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IEEE 802.21 MEDIA INDEPENDENT HANDOVER
DCN: 21-06-0747-00-0000-Idle-Mode-and-Paging
Title: Media Independent Paging Service
Date Submitted: November, 2006
Presented at IEEE 802.21 session #17 Dallas
Authors or Source(s):
Muthaih Venkatachalam, Shweta Shrivastava, James Tsai, EmilyQi, Vivek Gupta (Intel Corporation)
Abstract: This presentation talks about standard message and
primitive requirement in support of Media Independent PagingService in multi-radio environment.
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IEEE 802.21 presentation release statements
This document has been prepared to assist the IEEE 802.21 WorkingGroup. It is offered as a basis for discussion and is not binding on thecontributing individual(s) or organization(s). The material in this
document is subject to change in form and content after further study.The contributor(s) reserve(s) the right to add, amend or withdrawmaterial contained herein.
The contributor grants a free, irrevocable license to the IEEE toincorporate material contained in this contribution, and any modificationsthereof, in the creation of an IEEE Standards publication; to copyright inthe IEEEs name any IEEE Standards publication even though it mayinclude portions of this contribution; and at the IEEEs sole discretion topermit others to reproduce in whole or in part the resulting IEEEStandards publication. The contributor also acknowledges and acceptsthat this contribution may be made public by IEEE 802.21.
The contributor is familiar with IEEE patent policy, as outlined in Section6.3 of the IEEE-SA Standards Board Operations Manual
and inUnderstanding Patent Issues During IEEE Standards Developmenthttp://standards.ieee.org/board/pat/guide.html>
http://standards.ieee.org/guides/opman/sect6.htmlhttp://standards.ieee.org/guides/opman/sect6.html7/29/2019 21-06-0747-00-0000-Idle mode and Paging
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Agenda
Motivation
Idle Mode and Paging
Paging in multi radio environment
Standard Message and Primitive Requirements
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Motivation
For a single radio MN, idle Mode and Paging has already been
proposed independently in WiMax, 3GPP and WiFi to extendbattery standby time
In a multi radio environment, the MN may have multiple radiosand each radio may be in connected or idle state. There is
an opportunity to provide paging service via connected radioand aggregate paging messages across multi radios
Fewer paging messages across network infrastructure
Fewer number of active radios on MN
Multi Radio Paging can lead to considerable power saving at
the MN and also provide radio/network/device resourceoptimization at the mobile communication infrastructure
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Use Case of Idle Mode & Paging with a single Radio
Data packets
Paging
Controller
Idle Mode
messages
Enter Idle Mode
Location Update
Exit Idle Mode
Paging
Paging
Paging
Paging
Data packets
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3GPP- LTE Paging
UE eNBs in TA MME/UPE
Bufferdata
User Data
Check UEstate, TA
Paging MessagePaging Message
Paging Response
Paging Response
UP establishment
Encrypted data
UE eNBs in TA MME/UPE
Bufferdata
User Data
Check UEstate, TA
Paging MessagePaging Message
Paging Response
Paging Response
UP establishment
Encrypted data
eNB
eNB
eNB
MME/UPE MME/UPE
S1
X2
X2
X2
EPC
E-UTRAN
3GPP-LTE Network Architecture 3GPP-LTE Paging Protocols
UE enters IDLE mode when there is no activity.
Discontinuous Reception (DRX) UE uses DRX in IDLE mode, i.e. wakes upperiodically to check for paging messages.
UE learns DRX cycle length upon network entry from the eNodeB.
UE is registered at Tracking Area Level.
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WiMAX Paging
Paging controller (PC) is a logical entity that administers activity of Idle modeMS. It may be co-located with BS or ASN Gateway. A PC may monitor one ormore paging groups.
Paging Agent (PA) entity, co-located with BS, handles the interaction betweenPC and paging functionality implemented in BS.
Location Register (LR) is a database that contains information about Idle modeMSs.
PC is responsible for sending paging messages and handling location updates.
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WLAN PagingIdle Mode Operation
STA advertises Paging Capability Discovery
Non-AP STA enters Idle Mode AP broadcasts Paging Indications (partial virtual bitmap), and STA wakes up toreceive paging indication
Non-AP STA exits Idle Mode
Paging Group (PG) - a group of APs in which STA can be paged A Mobility Domain comprises one or more Paging Groups A STA must reassociate if it transitions to an AP in a different Paging Group
Paging Server Provides Paging Services and Paging key management Serves one or more Paging Groups
AP
AP
AP
AP
AP
AP
AP
AP
AP
AP
AP
AP
AP
AP
Paging group #1
Paging group #2
Paging Server #2
Paging group #3
Paging Server #1
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Paging Summary in a single radio environment
For each individual Radio,Key Paging Messages
Paging Capability Discovery
Enter/Exit Idle Mode
Location Update (sent by MN aka Idle Mode Update)
MS sends location update to the infrastructure
Paging Indication (sent by infrastructure)
MS periodically wakes up to check whether it is being paged or not
Key Concept and Logical Entity
Paging Group Paging Server (or Paging Controller)
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Multi Radio Paging and Benefits
In a multi radio environment, the MN may have multiple radios
and each radio may be in connected or idle states
Multi Radio Paging Benefits
All Paging messages via the connected radio Paging Indication Message sent via the connected radio
Location Update via the connected radio
Paging aggregation minimizes message exchange Paging Indication Message aggregation
Location Update aggregation
Idle Mode Enter/Exit aggregation
Therefore, what do we need from standards ?
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Proposed Standard Engagements
IEEE 802.21: Standard Message Primitives
Paging capability Primitives
Location Update Primitives
Enter/Exit Idle Mode (Radio State update) Primitives
Paging Indication Primitives
IEEE 802.16, 802.11, LTE (?): MAC layer messages
RAN specific Containers/Transport to carry above messages
IETF/3GPP: IP Layer messages (back end)
Messages between Paging Controllers
Between Paging Controller and PoA (BS/AP).
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Call to Action
Form a study group in 802.21 to study Paging service inmulti radio environment
Investigate requirement for standards based multi radioprimitives
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Reference
21-06-0701-00-0000-Media independent idle mode andpaging.ppt, by Muthaih Venkatachalam (IntelCorporation)
11-06-0950-04-000v-wlan-paging-and-idle-mode.ppt,by Emily Qi et al
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Backup
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Paging via connected radio
MS_aBS/AP
of radio r_k
PCof radio r_k
PCof radio r_i
Paging announce on r_kto turn on r_i
1a
PC of r_j
Pagingannounce on r_kto turn onr_i
Is your radio in connectedmode in MS_a?
Is your radio in connectedmode in MS_a?
Yes! r_k is in connected
mode in MS_a
Inter PC co-ordination
2
1b
3
5
4
MSG #1, #2,
#3, #4, and#5: IETF
BS/AP Paging AnnouncementPrimitives: IEEE 802.21Possible Contents: Paging and PagingMedia/Radio Interface
MS receiving Paging AnnouncementPrimitives: IEEE 802.21Possible Contents: Paging and PagingMedia/Radio Interface
Scenario User is browsing on the WiFi interface
User gets a voip call on the WiMAX interface. WiMAX network needs to page the user
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Location Update via connected radio
BS/APof radio r_i
LU for r_k (sent on radior_i)
PCof radio r_i
PCof radio r_k
LU for r_k (sent on radior_i)
LU forr_k (sent on radio r_i)
LU_RSP forMS
LU_RSP for MS
LU_RSP for MS (sent onr_i)
User has WiFi connection that is currently active and WiMAX connectionthat is idle.
Instead of contending on the WiMAX airlink, MS uses the WiFi radio toperform location update for its WiMAX radio
All MSGs: IETF
BS/AP Location Update Request/ResponsePrimitives: IEEE 802.21Possible Contents: Paging and PagingMedia/Radio Interface, Location Information
MS Location Update Request/ResponsePrimitives: IEEE 802.21Possible Contents: Paging and Paging
Media/Radio Interface, Location Information
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Aggregated Location Update
If the PGs are overlapping, perform a single LU operation for multiple radios.
Minimizes messaging and processing at the MS
BS/AP
of radio r_i
LU for r_i,j,k (sent on
radio r_i)
PC
of radio r_i
PC
of radio r_j
LU for r_i,j,k (sent on
radio r_i)
LU for r_k (sent on radio r_i)
LU_RSP for MS
LU_RSP for MS
LU_RSP for MS (sent on
r_i)
PC
of radio r_k
LU for r_j (sent on radio r_i)
LU_RSP for MS
MS
BS/AP Location UpdateRequest/Response Primitives: IEEE802.21Possible Contents: Paging andPaging Media/Radio Interface,
Location Information
MS Location UpdateRequest/Response Primitives:IEEE 802.21Possible Contents: Paging andPaging Media/Radio Interface,Location Information
MSGs: IETF
ExtendedLocationUpdateMessage for
Multi radio:IEEE 802.16,802.11
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Paging-aggregation
Page on a single idle radio to wake up multiple idle radios.
MSBS/AP
of radio r_i
PC
of radio r_i
BS/PC
of radio r_j
Paging on r_i (meant forradios r_i,j,k)
1
BS/PCof radio r_k
IM exit for r_i,j,k
Paging on r_i (meant forradios r_i,j,k)
Extended PagingAnnouncement Message
for Multi radio: IEEE802.16, 802.11
MS receiving Paging AnnouncementPrimitives: IEEE 802.21
Possible Contents: Paging and PagingMedia/Radio Interface
BS/AP Paging Announcement
Primitives: IEEE 802.21Possible Contents: Paging andPaging Media/Radio Interface
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Idle mode Entry/ExitScenario: Multiple radios are switched to idle mode
For example: when the user takes a break, hisWiMAX, WiFi and 3G connections may go into idlemode
IM Entry/Exit for radios i, j , k happens on radio-i.
MSBS/AP
of radio r_i
IM_entry for r_i, r_j, r_k
(sent on radio r_i)
PC
of radio r_i
PC
of radio r_j
PC
of radio r_k
IM_entry for MS on r_i, r_j,r_k (sent on radio r_i)
IM_entry for MS
IM_entry for MS
1
2
3
4
IM_entry_RSP for MS(paging parameters for r_j)
IM_entry_RSP for MS (contains paging params for r_k)
5
6
IM_entry_RSP for MS(paging params for r_i,j,k)
7
IM_entry_RSP forMS(paging params for
r_i,j,k)8
MSGs: IETF (IPPaging?)
MS Enter/Exit Idle ModeRequest/ResponsePrimitives: IEEE 802.21Possible Contents: Pagingand Paging Media/RadioInterface, Location
Information
BS/AP Enter/Exit Idle ModeRequest/Response Primitives:IEEE 802.21Possible Contents: Paging andPaging Media/Radio Interface,Location Information
Extended Idle ModeRequest/Response messagesfor Multi radio: IEEE 802.16,
802.11