KR20170016672A - The Apparatus and Method for performing of service request procedure in a wireless communication system - Google Patents

Abstract

The present disclosure relates to a method for performing a service request procedure in a wireless communication system. At this time, the service request procedure is a step of establishing a connected mode in which the UE is connected to the network, transmitting a service request request message when there is data to be transmitted to the network and the radio resource is not allocated Initiating the service request procedure and terminating the service request procedure. At this time, the service request procedure may be terminated based on any one of receiving the service request response message and allocating the radio resource based on the radio resource and the first procedure.

Description

[0001] The present invention relates to a method and apparatus for performing a service request procedure in a wireless communication system,

BACKGROUND 1. Technical Field The present disclosure relates to wireless communication systems, and more particularly, to a method and apparatus for performing a service request procedure in a wireless communication system.

As a wireless communication system, the present invention can be applied to a Universal Mobile Telecommunications System (UMTS). The details of the technical specification of UMTS are disclosed in "3rd Generation Partnership Project (Technical Specification Group Radio Access Network)" .

Referring to FIG. 1, a UMTS includes a User Equipment (UE), a UMTS Terrestrial Radio Access Network (UTRAN), and a Core Network (CN). UTRAN is composed of one or more radio network subsystems (RNS), and each RNS includes one radio network controller (RNC) and one or more base stations (Node B) managed by the RNC . One base station may have more than one cell.

Also, the present invention can be applied to Enhanced-Universal Mobile Telecommunications System (E-UMTS). At this time, the E-UMTS is also called an LTE (Long Term Evolution) system. It can also be applied to other communication systems as well. Hereinafter, the configuration of the present invention will be described based on UMTS, but the present invention is not limited to UMTS.

The present specification is intended to provide a method and apparatus for performing a service request procedure in a wireless communication system.

It is an object of the present disclosure to provide a method for determining when a service request procedure is terminated based on a radio resource allocation request in a wireless communication system.

It is an object of the present invention to provide a method for improving radio resource use efficiency by preventing unnecessary signal transmission by terminating a service request procedure according to a radio resource allocation state in a wireless communication system.

According to an embodiment of the present invention, there is provided a method for a terminal performing a service request procedure in a wireless communication system, the method comprising: establishing a connected mode in which a terminal is connected to a network; And if the radio resource is not allocated, transmitting a service request request message to start a service request procedure, and terminating the service request procedure. At this time, the service request procedure may be terminated based on either a case where the service request response message is received, a radio resource is allocated, and a case where radio resources are allocated based on the first procedure.

In addition, according to an embodiment of the present disclosure, a terminal apparatus that performs a service request procedure in a wireless communication system may be included. The terminal device may include a receiving module for receiving a message from an external device, a transmitting module for transmitting a message to an external device, and a processor for controlling the receiving module and the transmitting module. At this time, the processor sets a connected mode connected to the network, and if there is data to be transmitted to the network, and a radio resource is not assigned, the processor transmits a service request request message through the transmission module, Start the request procedure, and terminate the service request procedure. At this time, the service request procedure may be terminated based on either a case where the service request response message is received, a radio resource is allocated, and a case where radio resources are allocated based on the first procedure.

In addition, a method of performing a service request procedure in a wireless communication system and a terminal device may be applied in common.

According to an embodiment of the present disclosure, the first procedure may be any one of a location registration procedure and a PDP context activation procedure.

Further, according to an embodiment of the present specification, when the first procedure is performed, it may be determined whether to continue performing the service request procedure based on the first procedure performed. At this time, if radio resource allocation is completed based on the first procedure, the service request procedure can be terminated. On the other hand, if the radio resource allocation is not completed based on the first procedure, and the radio resource allocation is further required, the service request procedure can be maintained.

Further, according to one embodiment of the present disclosure, when radio resource allocation is completed based on the first procedure, the network may not transmit a service request response message. In this case, if the first procedure is a PDP context activation procedure, the network may transmit a service request response message (PDP context response) if PDP context status synchronization is required even if the radio resource assignment is completed based on the first procedure Can be transmitted.

The present specification can provide a method and apparatus for performing a service request procedure in a wireless communication system.

The present specification can provide a method for determining when a service request procedure is terminated based on a radio resource allocation request in a wireless communication system.

The present specification can provide a method for improving the radio resource use efficiency by preventing unnecessary signal transmission by terminating the service request procedure according to the radio resource allocation state in the wireless communication system.

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

1 is a diagram conceptually illustrating a network structure of a UMTS according to an embodiment of the present invention.
2 is a diagram showing a structure of a wireless protocol used in UMTS.
3 is a diagram illustrating an example of a physical channel structure used in a UMTS system according to an embodiment of the present invention.
FIG. 4 is a diagram illustrating a structure of a NAS (Non Access Stratum) layer according to an embodiment of the present invention.
5 is a diagram illustrating a method for performing a service request procedure according to an embodiment of the present invention.
6 is a diagram illustrating a method of allocating radio resources in case of a conflict between a service request procedure and a location registration procedure according to an embodiment of the present invention.
7 is a diagram illustrating a method of allocating radio resources in case of a conflict between a service request procedure and a location registration procedure according to an embodiment of the present invention.
FIG. 8 is a diagram illustrating a method of allocating radio resources when a service request procedure and a PDP context activation procedure conflict according to an embodiment of the present invention.
9 is a diagram illustrating a method of allocating radio resources in case of a conflict between a service request procedure and a PDP context activation procedure according to an embodiment of the present invention.
10 is a diagram illustrating a method of allocating radio resources based on a service request procedure according to an embodiment of the present invention.
11 is a diagram illustrating a method for allocating radio resources based on a service request procedure according to an embodiment of the present invention.
12 is a flowchart illustrating a method of performing a service request procedure according to an embodiment of the present invention.
13 is a block diagram of a terminal device according to an embodiment of the present invention.

Hereinafter, preferred embodiments according to 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, those skilled in the art will appreciate that the present invention may be practiced without these specific details.

The following embodiments are a combination of elements and features of the present invention in a predetermined form. Each component or characteristic may be considered optional unless otherwise expressly stated. Each component or feature may be implemented in a form that is not combined with other components or features. In addition, some of the elements and / or features may be combined to form an embodiment of the present 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.

The specific terminology used in the following description is provided to aid understanding of the present invention, and the use of such specific terminology may be changed into other forms without departing from the technical idea of the present invention.

In some instances, well-known structures and devices are omitted or shown in block diagram form around the core functions of each structure and device in order to avoid obscuring the concepts of the present invention. In the following description, the same components are denoted by the same reference numerals throughout the specification.

Embodiments of the present invention may be supported by standard documents disclosed in at least one of IEEE 802 systems, 3GPP systems, 3GPP LTE and LTE-Advanced (LTE-Advanced) systems and 3GPP2 systems, which are wireless access systems. That is, the steps or portions of the embodiments of the present invention that are not described in order to clearly illustrate the technical idea of the present invention can be supported by the documents. In addition, all terms disclosed in this document may be described by the standard document.

The following description will be made on the assumption that the present invention is applicable to a CDMA system such as Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access And can be used in various radio access systems. CDMA may be implemented in radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. The TDMA may be implemented in a wireless technology such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA may be implemented in wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and Evolved UTRA (E-UTRA).

Furthermore, the terms first and / or second, etc. may be used herein to describe various components, but the components should not be limited by the terms. The terms may be named for the purpose of distinguishing one element from another, for example, without departing from the scope of the rights under the concept of the present disclosure, the first element being referred to as the second element, , The second component may also be referred to as a first component.

Also, throughout the specification, when an element is referred to as " including " an element, it means that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise. And the description "... unit", "… Quot; and " part " refer to a unit for processing at least one function or operation, which may be implemented as a combination of hardware and / or software.

2 is a diagram showing a structure of a wireless protocol used in UMTS.

The radio protocol layers exist in pairs in the UE and the UTRAN, and are responsible for data transmission in the radio section. To describe each of the wireless protocol layers, the PHY layer (or physical layer) as the first layer transmits data to the wireless section using various wireless transmission techniques. The PHY layer is responsible for reliable data transmission over the wireless section. The PHY layer and the MAC layer, which is an upper layer, are connected through a transport channel. The transport channel is classified into a dedicated (Dedicated) transport channel and a common transport channel depending on whether the channel is shared.

In the second layer, MAC (Medium Access Control), RLC (Radio Link Control), PDCP (Packet Data Convergence Protocol), and BMC (Broadcast / Multicast Control) layers exist. First, the MAC layer maps various logical channels to various transport channels, and also performs logical channel multiplexing in which a plurality of logical channels are mapped to one transport channel. The MAC layer is connected to an RLC layer, which is an upper layer, through a logical channel. A logical channel includes a control channel for transmitting control plane information according to the type of information to be transmitted, And a traffic channel for transmitting information of a user plane (User Plane).

The MAC layer includes a MAC-b sublayer, a MAC-d sublayer, a MAC-c / sh sublayer, a MAC-hs / ehs sublayer, and a MAC- Or a MAC-i / is sublayer. The MAC-c sublayer controls the BCH (Broadcast Channel), which is a transport channel responsible for broadcasting system information. The MAC-c / sub sublayer controls the Forward Access Channel (FACH) ), And the MAC-d sublayer manages a dedicated channel (DCH) or a dedicated E-DCH (Enhanced Dedicated Channel), which is a dedicated transport channel for a specific UE. The MAC-hs / ehs sub-layer manages HS-DSCH (High Speed Downlink Shared Channel), which is a transmission channel for high-speed downlink data transmission, in order to support high-speed data transmission in both downward and upward directions. The MAC / is sub layer manages an Enhanced Dedicated Channel (E-DCH), which is a transmission channel for high-speed uplink data transmission.

The RLC layer is responsible for guaranteeing the QoS of each radio bearer (RB) and transmitting the data accordingly. The RLC has one or two independent RLC Entities for each RB in order to guarantee the QoS inherent to the RB. In order to support various QoS, the RLC has a Transparent Mode (UM), an Unacknowledged Mode (UM) And AM (Acknowledged Mode). The RLC also plays a role of adjusting the size of the data so that the lower layer is suitable for transmitting data to the wireless section. For this, the RLC also performs a function of splitting and connecting the data received from the upper layer.

The PDCP layer is located at the top of the RLC layer and enables data to be transmitted using IP packets such as IPv4 or IPv6 to be efficiently transmitted in a wireless section having a relatively small bandwidth. To this end, the PDCP layer performs a header compression function, which transmits only necessary information in the header portion of the data, thereby increasing the transmission efficiency of the radio section. The PDCP layer exists mainly in the PS domain because header compression is a basic function, and there is one PDCP entity per RB in order to provide an effective header compression function for each PS service. Also, if the PDCP layer exists in the CS domain, the header compression function is not provided.

In addition, a BMC (Broadcast / Multicast Control) layer exists in the upper layer of the RLC layer in the second layer, and performs a function of scheduling a cell broadcast message and broadcasting it to terminals located in a specific cell.

An RRC (Radio Resource Control) layer located at the bottom of the third layer is defined only in the control plane, and controls parameters of the first and second layers in association with the setting, resetting, and releasing of RBs, Channels, transmission channels, and physical channels. In this case, the RB means a logical path provided by the first and second layers of the wireless protocol for data transmission between the terminal and the UTRAN. Generally, the RB is set to a wireless protocol necessary for providing a specific service Layer, and channel, and setting specific parameters and operating methods for each layer.

The Non-Access Stratum (NAS) layer located at the top of the third layer is largely divided into an MM (Mobility Management) entity and a CM (Connection Management) entity. The MM entity distinguishes each terminal and manages a plurality of terminals by a TMSI (Temporary Mobile Subscriber Identity) reassignment process, an authentication process, a terminal identification process, and an IMSI (International Mobile Subscriber Identity) attaching process. Also, the MM entity manages the location information of the current terminal through the update of the location information. The CM entities provide and control the services provided by the network. Accordingly, the corresponding CM entities can establish, manage, and terminate a voice call, provide a session connection setup, management, termination, and SMS (Short Message Serving) corresponding to data communication, .

Both RRC and NAS messages are transmitted through a logical path called SRB (Signaling Radio Bearer). SRB # 0 is used to transmit all RRC messages transmitted over the CCCH logical channel. SRB # 1, # 2, # 3, and # 4 are all used to transmit all RRC or NAS messages transmitted over the DCCH logical channel. SRBs # 1 and # 2 transmit an RRC message, and SRBs # 3 and # 4 transmit a NAS message.

3 is a diagram illustrating an example of a physical channel structure used in a UMTS system.

The physical channel is composed of several subframes on the time axis and several subcarriers on the frequency axis. Here, one subframe consists of a plurality of symbols on the time axis. One subframe is composed of a plurality of resource blocks, and one resource block is composed of a plurality of symbols and a plurality of subcarriers. The BS and the MS generally transmit and receive data through the PDSCH, which is a physical channel, by using the DL-SCH, which is a transmission channel, except for a specific control signal or specific service data. PDSCH data is transmitted to a terminal (one or a plurality of terminals), and information on how the terminals receive and decode PDSCH data is included in the PDCCH and transmitted.

For example, if a particular PDCCH is CRC masked with an RNTI (Radio Network Temporary Identity) A and has a radio resource (e.g., frequency location) B and transmission format information C (e.g., Size, modulation, coding information, etc.) is transmitted through a specific subframe. In this case, one or more UEs in the corresponding cell monitor the PDCCH using the RNTI information it has, and if there is more than one UE having an A RNTI, the UEs receive the PDCCH, And receives the PDSCH indicated by B and C.

FIG. 4 is a diagram illustrating a structure of a NAS (Non Access Stratum) layer according to an embodiment of the present invention. The UMTS network can be classified into two types: an Access Stratum (AS) and a Non-Access Stratum (NAS). At this time, the AS may include protocols related to control signals between the UE and the RNC. Also, the NAS may include protocols related to control signals between the terminal and the core network.

At this time, if there is a signaling connection between the terminal and the core network, the terminal can be set to the connected mode. In addition, if there is no signaling connection between the terminal and the core network, the terminal can be set to the idle mode. For example, when a PS (Packet Switched) signaling connection is established between the UE and the core network, the UE can be set to the PMM connected mode. In addition, when the PS signaling connection is released from the terminal to the core network, the terminal can be set to the PMM idle mode. That is, a connected mode and an idle mode can be set based on whether a signaling connection exists between the terminal and the core network.

In addition, for example, the terminal may perform a service request procedure. In this case, for example, when the terminal is set in the idle mode, the terminal may be switched to the connected mode by performing the service request procedure. That is, the terminal can be switched to the connected mode through the service request procedure.

In addition, for example, if there is data to be transmitted by the mobile station and a radio access bearer is not set, the mobile station can perform the service request procedure. In this case, for example, both the idle mode and the connected mode can perform the service request procedure. If the terminal performs a service request procedure, a radio access bearer may be established and radio resources may be allocated. The terminal can transmit data using the allocated radio resource.

In another example, the terminal may perform a service request procedure for a paging request in idle mode.

Hereinafter, a method for performing a service request procedure when data to be transmitted exists is described.

If there is data to be transmitted while the UE is set to the connected mode, the UE can perform a service request procedure for a radio resource request for an active PDP context. In this case, for example, referring to FIG. 4, each configuration of the terminal may be responsible for each function.

More specifically, the Session Manager (SM) can be defined in the packet switching domain and can be responsible for session connection for transmitting packet data and activation, deactivation and modification of the PDP context. have. That is, the SM can set, release, and change the PDP context based on the presence or absence of data to be transmitted based on the packet exchange.

Also, the Radio Access Bearer Manager (RABM) can receive the PDP context state and radio resource allocation information from the SM and RRC (Radio Resource Control). In this case, for example, the RABM may request the service request procedure to the GPRS Mobility Manager (GMM), if necessary, as will be described later.

In addition, the GMM can perform the service request procedure at the request of the RABM or an upper layer, which will be described later. In addition, the RRC can perform radio resource allocation related functions.

5 is a diagram illustrating a method for performing a service request procedure according to an embodiment of the present invention. The UE can operate in a connected mode in which a core network and a signaling connection exist. Also, the terminal may have a PDP context set. At this time, the PDP serves to provide connection between the terminal and the network so that packet data can be exchanged between the terminal and the network, and information used for connection may be a PDP context. That is, the UE and the core network may be connected to each other for data transmission / reception. In this case, for example, a radio resource for the PDP context may not be allocated. At this time, if there is data to be transmitted through the PDP context, the RABM of the UE may request the GMM to perform the service request procedure. At this time, the GMM can transmit a service request request message to the core network. At this time, for example, the service request request message field may be configured with a service type, a PDP context status, and an uplink data status. In this case, for example, if there is data to be transmitted, the Service Type field may be set to " data " to indicate that there is data to be transmitted. Also, the PDP context status field may indicate the current PDP context status. When the PDP context is set, the PDP context status field may be set to " current active PDP context " to indicate that the PDP context is set. Also, the Uplink data status field may indicate a PDP context in which data pending is present. That is, it can indicate a PDP context requiring radio resource allocation. The GMM may send a request message including the above-described information to the core network. The GMM can then receive a service request response message from the core network. In this case, for example, a Serving GPRS Support Node (SGSN) of the core network may transmit a service request response message. Thereafter, when the GMM receives the service request response message, the GMM regards the service request procedure as terminated and can forward the information to the RABM. Thereafter, the core network can perform a procedure for radio resource allocation. In this case, for example, when the radio resource allocation procedure is performed, the RRC of the UE may transmit the radio resource information allocated to the RABM. At this time, the RABM can perform data transmission using the allocated radio resource information.

6 and 7 are diagrams illustrating a method for allocating radio resources in case of a conflict between a service request procedure and a location registration procedure according to an embodiment of the present invention.

The UE can operate in a connected mode in which a core network and a signaling connection exist. Also, the terminal may have a PDP context set. For example, the radio resource for the PDP context may not be allocated. At this time, if there is data to be transmitted through the PDP context, the RABM of the UE may request the GMM to perform the service request procedure. In this case, for example, after the RABM requests the GMM to perform the service request procedure, the location registration procedure may be performed. As an example, the location registration procedure may be performed when the wireless communication system is changed. The location registration procedure can be performed when there is a need to register a new location, and is not limited to the above embodiment. At this time, the location registration procedure and the service request procedure may conflict. That is, if the service request procedure is performed and the RABM requests the service request procedure to be performed by the GMM, but the location registration procedure needs to be performed, mutual procedures may conflict. At this time, as an example, the GMM may postpone the service request procedure to perform the location registration procedure. That is, the GMM can prioritize the location registration procedure and postpone the service request procedure. In this case, for example, when the GMM performs the location registration procedure, the GMM may transmit a Routing Area Update (RAU) request message to the core network. In this case, for example, the RAU request message may include a follow-on request field and a PDP context status field. That is, the RAU request message includes information indicating whether follow-on request information and PDP context are set as information on a situation of performing a service request after the UE performs the location registration procedure by the GMM, As shown in FIG. At this time, if the PDP context is set, the core network can allocate radio resources for the PDP context upon receiving the RAU request message. That is, the core network can know the status of the PDP context through the RAU request message, and can allocate radio resources. Thereafter, when the GMM receives the RAU response message, the location registration procedure may be terminated. At this time, even if the location registration procedure is completed, the GMM can not know whether the radio resource is allocated for the PDP context. That is, the RAU response message includes only the information for proceeding with the service request, but may not include information about whether or not the radio resource is allocated for the PDP context. At this time, the GMM can perform the service request procedure and receive the radio resource allocation information for the PDP context through the request and response message for the service request. Thereafter, as described above, the terminal can transmit data based on the radio resource information. However, since the radio resources for the PDP context have already been allocated in the location registration procedure, the procedure for allocating the radio resources by the service request may be redundant and unnecessary, and radio resources may be wasted.

In this case, for example, referring to FIG. 7, the MS may not perform the service request procedure when the location registration procedure is performed. That is, since the radio resource for the PDP context has already been set, data can be transmitted based on the radio resource, and the service request procedure can be omitted.

8 and 9 are diagrams illustrating a method of allocating radio resources in case of a conflict between a service request procedure and a PDP context activation procedure according to an embodiment of the present invention.

When the terminal is set to the connected mode, the terminal can perform the PDP context activation procedure. In this case, for example, PDP context activation may be performed through the SM of the terminal. That is, the SM can perform the PDP context activation procedure to change the PDP context to the set state when the PDP context is released. In this case, for example, the SM may transmit PDP context information (active PDP context) set to the RABM after completing the PDP context activation procedure.

In addition, for example, the core network can allocate radio resources for a PDP context set when performing a PDP context activation procedure. In this case, for example, data to be transmitted may be generated before radio resources are allocated. At this time, the RABM may request the service request procedure to the GMM. That is, the PDP context activation procedure and the service request procedure may conflict. At this time, the GMM may not know that the radio resource allocation is in progress, and may start the service request procedure for radio resource allocation for the PDP context. At this time, although the radio resource allocation is completed by the PDP context activation procedure, the core network can transmit the service request response message upon receipt of the service request request message by the service request procedure. At this time, the procedure of assigning the radio resources by the service request may be redundant and unnecessary, and the radio resources may be wasted.

In this case, for example, referring to FIG. 9, the MS may not perform the service request procedure when the PDP context activation procedure is performed. That is, since the radio resource for the PDP context has already been set, data can be transmitted based on the radio resource, and the service request procedure can be omitted.

10 is a diagram illustrating a method of allocating radio resources based on a service request procedure according to an embodiment of the present invention. As described above with reference to FIG. 6 and FIG. 7, there is data to be transmitted in a connected mode in which the UE is connected to the core network (or network), and radio resources may not be allocated. That is, radio resources for the PDP context may not be allocated as data to be transmitted. At this time, the terminal may start a service request procedure by transmitting a service request request message for radio resource allocation. At this time, the service request procedure may be terminated upon receiving the service request response message from the core network (or network) based on the service request request message and completing the resource allocation. In addition, for example, if the service request procedure conflicts with the location registration procedure and the radio resource is allocated by the location registration procedure, the service request procedure may be terminated before receiving the service request response message. In this case, for example, if the radio resource is allocated based on the location registration procedure, the terminal may determine whether to continue performing the service request procedure. At this time, if the radio resource allocation is completed based on the location registration procedure and additional resource allocation is not required, the service request procedure can be terminated. That is, since the radio resource allocation is no longer required, the service request procedure can be terminated. On the other hand, if radio resource allocation is not completed based on the location registration procedure and additional resource allocation is required, the service request procedure can be maintained. That is, the UE can receive the service request response message and perform additional radio resource allocation. That is, the service request procedure may be maintained or terminated depending on whether allocation to the radio resource is required.

11 is a diagram illustrating a method for allocating radio resources based on a service request procedure according to an embodiment of the present invention. As described above with reference to FIG. 8 and FIG. 9, there is data to be transmitted in a connected mode in which the UE is connected to the core network (or network), and radio resources may not be allocated. That is, radio resources for the PDP context may not be allocated as data to be transmitted. At this time, the terminal may start a service request procedure by transmitting a service request request message for radio resource allocation. At this time, the service request procedure may be terminated upon receiving the service request response message from the core network (or network) based on the service request request message and completing the resource allocation. In addition, for example, if the service request procedure conflicts with the PDP context activation procedure and the radio resource is allocated by the PDP context activation procedure, the service request procedure may be terminated before receiving the service request response message. In this case, for example, if the radio resource is allocated based on the PDP context activation procedure, the UE can determine whether to continue performing the service request procedure. At this time, if the radio resource allocation is completed based on the PDP context activation procedure and additional resource allocation is not required, the service request procedure can be terminated. That is, since the radio resource allocation is no longer required, the service request procedure can be terminated. On the other hand, if the radio resource allocation is not completed based on the PDP context activation procedure and additional resource allocation is required, the service request procedure can be maintained. That is, the UE can receive the service request response message and perform additional radio resource allocation. That is, the service request procedure may be maintained or terminated depending on whether allocation to the radio resource is required.

As another example, the UE can maintain the service request procedure in the case of the purpose of PDP context status synchronization even if radio resource allocation is completed. That is, the terminal can receive the service request response message. At this time, the UE can perform synchronization using the service request response message. That is, the UE can receive the service request response message by maintaining the service request procedure if the UE has another purpose such as synchronization even if the assignment to the radio resource is completed.

12 is a flowchart illustrating a method of performing a service request procedure according to an embodiment of the present invention.

The terminal can establish a connected mode connected to the network (S1210). As described above with reference to FIG. 4, the terminal can operate in a connected mode when there is a signaling connection with the core network. Also, the UE can operate in the idle mode if there is no signaling connection with the core network, as described above.

Next, the UE can determine whether there is data to be transmitted to the network (S1220). At this time, the UE can transmit data to be transmitted to the core network with the PDP context set.

Next, the UE can determine whether or not there is an allocated radio resource. At this time, the radio resource may be a radio resource for the PDP context. That is, when there is data to be transmitted, the terminal allocates resources to the PDP context, and data can be transmitted based on the allocated resources (S 1270).

Next, if there is no allocated resource, the terminal can start a service request procedure by transmitting a service request request message (S1240). At this time, as described above with reference to FIGS. 5 to 9, A radio resource can be allocated using a response message transmitted and transmitted to the network. At this time, if the resource is allocated, the terminal can transmit data based on the allocated resource. Next, the UE can determine whether radio resources are allocated based on the first procedure (S1250). As described above with reference to FIGS. 5 to 9, the first procedure may be a location registration procedure or a PDP context activation procedure . In this case, for example, the terminal can be allocated resources for the PDP context in the location registration procedure. In addition, for example, the UE may be allocated radio resources in a PDP context activation procedure. At this time, as described above with reference to FIG. 10, if the terminal completes the allocation for the radio resource and no more radio resource request is required, the terminal can terminate the service request procedure. At this time, the terminal can transmit data using the radio resource.

On the other hand, if the terminal does not complete the radio resource allocation based on the first procedure and further radio resource allocation is required, the terminal can receive the service request response message. That is, the UE can perform the radio resource allocation by maintaining the service request procedure (S1270)

13 is a block diagram of a terminal device according to an embodiment of the present invention.

The terminal device can transmit data. The terminal device 100 includes a transmission module 110 for transmitting a radio signal, a reception module 130 for receiving a radio signal, and a processor 120 for controlling the transmission module 110 and the reception module 130 can do. At this time, the terminal 100 can perform communication with an external device using the transmission module 110 and the reception module 130. [ At this time, the external device may be another terminal device. The external device may be a base station or a core network. That is, the external device may be a device that communicates with the terminal device 100 to exchange data, messages, etc., and is not limited to the above-described embodiment. The terminal device 100 can transmit and receive data and / or information using the transmission module 110 and the reception module 130. [ That is, the terminal device 100 can exchange information with an external device by performing communication using the transmission module 110 and the reception module 130. [

In this case, for example, the processor 120 may set a connected mode connected to the network. In addition, if there is data to be transmitted to the network and the radio resource is not allocated, the processor 120 may start a service request procedure by transmitting a service request request message through the transmission module. At this time, the service request procedure may be terminated based on either a case where the service request response message is received, a radio resource is allocated, and a case where radio resources are allocated based on the first procedure. In this case, for example, the first procedure may be any one of a location registration procedure and a PDP context activation procedure. Further, in one example, the processor 120 may perform the first procedure and determine whether to perform the service request procedure based on the first procedure performed. In this case, for example, if the radio resource allocation is completed based on the first procedure and further radio resource allocation is not required, the service request procedure may be terminated. Further, for example, if the radio resource allocation is not completed based on the first procedure and further radio resource allocation is required, the service request procedure can be maintained. At this time, the terminal may receive the service request response message and allocate additional radio resources. In addition, for example, when the first procedure is the PDP context activation procedure, a service request response message can be transmitted if PDP context status synchronization is required even if radio resource allocation is completed and further radio lease allocation is not required. That is, the terminal can maintain the service request procedure for purposes other than the radio resource purpose, as described above.

The above-described embodiments of the present invention can be implemented by various means. For example, embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.

In the case of hardware implementation, the method according to embodiments of the present invention may be implemented in 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 an implementation by firmware or software, the method according to embodiments of the present invention may be implemented in the form of a module, a procedure or a function for performing the functions or operations described above. The software code can be stored in a memory unit and driven by the processor. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various well-known means.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The foregoing description of the preferred embodiments of the present invention has been presented for those skilled in the art to make and use the invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. 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, but, on the contrary, It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention.

In this specification, both the invention and the method invention are explained, and the description of both inventions can be supplemented as necessary.

100: terminal device
110: Transmission module
120: Processor
130: Receiving module

Claims (10)

A method for a terminal to perform a service request procedure in a wireless communication system,
Establishing a connected mode in which the terminal is connected to a network;
When the UE has data to be transmitted to the network and a radio resource is not allocated, transmitting a service request request message to start the service request procedure; And
And terminating the service request procedure,
Wherein the service request procedure is terminated based on either receiving a service request response message and when the radio resource is allocated and the radio resource is allocated based on a first procedure. The method according to claim 1,
Wherein the first procedure is any one of a location registration procedure and a PDP context activation procedure. 3. The method of claim 2,
Performing the first procedure; And
Further comprising: determining whether to continue performing the service request procedure based on the first procedure performed,
And if the radio resource allocation is completed based on the first procedure, the service request procedure is terminated. The method of claim 3,
Wherein if the radio resource allocation is not completed based on the first procedure and the radio resource allocation is further required, the service request procedure is maintained. The method of claim 3,
And if the radio resource allocation is completed based on the first procedure, the network does not transmit the service request response message. 6. The method of claim 5,
If the first procedure is the PDP context activation procedure, the network determines whether PDP context status synchronization is required even if the radio resource assignment is completed based on the first procedure. And transmitting a service request response message. A terminal apparatus for performing a service request procedure in a wireless communication system,
A receiving module for receiving a message from an external device;
A transmission module for transmitting a message to an external device; And
A processor for controlling the receiving module and the transmitting module,
The processor comprising:
Set the Connected Mode that is connected to the network,
When there is data to be transmitted to the network and a radio resource is not allocated, a service request request message is transmitted through the transmission module to start the service request procedure,
And terminating the service request procedure, wherein the service request procedure is terminated based on any one of a case where the radio resource is allocated and a case where the radio resource is allocated based on a first procedure, A terminal device performing a service request procedure. 8. The method of claim 7,
Wherein the first procedure is one of a location registration procedure and a PDP context activation procedure. 9. The method of claim 8,
The processor comprising:
Performing the first procedure and determining whether to continue performing the service request procedure based on the first procedure performed,
And terminating the service request procedure when the radio resource allocation is completed based on the first procedure. 10. The method of claim 9,
The processor comprising:
And if the radio resource allocation is not completed based on the first procedure and the radio resource allocation is further required, the service request procedure is maintained.

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