Wireless communication method and apparatus
A wireless communication device and wireless communication technology, applied in the direction of data exchange through path configuration, digital transmission system, data exchange network, etc., can solve the problem of not being able to control media access to multiple channels
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
no. 1 example
[0040] like figure 1 As shown, the wireless communication device according to the first embodiment generally includes a physical layer 10 , a MAC layer 20 and a link layer 30 . refer to figure 1 , the physical layer 10 corresponds to two physical layer protocols using channels with different frequency bands. More specifically, the physical layer 10 includes a first physical layer protocol processing means 11 for performing physical layer protocol processing on communication using a first channel having a first frequency band, and a first physical layer protocol processing device 11 using a channel having a bandwidth larger than the first frequency band and intersecting with the first frequency band. The second physical layer protocol processing device 12 performs physical layer protocol processing on the communication of the second channel of the overlapping second frequency band. The first physical layer protocol processing means 11 and the second physical layer protocol pr...
no. 2 example
[0111] Figure 8 and 10 The network configuration according to the second embodiment of the present invention is shown. refer to Figure 8 and 10 , 40M STA_1 tries to transmit a frame to 40M STA_2 by using a 40MHz channel. 20M_ch_a and 20M_ch_b are respectively used in different Basic Service Sets (BSS) to independently perform medium access. refer to Figure 8 and 10 , consider a case where BSS_a to which 40M STA_1 is connected uses 20M_ch_a, and BSS_b adjacent to or overlapping with BSS_a uses 20M_ch_b.
[0112] In 20M_ch_a, medium access is performed by DCF or EDCA. In 20M_ch_b, medium access can be done by DCF or EDCA or PCF or HCCA. Figure 8 A case is shown in which medium access is performed by DCF or EDCA in both 20M_ch_a and 20M_ch_b. Figure 10 A case is shown in which medium access is performed by DCF or EDCA in 20M_ch_a and by PCF or HCCA in 20M_ch_b.
[0113] The following will refer to Figure 9A , 9B, and 11A and 11B describe the physical mode and car...
no. 3 example
[0149]
[0150] According to the second embodiment described above, if 20M_ch_b cannot be reserved for a long period of time after 20M_ch_a is reserved because 20M_ch_b is maintained in a busy state, that is, if 40M STA_1 does not receive CTSb through 20M_ch_b within a predetermined time period after receiving CTSa through 20M_ch_a, 40M STA_1 determines a timeout, and transmits a NAV unlock frame through 20M_ch_a to release the transmission prohibition status due to RTS / CTS implementation of 20M_ch_a.
[0151] As a comparison, according to the third embodiment of the present invention, if the 40M frequency band cannot be guaranteed in this manner, the previously reserved 20M_ch frequency band is prevented from being set in an idle state for a long period of time so as not to waste any frequency band.
[0152] That is, in the third embodiment of the present invention, if 20M_ch_b cannot be reserved for a long period of time after reserving 20M_ch_a because 20M_ch_b maint...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More