Title: m Frame structure: better STC support Document Number: S802.16m-08/239 Date Submitted: March 12, 2008 Source: Mariana GoldhamerVoice: ALVARION 21a HaBarzel Street, Tel Aviv, Israel Venue: Session #54, March, 2008 Base Document: C802.16m-08/239 Purpose: Support the comments to the Frame Rapporteur Group output document Notice This document does not represent the agreed views of the IEEE Working Group or any of its subgroups. It represents only the views of the participants listed in the “Source(s)” field above. It is offered as a basis for discussion. It is not binding on the contributor(s), who reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: and. 7.html#6http://standards.ieee.org/guides/opman/sect6.html#6.3 Further information is located at and.

802.16m Frame structure: better STC support Mariana Goldhamer Alvarion

Achievements and targets for SDD Frame Structure in C802.16m/08-118r1 –The existing text addresses mainly the latency problem We did not address yet the spectral efficiency / coverage issues –Depending on the user position a different STC coding Matrix might be suitable Space-time coding is suitable for low SINR MIMO is suitable at high SINR Beam-forming may increase the cell size if we remove the single FCH/MAP “point-of-failure”

Target of this contribution Further Frame structure enhancement –The existing ZONE concept is enhanced to E-Zone A specific E-ZONE is related to both permutation type (in time domain) and STC processing type –Historically the permutation was more important, but STC has more influence on performance –Multiple parallel STC processing types possible from the start –Linked MCH for not-limited E-ZONE approach –SET concept is considered as “start point” –Harmonization with the multi-frame and sub-frame concepts

Solutions For the two main SETs: –Master SET for Reuse N –Reuse 1 Control/DATA SET Multiple starting E-ZONEs (STC) per SET, operating in parallel in frequency and beginning at the frame start –MCH needs to be transmitted using the suitable STC mode (Matrix type, etc.) –MCHs have well-known positions in the FRAME –Each MCH is transmitted with well-known modulation/coding/STC mode MCH content is similar with FCH content; additionally will indicate – where the E-Zones start E-Zone dimensions are in TTI and sub-channel domain E-Zone permutation can be chosen in a flexible mode –MCH in Slave SETs can be linked from frame to frame

Fixed MCH Locations

Properties of Fixed MCH locations Enjoy suitable preamble Can use the suitable STC type Well-known common permutation Can point to an E-ZONE with permutation change Can point to an E-ZONE in another SET –Data/Control after Broadcast –E-ZONES inside Slave SETs

Linked MCH Locations

Properties of the Linked MCH –An MCH can point to an MCH located in a future Frame –The linkage chain is reset at the start of the Multi- frame –The pointed to MCH can be used with the same or different permutation and STF mode Most suitable for Slave SETs Best suitable for low mobility users and Relays –The pointed to MCH can be located in another SET and can use a different Tx power density

Conclusion This proposal enhances the m Frame Structure with better support for the STC type suitable to each user, for increasing the spectral efficiency and cell size The proposal is fully compliant with the multi- frame, sub-frame and TTI approach Text for SSD – in the base contribution