Mobile wireless communication system carrying out communication of a portable terminal, an information source server apparatus and a wireless communication gateway server apparatus

1. A mobile wireless communication system comprising:

an information server;

a portable terminal for carrying out a communication with the information server through a wireless communication line and comprising a buffer memory which stores information transmitted from the information server;

a plurality of wireless communication gateway servers, wherein a first of the plurality of wireless communication gateway servers is determined based on a position of the portable terminal, and comprises a buffer memory emulator which stores specification data representing a specification of the buffer memory and transmits the information from the information server to the portable terminal based on the specification data;

a switching apparatus for setting a connection between the portable terminal and said first wireless communication gateway server and for setting another connection between the portable terminal and a second wireless communication gateway server when the communication between the portable terminal and the first wireless communication gateway server congests; and

a wireless telephony server for informing the position of the portable terminal to the plurality of wireless communication gateway servers,

wherein said specification of the buffer memory comprises at least one of the buffer memory size and a consumed size of the buffer memory.

2. The mobile wireless communication system of claim 1 , wherein the first wireless communication gateway server requests the switching apparatus to change a connection from the one connection to said another connection based on the informed position.

3. The mobile wireless communication system of claim 1 , wherein the first wireless communication gateway server decides which of said plurality of wireless communication gateway servers comprises said second wireless communication gateway server.

4. The mobile wireless communication system of claim 1 ,

wherein the first wireless communication gateway server provides to said second wireless communication gateway server the specification data which is read from the buffer memory emulator, and

wherein said second wireless communication gateway server comprises a buffer memory emulator which stores the read specification data and wherein said second wireless communication gateway server transfers the information from the information server to the portable terminal based on the read specification data.

5. The mobile wireless communication system of claim 1 , further comprising:

a network connected to the first wireless communication gateway server, the second wireless communication gateway server, the switching apparatus and the wireless telephony server,

wherein the first wireless communication gateway server, the second wireless communication gateway server, the switching apparatus and the wireless telephony server are capable of communicating through the network.

6. The mobile wireless communication system of claim 1 ,

wherein the first wireless communication gateway server, the second wireless communication gateway server, the switching apparatus and the wireless telephony server are capable of communicating through the Internet.

7. The mobile wireless communication system of claim 1 comprising:

a satellite network connected to the first wireless communication gateway server, the second wireless communication gateway server, the switching apparatus and the wireless telephony server,

wherein the first wireless communication gateway server, the second wireless communication gateway server, the switching apparatus and the wireless telephony server are capable of communicating through the satellite network.

8. A mobile wireless communication system comprising:

an information server;

a portable terminal for carrying out a communication with the information server and comprising a buffer memory which stores the information transmitted from the information server;

a wireless communication gateway server comprising a buffer memory emulator which stores specification data which represents a specification of the buffer memory and a plurality of access points, a specific one of said plurality of access points being determined based on a position of the portable terminal, and for transferring the information from the information server to the portable terminal based on the specification data;

a switching apparatus for setting one connection between the portable terminal and a first of said plurality of access points and for setting another connection between the portable terminal and a second of said plurality of access points when the first access point congests; and

a wireless telephony server for informing the position of the portable terminal to the wireless communication gateway server,

wherein said specification of the buffer memory comprises at least one of the buffer memory size and a consumed size of the buffer memory.

9. The mobile wireless communication system of claim 8 , wherein the wireless communication gateway server requests the switching apparatus to change a connection from the one connection to the another connection based on the informed position.

10. The mobile wireless communication system of claim 8 , wherein the wireless communication gateway server refers to the specification data in the buffer memory emulator to access the portable terminal through the second access point.

11. The mobile wireless communication system of claim 8 , further comprising:

a network connected to the wireless communication gateway server, the switching apparatus and the wireless telephony server,

wherein the wireless communication gateway server, the switching apparatus and the wireless telephony server are capable of communicating through the network.

12. The mobile wireless communication system of claim 8 ,

wherein the wireless communication gateway server, the switching apparatus and the wireless telephony server are capable of communicating through the Internet.

13. The mobile wireless communication system of claim 8 further comprising:

a satellite network connected to the wireless communication gateway server, the switching apparatus and the wireless telephony server,

wherein the wireless communication gateway server, the switching apparatus and the wireless telephony server are capable of communicating through the satellite network.

14. The mobile wireless communication system of claim 1 , wherein the first wireless communication gateway server provides to said second wireless communication gateway server the specification data which is read from the buffer memory emulator.

15. The mobile wireless communication system of claim 1 , wherein said second wireless communication gateway server comprises a buffer memory emulator which stores the read specification data.

16. The mobile wireless communication system of claim 1 , wherein said second wireless communication gateway transfers the information from the information server to the portable terminal based on the read specification data.

17. The system of claim 1 , wherein at least one of the plurality of wireless communication gateway servers converts between a wireless communication protocol with the portable terminal and a network protocol with the information server.

18. The system of claim 1 , wherein the buffer memory emulator comprises a specification regarding the size of the buffer memory.

19. The system of claim 1 , wherein the buffer memory emulator comprises a specification regarding an amount of available memory in the buffer memory.

20. The system of claim 1 , further comprising a position register that registers a position of the portable terminal, wherein the wireless telephony server informs the position to the plurality of wireless communication gateway servers based upon the position registered in the position register.

21. The system of claim 20 , wherein the switching apparatus registers the position of the portable terminal in the position register.