Two-hop Operation to Relay Packets between Two TDC Links IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE S802.16n-11/0241 Date Submitted: 2011-11-07 Source: Sungcheol Chang, Seokki Kim, Eunkyung Kim, Miyoung Yun, Won-Ik Kim, E-mail: scchang@etri.re.kr Sungkyung Kim, Hyun Lee, Chulsik Yoon, Kwangjae Lim ETRI Venue: Call for Comments on the 802.16.1a Draft AWD <80216n-11_0025> Base Contribution: IEEE C802.16n-11/0241 Purpose: To be discussed and adopted by TG802.16n Notice: This document does not represent the agreed views of the IEEE 802.16 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 802.16. Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: <http://standards.ieee.org/guides/bylaws/sect6-7.html#6> and <http://standards.ieee.org/guides/opman/sect6.html#6.3>. Further information is located at <http://standards.ieee.org/board/pat/pat-material.html> and <http://standards.ieee.org/board/pat >.

This contribution provides two-hop operation of TDC Introduction 802.16n SRD describes two-hop operations of MS to MS direct communication But, 802.16.1a Draft AWD does not contain two-hop operation of talk-around direct communication(TDC). This contribution provides two-hop operation of TDC

Two-hop Operations of TDC Relaying packets on a unicast TDC link An originating HR-MS sends packets on a TDC link A terminating HR-MS receives packets on other TDC link A Relaying HR-MS receives the packets from the originating HR-MS and sends the packets to the terminating HR-MS.

Two-hop Operations of TDC Advertising a relaying HR-MS Relaying HR-MS broadcasts AAI-DC-RELAY-ADV message periodically All HR-MSs receives the message Establishing a relaying TDC link An HR-MS selects a relaying HR-MS for establishment of a relaying TDC link The HR-MS requests the relaying HR-MS to establish a relaying TDC link using AAI-DC-RELAY-REQ/RSP messages. The relaying HR-MS establishes the relaying TDC link to target HR-MS using AAI-DC-LEST-REQ/RSP messages.

Two-hop Operations of TDC Relaying packets on a multicast TDC link An originating HR-MS sends packets on a TDC link Terminating HR-MSs receive packets on other TDC link A Relaying HR-MS receives the packets from the originating HR-MS and sends the packets to the terminating HR-MSs. This provides a fixed service coverage Terminating HR-MSs are Rx MSs

Two-hop Operations of TDC Token management for PTT (1:N) application If MS1 finishes sending packets, it pass the PTT token using AAI-DC-TKN-HO. Relaying MS broadcasts token status using AAI-DC-TKN-ADV MS2 requests the PTT token using AAI-DC-TKN-REQ/RSP Relaying MS pass the PTT token to MS2 using AAI-TKN-HO

Proposed text for 16.1a AWD See IEEE C802.16n-11/0241.doc Remedy1 for AWD texts of two-hop operations Advertising a relaying HR-MS Two links management Token management Remedy2 to add details of MAC messages AAI-DC-RELAY-ADV AAI-DC-RELAY-REQ AAI-DC-RELAY-RSP