On the Objectives and Scope of the WS Coexistence PAR July 2009 doc.: IEEE 802.19-09/xxxxr0 September 2009 On the Objectives and Scope of the WS Coexistence PAR Date: 2009-09-21 Authors: Notice: This document has been prepared to assist IEEE 802.19. 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. Ari Ahtiainen, Nokia Ari Ahtiainen, Nokia

July 2009 doc.: IEEE 802.19-09/xxxxr0 September 2009 Abstract This presentation deals with the positioning, scope and objectives of the 802.19 Coexistence PAR. Some comments and a text improvement on the scope and objectives of the PAR are provided. Ari Ahtiainen, Nokia Ari Ahtiainen, Nokia

Outline How to position Coexistence in 802 September 2009 Outline How to position Coexistence in 802 Scope of the Coexistence PAR Networks and Devices Comments on some scoping aspects Objectives of coexistence Network Discovery Communication Spectrum Use Rules Summary Ari Ahtiainen, Nokia

Coexistence for WS Radios September 2009 Coexistence for WS Radios Multiple independent 802 stations using the 802.19 coexistence support 802.x WS SME 802.11 WS 802.22 WS SME SME 802.19 Coexistence Support Ari Ahtiainen, Nokia

Networks and Devices Network – set of nodes, i.e. devices September 2009 Networks and Devices Network – set of nodes, i.e. devices organized hierarchically with centralized decision making, e.g. a cellular RAN and an infrastructure BSS organized without hierarchy with distributed decision making, e.g. IBSS and MBSS (802.11s) Device end user terminal or client device may act as an autonomous node in a network multiradio device may have association with multiple networks at the same time => device may participate into coexistence scheme also as an autonomous actor Ari Ahtiainen, Nokia

Comments on PAR Scoping Aspects September 2009 Comments on PAR Scoping Aspects Coexistence between 802 radios or 802 and non-802 radios Logical and physical control channels Sensing with or without silence periods Ari Ahtiainen, Nokia

September 2009 PAR Scope – 802 and non-802 Coexistence solution is primarily needed for dissimilar 802 radio technologies, such as the 802.22 and the future WhiteSpace variants for .11 and .16 However, it is useful and will strengthen the IEEE position as a Standards Making Body to address also non-802 radio technologies, which may be developed either for the FCC regulated White Space frequencies or for White Space bands in other regulatory domains => both are needed Ari Ahtiainen, Nokia

PAR Scope – Logical and Physical September 2009 PAR Scope – Logical and Physical Logical channel as a carrier of coexistence control info can be a backhaul connection, such as wired Internet can be another radio, such as Wide-Area Radio for Internet connectivity Well-known issues (NAT, Firewalls) complicate end-to-end connectivity between TVWS networks and devices Physical channel as a carrier of coexistence control info dedicated narrowband control radio requires regulation to allocate frequencies => both are needed Ari Ahtiainen, Nokia

PAR Scope – Silence Periods September 2009 PAR Scope – Silence Periods Spectrum sensing without coordinated silence periods how to distinguish between primary users (wireless microphones) and other secondary users Spectrum sensing with coordinated silence periods allows sharing of the sensing responsibilities between TVWS networks/devices facilitates the detection of primary users => coordination is needed Ari Ahtiainen, Nokia

Objectives of Coexistence Solution September 2009 Objectives of Coexistence Solution Discovery Communication Spectrum Use Rules Ari Ahtiainen, Nokia

Objectives of Discovery September 2009 Objectives of Discovery Discovery of other secondary users targeted to discover other secondary user WS networks with which coexistence is necessary discovery mechanism may also significantly improve the efficiency of discovering other WS networks as potential communication partners Text improvement proposal on 802.19 PAR proposal: “Discovery Process assists TVWS device to find networks and their operating parameters. This information is used for co-existence and can improve the initial network discovery. The co-existence mechanism can be used by the TVWS device to determine its own operating parameters as perceived by others, to establish it’s own network” Ari Ahtiainen, Nokia

Objectives of Communication September 2009 Objectives of Communication To establish a common language about WS spectrum use among dissimilar networks and devices Two-way communication is needed, examples: collaborative spectrum sensing two-way protocol on spectrum access contention Ari Ahtiainen, Nokia

Objectives of Spectrum Use Rules September 2009 Objectives of Spectrum Use Rules To achieve rules on WS spectrum access, to provide a fair spectrum use etiquette Such an etiquette builds on the discovery and communication described above Ari Ahtiainen, Nokia

September 2009 Summary Positioning of Coexistence specification w.r.t individual 802 radio specifications Clarification of networks and devices as actors in the coexistence scheme Some comments on the scoping of the Coexistence PAR Text improvement on the objectives of Network Discovery Ari Ahtiainen, Nokia