Chapter 7 – Aloha-Based Protocol

Table 7.1 RFID standards and products

Figure 7.1 Reader and tags interactions

Figure 7.2 Pure Aloha with muting

Figure 7.3 Pure Aloha with slow down

Figure 7.4 Pure Aloha with fast mode

Figure 7.5 Slotted Aloha with early end

Figure 7.6 λ = 20, K = 5

Figure 7.7 Number of collision to read n tags

Figure 7.8 Number of idle slots encountered when reading n tags

Table 7.2 Optimal frame sizes for agiven tag range

Figure 7.9 (a) A CD frame precedes each jump frame.

Figure 7.9 (b) Collision detection using Manchester encoding

Table 7.3 EDFSA frame sizes

Figure 7.10 ResMon Frames

Figure 7.11

Figure 7.12 Reading delay of BFSA, DFSA, and EDFSA variants

Figure 7.13 Average number of collisions encountered when

reading n tags

Figure 7.14 Average number of idle slots encountered when reading n

tags