Basic TGad MAC Layer Proposals and Options for Coexistence January 2010 doc.: IEEE 802.11-xx/xxx1r0 Basic TGad MAC Layer Proposals and Options for Coexistence Date: 2010-03-15 Authors: Name Affiliations Address Phone email David Tung Chong Wong Institute for Infocomm Research (I2R), A*STAR 1 Fusionopolis Way, #21-01 Connexis, Singapore 65-6408-2258 wongtc@i2r.a-star.edu.sg Xiaoming Peng I2R, A*STAR Same as above 65-6408-2429 pengxm@i2r.a-star.edu.sg Francois Chin 65-6408-2530 chinfrancois@i2r.a-star.edu.sg Xuhong Qu 65-6408-2477 quxh@i2r.a-star.edu.sg Raymond Jararaj s/o Jayabal 65-6408-2226 jraymond@i2r.a-star.edu.sg David Wong, I2R

January 2010 doc.: IEEE 802.11-xx/xxx1r0 Abstract We propose two MAC layer beacon interval structures for Infrastructure BSS operations and Ad Hoc IBSS (or PBSS) operations. We add options for coexistence between TGad network and another 60 GHz network. Allow the TGad network to detect the other 60 GHz network. Our scenario covers the case when both TGad network and another network are in operations and the other network move into the vicinity of the TGad network. The other scenario which covers the case when the TGad network starts up in the vicinity of the other network is proposed in IEEE 802.11-09/1160r3. David Wong, I2R

Infrastructure BSS AP Stations Sector 1 Sector 2 Sector 3 Sector n January 2010 doc.: IEEE 802.11-xx/xxx1r0 Infrastructure BSS AP Stations Sector 1 Sector 2 Sector 3 Sector n AP with stations having n directions David Wong, I2R

TGad MAC Layer Beacon Interval Structure 1 January 2010 doc.: IEEE 802.11-xx/xxx1r0 TGad MAC Layer Beacon Interval Structure 1 … Beacon interval n-1 Beacon interval n Beacon interval n+1 … Quasi-omni Beacon Period Association CP (A-CP) CFP and regular sub-CP (RS-CP) in Direction #1 … CFP and regular sub-CP (RS-CP) in Direction #n Dir. #1 … Dir. #n AS-CP for Dir. #1 … AS-CP for Dir. #n CFP for Dir. #1 RS-CP for Dir. #1 … CFP for Dir. #n RS-CP for Dir. #n Can also have alternating RS-CPs and RS-CAPs using directional EDCA and HCCA MACs, respectively Can also have alternating RS-CPs and RS-CAPs using directional EDCA and HCCA MACs, respectively Association Sub-CPs Broadcast and multicast frames Broadcast and multicast frames RS-CP for Dir. #1 – using directional CSMA/CA EDCA MAC RS-CAP for Dir. #1 - using directional HCCA MAC … RS-CP for Dir. #n – using directional CSMA/CA EDCA MAC RS-CAP for Dir. #n - using directional HCCA MAC … Regular sub-CP(s) with EDCA-TXOPs and Regular sub-CAP(s) with HCCA-TXOPs Regular sub-CP(s) with EDCA-TXOPs and Regular sub-CAP(s) with HCCA-TXOPs David Wong, I2R

January 2010 doc.: IEEE 802.11-xx/xxx1r0 Beacon Period In the beacon, it is divided into three sections: quasi-omni beacon section, AP quasi-omni tracking section and sector training section. In the first section, beaconing is supported by transmitting the beacon frame in the different directions. Direction refers to an antenna direction or an array pattern. The second section allows devices in the infrastructure BSS to track the AP quasi-omni directions. The third section enables pro-active beam forming. David Wong, I2R

January 2010 doc.: IEEE 802.11-xx/xxx1r0 A-CP / CFPs / RS-CPs The association contention period (A-CP) is used for devices to send association request commands to the AP. The contention-free periods (CFPs) are used for broadcast or multicast packets. The regular sub-contention periods (RS-CPs) are used for all other commands and data exchanges. The CFPs and RS-CPs are divided according to the different directions. For the CFPs after the A-CP, broadcast and multicast frames can be transmitted directionally. David Wong, I2R

January 2010 doc.: IEEE 802.11-xx/xxx1r0 CFP / RS-CPs Transmission in the RS-CP is done using CSMA/CA in a directional manner, similar to IEEE 802.11e enhanced distributed channel access (EDCA) MAC with four access categories, and there is a period before the end of the RS-CP that must be considered before transmitting a packet. For the regular sub-contention periods (RS-CPs), a directional EDCA CSMA/CA MAC can be used. For the CFP at the end of the beacon interval, a polling MAC like HCF controlled channel access (HCCA) can be used directionally. David Wong, I2R

TGad MAC Layer Beacon Interval Structure 2 January 2010 doc.: IEEE 802.11-xx/xxx1r0 TGad MAC Layer Beacon Interval Structure 2 … Beacon interval n-1 Beacon interval n Beacon interval n+1 … Quasi-omni Beacon Period Contention Period (Any Directional CSMA/CA MAC) Dir. #1 … Dir. #n *Any of the directional CSMA/CA MAC in IEEE 802.11-09/0796r0 can be used in the contention period. David Wong, I2R

Options for Coexistence in Structure 1 January 2010 doc.: IEEE 802.11-xx/xxx1r0 Options for Coexistence in Structure 1 Quasi-omni Beacon Period CFP and regular sub-CP (RS-CP) in Direction #1 Association CP (A-CP) Beacon interval n Beacon interval n+1 Beacon interval n-1 … Dir. #1 Dir. #n RS-CAP for Dir. #1 - using directional HCCA MAC AS-CP for Dir. #1 AS-CP for Dir. #n RS-CP for Dir. #1 – using directional CSMA/CA EDCA MAC Association Sub-CPs CFP and regular sub-CP (RS-CP) in Direction #n RS-CP for Dir. #n – using directional CSMA/CA EDCA MAC RS-CAP for Dir. #n - using directional HCCA MAC RS-CP for Dir. #1 CFP for Dir. #1 CFP for Dir. #n RS-CP for Dir. #n Regular sub-CP(s) with EDCA-TXOPs and Regular sub-CAP(s) with HCCA-TXOPs Broadcast and multicast frames Can also have alternating RS- CPs and RS-CAPs using directional EDCA and HCCA MACs, respectively. Can also have alternating RS-CPs and RS-CAPs using directional EDCA and HCCA MACs, respectively. Station #1 sensingreport Quasi-omni Quiet Period Quasi-omni Reporting Period Station #m sensingreport Mini-slots for sensing reports by all stations in direction #1. David Wong, I2R

Collaborative Multi-direction Sensing January 2010 doc.: IEEE 802.11-xx/xxx1r0 Collaborative Multi-direction Sensing Example of the directions of each station for collaborative multi-direction sensing in the quiet period David Wong, I2R

Main Additions for Coexistence (1/3) January 2010 doc.: IEEE 802.11-xx/xxx1r0 Main Additions for Coexistence (1/3) The main additions to the MAC layer beacon interval structure are the quasi-omni quiet period and the quasi-omni reporting period. There are multi-quiet periods in the different directions for the AP and stations to sense for the other 60 GHz network, for examples, IEEE 802.15.3c or ECMA-387 network. Each sub-quiet period is used by the AP or station to sense for the other network in their particular direction out of the n possible directions. Note that the initial direction of sensing by each station should be in such a way that all stations in that sector cover different directions. David Wong, I2R

Main Additions for Coexistence (2/3) January 2010 doc.: IEEE 802.11-xx/xxx1r0 Main Additions for Coexistence (2/3) This can be assigned to the station by the AP when it associates with the AP. Another way is to use the station’s MAC address and compute it, that is, (MAC address MOD n). Thus, the AP and the stations are sensing collaboratively in multiple directions as whole during the quiet period. There are also multiple mini-slots in the different directions for the stations to report their sensing outcomes. David Wong, I2R

Main Additions for Coexistence (3/3) January 2010 doc.: IEEE 802.11-xx/xxx1r0 Main Additions for Coexistence (3/3) The mini-slots in different direction can be dynamically assigned to stations by the AP when the stations associate with the AP in the A-CP and indicated in a new field in the quasi-omni beacon period in that direction. The particular mini-slot for a station will be removed when the station disassociates from the AP. The AP decides if the other 60 GHz network is present or not, based on the data fusion rules like OR-fusion rule, AND-fusion rule or Majority fusion rule. David Wong, I2R

Alternate Option for Coexistence in Structure 1 January 2010 doc.: IEEE 802.11-xx/xxx1r0 Alternate Option for Coexistence in Structure 1 … Beacon interval n-1 Beacon interval n Beacon interval n+1 … Quasi-omni Beacon Period Quasi-omni Quiet Period Association CP (A-CP) CFP and regular sub-CP (RS-CP) in Direction #1 … CFP and regular sub-CP (RS-CP) in Direction #n Dir. #1 … Dir. #n Dir. #1 … Dir. #n AS-CP for Dir. #1 … AS-CP for Dir. #n CFP for Dir. #1 RS-CP for Dir. #1 … CFP for Dir. #n RS-CP for Dir. #n Association Sub-CPs Can also have alternating RS- CPs and RS-CAPs using directional EDCA and HCCA MACs, respectively. Can also have alternating RS-CPs and RS-CAPs using directional EDCA and HCCA MACs, respectively. Broadcast and multicast frames Broadcast and multicast frames RS-CP for Dir. #1 – using directional CSMA/CA EDCA MAC RS-CAP for Dir. #1 - using directional HCCA MAC … RS-CP for Dir. #n – using directional CSMA/CA EDCA MAC RS-CAP for Dir. #n - using directional HCCA MAC … Regular sub-CP(s) with EDCA-TXOPs and Regular sub-CAP(s) with HCCA-TXOPs Regular sub-CP(s) with EDCA-TXOPs and Regular sub-CAP(s) with HCCA-TXOPs David Wong, I2R

Main Additions in the Alternate Option January 2010 doc.: IEEE 802.11-xx/xxx1r0 Main Additions in the Alternate Option The only addition to the MAC layer beacon interval structure is the quasi-omni quiet period. There are multi-quiet periods in the different directions for the AP and stations to sense for the other 60 GHz network as before. However, the stations can report their sensing outcomes to the AP through directional EDCA MAC using CSMA/CA or through directional HCCA MAC in the RS-CAPs for different directions. The stations can also send the sensing reports to the AP using directional EDCA MAC in option 2 using high priority like short AIFS and small contention window sizes. The AP then decides if the other 60 GHz network is present or not, based on the data fusion rules. David Wong, I2R

Options for Coexistence in Structure 2 January 2010 doc.: IEEE 802.11-xx/xxx1r0 Options for Coexistence in Structure 2 … Beacon interval n-1 Beacon interval n Beacon interval n+1 … Quasi-omni Beacon Period Quasi-omni Quiet Period Quasi-omni Reporting Period Contention Period (Any Directional CSMA/CA MAC) Dir. #1 … Dir. #n Dir. #1 … Dir. #n Dir. #1 … Dir. #n This option is similar to the coexistence in MAC structure 1, except that the association and setting up of the mini-slot for sensing reporting is done in the contention period using any directional CSMA/CA MAC as in IEEE 802.11-09/0796r0. Station #1 sensingreport … Station #m sensingreport Mini-slots for sensing reports by all stations in direction #1. David Wong, I2R

Alternate Option for Coexistence in Structure 2 January 2010 doc.: IEEE 802.11-xx/xxx1r0 Alternate Option for Coexistence in Structure 2 … Beacon interval n-1 Beacon interval n Beacon interval n+1 … Quasi-omni Beacon Period Quasi-omni Quiet Period Contention Period (Any Directional CSMA/CA MAC) Dir. #1 … Dir. #n Dir. #1 … Dir. #n Similarly, this option is similar to the alternate option for coexistence in MAC structure 1, except that data communication and sensing report by the stations to the AP or the station that sends out the beacon target transmission time (TBTT) are done in the contention period using any directional CSMA/CA MAC as in IEEE 802.11-09/0796r0. David Wong, I2R

January 2010 doc.: IEEE 802.11-xx/xxx1r0 Summary We propose two MAC layer beacon interval structures for Infrastructure BSS operations and Ad Hoc IBSS (PBSS) operations. We add options for coexistence with another 60 GHz network by detecting it. The TGad network could then move to another band. The options for coexistence cater for the case when the TGad network and another 60 GHz network, both in operations, come into contact. These coexistence options can be used in every beacon interval, or once in a number of beacon intervals. David Wong, I2R

January 2010 doc.: IEEE 802.11-xx/xxx1r0 References 11-09-1160-03-00ad-proposed-evaluation methodology-additions 11-09-0796-00-00contention-based directional MAC protocols: a survey IEEE Std 802.15.3c™-2009 ECMA-387 David Wong, I2R

January 2010 doc.: IEEE 802.11-xx/xxx1r0 Straw Poll Do you support inclusion of the technique,     - Options for coexistence as described in 10/0249r0 in the TGad draft amendment? Y: N: A: Slide 20 David Wong, I2R