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AIR INTERFACE FOR FIXED BROADBAND WIRELESS ACCESS SYSTEMS

IEEE Std 802.16-2001

indicated by the PHSS and according to the PHSM. If this TLV is not included in a service flow definition, or is included with a value of 0 bytes, then PHS is disabled. A non-zero value indicates PHS is enabled.

11.4.9.3.7.5 Payload Header Suppression Verification (PHSV)

The value of this field indicates to the sending entity whether or not the packet header contents are to be verified prior to performing suppression. If PHSV is enabled, the sender shall compare the bytes in the packet header with the bytes in the PHSF that are to be suppressed as indicated by the PHSM.

Type

Length

 

Value

 

 

 

 

[24/25].100.12.5

1

0

= verify

 

 

1

= don’t verify

 

 

 

 

If this TLV is not included, the default is to verify. Only the sender shall verify suppressed bytes. If verification fails, the Payload Header shall NOT be suppressed.

11.4.9.3.7.6 Vendor-specific PHS parameters

This allows vendors to encode vendor-specific PHS parameters. The Vendor ID shall be the first TLV embedded inside Vendo-specific PHS Parameters. If the first TLV inside Vendor-specific PHS Parameters is not a Vendor ID, then the TLV shall be discarded.

Type

Length

Value

 

 

 

[24/25].100.12.255

n

 

 

 

11.4.9.4 ATM CS Encodings for Configuration and MAC-Layer Messaging

The following TLV encodings shall be used in the configuration file, in SS registration requests (when applicable), and in Dynamic Service Messages (when applicable). All ATM specific TLVs are prefixed to begin with a Type value of 99.2.

11.4.9.4.1 ATM switching encoding

This field defines the switching methodology for the service. If the field = 0, at least one VPI/VCI Classifier pair shall be defined for classifying the service. If the field = 1, exactly one VPI Classifier and zero or one VCI Classifier shall be specified for classifying the service. If the field = 2, exactly one VPI Classifier and one VCI Classifier shall be defined for classifying the service. If the field = 0, PHS is not allowed and the SDU size TLV shall equal 52. If the field = 1 and PHS is on for the service, the SDU size TLV shall equal 51; otherwise it shall be set equal to 52. If the field = 2 and PHS is on for the service, the SDU size TLV shall equal 49; otherwise it shall be set equal to 52.

Type

Length

 

Value

 

 

 

 

[24/25].99.0

1

0

= no switching methodology applied

 

 

1

= VP switching

 

 

2

= VC switching

 

 

 

 

Copyright © 2002 IEEE. All rights reserved.

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