Wireless communication apparatus
According to embodiments, a wireless communication apparatus supports at least a second wireless communication scheme between a first, wireless communication scheme and the second wireless communication scheme. The first wireless communication scheme requires that a wireless medium is determined to be busy when a reception level is equal to or greater than a minimum reception sensitivity level of physical scheme. The apparatus includes a first processing unit and a second processing unit. The first processing unit is configured to set a value lower than a maximum transmission power of the first wireless communication scheme, for a maximum transmission power of the second wireless communication scheme and set a value greater than the minimum reception sensitivity level, of the physical scheme, for a carrier sense level, when the second wireless communication scheme is used. The second processing unit is configured to carry out carrier sense using the carrier sense level.
1. A wireless communication apparatus supporting at least a second wireless communication scheme between a first wireless communication scheme and the second wireless communication scheme, wherein the first wireless communication scheme requires a carrier sense level to be a minimum reception sensitivity level of a physical scheme, the apparatus comprising
a first processing unit configured to set a value lower than a maximum transmission power of the first wireless communication scheme, for a maximum transmission power of the second wireless communication scheme, and to set a value greater than the minimum reception sensitivity level of the physical scheme, for the carrier sense level, when the second wireless communication scheme is used;
a second processing unit configured to carry out carrier sense using the carrier sense level; and
a third processing unit configured to control transmission and reception of a signal via the second processing unit,
wherein the second wireless communication scheme is close proximity scheme.
2. The apparatus according to claim 1 , wherein the second processing unit decodes a reception signal and passes information on the reception signal to the third processing unit when a reception level is equal to or greater than the carrier sense level, and avoids decoding the reception signal when the reception level is less than the carrier sense level, and the third processing unit passes information on a transmission signal to the second processing unit when the reception level is less than the carrier sense level.
3. The apparatus according to claim 1 , wherein the first processing unit sets a value of the minimum reception sensitivity level of the physical scheme, for the carrier sense level, when the first wireless communication scheme is used.
4. The apparatus according to claim 1 , wherein the third processing unit inserts information indicating that an attribute of a wireless communication group operated by the apparatus is the second wireless communication scheme in a frame body field of at least one of a beacon frame and a probe response frame, when the second wireless communication scheme is used, and the second processing unit transmits at least one of the beacon frame and the probe response frame.
5. The apparatus according to claim 1 , wherein the third processing unit excludes a period for another wireless communication apparatus using the first wireless communication scheme to transmit a data frame, from a schedule within a beacon interval, when the second wireless communication scheme is used.
6. The apparatus according to claim 1 , wherein the first processing unit sets a contention parameter specifying a contention window narrower than a contention window for the first wireless communication scheme when the second wireless communication scheme is used.
7. The apparatus according to claim 1 , wherein the first processing unit ignores a network identifier included in reception signal information when the second wireless communication scheme is used.
8. The apparatus according to claim 1 , further comprising an antenna.
9. A wireless communication method for a wireless communication apparatus, the wireless communication apparatus supporting at least a second wireless communication scheme between a first wireless communication scheme and the second wireless communication scheme, the first wireless communication scheme requiring a carrier sense level to be a minimum reception sensitivity level of a physical scheme, and the method comprising:
performing first processing to set a value lower than a maximum transmission power of the first wireless communication scheme, for a maximum transmission power of the second wireless communication scheme, and to set a value greater than the minimum reception sensitivity level of the physical scheme, for the carrier sense level, when the second wireless communication scheme is used;
performing second processing to carry out carrier sense using the carrier sense level; and
performing third processing to control transmission and reception of a signal performed via the second processing,
wherein the second wireless communication scheme is close proximity scheme.
10. The method according to claim 9 , wherein the second processing decodes a reception signal and passes information on the reception signal to the third processing when a reception level is equal to or greater than the carrier sense level, and avoids decoding the reception signal when the reception level is less than the carrier sense level, and the third processing passes information on a transmission signal to the second processing when the reception level is less than the carrier sense level.
11. The method according to claim 9 , wherein the first processing sets a value of the minimum reception sensitivity level of the physical scheme, for the carrier sense level, when the first wireless communication scheme is used.
12. The method according to claim 9 , wherein the third processing inserts information indicating that an attribute of a wireless communication group operated by the apparatus is the second wireless communication scheme in a frame body field of at least one of a beacon frame and a probe response frame, when the second wireless communication scheme is used, and the second processing transmits at least one of the beacon frame and the probe response frame.
13. The method according to claim 9 , wherein the third processing excludes a period for another wireless communication apparatus using the first wireless communication scheme to transmit a data frame, from a schedule within a beacon interval, when the second wireless communication scheme is used.
14. The method according to claim 9 , wherein the first processing sets a contention parameter specifying a contention window narrower than a contention window for the first wireless communication scheme when the second wireless communication scheme is used.
15. The method according to claim 9 , wherein the first processing ignores a network identifier included in reception signal information when the second wireless communication scheme is used.