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IEEE Std 802.16-2001

LOCAL AND METROPOLITAN AREA NETWORKS—PART 16:

To provide flexibility, the message parameters following the Response field shall be encoded in a TLV format.

Table 50—SS SBC-RSP message format

Syntax

Size

Notes

 

 

 

SBC-RSP_Message_Format() {

 

 

 

 

 

Management Message Type = 27

8 bits

 

 

 

 

Confirmation Code

8 bits

 

 

 

 

TLV Encoded Attributes

Variable

TLV specific

 

 

 

}

 

 

 

 

 

A BS shall generate SS SBC-RSPs in the form shown in Table 50, including both of the following parameters:

CID (in the MAC Header)

CID from corresponding SBC-REQ to which this response refers (this acts as a transaction identifier).

The following parameters shall be included in the SBC-RSP if found in the SS SBC-REQ:

Physical Parameters Supported (see 11.4.1.2)

Bandwidth Allocation Support (see 11.4.1.6)

The BS response to the subset of SS capabilities present in the SBC-REQ message. The BS responds to the SS capabilities to indicate whether they may be used. If the BS does not recognize an SS capability, it shall return this as “off” in the SBC-RSP.

Only capabilities set to “on” in the SBC-REQ may be set “on” in the REG-RSP, as this is the handshake indicating that they have been successfully negotiated.

6.2.2.3.25 Clock Comparison (CLK-CMP) message

In network systems with service flows carrying information that requires the SSs to reconstruct their network clock signals (e.g., DS1 and DS3), CLK-CMP messages shall be periodically broadcast by the BS.

74

Copyright © 2002 IEEE. All rights reserved.

AIR INTERFACE FOR FIXED BROADBAND WIRELESS ACCESS SYSTEMS

IEEE Std 802.16-2001

If provisioned to do so, the BS shall generate one CLK-CMP message at every periodic interval defined in Table 118 according to the format shown in Table 51.

Table 51—CLK-CMP message format

Syntax

Size

Notes

 

 

 

CLK-CMP_Message_Format() {

 

 

 

 

 

Management Message Type = 28

8 bits

 

 

 

 

Clock Count n

8 bits

 

 

 

 

for (i = 1; i <= n; i++) {

 

For each clock signal 1 through n

 

 

 

Clock ID[i]

8 bits

 

 

 

 

Sequence Number[i]

8 bits

 

 

 

 

Comparison Value[i]

8 bits

 

 

 

 

}

 

 

 

 

 

}

 

 

 

 

 

CLK-CMP messages shall include the following parameters where Clock ID, Sequence Number, and Clock Comparison Value (CCV) shall be repeated for each clock signal:

Clock Count

This 8-bit value shall be the number of CCVs included in the CLK-CMP message.

Clock ID

This 8-bit value shall be the unique identifier for each clock signal from which the CCVs are generated by the BS.

Sequence Number

This 8-bit value shall be incremented by one (modulo the field size, 256) by the BS whenever a new CLK-CMP message is generated. This parameter is used to detect packet losses.

Clock Comparison Value

This 8-bit value shall be the difference (modulo the field size, 256) between the following two reference clock signals: (1) a 10 MHz reference clock locked to the symbol clock of the airlink (such as a GPS reference used to generate the symbol clock), and (2) an 8.192 MHz reference clock locked to the network clock.

6.2.2.3.26 De/Re-register Command (DREG-CMD) message

The DREG-CMD Message shall be transmitted by the BS on an SS’s Basic CID to force the SS to change its access state. Upon receiving a DREG-CMD, the SS shall take the action indicated by the action code.

Copyright © 2002 IEEE. All rights reserved.

75

IEEE Std 802.16-2001

LOCAL AND METROPOLITAN AREA NETWORKS—PART 16:

The MAC Management Message type for this message is given in Table 13. The format of the message is shown in Table 52.

Table 52—DREG-CMD message format

Syntax

Size

Notes

 

 

 

DREG-CMD_Message_Format() {

 

 

 

 

 

Management Message Type = 29

8 bits

 

 

 

 

Action Code

8 bits

 

 

 

 

TLV encoded parameters

variable

 

 

 

 

}

 

 

 

 

 

The Action Code values and the corresponding actions are specified in Table 53.

 

Table 53—Action Codes and actions

 

 

Action Code

Action

 

 

0x00

SS shall leave the current channel and attempt to access another

 

channel.

 

 

0x01

SS shall listen to the current channel but shall not transmit until an

 

RES-CMD message is received.

 

 

0x02

SS shall listen to the current channel but only transmit on the Basic,

 

Primary Management, and Secondary Management Connections.

 

 

0x03

SS shall return to normal operation and may transmit on any of its

 

active connections.

 

 

0x04-0xFF

reserved

 

 

The DREG-CMD 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.

6.2.2.3.27 DSx Received (DSX-RVD) message

The Dynamic Service Message Received message shall be generated by the BS in response to an SS-initiated DSx-REQ to inform the SS that the BS has received the DSx-REQ message in a more timely manner than provided by the DSx-RSP message, which shall be transmitted only after the DSx-REQ is authenticated. The format of the DSX-RVD shall be as shown in Table 54.

76

Copyright © 2002 IEEE. All rights reserved.

AIR INTERFACE FOR FIXED BROADBAND WIRELESS ACCESS SYSTEMS

IEEE Std 802.16-2001

Table 54—DSX-RVD message format

Syntax

Size

Notes

 

 

 

DSX-RVD_Message_Format() {

 

 

 

 

 

Management Message Type = 30

8 bits

 

 

 

 

Transaction ID

16 bits

 

 

 

 

Confirmation Code

8 bits

 

 

 

 

}

 

 

 

 

 

Parameters shall be as follows:

CID (in the Generic MAC Header)

SS’s Primary Management CID.

Transaction ID

Transaction ID from corresponding DSA-REQ.

Confirmation Code (see 11.4.12)

The appropriate Confirmation Code indicating the integrity of the corresponding DSx-REQ.

6.2.2.3.28 Config File TFTP Complete (TFTP-CPLT) message

The Config File TFTP-CPLT Message shall be generated by the SS when it has successfully retrieved its configuration file from the provisioning server. The format of the TFTP-CPLT shall be as shown in Table 55.

Table 55—TFTP-CPLT message format

Syntax

Size

Notes

 

 

 

TFTP-CPLT_Message_Format() {

 

 

 

 

 

Management Message Type = 31

8 bits

 

 

 

 

TLV encoded information

variable

 

 

 

 

}

 

 

 

 

 

Parameters shall be as follows:

CID (in the Generic MAC Header)

SS’s Primary Management CID.

Copyright © 2002 IEEE. All rights reserved.

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