IEEE C80216m-09_0431
Project
IEEE 802.16 Broadband Wireless Access Working Group <http://ieee802.org/16>
Title
Change Request to IEEE 802.16m System Description Document (SDD),
Subsection 10.7 Convergence Sublayer
Date
Submitted
2009-02-27
Source(s)
Dr. Michael Gundlach
Nokia Siemens Networks
St.-Martin-Str. 76
81541 Munich, Germany
Re:
IEEE 802.16m System Description Document (SDD) [Draft]
2009-02-07: IEEE 802.16m-08/003r7
Abstract
Section 9 Convergence Sublayer is currently empty; Subsection 10.7 has the same title,
however, the current text is not sufficient yet. This CR proposes an appropriate text for a
combined subsection on Convergence Sublayer within the Section on MAC Layer. The coexistence of IPCS, GPCS, and Ethernet-CS is clarified.
Purpose
The proposed text shall be used as text in Subsection 10.7 Convergence Sublayer.
Voice:
E-mail:Michael.gundlach@nsn.com
Note: As proposed in another comment, the subsection number may be 10.1 instead.
Notice
Release
Patent
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Text for Section 10.7 Convergence Sublayer
in IEEE 802.16m System Description Document (SDD)
Michael Gundlach
Nokia Siemens Networks
10.7 Convergence Sublayer
The Convergence Sublayer (CS) is the top part of the MAC Layer. It is above the MAC Common Part Sublayer
(CPS). The CS is used to allow the transport of several different protocols (e.g. Ethernet, IPv4, IPv6) over the
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IEEE C80216m-09_0431
802.16 network. It adds a header or wraps the data in a header and trailer that contain information necessary to
provide the services. Typically, error control (forward error correction, see 14.4.3.2) and priority information
are added at this layer.
According to IEEE 802.16Rev2/D9, Section 5.3, the Generic Packet Convergence Sublayer (GPCS) is
upper-layer-protocol independent. It supports multiple protocols over the 802.16 Air Interface. The
classification is assumed to take place by packet parsing on layers above the CS, resulting in classification
parameters given to the GPCS SAP for “parameterized classification”. The GPCS does not define classification
rules for each kind of payload but relies on higher layer functionality outside the scope of IEEE 802.16 to
provide the assignment of packets to particular service flows.
For communication between an AMS and an ABS, only GPCS shall be used.
For communication between an AMS and a BS that has not implemented the protocol defined for
WirelessMAN-OFDMA Advance System, or between an ABS and an MS that has not implemented the
protocol defined for WirelessMAN-OFDMA Advance System, respectively, other CS signalling may be used,
such as IPCS or Ethernet-CS.
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