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IEEE Std 802.16-2001

LOCAL AND METROPOLITAN AREA NETWORKS—PART 16:

11.4.8 Service flow encodings

The following fields define the parameters associated with uplink/downlink scheduling for a service flow. It is somewhat complex in that it is composed from a number of encapsulated TLV fields.

Note that the encapsulated uplink and downlink flow classification configuration setting strings share the same subtype field numbering plan, because many of the subtype fields defined are valid for both types of configuration settings except service flow encodings.

Uplink encodings use the type 24. Downlink encodings use the type 25. Entries of the form [24/25] indicate the encoding can be applied to either an uplink or downlink service flow.

11.4.8.1 Service flow identifier

The Service Flow Identifier (SFID) is used by the BS as the primary reference of a service flow. Only the BS may issue a SFID. It uses this parameterization to issue SFIDs in BS-initiated DSA/DSC-Requests and in its DSA/DSC-Response to SS-initiated DSA/DSC-Requests. The SS specifies the SFID of a service flow using this parameter in a DSC-REQ message.

Type

Length

Value

Scope

 

 

 

 

[24/25].2

4

1 – 4 294 967 295

DSx-REQ

 

 

 

DSx-RSP

 

 

 

DSx-ACK

 

 

 

 

11.4.8.2 Connection identifier

The value of this field specifies the CID assigned by the BS to a service flow with a non-null AdmittedQosParamSet or ActiveQosParamSet. This is used in the bandwidth allocation map to assign uplink bandwidth. This field shall be present in BS-initiated DSA-REQ or DSC-REQ message related to establishing an admitted or active uplink service flow. This field shall also be present in DSA-RSP and DSC-RSP messages related to the successful establishment of an admitted or active uplink service flow.

Even though a service flow has been successfully admitted or activated (i.e., has an assigned CID) the SFID shall be used for subsequent DSx message signalling as it is the primary handle for a service flow. If a service flow is no longer admitted or active (via DSC-REQ) its CID may be reassigned by the BS.

Type

Length

Value

Scope

 

 

 

 

[24/25].3

2

CID

DSx-REQ

 

 

 

DSx-RSP

 

 

 

DSx-ACK

 

 

 

 

298

Copyright © 2002 IEEE. All rights reserved.

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