Transcript IEEE C802.16m-08/1111r1

Band segmentation for S-BCH to increase cell coverage
Document Number: IEEE C802.16m-08/1111r1
Date Submitted: 2008-09-05
Source:
Bin-Chul Ihm, Youngsoo Yuk, Sunam Kim and Jeongki Kim Voice:
LG Electronics
+82-31-450-7187
E-mail:
{bcihm, sixs, snkim816,chegal}@lge.com
*<http://standards.ieee.org/faqs/affiliationFAQ.html>
Venue: PHY: Text, in response to the TGm call for comments 802.16m-08/033 for session 57, Specific Topics “11.7 Downlink Control
Structure”
Base Contribution: None
Purpose:
Discussion and approval by TGm for the 802.16m SDD
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 >.
Robust transmission of SBCH

Since the SDD describes that SBCH carries essential system
parameters and system configuration information, SBCH shall be
transmitted very robust to satisfy the cell coverage requirement.

SBCH carries sector specific information

Two alternatives for robust transmission of sector specific SBCH


QPSK 1/N without band segmentation
QPSK 3/N with 3 bands segmentation, each of which has 4.7dB boosted
power per tone
Sector #1
Sector #2
Sector #3
Sector #1
Sector #2
Sector #3
vs
RBs used for SBCH
RBs used for data
RBs used for Null Tx
Simulation Assumption
Parameters
Value
Cell
19 cell (3sector/cell) wrap around
ISD
0.5Km, 1.5Km
BW
5MHz
Sub-channel
Localized mode
ITU PedB 3km/h
Channel model
ITU VehA 120Km/h
Mand-mixed
(PedB 3km/h(60%), VehA 30Km/h(30%) VehA 120Km/h(10%)
Antenna
configuration
Tx scheme
MIMO scheme
2 Tx antennas of 4 lambda spacing with AoD based spatial correlation
2 Rx antennas
Turbo code 1/4 QPSK w/ segmentation
Turbo code 1/12 QPSK w/o segmentation
SFBC
Simulation Results

Coverage @ 0.5Km ISD
Segmentation
100%
98.16%
96.58%

95%

Non-segmentation
97.54%
Observations
96.93%
93.95%
92.11%

90%
85%
80%
PedB 3Km/h

MAND-MIXED
VehA 120Km/h
Coverage @ 1.5Km ISD
Segmentation
100%
97.89%
96.05%
95%
Non-segmentation
96.93%
96.32%
93.60%
91.67%
90%
85%
80%
PedB 3Km/h
MAND-MIX ED
VehA 120Km/h
Coverage means the
portion of users in a sector
experiencing lower than
1% PER.
Bands segmentation
provides 1.5%~4.8%
coverage increase
Text Proposals
[Add the following text at the end of 11.7.2.2.5 Resource allocation
in page 61]
Predetermined N PRUs in the first subframe within a superframe are used
for transmission of SBCH. SBCH in each sector is transmitted through
sector specific PRUs among these N PRUs. The remaining PRUs not used
for transmission of SBCH does not transmit any signal.