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AIR INTERFACE FOR FIXED BROADBAND WIRELESS ACCESS SYSTEMS

IEEE Std 802.16-2001

the length of the length field shall be one byte,

the msb of the length field shall be set to 0, and

the other 7 bits of the length field shall be used to indicate the actual length of the value field in bytes.

If the length of the value field is more than 127 bytes:

the length of the length field shall be one byte more than what is actually used to indicate the length of the value field in bytes,

the most significant bit (msb) of the first byte of the length field shall be set to 1,

the other 7 bits of the first byte of the length field shall be used to indicate the number of additional bytes of the length field (i.e., excluding the first byte), and

the remaining bytes (i.e., excluding the first byte) of the length field shall be used to indicate the actual length of the value field.

The following configuration settings shall be supported by all BSs and SSs which are compliant with this specification. MAC management messages that do not contain all required encodings or contain encoding(s) with invalid length(s) shall be silently discarded.

11.1 MAC management message encodings

11.1.1 UCD message encodings

The UCD message encodings are specific to the UCD message (see 6.2.2.3.3).

11.1.1.1 UCD channel encodings

The UCD channel encodings are provided in Table 122.

 

 

Table 122—UCD channel encodings

 

 

 

 

Name

Type

Length

Value

(1 byte)

(variable-length)

 

 

 

 

 

 

Uplink_Burst_Profile

1

 

May appear more than once; described below. The length is the number

 

of bytes in the overall object, including embedded TLV items.

 

 

 

 

 

 

 

Symbol Rate

2

2

Symbol rate, in increments of 10 kBaud.

 

 

 

 

Frequency

3

4

Uplink center frequency (kHz).

 

 

 

 

 

 

 

The time, expressed in PSs, between the end of an SS burst and the

 

 

 

beginning of the subsequent burst at the BS. The SS shall take this into

SS Transition Gap

7

1

account when determining the length of the burst. The SS Transition

 

 

 

Gap consumes the last n PS of the intervals allocated in the UL-MAP.

 

 

 

That is, UL-MAP entries include the time for a burst’s ramp down.

 

 

 

 

Roll-off factor

8

1

0=0.15, 1=0.25, 2=0.35

 

 

 

 

Power adjustment

9

1

0=Preserve Peak Power

rule

 

 

1=Preserve Mean Power

 

 

 

Describes the power adjustment rule when performing a transition

 

 

 

from one burst profile to another.

 

 

 

 

Contention-based

10

1

Number of UL-MAPs to receive before contention-based reservation is

Reservation Time-out

 

 

attempted again for the same connection.

 

 

 

 

Copyright © 2002 IEEE. All rights reserved.

273

IEEE Std 802.16-2001

LOCAL AND METROPOLITAN AREA NETWORKS—PART 16:

11.1.1.2 Uplink burst profile encodings for 10–66 GHz systems

The uplink burst profile encodings for 10–66 GHz systems are provided in Table 123.

Table 123—Uplink_Burst_Profile encodings

Name

Type

Length

 

Value

(1 byte)

 

(variable-length)

 

 

 

 

 

 

 

Modulation type

1

1

1=QPSK, 2=16-QAM, 3=64-QAM

 

 

 

 

 

 

 

The number of symbols in the preamble pattern. The preamble

Preamble length

4

1

consumes the first n PS of the intervals allocated in the UL-MAP.

That is, UL-MAP entries include the bandwidth for a burst’s

 

 

 

 

 

 

preamble.

 

 

 

 

 

 

 

 

1

= Reed-Solomon only

 

 

 

2

= Reed-Solomon + Inner (24,16) Block Convolutional Code

FEC code type

5

1

 

(BCC)

3

= Reed–Solomon + Inner (9,8) Parity Check Code

 

 

 

 

 

 

4

= Block Turbo Code (Optional)

 

 

 

5–255 = Reserved

 

 

 

 

RS information bytes

6

1

K=6–255

(K)

 

 

 

 

 

 

 

 

RS parity bytes (R)

7

1

R = 0–32 (error correction capability T = 0-16)

 

 

 

 

 

BCC code type

8

1

1

= (24,16)

2–255 = Reserved

 

 

 

 

 

 

 

 

 

 

 

1

= (64,57) Extended Hamming

BTC row code type

9

1

2

= (32,26) Extended Hamming

 

 

 

3–255 = Reserved.

 

 

 

 

 

BTC column code

 

 

1

= (64,57) Extended Hamming

10

1

2

= (32,26) Extended Hamming

type

 

 

3–255 = Reserved

 

 

 

 

 

 

 

 

BTC interleaving type

14

1

1

= No interleaver, 2 = Block Interleaving, 3–255 = Reserved.

 

 

 

 

Scramblerseed

15

2

The 15-bit seed value left-justified in the 2 byte field. Bit 15 is the

msb of the first byte, and the lsb of the second byte is not used.

 

 

 

 

 

 

 

 

Last codeword length

17

1

1

= fixed; 2 = shortened

 

 

 

 

 

274

Copyright © 2002 IEEE. All rights reserved.

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