KR20070068818A - Apparatus and method for transmitting signaling message in a wireless communication system - Google Patents

Abstract

A signaling message transceiving device in a wireless communication system and a method therefor are provided to prevent time delay from occurring due to message transmission by sending messages through bandwidth allocation at certain intervals from an RAS(Radio Access Station) through UGS(Unsolicited Granted Service) connection setup. When a signaling message is transmitted, the first terminal performs UGS connection setup with an RAS of the first PSS(Portable Subscriber Station) to transmit the signaling message(701-709). The PSS is allocated with bandwidths at certain intervals from the RAS through the UGS connection setup, and sends the signaling message through the bandwidths. The second PSS receiving the signaling message of the first PSS conducts UGS connection setup with the RAS to send the signaling message, and the signaling message is transceived between the first and second PSSs(711).

Description

Apparatus and method for transmitting and receiving signaling messages in a wireless communication system {APPARATUS AND METHOD FOR TRANSMITTING SIGNALING MESSAGE IN A WIRELESS COMMUNICATION SYSTEM}

1 schematically illustrates a configuration of a general wireless access communication system

2 is a signal flowchart schematically illustrating an operation of establishing a call between terminals in a general wireless communication system.

3 is a signal flowchart schematically illustrating a process of band allocation in a general wireless access communication system.

4 is a diagram schematically illustrating a hierarchical structure to which a structure of a terminal of a wireless communication system according to an embodiment of the present invention is applied;

5 is a diagram schematically illustrating SIP message processing according to an embodiment of the present invention.

6 is a signal flow diagram schematically illustrating an operation of establishing a call between terminals in a wireless communication system according to an embodiment of the present invention.

7 is a flowchart schematically illustrating an operation of a terminal for transmitting a SIP message according to an embodiment of the present invention.

The present invention relates to a wireless communication system, and more particularly, to an apparatus and method for transmitting and receiving signaling messages in which time delay does not occur due to call establishment in a broadband wireless access communication system.

Digital cellular wireless communication system, which improves the channel capacity and voice quality of analog cellular wireless communication, provides voice and low-speed data services. Therefore, there are limitations in providing various multimedia services. However, according to the development of communication technology, a wireless communication system, that is, an international mobile telecommunication (IMT)-that allows access to a fixed network service such as an existing telephone or an integrated service digital network (ISDN) using one or more wireless links. 2000 A communication system has emerged. The IMT-2000 communication system is a communication system that can transmit and receive various information at high speed anywhere in the world by overcoming the limitations of the mobility of the terminal and the limitation of the transmission speed. Accordingly, the IMT-2000 communication system has been developed to provide a multimedia service such as a high speed data service and a video service including the Internet as well as a voice service.

However, with the recent increase in various multimedia services using the Internet, attempts to interwork multimedia services provided by the wired Internet have been increasing in the wireless communication system. In addition, researches are being actively conducted on broadband wireless communication systems that can provide high-speed, high-quality multimedia services not provided by conventional narrowband wireless communication systems.

In such a broadband wireless communication system, it is contemplated to provide data services based on Internet Protocol (hereinafter referred to as 'IP') and services such as Voice over Internet Protocol (VoIP).

In order to provide the VoIP service and the like, a service is provided through an IP based network, and the IP network is referred to as an Internet Multimedia Subsystem (IMS), for example. Network. Thus, a wireless communication system for providing the IP-based data service, that is, VoIP service, for example, will be described.

1 is a diagram schematically illustrating a configuration of a general wireless access communication system.

Referring to FIG. 1, the broadband wireless access communication system includes a mobile subscriber station (PSS) 1 (120) and a base station (RAS) that provides a service to a plurality of terminals including the terminal 1 (120). Station 1 (110) and an Access Control Router (ACR) 1 (100) for controlling a plurality of base stations, including base station 1 (110). The base station controller 1 110 is connected to the IMS network. The wireless access communication system also includes a base station controller 2 (150) and a base station 2 (160) which perform functions similar to the base station controller 1 (100), base station 1 (110), and terminal 1 (120) connected through the IMS network. And terminal 2 170.

In this case, the IMS network provides an IP-based multimedia (IM) service, and the IM service is a service capable of simultaneously providing various types of packet-based services based on an IP transport protocol under a terminal. . The IM service enables a terminal to simultaneously use existing real-time services such as voice and video as well as non real-time services such as file transfer and e-mail short message. New services using the above services are available, such as video phones, instant messaging, emergency calls, local services, presence services, and the like. Thus, the IP multimedia service domain is a call session control function (Call Session Control Function) responsible for the registration and multimedia call processing function using the Session Initiation Protocol (SIP). CSCF ') is used to perform a function such as establishing or releasing a session. Thus, in the broadband wireless access communication system employing the IMS, a call must be established between terminals for the VoIP service.

The basic function of the Session Initiation Protocol (SIP) is called as 'SIP' and is used between all terminals capable of voice communication, including computers, Internet phones, personal digital assistants (PDAs) and mobile phones. It is possible to perform functions such as call setup, call management, and application service requests. In particular, when applied to a wireless communication system, it provides a function to set up and maintain a call when roaming as well as general call setup. Thus, call setup is performed based on SIP in a wireless communication network. At this time, a call setup process based on the SIP will be described.

2 is a signal flowchart schematically illustrating an operation of establishing a call between terminals in a general wireless communication system.

Referring to FIG. 2, the terminal 1 120 performs a quick connection setup (hereinafter referred to as 'QCS') in the idle mode. Step 201). At this time, the terminal 1 120 and the base station 1 110 establish a session initiation protocol (SIP) of the terminal when the best effort (BE: Best Effort, hereinafter referred to as 'BE') connection is ready. Bandwidth Allocation is performed for message transmission. The process of performing the band allocation will be described in detail below, and the detailed description thereof will be omitted.

When the terminal 1 120 is allocated an uplink band for transmitting the SIP message, the terminal 1 120 transmits a SIP INVITE message for establishing a session (step 203). The SIP INVITE message is connected to the IMS network through ACR 1 (not shown), and the terminal receives the SIP INVITE message transmitted by the terminal 1 120 through Call State Control Functions (CSCFs) 200 of the IMS network. 2 170 will receive. The SIP INVITE message is a message for requesting to start a session and includes an IP address of a transmitter, namely, terminal 1 (120), Session Description Protocol (SDP) information describing a media type, and the like. In this case, each of the base station controller 1 and the base station controller 2 connecting the IMS network, the base station 1 110, and the base station 2 160 will not be shown for convenience of description.

The base station 2 160, which has received the SIP INVITE message through the CSCFs 200 of the IMS network, performs paging and QCS with the terminal 2 170. Thus, the base station 2 160 and the terminal 2 170 transmits the SIP INVITE message to the terminal when the BE connection is ready (step 206). Accordingly, the terminal 2 170 and the base station 2 160 perform a dynamic service addition (DSA) procedure for transmitting VoIP traffic (step 207).

Thereafter, the terminal 2 170 and the base station 2 160 perform band allocation for uplink band allocation for transmitting the SIP message of the terminal 2 170. Accordingly, the terminal 2 170 allocated to the uplink band transmits a SIP 183 Session Progress message to inform the terminal 1 120 that the session is in progress (step 209). In this case, when the SIP 183 Session Progress message takes a certain time to process the message in the receiver, that is, the terminal 2 (170), the terminal 1 (120) recognizes that the message has not been received normally and transmits to prevent retransmission. Message. Thus, the terminal 1 120 receiving the SIP 183 Session Progress message recognizes that the terminal 2 170 is processing the SIP message.

In response to the SIP 183 Session Progress message, the base station 1 110 and the terminal 1 120 perform a DSA procedure for transmitting VoIP traffic (step 211). In addition, the terminal 1 120 and the base station 1 110 perform band allocation for transmitting the SIP message of the terminal 1 120. Unlike the general call setup, SIP-based call setup in the wireless communication system performs a process of securing resources required for call setup first, and in particular, checks whether messages in the call setup process are correctly performed before performing a resource acquisition process. do. At this time, since it is not possible to know whether the SIP INVITE message is correctly received by the terminal 2 (170), for this purpose, the SIP 183 Session Progress message is transmitted to the terminal 1 (120), and the terminal 1 (120) is a SIP Provisional Response ACK (PRACK). The message is transmitted to the terminal 2 170, and the terminal 2 170 confirms that the call setup process is normally performed. In this case, the SIP PRACK message is a response message to the messages of the SIP 18x series.

In response, the terminal 1 120 transmits a SIP PRACK message to the terminal 2 170 (step 213). Thus, the terminal 2 170 receiving the SIP PRACK message performs band allocation with the base station 2 160. The terminal 2 170 transmits a SIP 200 OK message to the terminal 1 120 (step 215). The SIP 200 OK message is a response message indicating that the transmission of each SIP message is successful.

In response to the SIP 200 OK message, the terminal 1 120 performs band allocation with the base station 1 110 and transmits a SIP UPDATE message to the terminal 2 170 (step 217). In this case, the SIP UPDATE message enables two-way data transmission and reception by changing an attribute item representing a media, that is, a direction indicating the flow of data, to 'sendrecv' in SDP information. However, in the case of the SIP INVITE message, the flow of the data is blocked by transmitting the attribute item in the SDP information by setting 'None'.

Upon receiving the SIP UPDATE message, the terminal 2 170 performs band allocation with the base station 2 160 and transmits a SIP 200 OK message to the terminal 1 120 (step 219). In addition, the terminal 2 170 performs band allocation with the base station 2 160 again and transmits a SIP 180 ringing message according to the band allocation to the terminal 1 120 to generate a telephone ring tone at the terminal 1 120 ( Step 221).

The terminal 1 120 transmits the SIP PRACK message to the terminal 2 170, and the terminal 2 170 confirms that the call setup process is normally performed (step 223). Terminal 2 170 performs band allocation with base station 2 160 and transmits a SIP 200 OK message to terminal 1 120 (step 225). After transmitting the SIP 200 OK message, the terminal 2 170 performs band allocation with the base station 2 160 and transmits the SIP 200 OK message to the terminal 1 120 (step 227).

Thus, the terminal 1 120 receiving the SIP 200 OK message performs band allocation with the base station 1 110 and transmits a SIP ACK message to the terminal 2 170 (step 229). Thus, when the transmitter, that is, the terminal 1 120 receives a successful SIP 200 OK message for the SIP INVITE message, sends a SIP ACK message to confirm that the SIP signaling is completed through a 3-way handshake process. do.

In FIG. 2, a call setup process through SIP is described, and the band allocation process will be described below.

3 is a signal flowchart schematically illustrating a process of band allocation in a general wireless access communication system.

Referring to FIG. 3, uplink (UL) band allocation is performed between the terminal and the base station illustrated in FIG. 2. In this case, the band allocation between the terminal 300 and the base station 350 will be described. . In this case, the terminal 300 transmits a bandwidth request ranging code to the base station (step 301). In this case, the bandwidth request ranging code is a message for requesting band allocation in order to communicate with the base station 350. At this time, if the bandwidth allocation request using the bandwidth request ranging code is performed in a competitive manner. Thus, the base station 350 which has successfully received the bandwidth request ranging code is assigned to the terminal 300 by code division multiple access (CDMA: Cdoe Division Multiple Access (CDMA)) allocation information element (CMDA_Allocation_IE). In step 303, an uplink-map (UL-MAP) message including an (Information Element) is transmitted.

The terminal 300 detects a CDMA allocation information element included in the UL-MAP message, and uses a band request protocol data unit (PDU) using an uplink resource included in the CDMA allocation information element, that is, an uplink band. Protocol Data Unit) message is transmitted to the base station 350 (step 305). The base station 350 receiving the bandwidth request protocol data unit message from the terminal 300 allocates an uplink band for data transmission of the terminal 300. The base station 350 allocates an uplink band allocated for data transmission of the terminal 300. The base station 350 transmits a UL-MAP message including uplink band (uplink burst) information allocated for data transmission of the terminal to the terminal (step 307).

Upon receiving the UL-MAP message from the base station 350, the terminal 300 communicates with the base station 350 through the uplink band allocated for the data transmission (step 309).

In the radio section of the wireless communication system, all signaling messages of the IP layer and its upper layer are generally regarded as the same as general data and processed. Accordingly, the signaling message, for example, the SIP message, etc. are all considered to be the same as general data, and an uplink band is allocated through a band allocation process for transmitting the SIP message, and the SIP message is transmitted.

Accordingly, a plurality of band allocation processes have to be performed for signaling message transmission according to the call setup illustrated in FIG. 2. In addition, a three-way handshake process, which is a procedure for establishing a call between a base station and a terminal, shows that multiple band allocations are performed. As a result, there is a problem that the terminal needs to request a required band and perform a band allocation process every time a signaling message, that is, a SIP message is transmitted from the base station.

Moreover, as this band allocation process is performed in a contention-based manner each time, it takes a lot of time for actual band allocation, and as the number of band allocations increases, these time delays accumulate, causing a large time delay in call setup. There was a problem. In addition, in the case of providing a service that is sensitive to time delay such as VoIP, there is a problem that normal service cannot be provided because the minimum performance requirement of the service is not satisfied.

Accordingly, an object of the present invention is to propose an apparatus and method for transmitting and receiving signaling messages in which no time delay occurs due to message transmission in a wireless communication system.

Another object of the present invention is to propose an apparatus and method for transmitting a signaling message that satisfies a minimum performance requirement of a corresponding service in a time delay sensitive service in a wireless communication system.

The method of the present invention for achieving the above objects; In the method for transmitting and receiving a signaling message in a wireless communication system, when the first terminal transmits a signaling message, the first terminal performs a non-required guaranteed service connection establishment with the base station of the first terminal to transmit the signaling message, and the non-required request. A process of allocating a band from a base station at regular intervals through a guaranteed service connection setting, transmitting the signaling message through the band, and a second terminal receiving the signaling message of the first terminal may be connected with the first terminal. And performing an unsolicited guaranteed service connection establishment with the corresponding base station for transmitting the signaling message, and transmitting and receiving a signaling message between the first terminal and the second terminal.

Another method of the present invention for achieving the above objects is; A method for transmitting a signaling message of a terminal in a wireless communication system, the method comprising: checking whether a message to be transmitted is a signaling message, and if the message to be transmitted is a signaling message, establishing a UGS connection with a corresponding base station; And receiving a band from the base station at regular intervals through the connection establishment, and transmitting the signaling message through the allocated band.

Another method of the present invention for achieving the above objects is; A method for receiving a signaling message of a terminal in a wireless communication system, the method comprising: establishing an unsolicited guaranteed service connection with a corresponding base station to transmit a signaling message corresponding to the signaling message, and signaling a signal corresponding to the received signaling message. And transmitting through a band allocated at intervals from the base station at intervals.

The apparatus of the present invention for achieving the above objects; In a signaling message transmission / reception apparatus of a terminal in a wireless communication system, when transmitting a signaling message, an unsolicited guaranteed service connection is established with a corresponding first base station for transmitting the signaling message, and a base station is configured through the unsolicited guaranteed service connection. A first terminal for allocating a band at intervals of a predetermined period from the second terminal, transmitting the signaling message through the band, and receiving a signaling message of the first terminal, and corresponding second for transmitting a signaling message with the first terminal. And a second terminal configured to establish an unsolicited guaranteed service connection with the base station and to transmit and receive a signaling message with the first terminal.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

The present invention relates to an apparatus and method for transmitting and receiving a signaling message in a wireless access communication system, and transmits the signaling message, that is, a Session Initiation Protocol (SIP) message. The first terminal checks whether the message received from the upper layer is a SIP message, and if the SIP message is the SIP message, connects to an Unsolicited Granted Service (UGS) for transmitting the message. Set with the base station. The first terminal transmits a SIP message to the corresponding second terminal through the UGS connection. The second terminal receiving the SIP message of the first terminal also establishes a UGS connection with the base station and transmits the SIP message to the first terminal through the UGS connection. In this case, the UGS connection establishment is performed through a dynamic service addition procedure.

In a wireless access communication system, such as a data service based on an Internet Protocol (IP), for example, an Internet telephone (VoIP: Voice over Internet Protocol, hereinafter referred to as `` VoIP ''). Considering the provision of services. Here, VoIP generally means simply exchanging voice information on the Internet, but actually VoIP means exchanging data such as voice information as well as voice information on the Internet.

In addition, in order to provide the above-described VoIP service in a wireless communication system, a service is provided through an Internet Multimedia Subsystem (IMS) network, which is an IP-based network. The structure of the wireless communication system to which the IMS is applied has been described with reference to FIG. 1, and a session initialization protocol is used to set up, release, etc., a session between each component of the wireless communication system. Therefore, the present invention will be described on the premise that communication is performed through a terminal, a base station, and a base station controller in which the session initialization protocol is implemented.

4 is a diagram schematically illustrating a hierarchical structure to which a structure of a terminal of a wireless communication system according to an embodiment of the present invention is applied.

Referring to FIG. 4, in general, unlike a wired communication system, a wireless communication system does not have a layer subdivided by its function. In the wireless communication system, a layer is largely an application layer 400, a medium access control ( MAC Layer: Medium Access Control, hereinafter referred to as 'MAC') Layer (MAC Layer) 430, Physical (PHY: PHYsical, hereinafter referred to as 'PHY') Layer (PHY Layer) 460 do. In the wireless communication system, one MAC layer is responsible for various functions, and according to the function of the MAC layer, the MAC layer is referred to as a convergence sublayer (CS) (hereinafter, referred to as a 'CS') 440. Sub-layers of a common part sublayer (CPS: 450).

The CS layer 440 includes a classifier 441 and a connection controller 443, and the CPS 450 layer is a MAC protocol data unit (MAC PDU). A MAC PDU Processor 451 and a MAC Scheduler 453 are included.

The application layer 400 transmits, to the MAC layer 430, a service data unit (SDU), which is generated for transmitting a SIP message for call setup with another terminal to communicate with, to the MAC layer 430. do.

The classifier 441 of the MAC layer 430 identifies the IP header of the IP packet in the SDU received from the application layer and classifies the packet by service flow. The classifier 441 is an application of items such as a source IP address, a destination IP address, a source port number, a destination port number, and a protocol. Identifies packets received at the layer. Accordingly, the classifier 441 classifies packets according to service flows using the classified packets.

The connection controller 443 maps connection IDs (CIDs) according to the divided service flows. In this case, the access controller 443 maps one CID having a unique value in each radio period to each service flow. Here, the classifier 441 and the connection controller 443 of the CS layer 440 will be described in detail with reference to the accompanying drawings.

The MAC PDU processor 451 generates a MAC PDU transmitted in a radio section between the terminal and the base station.

The MAC scheduler 453 may be referred to as a service flow, for example, an Unsolicited Granted Service (UGS), or a RealTime Polling Service (rtPS). MAC PDUs are scheduled according to a non-real-time polling service (nrtPS: Non RealTime Polling Service (hereinafter referred to as 'nrtPS')), best effort (hereinafter referred to as BE) service, etc. Determine when to send a message.

Thus, the message generated at the MAC layer 430 is transmitted to the corresponding base station of the terminal through the PHY layer 460. Next, a process of processing a SIP message by the classifier 441 and the access controller 443 of the CS layer 430 will be described with reference to FIG. 5.

5 is a diagram schematically illustrating SIP message processing according to an embodiment of the present invention.

Referring to FIG. 5, a UDP packet 501 including the SIP message is shown, and an IP packet 503 including an IP header and an IP payload including the UDP packet 501 is illustrated.

The classifier 441 receiving the IP packet 503 classifies the packet into a source IP address, a destination IP address, a source port number, a destination port number, and a protocol item. The classifier 441 determines that the packet is a packet for transmitting a SIP message if the destination port number is 5060 (port number of a general SIP protocol). In the case of the SIP message, the protocol is set to UDP.

Thus, the classifier 441 classifies the packet and classifies the packet by service flow according to the packet. According to the present invention, the signaling message, that is, the SIP message, is classified as UGS according to the service flow.

The access control unit 443 allocates the classified SIP message to each CID for each service flow. As such, the CID is allocated according to the service flow, the CID 1 is allocated when the service flow is UGS, the CID 2 is allocated when the BE is BE, and the CID n is allocated when the rtPS is used. In addition, the access controller 443 performs a DSA procedure with a corresponding base station to establish a UGS connection for SIP signaling.

Next, an operation flowchart between terminals transmitting a signaling message by applying the terminal will be described with reference to FIG. 6 below.

6 is a signal flowchart schematically illustrating an operation of establishing a call between terminals in a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 6, in the idle mode of the terminal 1 600, the terminal 1 600 and the base station 1 630 are referred to as a Quick Connection Setup (QCS). (Step 601). At this time, the terminal 1 600 and the base station 1 630 transmit the SIP messages of the terminal to the base station when the BE connection is ready.

Thus, in the present invention, the terminal 1 600 confirms that the destination port number of the IP packet header received by the MAC layer is, for example, '5060', a SIP message. Accordingly, the terminal 1 600 performs a dynamic service addition (DSA) procedure with the base station 1 630 to connect the SIP message (step 603). In this case, the DSA procedure is for establishing a UGS connection for transmitting a SIP message.

Therefore, the packet generation period and the bandwidth allocation period are matched by the UGS connection between the transmitting and receiving terminals. Therefore, each base station allocates a band for transmitting a packet at intervals of 20 ms, for example, in the case of VoIP, without performing the band allocation process. Accordingly, the terminal can transmit a SIP message without performing the existing band allocation process.

Next, when the terminal 1 600 performs a DSA procedure for transmitting a SIP message, the terminal 1 600 transmits a SIP INVITE message for establishing a session (step 605). The SIP INVITE message is connected to an IMS network through ACR 1 (not shown), and the terminal 2 690 receives a SIP INVITE message transmitted by the terminal 1 600 through CSCFs 650 of the IMS network. Done.

Here, the SIP INVITE message is a message for requesting to start a session and includes an IP address of a transmitter, that is, a terminal 1 (600), session description protocol (SDP) information describing a media type, and the like. In this case, each of the base station controller 1 and the base station controller 2 connecting the IMS network to the base station 1 630 and the base station 2 670 will not be shown for convenience of description.

The base station 2 670 that receives the SIP INVITE message through the CSCFs 650 of the IMS network performs paging and QCS with the terminal 2 690. Thus, the base station 2 670 and the terminal 2 690 transmits the SIP INVITE message to the terminal when the BE connection is ready (step 609). Accordingly, the terminal 2 690 and the base station 2 670 perform a DSA procedure for transmitting VoIP bearer traffic (step 611).

Thereafter, the terminal 2 690 and the base station 2 670 perform a DSA procedure for transmitting the SIP message of the terminal 2 690 (step 613). Accordingly, the terminal 2 690 transmits a SIP 183 Session Progress message for notifying that the session is in progress to the terminal 1 600 (step 615). In this case, when the SIP 183 Session Progress message takes a certain time to process the message in the receiver, that is, the terminal 2 690, the SIP 183 Session Progress message is recognized as not receiving the message normally in the terminal 1 600 and transmitted to prevent retransmission. Message. Thus, the terminal 1 600 receiving the SIP 183 Session Progress message recognizes that it is processing a SIP message.

In response to the SIP 183 Session Progress message, the base station 1 630 and the terminal 1 600 perform a DSA procedure for transmitting VoIP bearer traffic (step 617). Unlike the general call setup, SIP-based call setup in the wireless communication system performs a process of securing resources required for call setup first, and in particular, checks whether messages in the call setup process are correctly performed before performing a resource acquisition process. do. At this time, since it is not known whether the terminal 2 690 correctly received the SIP INVITE message, for this purpose, the SIP 183 Session Progress message is transmitted to the terminal 1 600, and the terminal 1 600 sends a SIP PRACK (Provisional Response ACK). The message is transmitted to the terminal 2 690, and the terminal 2 690 confirms that the call setup process is normally performed. In this case, the SIP PRACK message is a response message to the messages of the SIP 18x series.

The terminal 1 600 transmits a SIP PRACK message to the terminal 2 690 (step 619). Thus, the terminal 2 690 receiving the SIP PRACK message transmits a SIP 200 OK message to the terminal 1 600 (step 621). The SIP 200 OK message is a response message indicating that the transmission of each SIP message is successful.

In response to the SIP 200 message, the terminal 1 600 transmits a SIP UPDATE message to the terminal 2 690 (step 623). In this case, the SIP UPDATE message enables two-way data transmission and reception by changing an attribute item representing a media, that is, a direction indicating the flow of data, to 'sendrecv' in SDP information. However, in the case of the SIP INVITE message, the flow of the data is blocked by transmitting the attribute item in the SDP information by setting 'None'.

Upon receiving the SIP UPDATE message, the terminal 2 690 transmits a SIP 200 OK message to the terminal 1 600 (step 625). In operation 627, the terminal 2 690 transmits a SIP 180 ringing message to the terminal 1 600 to generate a telephone ring tone at the terminal 1 600.

The terminal 1 600 transmits a SIP PRACK message to the terminal 2 690, and the terminal 2 690 confirms that the call setup process is normally performed (step 629). The terminal 2 690 transmits a SIP 200 OK message to the terminal 1 600 (step 631). After transmitting the SIP 200 OK message, the terminal 2 690 transmits the SIP 200 OK message to the terminal 1 600 (step 633).

Thus, the terminal 1 600 receiving the SIP 200 OK message transmits a SIP ACK message to the terminal 2 690 (step 635). Therefore, when the transmitter, that is, the terminal 1 600 receives the successful SIP 200 OK message for the SIP INVITE message, sends a SIP ACK message to confirm that the SIP signaling is completed through the 3-way handshake process. do.

Eventually, the SIP message was transmitted through the UGS connection as described above. Therefore, since the band allocation process is not performed between the terminal and the base station, it is possible to simplify the band allocation process according to call setup. Accordingly, in the call setup process, it is possible to reduce the time delay and send and receive SIP messages.

When the SIP message transmission and reception for the call setup is completed, that is, when the SIP ACK message is received, a dynamic service deletion (DSD) procedure for releasing a corresponding UGS connection is referred to as a 'DSD'. Perform When the terminal 1 600 completes the transmission of the SIP ACK message, the terminal 1 600 performs a DSD procedure with the base station 1 630. In addition, the terminal 2 690, which has received the SIP ACK message, performs a DSD procedure with the base station 2 670. Next, an operation of the terminal for transmitting the signaling message, that is, the SIP message will be described with reference to FIG. 7.

7 is a flowchart schematically illustrating an operation of a terminal for transmitting a SIP message according to an embodiment of the present invention.

Referring to FIG. 7, the terminal checks the destination port number of the IP packet header in step 701 and proceeds to step 703. In this case, when the destination port number is set to '5060' as an example, since the '5060' is a port number in the case of a general SIP message, it is possible to distinguish a SIP message.

In step 703, the terminal checks whether the IP packet to be transmitted through the destination port number includes a signaling message, that is, a SIP message. In this case, if the destination port number is not '5060' which is the port number of the SIP protocol, the flow proceeds to step 705. In step 705, since the terminal is not the SIP message, the terminal performs a procedure corresponding to the message.

However, if the destination port number is set to '5060' which is the SIP protocol number, the terminal confirms that the SIP message and proceeds to step 707.

In step 707, if the message is a SIP message, the terminal performs a DSA procedure for UGS connection for transmitting and receiving a baby SIP message and proceeds to step 709. In step 709, the terminal establishes a UGS connection with the corresponding base station through the DSA procedure.

In step 711, the terminal transmits and receives a SIP message through the UGS connection. Here, the terminal receives a band for transmitting a SIP message from a base station at intervals of a predetermined period, and transmits the SIP message through the terminal.

In step 713, the terminal checks whether the transmission and reception of the message with the corresponding terminal to communicate with is completed. If the transmission and reception of the message is not completed as a result of the confirmation, the flow proceeds to step 711 to perform message transmission and reception. However, if the transmission and reception of the message is completed as a result of the check proceeds to step 715.

In step 715, the terminal performs a DSD procedure for releasing the established UGS connection with the corresponding base station. In step 717, the terminal and the base station release the UGS connection with the base station through the DSD procedure.

7 schematically illustrates an operation of a terminal for transmitting a SIP message according to the present invention. The terminal that transmits and receives a SIP message corresponding to the terminal receives a SIP message, that is, a SIP INVITE message through the UGS connection, and accordingly performs a DSA procedure for VoIP bearer service. The UE performs a DSA procedure for establishing a UGS connection and transmits a SIP message through the established UGS connection. In addition, the terminal also releases the UGS connection through the DSD procedure when the transmission and reception of the SIP message is completed as in the terminal shown in FIG.

In the following description of the present invention, the signaling message is described as an example of a SIP message. However, the signaling message is not limited to the SIP message and can be extended to a signaling message for performing the aforementioned band allocation process. Although the SIP message transmission is limited to call setup, the UGS connection setup as described above is not only performed in a call setup process but also in an operation process between terminals for transmitting the SIP message, for example, call management and application service request. SIP message transmission is possible through this.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention proposes a signaling message transmission and reception in which a time delay due to message transmission does not occur in a wireless communication system. Accordingly, each time a conventional signaling message is transmitted, the message is transmitted through band allocation at regular intervals from the base station through UGS connection setup without performing a band allocation process with the base station. This has the advantage that it is possible to perform signaling message transmission without the existing band allocation process. In particular, in case of a service that is sensitive to time delay, it is possible to transmit a signaling message by satisfying the minimum performance requirement of the service. In addition, when providing a VoIP service through the signaling message transmission procedure proposed in the present invention, it is possible to provide a high quality service by simplifying the signaling message transmission procedure as described above.

Claims (26)

In the method for transmitting and receiving signaling messages in a wireless communication system, When the first terminal transmits a signaling message, performing a non-required guaranteed service connection establishment with the corresponding base station of the first terminal to transmit the signaling message; Receiving a band from the base station at regular intervals through the unsolicited guaranteed service connection setting, and transmitting the signaling message through the band; Upon receiving the signaling message of the first terminal, the second terminal establishes an unsolicited guaranteed service connection with the base station for transmitting the signaling message with the first terminal, and transmits and receives a signaling message between the first terminal and the second terminal. Signaling message transmission and reception method comprising the step of. The method of claim 1, And the signaling message is a session initiation protocol message. The method of claim 1, And transmitting an access identifier by mapping an access identifier to the signaling message. The method of claim 1, The unsolicited guarantee service is a connection message transmission and reception method, characterized in that for establishing the connection by performing a dynamic service addition procedure. The method of claim 1, Determining, by the first terminal, whether transmission and reception of the signaling message is terminated; And removing the unsolicited guaranteed service when transmission and reception of the signaling message are terminated as a result of the determination. The method of claim 1, Determining, by the second terminal, whether transmission and reception of the signaling message has ended; And removing the unsolicited guaranteed service when transmission and reception of the signaling message are terminated as a result of the determination. A method for transmitting a signaling message of a terminal in a wireless communication system, Checking whether a message to be transmitted is a signaling message, Performing the UGS connection establishment with the base station when the message to be transmitted is a signaling message as a result of the checking; And a band is allocated from the base station at regular intervals through the UGS connection establishment, and the signaling message is transmitted through the allocated band. The method of claim 7, wherein And the signaling message is a session initiation protocol message. The method of claim 7, wherein The step of confirming the signaling message is a signaling message transmission method characterized in that it is confirmed that the signaling message through the destination port number of the Internet protocol packet to be transmitted. The method of claim 7, wherein And transmitting a connection identifier by mapping the access identifier to the signaling message. The method of claim 7, wherein The unsolicited guaranteed service is configured to establish a connection by performing a dynamic service addition procedure. The method of claim 7, wherein Determining, by the terminal, whether transmission and reception of the signaling message is terminated; And when the transmission and reception of the signaling message is terminated as a result of the determination, deleting the unsolicited guaranteed service. A method for receiving a signaling message of a terminal in a wireless communication system, Establishing an unsolicited guaranteed service connection establishment with a corresponding base station for transmitting a signaling message corresponding to the signaling message; And transmitting a signaling message corresponding to the received signaling message through a band allocated at intervals of a predetermined period from the base station. The method of claim 13, And the signaling message is a session initiation protocol message. The method of claim 13, The unsolicited guaranteed service is configured to establish a connection by performing a dynamic service addition procedure. The method of claim 13, Determining, by the terminal, whether transmission and reception of the signaling message is terminated; And if the transmission and reception of the signaling message is terminated as a result of the determination, deleting the unsolicited guaranteed service. An apparatus for transmitting and receiving a signaling message of a terminal in a wireless communication system, In case of transmitting a signaling message, a non-required guaranteed service connection is established with a corresponding first base station for transmitting the signaling message, and a band is allocated at regular intervals from the base station through the unrequired guaranteed service connection. A first terminal for transmitting the signaling message through; And a second terminal receiving the signaling message of the first terminal, establishing an unsolicited guaranteed service connection establishment with the corresponding second base station for transmitting a signaling message with the first terminal, and transmitting and receiving a signaling message with the first terminal. Signaling message transmission and reception apparatus, characterized in that. The method of claim 17, And the signaling message is a session initialization protocol message. The method of claim 17, And transmitting an access identifier by mapping an access identifier to the signaling message. The method of claim 17, And the unsolicited guaranteed service establishes a connection by performing a dynamic service addition procedure. The method of claim 17, The first terminal receives a packet for transmitting the message from a packet received from a higher layer, checks a destination port number of the packet, identifies whether the packet includes a signaling message, and classifies a service flow as an unsolicited guaranteed service. Classifier, And a connection controller for mapping connection identifiers according to the classification and setting up an unsolicited guaranteed service connection for transmission of the signaling message. The method of claim 21, And the classifier and the access controller operate in a converging sublayer of a media access control layer. The method of claim 17, And a first base station for allocating a band for transmitting a signaling message to the first terminal at regular intervals according to the unsolicited guaranteed service connection setting. The method of claim 17, And the first terminal deletes the unsolicited guaranteed service when transmission and reception of the signaling message is terminated. The method of claim 17, And a second base station for allocating a band for transmitting a signaling message to the second terminal at regular intervals according to the unsolicited guaranteed service connection setting. The method of claim 17, The second terminal further comprises the step of deleting the unsolicited guaranteed service when the transmission and reception of the signaling message is terminated.

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