ieee 802 wireless interim session 會議報告std-share.itri.org.tw/content/files/report/files/ieee...
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出國報告(出國類別:其他)
IEEE 802 Wireless Interim Session會議報告
出國報告人：許仁源
派赴國家：中國/南京
出國期間：102年 9月 15日至 102年 9月 21日
報告日期：102年 10月 22日
摘 要
High Efficiency WLAN Study Group，此研究群組主要在討論下世
代Wi-Fi技術的制定，此技術需能解決 Cellular網路擁塞之 offload情
境與應用下所面臨之問題，包括大量行動裝置(STA)之擁塞網路、大
量接取點(AP)之擁塞異質網路及室外佈建情境下之效能提升。此 SG
將 Focus在 2.4G/5G頻帶進行 802.11 PHY/MAC規格之修訂，目前的
進度已經有整理出一份各家大廠同意的主要應用情境，各家大廠有分
別提案討論自己的物理層技術。
技術貢獻
此次會議主要以觀察目前High Efficiency WLAN Study Group 以
及802.11WG的工作群組之進展。
會議解說
由於TGac目標在年底完成Sponsor Ballot，因此802.11WG的大多
數公司漸將佈局轉往Next Generation WLAN的新標準制定，High
Efficiency WLAN研究群組。此研究群組將負責研擬範圍、使用情境、
決定效能指標及制定PAR與5C。 其目標設定為具體提升下世代Wi-Fi
技術之頻譜效能與區域資料吞吐量以滿足使用者之Quality of
Experience，新技術將Focus在2.4G/5G頻帶進行802.11 PHY/MAC規格
之修訂以解決下世代802.11所面臨到之三大課題，包括大量行動裝置
(STA)之擁塞網路、大量接取點(AP)之擁塞異質網路及室外佈建情境
下之效能提升。這部分目前參與的廠商以及人數也是最多的，將是未
來我們需持續關注並積極參與技術部局之重點，目前已經有整理出一
份各家大廠同意的主要應用情境，各大廠商分別有提出一些技術討
論，主席也有整理出一份文件表明現在討論的一些可能性技術。
與會成員工作分配
與會成員 任 務
許仁源 參與HEW SG與WG，掌握工作群組之提案情形及未來
新研究群組之發展。
目 錄
1.會議名稱 ...................................................................................................................... 5
2.參加會議目的及效益 .................................................................................................. 5
3.會議時間 ...................................................................................................................... 5
4.會議地點 ...................................................................................................................... 5
5.會議議程 ...................................................................................................................... 6
6.會議紀要 ...................................................................................................................... 9
6.1. 802.11 WG .................................................................................................. 9
6.2. HEW SG .................................................................................................... 10
6.2.1. 會議議程 .............................................................................................. 10
6.2.2. 會議提案 .............................................................................................. 10
6.2.3. 會議重點整理 ...................................................................................... 12
6.2.3.1. HEW SG轉寄WFA Letter文件 .................................................... 12
6.2.3.2. HEW SG技術文件整理 ................................................................. 14
6.2.3.3. HEW SG重要投票討論 ................................................................. 18
6.3. WNG ......................................................................................................... 20
7.心得與建議 ................................................................................................................ 20
8.附件 ............................................................................................................................ 22
1. 會議名稱
IEEE 802Wireless Interim Session Meeting
2. 參加會議目的及效益
o 參與工作群組會議，針對相關之技術議題進行討論。
o 與其它大廠接觸以討論合作項目。
o 參與技術協商及立場表達。
3. 會議時間
o Sep. 15, 2013 ~ Sep. 19, 2013
4. 會議地點
o Zhong Shan Hotel, Nanjing, China
6
5. 會議議程
本次IEEE 802 Wireless Interim Session 議程安排如下表:
表一、IEEE 802.11WG 會議議程
此次會議主要任務為參加High Efficiency WLAN (HEW SG)的討
論，HEW SG與WNG之會議議程安排分別如表二~三所示。
表二、HEW SG議程
Date Time Details
Monday –Sep. 16 16:00 – 18:00
PM2 slot
• Call Meeting to order
• IEEE 802 and 802.11 IPR Policy and procedure.
• Review from July 2013 meeting
• Progress Review
• Call for submission
• Agenda setting
• Presentations
7
Date Time Details
• Recess
Monday –Sep. 16 19:30 – 21:30
PM3 slot
• Call Meeting to order
• IEEE 802 and 802.11 IPR Policy and procedure.
• Presentations
• Recess
Tuesday –Sep. 17 10:30 – 12:30
AM2 slot
• Call Meeting to order
• IEEE 802 and 802.11 IPR Policy and procedure.
• Presentations
• Recess
Tuesday –Sep. 17 16:00 – 18:00
PM2 slot
• Call Meeting to order
• IEEE 802 and 802.11 IPR Policy and procedure.
• Presentations
–11-13/1100 – Osama Aboul-Magd
–11-13/1163 – Sean Coffey
–11-13/1164 – Paul Lambert
–Presentations
• Recess
Tuesday –Sep. 17 19:30 – 21:30
PM3 slot
• Call Meeting to order
• IEEE 802 and 802.11 IPR Policy and procedure.
• Presentations
• Recess
Wednesday –Sep.
18 13:30－15:30
PM1 slot
• Call Meeting to order
• IEEE 802 and 802.11 IPR Policy and procedure.
• Presentations
–SS/SM/EM
–CM
• Recess
Wednesday –Sep.
18 16:00 – 18:00
PM2 slot
• Call Meeting to order
• IEEE 802 and 802.11 IPR Policy and procedure.
• Presentations
• Recess
Thursday –Sep. 19 08:00 – 10:00
AM1 slot
• Call Meeting to order
• IEEE 802 and 802.11 IPR Policy and procedure.
8
Date Time Details
• Presentations
–11-13/1133
–11-13/1122
–11-13/1157
• Recess
Thursday –Sep. 19 13:30 – 15:30
PM1 slot
• Call Meeting to order
• IEEE 802 and 802.11 IPR Policy and procedure.
• Presentations
–11-13/1157, “Feasibility of Coordination
Transmission for HEW”, Yunzhou Li (Tsinghua
University)
–11-13/1115, “, “Possible vision of the HEW-driven
Wi-Fi '2020”, Minho Cheong (ETRI).
• Goals for November2013
• Telecons Schedule
• Adjourn
Friday –Sep. 20 08:00 – 10:00
AM1 slot • IEEE 802.11 Closing
Friday –Sep. 20 10:30 – 12:30
AM2 slot • IEEE 802.11 Closing
表三、WNG SC議程
Da
y
Time
Slot Topic Detail
Tue
10:00
–
12:30
PM2
slot
Open Call to order, Guidelines and rules
Presentation • Dynamic Sensitivity Control Improvement to Area Throughput –
Graham Smith
Plans for
November
9
6. 會議紀要
6.1. 802.11 WG
會議人數觀察與趨勢
會議參與國別
國別 人數 比例
AUSTRALIA 2 0.6%
CANADA 8 2.6%
CHINA 85 27.4%
FINLAND 1 0.3%
FRANCE 2 0.6%
GERMANY 3 1.0%
INDIA 3 1.0%
IRELAND 1 0.3%
ITALY 1 0.3%
JAPAN 32 10.3%
KOREA, REPUBLIC OF 41 13.2%
NETHERLANDS 3 1.0%
SINGAPORE 9 2.9%
SWEDEN 2 0.6%
TAIWAN 11 3.5%
UK 5 1.6%
10
USA 100 32.3%
USA VIRGIN ISLANDS 1 0.3%
TOTAL 310 100.0%
6.2. HEW SG
6.2.1. 會議議程
此次會議 HEW SG共有 9個時段，提案著重在 Simulation Methodology (SM)、
Simulation Scenario (SS)、Evaluation Methodology (EM)、Function Requirement (FR)
提案討論，亦包含部 General (GEN)與 Technical (TECH)等提案；共有不同公司的提
案 50個。其報告之順序如下:
SM/SS/EM
GEN
CM
FR
TECH
6.2.2. 會議提案
會議提案明細如下
Submission Number/Title Category
11-13/996, “Outdoor Channel Model Candidates for HEW”, Kaushik Josiam (Samsung) CM
11-13/1000, “Simulation Scenarios”, Simone Merlin (Qualcomm) SS
11-13/1001, “Simulation Scenarios Document Template”, Simone Merlin (Qualcomm) SS
11-13/1046, “Discussion for Massive MIMO for HEW”, Zhigang Wen (BUPT) TECH
11-13/1051, “Evaluation Methodology”, Ron Porat (Broadcom) EM
11
11-13/1054, “Evaluation Metrics”, ZTE EM
11-13/1056, “Enhancement on resource utilization in OBSS environment”, LG
Electronics (Giwon Park)
TECH
11-13/1057, “Legacy support on HEW frame structure”, Jinyoung Chun (LG
electronics)
GEN
11-13/1058, “Efficient wider bandwidth operation”, Suhwook Kim TECH
11-13/1059, “PHY abstraction for HEW evaluation methodology”, Dongguk Lim (LG
Electronics).
EM
11-13/1061, “Multicat transmission for HEW”, Jeongki Kim (LG Electronics) TECH
11-13/1073, “Access control enhancement”, Katsuo Yunoki (KDDI R&D Laboratories) TECH
11-13/1074, “Occupied air time calculation for doc.1073r0”, Katsuo Yunoki (KDDI
R&D Laboratories).
TECH
11-13/1077, “EDCA Enhancements for HEW”, Hui Zhao (BUPT) TECH
11-13/1079, “Outdoor Stadium Simulation Details Discussion”, Joseph Levy
(InterDigital)
SM/SS
11-13/1080, “Markov Modeling of the Channel for HEW System Level Simulations”,
Joseph Levy (Interdigital)
SM/SS
11-13/1081, “HEW Simulation Methodology”, Sayantan Choudhury (Nokia). SM/SS
11-13/1083, “HEW SG Unified Simulation Scenarios”, David Xun Yang (Huawei) SM/SS
11-13/1089, “D2D Technology for HEW”, Zhanji Wu (BUPT) TECH
11-13/1090, “Non-linear pre-coding for next generation WLAN”, Zhanji Wu (BUPT) TECH
11-13/1097, “functional requiremenst for the HEW PAR”, Minho Cheong (ETRI) FR
11-13/1100, “HEW SG Progress Review”, Osama Aboul-Magd (HEW) G
11-13/1105, “Discussion on Access Mechanism for HEW”, Meng Yang (CATR) TECH
11-13/1133, “Channel modeling for dense Wi-Fi environments”, Minho Cheong (ETRI) CM
11-13/1114, “Simulation scenario for unplanned Wi-Fi network” Minho Cheong
(ETRI)
SM/SS
11-13/1115, “Possible vision of the HEW-driven Wi-Fi '2020”, Minho Cheong (ETRI) G
11-13/1116, “Discussion on HEW Functional Requirements”, Jinsoo Choi (LG
Electronics)
FR
11-13/1122, “Considerations for In-Band Simultaneous Transmit and Receive (STR)
feature in HEW”, Rakesh Taori (Samsung Electronics)
TECH
11-13/1123, “Capacity Simulation of High Density Indoor WLAN Systems”, Furuskar
et al (Ericsson)
SM/SS
11-13/1125, “outdoor channel model discussions”, Hongyuan Zhang (Marvell) CM
11-13/1126, “beamforming under OBSS interference”, Hongyuan Zhang (Marvell) TECH
11-13/1131, “PHYabstraction for HEW system level simulation”, Jiayin EM
12
Zhang(HUAWEI)
11-13/1133, “Virtual Desktop Infrastructure (VDI)”, Yingpei Lin (Huawei) SM/SS
11-13/1135, “Summary On HEW Channel Models”, Jianhan Liu (Mediatek Inc.) CM
11-13/1137, “Definition of performance metric”, Huai-Rong Shao (Samsung
Electronics)
EM
11-13/1144, “Simplified Traffic Model Based On Aggregated Network Statistics”,
William Carney (Sony)
EM
11-13/1146, “Update on HEW Channel Model”, Shahrnaz Azizi (Intel Corp) CM
11-13/1153, “Simulation scenario proposal” Laurent Cariou SM/SS
11-13/1158, “Video Traffic and Applications for HEW” William Carney (SONY) EM
11-13/1159, “Video app performance requirements and simulation paramters”Intel SS
11-13/1162, “Video Application Categories and Characteristics”, Intel SS
11-13/1163, “PAR and 5C: Comments based on 11n”, Sean Coffey (Realtek) G
11-13/1164, “Some Par and 5C Requirements” Marvell G
11-13/1168, “Requirements on WLAN Ad Push”, Hui Tian(BUPT) TECH
11-13/1169, “WLAN Cellular Offload in High Speed Moving Environment”, Hui
Tian(BUPT)
TECH
11-13/1176, “Some Simulation Scenarios for HEW”, Reza Hedayat SS
11-13/1155, “Space Division Multiplex for OBSS Interference Suppression”, Yongming
Huang(Southeast University)
TECH
11-13/1154, “DL-MU-MIMO Transmission with Unequal Bandwidth”, Yongming
Huang(Southeast University)
TECH
11-13/1156, “TXOP Redundancy NAV Clear”, Yongming Huang(Southeast University) TECH
11-13/1157, “Feasibility of Coordination Transmission for HEW”, Yunzhou Li
(Tsinghua University)
TECH
6.2.3. 會議重點整理
6.2.3.1. HEW SG轉寄WFA Letter文件
為了確認 HEW SG所討論的 Usage Model具有合理性，HEW SG請求WiFi Alliance
(WFA) 針對 Usage Model給予回饋；經過幾次會期討論，此次會議 HEW SG正式
通過相關文件交與WFA，重點內容如下:
13
Usage Model回饋:
2013年 5月，IEEE802.11工作組通報了WFA新的高效率的無線局域網（HEW）
SG，和其有關的工作相關的使用模式的定義。隨著科技的發展，HEW使用模式的
初稿，整理如下，值得注意的是第四跟第五項，一個是室外的使用環境，另一個則
新興應用層面的發展。
1 high density of APs and high
density of STAs per AP
a stadium
b airport/train stations
c exhibition hall
d shopping malls
e E-Education
f Multi-media Mesh backhaul
2 high density of STAs – Indoor
a dense wireless office
b public transportation
c lecture hall
d Manufacturing Floor Automation
3 high density of APs (low/medium
density of STAs per AP) – Indoor
a dense apartment building
b Community Wi-Fi
4 high density of APs and high
density of STAs per AP – Outdoor
a Super dense urban Street
b Pico-cell street deployment
c Macro-cell street deployment
5 Throughput-demanding
applications
a surgery/health care (similar to 2e from 11ac)
b production in stadium (similar to 1d-1e from 11ac)
c smart car
與 11ac (VHT)不同說明
部分使用情境與應用不同:
– with respect to the environments:
– 對於 public access 以及 traffic offload 熱點密集度高的區域分別是 indoor
(category 1) 以及 and outdoor (category 4)
– 在傳統家庭和企業的情境下，這些場景的演變朝著高密度情況下發展
– with respect to the applications:
– 而 802.11ac標準的使用模式，專注於一個單一的應用程序為一個單一的
客戶端，HEW使用的模型考慮客戶端的不同應用和不同的流量，並著重
14
於這些更為複雜和密集的情況下（第 1類，2，3和 4）的所有客戶的感
受體應
效能改善目標不同:
– with respect to the objectives:
– 不像 802.11ac的提高理論峰值吞吐量，HEW的目標將是增加Wi-Fi的效
益以及改善用戶的體驗，並加強整體Wi-Fi每單位區域的通訊容量。
– with respect to the metrics:
– 目標是不同的。因此，可能是不同的度量。
– 這些指標目前正在 HEW討論。潛在的候選指標包括“平均每用戶吞吐量
“，“第 5百分位的每用戶吞吐量 CDF“，“面積吞吐量“（考慮到帳戶的
MAC和 PHY開銷）
6.2.3.2. HEW SG技術文件整理
Simulation Scenario、Simulation Methodology、Evaluation Methodology
David Xun Yang (Huawei) presented HEW Simulation Scenario based on
13/1083r0
– Summary –建議要包含四類情況，即企業，住宅，室內熱點和戶外熱點
– 建議的總結在投影片的第九頁
Ron Porat (Broadcom) presented “Evaluation Methodology”, based on 13/1051r1
– Summary –建議有三種工具來評估 HEW的提案
– Simulation methodology – PER simulation, PHY System simulation and MAC System
simulation. System level simulation will be the major interest of the HEW
– Traffic Model – Full buffer, Poisson and application specific model such as video
– Straw Poll: “Do you agree to use contribution 13/1051 as a baseline evaluation
methodology?” Result: Y/N/A = 48/6/54
15
Huai-Rong (Samsung Electronics) presented “The Definition of Performance
Metrics for HEW” based on 13/1137r1
– Summary –“區域吞吐量”的定義
– Discussed issues in defining performance metrics
– Suggested performance metrics: (i) Average Throughput per Area Unit or Average
Throughput per BSS, (ii) Average Throughput per STA, (iii) 5th percentile of
Throughput CDF per STA
– Other performance requirements/metrics also need to be considered
Yonggang Fang (ZTETX) presented “HEW Evaluation Metrics Suggestions” based
on 13/1054r0
– Summary –HEW評估方法的一些建議
– Scenarios – Outdoor, Indoor/Outdoor, planned & unplanned deployments
– System Configurations – multi-layer network configuration, # of antennas, etc.
– Link level evaluation – Receiver and transmitter performance metrics, MAC efficiency
– System level evaluation - Spectrum efficiency, Throughput (Single User Throughput
& Network Capacity), Robustness, Availability, User Experience and Handover
performance
Jiaying Zhang (Huawei) presented “PHY Abstraction for HEW System Level
Simulation”, based on 13/1131r0
– MIESM (RBIR)可以提供一個快速的信道模型獨立的預測一個 SINR預測瞬時誤差
率，透過使用的 OFDM傳輸碼字的整個資源單位。
Dongguk Lim (LG Electronics) presented “PHY Abstraction for HEW Evaluation
Methodology”, based on 13/1059r0
– As the PHY abstraction methods, Mutual Information Based approach (MMIB) and
(CC) is compared.
Laurent Cariou (Orange) presented “Simulation Scenario Proposal”, based on
13/1153r0
– 提出密集熱點 2b和戶外大 BSS 3A方案設計
– Options should be defined in the scenarios in order to capture all traffic or types of
devices that can have an impact on specific solutions.
– In the evaluation methodology/selection procedure, each family of proposed solutions
should be linked to specific simulation scenario(s) and their option(s).
Simone Merlin (Qualcomm) presented “Simulation Scenarios”, based on 13/1000r2
16
and 13/1001r1.
– A simulation scenario is defined by (i) Topology, (ii) Traffic Model, (iii) List of
PHY/MAC and Management parameters, and (iv) Interference scenario.
– Slide 9 contains proposed set of simulation scenarios
– Straw Poll #1: Do you agree with the definition of the initial set of
simulation scenarios as in the table on slide 9? Y/N/A = 58/7/44
– Straw Poll #2: Do you agree to use the document 11-13/1001r2 as a
template for the Simulation Scenarios Document? Y/N/A = 59/0/54
Reza Hedayat (Cisco Systems) presented “Some Simulation Scenarios for HEW”,
based 13/1176r0
– 在 HEW使用的模擬場景，需要強調真實世界中的表現
– HEW simulation scenarios must include real world, high density AP/STA environments
– Simulation should include a high density AP/STA scenario with P2P traffic
– Simulation should include a high density AP/STA scenario with many unassociated
clients
– Simulation should include a high density AP/STA scenario with sticky clients
Channel Model
Hongyuan Zhang (Marvell) presented “HEW Outdoor Channel Model Discussions”
based on 13/1125r3
– UMi應該是 HEW室外通道模型的選項。
– 建議考慮距離相關的鏈路級模擬的戶外信道模型。
– ITU models (UMi and Uma) to be investigated.
Joseph Levy (InterDigital) presented “Outdoor Stadium Simulation Detail
Discussions”, based on 13/1079r0.
17
– 提出的 HEW戶外體育場模型的變種，提供更好 1A體育場場景的對照在
11-13/0657r6，更加緊密的當前球場的配置模型。
– The parameters of this model should be agreed so that meaningful system simulations
and performance evaluation of HEW techniques can be evaluated.
Jianhan (MediaTek) presented “Summary of HEW Channel Models”, based on
13/1135r4.
– 提出的 HEW戶外體育場模型的變種，提供更好 1A體育場場景的對照在
11-13/0657r6，更加緊密的當前球場的配置模型。
– The parameters of this model should be agreed so that meaningful system simulations
and performance evaluation of HEW techniques can be evaluated.
Jianhan (MediaTek) presented “Summary of HEW Channel Models”, based on
13/1135r4.
– For the indoor channel model, TGn and TGac channel models should be respected.
– For the outdoor channel model for HEW should be based on ITU UMi and UMa models
– HEW design shall ensure that Wi-Fi works well under UMi.
Straw Poll #1: Do you agree to adopt ITU channel models as the base line of
HEW outdoor channel models? Y/N/A = 79/0/23
Straw Poll #2: Do you agree the following basic design criteria? Y/N/A =
65/14/38
– HEW design shall ensure that Wi-Fi works well under UMi
– HEW design should ensure that Wi-Fi still works under UMa
Function Requirement
Jinsoo Choi (LG Electronics) presented “Discussion on HEW Functional
Requirement” based on 13/1116r0
– HEW的主要目標是從舊標準演化出來 - 主要著重在於“真實”世界中的'平均'系統
的角度性能最大化。
– In addition, there is increasing needs to enhance quality of experience (QoE) from
user-perspective.
– HEW should capture both system-perspective and user-perspective requirements such as
“Area Throughput”, “Average 5th percentile user throughput” and “Average throughput
per STA”
Minho Cheong (ETRI) presented “Functional Requirements for HEW PAR”, based
on 13/1097r0
18
– Reviewed PARs of 802.11n, 802.11ah and 802.11ac.
– Area throughput will be the most important metric for HEW PAR
Technical Proposal
Hongyuan (Marvell) presented “Beamforming under OBSS Interference” based on
13/1126r0
– In dense deployments, co-channel interference (CCI) or collision from OBSS is
unavoidable.
– Evaluated the performance benefit of TxBF in OBSS environment by over the air
measurements great performance gain against CCI/collisions.
– HEW may consider fully explore baseline 11ac TxBF as a mandatory baseline feature
for APs with possible improvements.
Rakesh Taori (Samsung Electronics) presented “Considerations for In-Band
Simultaneous Transmit and Receive (STR) feature in HEW”, 1122r0
– In-Band Simultaneous Transmit and Receive (STR): The ability of a station S1 to
successfully decode the transmissions received from station S2 while transmitting to
station S2 or another station S3 on the same frequency resource.
– Advances in Self-Interference Cancellation make this technique feasible.
– Some MAC mechanisms for STR were introduced and analyzed.
In-band simultaneous transmit and receive (STR) feature should be
considered for inclusion in HEW even if fundamental changes to the MAC are
incurred. In favor: 44, Oppose: 20, Abstain: 48
6.2.3.3. HEW SG重要投票討論
HEW SG Progress
Osama Aboul-Magd (Huawei Technologies) presented “HEW SG Progress
Review”, based on 13/1100r0
19
Simulation Scenarios
Simone Merlin (Qualcomm) presented “Simulation Scenarios”, based on 13/1000r2
and 13/1001r1.
– Straw Poll #1: Do you agree with the definition of the initial set of
simulation scenarios as in the table on slide 9? Y/N/A = 58/7/44
– Straw Poll #2: Do you agree to use the document 11-13/1001r2 as a
template for the Simulation Scenarios Document? Y/N/A = 59/0/54
Channel Model
Straw Poll #2: Do you agree the following basic design criteria? Y/N/A =
65/14/38
– HEW design shall ensure that Wi-Fi works well under UMi
– HEW design should ensure that Wi-Fi still works under UMa
In-Band Simultaneous Transmit and Receive (STR)
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In-band simultaneous transmit and receive (STR) feature should be considered for
inclusion in HEW even if fundamental changes to the MAC are incurred. In favor:
44, Oppose: 20, Abstain: 48
6.3. WNG
提供有潛力之技術題目
Graham Smith (DSP Group) “Dynamic Sensitivity Control improvement to area
throughput”, 13/1012r3
– Dynamic Sensitivity Control - DSC
– Upper Limit and Margin can be adjusted to suit the application for an optimum result
(AP could control)
7. 心得與建議
目前在802 LMSC中參與最為火熱的任務群組，是802.11。802.11 WiFi
提供便捷的無線應用環境，使得WiFi已成為目前裝置上網的重要接取
技術，從與會人數統計， IEEE 802.11標準成為IEEE最受重視的無線通
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訊標準，與會人數比其他IEEE無線標準多，此次802.11會議即有296人
參加，是其他無線標準2倍以上，較上次會期增加42人。
因為行動通訊之Traffic Offload與智慧手機上網之需求，WiFi上網裝
置數量急遽上升，衝擊原有Un-Licensed頻段之頻譜利用效率，無論是
雲端運算應用的資料傳輸量跟影音資料傳輸量的預估，在2017年之前都
會有驚人的成長；為解決這些問題以符合巨大市場之需求，HEW SG相
關技術受到各通訊公司重視，參與人數明顯高於其他群組；在各方看好
的情況，且802.11ac等標準陸續進入收尾階段，HEW標準將持續吸引更
多公司加入制定。
IEEE 802.11WG本次會議重點仍在HEW SG上。HEW SG將於2014年5
月前完成PAR與5C並且於7月正式成立TG；HEW將在現有基礎上持續
進行包括usage models之討論，並且將制定Channel models及Evaluation
Methodology與Simulation Scenarios等文件，方便在擬定PAR與5C的現
階段，能儘速確認Scope與需求。另外HEW也已開始著手討論functional
requirements。
由於HEW代表著下世代的WLAN技術，除了Spectrum Efficiency進行
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一步提升外， Area Throughput的提升將會是一大特點，而這也將是有
較大幅度進行標準設計變更之機會，我們需持續從應用場景去著手，進
行相關技術之先期佈局，以求能在此標準技術掌握關鍵之核心技術，協
助國內建立在WLAN的essential IPR。
8. 附件
由於此種國際會議都嚴禁拍照場內拍照，所以僅能在適當時機拍下場內
的討論情況。
23
圖、IEEE 802.11.TG會場
圖、IEEE 802.11.TG會場
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圖、IEEE 802.11.TG會場
圖、IEEE 802.11.TG會場
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圖、IEEE 802.11.TG會場