Doc.: IEEE 802.19-08/0021r2 Submission July 2008 Jing Zhu, Intel CorporationSlide 1 IEEE 802 Air-Interface Support for Co- Located Coexistence Notice:

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Presentation transcript:

doc.: IEEE /0021r2 Submission July 2008 Jing Zhu, Intel CorporationSlide 1 IEEE 802 Air-Interface Support for Co- Located Coexistence Notice: This document has been prepared to assist IEEE 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. Date: Authors:

doc.: IEEE /0021r2 Submission July 2008 Jing Zhu, Intel CorporationSlide 2 Abstract This presentation reviews the existing mechanisms in the latest IEEE / standard drafts, particularly “PSC-based co-located coexistence enhancement” in IEEE Rev2 and “Co-located Interference Reporting” in IEEE v, and includes material that have been previously submitted.

doc.: IEEE /0021r2 Submission July 2008 Jing Zhu, Intel CorporationSlide 3 Outline Motivation Rev2: PSC-based Co-located Coexistence v: co-located interference reporting Comparison

doc.: IEEE /0021r2 Submission July 2008 Jing Zhu, Intel CorporationSlide 4 Motivation: Multi-Radio User Terminal Problem: Interference between co-located radios –small separation, e.g. <20MHz between WiFi/BT and WiMAX Bluetooth, Wi-Fi: 2.4Ghz WiMAX: Ghz, Ghz –wideband interference, e.g. receiver blocking and OOB emission –little isolation, e.g. 10~30dB isolation on a small form-factor device –with no solution, co-located Tx or Rx of different technos is generally ok (as long as difference between Tx or Rx signals does not exceed 20dB), but co-located Tx of one techno prevents Rx of other technos Solution 1: RF domain (filtering, isolation, etc.) –costly, large in size, highly platform dependent –not effective to wideband interference with small separation Solution 2: Time domain (TDM / MAC coordination) –universal, effective, and media independent –enabled by packet switching and spectrum efficient PHY (MIMO-OFDM) –but need air-interface support Air-Interface Design Considerations: Data Rate Coverage QoS Security Power Mobility Multi-Radio Coexistence …

doc.: IEEE /0021r2 Submission July 2008 Jing Zhu, Intel CorporationSlide 5 Typical Co-Located Coexistence (CLC) Activities Bluetooth SCO/eSCO TxRx 2 625us 3.75ms 134 Wi-Fi Beacon Rx RxRx 102.4ms varied Wi-Fi Data Tx DataACK varied DataACK 56 Rx 102.4ms 15ms (3 frames) Problem Description: Co-located Coexistence (CLC) Activities are the Tx or/and Rx activities of one or multiple co-located radios that are not detectable over the air, but will impact the communications to / from another co-located radio.

doc.: IEEE /0021r2 Submission July 2008 Jing Zhu, Intel CorporationSlide Rev2: PSC-based Co-Located Coexistence (CLC) High level principles –Extends usage of power save class (PSC) to manage TDM between WiMAX and other technologies [PSC-based Mode 1, 2 + MAP Relevance] –Makes use of AMC permutation to increase spectrum separation PSC-based Mode 1  TDM-based CLC with Wi-Fi –BS shall honor the configurations for the PSC in the MS MOB_SLP-REQ message, and does not gratuitously reject or modify the configuration. –MAP Relevance: defines that the listen and sleep interval follow the MAP relevance. For example, the UL subframe of each listening and sleep interval is shifted to the next frame compared to the DL subframe of that interval according to the MAP relevance. PSC-based Mode 2  TDM-base CLC with Bluetooth eSCO –BS shall not provide any MS UL allocation in the first frame of the listening interval –BS should provide any DL allocation as much as possible in the first frame of listening interval –BS shall, to all extent possible, populate the DL subframe such that DL allocations for all MS with Co-located-Coexistence-Enabled active PSC and with allocations in the current DL subframe, precede in time the allocations for other MS that do not need co- located coexistence support and are allocated in the same DL subframe. UL Band AMC  Reduce Interferences to Other Radios –either lowermost or uppermost frequencies will be used for UL band AMC subchannel allocations to achieve the maximum spectrum separation between radio and the co- located radio in the adjacent bands.

doc.: IEEE /0021r2 Submission July 2008 Jing Zhu, Intel CorporationSlide 7 PSC-based Mode 1 (w/ MAP Relevance) UL MAP Relevance “MAP Relevance” provides balanced DL/UL throughput with shorter duty cycle, which benefits the QOS.

doc.: IEEE /0021r2 Submission July 2008 Jing Zhu, Intel CorporationSlide 8 PSC-based Mode 2

doc.: IEEE /0021r2 Submission July 2008 Jing Zhu, Intel CorporationSlide 9 Co-Located-Coexistence-Enabled TLV Bit #2 can set to 1 only if bit #0 is set to 1 and bit #1 is set to 0 Bit #4 shall be interpreted by the BS only if bit #3 is set to 1 Only one instance of this Co-located Coexistence-Enabled TLV should be added to MOB_SLP-REQ and MOB_SLP-RSP messages

doc.: IEEE /0021r2 Submission July 2008 Jing Zhu, Intel CorporationSlide 10 PSC Parameters and Sleeping / Absence Pattern ParametersLength (bits) Initial-sleep window8 Listening-window8 Final-sleep window base10 Final-sleep window exponent3 Initial- sleep window (A) Listening Window (B) Final-sleep window base (C) Final-sleep window exponent (D) Sleeping Window (frames) Listening Window (frames) Type Imin(Ax2 i-1, Cx2 D ) B Type IIAB Type IIICx2 D 0 Maximum Initial Listening Window = Maximum Initial Sleep Window = 255 frames (1.275 second)

doc.: IEEE /0021r2 Submission July 2008 Jing Zhu, Intel CorporationSlide 11 IEEE Other Relevant Activities IEEE m –Multi-Radio Coexistence block performs functions to support concurrent operations of IEEE m and non-IEEE m radios collocated on the same mobile station.  Call for contributions for system description document in September ‘08

doc.: IEEE /0021r2 Submission July 2008 Jing Zhu, Intel CorporationSlide 12 Simple protocol enables terminal to indicate it is using several radios simultaneously and performance of WLAN RX is degraded Report allows terminal to indicate interference time characteristics, level, and other information Automatic reporting is supported, i.e., whenever STA realize co- located interference is changed it can send Report to AP AP can use reported information several ways, 1) it can schedule DL transmissions not to collide with interference slots and 2) it can use information to adjust e.g., rate adaptation and retransmission logics v – Co-located Interference Reporting AP STA Co-located Interference Request Other radio operation is started causing performance degradation Co-located Interference Report Other radio operation is stopped Co-located Interference Report

doc.: IEEE /0021r2 Submission July 2008 Jing Zhu, Intel CorporationSlide v: Co-located Interference Report Information Element FieldsLength (bytes) Element ID1 Length1 Report Period1 Interference Level1 Interference Level Accuracy / Interference Index 1 Interference Interval4 Interference Burst Length4 Interference Start Time4 Interference Center Frequency2 Interference Bandwidth2

doc.: IEEE /0021r2 Submission July 2008 Jing Zhu, Intel CorporationSlide 14 Comparison Rev v PatternPeriodic, Static Maximum Duration1 second1 hour Granularity5ms1 microsecond Number of Activities116 Message Length12 bytes21 bytes CLC-Aware Transmission Behavior YesNo

doc.: IEEE /0021r2 Submission July 2008 Jing Zhu, Intel CorporationSlide 15 Further steps Complementarities of proposed options: typical behavior/setting of device integrating v Rev2 add-ons for CLC  Discussions Interaction with other functionalities: – power save modes (U/S-APSD in e + U/S-PSMP in n) –…?  Design use cases and scenarios Synchronize timetables for availabilities of different standards and related certification / IOT in forums (WMF, BT SIG, WFA) Other open issues

doc.: IEEE /0021r2 Submission July 2008 Jing Zhu, Intel CorporationSlide 16 References IEEE P802.16Rev2 D5.0 IEEE P802.11v-D2.01 IEEE /0508r1 IEEE m-08/003r3 IEEE 802 Plenary Tutorial on “WPAN/WLAN/WWAN Multi-Radio Coexistence”, Nov. 13, 2007