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AIR INTERFACE FOR FIXED BROADBAND WIRELESS ACCESS SYSTEMS

IEEE Std 802.16-2001

11.1.3 RNG-REQ message encodings

The encodings in Table 126 are specific to the RNG-REQ message (6.2.2.3.5).

Table 126—RNG-REQ message encodings

Name

Type

Length

Value

(1 byte)

(variable-length)

 

 

 

 

 

 

Requested Downlink Burst

1

1

DIUC of the downlink burst profile requested by the SS for

Profile

downlink traffic

 

 

 

 

 

 

SS MAC Address

2

6

The link-layer address of the SS

 

 

 

 

Ranging Anomalies

 

 

A parameter indicating a potential error condition detected by

 

 

 

the SS during the ranging process. Setting the bit associated

 

 

 

with a specific condition indicates that the condition exists at

 

3

1

the SS.

 

 

 

 

 

Bit #0 — SS already at maximum power.

 

 

 

Bit #1 — SS already at minimum power.

 

 

 

Bit #2 — Sum of commanded timing adjustments is too large.

 

 

 

 

Copyright © 2002 IEEE. All rights reserved.

277

IEEE Std 802.16-2001

LOCAL AND METROPOLITAN AREA NETWORKS—PART 16:

11.1.4 RNG-RSP message encodings

The encodings in Table 127 are specific to the RNG-RSP message (6.2.2.3.6).

Table 127—RNG-RSP message encodings

Name

Type

Length

Value

(1 byte)

(variable-length)

 

 

 

 

 

 

Timing Adjust

1

4

Tx timing offset adjustment (signed 32-bit, units of 1/4

 

 

 

symbols)

 

 

 

The time by which to offset frame transmission so that frames

 

 

 

arrive at the expected minislot time at the BS.

 

 

 

 

Power Level Adjust

2

1

Tx Power offset adjustment (signed 8-bit, 0.25 dB units)

 

 

 

Specifies the relative change in transmission power level that

 

 

 

the SS is to make in order that transmissions arrive at the BS at

 

 

 

the desired power.

 

 

 

 

Offset Frequency Adjust

3

4

Tx frequency offset adjustment (signed 32-bit, Hz units)

 

 

 

Specifies the relative change in transmission frequency that the

 

 

 

SS is to make in order to better match the BS. (This is

 

 

 

fine-frequency adjustment within a channel, not reassignment

 

 

 

to a different channel.)

 

 

 

 

Ranging Status

4

1

Used to indicate whether uplink Messages are received within

 

 

 

acceptable limits by BS.

 

 

 

1 = continue, 2 = abort, 3 = success, 4 = rerange

 

 

 

 

Downlink frequency over-

5

4

Center frequency, in kHz, of new downlink channel on which

ride

 

 

the SS is to redo initial ranging.

 

 

 

If this TLV is used, the Ranging Status value shall be set to 2.

 

 

 

 

Uplink channel ID override

6

1

The identifier of the uplink channel with which the SS is to

 

 

 

redo initial ranging (not used with PHYs without channelized

 

 

 

uplinks).

 

 

 

 

Downlink Operational

7

1

This parameter is sent in response to the RNG-REQ Requested

Burst Profile

 

 

Downlink Burst Profile parameter. It contains the least robust

 

 

 

DIUC that may be used by the BS for transmissions to the SS.

 

 

 

 

SS MAC Address

8

6

SS MAC Address in MAC-48 format

 

 

 

 

Basic CID

9

2

Basic CID assigned by BS at initial access.

 

 

 

 

Primary Management CID

11

2

Primary Management CID assigned by BS at initial access.

 

 

 

 

278

Copyright © 2002 IEEE. All rights reserved.

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