Self-Coexistence Mechanism Requirement in 802.16n
Document Number:
IEEE C802.16n-10/0075
Date Submitted:
2011-01-12
Source:
Ming-Tuo Zhou, Masayuki Oodo
Xin Zhang, (Alina) Liru Lu,
Hiroshi Harada
NICT
E-mail:
mingtuo@nict.com.sg; moodo@nict.go.jp;
zhangxin@nict.com.sg; liru@nict.com.sg;
harada@nict.go.jp
*<http://standards.ieee.org/faqs/affiliationFAQ.html>
Re:
CfC: IEEE P802.16n SRD in GRIDMAN TG
Base Contribution:
IEEE 802.16n-10/0066r2
Purpose:
To be discussed by TG802.16n
Notice:
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Abstract
• This presentation provides supporting
materials to a new requirement of Coexistence
Mechanism proposed for IEEE 802.16n in
IEEE C80216_10/0066r2
Definition of Coexistence
• Definition of coexistence
– “3.136 Coexistence: A state of acceptable co-channel
and/or adjacent channel operation of two or more radio
systems (possibly using different wireless access
technologies) within the same geographical area.” [1]
– Self-coexistence: Coexistence with other systems of the
same type.
Why 802.22 Needs Self-Coexistence
<An Example>
• The following text is from [2]. It shows 802.22 needs self-coexistence
because of possible mutual interference among multiple 802.22 systems.
• Particularly, 802.22 operates in TV band that has relatively long
interference range, self-coexistence is required to avoid interference.
[2]
Why 802.16n needs Self-coexistence?
<Operation Frequencies>
• 5.4 Operating Frequencies [from SRD, C80216_10/38r4.doc]
– The HR-Network shall be specified to allow operation in all radio
frequencies where 802.16 operates.
– The HR-Network shall also be specified to allow operation in
unlicensed and lightly licensed spectrum bands below 6 GHz with
means and mechanisms to coexist with other radio access
technologies (RATs)
Why 802.16n needs Self-coexistence?
<Example Scenarios of Interference>
• As shown in the figure, two mobile HR-cells (consists of mobile HR-BSs,
HR-RSs, and HR-MSs) operating in co-channel or adjacent channels meet
together, interference is introduced between HR-stations, as such selfcoexistence is needed to avoid interference among HR-stations.
• Particularly, 16n systems will operate in VHF bands that have relatively
long interference range, self-coexistence is required to avoid mutual
interference.
HRBS
HRMS
f1
HRRS
HRMS
HRBS
HRMS
interference
HRMS
f1
HRRS
HRMS
Example of Existing Self-coexistence
Mechanism
• Possibly CSMA/CA of 802.11 networks can be thought as a
very simple example of self-coexistence mechanism
• One more example is Coexistence Beacon Protocol (CBP) that
is defined in 802.22 [2]
[2]
Superframe and frame structure of 802.22
Text proposal to 802.16n SRD
regarding to Coexistence Mechanism
• We propose definition of Self-Coexistence in 16n
SRD:
– Self-coexistence : A state of acceptable co-channel and/or
adjacent channel operation among HR-stations within the
same geographical area
• Under section ”6.1.5 Coexistence requirements“ in
16n SRD, we propose to add:
6.1.5.3 Coexistence mechanism
HR-Network shall support self-coexistence mechanism.
Reference
• [1] IEEE 802.16h-2009 D9, Draft Amendment to IEEE Standard
for Local and Metropolitan Area Networks Part 16: Air
Interface for Fixed Broadband Wireless Access Systems
Improved Coexistence Mechanisms for License-Exempt
Operation
• [2] Carl R. Stevenson, Gerald Chouinard, Zhongding Lei,
Wendong Hu, Stephen J. Shellhammer, Winston Caldwell, IEEE
802.22: The First Cognitive Radio Wireless Regional Area
Network Standard, IEEE Communication Magazine, Jan 2009