IEEE P802.22Wireless RANs
Wireless Regional Area Networks
Montreal SessionMay 2009
Mon. May 11th AM1 WG Opening Plenary
∙ The meeting was started at 10:45.
∙ The agenda for the session was approved.
- Since Carl Stevenson could not attend the session, Gerald Chouinard was the acting Chair for the May session.
- Apurva Mody was nominated to act as the secretary for the 802.22, 2009 May interim session.
Document 22-09-0083 containing the minutes of the last session was presented– Minutes for the last session were approved.
∙ Discussion took place on comments to the FCC and OFCOM.
∙ OFCOM Report - A contribution had been developed over teleconference calls and presented to 802.22 for contribution to the OFCOM request on Digital Divided. 802.18 reconciled the views 802.11 and 802.22 and sent it for approval to the EC and then to OFCOM.
∙ NoI on the National Broadband Initiative from FCC – 802.22 should consider responding since 802.22 has an important role to play in extending Broadband Access. A document was created for contribution to be send to 802.18. The reaction of 802.18 was that the response should be generic at this time and the more focussed document describing the capabilities of the 802.22 system was put aside. 802.22 provided comments on the generic text approved by 802.18.
∙ Gerald Chouinard informed the Working Group that an updated comment database had been uploaded to the mentor – Gerald explained the meanings of various colorings. The plan was to resolve most of the comments during the session and go for a new WG letter ballot after the end of the week.
Servers – Newton.events.ieee.org
802.22v1.5 is a detailed document with all the comments highlighted
802.22v1.6 is version with all the track changes removed and comments incorporated.
∙ IEEE Patent Policy was discussed and slides were shown. 15-09-0361
Apurva Mody brought to the attention of the group that Wendong Hu in the Co-existence conference calls mentioned that there is a company that is not part of the 802.22 WG that has some IP on the use of a beacon for co-existence. Since 802.22 is considering similar mechanism, the chair asked Wendong to approach that company or give him the coodinates of the company in order to seek an LoA.
∙ New electronic IEEE Attendance Tool was explained.
∙ Status of the TG1 sponsor ballot: Ballot passed with 90% support. Some 80 comments need to be resolved.
Gerald Chouinard asked if there were any new members. Following new members joined the 802.22 Working Group:
Vijay Patel - Andrew Corporation
Victor Hou - Broadcom
Paul Lambert - Marvell
∙ Gerald Chouinard asked for status from various ad-hocs and 802.19 TV Whitespaces Co-existence Group.
o Steve Shellhammer – 802.19 – Main activity on study group on TV WS Co-existence. Steve announced the Formation of the document on use cases and co-existence scenarios – Discussion will take place on what to do after July.
o Gerald is to lead the discussion on the PHY Re-consideration for advanced modulation and coding, and decision on the RF Mask
o Wendong Hu - MAC section: most comments are resolved
o Apurva Mody - Security – Plan to discuss Document 22-08-0174 Rev 18 so that it can be included in the 802.22 Draft Standard
o Winston Caldwell - Database and Policy Engine will be discussed in TG2– No comments remains to be resolved
o Apurva Mody – Cognitive Radio Capability – Section 9 – Plan is to re-organize Section 9 for a better flow. Resolve the remaining comments so that 802.22 can move to Draft 2.0
∙ Victor Tawil and Winston Caldwell announced that a Coalition of 30 members – Incumbents, Manufacturers, Broadcasters are working on standardizing the Geolocation Database Architecture, Functions and Interfaces.
Opening Plenary came to a close at 12:00
Mon. May 11th PM1 Systems Issues
∙ PM1 Systems Issues was chaired by Gerald Chouinard.
∙ The discussion was centered around how to organize the week to resolve most comments.
∙ Some system issues were addressed so that te more detailed discussions can take place in the different ad-hoc groups during the week.
Mon. PM2 WG Security
∙ Apurva Mody chaired the PM1 session on security
∙ Apurva Mody discussed the progress made on incorporating security mechanisms in 802.22, and pointed the group to Document 22-08-0174 Rev 18 which contained Recommended Text for Security in IEEE 802.22. The document contains proposed changes to Sections 6, complete revision of Section 7 and also some proposed changes to Section 9, for adding security to the cognitive plane.
Apurva provided the executive summary of the progress made by the security ad-hoc and also went over the Document 22-08-0174 Rev 18.
Document 22-08-0174Rev18 contains complete revision to security in 802.22. The document also resolves all the comments related to Security in Draft v1.0.
This document proposes security mechanisms with their corresponding MAC messages for non-cognitive as well as cognitive functions in 802.22 as requested by the resolution of Comment 260. Document 22-08-0121 was also related to this question. Security Mechanisms for Non-Cognitive Functions - Security ad-hoc has reviewed, revised and updated the MAC management messages related to security. These messages can be found in Document 22-08-0174 Rev 18. Security ad-hoc has taken parts of PKMv1 and parts of PKMv2 from IEEE 802.16-2009 standard that are relevant to 802.22 operation and re-named the protocol as the Security for Control and Management (SCM). The SCM protocol does not include EAP for the sake of simplicity since the current version of the 802.22 standard does not support mobility. SCM supports Elliptic Curve Cryptography (ECC) based authorization for authorizing the CPEs at the time of network entry, for authenticating the TG1 beacons and for authentication of the CBP burst. SCM supports RSA and ECC based X.509 certificates. The current proposed security mechnisms do not include HMAC/ CMAC, but instead a robust AES-CCM based authentication and encryption scheme is suggested. This can be found in Section 7.4 of the Document 22-08-0174 Rev 18. The proposed security mechanisms for 802.22 DO NOT use DES encryption scheme. Neither do they support AES in CBC mode. Only ONE ROBUST encryption scheme is proposed which is AES (128) - CCM. Security Mechanisms for the Cognitive Functions - Since some cognitive plane security related mechanisms are an integrated part of other cognitive functions such as Spectrum Sensing Function, Geolocation, Spectrum Manager, Spectrum Automaton or the Management Plane procedures and functions, Section 7.6 briefly describes the required security mechanisms and provides references as to where in the IEEE 802.22 standard they can be found. Detailed description of the mechanisms themselves have been provided in appropriate sections such as Sections 6 related to MAC, Section 7 related to Security, Section 9 related to the Cognitive Radio Capabilities etc. These security functions are related to availability, authentication, authorization, identification, integrity, confidentiality / privacy, etc. The security ad-hoc also proposes collaborating sensing, correlation with the geolocation information and decision-making based on voting based rule sets to enhance security for WRAN systems and the incumbents. This mechanism is explained in greater detail in Section 9 on Cognitive Radio Capability (Missing Sections - Comment 735 - Response in Document 22-09-0057) of the IEEE 802.22 Draft Standard. Some other security mechanisms related to the cognitive capability that are defined in greater detail include Section 7.7.2 related to the CBP Authentication Mechanisms and Section 7.7.3 related to the 802.22.1 Wireless Microphone Beacon Authentication.
The proposed document 22-08-0174 Rev 18 also introduces a New Annex on some theoretical results related to Collaborative Sensing and Decision Making to Provide Protection Against Spurious Signals.
∙ Following this presentation, the floor was open to discussions
∙ Some comments related to security in 802.22 were raised as follows:
o Ivan Reede – would like 802.22 to have capability to Self generate certificates so that ISPs do not have to deal with a third party for certificate generation and authentication. Ivan would like to use methods similar to the Extensible Authentication Protocol (EAP). Apurva responded that the security ad-hoc will look into providing a self-generating keys / certificates capability for 802.22.
o Ivan Reede enquired about the complexity of this security overhead and whether an LOA would be required for the AES-128.
o Paul Lambert indicated that AES-CCM does have vulnerabilities – PN sequence repetition and AES-CCM Key wrap. One of the biggest vulnerabilities is in the nonce generation.
o Paul suggested that IEEE 802.22 look at AES-GCM
o Paul Lambert asked as to how does Secure Control and Management proposed by 802.22 differs from PKMv2. Apurva responded that there is no difference except for a name change. IEEE 802.22 has taken parts of PKMv1 and PKMv2, and since in the end it had best combinations of both, the name was changed to SCM.
o Paul Lambert – 802.22 uses Session based keying or Message based keying.
Ivan Reede asked if anyone has done any Simulations to show that the proposed security mechanisms will work
∙ At the end of the Session on Security, Apurva Mody proposed that 802.22 make a motion to adopt the Recommended Text for Security in 802.22 – contained in Document 22-08-0174 Rev 18 to be included in Draft v 2.0 of the IEEE 802.22 Standard
∙ The group decided that this motion should be made on Wednesday, PM1 Systems issues.
Tues AM1 MAC – Clause 6
∙ Wendong Hu chaired the MAC ad-hoc group and continued discussing comments related to section 6.
∙ Many comments related to MAC and co-existence issues were resolved.
Tues AM2 MAC – Clause 6
∙ Wendong Hu chaired the MAC ad-hoc and continued the discussion on section 6.
∙ Many comments related to MAC and co-existence issues were resolved.
Tues PM 1 MAC
∙ Wendong Hu chaired the MAC ad-hoc and continued the discussion on section 6.
Tues PM 1 TG1 Tiger Team
∙ Victor Tawil chaired the TG1 Tiger Team meeting. Annex F on the TG1 decoding was completed and the remaining comments to the Draft on the TG1 decoding were resolved.
Tues PM 2 Systems
∙ Gerald Chouinard chaired the systems issues session.
∙ Gerald asked if we should break up the standard into 5-6 pieces and vote on these parts in subsequent versions of the Strandard as was done in other 802 WGs..
∙ Stephen Kuffner – Are the clauses inter-dependent? Gerald, if the Clauses have the necessary ‘hooks’ to talk to each other –they can be worked upon independently.
∙ Ivan – It is important to make parts of the document stable. That way at least for example PHY is done and we devote time to MAC.
∙ There were discussions on how the standard should be divided to quickly move forward.
The main parts of the Drafts are as follows:
- Clauses 1-5 Overview, Normative References, Definitions, Abbreviations and Acronyms, Packet Convergence Sublayer
- Clause 6 – MAC
- Clause 7 – Security
- Clause 8 – PHY
- Clause 9 – Cognitive Radio Capability
∙ Bob Heile told Gerald that the standard has to be self-contained to be approved at the Sponsor level.
∙ Gerald – Perhaps the Spectrum Manager could come in Rev. 2 of the Standard but that would require a PAR modification since the current PAR defines 802.22 as a cognitive radio standard.
∙ Winston Caldwell is supportive but not completely comfortable with this idea. We have achieved a lot since last time. We seem to have broad consensus on the entire Draft. The entire Draft nees to be balloted and we will see from the comments received how to go about it.
∙ Gerald says that there are some issues that will take longer to resolve than others and this ‘segmentation’ of the standard approval would allow the group to speed up the approval process for the portions that are ready.
∙ Winston – suggests the Letter Ballot 2 to cover the entire Draft. Comments could then be resolved for certain sections and have these re-circulated.
∙ Ivan Reede – People are confused between a ballot and what is required by the PAR.
∙ Victor Tawil suggested that Clauses 6, 8 and 9 be considered together.
∙ Various straw-polls were conducted on how the standard should be broken up for quick consensus and approval, but there were no clear directions on the preference of the Working Group.
∙ Gerald suggested that we continue the discussions in Wednesday, Systems Issues session.
Wednesday, AM1 Spectrum Manager
∙ Apurva Mody chaired the Spectrum Manager session. Many comments related to Section 9, Cognitive Radio Capability ad-hoc were discussed.
∙ The comment resolutions can be found in the following document
https://mentor.ieee.org/802.22/dcn/09/22-09-0066-02-0000-proposed-resolutions-to-comments-section9.doc
Wendesday, AM2 MAC
∙ Wendong Hu chaired the MAC Session
∙ Many comments related to Section 6, MAC and co-existence issues were resolved.
Wednesday, PM1, Systems Issues
∙ This session was chaired by Gerald Chouinard
∙ Following motions were made during this session.
Motion TM-09-17
To adopt the Recommended Text for Security in 802.22 – contained in Document 22-08-0174 Rev 18 proposed by the Security Ad-hoc to be included in Draft v 2.0 of the IEEE 802.22 Standard as a proposed resolution to all the security related comments.
Move: Apurva N. Mody
Second: Winston Caldwell
Motion Passes – Unanimously.
Motion PM-09-12
Move to launch the second WG letter ballot based on the 802.22 Draft version 2.0 no later than May 29th for a period of 40 days.
Move: Apurva N. Mody
Second: Gwangzeen
Motion Passes Unanimously
Discussions took place on the possibility of breaking the ballot process into multiple clauses. Winston suggested to wait for the right information from the ballot process before taking any decision. The second WG letter ballot should be launched for the entire Draft and if it turns out that MAC and PHY have received 90% approval but other sections have received 65% approval, then, to proceed quicker toward a standard, consideration of the broken sections could be relegated to later versions of the standard.
Straw Poll – Most people prefered grouping PHY, MAC, Clauses 1-5, and Clause 9 on Cognitive Radio to make an integrated standard. However, straw poll indicated that no clear consensus would be reached if such a motion was made. It was confirmed that the second WG letter ballot should deal with the entire Draft 802.22v2.0.
Wednesday, PM2, Spectrum Manager
∙ Apurva Mody chaired the Spectrum Manager session. Many comments related to Section 9, Cognitive Radio Capability ad-hoc were discussed.
∙ The comment resolutions can be found in the following document
https://mentor.ieee.org/802.22/dcn/09/22-09-0066-02-0000-proposed-resolutions-to-comments-section9.doc
Thursday AM1, Spectrum Manager
∙ Apurva Mody chaired the Spectrum Manager session. Many comments related to Section 9, Cognitive Radio Capability ad-hoc were discussed.
∙ The comment resolutions can be found in the following document
https://mentor.ieee.org/802.22/dcn/09/22-09-0066-02-0000-proposed-resolutions-to-comments-section9.doc
Thursday AM2, MAC
∙ Wendong Hu chaired the MAC Session
∙ Many comments related to Section 6, MAC and co-existence issues were resolved.
Thursday AM2, TG2 Recommended Practice
∙ Winston Caldwell chaired the TG2 Session
∙ Meeting minutes can be found at
https://mentor.ieee.org/802.22/dcn/09/22-09-0103-00-0002-tg2-minutes-may-08.doc
Thursday PM1, Spectrum Manager
∙ Apurva Mody chaired the Spectrum Manager session. Many comments related to Section 9, Cognitive Radio Capability ad-hoc were discussed.
∙ The comment resolutions can be found in the following document
https://mentor.ieee.org/802.22/dcn/09/22-09-0066-02-0000-proposed-resolutions-to-comments-section9.doc
Thursday PM2, PHY
∙ Gerald Chouinard chaired the PHY session.
∙ The ad-hoc group chair had prepared a status of the PHY discussions as a list of comments still needing attention. This list is contained in document #09-90r1.
∙ The requirement coming from the previous session regarding the reduction of the number of coding/modulation modes in the DIUC and UIUC Tables to 16 was found to be impossible. To achieve this, all advanced coding schemes would need to be removed.
∙ Comments related to Spectral Mask were resolved by including the RF mask proposed in the FCC R&O 08-260 as a basis for discussion even though, at the end the RF mask will be decided by the local Regulatory Autorities wherever the 802.22 systems are operated.
Thursday Evening, System
∙ Gerald Chouinard and Apurva Mody chaired the session.
∙ Comments related to Section 9, Cognitive Radio Capability ad-hoc were discussed.
∙ The comment resolutions can be found in the following document
∙ https://mentor.ieee.org/802.22/dcn/09/22-09-0066-02-0000-proposed-resolutions-to-comments-section9.doc
∙ Most of the remaining comments related to MAC and co-existence were resolved.
Friday, AM 1,
Motion:
Move to approve all MAC related Comments
Move – Ivan
Second – Victor Tawil
Discussion – Gerald expressed concerns about the fact that the WG had not reached appropriate resolutions for all the MAC comments and if we want to pass this motion, a list of the specific comments that it relates to would need to be developed
Winston – Same concern as Gerald.
Motion to Table - The motion taken as friendly by Ivan Reede.
Friday 10.00 a.m.
Motion PM-09-13
Move to Empower the Editor to Propose and Post the Resolutions to the Remaining Approved Comments via the E-Mail Reflector and Implement these resolutions if no objection is received.
Move – Ivan Reede
Second – Winston Caldwell
The motion was approved unanimously.
Friday, May 15th 2009 AM2, Closing Plenary
∙ Gerald Chouinard chaired the closing plenary
∙ Apurva Mody brought to the group that LoA is needed related to CBP Packets.
∙ Gerald informed the group that a Letter of resignation had been received from Carl Stevensen, the Chair of IEEE 802.22
∙ Gerald informed the group that he will not run for the Chair but will continue as the Vice Chair.
∙ Gerald will ask Mat Sherman for help on the procedure the nomination of candidates and the election of the chair. He noted that a letter of support from sponsor will be needed for the EC to confirm the new chair.
∙ Anyone is welcome to become candidate for te election which will be held during the July Plenary session.
∙ Gerald informed the group that Draft 1.7 is posted on the local reflector
∙ Gerald also informed the group that the last version of the comment resolution spreadsheet on the local server – 22-08-0146 Rev 39 has been uploaded. The spreadsheet can be found at
https://mentor.ieee.org/802.22/dcn/08/22-08-0146-39-0000-wran-draft-1-0-draft-comments-database.xls
Motion TM-09-18:
Move that the working group approves the resolutions of all the comments that have been resolved by the ad hoc groups and the working group during and since the end of the plenary sessiong in March 2009:
Resolutions are contained in Documents 22-08-0146 Rev 39, 22-09-0066 Rev 02, 22-08-0174 Rev 18, 22-09-0061 Rev 4, 22-09-0098 Rev 0, 22-09-0077 Rev 0, 22-09-0097 Rev 0
Move: Ivan Reede
Second: Victor Tawil
Discussions - None
The motion was approved unanimously.
∙ to the opic of breaking the Draft in multiple threads was brought back for further discussions.
∙ Winston Caldwell suggested to tally the results of the letter ballot for the various sections as a follow-up to the letter ballot rather than breaking-up the Draft.
∙ Steve Shellhammer indicated that this would not speed things up but could give more visibility on the advancement of the 802.22 standards process for public relations.
∙ The concusion from the group was that there is no need for a motion
∙ Future Plans:
∙ Ivan Reede asked Gerald to put a plan to complete this draft and present it during the July session. Project management is essential for the continuation of the work in 802.22.
Reports from the Ad-hoc groups
∙ TG2 Report – Winston Caldwell - Very good meeting. More people from the group attended. Useful discussions were held
∙ PHY – Section in good shape – most comments resolved
∙ MAC – Resolved comments – Further telecons – perhaps not necessary. Wendong Hu would like to take a break and re-start conference calls after July
∙ Co-existence – Many comments resolved- Further telecons – perhaps not necessary. Wendong Hu would like to take a break and re-start conference calls after July
∙ Security – Apurva Mody – The entire section on Security in 802.22 has been re-vamped. Security ad-hoc received useful comments which they will act upon. Winston Caldwell wants the security ad-hoc group to consider the security mechanisms for the database interface to protect the information going to and fro from the database to the IEEE 802.22 system. Apurva Mody suggested that teleconference calls must continue.
∙ Cognitive Radio Capability – Apurva Mody – Much progress was made on Section 9 to resolve the comments as well as to re-vamp the section so that it read better and fill out the missing sections and details. However much work still remains. Apurva Mody suggested that teleconference calls must continue.
∙ TG1 – Victor Tawil - Work is done
∙ Gerald indicated that the WG letter ballot will be launched according to the above motion using Excel Spreadsheets rather than the comment tool used for the first WG letter ballot since it is easier to include formatting in the comments and it will be easier to integrate the comments in a database for the july ssession.
∙ Out of 35 voters, 50% need to vote and out of that, 75% need to pass. [Later onsultation of the 802.22 P&P seem to indicate that 75% return rate is required.]
∙ People can put in links in Excel to input contributions rather than large texts in te comments.
∙ Apurva Mody suggested that a task for the new chair will be to talk to various companies and see why they have left 802.22 and try to bring them back in.
∙ Apurva Mody suggested potential partnership with SCC41 / P1900 to divide the workload on cognitive radio capabilities.
∙ Winston Caldwell suggested that 802.22 needs a liaison with the Google group dealing with the Incumbent Database.
∙ Gerald Chouinard suggested that we also need a liaison with P1900.
∙ Steve Shellhammer reported in the activities that took place during the week in 802.19 Recommendations were developed for procedures in TV White space as well as recommendations for possible methods for co-existence.
11.40 p.m.
Motion PM-09-14:
Move to close the Montreal May 2009 session.
Move: Gerald Chouinard
Second: Apurva Mody
Motion Approved Unanimously
Montreal Plenary SessionMay 2009
Note: Participants who had voting status appear in bold.
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