Transcript 21-04-0170-02-0000-bhatt_singh_Details_V1_0

• IEEE 802.21 MEDIA INDEPENDENT HANDOVER
• DCN: 21-04-0170-00-0000
• Title: IEEE 802.21 Media Independent Handover Solution
Proposal – Updated with details (see abstract below)
• Date Submitted: January 10, 2005
• Presented at IEEE 802.21 session #6 in Monterey (CA)
• Authors or Source(s): Yogesh Bhatt, Ajoy Singh, Lach HongYon, Alistair Buttar, Nat Natarajan, Madjid Nakhjiri,
• Abstract: List of L1 and L2 behaviors, How to carry each of
them, MIH reference architecture and clear demarcation of
handover functionality in terms of HO decision vs. HO
execution, and HO call flows for Fast handover solution
proposed by IETF.
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IEEE 802.21 presentation release statements
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Details of IEEE 802.21 Media Independent
Handover Solution Proposal
Yogesh Bhatt, Ajoy Singh, Hong-Yon Lach, Alistair Buttar,
Motorola
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Handovers
• Handover control require two functionalities:
• Handover Decision
• Handover Execution
• Handover decision is based on the knowledge of
• When HO is required? –
• Detection of occurrence of some condition/situation
• May be based on Network or User or Both
• Where to Handover to?
• Appropriate new point of attachment
• May be based on application or other entity
• Handover execution deals with exchanging control messages to
• Associate/Attach with the new AP/BS
• Register with new network if inter-domain HO
• Detach from old AP/BS
• De-register to update the location
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Functionality of proposed MIH Layer
• Services provided are
• Link Event Service
• Information Service
• Command Service
• Inter-works with Resource Control and Management layers of
L2 Access networks
• 802.xx (MSAP, PhSAP, Station Management),
• 3GPP (UMTS RRC/NAS, GERAN RR/GMM)
• 3GPP2 (CDMA L3)
• Provides services to entities through MIH_USR_SAP
• MIH interacts with lower layer either using SME or lower layer
SAP(s) such as
• LLC_SAP,MSAP, MLME_SAP, PhSAP and PLME_SAP
• Available at both mobile node as well as access network
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MIH Functional Model
Mgmt
L3
Signaling
Apps
Mgmt
MIH Services
L3
Signaling
Apps
MIH Services
MIH FUNCTION
MIH FUNCTION
HO detection
Signaling
LLC
PHY1 (PLME)
Multimode
Terminal
Station Functional
Entity
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PHY2
Local
Triggers/Hints
MAC2
NAS, RRC, MAC (MLME)
LLC
Remote
Triggers/Hints
NAS, RRC, MAC (MLME)
Local
Triggers/Hints
PHY
Network Equipment
Network Functional Entity
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Link Event service
• Enables registered MIH-User to receive link layer event
information from the underlying links
• E.g. 802.xx, UMTS, CDMA etc
• The MIH-User entities register with the MIH for a specific set
of events using register primitive
• The MIH obtains event notifications from IEEE 802 family
SAPs as well Cellular Ifs and propagate the received events to
the registered entities
• The MIH also communicates with its peer to provide event
service
• The information between peer MIH entities can be exchanged
either using :
• Link layer specific means or
• Higher layer protocol/s or
• Combination of both
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Command Service
• Enables registered MIH-Users to command the link layer to execute a
set of actions
• Command instructs the MIH to perform various activities needed to
effect the action requested by MIH-User e.g.
• Attach , Register over a link
• pre-authenticate to a link
• re-associate to AP/BS
• MIH invokes technology specific methods through L1/2 SAPs.
• MIH may execute the command locally or route it to a peer.
• MIH does not make any decision, but only invokes appropriate link
technology specific means to execute the command
• Remote commands are communicated using
• Link layer specific means or
• Higher layer protocol/s or
• Combination of both
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Information Service
• Enables registered MIH-User to obtain access technology
specific capability and/or capacity information from the
relevant L2 links
• Above information can be obtained from local or remote L1/2
• MIH provides both local and remote information retrieval to the
registered MIH-Users
• MIH may also communicate with its peer to provide
information service
• MIH-User can also Poll the link for some Information
• The information between peer MIH entities can be exchanged
either
• Link layer specific means or Higher layer protocol/s or
• Support IETF enhanced CARD or other Capability standards
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MIH Layer Functionality
L3 (Mobile IP,
CARD)
Handoff Control
Function
Transport Layer /
App Layer
MIH_USR_SAP
MIH Service Registration & Execution
(Event, Command & Information Services)
Event Registration, Generation & Processing
Command execution and processing
Trigger processing
IE en/de-capsulation
Link polling
3G If
RRC/NAS
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PHY_SAP
PHY
MAC_SAP
MAC
MLME_SAP
MLME
PLME_SAP
PLME
LLC_SAP
LLC
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Reference MIH architecture
Applications
Mobility Service Engine
HO Execution
Data Transfer
Networking
Stack
L3 Mobility
software
MIH layer
HO Detection
Network Device Driver(s)
Access
link
Stack
Access
link
Stack
Access
link
Stack
Control & Info
App Data
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Proprietary Interactions
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Mobile Initiated and Mobile Controlled L3
Handoff (without L3 capability)
Multimode STA
HL
Old Point of Attachment
LL
New Link
Found
MIH
Function
LL
New Point of Attachment
HL
LL
MIH
Function
HL
Triggers
Candidate
Link Found
Command: Attach to new link
Handoff
Control
Capability exchange using MAC frame
extension
Capabilities
Capability exchange using MAC frame extension
Pre- Triggers
Fast
Handoff
MIH
Function
MIP Fast Handoff Msgs
Fast
Handoff
MIP Fast Handoff Msgs
Data Transfer
Fast
Handoff
Link Down
Link UP
Link Down
Data Transfer
Slide 12
Link UP Trigger
Mobile Initiated and Mobile Controlled L3 Handoff
Multimode STA
HL
Old Point of Attachment
LL
New Link
Found
MIH
Function
LL
New Point of Attachment
HL
LL
MIH
Function
Triggers
HL
CARD
MN-AR CARD Request
CARD
CARD
MN-AR CARD Reply
AR-AR CARD Request
L2 Capabilities
AR-AR CARD Reply
Candidate
Link Found
L2 and L3
MIH
Capabilities HO Control
Function
Pre- Triggers
MIP Fast Handoff Msgs
MIP Fast Handoff Msgs
Data Transfer
Fast
Handoff
Link Down
Link UP
Link Down
Data Transfer
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Fast
Handoff
Fast
Handoff
Link UP Trigger
Network Initiated Network Controlled L3
Handoff
Multimode STA
Old Point of Attachment
HL
LL
MIH
Function
LL
New Link Found
New Point of Attachment
HL
LL
MIH
Function
HL
Triggers
MN-AR CARD Request
CARD
CARD
MN-AR CARD Reply
AR-AR CARD Request
CARD
AR-AR CARD Reply
L2 Capabilities
L2 and L3 Capabilities
MIH
Function
HO Control
Pre- Triggers
Triggers
MIP Fast Handoff Msgs
MIP Fast Handoff Msgs
Data Transfer
Fast
Handoff
Fast
Link Down Trigger Handoff
Link Down
Link UP
Data Transfer
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Fast
Handoff
Link UP Trigger
Required link behaviors for handover
• Max bandwidth
• Received bandwidth
• Delay, Jitter
• Error rate (BER, FER, BLER , PER )
• Power consumption
• QoS ( Priorities or Parameters or both)
• Access type
• Radio Signal Strength
• Channel Noise Ratio
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L1 behaviors
Radio Signal
Strength
(Definition
varies for each
radio-802.11,16,
WCDMA,CDM
A2000)
Channel Noise
Ratio
(Definition
varies for each
radio-802.11,16,
RT determination
from L1 or L2,
Local Trigger to
MIH
New Link found
trigger
RT determination
from L1, Notified
as Local Trigger to
MIH
MIH applies
hysterias/ threshold
 MIH can also
poll L1/L2 on User
request
MIH applies
hysterias/ threshold
 MIH can also
poll L1 on user
request
Delivered to
Registered
MIH-User as
 Candidate link
Available event
Delivered to
Registered
MIH-User as
 Link Status
change event
WCDMA,CDM
A2000)
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L1 behaviors
Link Type
Non-RT determination, Notified by L1/L2
Part of new link found to MIH as part of
trigger
link attributes
MIH can also
poll on User
request
Power
RT or non-RT
Consumption determination,
Part of new link found
trigger
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Notified by L1/L2
to MIH as part of
link attributes
MIH can also
poll on User
request
Delivered to
Registered MIHUser with
Candidate link
Available event
Delivered to
Registered MIHUser with
Candidate link
Available event
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L2 behaviors
L2 PDU
transmission
status
Average L2 PDU
length
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RT determination MIH can also
from L2, Success poll L1 and L2 on
or Failure,
User request
Local/Remote
trigger to MIH for
every specified
number of PDUs
RT determination
from L2,
Local/Remote
trigger to MIH
Delivered to
Registered MIHUser as
Link status
change event
MIH can also
Delivered to
poll L1 and L2 on Registered MIHUser request
User as
Capability
Response event
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L1/L2 behaviors
Error rate (BER,
FER, BLER, PER)
(Definition varies
for each Access
e.g.802.11,16,
WCDMA,CDMA2
000)
RT determination
from L1 and L2,
notified as local
trigger to MIH
Frame Retry Count RT determination
from L2, Local/
Remote trigger to
MIH
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MIH
can also
poll L1 and L2 on
User request
Delivered to
Registered MIHUser as
Capability
Response event
MIH can also
poll L1 and L2 on
User request
Delivered to
Registered MIHUser as
Link Status
Change Event
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L1/L2 behaviors
Link Bandwidth RT or Non-RT
determination,
Part of new link
found trigger
QoS indicators
(e.g. NAV)
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Notified by L1/L2
to MIH as part of
link attributes
MIH can also poll
on User request
Delivered to
Registered MIHUser with
Candidate link
Available event
RT determination MIH can also poll
from L1/L2,
L1 and L2 on User
Notified as local request
trigger to MIH
Delivered to
Registered MIHUser as
Capability
Response event
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