IEEE C802.16m-10/0543r1
Project
IEEE 802.16 Broadband Wireless Access Working Group <http://ieee802.org/16>
Title
Clarification on General Multi-Carrier Operations (16.2.8.1)
Date
Submitted
2010-05-12
Source(s)
I-Kang Fu, Kelvin Chou, Yih-Shen Chen,
Alex Hsu, Paul Cheng
MediaTek Inc.
IK.Fu@mediatek.com
Youngsoo Yuk
youngsoo.yuk@lge.com
LG Electronics
Hyunjeong Kang
hyunjeong.kang@samsung.com
Samsung Electronics
Re:
P802.16m/D5
Abstract
The description of general overview on multi-carrier operations supported by IEEE 802.16m was
improved in P802.16m/D5, but there is still room for further improvement. This contribution
aims to clean up the description on general multi-carrier operations to prevent potential
ambiguous.
Purpose
For TGm discussion and adoption into P802.16m/D6
Notice
Release
Patent
Policy
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
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<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
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IEEE C802.16m-10/0543r1
<http://standards.ieee.org/board/pat>.
Clarification on General Multi-Carrier Operations
I-Kang Fu, Kelvin Chou, Yih-Shen Chen, Alex Hsu, Paul Cheng
MediaTek Inc.
Youngsoo Yuk
LG Electronics
Hyunjeong Kang
Samsung Electronics
1 Text Proposal
---------------------------------------------------------Start of the Text----------------------------------------------------------[Adopt the following text modification into AAI_SCN-REP message format started from line#55, page#296 in
P802.16m/D5]
16.2.8.1 Multicarrier Types and Operational Modes
When supporting The carriers involved in multicarrier operations, two types of carriers are defined from an
AMS point of view are of two types:
•Primary Carrier: A primary carrier is a standalone carrier where AMS complete initial network entry or
network reentry procedure. When supporting multicarrier operations, an AMS shall only have one primary
carrier and may be assigned with multiple secondary carriers.
•Secondary Carrier: Secondary carriers are additional carriers which may be assigned to configured for the
AMS by the ABS. All the unicast MAC control messages relative to multicarrier operations shall be sent to the
AMS through its primary carrier.
When supporting In the multicarrier operations, a common MAC in ABS can may utilize the radio resources in
the primary carrier and the secondary carriers,. The while maintaining full control of AMS mobility, MAC state
and context of the AMS are managed and controlled by ABS through the primary carrier.
For FDD systems each available downlink or uplink frequency channel, and for TDD system each available
duplexed frequency channel, is individually referred to as a carrier using a Physical Carrier Index. Physical
carrier index is the index assigned by the network for indicating all the available carriers across the entire
network and is sorted indexed from lower frequency to higher frequency.
Each physical carrier The carriers of a multicarrier system may be configured differently as follows:
•Fully Cconfigured Ccarrier: A standalone carrier for which all control channels including synchronization,
broadcast, multicast and unicast control signaling are configured. Fully configured carrier shall be supportsed
both single carrier AMS and multicarrier AMS. by all the AMSs regardless of the support of multicarrier.
•Partially Cconfigured Ccarrier: A carrier configured for downlink only transmission in TDD or a downlink
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IEEE C802.16m-10/0543r1
carrier without paired UL carrier in FDD mode. The partially configured carriers may be used only in
conjunction with a primary carrier and cannot operate standalone to offer AAI services for an AMS.
[Note: Split the original paragraph into two paragraphs here]
If a partially configured carriers is used for DL unicast traffic, the required UL feedback channels are provided
by the primary carrier. In multicarrier aggregation, the UL control channels corresponding to the secondary
partially configured carriers i.e., DL only secondary carriers shall be located in distinct non-overlapping control
regions in the UL of the primary carrier. The UL control regions for the DL only secondary carriers are behind
the UL control region for the primary carrier. The location information of the UL control channels for the DL
only secondary carriers are informed through the AAI_SCD message which are transmitted on the secondary
carriers. The AMS shall use the UL control channels on the primary carrier to feedback HARQ ACK/NACK and
channel quality measurements corresponding to transmission over DL only secondary carrier. Only the FDD
primary carriers may be used to provide UL feedback channels for DL partially configured carriers. A partially
configured carrier may be optimized and used for broadcast services only in which case it would not need UL
feedback channel support on primary carrier.
A primary carrier is fully configured while a secondary carrier may be fully or partially configured depending on
deployment scenarios. Whether a carrier is fully configured or partially configured is indicated using APreamble of the carrier. The AMS shall not attempt to perform network entry or handover to over the partially
configured carriers.
In addition to partially configured carriers, the ABS may also configured DL only part of an FDD fully
configured carrier to be paired and supported by the UL feedback channels on the AMS's primary carrier of the
AMS.
A secondary carrier for an AMS, if fully configured, may serve as primary carrier for other AMSs. The multiple
AMSs with different primary RF carriers may also share the same physical carrier as their secondary carrier. The
following multicarrier operation modes are identified, which may all or independently be supported:
•Multicarrier Aggregation: The multicarrier mode in which the AMS maintains its physical layer connection
and monitors the control signaling on the primary carrier while processing proceeding data transmission on the
secondary carrier. The resource allocation to an AMS may span across a primary and multiple secondary carriers.
Link adaptation feedback mechanisms should incorporate measurements relevant to both primary and secondary
carriers. In this mode the system may assign secondary carriers to an AMS in the downlink and/or uplink
asymmetrically based on AMS capability, system load (i.e., for static/dynamic load balancing), peak data rate, or
QoS demand.
•Multicarrier Switching: The multicarrier mode in which the AMS switches its physical layer connection from
the primary to the partially configured or fully configured secondary carrier by per ABS's instruction to receive
E-MBS services on the secondary carriers. The AMS connects with the secondary carrier for the specified time
period and then returns to the primary carrier. When the AMS is connected to the secondary carrier, the AMS is
not required to maintain its transmission or reception through the primary carrier.
The AMS supports at least one of the above multicarrier mode is called multicarrier AMS, otherwise it is called
single-carrier AMS.
The following is the general scenario considered for common to all multicarrier modes of operations:
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IEEE C802.16m-10/0543r1
•The system defines N standalone fully configured RF carriers; each configured with all synchronization,
broadcast, multicast and unicast control signaling channels needed to support an single-carrier AMS in single
carrier mode. Each AMS in the cell is connected to and its state being controlled through only one of the fully
configured carriers designated as its primary carrier.
•The system may also define M (M >= 0) partially configured RF carriers, which can only be used as
secondary carriers along with a primary carrier, for downlink only data transmissions.
•The set of all supported radio carriers in an ABS is called Available Carriers.
•The Available Carriers may be in different parts of the contiguous same spectrum block or in non-contiguous
spectrum blocks.
•In addition to the information about the (serving) primary carrier, an ABS, can also provides AMSs with some
configuration information about its available carriers through such primary carrier by AAI_Global-Config and
AAI_MC-ADV messages. Through such messaging the ABS informs AMS's of the presence, bandwidth,
duplexing, and location in the spectrum for all available carriers to help AMS prepare for any operation
involving multiple carriers. The primary carrier may also provide an AMS the extended information about the
configuration of the secondary carrier.
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