Doc.: IEEE 802.11-10/492r02 Submission Orange Labs Date: 2010-05-19 Collaboration between 2.4/5 and...

doc.: IEEE 802.11-10/492r02

Submission Orange Labs

Date: 2010-05-19

Collaboration between 2.4/5 and 60 GHz

May 2010

Authors:Name Company Address Phone email Ichihiko Toyoda NTT 1-1, Hikarinooka,

Yokosuka, Japan +81 46 859 2366 [email protected]

Laurent Cariou Orange Labs /France Telecom

+33 2 99 12 43 50 [email protected]

Sandrine Roblot Orange Labs /France Telecom

+33 2 99 12 45 11 [email protected]

Philippe Christin

Orange Labs /France Telecom

4 rue du clos courtel 35512 Cesson-Sévigné, France

+33 2 99 12 47 93 philippe.christin @orange-ftgroup.com

Thomas Derham Orange Labs /France Telecom

Keio Shinjuku Oiwake Bldg. 9F.3-1-13 Shinjuku Shinjuku, Tokyo, Japan

+81 35 312 8563 [email protected]

Yusuke Asai NTT 1-1, Hikarinooka, Yokosuka, Japan


Koichi Ishihara NTT 1-1, Hikarinooka, Yokosuka, Japan


Takeo Ichikawa NTT 1-1, Hikarinooka Yokosuka, Japan


Yuichi Morioka Sony Corporation 5-1-12 Kitashinagawa Shinagawa, Tokyo

+81-3-5448-4018 [email protected]

Ted Booth Sony Electronics Inc.

16530 Via Esprillo, San Diego, CA

+1-858-942-8044 [email protected]

Changsoon Choi IHP Im Technologiepark 25, Frankfurt (oder)

+49 3355625 155 [email protected]

Philippe Chambelin

Technicolor 1 Av Belle Fontaine 35576 Cesson Sévigné

[email protected]

doc.: IEEE 802.11-10/492r02


• 60 GHz is by itself a promising technology that will provide multi-Gbps throughput at short range.

• The inclusion in TGad of fast session transfer feature opens the door to a convergence between all past and future 802.11 technologies and to potential improvements– of each technology,

– and of the overall home network.

• In [3], we have presented a simple solution for fast session transfer which satisfies one of the potential use cases that can be envisioned.

• In this proposal, we propose new use cases, based on various means of collaboration between 2.4/5 and 60 GHz to extend FST.

Abstract

May 2010

Slide 2

doc.: IEEE 802.11-10/492r02


Use case 12.4/5GHz Assisted 60GHz

• Extended service set (ESS) with multiple APs in a house, with an ethernet distributed system (DS)– One AP at 2.4/5GHz covering the whole house, called central AP

– Multiple in-room AP/PCP at 60GHz, called secondary APs

• "Central" and "secondary" terms are introduced to indicate that:– Central AP is a repository for configuration parameters of the ESS

– Secondary APs can retrieve configuration parameters from the central AP

May 2010

Slide 3

doc.: IEEE 802.11-10/492r02


Central AP

Media server


WiFi 60GHz ( 1 Gbps)

WiFi 5GHz ( 500 Mbps)

Secondary AP

Ethernet connexion between APs

STA A

Step 1: STA A with an flow using 2.4/5GHz band to the central AP

(Green line)

May 2010

Slide 4

doc.: IEEE 802.11-10/492r02


central AP

Media server



Secondary AP

Ethernet connexion between APs

STA A

Step 2: STA A performs a FST/roaming between the central AP and the

secondary 60GHz AP, so that the selected flow could be transmitted via the

secondary AP and the ethernet link to the central AP, in a seamless way


May 2010

Slide 5

doc.: IEEE 802.11-10/492r02


How to make such a use case work?

• It seems that 11r is not sufficient to enable this use case– stream-based session transfer not possible– the fastness constraints may not be satisfied

• 11r combined with an extension of FST could be the solution.

• To make it seamless, it seems FST would require transparent mode with multiple endpoints (central AP to a secondary AP)– e.g. sharing of security, association, etc between central and secondary APs. – possible solution:

• distribute security and assocation parameters to allow auto-configuration of the secondary APs by the central AP.

• enable communications between central and secondary APs via the 2.4/5GHz backbone (AP to AP via action frames)

May 2010

Slide 6

doc.: IEEE 802.11-10/492r02



The use of 2.4/5GHz management to discover, assist training, and schedule 60GHz transmission is a solution to improve the performance of 802.11ad at larger range

May 2010

Slide 7Slide 7

AP

Wifi 60GHz ( 1 Gbps)

Media server

Wifi 5GHz ( 500 Mbps)

60G Link assisted by 2.4/5G

doc.: IEEE 802.11-10/492r02


• Beamforming would be the key technology to enhance 60GHz range

• However, beamforming could only be functional after discovery and training of the target device

• If 802.11a/b/g/n can coincide with 802.11ad, they can be used to better facilitate 60GHz beamforming

March 2010

Slide 8

2.4/5GHz Assisted 60GHz - Overview

doc.: IEEE 802.11-10/492r02


• Several ways to effectively use 2.4/5GHz frames to assist 60GHz operation were previously proposed in [4] – 2.4/5GHz Beaconing

• Provide 60GHz service discovery, especially when STAs are out of 60GHz omni range

• Share 60GHz Beacon Offset (i.e. TX timing) so STAs can discover when to update beamform information or retrain if necessary.

• Provide 60GHz Scheduling Information that can be used to adjust the RX/TX beam-pattern to the intended receiver/transmitter

– 2.4/5GHz Management Frames assisted 60GHz scheduling• Can facilitate better 60 GHz operation via some frames (e.g. Re-scheduling Frame)

• Communicate with all STAs in the BSS via 2.4/5GHz frames; single STA via 60GHz

– 2.4/5GHz Management Frames assisted 60GHz training• Aid between STAs whose 60GHz training information is not available or too aged

• Use frames to initiate 60GHz training procedure

Slide 9

2.4/5GHz Assisted 60GHz - Options

doc.: IEEE 802.11-10/492r02


• It will not be possible to cover entire home with a single 60GHz network

• 60 GHz should be used to provide intra-room ultra-fast connections.

In room 60 GHz improves the link reliability and the link robustness in the presence of interferences

• 2.4/5 GHz should be used to provide inter-room connections

• 2.4/5 GHz should be used as well as intra-room connections in case of mobility where a 60GHz link would not be maintained

Use case 3Backhaul at 2.4/5GHz, in-room 60GHz

Slide 10

doc.: IEEE 802.11-10/492r02


AP

Media server

60G P2P setup with 2.4/5G

Use case 3Backhaul at 2.4/5GHz, in-room 60GHz



Slide 11

doc.: IEEE 802.11-10/492r02


• Simple extension of TDLS

• 2.4/5 GHz manages setup procedure, and 60 GHz provides a multi-Gbps direct link

• Discovering TDLS capable STAs in the same BSS is easy because 2.4/5 GHz has a wider and omni directional range

AP

STA1STA2

DLS setup request

DLS setup response

2.4/5G60G

Direct link

2.4/5GHz DLS of 60GHz P2P

Slide 12

doc.: IEEE 802.11-10/492r02


• Device discovery and beamforming training could be started with 2.4/5GHz signaling.

60GHz

2.4/5GHz

60GHz

2.4/5GHz

60GHz

2.4/5GHz

AP

STA1

STA2

DLS setuprequest

DLS setuprequest

DLS setupresponse

DLS setupresponse

60GHzTrainingFrame

60GHzTraining

Feedback

Waiting forTrainingFrame

Beamformed Data

Waitingfor

Response

Setup signal flow of 60GHz P2P

Slide 13

doc.: IEEE 802.11-10/492r02


• Collaboration between the 2.4/5 and 60 GHz bands would enable user expectations for 802.11ad to be met

• Fast session transfer could enable stream-based "roaming".

• 2.4/5 GHz assisted 60 GHz improves discovery and assists training and scheduling of 60 GHz transmission

• 2.4/5 assisted DLS of 60 GHz permits 60 GHz to be used for in-room ultra-fast connections while 2.4/5 provides inter-room connections and manages 60 GHz links

• We believe that these solutions would improve the overall home network

Conclusions

May 2010

Slide 14Slide 14

doc.: IEEE 802.11-10/492r02


Reference

May 2010

Slide 15

• [1] J. Benko et al, “5-60 GHz use cases”, 802/11-09-0835r0

• [2] L. Cariou et al, “Fast Session Transfer use cases”, 802/11-10-0134r0

• [3] L. Cariou et al, “Fast Session Transfer”, 802/11-10-0491r1

• [4] Y. Morioka et al, “802.11ad New Technique Proposal”, 802/11-10-0259r2

Doc.: IEEE 802.11-10/492r02 Submission Orange Labs Date: 2010-05-19 Collaboration between 2.4/5 and...

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