Abstract:
An apparatus for changing wireless network service receives a signal from a mobile apparatus, and transmits the signal to an apparatus for allocating wireless network service. The apparatus for allocating wireless network service allocates the base stations to the mobile apparatus according to the signal. Therefore, the base stations can efficiently serve the mobile apparatus with available resources of communication.

Description:
[0001]    This application claims priority to Taiwan Patent Application No. 095144394 filed on Nov. 30, 2006 of which the contents are incorporated herein by reference in its entirety. CROSS-REFERENCES TO RELATED APPLICATIONS 
         [0002]    Not applicable. 
       BACKGROUND OF THE INVENTION 
       [0003]    1. Field of the Invention 
         [0004]    The present invention relates to a wireless network handover apparatus, a method, and a computer readable medium. More specifically, it relates to a wireless network handover apparatus, a method, and a computer readable medium for dynamically controlling and processing handover. 
         [0005]    2. Descriptions of the Related Art 
         [0006]    With popular and various applications of every kind of electric wireless apparatuses, it is obvious that a wireless apparatus often provides different kinds of services simultaneously. Here a mobile phone is used as an example. Currently, most mobile phones provide the functionality of internet access. Consequently, while a user is calling for talk, the user is possibly downloading data using a FTP (File Transfer Protocol) or sending a short message by using the mobile phone simultaneously. Therefore, the same mobile phone provides three kinds of service at the same time. When the mobile phone leaves the signal coverage range of a base station and enters another signal coverage range of another base station, a handover operation is required to prevent various kinds of data transmission of the mobile phone from interrupted. 
         [0007]      FIG. 1  shows a schematic diagram of the conventional handover architecture for a mobile phone  1 . The conventional handover architecture comprises a base station  10 , a base station  11 , a base station  12  and a mobile phone  13 . In the conventional example, the base station  10  and the base station  11  can provide three kinds of services such as an speech communication Cl, a data communication C 2  and a short message service C 3 , while the base station  12  can only provide the speech communication Cl and the short message service C 3 . 
         [0008]    At first, the mobile phone  13  is within the signal coverage range of services provided by the base station  10 . Therefore, the base station  10  provides a connection  14  for the mobile phone  13 . By utilizing the connection  14 , the mobile phone  13  uses three kinds of services. When the mobile phone  13  moves to the signal coverage ranges of the base station  11  and the base station  12  along a moving path  15 , a connection  16  between the base station  11  and the mobile phone  13  is built if the base station  11  can provide a better servo quality. Then the mobile phone  13  can use the services provided by the base station  11  via the connection  16 . 
         [0009]    If the mobile phone  13  continuously moves along the moving path  15 , the mobile phone  13  will leave the service signal coverage range of the base station  10  gradually and the communication signal quality between the mobile phone  13  and the base station  10  is getting worse. When the mobile phone  13  is located at a position that only the base station  12  can provide services, and the base station  12  has not enough resources to provide three kinds of services simultaneously, the original speech communication Cl, data communication C 2  and short message service C 3  built between the mobile phone  13  and the base station  13  will be interrupted simultaneously until entering the signal coverage range of the base station  11 . Only if the resources of the base station  11  was enough for simultaneously providing the speech communication C 1 , the data communication C 2  and the short message service C 3 , the mobile phone  13  can reuse three services provided by the base station  11  via the connection  16 . From the aforementioned example, all base stations must provide the required resources of services C 1 , C 2  and C 3  simultaneously to perform handover in the conventional handover architecture for a mobile phone  1 . This leads to inconvenient that the speech communication is forced to be interrupted possibly due to bad overlapping of the signal coverage ranges among base stations while the user is using the speech communication service. Consequently, how to switch services dynamically to different base station according to connection intensity, such as the speech communication C 1  being provided by the base station  12 , the data communication C 2  and the short message service C 1  being provided by the base station  10 , to effectively utilize resources of each base station and to prevent user required services from interrupted as possible to further enhance utilization ratios of all base stations is still an objective for the industry to endeavor. 
       SUMMARY OF THE INVENTION 
       [0010]    One objective of this invention is to provide a handover control method of a wireless network, comprising steps of: receiving a report signal from a first service group; determining whether the first service group needs update according to the report signal; transmitting a reservation signal to a second service group for reserving the reservation resources of the second service group; and transmitting an allocation signal to the first service group and the second service group for indicating the handover; wherein each of the first service group and the second service group comprises a plurality of base stations for providing the services to a wireless apparatus. 
         [0011]    Another objective of this invention is to provide a handover control apparatus of a wireless network. The handover control apparatus comprises a receiving module and a transmitting module. The receiving module is used for receiving a report signal from a first service group and determining whether the first service group needs update according to the report signal. The transmitting module is used for transmitting a reservation signal to a second service group to reserve the service resources of the second service group and transmitting an allocation signal to the first service group and the second service group to indicate the handover. Wherein, each of the first service group and the second service group comprises a plurality of base stations for providing the services to a wireless apparatus. 
         [0012]    Yet a further objective of the invention is to provide a computer readable medium for storing a computer program. The computer program makes a handover control apparatus of a wireless network execute a handover control method of a wireless network. The method comprises steps of: receiving a report signal by a receiving module, wherein the report signal is from a first service group; determining whether the first service group needs update according to the report signal by the receiving module; transmitting a reservation signal to a second service group for reserving the reservation resources of the second service group by a transmitting module; and transmitting an allocation signal to the first service group and the second service group for indicating the handover by the transmitting module; wherein each of the first service group and the second service group comprises a plurality of base stations for providing the services to a wireless apparatus. 
         [0013]    Yet a further objective is to provide a handover method of changing a wireless network service, comprising steps of: receiving a reservation signal; transmitting a notice signal to a wireless apparatus according to the reservation signal; receiving an allocation signal; and determining whether the wireless network services of the wireless apparatus needs to be changed according to the allocation signal. 
         [0014]    Yet a further objective is to provide a handover apparatus of changing a wireless network service, comprising a receiving module, a transmitting module and a determining module. The receiving module is used for receiving a reservation signal and an allocation signal. The transmitting module is used for transmitting a notice signal to a wireless apparatus according to the reservation signal. The determining module is used for determining whether the wireless network services of the wireless apparatus needs to be changed according to the allocation signal. 
         [0015]    Yet a further objective is to provide a computer readable medium for storing a computer program. The computer program makes a handover apparatus of a wireless network execute a handover method of a wireless network. The method comprises steps of: receiving a reservation signal by a receiving module; transmitting a notice signal to a wireless apparatus according to the reservation signal by a transmitting module; receiving an allocation signal by the receiving module; and determining whether the wireless network services of the wireless apparatus needs to be changed according to the allocation signal by the determining module. 
         [0016]    The invention can effectively solve the problem of the conventional technique which is unable to execute the handover operation dynamically and leads to a drawback that while the user is using the wireless apparatus, the user must wait until the base station confirms all service resources are ready to perform the handover operation. The invention can individually perform the handover for each of the services that are already built by the wireless apparatus to each of the base stations according to the connection intensity of each of the base stations. Not only resources of each of the base stations can be utilized effectively, but also services already built by the wireless apparatus can maintain connection as possible to enhance an overall performance of the base stations. 
         [0017]    The detailed technology and preferred embodiments implemented for the subject invention are described in the following paragraphs accompanying the appended drawings for people skilled in this field to well appreciate the features of the claimed invention. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0018]      FIG. 1  is a schematic diagram of conventional handover architecture of a mobile phone; 
           [0019]      FIG. 2  is a schematic diagram of a first embodiment of the invention; 
           [0020]      FIG. 3  is a schematic diagram of a base station of a first embodiment of the invention; 
           [0021]      FIG. 4  is a schematic diagram of a base control station of a first embodiment of the invention; 
           [0022]      FIG. 5  is a schematic diagram of a second embodiment of the invention; 
           [0023]      FIG. 6  is a schematic diagram of a third embodiment of the invention; 
           [0024]      FIG. 7  is a schematic diagram of a fourth embodiment of the invention; 
           [0025]      FIG. 8A  is a flow chart of a fifth embodiment of the invention; 
           [0026]      FIG. 8B  is a flow chart of a fifth embodiment of the invention; 
           [0027]      FIG. 8C  is a flow chart of a fifth embodiment of the invention; 
           [0028]      FIG. 8D  is a flow chart of a fifth embodiment of the invention; 
           [0029]      FIG. 9A  is a flow chart of a sixth embodiment of the invention; 
           [0030]      FIG. 9B  is a flow chart of a sixth embodiment of the invention; 
           [0031]      FIG. 9C  is a flow chart of a sixth embodiment of the invention; 
           [0032]      FIG. 10A  is a flow chart of a seventh embodiment of the invention; 
           [0033]      FIG. 10B  is a flow chart of a seventh embodiment of the invention; 
           [0034]      FIG. 10C  is a flow chart of a seventh embodiment of the invention; 
           [0035]      FIG. 11A  is a flow chart of an eighth embodiment of the invention; 
           [0036]      FIG. 11B  is a flow chart of an eighth embodiment of the invention; 
           [0037]      FIG. 11C  is a flow chart of an eighth embodiment of the invention; 
           [0038]      FIG. 12A  is a flow chart of a ninth embodiment of the invention; 
           [0039]      FIG. 12B  is a flow chart of a ninth embodiment of the invention; 
           [0040]      FIG. 12C  is a flow chart of a ninth embodiment of the invention; 
           [0041]      FIG. 12D  is a flow chart of a ninth embodiment of the invention; 
           [0042]      FIG. 13A  is a flow chart of a tenth embodiment of the invention; 
           [0043]      FIG. 13B  is a flow chart of a tenth embodiment of the invention; 
           [0044]      FIG. 13C  is a flow chart of a tenth embodiment of the invention; 
           [0045]      FIG. 14A  is a flow chart of an eleventh embodiment of the invention; 
           [0046]      FIG. 14B  is a flow chart of an eleventh embodiment of the invention; 
           [0047]      FIG. 14C  is a flow chart of an eleventh embodiment of the invention; 
           [0048]      FIG. 15A  is a flow chart of a twelfth embodiment of the invention; 
           [0049]      FIG. 15B  is a flow chart of a twelfth embodiment of the invention; and 
           [0050]      FIG. 15C  is a flow chart of a twelfth embodiment of the invention. 
       
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0051]    A first embodiment of the invention is shown in  FIG. 2  which is a schematic diagram of a handover system  2  of a WiMAX wireless network. The system comprises a wireless apparatus  200 , a base station  201 , a base station  202 , a base station  203  and a base control station  204 . As shown in  FIG. 3 , each of the base stations  201 ,  202  and  203  comprises a receiving module  300 , a transmitting module  301 , and a determining module  302 . As shown in  FIG. 4 , the base control station  204  comprises a receiving module  400  and a transmitting module  401 . 
         [0052]    Rerferring to  FIG. 2 , in this embodiment, the base station  201  is a main base station providing an upload signal  205  and a download signal  206  for the wireless apparatus  200 . The upload signal  205  comprises all required information for uploading and the download signal  206  comprises all required information for downloading. The wireless apparatus  200  must obtain the information to achieve communications with the base station  201 , the base station  202  and the base station  203 . Detailed contents of the upload signal  205  and the download signal  206  are conforming to a WiMAX wireless network specification and no further descriptions are given here. 
         [0053]    In the first embodiment, three services simultaneously provided by one base station are distributed to three different base stations via the handover operation. Under an initial state, the base station  201  provides three connection services  207 ,  208  and  209  for the wireless apparatus  200 . At this time, a first service group that provides services for the wireless apparatus  200  comprises only the base station  201 . Next, the wireless apparatus  200  transmits measurement signals  210 ,  211  and  212  to detect connection intensity of the base station  201 ,  202  and  203  respectively, wherein a technique for detecting the connection intensity is conforming to the WiMAX wireless network specification and no further descriptions are given here. After obtaining the connection intensity information for each of the base stations, the wireless apparatus  200  can change communication to the base station that provides services according to the connection intensity information of each of the base stations. Consequently, the wireless apparatus  200  transmits a handover request signal  213  to the base station  201 , wherein the handover request signal  213  comprises the information of connection intensity of the wireless network, a service bandwidth, and a data linking priority of the wireless apparatus. The base station  201  receives the handover request signal  213  via the receiving module  300  and the transmitting module  301  transmits a first report signal  214  to the base control station  204  according to the content of the handover request signal  213 . 
         [0054]    Referring to  FIG. 4 , the base control station  204  receives the first report signal  214  via the receiving module  400  and determines whether a request of the report signal  214  can be met according to the information of the connection intensity of the wireless network, the service bandwidth, and the data linking priority of the wireless apparatus in the first report signal  214 . For convenient understanding, the connection intensity and a remaining resource are denoted as numbers in the following, and the wireless apparatus is located at a position that all the base stations  201 ,  202  and  203  can provide services. Assume that connection intensity of the wireless network of the base station  201  is  5  and its remaining resource is  2 , connection intensity of the wireless network of the base station  202  is  10  and its remaining resource is  5 , and connection intensity of the wireless network of the base station  203  is  15  and its remaining resource is  3 ; and the required resources and priorities of the connection services  207 ,  208  and  209  of the wireless apparatus are ( 6 , 3 ), ( 4 , 1 ) and ( 2 , 2 ) respectively. The priority with a smaller value means higher priority and the connection intensity of the wireless network with a larger value means stronger connection intensity. 
         [0055]    At first, considering ordering of the priorities. The service  207 , the service  208  and the service  209  are respectively distributed to the base station  201 , the base station  203  and the base station  202  that provide services. Next, considering whether the remaining resources are enough for providing corresponding services for each of the base stations. Consequently, the receiving module  400  of the base control station finally distributes the service  207 , the service  208  and the service  209  to the base station  201 , the base station  202  and the base station  203  respectively, and generates a reservation signal  215 . The transmitting module  401  transmits the reservation signal  215  to all base stations that provide services so that all base stations that provide services reserve necessary resources for providing services. In the first embodiment, all base stations that provide services are the base station  201 , the base station  202  and the base station  203 . After the base station  201  receives the reservation signal  215  via the receiving module  300 , the transmitting module  301  transmits a notice signal  216  to the wireless apparatus  200  according to the reservation signal  215  so that the wireless apparatus  200  receives a distributing result of the base control station  204 . 
         [0056]    Please refer to  FIG. 2  continuously. After the wireless apparatus  200  receives the notice signal  216 , it determines whether to accept the distributing result of the base control station  204 . If no, the handover request signal  213  is transmitted continuously. If yes, the distributing result of the base control station  204  is accepted and a decision signal  217  is transmitted to the base station  201  and the base station  201  transmits the decision signal  217  to the base control station  204 . After the base control station  204  receives the decision signal  217  via the receiving module  400 , the receiving module  400  determines whether the wireless apparatus  200  accepts the distributing result according to the decision signal  217 . If no, the reserved resources on each base station are not allocated. If yes, the transmitting module  401  transmits an allocation signal  218  to all base stations that provide services. After all base stations receive corresponding allocation signal  218  via corresponding receiving module, all base stations that provide services allocate the reserved resources. For the base station  201  as an example, the determining module  302  determines whether the base station  201  is the main base station according to the allocation signal  218 . If no, the upload signal  219  and the download signal  220  are stopped transmitting to the wireless apparatus  200 . If yes, the base station  201  retransmits the upload signal  219  and the download signal  220  to the wireless apparatus  200  so that the wireless apparatus  200  can receive uploading and downloading conditions of each of the base stations. Finally, services  207 ,  208  and  209  are separately provided by base stations  201 ,  202  and  203  to complete the handover operation. After completing the handover operation, base stations  201 ,  202  and  203  that provide services for the wireless apparatus  200  are called a second service group. 
         [0057]    In the first embodiment, if the handover request signal  213  comprises the information of connection intensity only, the base control station  204  can actively inform the wireless apparatus  200  via the reservation signal  215  to perform the handover operation for adjusting base stations that provide services  207 ,  208  and  209 . 
         [0058]    A second embodiment of the invention is shown in  FIG. 5  which is a wireless network handover system S conforming to the WiMAX specification. The system comprises a wireless apparatus  200 , a base station  201 , a base station  202 , a base station  203  and a base control station  204 . In the second embodiment, a main base station is changed from the base station  201  to the base station  203  via the handover operation, and an initial state is that services  207 ,  208  and  209  are provided by base stations  201 ,  202  and  203  respectively. The main base station is the base station  201 . 
         [0059]    At first, the wireless apparatus  200  transmits a handover request signal  500  to the base station  201 . After the base station  201  receives the handover request signal  500 , a first report signal  501  is transmitted to the base control station  204 . The base control station  204  determines whether to accept a request of the first report signal  501  according to the information of connection intensity of the wireless network, a service bandwidth and a data linking priority of the wireless apparatus in the first report signal  501 . If the request of the first report signal  501  is accepted, a reservation signal  502  is transmitted to the base station  201 . According to the reservation signal  502 , the base station  201  transmits a notice signal  503  to the wireless apparatus  200  so that the wireless apparatus  200  gets a distributing result of the base control station  204 . 
         [0060]    After the wireless apparatus  200  receives the notice signal  503 , it determines whether to accept the distribution result of the base control station  204 . If no, the wireless apparatus  200  continuously transmits the handover request signal  500 . If yes, the distributing result of the base control station  204  is accepted and a decision signal  504  is transmitted to the base station  201 . The base station  201  then transmits the decision signal  504  to the base control station  204 . The base control station  204  determines whether the wireless apparatus  200  accepts the distributing result of the base control station  204  according to the decision signal  504 . If no, the main base station is still the base station  201 . If yes, the base control station  204  transmits an allocation signal  505  to all the base stations so that all the base stations confirm that the main base station is changed from the base station  201  to the base station  203 . 
         [0061]    Next, the base station  203  transmits an upload signal  506  and a download signal  507  to the wireless apparatus  200  so that the wireless apparatus  200  recognizes uploading and downloading conditions for each of the base stations. Finally, services  207 ,  208  and  209  are provided by base stations  201 ,  202  and  203  respectively. 
         [0062]    In the second embodiment, if the handover request signal  500  comprises the information of connection intensity only, the base control station  204  can actively inform the wireless apparatus  200  via the reservation signal  502  to perform the handover operation for adjusting the main base station that provides the upload signal  506  and the download signal  507 . 
         [0063]    A third embodiment of the invention is shown in  FIG. 6  which is a wireless network handover system  6  conforming to the WiMAX specification. The system comprises a wireless apparatus  200 , a base station  201 , a base station  202 , a base station  203  and a base control station  204 . In the third embodiment, the base station  201  is changed to the base station  203  via the handover operation to provide the service  207  as an example, and an initial state is that services  207 ,  208  and  209  are provide by base stations  201 ,  202  and  203  respectively. A main base station is the base station  203 . 
         [0064]    When the wireless apparatus  200  transmits a handover request signal  600  to the base station  203  and after the base station  203  receives the handover request signal  600 , the base station  203  transmits a first report signal  601  to the base control station  204 . The base control station  204  determines whether to accept a request of the first report signal  601  according to the information of connection intensity of the wireless network, a service bandwidth and a data linking priority of the wireless apparatus in the first report signal  601 . If the request of the first report signal  601  is accepted, the base station  204  transmits a reservation signal  602  to the base station  203 . 
         [0065]    According to the reservation signal  602 , the base station  203  transmits a notice signal  603  to the wireless apparatus  200  so that the wireless apparatus  200  receives a distributing result of the base control station  204 . 
         [0066]    After the wireless apparatus  200  receives the notice signal  603 , it determines whether to accept the distribution result of the base control station  204 . If no, the handover request signal  600  is transmitted continuously. If yes, the distributing result of the base control station  204  is accepted and the wireless apparatus  200  transmits a decision signal  604  to the base station  203 . The base station  203  then transmits the decision signal  604  to the base control station  204 . The base control station  204  determines whether the wireless apparatus  200  accepts the distributing result of the base control station  204  according to the decision signal  604 . If no, all base stations that provide services are remained the same. If yes, the base control station  204  transmits an allocation signal  605  to all the base stations to inform all base stations that the service  207  will be changed from the base station  201  to the base station  203  for providing. Later, the base station  203  transmits an upload signal  606  and a download signal  607  to the wireless apparatus  200  so that the wireless apparatus  200  recognizes current uploading and downloading conditions of each of the base stations. Finally, the base station  203  provides services  207  and  209  and the base station  202  provides the service  208  for the wireless apparatus  200 . 
         [0067]    In the third embodiment, if the handover request signal  600  comprises the information of connection intensity only, the base control station  204  can actively inform the wireless apparatus  200  via the reservation signal  602  to perform the handover operation for adjusting the base station that provides services  207 ,  208  and  209 . 
         [0068]    A fourth embodiment of the invention is shown in  FIG. 7  which is a wireless network handover system  7  conforming to the WiMAX specification. The system comprises a wireless apparatus  200 , a base station  700 , a base station  202 , a base station  203  and a base control station  204 , wherein the base station  700  is the same as the base station  202  and the base station  203 . 
         [0069]    In the fourth embodiment, the base station  203  is changed to the newly added base station  700  via the handover operation to provide the service  209 , and an initial state is that services  207  and  209  are provide by the base station  203 , and the service  208  is provided by the base station  202 . A main base station is the base station  203 . 
         [0070]    At first, the wireless apparatus  200  detects the signal of the base station  700  and thus the wireless apparatus  200  transmits measurement signals  702 ,  703  and  704  to detect connection intensity of base stations  202 ,  203  and  700  respectively. After obtaining the connection intensity information of each of base stations, the wireless apparatus  200  can change the base station that provides services according to connection intention information of each of base stations. Consequently, the wireless apparatus  200  transmits a handover request signal  705  to the base station  203 . After the base station  203  receives the handover request signal  705 , it transmits a first report signal  706  to the base control station  204 . The base control station  204  determines whether to accept a request of the first report signal  706  according to the information of connection intensity of the wireless network, a service bandwidth and a data linking priority of the wireless apparatus in the first report signal  706 . If the request of the first report signal  706  is accepted, a reservation signal  707  is transmitted to the base station  203  and the base station  700  to reserve the required resources for providing services. Furthermore, according to the reservation signal  707 , the base station  203  transmits a notice signal  708  to the wireless apparatus  200  so that the wireless apparatus  200  receives a distributing result of the base control station  204 . 
         [0071]    After the wireless apparatus  200  receives the notice signal  708 , it determines whether to accept the distribution result of the base control station  204 . If no, the handover request signal  705  is transmitted continuously. If yes, the distributing result of the base control station  204  is accepted and a decision signal  709  is transmitted to the base station  203 . The base station  203  then transmits the decision signal  709  to the base control station  204 . The base control station  204  determines whether the wireless apparatus  200  accepts the distributing result of the base control station  204  according to the decision signal  709 . If no, all base stations that provide services are remained the same. If yes, the base control station  204  transmits an allocation signal  710  to all the base stations to inform all base stations that the service  209  will be changed from the base station  203  to the base station  700  for providing. Later, the base station  700  transmits an upload signal  711  and a download signal  712  to the wireless apparatus  200  so that the wireless apparatus  200  recognizes current uploading and downloading conditions of each of the base stations. Finally, the base station  203  provides the services  207 , the base station  202  provides the service  208 , and the base station  700  provides the service  209 . 
         [0072]    In the fourth embodiment, if the handover request signal  705  comprises the information of connection intensity only, the base control station  204  can actively inform the wireless apparatus  200  via the reservation signal  707  to perform the handover operation for adjusting the base station that provides services  207 ,  208  and  209 . 
         [0073]    A fifth embodiment of the invention is shown in  FIG. 8A ,  8 B,  8 C and  8 D which are flow charts of a handover control method of a wireless network handover system conforming to the WiMAX specification. The handover system comprises a wireless apparatus, a base station A, a base station B, a base station C and a base control station. Assume that the base station A is a main base station. Consequently, step  800  is executed for providing an upload signal and a download signal to the wireless apparatus, wherein the upload signal comprises all necessary information related to uploading and the download signal comprises all necessary information related to downloading. When the wireless apparatus obtains the necessary information, it is able to communicate with the base station A, the base station B and the base station C. Detailed contents of the upload signal and the download signal are signals conforming to the WiMAX wireless network specification and no further descriptions are given here. 
         [0074]    Later, the base station A executes step  801  for providing services C 1 , C 2  and C 3  for the wireless apparatus. In the fifth embodiment, three services simultaneously provided by the base station A are switched to the base station B and the base station C via the handover operation. Step  802  is executed for transmitting measurement signals to detect connection intensity of base stations A, B and C that provide services for the wireless apparatus, wherein a technique for detecting connection intensity conforms to the WiMAX wireless network specification and no further descriptions are given here. After receiving the connection intensity information of each base station, the wireless apparatus can change the base station that provides service according to the connection intensity information of each base station. Consequently, step  803  is executed for transmitting a handover request signal to the base station A, wherein the handover request signal comprises the information of connection intensity of the wireless network, a service bandwidth and a data linking priority of the wireless apparatus. Step  804  is executed for receiving the handover request signal by the base station A. Later, step  805  is executed for transmitting a first report signal from the base station A to the base control station according to the content of the handover request signal  213 . 
         [0075]    Step  806  is executed for receiving the first report signal by the base control station. Next, step  807  is executed for determining whether to accept a request of the first report signal according to the information of the connection intensity of the wireless network, the service bandwidth and the data linking priority of the wireless network. In the following, the connection intensity and the remaining resources are represented as numbers for convenience of understanding, and the wireless apparatus is just located within a range that base stations A, B and C can provide services. For example, connection intensity of the wireless network of the base station A is  5  and its remaining resource is  2 , connection intensity of the wireless network of the base station B is  10  and its remaining resource is  5 , and connection intensity of the wireless network of the base station C is  15  and its remaining resource is  3 ; and the required resources and the priorities of the connection services C 1 , C 2  and C 3  of the wireless apparatus are ( 6 , 3 ), ( 4 , 1 ) and ( 2 , 2 ) respectively. In the fifth embodiment, the priority with a smaller value means higher priority and the connection intensity of the wireless network with a larger value means stronger connection intensity. At first, considering ordering of the priorities. The service C 1 , the service C 2  and the service C 3  are distributed to the base station A, the base station B and the base station C respectively Next, step  807  is executed for determining whether the remaining resources of each base station are enough for providing corresponding services to distribute the service C 1 , the service C 2  and the service C 3  to the base station A, the base station B and the base station C respectively. Next, step  808  is executed for generating a reservation signal. Later, step  809  is executed for transmitting the reservation signal to all base stations that provide services so that all base stations that provide services reserve necessary resources of services for providing. In the fifth embodiment, all base stations providing services are the base station A, the base station B, and the base station C. 
         [0076]    Step  810  is executed to enable the base station A for receiving the reservation signal. Next, step  811  is executed for transmitting a notice signal to the wireless apparatus according to the reservation signal so that the wireless apparatus receives a distributing result of the base control station. Step  812  is executed to enable the wireless apparatus for receiving the distributing result of the base control station. Step  813  is executed for deciding whether to accept the distributing result of the base control station. If no, the handover request signal is transmitted continuously. If yes, the distributing result of the base control station is accepted. Next, step  814  is executed for transmitting a decision signal to the base station A. Next, step  815  is executed to enable the base station A for transmitting the decision signal to the base control station. Next, step  816  is executed to enable the base control station for receiving the decision signal. Step  817  is executed for determining whether the wireless apparatus accepts the distributing result of the base control station according to the decision signal. If no, the reserved resources on each base station are not allocated. If yes, step  818  is executed for transmitting an allocation signal to all base stations that provide services (comprising the base station A, the base station B, and the base station C) so that all base stations that provide services allocate the reserved resources. For the base station A as an example, step  819  is executed to enable the base station A for receiving the allocation signal. Later, step  820  is executed for determining whether the base station A is the main base station according to the allocation signal. If no, the upload signal and the download signal are stopped transmitting to the wireless apparatus. If yes, step  821  is executed to enable the base station A for transmitting the upload signal and the download signal to the wireless apparatus so that the wireless apparatus can understand uploading and downloading conditions of each of the base stations. Finally, services C 1 , C 2  and C 3  are separately provided by base stations A, B and C to complete the handover operation. 
         [0077]    In the fifth embodiment, if the handover request signal comprises the information of connection intensity only, the base control station can actively inform the wireless apparatus via the reservation signal to perform the handover operation for adjusting the base station that provides services C 1 , C 2  and C 3 . 
         [0078]    A sixth embodiment of the invention is shown in  FIG. 9A ,  9 B and  9 C, which is a flow chart of a handover control method of a wireless network handover system conforming to the WiMAX specification. In the sixth embodiment, a main base station is changed form a base station A to a base station C according to a handover operation as an example, and an initial state is that current services C 1 , C 2  and C 3  are provided by base stations A, B and C respectively. The main base station is the base station A. 
         [0079]    At first, step  900  is executed to enable the wireless apparatus for transmitting a handover request signal to the base station A. Next, step  901  is executed to enable the base station A for receiving the handover request signal. Step  902  is executed to enable the base station A for transmitting a first report signal to the base control station. Next, step  903  is executed to enable the base control station for receiving the first report signal. Step  904  is executed for determining whether to accept a request of the first report signal according to the information of connection intensity of the wireless network, a service bandwidth and a data linking priority of the wireless apparatus in the first report signal. If the request of the first report signal is accepted, step  905  is executed for transmitting a reservation signal to the base station A. Next, step  906  is executed to enable the base station A for transmitting a notice signal to the wireless apparatus according to the reservation signal by the base station A so that the wireless apparatus gets a distributing result of the base control station. 
         [0080]    Next, step  907  is executed to enable the wireless apparatus for receiving the notice signal. Step  908  is executed to enable the wireless apparatus for determining whether to accept the distributing result of the base control station. If no, the handover request signal is transmitted continuously. If yes, the distributing result of the base control station is accepted and step  909  is executed to enable the wireless apparatus for transmitting a decision signal to the base station A. Next, step  910  is executed to enable the base station A for transmitting the decision signal to the base control station. Next, step  911  is executed to enable the base control station for receiving the decision signal, and step  912  is executed for determining whether the wireless apparatus accepts the distributing result of the base control station according to the decision signal. If no, the main base station is still the base station A. If yes, step  913  is executed to enable the base control station for transmitting an allocation signal to all the base stations (comprising the base station A, the base station B and the base station C) so that all base stations know the main base station is changed from the base station A to the base station C. 
         [0081]    Next, step  914  is executed to enable the base station C for transmitting an upload signal and a download signal to the wireless apparatus so that the wireless apparatus can understand current uploading and downloading conditions of each base station. Finally, services C 1 , C 2  and C 3  are still provided by base stations A, B and C. In the sixth embodiment, if the handover request signal comprises the information of connection intensity only, the base control station can actively inform the wireless apparatus via the reservation signal to perform the handover operation for adjusting the main base station that provides the upload signal and the download signal. 
         [0082]    A seventh embodiment of the invention is shown in  FIG. 10A ,  10 B and  10 C, which is a flow chart of a handover control method of a wireless network handover system conforming to the WiMAX specification. In the seventh embodiment, a base station A is changed to a base station C to provide a service C 1  according to a handover operation as an example, and an initial state is that current services C 1 , C 2  and C 3  are provided by base stations A, B and C respectively. A main base station is the base station C. 
         [0083]    At first, step  1000  is executed to enable the wireless apparatus for transmitting a handover request signal to the base station C. Next, step  1001  is executed to enable the base station C for receiving the handover request signal. Next, step  1002  is executed for transmitting a first report signal to the base control station. Next, step  1003  is executed to enable the base control station for receiving the first report signal. Step  1004  is executed to enable the base control station for determining whether to accept a request of the first report signal according to the information of connection intensity of the wireless network, a service bandwidth and a data linking priority of the wireless apparatus in the first report signal. If the request of the first report signal is accepted, step  1005  is executed for transmitting a reservation signal to the base station C. Next, step  1006  is executed to enable the base station C for transmitting a notice signal to the wireless apparatus according to the reservation signal so that the wireless apparatus gets a distributing result of the base control station. 
         [0084]    Next, step  1007  is executed to enable the wireless apparatus for receiving the notice signal. Step  1008  is executed to enable the wireless apparatus for determining whether to accept the distributing result of the base control station. If no, the handover request signal is transmitted continuously. If yes, the distributing result of the base control station is accepted and step  1009  is executed to enable the wireless apparatus for transmitting a decision signal to the base station C. Next, step  1010  is executed to enable the base station C for transmitting the decision signal to the base control station. Next, step  1011  is executed to enable to base control station for receiving the decision signal, and step  1012  is executed for determining whether the wireless apparatus accepts the distributing result of the base control station according to the decision signal. If no, all base stations that provide services do not change. If yes, step  1013  is executed to enable the base control station for transmitting an allocation signal to all the base stations (comprising the base station B, the base station C and the base station D) so that all base stations know the base station that provides the service C 1  is already changed from the base station A to the base station C. Later, step  1014  is executed to enable the base station C for transmitting an upload signal and a download signal to the wireless apparatus so that the wireless apparatus can receive current uploading and downloading conditions of each base station. 
         [0085]    Finally, the base station C provides the service C 1  and C 3 , and the base station B provides the service C 2 . 
         [0086]    In the seventh embodiment, if the handover request signal comprises the information of connection intensity only, the base control station can actively inform the wireless apparatus via the reservation signal to perform the handover operation for adjusting base stations that provide services C 1 , C 2  and C 3 . 
         [0087]    An eighth embodiment of the invention is shown in  FIG. 11A ,  11 B and  11 C, which is a flow chart of a handover control method of a wireless network handover system conforming to the WiMAX specification. The defference between the eighth embodiment and the seventh embodiment is that a base station D is newly added as an example for illustrating how to change a base station C that provides a service C 3  to the newly added base station D via a handover operation. An initial state is that current services C 1  and C 3  are provided by the base station C, and a service C 2  is provided by a base station B. A main base station is the base station C. 
         [0088]    After the wireless apparatus confirms the connection intensity information of the base station B, the base station C and the base station D, the wireless apparatus can change the base station that provides services according to the connection intensity information of each base station. Consequently, the wireless apparatus executes step  1100  for transmitting a handover request signal to the base station C. Next, step  1101  is executed to enable the base station C for receiving the handover request signal. Step  1102  is executed to enable the base station C for transmitting a first report signal to the base control station. Next, step  1103  is executed to enable the base control station for receiving the first report signal. Step  1104  is executed for determining whether to accept a request of the first report signal according to the information of connection intensity of the wireless network, a service bandwidth and a data linking priority of the wireless apparatus in the first report signal by the base control station. If the request of the first report signal is accepted, step  1105  is executed for transmitting a reservation signal to the base station C and the base station D to reserve the required resources for providing services. Next, step  1106  is executed to enable the base station C for transmitting a notice signal to the wireless apparatus according to the reservation signal so that the wireless apparatus gets a distributing result of the base control station. 
         [0089]    Next, step  1107  is executed to enable the wireless apparatus for receiving the notice signal. Step  1108  is executed for determining whether to accept the distributing result of the base control station by the wireless apparatus. If no, the handover request signal is transmitted continuously. If yes, the distributing result of the base control station is accepted and step  1109  is executed for transmitting a decision signal to the base station C. Next, step  1110  is executed to enable the base station C for transmitting the decision signal to the base control station. Step  1111  is executed to enable the base control station for receiving the decision signal, and step  1112  is executed for determining whether the wireless apparatus accepts the distributing result of the base control station according to the decision signal. If no, all base stations that provide services do not change. If yes, step  1113  is executed to enable the base control station for transmitting an allocation signal to all the base stations (comprising the base station A, the base station B and the base station C) so that all base stations receive a message of the base station that provides the service C 3  is already changed from the base station C to the base station D. Later, step  1114  is executed to enable the base station C for transmitting an upload signal and a download signal to the wireless apparatus so that the wireless apparatus can understand current uploading and downloading conditions of each base station. Finally, the base station C provides the service C 1 , the base station B provides the service C 2 , and the base station D provides the service C 3 . 
         [0090]    In the eighth embodiment, if the handover request signal comprises the information of connection intensity only, the base control station can actively inform the wireless apparatus via the reservation signal to perform the handover operation for adjusting base stations that provide services C 1 , C 2  and C 3 . 
         [0091]    A ninth embodiment of the invention is shown in  FIG. 12A ,  12 B,  12 C and  12 D which is a flow chart of a handover control method of a wireless network handover system  2  conforming to the WiMAX specification. The handover system comprises a wireless apparatus  200 , a base station  201 , a base station  202 , a base station  203  and a base control station  204 . In this embodiment, the base station  201  is a main base station. Consequently, step  1200  is executed to enable the base station  201  to provide an upload signal and a download signal for the wireless apparatus by the base station  201 , wherein the upload signal comprises all necessary information related to uploading and the download signal comprises all necessary information related to downloading. The wireless apparatus can communicate with the base station  201 , the base station  202  and the base station  203  according to the information. Detailed contents of the upload signal and the download signal are signals conforming to the WiMAX wireless network specification and no further descriptions are given here. 
         [0092]    In the ninth embodiment, three services simultaneously provided by one base station are distributed to three different base stations via the handover operation as an example. In step  1201 , the base station  201  provides services  207 ,  208  and  209  for the wireless apparatus. In step  1202 , the wireless apparatus transmits measurement signals to detect connection intensity of base stations  201 ,  202  and  203 , wherein a technique for detecting the connection intensity conforms to the WiMAX wireless network specification. After obtaining the connection intensity information of each base station, the wireless apparatus  200  can change the base station that provides service according to the connection intensity information of each base station. Next, step  1203  is executed to enable the wireless apparatus  200  for transmitting a handover request signal to the base station  201 , wherein the handover request signal comprises the information of connection intensity of the wireless network, a service bandwidth and a data linking priority of the wireless apparatus. Next, step  1204  is executed to enable a third receiving module of the base station  201  for receiving the handover request signal. Later, step  1205  is executed to enable the transmitting module of the base station  201  for transmitting a first report signal to the base control station  204  according to the content of the handover request signal. 
         [0093]    Next, step  1206  is executed to enable the receiving module of the base control station for receiving the first report signal. Next, step  1207  is executed to enable the receiving module of the base control station for determining whether to accept a request of the first report signal according to the information of the connection intensity of the wireless network, the service bandwidth and the data linking priority of the wireless network. The determination manners are shown as the following example. As aforementioned, assume that connection intensity of the wireless network of the base station  201  is  5  and its remaining resource is  2 , connection intensity of the wireless network of the base station  202  is  10  and its remaining resource is  5 , and connection intensity of the wireless network of the base station  203  is  15  and its remaining resource is  3 ; and the required resources and priorities of services  207 ,  208  and  209  are ( 6 , 3 ), ( 4 , 1 ) and ( 2 , 2 )respectively. In the ninth embodiment, the priority with a smaller value means higher priority and the connection intensity of the wireless network with a larger value means stronger connection intensity. According to sorted priorities, the service  207 , the service  208  and the service  209  are distributed to the base station  201 , the base station  203  and the base station  202 respectively. Next, considering the remaining resources of each base station. Consequently, the receiving module finally distributes service  207 , the service  208  and the service  209  to the base station  201 , the base station  202  and the base station  203 respectively. Next, step  1208  is executed to enable the receiving module for generating a reservation signal. Later, step  1209  is executed to enable the transmitting module for transmitting the reservation signal to all base stations that provide services so that all base stations that provide services reserve necessary resources of services for providing. Step  1210  is executed to enable the receiving module of the base station  201  for receiving the reservation signal. Next, step  1211  is executed to enable the transmitting module of the base station  201  for transmitting a notice signal to the wireless apparatus according to the reservation signal so that the wireless apparatus receives a distributing result of the base control station. 
         [0094]    Next, step  1212  is executed to enable the wireless apparatus for receiving notice signal. Step  1213  is executed for deciding whether to accept the distributing result of the base control station. If no, the handover request signal is transmitted continuously. If yes, the distributing result of the base control station is accepted and step  1214  is executed to enable the wireless apparatus for transmitting a decision signal to the base station  201 . Next, step  1215  is executed to enable the transmitting module of the base station  201  for transmitting the decision signal to the base control station. Next, step  1216  is executed to enable the receiving module of the base control station for receiving the decision signal. Step  1217  is executed to enable the receiving module for determining whether the wireless apparatus accepts the distributing result of the base control station according to the decision signal. If no, the reserved resources on each base station are not allocated. If yes, step  1218  is executed to enable the transmitting module for transmitting an allocation signal to all base stations that provide services so that all base stations that provide services allocate the reserved resources. Next, step  1219  is executed to enable the receiving module of the base station  201  for receiving the allocation signal. Later, step  1220  is executed to enable the determining module of the base station  201  for determining whether the base station  201  is the main base station according to the allocation signal. If no, the upload signal and the download signal are stopped transmitting to the wireless apparatus. If yes, step  1221  is executed to enable the base station  201  for re-transmitting the upload signal and the download signal to the wireless apparatus so that the wireless apparatus can receive the upload and download signals of each of the base stations. Finally, services  207 ,  208  and  209  are separately provided by base stations  201 ,  202  and  203  to complete the handover operation. 
         [0095]    In the ninth embodiment, if the handover request signal comprises the information of connection intensity only, the base control station can actively inform the wireless apparatus via the reservation signal to perform the handover operation for adjusting the base station that provides services  207 ,  208  and  209 . 
         [0096]    A tenth embodiment of the invention is shown in  FIGS. 13A ,  13 B and  13 C, which is a flow chart of a handover control method of a wireless network handover system  5  conforming to the WiMAX specification. The handover system comprises a wireless apparatus  200 , a base station  201 , a base station  202 , a base station  203  and a base control station  204 . In the tenth embodiment, a main base station is changed form a base station  201  to a base station  203  according to a handover operation as an example, and an initial state is that current services  207 ,  208  and  209  are provided by base stations  201 ,  202  and  203  respectively. The main base station is the base station  201 . 
         [0097]    Step  1300  is executed to enable the wireless apparatus  200  for transmitting a handover request signal  500  to the base station  201 . Step  1301  is executed to enable a receiving module  300  of the base station  201  for receiving the handover request signal  500 . Step  1302  is executed to enable a receiving module  301  of the base station  201  for transmitting a first report signal  501  to the base control station  204 . Step  1303  is executed to enable a receiving module  400  of the base control station  204  for receiving the first report signal  501 . Later, step  1304  is executed to enable the receiving module  400  for determining whether to accept a request of the first report signal  501  according to the information of connection intensity of the wireless network, a service bandwidth and a data linking priority of the wireless apparatus in the first report signal  501 . If the request of the first report signal  501  is accepted, step  1305  is executed to enable a transmitting module  401  for transmitting a reservation signal  502  to the base station  201 . Next, step  1306  is executed to enable the transmitting module  301  of the base station  201  for transmitting a notice signal  503  to the wireless apparatus  200  according to the reservation signal  502  so that the wireless apparatus  200  receives a distributing result of the base control station  204 . 
         [0098]    Next, step  1307  is executed to enable the wireless apparatus  200  for receiving the notice signal  503 . Step  1308  is executed for determining whether to accept the distributing result of the base control station  204 . If no, the handover request signal  500  is transmitted continuously If yes, the distributing result of the base control station  204  is accepted and step  1309  is executed to enables the wireless apparatus  200  for transmitting a decision signal  504  to the base station  201 . Next, step  1310  is executed to enable the transmitting module  301  of the base station  201  for transmitting the decision signal  504  to the base control station  24 . Next, step  1311  is executed to enable the receiving module  400  of the base control station  24  for receiving the decision signal  504 . Next, step  1312  is executed to enable the receiving module  400  for determining whether the wireless apparatus  200  accepts the distributing result of the base control station  204  according to the decision signal  504 . If no, the main base station is the base station  201 . If yes, step  1313  is executed to enable a transmitting module  401  of the base control station  204  for transmitting an allocation signal  505  to all the base stations (comprising the base station  201 , the base station  202  and the base station  203 ) so that all base stations receive a message that the main base station is changed from the base station  201  to the base station  203 . 
         [0099]    Next, step  1314  is executed to enable the base station  203  for transmitting an upload signal  506  and a download signal  507  to the wireless apparatus  200  so that the wireless apparatus  200  can understand current uploading and downloading conditions of each base station. 
         [0100]    In the tenth embodiment, if the handover request signal  500  comprises the information of connection intensity only, the base control station  204  can actively inform the wireless apparatus  200  via the reservation signal  502  to perform the handover operation for adjusting the main base station that provides the upload signal  506  and the download signal  507 . 
         [0101]    An eleventh embodiment of the invention is shown in  FIG. 14A ,  14 B and  14 C, which is a flow chart of a handover control method of a wireless network handover system  6  conforming to the WiMAX specification. The handover system comprises a wireless apparatus  200 , a base station  201 , a base station  202 , a base station  203  and a base control station  204 . In the eleventh embodiment, a base station  201  is changed to a base station  203  to provide a service  207  according to a handover operation as an example, and an initial state is that current services  207 ,  208  and  209  are provided by base stations  201 ,  202  and  203 respectively. A main base station is the base station  203 . 
         [0102]    At first, step  1400  is executed to enable the wireless apparatus  200  for transmitting a handover request signal  600  to the base station  203 . Step  1401  is executed to enable a receiving module  300  of the base station  203  for receiving the handover request signal  600 . Step  1402  is executed to enable a transmitting module  301  of the base station  203  for transmitting a first report signal  601  to the base control station  204 . Step  1403  is executed for receiving the first report signal  601 . Step  1404  is executed to enable a receiving module  400  of the base control station  204  for determining whether to accept a request of the first report signal  601  according to the information of connection intensity of the wireless network, a service bandwidth and a data linking priority of the wireless apparatus in the first report signal  601  by the receiving module  400  of the base control station  204 . If the request of the first report signal  601  is accepted, step  1405  is executed to enable a transmitting module  401  of the base control station  204  for transmitting a reservation signal  602  to the base station  203 . Step  1406  is executed to enable a transmitting module  301  the base station  203  for transmitting a notice signal  603  to the wireless apparatus  200  according to the reservation signal  602  so that the wireless apparatus  200  receives a distributing result of the base control station  204 . 
         [0103]    Next, step  1407  is executed to enable the wireless apparatus  200  for receiving the notice signal  603 . Step  1408  is executed for determining whether to accept the distributing result of the base control station  204 . If no, the handover request signal  600  is transmitted continuously If yes, the distributing result of the base control station  204  is accepted and step  1409  is executed to enable the wireless apparatus  200  for transmitting a decision signal  604  to the base station  203 . Step  1410  is executed to enable the transmitting module  301  of the base station  203  for transmitting the decision signal  604  to the base control station  204 . Step  1411  is executed to enable the receiving module  400  of the base control station  204  for receiving the decision signal  604 . Step  1412  is executed to enable the receiving module  400  for determining whether the wireless apparatus  200  accepts the distributing result of the base control station  204  according to the decision signal  604 . If no, all base stations that provide services do not change. If yes, step  1413  is executed to enable the transmitting module  401  of the base control station  204  for transmitting an allocation signal  605  to all the base stations (comprising the base station  201 , the base station  202  and the base station  203 ) so that all base stations confirm the base station that provides the service  207  is already changed from the base station  201  to the base station  203 . Later, step  1414  is executed to enable the base station  203  for transmitting an upload signal  606  and a download signal  607  to the wireless apparatus  200  so that the wireless apparatus  200  can understand current uploading and downloading conditions of each base station. Finally, the base station  203  provides the service  207  and  209 , and the base station  202  provides the service  208 . 
         [0104]    In the eleventh embodiment, if the handover request signal  600  comprises the information of connection intensity only, the base control station  204  can actively inform the wireless apparatus  200  via the reservation signal  602  to perform the handover operation for adjusting base stations that provide services  207 ,  208  and  209 . 
         [0105]    A twelfth embodiment of the invention is shown in  FIG. 15A ,  15 B and  15 C, which is a flow chart of a handover control method of a wireless network handover system  7  conforming to the WiMAX specification. The handover system comprises a wireless apparatus  200 , a base station  700 , a base station  202 , a base station  203  and a base control station  204 , wherein the base station  700  is the same as the base station  202  and the base station  203  and no further descriptions are given here. In the twelfth embodiment, the base station  203  for providing a service  209  is changed as the newly added base station  700  for providing a service  209  via a handover operation. An initial state is that current services  207  and  209  are provided by the base station  203 , and a service  208  is provided by a base station  202 . A main base station is the base station  203 . 
         [0106]    After the wireless apparatus  200  confirms the connection intensity information of the base station  202 , the base station  203  and the base station  700 , the wireless apparatus  200  can change the base station that provides services according to the connection intensity information of each base station. Consequently, step  1500  is executed to enable the wireless apparatus  200  for transmitting a handover request signal  705  to the base station  203 . Step  1501  is executed to enable a receiving module  300  of the base station  203  for receiving the handover request signal  705 . Step  1502  is executed to enable a transmitting module  301  of the base station  203  for transmitting a first report signal  706  to the base control station  204 . Step  1503  is executed to enable a receiving module  400  of the base control station  204  for receiving the first report signal  706 . Step  1504  is executed to enable the receiving module  400  of the base control station  204  for determining whether to accept a request of the first report signal  706  according to the information of connection intensity of the wireless network, a service bandwidth and a data linking priority of the wireless apparatus  200  in the first report signal  706 . If the request of the first report signal  706  is accepted, step  1505  is executed to enable a transmitting module  401  of the base control station  204  for transmitting a reservation signal  707  to the base station  203  and the base station  700  to reserve the required resources for providing services. Step  1506  is executed to enable the transmitting module  300  of the base station  203  for transmitting a notice signal  708  to the wireless apparatus  200  according to the reservation signal  707  so that the wireless apparatus  200  receives a distributing result of the base control station  204 . 
         [0107]    Next, step  1507  is executed to enable the wireless apparatus  200  for receiving the notice signal  708 . Step  1508  is executed to enable the wireless apparatus  200  for determining whether to accept the distributing result of the base control station  204 . If no, the handover request signal  705  is transmitted continuously. If yes, the distributing result of the base control station  204  is accepted and step  1509  is executed to enable the wireless apparatus  200  for transmitting a decision signal  709  to the base station  203 . Step  1510  is executed to enable the transmitting module  301  of the base station  203  for transmitting the decision signal  709  to the base control station  204 . Step  1511  is executed to enable the receiving module  400  of the base control station  204  for receiving the decision signal  709 . Step  1512  is executed to enable the receiving module  400  of the base control station  204  for determining whether the wireless apparatus  200  accepts the distributing result of the base control station  204  according to the decision signal  709 . If no, all base stations that provide services do not change. If yes, step  1513  is executed to enable the transmitting module  401  of the base control station  204  for transmitting an allocation signal  710  to all the base stations (comprising the base station  700 , the base station  202  and the base station  203 ) so that all base stations confirm that the base station that provides the service  209  is already changed from the base station  203  to the base station  700 . Next, step  1514  is executed to enable the base station  203  for transmitting an upload signal  711  and a download signal  712  to the wireless apparatus  200  so that the wireless apparatus  200  can receive current uploading and downloading conditions of each base station. Finally, the base station  203  provides the service  207 , the base station  202  provides the service  208 , and the base station  700  provides the service  209 . 
         [0108]    In the twelfth embodiment, if the handover request signal  705  comprises the information of connection intensity only, the base control station  204  can actively inform the wireless apparatus  200  via the reservation signal  707  to perform the handover operation for adjusting base stations that provide services  207 ,  208  and  209 . 
         [0109]    The aforementioned methods can use a computer readable medium for storing a computer program to execute the aforementioned steps. The computer readable medium can be a floppy disk, a hard disk, an optical disk, a flash disk, a tape, a database accessible from a network or a storage medium with the same functionality that can be easily thought by people skilled in the art. 
         [0110]    The invention can dynamically determine the base station that provides services so that the service of the wireless apparatus can be provide by the base station with better signal. If no base station can provide all services of the wireless apparatus, the invention can reserve services with higher priority to be provided by the base station depending on the priorities of each service. Consequently, the invention enables the resource of each base station to be utilized effectively and services required by users can be kept without incurring interrupt to further enhance a utilization ratio of all base stations. 
         [0111]    The above disclosure is related to the detailed technical contents and inventive features thereof. People skilled in this field may proceed with a variety of modifications and replacements based on the disclosures and suggestions of the invention as described without departing from the characteristics thereof. Nevertheless, although such modifications and replacements are not fully disclosed in the above descriptions, they have substantially been covered in the following claims as appended.