Re: [STDS-802-16] [MMR-AH-UM] Cooperative relaying addition to Section 5.3 - " Types of Routes" in C80216j%2d06_UMAHtemp_r 2.doc.
The issue of soft handover and cooperative relay is on the list of items to discuss in tomorrow's meeting.
I've posted David's input to the following location in the temp directory:
http://dot16.org/CSUpload//upload/temp_db/C80216j%2d06UMAHtemp_DS_input.ppt
I gave it the title "Topoloyg diagram for 802.16j Ad Hoc on Usage Models Harmonized Contribution Working Document"
Jerry
-----Original Message-----
From: David Steer [mailto:crm367@nortel.com]
Sent: Monday, June 05, 2006 1:16 PM
To: STDS-802-16@listserv.ieee.org; Sydir, Jerry
Cc: Peiying Zhu; Gang.A.Shen@ALCATEL-SBELL.COM.CN; Mattyl@WINETWORKS.COM
Subject: RE: [MMR-AH-UM] Cooperative relaying addition to Section 5.3 - " Types of Routes" in C80216j%2d06_UMAHtemp_r 2.doc.
Hi MMR-AH-UM people
Attached is a possible topology diagram showing MS with "cooperative relaying" or "handover" links.
I have added two lines - one showing the MS possibly communicating with both the MMR-BS and FRS-NRS (i.e. a relay and its associated BS) and another showing the MS possibly communicating with two different RS that are associated with the same MMR-BS.
There is (at least) one other case in which the two RS are associated with different MMR-BS (this example can't be shown on this diagram as it only shows a single MMR-BS).
I can't post drawing this directly to the group, so perhaps Jerry could put it on the server so others can see it for use in discussion before or during the meeting on Thursday?
David Steer
-----Original Message-----
From: Zhu, Peiying [CAR:RA10:EXCH]
Sent: Monday, June 05, 2006 10:39 AM
To: STDS-802-16@listserv.ieee.org
Subject: Re: [STDS-802-16] ??: [STDS-802-16] [MMR-AH-UM] Coope rative relaying addition to Section 5.3 - " Types of Routes" in C80216j%2d06_UMAHtemp_r 2.doc.
Dear Matty and Gang:
I believe we discussed this issue during the last ad-hoc meeting and was agreed to update the topology diagram to include this case. I believe David Steer from Nortel took the action to update the diagram.
Regards,
Peiying
-----Original Message-----
From: CTO Shen Gang [mailto:Gang.A.Shen@ALCATEL-SBELL.COM.CN]
Sent: Sunday, June 04, 2006 10:17 PM
To: STDS-802-16@listserv.ieee.org
Subject: [STDS-802-16] ??: [STDS-802-16] [MMR-AH-UM] Coope rative relaying addition to Section 5.3 - " Types of Routes" in C80216j%2d06_UMAHtemp_r 2.doc.
Dear Matty and all,
I agree Matty’s suggestion to add cooperative relaying to the discussion. In the cooperative relay, copies of the same data are retransmitted from multiple RSs simultaneously for diversity gain, or different packets or different parts of the same packet are relayed from several RSs simultaneously for multiplexing gain. RS deployment gives some benefits to cooperative gain. One of implementation method of cooperative relay may be macroscopic MIMO. Synchronization among RSs are one of key challenges in RS cooperation.
Best Regards,
Gang Shen
-----原始邮件-----
发件人: Matty Levanda [mailto:Mattyl@WINETWORKS.COM]
发送时间: 2006年6月4日 17:04
收件人: STDS-802-16@listserv.ieee.org
主题: [STDS-802-16] [MMR-AH-UM] Cooperative relaying addition to Section 5.3 - "Types of Routes" in C80216j%2d06_UMAHtemp_r2.doc.
Dear all,
I suggest adding cooperative relaying to the rout type discussion in the Usage Model document. That is, when more than one RS are transmitting the same data to a MS. The MS may be aware of this (they appear like more than one BS antenna to the MS, much like Tx antenna diversity used at the BS) or unaware (if the RS send the same waveforms so they appear like one BS antenna to the MS). Cooperative relaying is different than "redundant routes" and has the resilience built into it.
It is expected that in areas with coverage problems due to many shadows (e.g., in and between buildings) RS deployment needs to be dense and as a result coverage areas will greatly overlap (in the unshadowed areas). This high percentage of fringed areas decreases the capacity and throughput of the system. The way to overcome this is by making groups of relays to cooperate during all or part of the downlink portion of the frame.
Matty