IEEE 802 11 Perspectives on document 6 N

IEEE 802. 11 Perspectives on document 6 N 14746 (NB of China’s contribution on the MAC and PHY Specs for Wireless high data rate application 5. 4. 2 in 6 N 14603 WG 1 Agenda) EEE 802 Version 1. 0 IEEE 802. 11 -11 -865 r 0 IEEE Perspectives on Document N 14746 Page 1

Abstract This document provides a preliminary response from the IEEE 802. 11 Working Group on the proposal contained in document 6 N 14746 EEE 802 Version 1. 0 IEEE 802. 11 -11 -865 r 0 IEEE Perspectives on Document N 14746 Page 2

Topics • • Context and Introduction Overview of IEEE 802. 11 ac Potential areas of overlap and incremental techniques Potential technical issues with China NB proposal Potential marketplace issues with China NB proposal Preliminary conclusions Invitation EEE 802 Version 1. 0 IEEE 802. 11 -11 -865 r 0 IEEE Perspectives on Document N 14746 Page 3

Context and Introduction • IEEE Taskgroup 802. 11 ac has been working on the development of a new standard for Very High Throughput for <6 GHz (practically the 5 GHz band) since September 2008 – Currently status is Working Group Letter Ballot on draft 1. 0 • Document N 14746 from the China National Body contains a MAC/PHY proposal which targets the same frequency bands and usages and includes many of the same technical concepts as 802. 11 ac • However this proposal embodies key differences which would make devices that implement the proposed standard incompatible and noncoexistent with 802. 11 based devices in the same frequency band • This document outlines: – – Version 1. 0 A brief overview of IEEE 802. 11 ac Potential technical issues with the proposal in doc N 14746 Potential marketplace issues with the proposal in doc N 14746 Possible way forward IEEE 802. 11 -11 -865 r 0 IEEE Perspectives on Document N 14746 EEE 802 Page 4

Purpose, Scope and Timeline of IEEE 802. 11 ac Purpose: • • Provide significantly higher network throughput for existing WLAN application areas Enable new market segments for operation below 6 GHz including distribution of multiple multimedia / data streams and rapid synchronization Scope: Updates to both PHY and MAC to enable: • A multi-station network throughput of at least 1 Gbps • A maximum single link throughput of at least 500 Mbps • Below 6 GHz carrier frequency operation, excluding 2. 4 GHz operation I. e. 5 GHz operation generally, using same spectrum in use for. 11 a and. 11 n Timeline: – Taskgroup started Q 3, 2008 – Currently in stage of Working Group ballot of draft 1. 0 – Standard Finalization anticipated in Q 4, 2013 Version 1. 0 IEEE 802. 11 -11 -865 r 0 IEEE Perspectives on Document N 14746 EEE 802 Page 5

802. 11 ac Market Drivers • Industry cadence of new physical layer (PHY) technology introduction – Approximately every 3 -4 years, the Wi-Fi industry launches a program with a major upgrade to PHY capabilities • 2000: 11 b, 11 Mbps; 2003: 11 g, 54 Mbps; 2007: 11 n, 300 Mbps – The IEEE 802. 11 ac taskgroup is currently developing a standard for new PHY capabilities, targeting Gbps link rates in the 5 GHz band • Higher Throughputs are highly compelling for enabling technologies such as Wi-Fi Direct, 802. 11 z/TDLS and Wi-Fi Display; – Widens the ecosystem of Wi-Fi enabled devices – Gig. E routers and storage devices are expected to complement the ecosystem • 802. 11 ac technology will be highly relevant for several High Value Use Cases, among which: – – – Version 1. 0 Compressed Video streaming throughout the home Wi-Fi Display ‘Rapid Synch and Go’ and Back Up file transfer Wireless Networking for Home and Small Office Manufacturing Floor Automation IEEE 802. 11 -11 -865 r 0 IEEE Perspectives on Document N 14746 EEE 802 Page 6

New technologies in 802. 11 ac • Wider channel bandwidths: • • 80 MHz and 160 MHz channel bandwidths 80 MHz mandatory for STA, 160 MHz optional • More spatial streams: • Support for up to 8 spatial streams (vs. 4 as in 11 n) • Multi-user MIMO (MU-MIMO) • A technique where multiple STAs, each with potentially multiple antennas, transmit or receive independent data streams simultaneously • “Space Division Multiple Access” (SDMA): streams not separated by frequency, but instead resolved analogously to 11 n-style MIMO • Downlink MU-MIMO (one transmitting device, multiple receiving devices) included as an optional mode • Modulation • 256 -QAM, rate ¾ and 5/6, added as optional modes • Other elements/features: • • • Version 1. 0 Single sounding and feedback format for beamforming (vs. multiple in 11 n) MAC modifications (mostly to adapt to above changes) Coexistence mechanisms for 20/40/80/160 MHz channels, 11 ac and 11 a/n devices IEEE 802. 11 -11 -865 r 0 IEEE Perspectives on Document N 14746 EEE 802 Page 7

Current spectrum availability for 802. 11 ac operation in select geographic markets US Europe & Japan India China Version 1. 0 EEE 802 IEEE 802. 11 -11 -865 r 0 IEEE Perspectives on Document N 14746 Page 8

Examples of new configurations enabled by. 11 ac Scenario* Typical Client Form-factor Link Rate Aggregate Capacity 1 Tx AP, 1 Rx, 80 MHz Handheld 433 Mbps 2 Tx AP, 2 Rx, 80 MHz Tablet, Laptop 867 Mbps 1 Tx AP, 1 Rx, 160 MHz Handheld 867 Mbps 2 Tx AP, 2 Rx, 160 MHz Tablet, Laptop 1. 73 Gbps 4 Tx AP, 4 1 -Rx STAs, 160 MHz Handheld 867 Mbps to each STA 3. 47 Gbps 8 Tx AP; 160 MHz • 1 4 -Rx STA • 1 2 -RX STAs • 2 1 -RX STAs DTV, STB, Tablet, 3. 47 Gbps to 4 RX STA; PC, Handheld 6. 9 Gbps 8 Tx AP; 4 2 -Rx STAs, 160 MHz DTV, Tablet, Laptop, PC 6. 9 Gbps 1. 73 Gbps to 2 RX STA; 867 Mbps to each 1 -RX STA 1. 73 Gbps to each STA * All scenarios assume 245 QAM Modulation, and rate 5/6 coding Version 1. 0 IEEE 802. 11 -11 -865 r 0 IEEE Perspectives on Document N 14746 EEE 802 Page 9

Taskgroup IEEE 802. 11 ac has active participation from a large number of companies, originating from all over the globe • In taskgroup IEEE 802. 11 ac, engineers who work for a large international group op Companies and Research Institutes are collaborating to develop a global industry standard • 802. 11 ac has active participants from: – – – Australia Belgium Canada China France Finland - Germany - Great Britain - India - Israel - Japan - Netherlands - Singapore - South Korea - Taiwan - USA • For example the recent submission for the creation of Draft 1. 0 of 802. 11 ac (doc 11/1361) lists participants from the following companies: – – – – Version 1. 0 Broadcom (USA) Celeno (Israel) Cisco (USA) ETRI (South Korea) Huawei (China) Intel (USA) Kyushi Institute (Japan) LG Electronics (South Korea) - Marvell (USA) - Mediatek (Taiwan) - Qualcomm (USA) - Radrix (Japan) - Realtek (Taiwan) - Samsung (South Korea) - ST Ericsson (Italy / France) - ZTE (China) IEEE 802. 11 -11 -865 r 0 IEEE Perspectives on Document N 14746 EEE 802 Page 10

Potential Areas of Overlap and Incremental Features in N 12746 • A high level comparison of the China NB proposal and 802. 11 ac highlights the following areas of overlap: – – – • Targeted frequency (<6 GHz) 20/40/80 MHz modes MU-MIMO 256 QAM LDPC The proposal introduces a set of incremental features which, in theory, can lead to higher throughputs, e. g. : – – – – Code rate 7/8 for 256 QAM Non-contiguous 20 MHz channels Denser carrier spacing for OFDM (4 x) Up to 8 SS support of DL MU-MIMO Unequal Modulation Uplink MU MIMO Expanded LDPC Matrix Scheduled TDMA MAC Note: Document N 14746 contains a high level overview of the proposed standard and no detailed analysis of the overlap and differences can be provided at this time Version 1. 0 IEEE 802. 11 -11 -865 r 0 IEEE Perspectives on Document N 14746 EEE 802 Page 11

Potential Technical Issues Preliminary analysis of the proposal points to some high level issues: 1. The scheduled TDMA MAC will cause coexistence issues with 802. 11 devices operating in the same frequency band in overlapping networks – In situations where the overlapping networks operate in different administrative domains, as is typically the case in residential and SMB settings 2. The proposed preamble is likely to cause coexistence issues with 802. 11 based devices – May lead to false detects and wrong defer on. 11 a/n/ac and degraded performance 3. Significantly higher sensitivity to frequency error and phase noise compared to. 11 ac – Unclear how the preamble can work for 40 ppm combined with Tx/Rx frequency offset 4. Complexity Issues: – – Version 1. 0 Proposal introduces new techniques that add significant complexity to a device with questionable benefits (e. g. 7/8 coding for 256 QAM, large LDPC matrix) It is non-trivial to build a combo 80211/N 14746 device that actually works IEEE 802. 11 -11 -865 r 0 IEEE Perspectives on Document N 14746 EEE 802 Page 12

Potential Marketplace Issues • The dynamics inside the 802. 11 based ecosystem are highly competitive, which leads to rapid innovation and scale advantages for 802. 11 based devices • The 802. 11 / Wi-Fi Alliance ecosystem has emerged as the winning ecosystem for WLAN applications, ‘outcrowding’ other efforts like ETSI Hiper. LAN 2, Home RF and others • IEEE 802. 11 ac benefits from all other elements of the 802. 11 standards family, e. g: – Backwards compatibility and coexistence with. 11 a and. 11 n – MAC functionality such as Qo. S, security, TDLS, Mesh, . 11 v Powersave, . 11 aa Videostreaming, Fast Session Transfer with 60 GHz, interworking with cellular etc, etc. • Wi-Fi Alliance Impact – Wi-Fi Certification plays a key role in customer adoption of new WLAN technology (especially for Large Service Providers, Enterprises and Global equipment OEMs); • WFA plans to certify 802. 11 ac based devices – WFA creates its own value added industry specifications (e. g. Wi-Fi Direct for Peer to EEE Peer, Wi-Fi Display) • Version 1. 0 802. 11 ac will be compatible with these specifications and programs IEEE 802. 11 -11 -865 r 0 IEEE Perspectives on Document N 14746 802 Page 13

Preliminary Conclusions • • • Document N 14746 contains a set of valuable advanced concepts for a High Throughput WLAN system The proposal in N 14746 and IEEE 802. 11 ac are targeting similar frequency bands, usages and largely similar techniques. The China NB includes some incremental and different techniques from 802. 11 ac, however 802. 11 ac has the following significant advantages: – Full compatibility and coexistence with the installed base of. 11 a /. 11 n systems – Leverages all Qo. S, Security and other value added MAC features of the 802. 11 family of standards – Spec is developed, and peer-reviewed by the global experts in the field – Contributions and support from participants and companies from all over the world – Wi-Fi Alliance Interop Certification and WFA value added industry specs – First to market advantage in terms of implementations • It is very difficult to establish the need for an additional Global standard that tries to address the same frequency bands, usages and techniques, but is faced with significant technical and marketplace drawbacks Version 1. 0 IEEE 802. 11 -11 -865 r 0 IEEE Perspectives on Document N 14746 EEE 802 Page 14

Invitation • Inserting (some of) the concepts included in N 14746 into the discussion for subsequent additions to the IEEE 802. family of standard will be highly appreciated! • IEEE 802. 11 initiates new taskgroups on a regular basis, and some of the technologies identified in N 14746 have already been identified as potential extensions to IEEE 802. 11 • IEEE 802. 11 is open for anyone to join, to participate in technical discussions and to make contributions EEE 802 Version 1. 0 IEEE 802. 11 -11 -865 r 0 IEEE Perspectives on Document N 14746 Page 15