IEEE 802.11af标准：2013年TVWS无线LAN amendment for MAC & PHY规格

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IEEE Std 802.11af™-2013 是一个重要的 IEEE 标准，它扩展了 IEEE 802.11 系列规范，专注于电视白色空间 (TVWS) 的无线局域网 (WLAN) 操作。这份标准是在 IEEE 802.11™-2012 的基础上进行修订的，后者定义了基础的无线局域网技术，包括第 11 部分，即 MAC（介质访问控制）和 PHY（物理层）规格。IEEE Std 802.11af 的修订涵盖了多个先前的标准，如 IEEE Std 802.11ae™-2012、IEEE Std 802.11aa™-2012、IEEE Std 802.11ad™-2012 和 IEEE Std 802.11ac™-2013，这些都致力于提升无线通信的性能和效率。该标准的主要目标是通过利用电视白色空间频谱，即广播电视频段未被使用的部分，来增加无线网络的可用带宽。这使得 W-Fi 设备能够在这些频段上提供更高的数据传输速率，尤其是在拥挤的城市环境中，能够缓解传统 W-Fi 网络的容量压力。对于制造商来说，IEEE 802.11af 提供了关于如何设计和实现支持 TVWS 功能的设备的详细指导，包括技术要求、频谱管理和安全措施。此外，IEEE Std 802.11af 不仅关注技术规范，还包含了对操作限制的说明，例如授权许可使用范围，如 ULAKBIMUASL-TOBB Ekonomive Teknoloji Unv. 的用户在特定时间下载文档时的权限规定。这些限制通常与版权、安全和合规性相关，确保技术的合法和负责任的应用。 IEEE Std 802.11af™-2013 是一项关键的技术进步，它扩展了无线网络的潜力，促进了在电视白色空间环境下高效、大容量的数据传输，对于无线通信产业的发展具有重要意义。对于任何关注 Wi-Fi 技术升级和未来网络架构的人来说，理解和遵循这个标准都是至关重要的。

10.43.5.2 CSM requesting STA................................................................................. 76

10.43.5.3 CSM responding STA................................................................................ 76

10.43.6 Contact verification signal (CVS).............................................................................. 77

10.43.7 Network channel control (NCC) procedures ............................................................. 77

10.43.7.1 Introduction................................................................................................ 77

10.43.7.2 NCC requesting STA ................................................................................. 78

10.43.7.3 NCC responding STA................................................................................ 79

10.43.8 Reduced neighbor report............................................................................................ 79

10.43.9 White space map (WSM)........................................................................................... 80

23. Television Very High Throughput (TVHT) PHY specification........................................................ 82

23.1 Introduction.............................................................................................................................. 82

23.1.1 Introduction to the TVHT PHY................................................................................. 82

23.1.2 Scope.......................................................................................................................... 83

23.1.3 TVHT PHY functions ................................................................................................ 84

23.1.3.1 General....................................................................................................... 84

23.1.3.2 PHY management entity (PLME).............................................................. 84

23.1.3.3 Service specification method ..................................................................... 84

23.1.4 PPDU formats ............................................................................................................ 84

23.2 TVHT PHY service interface .................................................................................................. 84

23.2.1 Introduction................................................................................................................ 84

23.2.2 TXVECTOR and RXVECTOR parameters .............................................................. 84

23.2.3 Effects of CH_BANDWIDTH parameter on PPDU format...................................... 91

23.2.4 Support for NON_HT and HT formats...................................................................... 92

23.3 TVHT PHY sublayer ............................................................................................................... 96

23.3.1 Introduction................................................................................................................ 96

23.3.2 VHT PPDU format in TVWS bands.......................................................................... 96

23.3.3 Transmitter block diagram......................................................................................... 96

23.3.4 Overview of the PPDU encoding process.................................................................. 98

23.3.4.1 General....................................................................................................... 98

23.3.4.2 Construction of L-STF............................................................................... 98

23.3.4.3 Construction of the L-LTF......................................................................... 98

23.3.4.4 Construction of L-SIG ............................................................................... 99

23.3.4.5 Construction of TVHT-SIG-A................................................................... 99

23.3.4.6 Construction of TVHT-STF....................................................................... 99

23.3.4.7 Construction of TVHT-LTF ...................................................................... 99

23.3.4.8 Construction of TVHT-SIG-B ................................................................... 99

23.3.4.9 Construction of the Data field in an SU PPDU ....................................... 100

23.3.4.10 Construction of the Data field in an MU PPDU ...................................... 100

23.3.5 Modulation and coding scheme (MCS)................................................................... 101

23.3.6 Timing-related parameters....................................................................................... 101

23.3.7 Mathematical description of signals ........................................................................ 102

23.3.8 TVHT preamble....................................................................................................... 106

23.3.8.1 Introduction.............................................................................................. 106

23.3.8.2 Non-TVHT portion of VHT format preamble ......................................... 106

23.3.8.3 TVHT portion of VHT format preamble ................................................. 107

23.3.9 Transmission of NON_HT and HT PPDUs with multiple antennas ....................... 109

23.3.9.1 Transmission of NON_HT PPDUs with more than one antenna ............ 109

23.3.9.2 Transmission of HT format PPDUs with more than four antennas ......... 109

23.3.10 Data field.................................................................................................................. 109

23.3.10.1 General..................................................................................................... 109

23.3.10.2 SERVICE field ........................................................................................ 109

23.3.10.3 CRC calculation for TVHT-SIG-B.......................................................... 109

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23.3.10.4 Scrambler ................................................................................................. 109

23.3.10.5 Coding...................................................................................................... 109

23.3.10.6 Stream parser ........................................................................................... 110

23.3.10.7 Segment parser......................................................................................... 110

23.3.10.8 BCC interleaver ....................................................................................... 110

23.3.10.9 Constellation mapping ............................................................................. 110

23.3.10.10 Pilot subcarriers ....................................................................................... 111

23.3.10.11 OFDM modulation transmission in VHT format .................................... 111

23.3.10.12 Non-HT duplicate transmission ............................................................... 112

23.3.11 SU-MIMO and MU-MIMO Beamforming.............................................................. 112

23.3.11.1 General..................................................................................................... 112

23.3.11.2 Beamforming Feedback Matrix V ........................................................... 113

23.3.11.3 Group ID .................................................................................................. 113

23.3.12 TVHT preamble format for sounding PPDUs ......................................................... 113

23.3.13 Regulatory requirements.......................................................................................... 113

23.3.14 Channelization ......................................................................................................... 113

23.3.15 Transmit RF delay ................................................................................................... 115

23.3.16 Slot time................................................................................................................... 115

23.3.17 Transmit and receive port impedance...................................................................... 115

23.3.18 PMD transmit specification ..................................................................................... 115

23.3.18.1 Transmit spectrum mask.......................................................................... 115

23.3.18.2 Spectral flatness ....................................................................................... 116

23.3.18.3 Transmit center frequency and symbol clock frequency tolerance ......... 118

23.3.18.4 Modulation accuracy................................................................................ 118

23.3.18.5 Time of Departure accuracy .................................................................... 119

23.3.19 TVHT receiver specification ................................................................................... 119

23.3.19.1 General..................................................................................................... 119

23.3.19.2 Receiver minimum input sensitivity ........................................................ 119

23.3.19.3 Adjacent channel rejection....................................................................... 120

23.3.19.4 Nonadjacent channel rejection................................................................. 120

23.3.19.5 Receiver maximum input level ................................................................ 121

23.3.19.6 CCA sensitivity........................................................................................ 121

23.3.19.7 RSSI ......................................................................................................... 122

23.3.20 PLCP transmit procedure......................................................................................... 123

23.3.21 PLCP receive procedure .......................................................................................... 123

23.4 TVHT PLME ......................................................................................................................... 123

23.4.1 PLME_SAP sublayer management primitives ........................................................ 123

23.4.2 PHY MIB................................................................................................................. 123

23.4.3 TXTIME and PSDU_LENGTH calculation............................................................ 123

23.4.4 PHY characteristics.................................................................................................. 123

23.5 Parameters for TVHT MCSs ................................................................................................. 124

Annex B (normative) Protocol Implementation Conformance Statement (PICS) proforma....................... 131

B.2 Abbreviations and special symbols.................................................................................. 131

B.2.2 General abbreviations for Item and Support columns........................................ 131

B.4 PICS proforma—IEEE Std. 802.11-2012........................................................................ 131

B.4.4.1 MAC protocol capabilities .................................................................. 132

B.4.4.2 MAC frames........................................................................................ 132

B.4.12 Spectrum management extensions ..................................................................... 133

B.4.14 QoS base functionality ....................................................................................... 135

B.4.18 DSE functions .................................................................................................... 135

B.4.19.1 HT MAC features................................................................................ 138

B.4.21 WNM extensions................................................................................................ 139

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B.4.25 RobustAVT extensions ...................................................................................... 140

B.4.28 TVWS functions................................................................................................. 140

B.4.28.1 TVHT MAC features .......................................................................... 141

B.4.28.2 TVHT PHY features ........................................................................... 143

Annex C (normative) ASN.1 encoding of the MAC and PHY MIB........................................................... 146

C.3 MIB Detail ....................................................................................................................... 146

Annex D (normative) Regulatory references............................................................................................... 170

D.1 External regulatory references ......................................................................................... 170

Annex E (normative) Country elements and operating classes ................................................................... 171

E.1 Country information and operating classes ..................................................................... 171

E.2 Band specific operating requirements.............................................................................. 171

E.2.5 TVWS band in the United States and Canada (54 MHz to 698 MHz) .............. 171

E.2.6 TVWS band in Europe ....................................................................................... 174

Annex H (normative) Usage of Ethertype 89-0d......................................................................................... 175

Annex T (informative) Location and Time Difference accuracy test.......................................................... 176

T.2 Time Difference of Departure accuracy test.................................................................... 176

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Tables

Table 4-1—GDD mechanisms and timescales .............................................................................................. 11

Table 7-5—The channel-list parameter elements.......................................................................................... 33

Table 8-13b—MFB subfield in the VHT variant HT Control field .............................................................. 35

Table 8-14b—Device Class field definition .................................................................................................. 36

Table 8-14a—General TLV format ............................................................................................................... 36

Table 8-14d—Device Location Information field definition ........................................................................37

Table 8-14e—Channel Schedule Descriptor Tuple attribute definition ........................................................ 37

Table 8-14c—Device Identification Information field definition ................................................................. 37

Table 8-14f—Channel Schedule Descriptor Value fields ............................................................................. 38

Table 8-14h—WSM Information Value fields .............................................................................................. 39

Table 8-14g—WSM information values ....................................................................................................... 39

Table 8-20—Beacon frame body................................................................................................................... 40

Table 8-26—Probe Request frame body ....................................................................................................... 40

Table 8-27—Probe Response frame body ..................................................................................................... 41

Table 8-37—Status codes .............................................................................................................................. 41

Table 8-53k—Subfield values of the Operating Mode field .........................................................................44

Table 8-53n—Channel Schedule Management Mode field values ............................................................... 45

Table 8-53m—Reason Result Code field values........................................................................................... 45

Table 8-54—Element IDs.............................................................................................................................. 47

Table 8-53o—WSM Type definition............................................................................................................. 47

Table 8-103—Capabilities field..................................................................................................................... 48

Table 8-105—Default EDCA Parameter Set element parameter values if dot11OCBActivated is false ..... 48

Table 8-175—Advertisement protocol ID definitions................................................................................... 49

Table 8-183v—Subfields of the VHT Capabilities Info field .......................................................................50

Table 8-183aa—TVHT Operation Information subfields ............................................................................. 54

Table 8-190.a1—RLQP-element definitions ................................................................................................. 55

Table 8-190.a2—Reason Result Code field values ....................................................................................... 56

Table 8-190.a3—Reason Result Code field values ....................................................................................... 58

Table 8-210—Public Action field values ...................................................................................................... 59

Table 8-228—Public Action field values defined for Protected Dual of Public Action frames.................... 64

Table 10-20—TVHT BSS operating channel width...................................................................................... 69

Table 23-1—TXVECTOR and RXVECTOR parameters............................................................................. 85

Table 23-2—PPDU format as a function of CH_BANDWIDTH parameter ................................................ 91

Table 23-4—RATE field in L-SIG ................................................................................................................ 93

Table 23-3—Modulation-dependent parameters for Non-HT duplicate mode in TVWS band .................... 93

Table 23-5—Timing-related constants in Non-HT PPDU ............................................................................ 94

Table 23-6—Tone location in Non-HT PPDU .............................................................................................. 95

Table 23-7—Fields of the VHT PPDU in TVWS bands............................................................................... 96

Table 23-8—Timing-related parameters ..................................................................................................... 101

Table 23-9—Tone location.......................................................................................................................... 102

Table 23-10—Center frequency of a PPDU transmitted in frequency segment iSeg.................................. 104

Table 23-11—Tone scaling factor and guard interval duration values for PLCP fields ............................. 105

Table 23-12—Transmission mode and Gamma subk,m ............................................................................. 105

Table 23-13—B0-B1 (BW) in TVHT-SIG-A1 ...........................................................................................108

Table 23-14—Number of rows and columns in the interleaver .................................................................. 110

Table 23-15—LDPC Tone Mapping Distance for each transmission mode ............................................... 111

Table 23-16—Parameters for Non-HT duplicate transmissions.................................................................. 112

Table 23-17—Fields to specify TVHT channels......................................................................................... 113

Table 23-18—Spectral mask frequency scaling factor for contiguous transmission .................................. 115

Table 23-19—Spectral mask frequency scaling factor for TVHT_MODE_4N.......................................... 115

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Table 23-20—Spectral mask frequency scaling factor for TVHT_MODE_2N.......................................... 116

Table 23-21—Maximum transmit spectral flatness deviations ................................................................... 117

Table 23-22—Receiver minimum input level sensitivity............................................................................119

Table 23-23—Minimum required adjacent and nonadjacent channel rejection levels................................ 120

Table 23-24—Conditions for CCA BUSY on the primary channel............................................................ 122

Table 23-25—TVHT PHY characteristics .................................................................................................. 123

Table 23-26—TVHT MCSs for TVHT_MODE_1, NSS = 1...................................................................... 124

Table 23-27—TVHT MCSs for TVHT_MODE_1, NSS = 2...................................................................... 125

Table 23-28—TVHT MCSs for TVHT_MODE_1, NSS = 3...................................................................... 125

Table 23-29—TVHT MCSs for TVHT_MODE_1, NSS = 4...................................................................... 126

Table 23-30—TVHT MCSs for TVHT_MODE_2C and TVHT_MODE_2N, NSS = 1 ............................ 126

Table 23-31—TVHT MCSs for TVHT_MODE_2C and TVHT_MODE_2N, NSS = 2 ............................ 127

Table 23-32—TVHT MCSs for TVHT_MODE_2C and TVHT_MODE_2N, NSS = 3 ............................ 127

Table 23-33—TVHT MCSs for TVHT_MODE_2C and TVHT_MODE_2N, NSS = 4 ............................ 128

Table 23-34—TVHT MCSs for TVHT_MODE_4C and TVHT_MODE_4N, NSS = 1 ............................ 128

Table 23-35—TVHT MCSs for TVHT_MODE_4C and TVHT_MODE_4N, NSS = 2 ............................ 129

Table 23-36—TVHT MCSs for TVHT_MODE_4C and TVHT_MODE_4N, NSS = 3 ............................ 129

Table 23-37—TVHT MCSs for TVHT_MODE_4C and TVHT_MODE_4N, NSS = 4 ............................ 130

Table D-1—Regulatory requirement list ..................................................................................................... 170

Table D-2—Behavior limits sets ................................................................................................................. 170

Table E-4—Global operating classes .......................................................................................................... 171

Table E-7—TVWS GDD timer limits ......................................................................................................... 172

Table E-8—Device Identification Information Value fields ....................................................................... 173

Table E-9—WSM Information Value fields ............................................................................................... 173

Table E-10—TVWS GDD timer limits ....................................................................................................... 174

Table H-1—Payload Type field values ....................................................................................................... 175

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