21-07-0121-00-0000-Multi-Radio Paging

8/13/2019 21-07-0121-00-0000-Multi-Radio Paging

1/29

1

IEEE 802.21 MEDIA INDEPENDENT HANDOVER

DCN: 21-07-0055-00-0000-Multi-Radio-Paging

Title: Multi-Radio Paging Study Group RequestDate Submitted: March, 2007

Presented at IEEE 802.21 session #19 Orlando

Authors or Source(s):

Behcet Sarikaya, Phil Barber (Huawei)

Muthu Venkatachalam, Vivek Gupta, Emily Qi (Intel Corporation)

Benjamin Koh (Panasonic) Peretz Feder (Alcatel-Lucent)

Abstract: This presentation describes a few single radio pagingenvironment and then introduces the need for supporting multi-radio paging. The aim is to propose that a Study Group beestablished to assess whether there is justification to form a taskgroup to define a standard IEEE 802.21 Media IndependentPaging Service in a multi-radio environment


2/29

2

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 thisdocument 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 IEEE s name any IEEE Standards publication even though it mayinclude portions of this contribution; and at the IEEE s 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 Development http://standards.ieee.org/board/pat/guide.html>
http://standards.ieee.org/guides/opman/sect6.htmlhttp://standards.ieee.org/guides/opman/sect6.html


3/29

3

Agenda

Motivation Existing single radio paging schemes

Paging in multi-radio environment

Proposed SG scope and work


4/29


5/29

5

Use Case of Idle Mode & Paging with a single Radio

Data packets

PagingController

Idle Modemessages

Enter Idle Mode

Location Update

Exit Idle Mode

Paging

Paging

Paging

PagingData packets


6/29

6

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.

Already exists in todays networks


7/29

7

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.


8/29

8

WLAN Paging Currently no paging for WLANs but a proposal exists

Idle Mode Operation

AP and Client advertises Paging Capability Discovery Client enters Idle Mode if there is no incoming traffic AP broadcasts Paging Indications (Paging ID), and client wakes up to receive paging indication Client exits Idle Mode when client is paged

Paging Group (PG) - a group of APs in which STA can be paged Provides a collection of BSSs which a Client may traverse without requiring re-

association A Client must reassociate if it transitions to an AP in a different Paging Group

Paging Server Provides Paging Services and 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


9/29

9

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 or Paging Area Paging Server or Paging Controller


10/29

10

Multi-Radio Paging Potential Benefits

In a multi-radio environment, the MN may have multiple

radios and each radio may be in connected or idle states Potential 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, unified multi-radio pagingprimitives are needed for multi-radioenvironments


11/29

11

Multi-Radio Paging Potential Benefits

Tight-coupling solutions for 802.16 & 802.11 planned in futurereleases

Multi-radio MN can enjoy benefits of location update onconnected radio (WLAN), 802.16&802.11 idle mode entry using802.11 radio, 802.16&802.11 paging on 802.11 radio

CSN

H

HAAA

SN

W * Access

Point

ASN

WLAN

SN

W BS

CSN


12/29


13/29

13

Objective

It is proposed that a Study Group be established toassess whether there is justification to form a taskgroup to define a standard IEEE 802.21 MediaIndependent Paging Service in multi-radio

environment


14/29

14

Proposed SG Scope

Identify and quantify multi-radio paging benefits

Identify technical scope Determine impacts on IEEE 802.16, 802.11, and otherstandards, for example:

Potential Remediation : Determine whether availablemechanisms are economically feasible and of utility to the

community Threat Analysis : Identify security threats especially when

networks cross operator administrative domains MAC and IP layer message requirements : Identify the

engagement with IEEE 802.16, 802.11, 802.15, 802.22,WiMAX, 3GPP LTE and 3GPP2

IP layer message requirements : Identify the engagementwith IETF

Decide whether a TG is needed, and if so define PAR and5Criteria.


15/29

15

Reference

21-06-0701-00-0000-Media independent idle mode andpaging.ppt, by Muthaih Venkatachalam (IntelCorporation)

11-07-0061-00-000v-presentation-paging-and-idle-mode.ppt, by Emily Qi et al

11-07-0058-01-000v-paging-power-saving-analysis-update.ppt, by Emily Qi et al


16/29

16

Backup


17/29

17

Paging via connected radio

MS_aBS/AP

of radio r_kPC

of radio r_kPC

of radio r_i

Pa gi ng ann ou nce o n r_kto turn on r_i

1a

PC of r_j

Pa g ing an n oun ce o n r _ kto tur n on r_i

Is your radio in connectedmode in MS_a? Is your radio in connected

mode in MS_a?

Ye s! r_k is in c on nec ted mo de in M S _a

Inter PC co-ordination

2

1b

3

5

4

MSG #1, #2,

#3, #4, and#5: IETF

BS/AP Paging AnnouncementPrimitives: IEEE 802.21 Possible Contents: Paging and PagingMedia/Radio Interface

MS receiving Paging AnnouncementPrimitives: IEEE 802.21 Possible 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


18/29

18

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 fo r r_k ( s ent on radio r _i)

LU_R S P for MS

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 802.21 Possible Contents: Paging and PagingMedia/Radio Interface, Location Information

MS Location Update Request/ResponsePrimitives: IEEE 802.21 Possible Contents: Paging and PagingMedia/Radio Interface, Location Information


19/29

19

Aggregated Location Update

If the PGs are overlapping, perform a single LU operation for multiple radios.

Minimizes messaging and processing at the MS

BS/APof radio r_i

LU for r_i,j,k (sent onradio r_i)

PCof radio r_i

PCof radio r_j

LU for r_i,j,k (sent onradio r_i)

LU for r_k (sent on radio r_i)

LU _ RSP f or M S

LU_RSP for MS

LU_RSP for MS (sent onr_i)

PCof radio r_k

LU fo r r_ j ( se nt o n rad io r_i )

LU_RSP for MS

MS

BS/AP Location UpdateRequest/Response Primitives: IEEE802.21 Possible Contents: Paging andPaging Media/Radio Interface,

Location Information

MS Location UpdateRequest/Response Primitives:IEEE 802.21 Possible Contents: Paging andPaging Media/Radio Interface,Location Information

MSGs: IETF

ExtendedLocationUpdateMessage for

Multi radio:IEEE 802.16,802.11


20/29

20

Paging-aggregation

Page on a single idle radio to wake up multiple idle radios.

MSBS/AP

of radio r_iPC

of radio r_iBS/PC

of radio r_j

Paging on r_i (m eant forradios r_i,j,k)

1

BS/PCof radio r_k

IM exit for r_i,j,k

Pa g ing on r _ i (m ean t for radi os 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


21/29

21

Idle mode Entry/Exit Scenario: 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)

PCof radio r_i

PCof radio r_j

PCof radio r_k

IM_entry f o r MS on r_ i, r_j,r_ k (sent on ra dio r_i)

IM _e ntry for M S

IM_entry for MS

1

2

3

4

IM_entry_R S P for MS(paging p arameters f or 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_en try _RSP forM S (paging para m s for

r _i ,j,k)8

MSGs: IETF

MS Enter/Exit Idle ModeRequest/ResponsePrimitives: IEEE 802.21 Possible Contents: Pagingand Paging Media/RadioInterface, Location

Information

BS/AP Enter/Exit Idle ModeRequest/Response Primitives:IEEE 802.21 Possible Contents: Paging andPaging Media/Radio Interface,Location Information

Extended Idle ModeRequest/Response messagesfor Multi radio: IEEE 802.16,

802.11


22/29

22

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

3GPP/WiMAX/IEEE: IP Layer messages (back end) Messages between Paging Controllers Between Paging Controller and PoA (BS/AP).


23/29


24/29

24

Comments/ Concerns

There are potentially several security issues to considerespecially when networks cross operator administrativedomains

IPSec and IKEv2 available and widely used


25/29

25

Comments/ Concerns (contd)

There are issues around evolution of paging systems, doesMRP, i.e. inter-operability restrict innovation in 3GPP LTE? MPR is not about individual paging systems, so paging systems

can evolve independent of MPR The glues (IP layer backend messages) may need to be redefined


26/29

26


Given that paging systems are evolving and new pagingsystems are very efficient, are the gains from MRP likely to besignificant or very modest?

Multi-radio Paging gains are significant: Due to resource allocation/ QoS, single-radio idle mode entry

requires at least 4 message exchange with two messages overthe air; the same for idle mode exit

For a 3 radio MN, Location update separately on single-radio requires a total of 3 * (4 + 4 + 4), 36 messages with 18 over theair

Aggregated LU procedure of multi-radio paging using theconnected radio requires only 8 messages with 2 over the air


27/29

27


Given that paging systems are evolving and new pagingsystems are very efficient, are the gains from MRP likely to besignificant or very modest?

Multi-radio Paging gains are significant: Single-radio paging potentially involves many (n) BSs in the

same paging area broadcasting paging request messages. Onlyone BS reports success to the paging controller (PC), PC stopsn-1 BSs

Paging via connected radio procedure of multi-radio paging avoids the search and requires only two messages


28/29

28


There are potentially issues on why MRP needs to function inL2? The reasons are the same as for 802.21


29/29

29

Motion

Move that the IEEE 802.21 WG form a study group todetermine how to formally describe the IEEE 802.21Multi-Radio Paging functions and behaviors, with theintent to create a PAR and five criteria documents toform a new Task Group.

21-07-0121-00-0000-Multi-Radio Paging

Documents

Transcript of 21-07-0121-00-0000-Multi-Radio Paging