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K W 8W 0n: 8U b < * Q $ 0 < d l 8 K K 8 [ \ | e ] d x] [ [ [ e d [ [ [ ` ` ` ` " ! D " D & : H 2 2 2 2 2 2 ProjectIEEE 802.16 Broadband Wireless Access Working Group < HYPERLINK "http://ieee802.org/16"http://ieee802.org/16>TitleProposal for Full Duplex RelayDate Submitted2008-05-15Source(s)Takki Yu, Seung Hee Han, Sungyoon Jung, Jungje Son,Youngbin Chang, Hyunjeong KangSamsung Electronics Co., Ltd. Korea
Rakesh Taori
Samsung Advanced Institute of Technology, Korea
Voice: +82 31 279 4978E-mail: HYPERLINK "mailto:tk.yu@samsung.com" tk.yu@samsung.com sh0506.han@samsung.com jungje.son@samsung.com
E-mail: HYPERLINK "mailto:rakesh.taori@samsung.com" rakesh.taori@samsung.com
Re:LB#28cAbstractThis contribution proposes to include the full duplex relaying as one of the possible options in 802.16j standard.PurposeAccept proposed changes into IEEE P802.16j/D4NoticeThis 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.ReleaseThe 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 IEEEs name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEEs 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 PolicyThe contributor is familiar with the IEEE-SA Patent Policy and Procedures:
< HYPERLINK "http://standards.ieee.org/guides/bylaws/sect6-7.html" \l "6" http://standards.ieee.org/guides/bylaws/sect6-7.html#6> and < HYPERLINK "http://standards.ieee.org/guides/opman/sect6.html" \l "6.3" http://standards.ieee.org/guides/opman/sect6.html#6.3>.
Further information is located at < HYPERLINK "http://standards.ieee.org/board/pat/pat-material.html" http://standards.ieee.org/board/pat/pat-material.html> and < HYPERLINK "http://standards.ieee.org/board/pat" http://standards.ieee.org/board/pat>.Proposal for Full Duplex Relay
Takki Yu, Seung Hee Han, Sungyoon Jung, Jungje Son, Youngbin Chang, Hyunjeong Kang
Samsung Electronics
,Rakesh Taori
Samsung Advanced Institute of Technology
Introduction
Full duplex relay station can transmit and receive simultaneously in a single frequency band leading to the following advantages:
Potential reduction in spectral efficiency loss : re-utilizes BS-RS link resources as RS-MS link resources
Reduced overhead : no need for R-TTG and R-RTG, relay amble, and duplicated broadcasting information
No loss in uplink coverage : an MS can send data over the whole UL frame to increase uplink coverage
However, full duplex relaying is not defined as relaying mechanism in the current draft. A full duplex relay station can be readily used in some of the usage models of 802.16j as shown in Figure 1. In the usage models such as underground and coverage hole where sufficient level of isolation between relay transmit and receive antennas is likely to be present, we can exploit the benefits of full duplex relaying.
This contribution proposes that full duplex relaying be included as one of the possible options in the 802.16j standard. Details of the operation and the corresponding text for inclusion in the draft is provided here.
Figure 1. Usage model of full duplex
Overall description on Full duplex relaying
We suggest that the following definitions be included :
* Full duplex relaying (FDR) : a capability of communicating with the superordinate station and subordinate station(s) simultaneously, on the same carrier frequency.
* Full duplex RS: a non-transparent relay station capable of full duplex relaying.
Communication with a superordinate station and subordinate station(s) is performed using two different antenna sets where one of the antenna set is used for communicating with the superordinate station while at the same time the other antenna set is used for communicating with the subordinate station(s). FDR operation may cause interference from relay transmit antenna set to relay receive antenna set because it receives and transmits simultaneously using the same time/frequency resources. Hence, in order to achieve benefits from full duplex relay, a certain degree of isolation might be needed between the relay transmit and receive antenna sets. In some usage models, because of the nature of the usage scenario, sufficient levels of isolation may be available. For example, FDR may be an efficient relay solution to the underground usage model by locating the antenna communicating with BS outside and antenna communicating with MSs inside.
Figure 2 shows the high-level frame structure of full duplex relay for a two-hop case. The approach to the frame structure is same as that in [2], which preserves the consistency with the current frame structure except simultaneous operation of transmitting and receiving on the same carrier.
EMBED Visio.Drawing.11
Figure 2. Tx/Rx configuration of FDR in case of two hop frame structure
Full duplex RS frame structure
The frame structure of full duplex RS is shown in Figure 3. The first and second antenna sets operate on the same carrier frequency.
EMBED Visio.Drawing.11
Figure 3. An example of frame structure for full duplex RS.
Network entry Capability negotiation
An RS having a capability of full duplex relaying can inform the MR-BS during network entry using SBC negotiation.
Reference:
[1] IEEE P802.16j/D4 April 2008
[2] IEEE C802.16j-08/079r1 Out-of-band relay clarification March 2008
Proposed changes to the draft
Change part of the subclause 1.6 (line 5-13, page 3) as indicated:
1.6 Multihop relay
A transparent RS communicates with the superordinate station and subordinate station(s) using the same carrier frequency. A non-transparent RS may communicate with the superordinate station and subordinate station(s) using the same or different carrier frequencies. The former case is useful if a single frequency network is being deployed. The latter is useful if multiple carrier frequencies are being used in a network. In the case of separate carrier frequencies being used, the non-transparent RS can either be a single radio RS, where time division and carrier frequency switching is used to enable communication with the superordinate station and subordinate station(s), or it can be a dual radio RS, where simultaneous communication with the superordinate station and subordinate station(s) is possible.
Insert new definition 3.125, 3.126, 3.127, 3.128: