Communication system, wireless communication apparatus, and communication method
A wireless communication circuit includes a receiver to receive at least one of a beacon frame and a probe response frame from a first wireless communication apparatus belonging to a first communication group, at least one of the beacon frame and the probe response frame including first security information indicating a first encryption method. The circuit includes a transmitter to transmit an association request frame to the first wireless communication apparatus, the association request frame including second security information indicating a second encryption method which is supported by the wireless communication circuit, after a determination that the second encryption method overlaps with the first encryption method. The transmitter declines to associate with the first wireless communication apparatus if the first encryption method fails to overlap with the second encryption method. The transmitter transmits a data frame including a frame body after a reception of an association response frame.
1. A wireless communication circuit comprising:
a receiver configured to receive at least one of a beacon frame and a probe response frame from a first wireless communication apparatus belonging to a first communication group, at least one of the beacon frame and the probe response frame including first security information indicating a first encryption method, the first encryption method to be applied to data transmitted to wireless communication apparatuses belonging to the first communication group; and
a transmitter configured to transmit an association request frame to the first wireless communication apparatus, the association request frame including second security information indicating a second encryption method which is supported by the wireless communication circuit, after a determination that the second encryption method overlaps with the first encryption method, and configured to decline to associate with the first wireless communication apparatus, if the first encryption method fails to overlap with the second encryption method, and configured to transmit a data frame including a frame body, the frame body including data encrypted by the second encryption method, after a reception of an association response frame including a status code that indicates successful association with the first wireless communication apparatus,
wherein the association request frame includes a frame control field and a frame body, the frame body includes the second security information, the frame control field includes a type field, and the type field includes information indicating that the association request frame is classified as a management frame.
2. The wireless communication circuit according to claim 1 , wherein the first encryption method corresponds to one of a first encryption algorithm having a first encryption strength and the first encryption algorithm having a second encryption strength different from the first encryption strength, and the second encryption method corresponds to one of the first encryption algorithm having the first encryption strength and the first encryption algorithm having the second encryption strength.
3. The wireless communication circuit according to claim 1 , wherein the second encryption method is the highest encryption strength in a plurality of encryption methods which is supported by the wireless communication circuit.
4. The wireless communication circuit according to claim 1 , wherein the association response frame includes an address indicating the first communication group.
5. The wireless communication circuit according to claim 1 , wherein the frame control field further includes a protected frame field, and the protected frame field includes information indicating whether the frame body includes encrypted information.
6. A wireless communication device comprising:
an antenna; and
a wireless communication circuit according to claim 1 ,
wherein the receiver of the wireless communication circuit receives one of the beacon frame and the probe response frame through the antenna, and
the transmitter of the wireless communication circuit transmits the first association request frame and the data frame through the antenna.
7. A wireless communication device comprising:
a processor;
a wireless communication circuit according to claim 1 ; and
an antenna,
wherein the processor receives information included in one of the beacon frame and the probe response frame by using both the receiver of the wireless communication circuit and the antenna, and
the processor transmits information to be included in the association request frame by using both the transmitter of the wireless communication circuit and the antenna.
8. A wireless communication device comprising:
an antenna;
a processor; and
a wireless communication circuit according to claim 1 ,
wherein the processor transmits first information to be included in the data frame by using both the transmitter of the wireless communication circuit and the antenna,
the processor receives second information included in a second data frame from the first wireless communication apparatus by using both the receiver of the wireless communication circuit and the antenna.
9. The wireless communication device according to claim 8 , wherein a type of the second information is either one of a video type, an audio type, or a text type, and the processor performs a process for the second information according to the type of the second information.
10. The wireless communication device according to claim 8 , further comprising:
a display, wherein the processor displays at least part of the second information on the display.
11. The wireless communication device according to claim 8 , further comprising:
a wired network interface, wherein the processor coupled to the wired network interface, and the processor receives third information via the wired network interface.
12. The wireless communication device according to claim 11 , wherein the processor generates fourth information based on the third information, and the processor transmits the fourth information to be included in a data frame by using both the transmitter of the wireless communication circuit and the antenna.
13. A wireless communication method comprising:
receiving at least one of a beacon frame and a probe response frame from a first wireless communication apparatus belonging to a first communication group, at least one of the beacon frame and the probe response frame including first security information indicating a first encryption method, the first encryption method to be applied to data transmitted to wireless communication apparatuses belonging to the first communication group;
transmitting an association request frame to the first wireless communication apparatus, the association request frame including second security information indicating a second encryption method, after a determination that the second encryption method overlaps with the first encryption method;
declining to associate with the first wireless communication apparatus, if the first encryption method fails to overlap with the second encryption method;
transmitting a data frame including a frame body, the frame body including data encrypted by the second encryption method, after a reception of an association response frame including a status code that indicates successful association with the first wireless communication apparatus,
wherein the association request frame includes a frame control field and a frame body, the frame body includes the second security information, the frame control field includes a type field, and the type field includes information indicating that the association request frame is classified as a management frame.
14. The wireless communication method according to claim 13 , wherein the first encryption method corresponds to one of a first encryption algorithm having a first encryption strength and the first encryption algorithm having a second encryption strength different from the first encryption strength, and the second encryption method corresponds to one of the first encryption algorithm having the first encryption strength and the first encryption algorithm having the second encryption strength.
15. The wireless communication method according to claim 13 , wherein the second encryption method is the highest encryption strength in a plurality of encryption methods which is supported.
16. The wireless communication method according to claim 13 , wherein the association response frame includes an address indicating the first communication group.
17. The wireless communication method according to claim 13 , wherein the frame control field further includes a protected frame field, and the protected frame field includes information indicating whether the frame body includes encrypted information.
18. The wireless communication method according to claim 13 , wherein one of the beacon frame and the probe response frame is received through an antenna, and the first association request frame and the data frame is transmitted through the antenna.
19. The wireless communication method according to claim 13 , wherein information included in one of the beacon frame and the probe response frame is received by a processor, and information to be included in the association request frame is transmitted by the processor.
20. The wireless communication method according to claim 13 , wherein first information to be included in the data frame is transmitted by a processor, and second information included in a second data frame from the first wireless communication apparatus is received by the processor.
21. The wireless communication method according to claim 20 , wherein a type of the second information is either one of a video type, an audio type, or a text type, and the processor performs a process for the second information according to the type of the second information.
22. The wireless communication method according to claim 20 , wherein at least part of the second information is displayed on a display by the processor.
23. The wireless communication method according to claim 20 , wherein the processor is coupled to a wired network interface, and third information is received via the wired network interface by the processor.
24. The wireless communication method according to claim 23 , wherein fourth information is generated based on the third information by the processor, and the fourth information to be included in a data frame is transmitted by the processor.