IEEE 802.16 Presentation Submission Template (Rev. 9)

1
Sleep Mode Operations with Multi-carrier Support
for IEEE 802.16m

• IEEE 802.16 Presentation Submission Template
  (Rev. 9)
• Document Number IEEE C802.16m-08/1033r2
• Date Submitted 2008-09-16
• Source Chung-Hsien Hsu stanley.hsu_at_mediatek.co
  m
• Yih-Shen Chen yihshen.chen_at_mediatek.com
• I-Kang Fu IK.Fu_at_mediatek.com
• Paul Cheng paul.cheng_at_mediatek.com
• MediaTek Inc. No.1, Dusing Rd. 1, Hsinchu
  Science-Based Industrial Park,
• Hsinchu, Taiwan 300, R.O.C.
• Venue MAC Multi-Carrier Operation in
  response to the TGm Call for Contributions and
  Comments 802.16m-08/033 for Session 57
• Base Contribution This is the base
  contribution
• Purpose To be discussed and adopted by TGm
  for the 802.16m SDD

2
Design Principles (1/2)

• Multi-carrier operation principles (specified in
  SDD)
• Each MS shall consider only one RF carrier to be
  its primary carrier in a cell
• A primary carrier shall be fully configured for
  an MS
• A secondary carrier shall be partially configured
  for an MS
• The resource allocation can span across multiple
  RF carriers
• A multi-carrier system may assign secondary
  carriers to an MS in the downlink and/or uplink
  asymmetrically based on system load, peak data
  rate, or QoS demand
• Summary from the multi-carrier operation
  principles
• Traffic indication can be implemented on
  different RF carriers
• Traffic exchange can be implemented on different
  RF carriers
• Traffic indication and exchange can be
  implemented on different RF carriers

3
Design Principles (2/2)

• Design principles of Sleep mode in multi-carrier
  system
• Reuse the fundamental design concept of sleep
  mode in single-carrier system
• Enhance the power saving in RF level
• Reduce the total times of the RFs sleep/awake
  switch in an MS
• Reduce the number of MSs active RFs as many as
  possible
• Basic sleep mode operation for an MS with
  multi-carrier
• All the RFs are turned off or connected with
  other BSs in the sleep intervals
• One or more RFs can be awaked to exchange traffic
  in the extended listening windows
• Only one of the RFs is awaked to detect/receive
  traffic indication in the listening window per
  sleep cycle
• Option 1 Traffic indication is always executed
  on MSs primary carrier
• Option 2 Traffic indication is executed on one
  of the MSs carriers

4
Basic Sleep Mode Operation for an MS with
Multi-carrier (1/2)

• Option 1 Traffic indication is always executed
  on MSs primary carrier
• BS transmits traffic indication message on MSs
  primary carrier
• BS indicates MS to receive traffic on which
  carrier according to some purposes (e.g.,
  enhanced power saving, bandwidth constraint, and
  QoS consideration)
• MS receives traffic indication message on its
  primary carrier and awakes the corresponding RF
  to receive traffic
• Disadvantages
• Performance is constrained by the schedule of
  MSs primary carrier
• Ex MSs primary carrier is scheduled for
  scanning, pre-association, and network re-entry
• Power consumption is increased due to traffic
  indication and traffic exchange is executed on
  different RF carriers
• Ex BS doesnt have any bandwidth to transmit
  traffic to an MS on its primary carrier

5
Basic Sleep Mode Operation for an MS with
Multi-carrier (2/2)

• Option 2 Traffic indication is executed on MSs
  primary or secondary carriers
• BS transmits traffic indication message on MSs
  primary or secondary carriers
• BS indicates MS to receive traffic on which
  carrier according to some purposes (e.g.,
  enhanced power saving, bandwidth constraint, and
  QoS consideration)
• MS receives traffic indication message on a
  pre-designed carrier and awakes the corresponding
  RF to receive traffic
• Advantage Reduce the unnecessary RF sleep/awake
  switch for an MS
• Traffic indication and traffic exchange is
  executed on the same RF carrier for an MS
• Disadvantage Some power consumption is caused
  while executing traffic indication and traffic
  exchange on different RF carriers
• Ex BS doesnt have enough bandwidth to transmit
  all the traffic to an MS on a carrier

6
Proposed Text for SDD

• Add the following text into SDD (IEEE
  802.16m-08/003r4)
• -------------------------- text begin
  --------------------------------------------------
  ---------------------------
• 10.x.y Sleep Mode Operation with Multi-carrier
  Support
• BS transmits traffic indication message to an MS
  on one of MSs RF carriers. MS receives traffic
• indication message on a pre-designed carrier. MS
  awakes the corresponding RF to receive traffic
• in accordance with BSs resource allocation.
• -------------------------- text end
  --------------------------------------------------
  -----------------------------