3.2.1.5.3.5 OUT Channel Recycling 2

The OUT channel recycling 2 protocol sequence recycles a virtual OUT channel. The name of this sequence is OUT_R2. This protocol sequence is very similar to protocol sequence OUT_R1. The two start identically, and while processing OUT_R1/A3 RTS PDU they diverge based on dynamic decisions made by the outbound proxy as specified in section 3.2.4.5.6. It has two PDU groups.

Group name	Meaning
A	PDUs that initiate and perform the virtual channel recycling
B	PDUs that complete the virtual channel recycling

The following diagram depicts the sequence of events in the OUT channel recycling 2 protocol.

Figure 21: OUT channel recycling 2 protocol sequence

The references for the PDUs used in this protocol sequence are as follows.

Diagram label	PDU name and reference section
OUT channel request	OUT Channel Request (section 2.1.2.1.2)
OUT channel response	OUT Channel Response (section 2.1.2.1.4)
A1	OUT_R2/A1 RTS PDU (section 2.2.4.34)
A2	OUT_R2/A2 RTS PDU (section 2.2.4.35)
A3	OUT_R2/A3 RTS PDU (section 2.2.4.36)
A4	OUT_R2/A4 RTS PDU (section 2.2.4.37)
A5	OUT_R2/A5 RTS PDU (section 2.2.4.38)
A6	OUT_R2/A6 RTS PDU (section 2.2.4.39)
A7	OUT_R2/A7 RTS PDU (section 2.2.4.40)
A8	OUT_R2/A8 RTS PDU (section 2.2.4.41)
B1	OUT_R2/B1 RTS PDU (section 2.2.4.42)
B3	OUT_R2/B3 RTS PDU (section 2.2.4.44)
C1	OUT_R2/C1 RTS PDU (section 2.2.4.45)

The processing rules for this protocol sequence are specified in sections 3.2.2 through 3.2.5 of this specification.

Note In an effort to improve readability, the establishments of TCP connections are not shown in the figure.