Project IEEE 802.16 Broadband Wireless Access Working <> Title Proposed Amendments to IEEE Std 802.16-2012 to Support <1.25 MHz Channels Date Submitted 2017-01-18 Source(s) Doug Gray, EPRI E-mail: dgray.tcs@gmail.com *<> Re: IEEE 802.16s GRIDMAN Task Group Discussions Abstract Pre-draft of proposed amendments to IEEE Std 802.16-2012 as amended by 802.16n, p, and q, (P80216Rev4_D0). This revision combines proposed modifications for both MAC and PHY layers into a single document and reflects edits resulting from GRIDMAN WG discussions of 17 Jan 2017 and 18 Jan 2017. Purpose This document is intended to facilitate the GRIDMAN Task Group discussions leading to a consensus on proposed amendments to IEEE Std 802.16 in support of channel BWs less than 1.25 MHz Notice This document does not represent the agreed views of the IEEE 802.16 Working Group or any of its subgroups. It represents only the views of the participants listed in the “Source(s)” field above. It is offered as a basis for discussion. It is not binding on the contributor(s), who reserve(s) the right to add, amend or withdraw material contained herein. Copyright Policy The contributors are familiar with the IEEE-SA Copyright Policy <http://standards.ieee.org/IPR/copyrightpolicy.html>. Patent Policy The contributors are familiar with the IEEE-SA Patent Policy and Procedures: <> and <>. Further information is located at <> and <>.
IEEE Standard for Air Interface for Broadband Wireless Access Systems—Proposed Proposed Amendment 802.16s for GRIDMAN WG Discussions: Support for Channel Bandwidths Less Than 1.25 MHz Reference: P80216Rev4_D0 3. Definitions Insert the following new definition: Band AMC: aka ‘adjacent subcarrier permutation’ is a permutation scheme in which the entire channel is split into groups of nine contiguous subcarriers. Each group, defined as a bin, is comprised of eight data subcarriers and one pilot subcarrier. 6.3.2.1 MAC header formats Change the paragraph as indicated: The MAC header formats are defined in Table 6-1 except for the MAC header formats for DL MAP and UL MAP MAC messages for channel bandwidth less than 1.25 MHz in which case the MAC header formats are defined in paragraph 6.3.2.1.1.2. Insert the following subclause: 6.3.2.1.1.2 MAC header format for DL MAP and UL MAP MAC messages when the channel bandwidth is less than 1.25 MHz The header of the DLMAP MAC message shall be of the format defined in Table 6-6. The DLMAP is always the first burst in the DLSF so it can be identified as DLMAP directly. CID indication is therefore not needed at the receiver side .The modified GMAC header consists of 1 byte length field and 1 byte for HCS field. Insert Table 6-6 as indicated: Table 6-6 - Modified DLMAP header for channel bandwidths less than 1.25 MHz
DIUC Usage 0–12 Different burst profiles including QPSK ½ repetition 2 13 Reserved 14 Extended-2 DIUC IE 15 Extended DIUC Change 8-123 as indicated: 8-123—OFDMA STC DL Zone IE format Syntax Size Notes (bit) STC_DL_Zone_IE() { — — Extended DIUC 4 STC/DL_Zone_SWITCH = 0x1 Length 4 Length = 0x4 OFDMA symbol offset 8 Denotes the start of the zone (counting from the frame preamble and starting from 0) Permutation 2 0b00: PUSC permutation 0b01: FUSC permutation 0b10: Optional FUSC permutation 0b11: Adjacent subcarrier permutation Use All SC 1 0: Do not use all subchannels
8.4.14.1.1 Receiver sensitivity Change Table 8-87 as indicated: Table 8-87-Receiver SNR assumption (BER = 10-6) Modulation Coding Rate Receiver SNR (dB) QPSK 1/2 5 3/4 8 1/2 10.5 3/4 14 64QAM 1/2 16 2/3 18 3/4 20 5/6 22 Insert new subclause 12.9 as follows: 12.9 WirelessMAN OFDMA TDD Sub-1.25 MHz Channel Bandwidths This subclause defines system requirements for systems operating with channel bandwidths less than 1.25 MHz. To maintain sufficient subcarrier spacing in support of moderate mobility requirements and intercarrier interference requirements, Channel Subgroups 1, 2, and 3 shall use only a subset of the available subchannels. Groups 1 and 2 shall use Band AMC 1x6 permutation (1 bin x 6 symbols). Group 3 and Group 4 shall use Band AMC and either 2x3 (2 bins x 3 symbols) or 1x6 permutation. 12-41a—Profile definitions 0.10 MHz to 0.15 MHz BW Channel Subgroup 1 Identifier Channel Subgroup 1 Description OFDMA_ProfSM1 1/4-DL Preamble-Band AMC-27 subcarrier & Code set 3 for initial & periodic ranging OFDMA_ProfS1 WirelessMAN-OFDMA 0.10 MHz channel basic PHY TDD profile, Band AMC 1x6 OFDMA_ProfS2 WirelessMAN-OFDMA 0.15 MHz channel basic PHY TDD profile, Band AMC 1x6
BER performance threshold, BER = 10-6 (using all available subchannels) QPSK-1/2 QPSK-3/4 16-QAM-1/2 16-QAM-3/4 64-QAM-2/3 64-QAM-3/4 64-QAM-5/6 (if supported) For channel BWs in this subgroup add 10Log(ChannelBW in MHz/0.100) Add to sensitivity if using less than allowed number of subchannels 10Log(Used subchannels/Allowed subchannels) ≤-106.3 dBm ≤-104.3 dBm ≤-101.8 dBm ≤ -98.3 dBm ≤ -96.3 dBm ≤ -94.3 dBm ≤ -92.3 dBm Reference frequency tolerance BS SS-to-BS synchronization tolerance ≤ ± 1 x 10-6 ≤ 2 Hz duration code set {7,8,9,11} Spectrum mask Local regulation Table 12-44b—Minimum performance requirements for subgroup 2 profiles Capability Minimum performance Channel bandwidth 0.200 MHz reference Operation mode Licensed bands BER performance threshold, BER = 10-6 (using all available subchannels) QPSK-1/2 QPSK-3/4 16-QAM-1/2 16-QAM-3/4 64-QAM-2/3 64-QAM-3/4 64-QAM-5/6 (if supported) For other channel BWs in this subgroup add 10Log(ChannelBW in MHz/0.200) Add to sensitivity if less than allowed number of subchannels 10Log(Used subchannels/Allowed subchannels) ≤-103.3 dBm ≤-101.3 dBm ≤ -98.8 dBm ≤ -95.3 dBm ≤ -93.3 dBm ≤ -91.3 dBm ≤ -89.3 dBm Reference frequency tolerance BS SS-to-BS synchronization tolerance ≤ ± 1 x 10-6 ≤ 2 Hz duration code set {6,8,9,11} Spectrum mask regulation 12-44c—Minimum performance requirements for subgroup 3 profiles Capability Minimum performance Channel bandwidth 0.350 MHz reference Operation mode Licensed