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Medium Access Control (MAC) and Physical Layer (PHY) - CISE

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4-June-07 P1901_PRO_016_r0<br />

4.4.2.2 Data token<br />

The Data Token has the following fields:<br />

Figure 41 Distributor Token Info Size = 0<br />

- Preamble – 32 bits. The preamble is equal to 0x5F73EEE2.<br />

- Type – 4 bits. Type shall be DATA (0)<br />

- Direction – 1 bit. See above.<br />

- Transmission in HURTO – 1 bit. Indicates whether the transmission from Token Transmitter to Destination<br />

Port is using HURTO or not.<br />

- Allow Channel Estimation Frame– 1 bit. From Master to Slave. If it is set to 1, the Slave receiving this<br />

token must send a Channel Estimation Frame. See 4.3.3 for more information.<br />

- Send Channel Estimation Frame next – 1 bit. From Slave to Master. The Slave is requesting to send a<br />

Channel Estimation Frame. See 4.3.3 for more information.<br />

Submission page 115 UPA-OPERA

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