nato unclassified - Ham-pages ... No indexes at this level
nato unclassified - Ham-pages ... No indexes at this level
nato unclassified - Ham-pages ... No indexes at this level
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NATO UNCLASSIFIED<br />
STANAG 5066: PROFILE FOR MARITIME HF DATA COMMUNICATION<br />
V1.0.2<br />
Type :<br />
“1” = PHYSICAL LINK REQUEST<br />
Encoding :<br />
TYPE<br />
(=1)<br />
Description :<br />
This C_PDU is transmitted by the peer sublayer which requests the making of the<br />
Physical Link. This C_PDU consists only of one field: Type. When <strong>this</strong> C_PDU is<br />
transmitted the local <strong>No</strong>de is not linked to another <strong>No</strong>de and therefore the ARQ<br />
transmission mode is not supported by the D<strong>at</strong>a Transfer Sublayer. This C_PDU shall<br />
be sent by the D<strong>at</strong>a Transfer Sublayer using type 8 D_PDUs. The peer sublayer<br />
which receives <strong>this</strong> C_PDU must respond with either a type 2 or type 3 C_PDU<br />
described next.<br />
Type :<br />
“2” = PHYSICAL LINK ACCEPTED<br />
Encoding :<br />
TYPE<br />
(=2)<br />
Description :<br />
This C_PDU is transmitted by a peer sublayer as a positive response to the reception<br />
of a type 1 C_PDU (PHYSICAL LINK REQUEST). This C_PDU consists only of<br />
one field, i.e. Type. When <strong>this</strong> C_PDU is transmitted the local <strong>No</strong>de is not linked to<br />
another <strong>No</strong>de and therefore the ARQ transmission mode is not supported by the D<strong>at</strong>a<br />
Transfer Sublayer. This C_PDU shall be sent by the D<strong>at</strong>a Transfer Sublayer using<br />
type 8 D_PDUs.<br />
Type :<br />
“3” = PHYSICAL LINK REJECTED<br />
Encoding :<br />
TYPE<br />
(=3)<br />
RESERVED<br />
Description :<br />
This C_PDU is transmitted by a peer sublayer as a neg<strong>at</strong>ive response to the reception<br />
of a type 1 C_PDU (PHYSICAL LINK REQUEST). This C_PDU consists of two<br />
fields: Type and Reason. The reserved field will be used in the future to identify the<br />
reason for which the Physical Link Request is being rejected. . Until the reasons and<br />
codes are defined, the reserved bits shall be set to 0. Possible values include:<br />
Broadcast-Only-<strong>No</strong>de, Higher-Priority-Link-Request-Pending, etc. 6 When <strong>this</strong><br />
C_PDU is transmitted the local <strong>No</strong>de is not linked to another <strong>No</strong>de and therefore the<br />
6 “Link busy” is not included in the list of possible reasons for rejecting node’s request to establish a<br />
link since <strong>this</strong> function is provided by the WARNING frame type of the D<strong>at</strong>a Transfer Sublayer. See<br />
Section 3.3.6.<br />
NATO UNCLASSIFIED<br />
3
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