doc IEEE 802 11 -10 492 r 02

doc. : IEEE 802. 11 -10/492 r 02 May 2010 Collaboration between 2. 4/5 and 60 GHz Authors: Orange Labs Submission Date: 2010 -05 -19

doc. : IEEE 802. 11 -10/492 r 02 May 2010 Abstract • 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. Orange Labs Submission Slide 2

doc. : IEEE 802. 11 -10/492 r 02 May 2010 Use case 1 2. 4/5 GHz Assisted 60 GHz • Extended service set (ESS) with multiple APs in a house, with an ethernet distributed system (DS) – One AP at 2. 4/5 GHz covering the whole house, called central AP – Multiple in-room AP/PCP at 60 GHz, 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 Orange Labs Submission Slide 3

doc. : IEEE 802. 11 -10/492 r 02 May 2010 Use case 1 2. 4/5 GHz Assisted 60 GHz Step 1: STA A with an flow using 2. 4/5 GHz band to the central AP (Green line) STA A Secondary AP Media server Central AP Ethernet connexion between APs Wi. Fi 5 GHz ( 500 Mbps) Wi. Fi 60 GHz ( 1 Gbps) Orange Labs Submission Slide 4

doc. : IEEE 802. 11 -10/492 r 02 May 2010 Use case 1 2. 4/5 GHz Assisted 60 GHz STA A Step 2: STA A performs a FST/roaming between the central AP and the secondary 60 GHz 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 Secondary AP Media server central AP Ethernet connexion between APs Wi. Fi 5 GHz ( 500 Mbps) Wi. Fi 60 GHz ( 1 Gbps) Orange Labs Submission Slide 5

doc. : IEEE 802. 11 -10/492 r 02 May 2010 How to make such a use case work? • It seems that 11 r is not sufficient to enable this use case – stream-based session transfer not possible – the fastness constraints may not be satisfied • 11 r 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. 4/5 GHz backbone (AP to AP via action frames) Orange Labs Submission Slide 6

doc. : IEEE 802. 11 -10/492 r 02 May 2010 Use case 2 2. 4/5 GHz Assisted 60 GHz The use of 2. 4/5 GHz management to discover, assist training, and schedule 60 GHz transmission is a solution to improve the performance of 802. 11 ad at larger range 60 G Link assisted by 2. 4/5 G Media server Wifi 60 GHz ( 1 Gbps) Wifi 5 GHz ( 500 Mbps) AP Orange Labs Submission Slide 7

doc. : IEEE 802. 11 -10/492 r 02 March 2010 2. 4/5 GHz Assisted 60 GHz - Overview • Beamforming would be the key technology to enhance 60 GHz range • However, beamforming could only be functional after discovery and training of the target device • If 802. 11 a/b/g/n can coincide with 802. 11 ad, they can be used to better facilitate 60 GHz beamforming Orange Labs Submission Slide 8

doc. : IEEE 802. 11 -10/492 r 02 2. 4/5 GHz Assisted 60 GHz - Options • Several ways to effectively use 2. 4/5 GHz frames to assist 60 GHz operation were previously proposed in [4] – 2. 4/5 GHz Beaconing • Provide 60 GHz service discovery, especially when STAs are out of 60 GHz omni range • Share 60 GHz Beacon Offset (i. e. TX timing) so STAs can discover when to update beamform information or retrain if necessary. • Provide 60 GHz Scheduling Information that can be used to adjust the RX/TX beampattern to the intended receiver/transmitter – 2. 4/5 GHz Management Frames assisted 60 GHz scheduling • Can facilitate better 60 GHz operation via some frames (e. g. Re-scheduling Frame) • Communicate with all STAs in the BSS via 2. 4/5 GHz frames; single STA via 60 GHz – 2. 4/5 GHz Management Frames assisted 60 GHz training • Aid between STAs whose 60 GHz training information is not available or too aged • Use frames to initiate 60 GHz training procedure Orange Labs Submission Slide 9

doc. : IEEE 802. 11 -10/492 r 02 Use case 3 Backhaul at 2. 4/5 GHz, in-room 60 GHz • It will not be possible to cover entire home with a single 60 GHz 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 60 GHz link would not be maintained Orange Labs Submission Slide 10

doc. : IEEE 802. 11 -10/492 r 02 Use case 3 Backhaul at 2. 4/5 GHz, in-room 60 GHz Media server 60 G P 2 P setup with 2. 4/5 G AP Wi. Fi 5 GHz ( 500 Mbps) Wi. Fi 60 GHz ( 1 Gbps) Orange Labs Submission Slide 11

doc. : IEEE 802. 11 -10/492 r 02 2. 4/5 GHz DLS of 60 GHz P 2 P • 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 2. 4/5 G 60 G DLS setup request DLS setup response STA 1 Orange Labs Submission STA 2 Direct link Slide 12

doc. : IEEE 802. 11 -10/492 r 02 Setup signal flow of 60 GHz P 2 P • Device discovery and beamforming training could be started with 2. 4/5 GHz signaling. DLS setup response DLS setup request AP 2. 4/5 GHz 60 GHz Waiting 60 GHz for Training Frame Response STA 1 2. 4/5 GHz 60 GHz DLS setup request STA 2 2. 4/5 GHz 60 GHz DLS setup response Orange Labs Submission Waiting for 60 GHz Training Frame Feedback Slide 13 Beamformed Data

doc. : IEEE 802. 11 -10/492 r 02 May 2010 Conclusions • Collaboration between the 2. 4/5 and 60 GHz bands would enable user expectations for 802. 11 ad 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 Orange Labs Submission Slide 14

doc. : IEEE 802. 11 -10/492 r 02 May 2010 Reference • [1] J. Benko et al, “ 5 -60 GHz use cases”, 802/11 -09 -0835 r 0 • [2] L. Cariou et al, “Fast Session Transfer use cases”, 802/1110 -0134 r 0 • [3] L. Cariou et al, “Fast Session Transfer”, 802/11 -10 -0491 r 1 • [4] Y. Morioka et al, “ 802. 11 ad New Technique Proposal”, 802/11 -10 -0259 r 2 Orange Labs Submission Slide 15