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Unformatted text preview: sight of previous decisions. 1.5 DOCUMENT STRUCTURE This document is divided into five numbered sections and three annexes: – section 1 presents the purpose, scope, applicability and rationale of this Recommendation and lists the conventions, definitions, and references used throughout the Recommendation. – section 2 provides an overview of the TM Space Data Link Protocol. – section 3 defines the services provided by the protocol entity. – section 4 specifies the protocol data units and procedures employed by the protocol entity. – section 5 specifies the managed parameters used by the protocol entity. – – annex B provides a list of informative references. – 1.6 annex A lists all acronyms used within this document. annex C lists the changes from the older CCSDS Recommendation (reference [B3]). CONVENTIONS AND DEFINITIONS 1.6.1 DEFINITIONS 1.6.1.1 Definitions from the Open Systems Interconnection (OSI) Basic Reference Model This Recommendation makes use of a number of terms defined in reference [1]. The use of those terms in this Recommendation shall be understood in a generic sense; i.e., in the sense that those terms are generally applicable to any of a variety of technologies that provide for the exchange of information between real systems. Those terms are: a) blocking; b) connection; c) Data Link Layer; d) entity; e) flow control; CCSDS 132.0-B-1 Page 1-2 September 2003 CCSDS RECOMMENDATION FOR TM SPACE DATA LINK PROTOCOL f) Network Layer; g) peer entities; h) Physical Layer; i) protocol control information; j) protocol data unit; k) real system; l) segmenting; m) service; n) Service Access Point (SAP); o) SAP address; p) service data unit. 1.6.1.2 Definitions from OSI Service Definition Conventions This Recommendation makes use of a number of terms defined in reference [2]. The use of those terms in this Recommendation shall be understood in a generic sense; i.e., in the sense that those terms are generally applicable to any of a variety of technologies that provide for the exchange of...
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