S802.16m-08/433r1
Flexible pilot pattern with configurable pilot reuse factor for DL
IEEE 802.16 Presentation Submission Template (Rev. 9)
Document Number: IEEE S80216m-08/433r1
Date Submitted: 2008-05-13
Source:
Dong LI, Hongwei YANG, Liyu CAI, Keying WU, Yang SONG
Alcatel Shanghai Bell Co., Ltd
Voice: +86-21-58541240 Ext. 7796
E-mail:
Hongwei.yang@alcatel-sbell.com.cn
*<http://standards.ieee.org/faqs/affiliationFAQ.html>
Venue:
IEEE session #55, Macao
Base Contribution:
IEEE C80216m-08/433r1
Purpose:
For 802.16m discussion, and adoption into the C80216DL PHY-08_046
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Motivation
• Most of the pilot designs in the DL PHY
rapporteur group focus on the single-BS
transmission. It should be extended to multi-BS
MIMO, if multi-BS MIMO shows significant
benefits.
• This contribution provides a solution to support
multi-BS MIMO.
Proposed solutions
• Flexible pilot pattern with configurable pilot
reuse factor
– Through configurable pilot reuse factor, adjacent
configured number of BSs can transmit orthogonal
pilot signals, thus enabling MS to estimate the
channels between each BS and the MS.
– The configurable pilot reuse factor information can
be incorporated into the relevant transmission zone
definition signaling.
Illustration of pilot patter examples with
pilot reuse factors
Pilot reuse
factor = 3
P0
P2
P3
P0
P3
P1
P2
P0
P2
P3
P0
P3
P1
P2
P2
P3
P2
P2
P1
P0
P3
P1
P1
Pilot patterns for the first BS
P1
P0
P3
P3
P0
Pilot patterns for the first BS
P2
P1
P2
P3
P0
P3
P3
P0
P1
P0
P2
P3
P2
P1
P1
P0
P0
P1
P2
P1
Pilot patterns for the second BS
Pilot patterns for the third BS
Pilot reuse
factor = 2
Pilot patterns for the second BS
The concept of pilot reuse factors can be
adapted to other pilot patterns straightforwardly.
Text Proposal
11.5.3 Pilot structure
[supplement one sentence after the existing content
about pilot structure as follows]
The pilot patterns shall be extended to support
multi-BS MIMO through orthogonal pilot
multiplexing among the involved BSs.