C80216m-08_210r2

Project IEEE 802.16 Broadband Wireless Access Working Group <http://ieee802.org/16>

Title 16m Downlink Control Information Hierarchy

Date Submitted 2008-03-10

Source(s) Mingyang Sun, Xueqin Gu, Chongli Liu, Juejun Liu, Yunsong Yang, Zhigang Rong, Jianmin LuHuaweiShanpeng Xiao, Wenqi LiaoChina MobileXiaolu Dong, Ying DuCATRJiahua LiuAlcatel Shanghai BellXin Su, Xiaofeng ZhongTsinghua University

E-mail: yunsongyang@huawei.comxiaoshanpeng@chinamobile.comliaowenqi@chinamobile.comdongxiaolu@mail.ritt.com.cnduying@mail.ritt.com.cnjianhua.liu@alcatel-sbell.com.cnsuxin@mail.tsinghua.edu.cnzhongxf@tsinghua.edu.cn

Re: IEEE 802.16m-08/005: Call for Contributions on Project 802.16m System Description Document (SDD).

Target topic: “Downlink Control Structures”.

Abstract Proposal for downlink control structures

Purpose For discussion and approval by TGm

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>.

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[1]. IEEE C80216m-08_118r1

16m Downlink Superframe Structure [1]

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Downlink Control Information HierarchyDL Control Information

Physical Control Channels

Control Messages over Data Channels

Superframe Header Mini-frame Control Channels

Step 1

Step 2

Step 3

Step 4MS

Power Up

Control Information Hierarchy

SYNCH andDL System Parameters

Additional DL System Parameters

and UL System

Parameters

Access Active

FIG. X: Downlink Control Information Hierarchy

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PSC

SSC

0 1 2 3 4 5

SubframeOFDM Symbol

PBCH

SBCH/QPCH

Freq

uenc

y

Time

• SCH for initial network acquisition, with fixed CP length to minimize blind detection

– PSC for timing and frequency correction• Possible for SFN transmission within

network– SSC for Cell_ID

• P-BCH for network-wide common and static parameters such as bandwidth, CP length, superframe index, TDD ratio

– Possible for SFN transmission within network

• S-BCH for sector-specific parameters such as antenna setting, power setting, control zone setting, resource allocation setting, System Information message setting, 16e/16m ratio/offset, H-FDD setting, etc.

– Sufficient to allow MS to decode the DL data channels

• QPCH for quick paging messages– Possible with SFN transmission within

QPCH zone

Example of DL Super-frame Header

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Data Mini-frame Control Information

• The control information relating to the data traffic in each data Mini-frame includes– Scheduling grant message for DL/UL resource allocation– System acquisition grant message for fast response to random

access attempts – UL power control bits– ACK/NACK bits for UL data channel HARQ

• We provide more details of two control structures of the data mini-frame in contributions IEEE C80216m-08/211 and IEEE C80216m-08/212, respectively.

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Example of Control Messages Carried on Data Channels

• Common/broadcast control messages– using fixed periodical broadcasting without a dynamic

scheduling grant message; and/or using a dynamic allocation of a data channel that is identified with a common MACID in the scheduling grant message

– for example, additional downlink system parameter messages, uplink system parameter messages, full paging messages, etc.

• User-specific control messages– Identified with user-specific MACID

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Text ProposalInsert the following text into Physical Layer sub-clause (C802.16m-08/003)

11.X Downlink Control Information Hierarchy

11.X.1 Super-frame header

The Super-frame Header shall provides:• Synch signals for timing and frequency correction• Cell_ID• network-wide common parameters, e.g. bandwidth, CP length, superframe index, TDD

ratio, etc.– with SFN transmission within the network

• sector-specific system parameters that are sufficient for the MS to decode the DL data channels, e.g. antenna setting, power setting, control zone setting, resource allocation setting, System Information message setting, 16e/16m ratio/offset, H-FDD setting, etc.

– Additional DL system parameters and UL system parameters are broadcasted in System Information message using the data channels

• quick paging messages, possibly with SFN transmission within the quick paging zone– Full paging message transmitted using the data channels, possibly with SFN transmission

within the paging zone

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Text ProposalInsert the following text into Physical Layer sub-clause:

11.X.2 Data Mini-frame Control Information

The control information relating to the data traffic in each data Mini-frame includes:• Scheduling grant message for DL/UL resource allocation• System acquisition grant message for fast response to random access attempts • UL power control bits• ACK/NACK bits for UL data channel HARQ

11.X.3 Control Messages Carried on the Data Channel

Additional downlink and uplink system parameter messages and full paging messages can be carried on the data channel using fixed periodical broadcasting without a dynamic scheduling grant message; and/or using a dynamic allocation of a data channel that is identified with a common MACID in the scheduling grant message. User-specific control messages can also be carried on the data channels using user-specific MACID.