IEEE Std 802.15.4t pdf free download

IEEE Std 802.15.4t pdf free download.Low-Rate Wireless Networks Amendment 4: Higher Rate (2 Mb/s) Physical (PHY) Layer.
10. General PHY requirements
10.1 General requirements and definitions
10.1.2 Channel assignments
10.1 .2.2 Channel numbering for 868 MHz, 915 MHz, and 2450 MHz bands
change the first paragraph of 10. 1.2.2 as bidicatt’d:
This subclause does not apply to the SUN PIIY. er—LECIM P1IY, or MSK PIIY specifications. For explanations of channel numbering for the SUN PI-lYs and LECIM PHYs, see 10.1.2.8 and 10.1.2.10, respectively. For explanations of channel niimbering for the MSK PHY. see 10.1.2.6.
10.1 .2.6 Channel numbering for MSK PHY 2450 MHz band
Change the first paragraph of 10. 1.2.6, includiiig breaking the paragraph jilt U two separate paragraphs,
as indicated:
The MSK PHY 2450 MHz band uses channel page 7 with the channel numbers defined in Table 10-S and Table 10-8a. A total of 42 frequency channels numbered 15 to 56 on channel page 7 arc available in the band from 2400 MHz to 2483.5 MHz for the 250 kb/s data rate. A total of 16 frequency channels numbered 57 to 72 on channel page 7 are available for the 2000 kb’s data rate. Different subsets of these frequency channels are available in different regions of the world.
Compliant receivers operating at 250 kb/s shall implement all channels in Table 10-8, defaulting to channel 47 unless modified by higher layers. The multiple narrow channels for the narrowband MSK 2450 Mhz PRY arc specified in order to improve coexistence with other 2450 MHz services. Compliant receivers operating at the 2000 kb/s data rate shall implement all channels in Table 10-8a with no default channel. The selection of specific channels is out of the scope of this standard, being pcomwd by higher layers.
Change tile table title of Table 10—8 as indicated the table is not si,o.’,,), and insert tile new Table 1 0—8i after Table 10-8:
Table 1O-8—MSK 2450 MHz mandatory PHY channel frequencies for 250 kb/s data rate
18. MSK PHY 18.1 PPDU formats Change the first paragraph of 18.1 as indicated, and insert the following figures (Figure 18-0a and Figure 18-0b) after the first paragraph of 18.1: The MSK PHY shall use the PPDU formats described in 12.1, except that the Preamble field is 32 symbols (4octets) and the bits in each octet shall be“10101010.” In addition, when implementing the 2000 kb/s data rate. the PHR field is formatted either as ilustrated in Figure 18-0a or Figure 18-0b. depending on the value of the Extended PHR field defined in 18.1.2.
18.1.1 Frame length LSB field The frame length LSB field specifies the seven least significant bits of the frame length. The frame length is defined as the total number of octets contained in the PSDU (i.e., PHY payload). 18.1.2 Extended PHR field The Extended PHR field determines the presence of the frame length MSB field described in 18.1.3. When the Extended PHR field is set to zero, the PHR shall be formatted as shown in Figure 18-0a. When the Extended PHR field is set to one, the PHR shall be formatted as shown in Figure 18-0b. The value of the Extended PHR field shall be selected by the transmitting MAC in an implementation-dependent manner, consistent with the requirement that frames having a frame length greater than 127 octets shall have the Extended PHR field set to one. This field also indicates the length of the FCS, as described in 7.2. 10. Devices that implement the 2000 kb/s data rate shall be capable of supporting the reception of both FCS lengths.
IEEE Std 802.15.4t pdf download.