====== 2008 02 05 ======

====== Brain storming with Stephanie, Marc and Laurent ======

===== Topics =====
* Cooperation sector and BS
* SFN and  interference management
* SU-MIMO
* MU-MIMO

===== Contacts =====
MDB: Jeff.Zhuang
Labs: Bill Hillery, Fred Vook
Network: Fan Wang, Bishwarup Mondal

===== Already done =====
* Sphere Encoder
* Block diagonalization
* User pairing UL (P&L)
* User pairing DL (TT)

===== Impacts =====
* Channel estimation
* Pilot format

====== Phone call with Fred Vook, Tim Thomas, Kevin Baum, Marc Kudac and others ======

===== System description document (SDD) - call for contribs =====
* Pilot structure as relevant to DL MIMO
* DL control structures
* DL physical resource allocation unit

===== Frame structure rapporteur group =====
* Ask Mark Kudac
* Develop proposed baseline content regarding frame structure suitable for use in the 802.16m SDD
* Contribs by 10/3/8

===== UL access techniques rapporteur group =====
* ??
* Develop a report on the advantages and disadvantages of various non-MIMO uplink access techniques to submit as a Task Group contribution
* Contribs by 10/3/8

===== Q&A =====
* Which band is used? 20MHz implies SFN!
	* Interference management?
	* Coverage range capacity
	* Single cell MIMO technique
	=> Will be 131 or 111
	=> Both AMC () and PUSC (diversity mode)
	=> Cooperation idea
		* Think about BS coordination?
	=> instead of AMC of PUSC, tiles are spread on OFDMA symbols
	=> latency will be a big deal
		* Coordination scheduling?
		* Locate user and apply isolation by partial frequency scheduling
	* 16e does not have any interface for BS coordination such as X2 in LTE.
	* No way for quick signaling
		* MAC layer?
		* 16g for network management
		* in UMB, the signaling goes toward the mobile (LTE equivalent de 3GPP2) .

* Do we touch SE instead of BD?
	=> benchmark them, channel estimate, velocity
	=> what the need for signaling?

=> Wimax 1.x will only use MIMO from 16m standard

===== Keep unanswered =====

* Antenna correlation?
* UP link sounding use only one stream?

===== Consensus =====
* Band-AMC or kind of distributed tiles
* 131 deployment with static frequency repartition to get orthogonality between BS to solve interferences
* Single cell frame structure

- Tim works on link level simulations
- Bill works on system level simulations

* Linear techniques: block-diagonalization
* Non-linear techniques: sphere encoder