DIS Data Dictionary - PDU Data

Created by JDBE at Ft. Huachuca, Arizona

Current standard: IEEE 1278.1


Service Request PDU

Size: 320
Description: A request for logistics shall be communicated by issuing a Service Request PDU. The Service Request PDU shall consist of the following fields:

a) PDU Header - This field shall contain data common to all DIS PDUs. The PDU Header shall be represented by the PDU Header Record (see 5.3.24).
b) Requesting Entity Identification - This field shall identify the entity that is requesting the service. This field shall be represented by an Entity Identifier Record (see 5.3.14).
c) Servicing Entity Identification - This field shall identify the entity that is able to provide the service requested. This field shall be represented by and Entity Identifier Record (see 5.3.14).
d) Service Type Requested - This field shall describe the type of service being requested. The field shall be represented by an 8-bit enumeration (see Section 6 in EBV-DOC).
e) Number of Supply Types - For a service of resupply, this field shall specify the number of different supplies being requested. If the service requested is not resupply, this field shall contain the value zero. This field shall be represented by an 8-bit unsigned iteger. The maximum number of Supply Quantity Records in a Service Request PDU is a function of the maximum PDU size specified in the Standard for Distributed Interactive Simulation - Communication Services and Profiles, and is defined as follows
n(max) = (Max PDU size - 224) / 96
n(max) = 144 for the current communication architecture standard.
f) Supplies - For a service of resupply, this field shall specify the type of supply and the amount of that supply for the number of supplies specified above. If the service requested is not resupply, this field shall not be present. This field shall be represented by a Supply Quantity Record (see 5.3.30).

The Service Request PDU is represented in Table 36.

PDU Components:

Item Name Bit Length Opt Opt Ctl Rpt Rpt Ctl
PDU Header Record 96
Requesting Entity Record 48
Servicing Entity ID Record 48
Service Type Requested Field 8
Number of Supply Types Field 8
Padding - 16bit Field 16
Supplies Record 96 Yes
For questions regarding the content of the DIS Data Dictionary,
please contact Jeff Wicks, jwicks@ist.ucf.edu

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Generated by the DIS Data Dictionary