF) transceiver of the mobile communication terminal 100 is turned off and only a PDP (Packet Data Protocol) context is activated. When the mobile terminal receives a paging on the mobile network after entering the preservation mode, or when the user of the mobile terminal presses a key for accessing a data call, the mobile terminal returns to normal data through an RRC connection. The call is processed.

According to the method of entering the storage mode of the mobile communication terminal in the multi-radio access bearer service as described above, if the mobile communication terminal detects a service not used for a certain time after accessing the multi-service, the mobile terminal moves. After releasing the radio bearer of the service not used by the communication terminal itself, when the radio bearer of all the multi services is released, the mobile terminal itself enters the conservation mode.

Therefore, when all the services connected in the mobile communication terminal supporting the multiple radio access bearer service are not used for a predetermined time, the mobile communication terminal itself enters the auxiliary mode, thereby reducing the waste of radio resources.

In addition, the current consumption can be reduced by turning off the radio (RF) transmitting and receiving terminal of the mobile communication terminal in the conservation mode.

Although described with reference to the embodiments above, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the invention as set forth in the claims below. Could be.

Claims (4)

In the mobile communication terminal, Releasing a radio bearer of a radio access bearer service not used for a predetermined time; And When the radio bearers of all connected radio access bearer services are released, if the traffic volume with the mobile communication network is less than or equal to a predetermined traffic threshold, the mobile communication terminal releases and preserves a radio resource control (RRC) connection with the mobile communication network. A method for entering a conservation mode of a mobile communication terminal in a multi radio access bearer service, comprising entering a preservation mode. The method of claim 1, wherein releasing a radio bearer of a radio access bearer service that is not used for the predetermined time. Driving a first timer inside the mobile communication terminal; Terminating the first timer if there is no state change in the Radio Access Bearer service; And Entering the preservation mode of the mobile communication terminal in the multi-radio access bearer service, characterized by releasing the radio bearer of the radio access bearer service. Way. The method of claim 1, wherein the mobile communication terminal releases a radio resource control (RRC) connection with the mobile communication network and enters a preservation mode. Receiving a measurement control message including the traffic volume threshold from the mobile communication network; Measuring a traffic amount for a predetermined time in response to the measurement control message; And When the amount of traffic measured during the predetermined time is less than or equal to the traffic threshold, releasing a radio resource control (RRC) connection with the mobile communication network, and entering the preservation mode. A method for entering a conservation mode of a mobile terminal in a multi radio access bearer service. The method of claim 3, wherein entering the retention mode Operating a second timer in the mobile communication terminal when the measured traffic amount is less than or equal to the traffic threshold; Transmitting an RRC connection release request message to the mobile communication network to request RRC connection release after the second timer expires after a predetermined time; And And transmitting the RRC connection release complete message to the mobile communication network in response to the RRC connection release message received from the mobile communication network to enter the conservation mode state. How to enter the conservation mode of the mobile communication terminal in the (Service).

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