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IEEE Std 802.16-2001

LOCAL AND METROPOLITAN AREA NETWORKS—PART 16:

The TFTP-CPLT shall include the following parameters encoded as TLV tuples:

HMAC Tuple (see 11.4.10)

The HMAC Tuple shall be the last attribute in the message.

6.2.2.3.29 Config File TFTP Complete Response (TFTP-RSP) message

The Config File TFTP-RSP Message shall be generated by the BS in response to a TFTP-CPLT message from the SS. The format of the TFTP-RSP shall be as shown in Table 56.

Table 56—Config File TFTP-RSP message format

Syntax

Size

Notes

TFTP-RSP_Message_Format() {

Management Message Type = 32

8 bits

}

Parameters shall be as follows:

CID (in the Generic MAC Header)

SS’s Primary Management CID.

6.2.3 Construction and transmission of MAC PDUs

The construction of a MAC PDU is illustrated in Figure 25.

6.2.3.1 Conventions

Messages are always transmitted in the order: Most Significant Byte first, with the Most Significant Bit first in each byte.

78

Copyright © 2002 IEEE. All rights reserved.

AIR INTERFACE FOR FIXED BROADBAND WIRELESS ACCESS SYSTEMS

IEEE Std 802.16-2001

Start

 

Yes

Pack

No

 

 

 

 

 

SDUs?

 

 

 

 

Frag-

No

 

 

 

Frag-

 

ment/SDU

 

 

 

ment in

 

 

 

 

 

 

fits?

 

 

 

 

queue?

 

(NOTE)

 

 

 

 

 

 

Yes

 

 

 

 

No

 

 

 

 

 

 

 

Add Packing

 

Fragment SDU;

 

No

Frag-

 

Subheader;

 

add Packing

 

 

 

 

ment

 

add SDU or

 

Subheader;

 

 

 

 

 

 

needed?

 

SDU fragment

 

add fragment

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

Yes

Capacity

 

 

 

Add Fragmenta-

 

 

 

 

 

tion Subheader

 

for more

 

 

 

 

 

 

Add SDU to

& SDU fragment

 

SDUs?

 

 

 

 

to payload

 

 

 

payload

 

 

No

 

 

 

 

 

NOTE: “Fragment/SDU fits?” means: “Does the fragment left over from the last time, or the next SDU if no fragment was left over, fit in the available bandwidth?”

Yes

Add Fragmenta-

tion Subheader

Frag-

No

ment

 

 

 

 

 

needed?

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fragment the

 

Add fragmented

SDU fragment &

 

SDU fragment

add to payload

 

to payload

 

 

 

 

 

 

 

 

 

 

 

 

Prepend other subheaders

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

Calculate

 

 

Encrypt

 

 

and append

 

 

 

payload

 

 

CRC

 

 

 

?

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Apply Generic

 

 

 

 

 

 

 

 

 

 

 

 

 

Encrypt

 

 

 

MAC Header

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Concatenate

 

 

 

 

 

 

 

 

 

 

 

 

 

Include Yes

 

 

PDU to up/down-

 

 

 

 

 

link burst

 

 

 

CRC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

?

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 25—Construction of a MAC PDU

6.2.3.2 Concatenation

Multiple MAC PDUs may be concatenated into a single transmission in either the uplink or downlink directions. Figure 26 illustrates this concept for an uplink burst transmission. Since each MAC PDU is identified by a unique CID, the receiving MAC entity is able to present the MAC SDU (after reassembling the MAC SDU from one or more received MAC PDUs) to the correct instance of the MAC SAP. MAC Management messages, user data, and bandwidth request MAC PDUs may be concatenated into the same transmission.

Copyright © 2002 IEEE. All rights reserved.

79

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