1. IEEE 802.21 MEDIA INDEPENDENT HANDOVER
DCN: mrpm
Title: MRPM PAR/5C LB#3 Comment Resolutions
Date Submitted: November 11, 2008
Presented at IEEE session #29 in Dallas
Authors or Source(s):
Junghoon Jee(ETRI), Dennis Edwards(CoCo Communications), Anthony Chan (Huawei), Bryan Lyles (Telcordia), Yeonkwon Jeong (GSU)
Abstract: This contribution summarizes the updated parts in new MRPM PAR/5C document, from the previous by resolving the LB#3 comments and also newly arrived comments during group discussion

2. IEEE 802.21 presentation release statements
This document has been prepared to assist the IEEE 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 right to add, amend or withdraw material contained herein.
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’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 outlined in Section 6.3 of the IEEE-SA Standards Board Operations Manual < and in Understanding Patent Issues During IEEE Standards Development

3. Abstract IEEE 802.21 WG LB#3 MRPM PAR&5C: 21-08-0250-06
Comments:
Revised MRPM PAR&5C:
MRPM SG worked at Monday PM2 session
Adhoc efforts on Monday evening and night
The contribution covers all the previous contributions , ,
This contribution summarizes the updated parts in new MRPM PAR/5C document, from the previous by resolving the LB#3 comments and also newly arrived comments during group discussion

4. 5.2 Scope of Proposed Standard
Old
New
This amendment shall define mechanisms for reducing power consumption of multi-radio mobile devices. (Does this include both IEEE and 3GPP radios or only IEEE radios?)
Enhancements to the MAC/PHY of individual access technologies for making them more power efficient are outside the scope of this project. (How about any enhancements to elements beyond access network…are they required? Are they in scope or out of scope of this amendment?)
This amendment shall define mechanisms to reduce power consumption of multi-radio mobile devices on heterogeneous IEEE compliant networks. Enhancements to the MAC/PHY of individual access technologies for making them more power efficient are outside the scope of this project.
BLACK: Old texts from
RED: Comments from
BLUE: New texts in

5. 5.3
Is the completion of this standard dependent upon the completion of another standard: No

6. 5.4 Purpose of Proposed Standard
Old
New
The purpose of this amendment is to reduce power consumption of multi-radio mobile devices by utilizing information from a network in a media independent manner. (Is this new information that will be defined on the network side or does this information already exist? If it already exists is this information not being made available today? Is information the only means or are their other means as well by which power consumption will be reduced)
The purpose of this amendment is to enhance the user experience by extending the battery operating life of multi-radio mobile devices.

7. 5.5 Need for the Project Old New
As multi-radio mobile devices become popular, there is a need to improve their power efficiency, for example by putting a subset of radios in standby or off modes.
A mechanism is needed to coordinate each radio operation of multi-radio mobile devices with network support in a media independent manner. (What is meant by network support here? Is it access network support or core network support? Does this include both 3GPP and non-3GPP networks?)
As the number of multi-radio mobile devices increases, so does the need to improve the device battery life. While platform and network specific power managers exist, they operate independently without considering the overall power consumption of a multi-radio mobile device. This project will enhance battery life by providing a power management framework that enables control of multi-radio power states depending on each radio’s power consumption characteristics and each radio’s network accessibility at the current location.

8. 8.1 Additional Explanatory Notes
Old
New
(5.2 Scope) The study group has investigated the following mechanisms:
providing a new IEEE service to facilitate power management of a multi-radio mobile device (facilitating power management is quite ambiguous. Suggest delete this or explain in a couple of sentences.)
enhancing power management policies for example by utilizing mobile device throughput and energy consumption parameters (These parameters are already available to mobile nodes and can be made available to network components as well. Do we really need a new standard for this?)
addressing how to improve out-of coverage area multi-radio power management (out of coverage area multi-radio power management is not very clear. Suggest using couple of sentences to describe what it is and how it is different than the IS?)
Is this section needed? (yoshi)
All texts are removed.

9. 17.5.1 Broad Market Potential (1/2)
a) Broad sets of applicability
(OLD)
For multi-radio devices the IEEE has defined three media independent handover services: information, command, and event services. These services should be extended to improve the power efficiency for multi-radio mobile devices. The extended services are applicable to use cases beyond handover such as minimizing overall power consumption when multiple radios are in idle mode of operation, avoiding redundant location update across multiple radios at same time, out-of-coverage area power consumption (out of coverage area part is not clear as to what it means).
Several more remedies to enhance texts were proposed.
(NEW)
Today, mobile phones and other handheld communication devices are often equipped with two or more access technologies such as WiFi (e.g., IEEE a/b/g/n), WiMax, CDMA, UMTS, GSM, Bluetooth, each with its own power management mechanisms. Terminal power consumption, and corresponding battery life, are make-or-break adoption factors for any mobile access technology.
One major bottleneck in the implementation of multi-mode terminals is the overall power management mechanism for different radios, each with its own mechanism. We expect multi-radio devices to depend on services that should be extended to improve the power efficiency of multi-radio mobile devices.

10. 17.5.1 Broad Market Potential (2/2)
b) Multiple vendors and numerous users
The second sentence is not relevant to question
(OLD)
A wide variety of vendors are currently involved in building numerous wired and wireless products for the network equipment and mobile device market segments. It is expected that the majority of those vendors and other organizations, will participate in the standards development process and subsequent commercialization activities.
(NEW)
A wide variety of vendors are currently involved in building numerous wired and wireless products for the network equipment and mobile device market segments. With the number of combo handset sales alone increasing from 6 million in 2006 to 190 million by 2011, affected market categories include smart phones, fixed-mobile convergence, laptops – essentially anything with multiple radios. Vendors, operators and users are all affected by this multi-network device trend.

11. Distinct Identity
a) Substantially different from other IEEE 802 standards.
(OLD)
Existing wireless access technologies provide power management within their own isolated individual operation by applying techniques such as idle mode operation, paging, location update, and out-of coverage area detection (What is out of coverage area detection?).
However, there are no IEEE 802 standards to support multi-radio power management for multi-radio mobile devices operating in heterogeneous networks. Multi-radio power management deals with IEEE 802 networks as well as cellular networks. (Do we really mean cellular networks here? What enhancements are expected for 3GPP networks? Do participants really feel they are up for doing something in 3GPP? Is this feasible given that 3GPP operates in its own way and is already doing many of these things across 3GPP radio technologies?)
(NEW)
Existing wireless access technologies provide power management within their own isolated individual operation by applying techniques such as idle mode operation, paging, and location update. However, no IEEE 802 standard supports multi-radio power management across heterogeneous networks unified by IEEE

12. 17.5.4 Technical Feasibility
In 3rd Paragraph
(OLD)
Methods of coordinating the operating modes of multi-radio interfaces as well as comparing the relative energy consumption of those radio interfaces can be defined as extensions of IEEE which is an extensible protocol and which supports multiple radio interfaces. Consequently the amendment is technically feasible. (disagree with the reasoning here. If there is any kind of co-ordination required between network elements beyond access networks (i.e. in core-network) then it is a significant challenge and technical feasibility needs to be understood/explained.)
(NEW)
Methods of coordinating the operating modes of multi-radio interfaces as well as comparing the relative energy consumption of those radio interfaces can be defined as extensions of IEEE which is an extensible protocol and which supports multiple radio interfaces.

13. 17.5.4 Technical Feasibility (2/2)
Added a new paragraph at the end
There may be a tradeoff between the service availability of always-on connectivity and battery life. Yet existing platform and network specific power managers that operate independently without considering the overall power consumption of a multi-radio mobile device may result in shortened battery operation life, which according to user experience is contradictory to a reliable service. This project to enhance battery life is trying to enhance such user experience. In addition, no specific new hardware technology is introduced, so hardware reliability should not be an issue.

14. 17.5.5 Economic Feasibility (1/2)
In 2nd paragraph
The functionality that would be described in this amendment will reduce power consumption, but it represents only a marginal increment to the baseline implementation of IEEE and does not represent an originating cost. (If network co-ordination is required within core network (say across 3GPP and IEEE technologies) it could represent a significant challenge and hence cost. There may be specific use cases where this may be viable. Identifying those may help in wording this better and making this more convincing. You may also be asked as to why this is not more appropriate for other SDOs (that do more core network stuff) to do it…like 3GPP or WiMAX Forum as opposed to IEEE.)

15. 17.5.5 Economic Feasibility (2/2)
The previous second paragraph was deleted.
(NEW)
Cellular systems, IEEE , and IEEE systems provide real world examples of single-radio power management mechanisms within homogeneous networks at layers 1 and 2 (PHY and MAC) with known cost factors, cost of performance, and installation costs. The functionality described in this amendment will allow a uniform way for managing the power modes of such radios in combination.
Sections of this work simply represent an incremental cost in enhancing the baseline implementation of IEEE Additional costs will be incurred owing to facilitating network coordination. Where coordination with core network entities is required, the capital and operational costs should be similar to that of installing Mobile IP servers. Where coordination between the mobile device and access network is required, the capital and operational costs will be similar to that of installing an operating system utility at an access point.
IEEE is uniquely positioned to provide a coordinating role in radio power management. IEEE already provides a uniform set of services that work across heterogeneous networks. MRPM will inherit the deployment footprint of the base standard and is fundamentally related to handoff and QoS control. The proposed MRPM interactions with core network entities are a direct extension of those already required for secure handoff.