Patent Abstract:
An apparatus and method manage an operation mode of a mobile station in a wireless communication system. Here, a method for managing an operation mode of a Mobile Station (MS) that uses a service of a strict interactive response time in a Base Station (BS) of a wireless communication system includes determining a supportable operation mode of the MS considering at least one of a service type of the MS, an interactive response time required condition of the service, and a user profile of the MS, and sending the MS a control message including the supportable operation mode of the MS.

Full Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) AND CLAIM OF PRIORITY 
       [0001]    The present application is related to and claims priority under 35 U.S.C. §119(a) to a Korean Patent Application filed in the Korean Intellectual Property Office on Aug. 24, 2010 and assigned Serial No. 10-2010-0081770, the contents of which are herein incorporated by reference. 
       TECHNICAL FIELD OF THE INVENTION 
       [0002]    The present invention relates to a wireless communication system. More particularly, the present invention relates to an apparatus and method for managing an operation mode of a Mobile Station (MS) in a wireless communication system. 
       BACKGROUND OF THE INVENTION 
       [0003]    In a wireless communication system, an MS can operate in a connected state and an idle state for the sake of reduction of power consumption and efficient management of a wireless resource of a Base Station (BS), after network entry. Here, the connected state includes a sleep mode and an active mode. For instance, in a case where the MS is in the active mode, the MS maintains at least one connection with the BS. At this time, the MS can make a transition to the sleep mode so as to decrease the power consumption. 
         [0004]    In a case where the MS operates in the idle state, the MS is not registered to the BS, and operates in a Paging Available Interval (PAI) and a Paging Unavailable Interval (PUI). In this case, the MS monitors paging only in the PAI. Accordingly, in a case where a traffic that the BS will transmit to the MS operating in the idle state is generated, the BS performs paging as illustrated in  FIG. 1  below. 
         [0005]      FIG. 1  illustrates a procedure for performing paging to an MS that is in an idle state according to the conventional art. 
         [0006]    As illustrated in  FIG. 1 , in a case where an MS  110  operates in an idle state, the MS  110  monitors paging during a PAI. On the other hand, the MS  110  transmits/receives no signal during a PUI. 
         [0007]    In a case where a BS  100  recognizes traffic generation for the MS  110 , if a PAI of the MS  110  arrives, the BS  100  performs paging ( 120 ) to the MS  110 . That is, the BS  100  waits during a PUI of the MS  110 . 
         [0008]    The MS  110  performs a network reentry procedure ( 130 ) if paging to itself is detected during a PAI. On the other hand, the MS  110  enters a PUI if no paging to itself is detected during the PAI. 
         [0009]    In a case where the MS  110  operates in the idle state as above, the wireless communication system generates a paging delay pending the paging to the MS  110  until before the PAI and a network reentry delay resulting from network reentry of the MS  110 . 
         [0010]    A service for emergency such as a disaster requires a strict interactive response time of an MS. However, in a case where the MS using the emergency service operates in the idle state, there is a problem that the MS cannot meet the interactive response time required for the emergency service due to the paging delay, the network reentry delay and the like. 
       SUMMARY OF THE INVENTION 
       [0011]    To address the above-discussed deficiencies of the prior art, it is a primary object to provide at least the advantages below. Accordingly, one aspect of the present disclosure is to provide an apparatus and method for reducing a response delay of a Mobile Station (MS) operating in an idle state in a wireless communication system. 
         [0012]    Another aspect of the present disclosure is to provide an apparatus and method for managing an operation mode of an MS in a wireless communication system. 
         [0013]    A further aspect of the present disclosure is to provide an apparatus and method for restricting an operation mode of an MS in a Base Station (BS) of a wireless communication system. 
         [0014]    Yet another aspect of the present disclosure is to provide an apparatus and method for managing an operation mode to which an MS can make a transition through a negotiation between a BS and the MS in a wireless communication system. 
         [0015]    Still another aspect of the present disclosure is to provide an apparatus and method for managing an operation mode to which an MS can make a transition through a Dynamic Service Addition/Change/Deletion (DSx) procedure in a BS of a wireless communication system. 
         [0016]    Still another aspect of the present disclosure is to provide an apparatus and method for managing an operation mode to which an MS can make a transition through a registration procedure of the MS in a BS of a wireless communication system. 
         [0017]    The above aspects are achieved by providing an apparatus and method for managing an operation mode of a mobile station in a wireless communication system. 
         [0018]    According to one aspect of the present disclosure, a method for managing an operation mode of an MS that uses a service of a strict interactive response time in a BS of a wireless communication system is provided. The method includes determining a supportable operation mode of the MS considering at least one of a service type of the MS, an interactive response time required condition of the service, and a user profile of the MS, and sending the MS a control message including the supportable operation mode of the MS. 
         [0019]    According to another aspect of the present disclosure, a method for controlling an operation mode in an MS of a wireless communication system is provided. The method includes determining, from a control message provided from the BS, a supportable operation mode of the MS determined from considering at least one of a service type of the MS, an interactive response time required condition of a service, and a user profile of the MS, and determining a supportable operation mode on the basis of the supportable operation mode of the MS. 
         [0020]    According to a further aspect of the present disclosure, an apparatus for managing an operation mode of an MS that uses a service of a strict interactive response time in a BS of a wireless communication system is provided. The apparatus includes an operation mode manager and a transmitter. The operation mode manager determines a supportable operation mode of the MS considering at least one of a service type of the MS, an interactive response time required condition of the service, and a user profile of the MS. The transmitter sends the MS a control message including the supportable operation mode of the MS. 
         [0021]    According to a yet another aspect of the present disclosure, an apparatus for controlling an operation mode in an MS of a wireless communication system is provided. The apparatus includes a receiver and a controller. The receiver receives a control message from a BS. The controller determines the MS supportable operation mode based on a supportable operation mode of the MS determined considering at least one of a service type of the MS, an interactive response time required condition of a service, and a user profile of the MS in the control message provided from the BS through the receiver. 
         [0022]    Before undertaking the DETAILED DESCRIPTION OF THE INVENTION below, it may be advantageous to set forth definitions of certain words and phrases used throughout this patent document: the terms “include” and “comprise,” as well as derivatives thereof, mean inclusion without limitation; the term “or,” is inclusive, meaning and/or; the phrases “associated with” and “associated therewith,” as well as derivatives thereof, may mean to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to or with, have, have a property of, or the like. Definitions for certain words and phrases are provided throughout this patent document, those of ordinary skill in the art should understand that in many, if not most instances, such definitions apply to prior, as well as future uses of such defined words and phrases. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0023]    The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which: 
           [0024]      FIG. 1  illustrates a procedure for performing paging to a Mobile Station (MS) that is in an idle state according to the conventional art; 
           [0025]      FIG. 2  is a ladder diagram illustrating a procedure for restricting an operation mode of an MS using a Dynamic Service Addition (DSA) message in a wireless communication system according to the present disclosure; 
           [0026]      FIG. 3  illustrates a process for restricting an operation mode of an MS using a DSA message in a Base Station (BS) according to the present disclosure; 
           [0027]      FIG. 4  illustrates a process for determining operation mode information through a DSA message in an MS according to the present disclosure; 
           [0028]      FIG. 5  is a ladder diagram illustrating a procedure for restricting an operation mode of an MS using a registration message in a wireless communication system according to the present disclosure; 
           [0029]      FIG. 6  illustrates a process for restricting an operation mode of an MS using a registration message in a BS according to the present disclosure; 
           [0030]      FIG. 7  illustrates a process for determining operation mode information through a registration message in an MS according to the present disclosure; 
           [0031]      FIG. 8  is a block diagram illustrating a construction of a BS according to the present disclosure; and 
           [0032]      FIG. 9  is a block diagram illustrating a construction of an MS according to the present disclosure. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0033]      FIGS. 2 through 9 , discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged wireless communication system. Embodiments of the present invention will be described herein below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Terms described below, which are defined considering functions in the present invention, can be different depending on user and operator&#39;s intention or practice. Therefore, the terms should be defined based on the disclosure throughout this specification. Preferred embodiments of the present invention will be described herein below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. And, terms described below, which are defined considering functions in the present invention, can be different depending on user and operator&#39;s intention or practice. Therefore, the terms should be defined based on the disclosure throughout this specification. 
         [0034]    Below, exemplary embodiments of the present disclosure provide technology for restricting an operation mode of a Mobile Station (MS) in a wireless communication system. 
         [0035]    Below, exemplary embodiments of the present disclosure provide technology for restricting an operation mode of an MS according to an interactive response time of a service having a strict interactive response time required condition in a wireless communication system. 
         [0036]    The following description is made, for example, for a wireless communication system defined in the Institute of Electrical and Electronics Engineers (IEEE) 802.16m standard. However, the present disclosure is also applicable to wireless communication systems defined in other standards. 
         [0037]    As illustrated in  FIG. 2  below, a Base Station (BS) and an MS of the wireless communication system can negotiate an operation mode of the MS through a Dynamic Service Addition/Change/Deletion (DSx) procedure. Here, the DSx procedure includes a process in which the BS and the MS exchange a DSx message with each other for service addition/change/deletion. 
         [0038]      FIG. 2  illustrates a procedure for restricting an operation mode of an MS using a Dynamic Service Addition (DSA) message in a wireless communication system according to the present disclosure. In the following description, a BS  210  represents an Access Service Network (ASN) that includes a BS and an Access Service Network-GateWay (ASN-GW). 
         [0039]    As illustrated in  FIG. 2 , an MS  200  performs initial network entry through a BS  210  (step  221 ). 
         [0040]    After the initial network entry of the MS  200  is completed, the MS  200  and BS  210  generate a service flow (step  223 ). For example, the MS  200  and BS  210  generate an initial/pre-provisioned service flow. 
         [0041]    The MS  200  performs upper signaling with an upper network entity through the generated service flow (step  225 ). For example, the MS  200  initiates an application program for upper signaling and performs the upper signaling with the upper network entity through the BS  210 . Here, the upper network entity includes an application server, and the upper signaling includes Session Initialization Protocol (SIP) protocol signaling. 
         [0042]    The BS  210  determines a service type of the MS  200  and an interactive response time required condition of a service using an upper signaling message provided from the upper network entity. For example, the BS  210  determines an operation mode supportable by the MS  200  in consideration of the service type of the MS  200  and the interactive response time required condition of the service. 
         [0043]    After that, the BS  210  generates a DSA request message to establish a connection for application data transmission/reception. Here, the DSA request message includes operation mode information supportable by the MS  200  in a form of Table 1 below. 
         [0000]    
       
         
               
               
               
               
               
             
           
               
                 TABLE 1 
               
               
                   
               
               
                   
                 Attributes/Array 
                 Size 
                   
                   
               
               
                 M/O 
                 of attributes 
                 (bits) 
                 Value/Note 
                 Conditions 
               
               
                   
               
             
             
               
                 0 
                 AMS Operation  
                 2 
                 Bit 0: Sleep mode support 
                   
               
               
                   
                 Mode Supported 
                   
                 Bit 1: Idle mode support 
                   
               
               
                   
                   
                   
                 A bit value of 0 indicates 
                   
               
               
                   
                   
                   
                 “not supported” while 1 
                   
               
               
                   
                   
                   
                 indicates “supported.” 
               
               
                   
               
             
          
         
       
     
         [0044]    In Table 1 above, in an example where the BS  210  restricts idle state transition of the MS  200 , the supportable operation mode information of the MS  200  is set to “0b10”. In contrast, in an example where the BS  210  restricts sleep mode transition of the MS  200  and permits the idle state transition of the MS  200 , the supportable operation mode information of the MS  200  is set to “0b01”. 
         [0045]    The BS  210  sends the MS  200  the DSA request message including the operation mode information supportable by the MS  200  (step  227 ). 
         [0046]    The MS  200  determines the supportable operation mode information of the MS  200  included in the DSA request message. At this time, the MS  200  determines an operation mode that the MS  200  will support itself based on the supportable operation mode information of the MS  200  included in the DSA request message. For another example, the MS  200  may determine whether to accept the supportable operation mode information of the MS  200  included in the DSA request message. 
         [0047]    After that, the MS  200  sends the BS  210  a DSA response message including the MS&#39;s  200  supportable operation mode information (step  229 ). For example, the MS  200  transmits the MS&#39;s  200  determining operation mode information to the BS  210  using the DSA response message, based on the supportable operation mode information of the MS  200  included in the DSA request message. For another example, the MS  200  may transmit an acceptance or non-acceptance of the supportable operation mode information of the MS  200  included in the DSA request message to the BS  210 , using the DSA response message. 
         [0048]    If the DSA response message is received, the BS  210  sets a packet classification rule, and sends a DSA ACKnowledgement (ACK) message to the MS  200  (step  231 ). 
         [0049]    Next, the MS  200  and BS  210  perform a service (step  233 ). At this time, the MS  200  can perform a state transition within a supportable operation mode determined through a negotiation with the BS  210 . 
         [0050]    In an example where the MS  200  or the BS  210  makes a request for application service termination in course of the service performance, the MS  200  and BS  210  determine whether to terminate the service performance between the MS  200  and the BS  210  through the upper signaling with the upper network entity. 
         [0051]    In an example where the MS  200  and BS  210  determine to terminate the service performance, the BS  210  determines an operation mode that is supportable by the MS  200  after service termination. 
         [0052]    After that, the BS  210  sends the MS  200  a DSD request message including operation mode information that is supportable by the MS  200  after service termination (step  235 ). 
         [0053]    The MS  200  determines, in the DSD request message, the operation mode information that is supportable by the MS  200  after the service termination. At this time, the MS  200  determines an operation mode that the MS  200  will support the MS  200  based on the operation mode information supportable by the MS  200  after the service termination included in the DSD request message. For another example, the MS  200  may determine whether to accept the operation mode information supportable by the MS  200  after the service termination included in the DSD request message. 
         [0054]    Next, the MS  200  sends the BS  210  a DSD response message including the MS&#39;s  200  supportable operation mode information (step  237 ). For example, the MS  200  transmits the MS&#39;s  200  determining operation mode information to the BS  210  using the DSD response message, based on the supportable operation mode information of the MS  200  included in the DSD request message. For another example, the MS  200  may transmit an acceptance or non-acceptance of the supportable operation mode information of the MS  200  included in the DSD request message to the BS  210 , using the DSD response message. 
         [0055]    The BS  210  sends the MS  200  a DSD ACK message in response to the DSD response message (step  239 ). 
         [0056]    In an example where the DSD ACK message is received, the MS  200  can perform a state transition within the supportable operation mode determined through the negotiation with the BS  210 . 
         [0057]    As described above, an MS  200  and a BS  210  negotiate a supportable operation mode using a DSx message. At this time, in an example where the MS  200  provides a Push To Talk (PTT) service, the MS  200  and BS  210  generate or release a service flow for the PTT service through a DSx procedure. At this time, when the MS  200  and BS  210  generate and release the service flow for the PTT service, the MS  200  and BS  210  can negotiate an operation mode supportable by the MS  200 . Here, the PTT service includes a service for emergency. 
         [0058]      FIG. 3  illustrates a procedure for restricting an operation mode of an MS using a DSA message in a BS according to the present disclosure. In the following description, it is assumed to provide a PTT service to the MS. However, it is identically applicable even to an example of providing other service sensitive to a delay to the MS. 
         [0059]    Referring to  FIG. 3 , in step  301 , the BS performs an initial network entry procedure of an MS. For example, the BS performs a ranging procedure, an authentication procedure, a registration procedure, and a capability negotiation procedure with the MS to complete the initial network entry procedure of the MS. 
         [0060]    After initial network entry of the MS, the BS proceeds to step  303  and transmits/receives a signal for upper signaling between the MS and an upper network entity. For example, the BS generates a service flow with the MS after the initial network entry of the MS. And then, the BS controls such that the MS and the upper network entity perform the upper signaling through the generated service flow. 
         [0061]    Next, the BS proceeds to step  305  and determines a supportable operation mode of the MS using an upper signaling message provided from the upper network entity. For example, the BS determines whether to generate a new service flow/connection with the MS and, if determining to generate the new service flow/connection with the MS, the BS determines an operation mode supportable by the MS considering a service type of the MS or an interactive response time required condition of a service. Here, the service type or the interactive response time required condition is determined using the upper signaling message. In an example where a service newly established with the MS is a service sensitive to an interactive response delay of the MS such as a PTT service, the BS does not permit an idle state transition of the MS. On the other hand, in an example where the BS manages the idle state transition of the MS for the purpose of PTT service capability increment, the BS may restrict a sleep mode transition of the MS, and permit the idle state transition of the MS. 
         [0062]    After determining the supportable operation mode of the MS, the BS proceeds to step  307  and restricts the supportable operation mode of the MS using a DSA message. For instance, the BS sends the MS a DSA request message including the supportable operation mode information of the MS determined in step  305 . And then, the BS recognizes supportable operation mode information of the MS included in a DSA response message provided from the MS as the supportable operation mode of the MS while a service flow/connection newly generated through the DSA procedure is kept. 
         [0063]    After restricting the supportable operation mode of the MS, the BS proceeds to step  309  and provides an application service to the MS through the service flow/connection generated through the DSA procedure. Here, the application service includes application services sensitive to a delay of an interactive response time of an MS such as a PTT service. 
         [0064]    Next, the BS proceeds to step  311  and determines whether to terminate the application service with the MS. For example, in an example where the MS or the BS makes a request for application service termination in course of application service provision, the MS and BS determine whether to terminate application service performance through upper signaling with the upper network entity. 
         [0065]    In an example where the MS and BS determine not to terminate the application service, the BS returns to step  309  and provides the application service to the MS. 
         [0066]    On the other hand, in an example where the MS and BS determine to terminate the application service, the BS proceeds to step  313  and determines an operation mode supportable by the MS after application service termination. 
         [0067]    After determining the operation mode supportable by the MS after the application service termination, the BS proceeds to step  315  and restricts the supportable operation mode of the MS using a DSD message. For instance, the BS sends the MS a DSD request message including the supportable operation mode information of the MS determined in step  313 . And then, the BS recognizes supportable operation mode information of the MS included in a DSD response message provided from the MS as the operation mode supportable by the MS after the application service termination. 
         [0068]    After that, the BS terminates the algorithm according to the present disclosure. 
         [0069]      FIG. 4  illustrates a procedure for determining operation mode information through a DSA message in an MS according to the present disclosure. 
         [0070]    Referring to  FIG. 4 , in step  401 , the MS performs an initial network entry procedure through a BS. For example, the MS performs a ranging procedure, an authentication procedure, a registration procedure, and a capability negotiation procedure with the BS to complete the initial network entry procedure. 
         [0071]    After that, the MS proceeds to step  403  and initiates an application program for upper signaling. For instance, after completing the initial network entry, the MS generates a service flow with the BS. And then, the MS initiates the application program for the upper signaling. 
         [0072]    After initiating the application program, the MS proceeds to step  405  and performs upper signaling with an upper network entity through the BS. Here, the upper network entity includes an application server, and the upper signaling includes SIP protocol signaling. 
         [0073]    Next, the MS proceeds to step  407  and determines supportable operation mode information through a DSA message for generating a new service flow/connection with the BS. For example, the MS determines the MS&#39;s supportable operation mode information included in a DSA request message provided from the BS. And then, the MS determines the MS&#39;s own supportable operation mode based on the MS&#39;s supportable operation mode information included in the DSA request message. At this time, the MS transmits the MS&#39;s determining supportable operation mode information to the BS through a DSA response message. For another example, the MS may recognize the MS&#39;s supportable operation mode information included in the DSA request message as the MS&#39;s supportable operation mode information. 
         [0074]    After determining the supportable operation mode information, the MS proceeds to step  409  and receives an application service from the BS through the service flow/connection generated through the DSA procedure. At this time, the MS can perform a state transition within the supportable operation mode determined in step  407 . 
         [0075]    Next, the MS proceeds to step  411  and determines whether to terminate the application service with the BS. For example, the MS or the BS makes a request for application service termination in course of application service provision; the MS and BS determine whether to terminate application service performance through upper signaling with the upper network entity. 
         [0076]    In an example where the MS and BS determine not to terminate the application service in step  411 , the MS returns to step  409  and receives the application service from the BS. 
         [0077]    In contrast, in an example where the MS and BS determine to terminate the application service in step  411 , the MS proceeds to step  413  and performs upper signaling for the application service termination with the upper network entity through the BS. 
         [0078]    After that, the MS proceeds to step  415  and determines an operation mode supportable after application service termination. For example, the MS determines the MS&#39;s supportable operation mode information included in a DSD request message provided from the BS. And then, the MS determines the MS&#39;s supportable operation mode based on the MS&#39;s supportable operation mode information included in the DSD request message. At this time, the MS transmits the MS&#39;s determining supportable operation mode information to the BS through a DSD response message. For another example, the MS may recognize the MS&#39;s supportable operation mode information included in the DSD request message as the MS&#39;s supportable operation mode information. 
         [0079]    Next, the MS terminates the algorithm according to the present disclosure. 
         [0080]    In the aforementioned example, an MS and a BS restrict a supportable operation mode of the MS through a DSx procedure. 
         [0081]    In another example, an MS and a BS may restrict a supportable operation mode of the MS in an initial network entry process of the MS. At this time, the MS and BS may restrict the supportable operation mode of the MS through a registration procedure as illustrated in  FIG. 5  below. 
         [0082]      FIG. 5  illustrates a procedure for restricting an operation mode of an MS using a registration message in a wireless communication system according to the present disclosure. In the following description, a BS  510  represents an ASN that includes a BS and an ASN-GW. 
         [0083]    As illustrated in  FIG. 5 , an MS  500  performs initial network entry through a BS  510 . For example, the MS  500  and the BS  510  perform a ranging procedure, an authentication procedure, a registration procedure, and a capability negotiation procedure for the sake of network entry of the MS  500 . The BS  510  acquires a user profile for the MS  500  from an Authentication, Authorization and Accounting (AAA) server  520  through the authentication procedure (step  531 ). Here, the user profile includes a user identity, user&#39;s service subscription information, user state information and the like. 
         [0084]    Next, the MS  500  and the BS  510  negotiate a supportable operation mode of the MS  500  through the registration procedure (step  533 ). For instance, the MS  500  sends a registration request message to the BS  510 . The BS  510  determines the supportable operation mode of the MS  500  considering the user profile. And then, the BS  510  sends the MS  500  a registration response message including the MS&#39;s determining supportable operation mode information of the MS  500 . 
         [0085]    For another example, the MS  500  sends the BS  510  a registration request message including the MS&#39;s determining supportable operation mode information. The BS  510  determines a supportable operation mode of the MS  500  considering the supportable operation mode of the MS  500  determined in the registration request message and the user profile. And then, the BS  510  sends the MS  500  a registration response message including the MS&#39;s determining supportable operation mode information of the MS  500 . 
         [0086]    If a network entry procedure with the BS  510  is completed, the MS  500  performs upper signaling through the BS  510  (step  535 ). For example, after the initial network entry of the MS  500  is completed, the MS  500  and BS  510  generate an initial/pre-provisioned service flow, and initiate an application program for upper signaling. And then, the MS  500  performs upper signaling such as SIP protocol signaling, with an upper network entity such as an application server through the BS  510 . 
         [0087]    In an example where the BS  510  determines to generate a new service flow/connection with the MS  500 , the BS  510  performs a DSA procedure with the MS  500  (step  537 ). For example, the BS  510  sends a DSA request message to the MS  500 . In response to the DSA request message, the MS  500  sends a DSA response message to the BS  510 . In response to the DSA response message, the BS  510  sends the MS  500  a DSA ACK message to generate a new service flow/connection. 
         [0088]    After generating the new service flow/connection through the DSA procedure, the BS  510  sends an ACK message for upper signaling to the MS  500  (step  539 ). 
         [0089]    Next, the MS  500  and BS  510  perform a service (step  541 ). At this time, the MS  500  can perform a state transition within the supportable operation mode determined through the negotiation with the BS  510 . 
         [0090]    As described above, an MS  500  and a BS  510  negotiate a supportable operation mode of the MS  500  using a registration request/response message. At this time, the registration request/response message includes supportable operation mode information of the MS  500  in a form of Table 1 above. 
         [0091]      FIG. 6  illustrates a procedure for restricting an operation mode of an MS using a registration message in a BS according to the present disclosure. In the following description, it is assumed that a supportable operation mode of the MS is determined in the BS. 
         [0092]    Referring to  FIG. 6 , in step  601 , the BS performs an authentication procedure of an MS. At this time, the BS acquires a user profile for the MS from an AAA server through the authentication procedure of the MS. Here, the user profile includes a user identity, user&#39;s service subscription information, user state information and the like. 
         [0093]    After that, the BS proceeds to step  603  and determines a supportable operation mode of the MS according to a service type of the MS or a service required condition of the MS, which is included in the user profile. For example, in an example where a service newly established with the MS is a service sensitive to an interactive response delay of the MS such as a PTT service, the BS does not permit an idle state transition of the MS. For another example, in an example where the BS manages the idle state transition of the MS for the purpose of P a service capability increment, the BS may restrict a sleep mode transition of the MS, and permit the idle state transition of the MS. 
         [0094]    After determining the supportable operation mode of the MS in step  603 , the BS proceeds to step  605  and restricts the supportable operation mode of the MS using a registration message. For example, after the authentication procedure is completed, the MS sends the BS a registration request message. The BS sends the MS a registration response message including the supportable operation mode information of the MS determined in step  603 . At this time, the registration response message includes the supportable operation mode information of the MS in a form of Table 1 above. 
         [0095]    After restricting the supportable operation mode of the MS in step  605 , the BS proceeds to step  607  and transmits/receives a signal for upper signaling between the MS and an upper network entity. For example, after initial network entry of the MS, the BS generates an initial/pre-provisioned service flow with the MS. And then, the BS controls such that the MS and the upper network entity perform upper signaling through the generated service flow. 
         [0096]    Next, the BS proceeds to step  609  and performs a DSA procedure with the MS to generate a new service flow/connection. For instance, the BS determines whether to generate a new service flow/connection with the MS and, if determining to generate the new service flow/connection with the MS, the BS generates a new service flow/connection through the DSA procedure with the MS. 
         [0097]    After generating the new service flow/connection in step  609 , the BS proceeds to step  611  and provides an application service to the MS through the service flow/connection generated through the DSA procedure. 
         [0098]    After that, the BS terminates the algorithm according to the present disclosure. 
         [0099]      FIG. 7  illustrates a procedure for determining operation mode information through a registration message in an MS according to the present disclosure. In the following description, it is assumed that a supportable operation mode of the MS is determined in a BS. 
         [0100]    Referring to  FIG. 7 , in step  701 , the MS determines operation mode information through a registration message. For example, after performing an authentication procedure with a BS for initial network entry, the MS sends a registration request message to the BS. And then, the MS determines supportable operation mode information in a registration response message provided from the BS. 
         [0101]    After that, the MS proceeds to step  703  and initiates an application program for upper signaling. For example, after the initial network entry is completed, the MS generates an initial/pre-provisioned service flow with the BS. And then, the MS initiates the application program for upper signaling. 
         [0102]    After initiating the application program, the MS proceeds to step  705  and performs upper signaling with an upper network entity through the BS. Here, the upper network entity includes an application server, and the upper signaling includes SIP protocol signaling. 
         [0103]    Next, the MS proceeds to step  707  and performs a DSA procedure for the sake of generation of a new service flow/connection with the BS. 
         [0104]    After generating the new service flow/connection through the DSA procedure, the MS proceeds to step  709  and receives an application service from the BS through the service flow/connection generated through the DSA procedure. At this time, the MS can perform a state transition within the supportable operation mode determined in step  701 . 
         [0105]    Next, the MS terminates the algorithm according to the present disclosure. 
         [0106]    In the aforementioned example, after performing an authentication procedure with a BS, an MS sends a registration request message to the BS. In response to the registration request message, the BS sends the MS a registration response message including supportable operation mode information of the MS determined using a user profile of the MS. 
         [0107]    In another example, an MS sends the BS a registration request message including the MS&#39;s determining supportable operation mode information. In this example, the BS determines a supportable operation mode of the MS considering the supportable operation mode of the MS determined in the registration request message and the user profile. And then, the BS sends the MS a registration response message including the MS&#39;s determining supportable operation mode information of the MS. 
         [0108]      FIG. 8  illustrates a construction of a BS according to the present disclosure. 
         [0109]    As illustrated in  FIG. 8 , the BS includes a duplexer  800 , a receiver  810 , a message processor  820 , a controller  830 , an operation mode manager  840 , a message generator  850 , and a transmitter  860 . 
         [0110]    The duplexer  800  transmits a transmit signal provided from the transmitter  860  through an antenna according to a duplexing scheme, and provides a receive signal from the antenna to the receiver  810 . 
         [0111]    The receiver  810  converts a Radio Frequency (RF) signal provided from the duplexer  800  into a baseband signal for demodulation. The receiver  810  can include an RF processing block, a demodulation block, a channel decoding block and the like. For example, the RF processing block converts an RF signal provided from the duplexer  800  into a baseband signal. The demodulation block is composed of a Fast Fourier Transform (FFT) operator for extracting data loaded on each subcarrier from a signal provided from the RF processing block and the like. The channel decoding block is composed of a demodulator, a de-interleaver, a channel decoder and the like. 
         [0112]    The message processor  820  extracts a control message from a receive signal provided from the receiver  810  and transmits the control message to the controller  830 . For instance, the message processor  820  extracts a DSA response message or a DSD response message from the receive signal and transmits the extracted message to the controller  830 . For another instance, the message processor  820  extracts a registration request message from the receive signal and sends the extracted message to the controller  830 . 
         [0113]    The controller  830  controls a general operation of the BS. 
         [0114]    The controller  830  restricts an operation mode of the MS using supportable operation mode information of an MS determined in the operation mode manager  840 . For example, as illustrated in  FIG. 3 , the controller  830  controls to transmit the supportable operation mode information of the MS determined in the operation mode manager  840  to the MS through a DSx request message. For another example, as illustrated in  FIG. 6 , the controller  830  controls to transmit the supportable operation mode information of the MS determined in the operation mode manager  840  to the MS through a registration response message. 
         [0115]    The operation mode manager  840  determines a supportable operation mode of an MS. For example, in an example where a service newly established with the MS is sensitive to an interactive response delay of the MS such as a PTT service, the operation mode manager  840  does not permit an idle state transition of the MS. For another example, in an example where the BS manages the idle state transition of the MS for the purpose of PTT service capability increment, the operation mode manager  840  may restrict a sleep mode transition of the MS, and permit the idle state transition of the MS. 
         [0116]    The message generator  850  generates a control message to be sent to an MS according to the control of the controller  830 . For instance, the message generator  850  generates a DSx request message including supportable operation mode information of an MS determined in the operation mode manager  840  according to the control of the controller  830 . For another instance, the message generator  850  generates a registration response message including supportable operation mode information of an MS determined in the operation mode manager  840  according to the control of the controller  830 . 
         [0117]    The transmitter  860  encodes data and control message to be transmitted to an MS, converts the data and control message into an RF signal, and transmits the RF signal to the duplexer  800 . For instance, the transmitter  860  can include a channel coding block, a modulation block, an RF processing block and the like. Here, the channel coding block is composed of a modulator, an interleaver, a channel encoder and the like. The modulation block is composed of an Inverse Fast Fourier Transform (IFFT) operator for mapping a signal provided from the channel coding block to each subcarrier and the like. The RF processing block converts a baseband signal provided from the modulation block into an RF signal and outputs the RF signal to the duplexer  800 . 
         [0118]    In the aforementioned construction, the controller  830 , a protocol controller, can perform a function of the operation mode manager  840 . These are separately constructed in order to distinguish and describe respective functions in the present disclosure. Thus, in an actual realization, construction can be such that all or some of the functions are processed in the controller  830 . 
         [0119]      FIG. 9  illustrates a construction of an MS according to the present disclosure. 
         [0120]    As illustrated in  FIG. 9 , the BS includes a duplexer  900 , a receiver  910 , a message processor  920 , a controller  930 , a message generator  940 , and a transmitter  950 . 
         [0121]    The duplexer  900  transmits a transmit signal provided from the transmitter  950  through an antenna according to a duplexing scheme, and provides a receive signal from the antenna to the receiver  910 . 
         [0122]    The receiver  910  converts a Radio Frequency (RF) signal provided from the duplexer  900  into a baseband signal for demodulation. The receiver  910  can include an RF processing block, a demodulation block, a channel decoding block and the like. For example, the RF processing block converts an RF signal provided from the duplexer  900  into a baseband signal. The demodulation block is composed of a Fast Fourier Transform (FFT) operator for extracting data loaded on each subcarrier from a signal provided from the RF processing block and the like. The channel decoding block is composed of a demodulator, a de-interleaver, a channel decoder and the like. 
         [0123]    The message processor  920  extracts a control message from a receive signal provided from the receiver  910  and transmits the control message to the controller  930 . For instance, the message processor  920  extracts a DSA request message or a DSD request message from the receive signal and transmits the extracted message to the controller  930 . For another instance, the message processor  920  extracts a registration response message from the receive signal and sends the extracted message to the controller  930 . 
         [0124]    The controller  930  controls a general operation of the MS. For example, as illustrated in  FIG. 4 , the controller  930  determines the MS&#39;s supportable operation mode information according to supportable operation mode information included in a DSx request message provided from the BS. For another example, as illustrated in  FIG. 7 , the controller  930  determines the MS&#39;s supportable operation mode information according to supportable operation mode information included in a registration response message provided from the BS. 
         [0125]    The message generator  940  generates a control message to be sent to a BS according to the control of the controller  930 . For instance, the message generator  940  generates a DSx response message including the MS&#39;s determining supportable operation mode information according to the control of the controller  930 . For another instance, the message generator  940  generates a registration request message including the MS&#39;s determining supportable operation mode information according to the control of the controller  930 . 
         [0126]    The transmitter  950  encodes data and control message to be transmitted to a BS, converts the data and control message into an RF signal, and transmits the RF signal to the duplexer  900 . For instance, the transmitter  950  can include a channel coding block, a modulation block, an RF processing block and the like. Here, the channel coding block is composed of a modulator, an interleaver, a channel encoder and the like. The modulation block is composed of an IFFT operator for mapping a signal provided from the channel coding block to each subcarrier and the like. The RF processing block converts a baseband signal provided from the modulation block into an RF signal and outputs the RF signal to the duplexer  900 . 
         [0127]    As described above, exemplary embodiments of the present disclosure have an advantage of, by restricting an operation mode to which an MS can make a transition through a negotiation between a BS and the MS, being capable of reducing a delay of an operation mode transition of the MS and smoothly providing an emergency service requiring a strict interactive response time in a wireless communication system. 
         [0128]    While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Technology Classification (CPC): 8