BLOCKING READER: DESIGN AND IMPLEMENTATION OF A ...
BLOCKING READER: DESIGN AND IMPLEMENTATION OF A ...
BLOCKING READER: DESIGN AND IMPLEMENTATION OF A ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Table 4.9. QueryAdjust command [3]<br />
Command Session UpDn<br />
# of bits 4 2 3<br />
Description 1001 00:S0 110: Q=Q-1<br />
01:S1 000: No change to Q<br />
10:S2<br />
11:S3<br />
011: Q=Q-1<br />
Table 4.10. QueryRep command [3]<br />
Command Session<br />
# of bits 2 2<br />
Description 00 00:S0<br />
01:S1<br />
10:S2<br />
11:S3<br />
4.3.5.3 QueryAdjust (Mandatory)<br />
A QueryAdjust command is sent by the Reader to adjust the Q parameters of<br />
the inventory round only. It consist of the following bits as shown in the Table 4.9. A<br />
QueryAdjust is always prepended by a frame-sync. In response to this command the<br />
Tag shall send RN16 command. QueryAdjust command consist of command, session<br />
and UpDn. The UpDn determines if the Tag shall increment/decrement the Q or<br />
have the Q value to be same.<br />
4.3.5.4 QueryRep(mandatory)<br />
QueryRep command shall be implemented by the Tag and Reader to decrement<br />
the slot value. The Tag shall respond with RN16 if the Slot value is ’0’. Table 4.10<br />
shows the command bit of QueryRep.<br />
41