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-08/1033r1
• Date Submitted 2008-09-09
• 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
Different Power-saving Level in Sleep mode (1/2)

• Connection level power saving
• A state for a connection to discontinuously
  receive/transmit traffic
• Consist of a series of alternate awake and sleep
  intervals
• Awake interval for detecting and/or receiving
  traffic
• Sleep interval for saving power
• RF level power saving
• A state for a RF to discontinuously
  receive/transmit traffic
• A common set of all the connections which are
  operated in the sleep mode on a RF carrier
• Consist of a series of alternate awake and sleep
  intervals
• Awake interval for detecting and/or receiving
  traffic
• Sleep interval for saving power or operating with
  other BSs (e.g., scanning, pre-association, and
  network re-entry)
• MS level power saving
• A state for an MS to discontinuously
  receive/transmit traffic
• A common set of all the RF carriers in an MS,
  which are all in the sleep mode
• Consist of series of alternate listening and
  sleep windows
• Listening window for detecting and/or receiving
  the traffic
• Sleep window for saving power or operating with
  other BSs (e.g., scanning, per-association, and
  network re-entry)

3
Different Power-saving Level in Sleep mode (2/2)

• Illustration of the different power-saving level
  for an MS in the Sleep mode with multi-carrier
  support

4
Design Principles

• 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
• 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 and MS 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

5
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

6
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

7
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
  --------------------------------------------------
  -----------------------------