Abstract:
The present disclosure relates to a pre-5 th -Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4 th -Generation (4G) communication system such as Long Term Evolution (LTE). The present disclosure provides an operating method and apparatus for supporting a handover to support a high reliability and low latency service in a wireless communication system. The method of operating the terminal includes receiving data from a service via a first base station (BS), transmitting, to the first BS, a bearer establishment command message between the first BS and a second BS determined by movement information of the terminal, and receiving, from the second BS, data transmitted from the second BS via the established bearer between the first BS and the second BS.

Description:
CROSS-REFERENCE TO RELATED APPLICATION AND CLAIM OF PRIORITY 
       [0001]    The present application is related to and claims the benefit under 35 U.S.C. §119(a) of a Korean patent application filed in the Korean Intellectual Property Office on Oct. 30, 2015 and assigned Serial No. 10-2015-0152436, the entire disclosure of which is hereby incorporated by reference. 
       TECHNICAL FIELD 
       [0002]    The present disclosure relates to a wireless communication system, and more particularly, to a wireless communication system for providing a vehicle service. 
       BACKGROUND 
       [0003]    To meet the demand for wireless data traffic having increased since deployment of 4 th  generation (4G) communication systems, efforts have been made to develop an improved 5 th  generation (5G) or pre-5G communication system. Therefore, the 5G or pre-5G communication system is also called a ‘Beyond 4G Network’ or a ‘Post Long Term Evolution (LTE) System’. 
         [0004]    The 5G communication system is considered to be implemented in higher frequency (mmWave) bands, e.g., 60 GHz bands, so as to accomplish higher data rates. To decrease propagation loss of the radio waves and increase the transmission distance, the beamforming, massive multiple-input multiple-output (MIMO), Full Dimensional MIMO (FD-MIMO), array antenna, an analog beam forming, large scale antenna techniques are discussed in 5G communication systems. 
         [0005]    In addition, in 5G communication systems, development for system network improvement is under way based on advanced small cells, cloud Radio Access Networks (RANs), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), reception-end interference cancellation and the like. 
         [0006]    In the 5G system, Hybrid frequency shift keying (FSK) and quadrature amplitude modulation (FQAM) and sliding window superposition coding (SWSC) as an advanced coding modulation (ACM), and filter bank multi carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) as an advanced access technology have been developed. 
         [0007]    Recently, a wireless communication system is evolved to provide users with various services. For example, the wireless communication system uses a wireless communication technique to provide a vehicle service between a vehicle and another vehicle, between the vehicle and an infrastructure, between the vehicle and a pedestrian, between the vehicle and a driver, between the vehicle and a passenger, or the like. The vehicle service requires periodic transmission, low latency transmission, and high reliability transmission of vehicle service information. 
       SUMMARY 
       [0008]    To address the above-discussed deficiencies, it is a primary object to provide a method and apparatus for supporting a handover for a high reliability and low latency service in a wireless communication system. 
         [0009]    An exemplary embodiment of the present disclosure may provide a method of operating a terminal for supporting a handover. The method of operating the terminal includes receiving data from a service via a first Base Station (BS), transmitting, to the first BS, a bearer establishment command message between the first BS and a second BS related to movement information of the terminal, and receiving, from the second BS, data transmitted from the second BS via the established bearer between the first BS and the second BS. 
         [0010]    An exemplary embodiment of the present disclosure may provide a method of operating a first BS. The method of operating the first BS includes transmitting, to a terminal, data received from a server, receiving, from the terminal, a bearer establishment command message with respect to a second BS related to movement information of the terminal, establishing a bearer with respect to the second BS on the basis of the received bearer establishment command message, and transmitting, to the second BS, the data received from the server on the basis of the established bearer. 
         [0011]    An exemplary embodiment of the present disclosure may provide a method of operating a second BS. The method of operating the second BS includes receiving a bearer establishment request message from a first BS, establishing a bearer with respect to the first BS on the basis of the bearer establishment request message, receiving data from the first BS via the established bearer, and transmitting the received data to a terminal. 
         [0012]    An exemplary embodiment of the present disclosure may provide a method of operating a server. The method of operating the server includes transmitting data to a terminal via a first BS, receiving a bearer establishment command message from the terminal via the first BS, establishing a bearer with respect to a second BS related to movement information of the terminal on the basis of the bearer establishment command message, and transmitting data to the second BS on the basis of the established bearer. 
         [0013]    An exemplary embodiment of the present disclosure may provide a terminal device. The terminal device includes a transceiver, and a controller operatively coupled to the transceiver. The controller is configured for receiving data from a service via a first BS, transmitting, to the first BS, a bearer establishment command message between the first BS and a second BS related to movement information of the terminal, and receiving, from the second BS, data transmitted from the second BS via the established bearer. 
         [0014]    An exemplary embodiment of the present disclosure may provide a first BS device. The first BS device includes a transceiver, and a controller operatively coupled to the transceiver. The controller is configured for transmitting, to a terminal, data received from a server, receiving, from the terminal, a bearer establishment command message with respect to a second BS related to movement information of the terminal, establishing a bearer with respect to the second BS on the basis of the received bearer establishment command message, and transmitting, to the second BS, the data received from the server on the basis of the established bearer. 
         [0015]    An exemplary embodiment of the present disclosure may provide a second BS device. The second BS device includes a transceiver, and a controller operatively coupled to the transceiver. The controller is configured for receiving a bearer establishment request message from a first BS, establishing a bearer with respect to the first BS on the basis of the bearer establishment request message, receiving data from the first BS via the established bearer, and transmitting the received data to a terminal. 
         [0016]    An exemplary embodiment of the present disclosure may provide a server device. The server device includes a communication unit, and a controller operatively coupled to the communication unit. The controller is configured for transmitting data to a terminal via a first BS, receiving a bearer establishment command message from the terminal, establishing a bearer with respect to a second BS related to movement information of the terminal on the basis of the bearer establishment command message, and transmitting data to the second BS on the basis of the established bearer. 
         [0017]    Various exemplary embodiments of the present specification provide a method capable of increasing user satisfaction by providing a low latency and high reliability service to a moving vehicular terminal or a terminal placed in a vehicle in a wireless communication system. 
         [0018]    Before undertaking the DETAILED DESCRIPTION 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; and the term “controller” means any device, system or part thereof that controls at least one operation, such a device may be implemented in hardware, firmware or software, or some combination of at least two of the same. It should be noted that the functionality associated with any particular controller may be centralized or distributed, whether locally or remotely. 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 
         [0019]    For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts: 
           [0020]      FIG. 1  illustrates an example of a wireless communication system for providing a vehicle service. 
           [0021]      FIG. 2A  illustrates a typical handover handling procedure in a wireless communication system. 
           [0022]      FIG. 2B  illustrates a brief handover handling procedure according to various exemplary embodiments of the present disclosure. 
           [0023]      FIG. 3  is a drawing for explaining the concept of a handover handling operation in a wireless communication system according to various exemplary embodiments of the present disclosure. 
           [0024]      FIG. 4  is a flowchart illustrating a handover operation according to various exemplary embodiments of the present disclosure. 
           [0025]      FIG. 5  illustrates a handover handling procedure in detail according to various exemplary embodiments of the present disclosure. 
           [0026]      FIG. 6  illustrates an operation of exchanging information between a terminal and a region managing server according to an exemplary embodiment of the present disclosure. 
           [0027]      FIG. 7  illustrates an operation of determining a pre-path region according to various embodiments of the present disclosure. 
           [0028]      FIG. 8A  and  FIG. 8B  illustrate an operation of determining a handover region according to various embodiments of the present disclosure. 
           [0029]      FIG. 9  illustrates a measurement procedure for determining a pre-path region and a handover region according to various embodiments of the present disclosure. 
           [0030]      FIG. 10A  and  FIG. 10B  are flowcharts illustrating an operation of determining a handover region according to various embodiments of the present disclosure. 
           [0031]      FIG. 11A  to  FIG. 11D  illustrate information indicating a pre-path region and a handover region according to various embodiments of the present disclosure. 
           [0032]      FIG. 12A  illustrates a procedure of delivering data by a Base Station (BS) in a pre-path region to other BSs according to an embodiment of the present disclosure. 
           [0033]      FIG. 12B  illustrates a procedure of delivering data by a BS in a pre-path region to other BSs according to another embodiment of the present disclosure. 
           [0034]      FIG. 13  illustrates a procedure of determining a time at which data is delivered by one BS in a pre-path region to other BSs according to an embodiment of the present disclosure. 
           [0035]      FIG. 14A  illustrates a handling procedure when entering a handover region according to an embodiment of the present disclosure. 
           [0036]      FIG. 14B  illustrates a handling procedure when entering a handover region according to another embodiment of the present disclosure. 
           [0037]      FIG. 15  is a flowchart illustrating a change in a handover operation mode depending on whether a user terminal is placed in a vehicle according to various embodiments of the present disclosure. 
           [0038]      FIG. 16  illustrates an operation of determining whether a user terminal is placed in a vehicle according to an embodiment of the present disclosure. 
           [0039]      FIG. 17A  illustrates a handover handling procedure when a user terminal is placed in a vehicle according to an embodiment of the present disclosure. 
           [0040]      FIG. 17B  illustrates a handover handling procedure when a user terminal is placed in a vehicle according to another embodiment of the present disclosure. 
           [0041]      FIG. 18  is a block diagram of a terminal according to various embodiments of the present disclosure. 
           [0042]      FIG. 19  is a block diagram of a source BS according to various embodiments of the present disclosure. 
           [0043]      FIG. 20  is a block diagram of a target BS according to various embodiments of the present disclosure. 
           [0044]      FIG. 21  is a block diagram of a server according to various embodiments of the present disclosure. 
       
    
    
     DETAILED DESCRIPTION 
       [0045]      FIGS. 1 through 21 , 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 telecommunication technologies. 
         [0046]    Various embodiments used hereinafter to describe  FIG. 1  to  FIG. 21  and principles of the present disclosure are for purposes only, and thus it should not be interpreted as being intended for limiting a scope of the present disclosure. Those ordinarily skilled in the art may understand that the principles of the present disclosure can be implemented in other devices or systems properly arranged. 
         [0047]    Exemplary embodiments of the present disclosure described hereinafter relate to a method for supporting a service which requires low latency transmission and high reliability transmission to a moving vehicular terminal (i.e., a User Equipment (UE)) or a terminal placed in a vehicle in a wireless communication system for providing a vehicle service, for example, a vehicle-to-device or vehicle-to-infrastructure vehicle communication system, i.e., a Vehicle to Everything (V2X) communication system. The wireless communication system supports a vehicle-to-device direct communication supporting a vehicle service between a vehicle and another vehicle, between the vehicle and an infrastructure, between the vehicle and a pedestrian, between the vehicle and a driver, between the vehicle and a passenger, or the like, or supports communication via a cellular Base Station (BS). The vehicle service includes a safety service such as an accident occurrence notification, a prior warning of rear-end collision, an emergency vehicle notification, or the like, a vehicle information service such as a parking facility notification, a navigation, a vehicle diagnosis, or the like, and a traffic information service such as a lane change notification, a road usage change notification, a regulated speed notification, or the like. The vehicle service requires periodic transmission, low latency transmission, and high reliability transmission of vehicle service information. Exemplary embodiments of the present disclosure provide a method and apparatus for supporting a handover for a high reliability and low latency service in a wireless communication system. 
         [0048]      FIG. 1  illustrates an example of a wireless communication system  100  for providing a vehicle service. 
         [0049]    Referring to  FIG. 1 , the wireless communication system  100  includes a network  110 , a BS  120 , a BS  130 , and a BS  140 , and a moving terminal  150 . An example of the network  110  includes an Evolved Packet Core (EPC). 
         [0050]    The network  110  can include a Mobility Management Entity (MME), a Serving Gateway (S-GW), and a Packet Data Network Gateway (P-GW). The MME has access information of the moving terminal  150  or information regarding capability of the moving terminal  150 , and the information is used for mobility management of the moving terminal  150 . The S-GW is used to support a handover executed between the moving terminal  150  and the BSs  120 ,  130 , and  140 . The P-GW allocates an Internet Protocol (IP) address to the moving terminal  150 . Further, the P-GW is used to support the S-PW used for the handover executed between the moving terminal  150  and the BSs  120 ,  130  and  140 . 
         [0051]    The network  110  can provide the vehicle service to the moving terminal  150  via the BSs  120 ,  130 , and  140 . In one embodiment, the network  110  can provide the vehicle service to the moving terminal  150  via the BS  120  existing on a movement path of the moving terminal  150 . The moving terminal  150  can execute a handover to the BS  130  or the BS  140  along with the movement path. When the handover is complete, the moving terminal  150  can receive the vehicle service provided from the network  110  via the BS  130  or the BS  140 . 
         [0052]    The BS  120  can determine to which BS the moving terminal  150  will execute the handover between the BS  130  and the BS  140 . In one embodiment, when the moving terminal  150  moves along with a movement path  160 , the BS  120  can determine that the moving terminal  150  will execute the handover to the BS  130 . 
         [0053]      FIG. 2A  illustrates a typical handover handling procedure in the wireless communication system  100 . 
         [0054]    Referring to  FIG. 2A , the moving terminal  150  transmits a measurement report message to the BS  120  existing on the movement path. The measurement report message can include measurement result for strength of signals (i.e. Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ)) between the moving terminal  150  and the BSs  120 ,  130 , and  140 . The BS  120  can determine a handover between the moving terminal  150  and the BS  130  on the basis of the measurement result included in the measurement report message. 
         [0055]    When it is determined to execute the handover, the BS  120  transmits a handover request message to the BS  130 . The BS  130  transmits a handover request ACKnowledgement (ACK) message to the BS  120  in response to the handover request message. The handover request ACK message can include a random access preamble and a Radio Network Temporary Identifier (RNTI) which are required by the moving terminal  150  to execute the handover to the BS  130 . 
         [0056]    Upon receiving the handover request ACK message, the BS  120  transmits an RRC Connection Reconfiguration (RRC Conn.Reconf) message to the moving terminal  150 . The RRC Conn.Reconf message can include information regarding the BS  130  and mobility control information (mobilityControlInfo) of the moving terminal  150 . Radio Resource Control (RRC) is used to control a radio resource between the terminal and the BS. 
         [0057]    The BS  120  can perform data forwarding to the BS  130 . In one embodiment, in case of being connected via an X2 interface between the BS  120  and the BS  130 , the BS  120  can directly perform data forwarding to the BS  130 . In another embodiment, in case of being connected via an S1 interface between the BS  120  and the BS  130 , the BS  120  can perform data forwarding to the BS  130  via the network  110 . 
         [0058]    The moving terminal  150  executes a handover by transmitting the random access preamble message to the BS  130 . The BS  130  transmits a random access ACK message to the moving terminal  150  in response to the random access preamble message. When the execution of the handover is complete, the moving terminal  150  can receive the vehicle service from the BS  130  through a Random Access CHannel (RACH). 
         [0059]      FIG. 2B  illustrates a brief handover handling procedure according to various embodiments of the present disclosure. 
         [0060]    Referring to  FIG. 2B , the BS  120  can establish a bearer with respect to the BS  130  before the handover is executed. When it is determined to execute the handover, the moving terminal  150  can receive the aforementioned vehicle service through an RACH from the BS  130  without the handover execution procedure according to the conventional technique. 
         [0061]      FIG. 3  is a drawing for explaining the concept of a handover handling operation in a wireless communication system  300  according to various embodiments of the present disclosure. 
         [0062]    An embodiment of the wireless communication system  300  of  FIG. 3  is for descriptive purposes only. Other embodiments of the wireless communication system  300  can also be used without departing from the scope of the present disclosure. 
         [0063]    Referring to  FIG. 3 , in addition to the wireless communication system  100  of  FIG. 1 , the wireless communication system  300  further includes a pre-path region  301 , a pre-path region  302 , a handover region  311 , a handover region  312 , and a handover region  313 . 
         [0064]    The pre-path region  301  and the pre-path region  302  can include at least two BSs related to mobility information of the moving terminal  150 . In one embodiment, according to the mobility information of the terminal, the pre-path region  301  can include the BS  120 , the BS  130 , and the BS  140 . Although the pre-path region  301  including the BS  120 , the BS  130 , and the BS  140  is illustrated in  FIG. 3 , a size of the pre-path region  301 , the number of included BSs, and whether the BS is included in an overlapping manner with another pre-path region are not limited. For example, the pre-path region  301  can include all of the BS  120 , the BS  130 , a BS  340 , and a BS  350 . The sizes of the pre-path region  301  and the pre-path region  302 , the number of included BSs, and whether the BS is included in an overlapping manner with another pre-path region can be determined by the network  110  on the basis of the mobility information of the moving terminal  150 . 
         [0065]    The handover region  311 , the handover region  312 , and the handover region  313  are sub-regions of the pre-path region  301  and the pre-path region  302 . A size of a handover region included in one pre-path region, the number of handover regions, and whether two or more pre-path regions include one handover region in an overlapping manner are not limited. In one embodiment, as shown in  FIG. 3 , the handover region  312  can be included in both of the pre-path region  301  and the pre-path region  302 . The size of the handover region included in one pre-path region, the number of handover regions, and whether two or more pre-path regions include one handover region in an overlapping manner can be determined by the network  110  on the basis of the mobility information of the moving terminal  150 . 
         [0066]    According to one embodiment of the present disclosure of  FIG. 3 , when the moving terminal  150  enters the pre-path region  301 , a bearer is established among the BSs  120 ,  130 , and  140  included in the pre-path region  301 . The BS  120  can perform data forwarding to the BS  120  or the BS  130  to execute the handover on the basis of the established bearer. 
         [0067]    According to one embodiment of the present disclosure of  FIG. 3 , when the moving terminal  150  enters the handover region  311 , the moving terminal  150  can execute an RACH operation with respect to the BS  130 . When the execution of the RACH operation is complete, the moving terminal  150  can receive a vehicle service from the network  110  via the BS  130 . 
         [0068]    Although the aforementioned method provides only an operation for executing the handover of the moving terminal  150  with respect to the BS  120  and the BS  130 , a bearer can be established among different BSs according to a movement path of the moving terminal  150 , and the moving terminal  150  can execute the handover with respect to the different BSs. For example, when the moving terminal  150  enters the pre-path region  302 , the BSs  340  and  350  included in the pre-path region  302  can establish the bearer. When the moving terminal  150  enters the handover region  312 , the moving terminal  150  can perform the RACH operation with respect to the BS  340 . When the terminal enters the handover region  313 , the moving terminal  150  can perform the RACH operation with respect to the BS  350 . 
         [0069]      FIG. 4  is a flowchart illustrating a handover operation according to various embodiments of the present disclosure. 
         [0070]    Referring to  FIG. 4 , in step  410 , the network  110  determines a pre-path region and a handover region on the basis of movement information of the moving terminal  150 . The movement information of the moving terminal  150  is transmitted from the moving terminal  150  via the BS  120  (or different BSs communicating with a different terminal). Information indicating the determined pre-path region and handover region is transmitted from a server to the moving terminal  150  via the BS  120 . Further, the information indicating the determined pre-path region and handover region can be transmitted to BSs included in the pre-path region. In one embodiment, the network  110  can determine the pre-path region  301  and the handover region  311  on the basis of the movement information of the moving terminal  150 . 
         [0071]    In step  420 , the moving terminal  150  can determine whether it enters the pre-path region determined by the server on the basis of the received information. When it enters the pre-path region, the moving terminal  150  can transmit a pre-path command message among BSs included in the pre-path region. In one embodiment, if the moving terminal  150  enters the pre-path region  310 , the moving terminal  150  can transmit to the BS  120  the pre-path command message among the BSs included in the pre-path region  301 . 
         [0072]    In step  430 , the BSs included in the pre-path region establishes a bearer. In one embodiment, the BSs  120 ,  130 , and  140  included in the pre-path region  301  can establish the bearer. The bearer establishment can be performed through an X2 interface or an S2 interface. 
         [0073]    In step  440 , the moving terminal  150  or the BSs included in the pre-path region can determine whether the moving terminal  150  enters the determined handover region. When the moving terminal  150  enters the determined handover region, the moving terminal  150  can execute a handover with respect to the BS included in the determined pre-path region (step  450 ). In one embodiment, the moving terminal  150  can execute a handover with respect to the BS  130  when entering the handover region  311  which is a sub-region of the pre-path region  301 . 
         [0074]      FIG. 5  illustrates a handover handling procedure in detail according to various embodiments of the present disclosure. 
         [0075]    Referring to  FIG. 5 , the network  110  can include an MME  510 , an S-GW  520 , a P-GW  540 , and a region managing server  530 . According to one embodiment of the present disclosure, the BS  120 , the BS  130 , and the BS  140  are included in the pre-path region  301 . The pre-path region  301  can include the handover region  311 . Although it is illustrated in  FIG. 5  that the moving terminal  150  executes a handover with respect to the BS  120 , the BS  130 , and the BS  140 , according to one embodiment of the present disclosure, the moving terminal  150  can execute the handover with respect to BSs included in a different pre-path region related to movement information. 
         [0076]    The moving terminal  150  can transmit the movement information of the moving terminal  150  to the region managing server  530 . Although it is illustrated in  FIG. 5  that the moving terminal  150  transmits the movement information to the region managing server  530 , the movement information can be transmitted to the region managing server  530  via a BS communicating with the moving terminal  150 . In one embodiment, the movement information can be transmitted periodically. As another embodiment, the movement information can be transmitted by the moving terminal  150  when an event occurs. For example, the moving terminal  150  can transmit the information to the region managing server  530  when an accident occurs. 
         [0077]    The region managing server  530  can determine a pre-path region and handover region related to a movement path of the moving terminal  150  on the basis of the received movement information. Information indicating the determined pre-path region and handover region can be transmitted from the region managing server  530  to the moving terminal  150 . Further, the information indicating the determined pre-path region and handover region can be transmitted from a server to BSs included in the determined pre-path region. In one embodiment, the network  110  can transmit information indicating the pre-path region  301  and the handover region  311  to the BSs  120 ,  130 , and  140  included in the pre-path region  301 . 
         [0078]    When the moving terminal  150  enters the determined pre-path region, the moving terminal  150  can transmit a pre-path command message to the BS included in the pre-path region. The pre-path command message can be a pre-path command message for an X2 interface or an S1 interface. 
         [0079]    Upon receiving the pre-path command message, the BS  120  can perform a bearer establishment operation with respect to the BSs  130  and  140  included in the pre-path region  301 . The BS  120  can execute an X2 pre-path setup with respect to the BS  130  and the BS  140 . Further, the BS  120  can execute an S1 pre-path setup with respect to the BS  130  and the BS  140 . When the execution of the pre-path setup is complete, a bearer can be established among the BS  120 , the BS  130 , and the BS  140 . The BS  120  can execute data forwarding to the BS  130  or the BS  140  via the established bearer. The BS  120  can transmit a pre-path complete message to the moving terminal  150 . The pre-path complete message can include a target C-Radio Network Temporary Identifier (RNTI) list. When entering the handover region  311 , the moving terminal  150  can execute an RACH operation with respect to the BS  130 . 
         [0080]      FIG. 6  illustrates an operation of exchanging information between the moving terminal  150  and the region managing server  530  according to an embodiment of the present disclosure. 
         [0081]    Although it is illustrated in  FIG. 6  that information is directly delivered between the moving terminal  150  and the region managing server  530 , both of the moving terminal  150  and the region managing server  530  can transmit the information via a BS communicating with the moving terminal  150 . 
         [0082]    The moving terminal  150  can transmit vehicle movement information of the moving terminal  150  to the region managing server  530 . In one embodiment, the vehicle movement information can include a destination address and departure address of the moving terminal  150  or both of the departure address and the destination address. In another embodiment, the vehicle movement information can correspond to a vehicle number (e.g., a city bus number, a vehicle specific number). In another embodiment, if the moving terminal  150  is operatively coupled to a navigation, the vehicle movement information can correspond to a vehicle path indicated by the navigation. 
         [0083]    The region managing server  530  can determine the movement path of the moving terminal  150  on the basis of the received vehicle movement information, and can determine a list of BSs located on the movement path. The region managing server  530  can determine the pre-path region and the handover region on the basis of the vehicle movement information and the BS list. The region managing server  530  can transmit information indicating the determined pre-path region and handover region to the moving terminal  150 . 
         [0084]      FIG. 7  illustrates an operation of determining a pre-path region according to various embodiments of the present disclosure. 
         [0085]    Referring to  FIG. 7 , the wireless communication system  300  can include the pre-path region  301  and the pre-path region  302 . The pre-path region can include a list of BSs located on a movement path of the moving terminal  150  and determined by the network  110  on the basis of movement information of the moving terminal  150 . The pre-path region  301  can include the BS  120 , the BS  130 , and the BS  140 . The pre-path region  302  can include the BS  140 , the BS  340 , and the BS  350 . Although the limited size of the pre-path region and the limited number of BSs are shown in  FIG. 7  for convenience of explanation, the size of the pre-path region and the number of BSs are not limited. In one embodiment, the pre-path region  301  can further include the BS  340  and the BS  350  according to a wireless communication environment between BSs. In another embodiment, the pre-path region  301  can include only the BS  120  and the BS  130 . 
         [0086]      FIG. 8A  and  FIG. 8B  illustrate an operation of determining a handover region according to various embodiments of the present disclosure. 
         [0087]    Referring to  FIG. 8A , when the moving terminal  150  enters the handover region  311 , the moving terminal  150  can execute a handover operation with respect to the BS  130  without the execution of a Time To Trigger (TTT) operation. 
         [0088]    Referring to  FIG. 8B , the handover region is pre-set along a street. Whether the street corresponds to the handover region can be measured in a specific unit. For example, as illustrated in  FIG. 8B , a road  810  corresponds to a region in which the moving terminal  150  measures signal strength among different BSs to configure the handover region. A road  820  corresponds to a region in which the signal strength has not been measured yet. The street can form a grid with an interval of 2 m. The road  810  can include a grid A, a grid B, and a grid C. The moving terminal  150  can measure signal strength for each of the grids and can transmit the measurement result to the region managing server  530 . The region managing server  530  can determine the handover region on the basis of the measurement result on each grid. 
         [0089]      FIG. 9  illustrates a measurement procedure for determining a pre-path region and a handover region according to various embodiments of the present disclosure. 
         [0090]    Although only the BS  120  and the BS  130  are illustrated in  FIG. 9 , the wireless communication system  300  can include different BSs related to the movement information of the moving terminal  150 . 
         [0091]    Referring to  FIG. 9 , the BS  120  and the BS  130  can transmit information indicating an absolute location of a fixed BS to the region managing server  530 . Further, the BS  120  and the BS  130  can transmit a measurement request message to the moving terminal  150 . The measurement request message can include the measurement result for the strength of signals (i.e. RSRP, RSRQ) and measurement location for the BSs  120  and the BS  130  from the moving terminal  150 . 
         [0092]    The moving terminal  150  can measure the strength of signals and measurement location between the BS  120  and the BS  130 , and can transmit information including the measurement result to the region managing server  530 . The information including the measurement result can further include an ID of the BS  120  and the BS  130 . In addition, the information including the measurement result can further include a handover point. The handover point indicates a point at which the moving terminal  150  executes a handover with respect to the BS  120  and the BS  130 . 
         [0093]    The region managing server  530  can determine a pre-path region and a handover region related to a movement path of the moving terminal  150  on the basis of absolution location information received from the BS  120  and the BS  130  and the measurement result received from the moving terminal  150 . 
         [0094]      FIG. 10A  and  FIG. 10B  are flowcharts illustrating an operation of determining a handover region according to various embodiments of the present disclosure. 
         [0095]      FIG. 10A  is a flowchart illustrating a method of determining a handover region on the basis of strength of signals depending on a location of BSs.  FIG. 10B  is a flowchart illustrating a method of determining a handover region by deciding whether it is a point at which a previous handover occurs according to a location of BSs. 
         [0096]    Referring to  FIG. 10A , the region managing server  530  can confirm location information of BSs (step  1010 ). The location information can be expressed by an orthogonal coordinate system. For example, the BS  120  can confirm the location information by using an x-coordinate and a y-coordinate. The region managing server  530  can configure a handover region ID on the basis of the location information of the BSs (step  1020 ). The handover region ID represents an identifier indicating a region corresponding to the handover region. For example, the handover region ID can be indicated by using the x-coordinate and the y-coordinate. Further, for example, the handover region ID can be indicated by using a grid for forming a road. 
         [0097]    The region managing server  530  can confirm strength of signals depending on the location of the BSs (step  1030 ). The strength of signals can be measured by the moving terminal  150 , and the measurement result can be transmitted to the region managing server  530 . The region managing server can compare the received measurement value with a threshold value (step  1040 ) to determine whether it is a handover region. If the received measurement result is greater than or equal to the threshold value, it can be determined as the handover region (step  1090 ). If the received measurement result is less than the threshold value, it can be determined as not the handover region (step  1080 ). 
         [0098]    In one embodiment, referring to  FIG. 8B , the moving terminal  150  can measure the strength of signals with respect to the BS  120  in the grid A, the grid B, and the grid C, and can transmit the measurement result to the region managing server  530 . If the measurement result for the strength of signals is greater than the threshold value in the grid A, the region managing server  530  can determine the grid A as the handover region. If the measurement result for the strength of signals is equal to the threshold value in the grid B, the region managing server  530  can determine the grid B as the handover region. If the measurement result for the strength of signals is less than the threshold value in the grid C, the region managing server  530  can determine that the grid C is not the handover region. 
         [0099]    Referring to  FIG. 10B , the region managing server  530  can confirm location information of BSs (step  1010 ). The region managing server  530  can configure a handover region ID on the basis of the location information of the BSs (step  1020 ). The region managing server can determine whether a location of the BSs corresponds to a handover point (step  1050 ). The handover point can imply a point at which a test vehicle executes a handover while moving along a road. If a random location corresponds to the handover point, the region managing server  530  can determine the location as a handover zone (step  1090 ). If a different random location does not correspond to the handover point, the region managing server  530  can determine that the location is not the handover zone (step  1080 ). 
         [0100]    In one embodiment, referring to  FIG. 8B , the test vehicle can confirm whether the handover is executed while passing the grid A, the grid B, and the grid C. If the handover is executed in the grid A and the grid B, the region managing server  530  can determine that the grid A and the grid B are the handover zone, and can determine that the grid C is not the handover zone. 
         [0101]      FIG. 11A  to  FIG. 11D  illustrate information indicating a pre-path region and a handover region according to various embodiments of the present disclosure. 
         [0102]    Information indicating the pre-path region and the handover region can be expressed by a mapping table. However, it is expressed by the mapping table only for convenience of explanation, and thus a method of expressing the information is not limited thereto. 
         [0103]      FIG. 11A  illustrates a mapping table for expressing information regarding a pre-path region and transmitted from the network  110  to the moving terminal  150 . The mapping table can include items for a pre-path region ID, a central location, and a handover region. The pre-path region ID represents an identifier indicating a region corresponding to a pre-path region. The central location represents location information of a center of the pre-path region. For example, the central location can be indicated by using an x-coordinate and a y-coordinate. The handover region indicates a sub-region of the pre-path region having the pre-path region ID. 
         [0104]      FIG. 11B  illustrates a mapping table for expressing information regarding a pre-path region and transmitted from the network  110  to BSs included in a pre-path region. The mapping table can include a pre-path region ID and an ID of the BSs included in the pre-path region. For example, referring to  FIG. 3 , the pre-path region ID can correspond to the pre-path region  301 . The BS ID can correspond to the BSs  120 ,  130 , and  140  included in the pre-path region  301 . 
         [0105]      FIG. 11C  illustrates a mapping table for expressing information regarding a handover region and transmitted from the network  110  to the moving terminal  150 . The mapping table can include a handover region ID and a central location. The handover region ID represents an identifier indicating a region corresponding to the handover region. The central location represents central location coordinate information of a grid corresponding to the handover region. For example, referring to  FIG. 8B , the central location can be an x-coordinate and a y-coordinate for a central location of a grid A. 
         [0106]      FIG. 11D  illustrates a mapping table for expressing information regarding a handover region and transmitted from the network  110  to BSs included in a pre-path region. The mapping table can include a handover region ID and a BS ID. The BS ID can include an ID for a BS which executes a handover in a region corresponding to the handover region ID among the BSs included in the pre-path region. For example, referring to  FIG. 3 , the handover region ID can correspond to the handover region  311 , and the BS ID can correspond to the BS  130 . 
         [0107]      FIG. 12A  illustrates a procedure of delivering data by a BS in a pre-path region to other BSs according to an embodiment of the present disclosure. 
         [0108]    Although a procedure of handling a case where the moving terminal  150  enters the pre-path region  301  is illustrated in  FIG. 12A  for convenience of explanation, the procedure can be handled in the same manner also in a case where the moving terminal  150  enters another pre-path region. 
         [0109]    Referring to  FIG. 12A , a procedure of handling an operation in which BSs establish a bearer through an X2 interface is illustrated. When the moving terminal  150  enters the pre-path region  301 , the moving terminal  150  can transmit a pre-path command message to the BS  120 . The pre-path command message can include a pre-path region ID and a terminal ID. Upon receiving the pre-path command message, the BS  120  can transmit a pre-path request message to the BS  130  and the BS  140 . The pre-path request message can include a terminal ID and source bearer information (or info). The source bearer info can include information regarding the BS  120 . The BS  130  and the BS  140  can transmit a pre-path request ACK message to the BS  120  in response to the pre-path request message. The pre-path request ACK message can include target bearer info and handover info. The target bearer info can include information regarding the BS  130  and the BS  140 . If the BS  120  receives the pre-path request ACK message, an X2 bearer can be established among the BS  120 , the BS  130 , and the BS  140 . When the X2 bearer is established among the BSs, the BS  120  can transmit a pre-path complete message to the moving terminal  150 . The pre-path complete message can include the handover info. The BS  120  can perform data forwarding to the BS  130  and the BS  140  via the established X2 bearer. 
         [0110]      FIG. 12B  illustrates a procedure of delivering data by a BS in a pre-path region to other BSs according to another embodiment of the present disclosure. 
         [0111]    Referring to  FIG. 12B , a procedure of handling an operation in which BSs establishes a beater through an S1 interface together with the network  110  is illustrated. When the moving terminal  150  enters the pre-path region  301 , the moving terminal  150  can transmit a pre-path command message to the BS  120 . The pre-path command message can include a pre-path region ID and a terminal ID. Upon receiving the pre-path command message, the BS  120  can deliver the pre-path command message to the region managing server  530  included in the network  110 . The delivered pre-path command message can include a pre-path ID, a terminal ID, and source bearer info. Upon receiving the delivered free-path command message, the region managing server  530  can transmit the pre-path request message to the BS  130  and the BS  140 . The pre-path request message can include a terminal ID, source bearer info, and source cell info. The BS  130  and the BS  140  can transmit the pre-path request ACK message to the region managing server  530  in response to the pre-path request message. The pre-path request ACK message can include target bearer info and handover info. When the region managing server  530  receives the pre-path request ACK message, an S1 bearer can be established among the S-GW  520 , the BS  130 , and the BS  140 . When the S1 bearer is established, the region managing server  530  can transmit a pre-path complete message to the moving terminal  150 . The pre-path complete message can include the handover info. The region managing server  530  can transmit a data request message to the P-GW  540 . Upon receiving the data request message, the P-GW  540  can transmit data to the S-GW  520 . The S-GW  520  can perform data forwarding to the BS  130  and the BS  140  via the established S1 bearer. 
         [0112]      FIG. 13  illustrates a procedure of determining a time at which data is delivered by one BS in a pre-path region to other BSs according to an embodiment of the present disclosure. 
         [0113]    The moving terminal  150  can transmit a pre-path command message to the BS  120 . The pre-path command message can include a vehicle average speed and vehicle location information of the moving terminal  150 . Upon receiving the pre-path command message, the BS  120  can deliver the vehicle average speed and vehicle location information of the moving terminal  150  to the BS  130  and the BS  140 . The BS  130  and the BS  140  can calculate an arrival estimation time of the moving terminal  150  on the basis of information of the moving terminal  150 . The BS  130  and the BS  140  can determine a time at which data is requested to the BS  120  in association with the calculated arrival estimation time. When an event occurs, the moving terminal  150  can transmit information including a type of the event, a speed of the moving terminal  150 , and a vehicle location to the BS  120 . In one embodiment, the event can be a vehicle accident. Upon receiving information including the type of the event, the speed of the moving terminal  150 , and the vehicle location, the BS  120  can deliver the information to the BS  130  and the BS  140 . 
         [0114]    As illustrated in  FIG. 13 , according to the aforementioned handling procedure, the BS  130  and the BS  140  can recognize in advance a time at which data is transmitted. The wireless communication system  300  can significantly decrease a network load since an unnecessary data transmission time is decreased. 
         [0115]      FIG. 14A  illustrates a handling procedure when entering a handover region according to an embodiment of the present disclosure. 
         [0116]    Referring to  FIG. 14A , a handover handling procedure is illustrated when data forwarding is complete among BSs. When entering the handover region  311 , the moving terminal  150  can perform an RACH operation with respect to the BS  130 . The RACH operation can include a process in which the moving terminal  150  transmits a random access preamble to the BS  130  and a process in which the BS  130  transmits a Random Access Response (RAR) message to the moving terminal  150 . The RAR message can include a last Packet Data Convergence Protocol (PDCP) SN. The last PDCP SN implies a remaining part of vehicle service data received from the network  110  via the BS  120  before the moving terminal  150  executes a handover. When the execution of the handover is complete, the BS  130  can transmit a pre-path release message to the BS  140  via the region managing server  530  and the P-GW  540 . 
         [0117]      FIG. 14B  illustrates a handling procedure when entering a handover region according to another embodiment of the present disclosure. 
         [0118]    Referring to  FIG. 14B , a handover handling procedure is illustrated when data forwarding is not complete among BSs. When entering a handover region, the moving terminal  150  can transmit a data forwarding request message to the BS  120 . The data forwarding request message can include a last PDCP SN. The BS  120  can perform data forwarding to the BS  130  and the BS  140  in response to the data forwarding request message. When the data forwarding is complete, the BS  130  or the BS  140  can perform the RACH operation with respect to the moving terminal  150 . When the execution of the handover is complete, the BS  130  can transmit a pre-path release message to the BS  140  via the region managing server  530  and the P-GW  540 . 
         [0119]      FIG. 15  is a flowchart illustrating a change in a handover operation mode depending on whether a user terminal is placed in a vehicle according to various embodiments of the present disclosure. 
         [0120]    It can be assumed in the embodiment of  FIG. 15  that the moving terminal  150  is a vehicle device. It can be also assumed in the embodiment of  FIG. 15  that the user terminal is a terminal of a user who rides in the vehicle device. The user terminal can include two or more terminals. It can be determined whether the user terminal is placed in the vehicle device (step  1510 ). If the user terminal is placed in the vehicle device, the user terminal is set to a vehicle handover mode (step  1520 ). In the vehicle handover mode, the user terminal can execute a handover in the same manner as the vehicle device. If the user terminal is not placed in the vehicle device, the user terminal is set to a legacy handover mode (step  1530 ). 
         [0121]      FIG. 16  illustrates an operation of determining whether a user terminal is placed in a vehicle according to an embodiment of the present disclosure. 
         [0122]    It can be assumed in the embodiment of  FIG. 16  that the moving terminal  150  is a vehicle device. It can also be assumed in the embodiment of  FIG. 16  that a user terminal  1610  is a terminal of a user who rides in the vehicle device. 
         [0123]    Referring to  FIG. 16 , in step  1650 , the user terminal  1610  can measure an acceleration or speed of the user terminal  1610  and the moving terminal  150 . The user terminal  1610  can directly measure the acceleration or speed of the user terminal  1610  and the moving terminal  150 , and can measure it by using BSs communicating with the user terminal  1610  and the moving terminal  150 . If the acceleration or speed of the user terminal  1610  is not equal to the acceleration or speed of the moving terminal  150  for a specific time duration, the user terminal  1610  can determine that the user terminal  1610  is not placed in the moving terminal  150  (step  1680 ). If the acceleration or speed of the user terminal  1610  is equal to the acceleration or speed of the moving terminal  150 , the user terminal  1610  can determine that the user terminal  1610  is placed in the moving terminal  150  (step  1660 ). If the acceleration of the user terminal  1610  and the moving terminal  150  is 0 (i.e., a constant speed) in step  1660 , the user terminal  1610  can determine whether it is placed in a vehicle according to whether the user terminal  1610  and the moving terminal  150  have the same speed. If the moving terminal  150  stops in step  1660 , the speed of the user terminal  1610  and the moving terminal  150  is 0. If the moving terminal  150  starts to move again, the user terminal  1610  can confirm whether the user terminal  1610  and the moving terminal  150  have the same acceleration for a specific time duration. 
         [0124]      FIG. 17A  illustrates a handover handling procedure when a user terminal is placed in a vehicle according to an embodiment of the present disclosure. 
         [0125]    It can be assumed in the embodiment of  FIG. 17A  that the moving terminal  150  is a vehicle device. It can also be assumed in the embodiment of  FIG. 17A  that the user terminal  1610  is a terminal of a user who rides in the moving terminal  150 . 
         [0126]    Referring to  FIG. 17A , it can be determined whether the user terminal  1610  is placed in the moving terminal  150 . If the user terminal  1610  is placed in the moving terminal  150 , the user terminal  1610  can acquire a vehicle ID of the moving terminal  150 . The user terminal  1610  can be set to a vehicle handover mode. The user terminal  1610  can execute a handover on the basis of a region to which it enters when the vehicle handover mode is set. When entering a pre-path region, the moving terminal  150  can deliver pre-path region information to the user terminal  1610 . The pre-path region information can include a pre-path region ID and a vehicle ID. Upon receiving the pre-path region information, the user terminal  1610  can perform an operation of establishing a bearer among BSs in the same manner as the moving terminal  150 . When entering a handover region, the moving terminal  150  can deliver handover region information to the user terminal  1610 . The handover region information can include a handover region ID and a vehicle ID. Upon receiving the handover region information, the user terminal  1610  can execute a handover with respect to the BS in the same manner as the moving terminal  150 . If it is determined that the user terminal  1610  is removed from the moving terminal  150 , the user terminal  1610  is set to a legacy handover mode. The user terminal  1610  will perform the legacy handover operation. 
         [0127]      FIG. 17B  illustrates a handover handling procedure when a user terminal is placed in a vehicle according to another embodiment of the present disclosure. 
         [0128]    Referring to  FIG. 17B , two or more user terminals can be added in addition to the user terminal  1610 . The user terminals can be set to a handover mode according to whether being placed in the moving terminal  150 . For example, if the user terminal  1610  is placed in the moving terminal  150  and a user terminal  1620  is not placed in the moving terminal  150 , the user terminal  1610  can be set to a vehicle handover mode, and a user terminal  1620  can be set to a legacy handover mode. For another example, if both of the user terminal  1610  and the user terminal  1620  are placed to the moving terminal  150 , both of the user terminal  1610  and the user terminal  1620  can be set to the vehicle handover mode. 
         [0129]      FIG. 18  is a block diagram of a terminal according to various embodiments of the present disclosure. 
         [0130]    Hereinafter, the term ‘ . . . unit’, ‘ . . . device’, or the like implies a unit of processing at least one function or operation, and can be implemented in hardware or software or in combination of the hardware and the software. 
         [0131]    Referring to  FIG. 18 , the moving terminal  150  can include an antenna  1810 , a transceiver  1820 , a controller  1830 , and a storage unit  1840 . 
         [0132]    The transceiver  1820  performs functions for transmitting/receiving a signal through the antenna  1810 . For example, the transceiver  1820  performs a function of conversion between a baseband signal and a bit-stream according to a physical layer standard of a system. For example, in data transmission, the transceiver  1820  generates complex symbols by coding and modulating a transmission bit-stream. Further, in data reception, the transceiver  1820  restores a reception bit-stream by demodulating and decoding a baseband signal. Furthermore, the transceiver  1820  up-converts a baseband signal into a Radio Frequency (RF) signal and thereafter transmits it through an antenna, and down-converts an RF signal received via the antenna into a baseband signal. For example, the transceiver  1820  can include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a Digital to Analog Convertor (DAC), an Analog to Digital Convertor (ADC), and the like. 
         [0133]    The controller  1830  can control overall operations of the moving terminal  150 . For example, the controller  1830  can transmit/receive information via the transceiver  1820 . Further, the controller  1830  can record data into the storage unit  1840  and can fetch the data. Furthermore, the controller  1830  can measure the strength of signals of BSs. The controller  1830  can include at least one processor or micro processor, or can be a part of the processor. 
         [0134]    The storage unit  1840  can store data such as a basic program, application program, configuration information, or the like for the operation of the moving terminal  150 . For example, the storage unit  1840  can store a vehicle service received from the network  110  via the BS  120 . Further, the storage unit  1840  can store pre-path region and handover region information received from the network  110  via the BS  120 . The storage unit  1840  can consist of a volatile memory, a non-volatile memory, or a combination of the volatile memory and the non-volatile memory. 
         [0135]      FIG. 19  is a block diagram of a source BS according to various embodiments of the present disclosure. 
         [0136]    In the present disclosure, the BS  120  of  FIG. 1  can correspond to the source BS. Referring to  FIG. 19 , the BS  120  can include an antenna  1910 , a transceiver  1920 , a controller  1930  a storage unit  1940 , and a backhaul network interface  1950 . 
         [0137]    The transceiver  1920  performs functions for transmitting/receiving a signal through the antenna  1910  from the moving terminal  150  or different BSs. For example, the transceiver  1920  performs a function of conversion between a baseband signal and a bit-stream according to a physical layer standard of a system. For example, in data transmission, the transceiver  1920  generates complex symbols by coding and modulating a transmission bit-stream. Further, in data reception, the transceiver  1920  restores a reception bit-stream by demodulating and decoding a baseband signal. Furthermore, the transceiver  1920  up-converts a baseband signal into a Radio Frequency (RF) signal and thereafter transmits it through an antenna, and down-converts an RF signal received via the antenna into a baseband signal. For example, the transceiver  1920  can include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a Digital to Analog Convertor (DAC), an Analog to Digital Convertor (ADC), and the like. 
         [0138]    The controller  1930  can control overall operations of the BS  120 . For example, the controller  1930  can transmit/receive information via the transceiver  1920 . Further, the controller  1930  can record data into the storage unit  1940  and can fetch the data. Furthermore, the controller  1930  can perform an operation of handling a bearer establishment. The controller  1930  can include at least one processor or micro processor, or can be a part of the processor. 
         [0139]    The storage unit  1940  can store data such as a basic program, application program, configuration information, or the like for the operation of the BS  120 . For example, the storage unit  1940  can store information indicating a pre-path region and a handover region and received from the network  110 . The storage unit  1940  can consist of a volatile memory, a non-volatile memory, or a combination of the volatile memory and the non-volatile memory. 
         [0140]    The backhaul network interface  1940  can perform communication between the BS  120  and the network  110 . For example, the BS  120  can receive information indicating a pre-path region and a handover region from the network  110  via the backhaul network interface  1940 . 
         [0141]      FIG. 20  is a block diagram of a target BS according to various embodiments of the present disclosure. 
         [0142]    In the present disclosure, the BS  130  or BS  140  of  FIG. 1  can correspond to the target BS. Referring to  FIG. 20 , the BS  130  can include an antenna  2010 , a transceiver  2020 , a controller  2030 , a storage unit  2040 , and a backhaul network interface  2050 . 
         [0143]    The transceiver  2020  performs functions for transmitting/receiving a signal through the antenna  2010  from the moving terminal  150  or different BSs. For example, the transceiver  2020  performs a function of conversion between a baseband signal and a bit-stream according to a physical layer standard of a system. For example, in data transmission, the transceiver  2020  generates complex symbols by coding and modulating a transmission bit-stream. Further, in data reception, the transceiver  2020  restores a reception bit-stream by demodulating and decoding a baseband signal. Furthermore, the transceiver  2020  up-converts a baseband signal into a Radio Frequency (RF) signal and thereafter transmits it through an antenna, and down-converts an RF signal received via the antenna into a baseband signal. For example, the transceiver  2020  can include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a Digital to Analog Convertor (DAC), an Analog to Digital Convertor (ADC), and the like. 
         [0144]    The controller  2030  can control overall operations of the BS  130 . For example, the controller  2030  can transmit/receive information via the transceiver  2020 . Further, the controller  2030  can record data into the storage unit  2040  and can fetch the data. Furthermore, the controller  2030  can perform an operation of handling a bearer establishment. The controller  2030  can include at least one processor or micro processor, or can be a part of the processor. 
         [0145]    The storage unit  2040  can store data such as a basic program, application program, configuration information, or the like for the operation of the BS  130 . For example, the storage unit  2040  can store information indicating a pre-path region and a handover region and received from the network  110 . The storage unit  2040  can consist of a volatile memory, a non-volatile memory, or a combination of the volatile memory and the non-volatile memory. 
         [0146]    The backhaul network interface  2040  can perform communication between the BS  130  and the network  110 . For example, the BS  130  can receive information indicating a pre-path region and a handover region from the network  110  via the backhaul network interface  2040 . 
         [0147]      FIG. 21  is a block diagram of a server according to various embodiments of the present disclosure. 
         [0148]    Referring to  FIG. 21 , the region managing server  530  can include a network interface  2110 , a controller  2120 , and a storage unit  2130 . The controller  2120  can include a pre-path region determining unit  2121  and a handover region determining unit  2122 . 
         [0149]    The network interface  2110  can perform communication between the region managing server  530  and different BSs. For example, the region managing server  530  can receive location information of the different BSs via the network interface  2110 . Further, the region managing server  530  can transmit information indicating the pre-path region and the handover region via the network interface  2110 . 
         [0150]    The storage unit  2130  can store data such as a basic program, application program, configuration information, or the like for the operation of the region managing server  530 . For example, the storage unit  2130  can store BS location information, measurement result for the strength of signals, and handover point received from the moving terminal  150  via the BS  120 . 
         [0151]    The controller  2120  can control overall operations of the region managing server  530 . For example, the controller  2120  can transmit/receive information via the network interface  2110 . Further, the controller  2120  can record data into the storage unit  2130  and can fetch the data. The pre-path region determining unit  2121  can determine the pre-path region on the basis of mobile information of the moving terminal  150 . The handover region determining unit  2122  can determine the handover region on the basis of the mobile information of the moving terminal  150 . 
         [0152]    As described above, embodiments of the present disclosure provide a method of supporting a handover for a high reliability and low latency service in a wireless communication system such as a vehicle communication system. 
         [0153]    Although the present disclosure has been described with an exemplary embodiment, various changes and modifications be suggested to one skilled in the art. It is intended that the present disclosure encompass such changes and modifications as fall within the scope of the appended claims.