Gidon Reid (BT), Daniel Wenger (Swisscom), Hans Einsiedler (DT), Marijo Eliseeff (Globe), Jin-
Young Hong (KT), Frank Zdarsky (NEC)
What follows is a collection of use cases contributed from members of the Fixed
Mobile Convergence Alliance (FMCA), which are likely to benefit from MIH services.
These use cases are being shared with the IEEE 802.21 WG for discussion and to help them develop an appropriate document (e.g., test specifications) from the published IEEE 802.21 Standard that can be used by participants of an FMCA
Interoperability Event, open to FMCA members, IEEE members and other invited parties, to be held in October 2009 (tbc).
These use cases have been approved by FMCA members participating in the MIH
Special Interest Group, for sharing with the IEEE.
These use cases have been summarized for this submission. The full report can be obtained from gidon.reid@bt.com
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This document has been prepared to assist the IEEE 802.21 Working Group. It is offered as a basis for discussion and is not binding on the contributing 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 contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE
802.21.
’ s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE ’ s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by
IEEE 802.21.
’ s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE ’ s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE
The contributor is familiar with IEEE patent policy, as stated in
IEEE-SA Standards Board bylaws
< < http://standards.ieee.org/guides/bylaws/sect6-7.html#6 > and in
Understanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/faq.pdf
> >
Section 6 of the
> and in
Understanding Patent Issues During IEEE Standards Development
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•
Customer need / problem:
– The customer expects being always best connected to the different networks of his operator at any place (ABC Always Best Connected). If different access technologies are available he/she has to make a choice which is of no interest to her/him whereas often alternative networks are not even discovered because the interface on the device is switched off for battery power saving reasons. The operator prefers to control the user's point of attachment in order to perform network optimisation (e.g. load, operation costs...)
•
Detailed service description
– The user expects to seamlessly being connected by the operator's networks to the internet.
Operator's network selection on the end device is performed completely transparently without user interaction. Active communication (voice and/or data) continues without interruption data communication is handed over simultaneously.
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• Customer need / problem:
– User starts a voice call on the 3G cellular network. They then walk into coverage of a public
WLAN hotspot. The call is handed-over to WLAN. As far as the user is concerned, the call just continues seamlessly – except (possibly) for a change of tariff indication (e.g. beep or
LED). As the user begins to lose their WLAN signal the call is handed back seamlessly to
3G.
•
Detailed service description
– The user has a multi-mode device with 3G, WLAN and GPS radios, capable of making voice or voice/video calls. To save battery consumption only the radios that are required to be active are switched on. The device is able to communicate with an IEEE 802.21 (MIH)
Information Service on the network to retrieve information on what networks are available to them at their current location. Their current location is provided by GPS and the information request is sent via whatever interface the device currently has active. The user begins the call on the 3G network. The device discovers from this MIH information request the location of the WLAN hotspot. When the device enters coverage of the WLAN hotspot, the WLAN radio is switched on and the MIH Command Service hands the call over seamlessly to this
WLAN network at the physical layer. Session continuity is handled at a higher layer, for example using SIP.
– As the WLAN signal deteriorates, the MIH Event Service provides this information to the client. Through knowledge from the MIH Information Service that the only network available with the loss of WLAN is 3G, the MIH Command Service hands the call back to the 3G network again.
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Customer need / problem:
– A user on a 3G cellular network has an ongoing voice call and is concurrently watching a video that is streamed and buffered on demand to the same terminal. When the user has coverage of a public WLAN hotspot, the resource-consuming but less time-critical video stream is handed over to the WLAN hotspot, while the voice call is still received via the 3G network.
•
Detailed service description
– The user has a multi-mode device with 3G and WLAN and begins a voice call on the 3G network. During the conversation, the user is offered to watch a video and decides to start streaming it to the same device. Through localization and MIH information Service requests, the network discovers that the user has entered the coverage area of a public WLAN hotspot or a home WLAN access point. Using the MIH Command Service, the WLAN radio is switched on and only the video stream is seamlessly handed over to the WLAN access point in order to off-load resource-intensive traffic from the cellular network. At the same time, the voice call is continued over the 3G network to maintain a higher service quality.
– As the voice call on the 3G network is ended, the video continues to be streamed via the
WLAN hotspot until all remaining video data has been buffered on the terminal or until the user leaves WLAN coverage range and the video transfer is handed back to the 3G network.
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•
Customer need / problem:
– In scenarios, in which the backhaul between a point of attachment and the core network constitutes a temporary or permanent bottleneck, the delivered service quality can be increased by incorporating (information on) this constraint to improve mobility and resource management.
• Detailed service description
– The user expects the best-possible service quality without worrying about the type of access or the point of attachment. Some points of attachment may have sufficient access capacity, but the backhaul may be a bottleneck. Examples of resource-constrained backhauls are access points or femto cells in user homes with xDSL uplinks that share capacity with local network services. A further example is wireless backhauls (for rural areas or for short-term deployments). Such constraints should be considered during MIH, no matter whether mobile or network controlled.
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•
Customer need / problem:
– Customer requires flexibility of service usage while changing locations (e.g. in the house) or going abroad. Besides session should continue seamlessly without loosing connection, picture frames, etc., and the transfer should be as easy as possible: one click or even automatically using sensors or context information. Service adaptation should be supported based on availability of networks, network resources, and devices (e.g. splitting audio & video stream) too.
– Other considerations: Customer may already own a “home hub” which provides several access technologies and services such as - WiFi, Fixed access (xDSL), IPTV, VoIP capabilities within the home environment.
• Detailed service description
– A user has a VoIP video call at a fixed IPTV set at home connected via xDSL. He/she wants to leave the house. Therefore, a transfer of the current video call has to be made to his/her mobile device using the in house WiFi network. The session will be reduced to an audio conference only, because he/she wants to drive with his/her car afterwards and video call on the mobile device while walking does not make sense.
– While being in the car the session (audio call) will be transferred to a wide area network
(WAN), such as UMTS (data transfer mode, VoIP client on the UMTS-device). In house (fixed and wireless) & WAN being operated by one telecommunication operator and will host also other services. The handover is controlled by the network operator and triggered by context information of the user/customer management by the network operator (profile) and by network resource management and network context information (IEEE 802.21 information).
Currently WiMAX is not considered as a home access technology.
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•
Customer need / problem:
– In wireless overlay environment, customers want to connect a suitable network in accordance with application's requirements.
• Detailed service description
– There is a user who is using instant messenger on 3G network. As soon as the user turns on a mobile IPTV application, the connection does handover to WIMAX, because streaming applications demand stringent bandwidth, delay and jitter requirements to play clearly.
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Customer need / problem:
– How to manage multiple simultaneous sessions (data, voice & mobility) while roaming across various access technologies.
• Detailed service description
– Ability to roam seamlessly across various access technologies while performing on-going
(and newly initiated or termination of) data/voice session/s. E.g. data download / file transfer during an on-going multiple party call with video streaming, etc.
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