1. doc.: IEEE 802. 15-08-xxxx-xx-xxxx Submission S.M.Ryu(Casuh), H.S.Lee(ETRI), & D.Y.Kim (Chungnam Univ.) Slide 1 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Single Baseband Structure to support Multi RF] Date Submitted: [9 Sep. 2008] Source: [H.S.Lee, D. Y. Kim, C. S. Eun, S. M. Ryu] Company [ETRI, Chungnam Univ., Casuh] Address [220 Yuseong-gu, Gung-dong, Daejeon, Korea] Voice: [+82-31-709-5577, +82-42-821-6862], FAX: [+82-31-709-5578, +82-42-823-5586] E-Mail:[hsulee@etri.re.kr, dykim@cnu.kr, retaw@casuh.com] Re: [Contribution to IEEE 802.15.6 Meeting, Sep. 2008] Abstract:[We want to enhance QoS. and transmit high speed with low cost structure. If we could support multi narrow band RF with single baseband chip without any interference among multi RF’s ; QoS & High Speed are not any more troublesome in WBAN.] Purpose:[Proposal] Notice:This document has been prepared to assist the IEEE P802.15. 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. Release:The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15.

2. doc.: IEEE 802. 15-08-xxxx-xx-xxxx Submission S.M.Ryu(Casuh), H.S.Lee(ETRI), & D.Y.Kim (Chungnam Univ.) Sep. 2008 S. M. Ryu CASUH H. S. Lee ETRI D. Y. Kim and C. S. Eun Chungnam Univ. Single Baseband Structure to support Multi RF We want to enhance QoS and transmit high speed with low cost structure. If we could support multi narrow band RF with single baseband chip without any interference among multi RF’s ; QoS & High Speed are not any more troublesome in WBAN.

3. doc.: IEEE 802. 15-08-xxxx-xx-xxxx Submission S.M.Ryu(Casuh), H.S.Lee(ETRI), & D.Y.Kim (Chungnam Univ.) Slide 3 Diversity Test Conditions  Diversity Type  Mode 1 : Frequency & Time Hybrid Diversity  Mode 2 : Time Diversity with fixed frequency f 1  Mode 3 : Time Diversity with fixed frequency f 4  Test Method  Diversity Number : 1 to 5  Test Trial Frame Number : 20,000  Test Path  Case A : ~30m ; 1 soft board wall  Case B : ~30m : opposite direction to Case A  Case C : ~30m : 2 soft board wall  Decision Rule  Count number of Frame Error (CRC check)  Count number of Sync Loss (128 bit frame)  If we received one perfect frame among multi frames, we did not count

4. doc.: IEEE 802. 15-08-xxxx-xx-xxxx Submission S.M.Ryu(Casuh), H.S.Lee(ETRI), & D.Y.Kim (Chungnam Univ.) Slide 4 Diversity Test Structure d 1, f 1 d 1, f 2 d 1, f 3 d 1, f 4 d 1, f 5 d 2, f 1 Mode 1: Time & Frequency hybrid Diversity d 1, f 1 d 2, f 1 Mode 2: Time Diversity with fixed frequency f 1 d 1, f 4 d 2, f 4 Mode 3: Time Diversity with fixed frequency f 4 Diversity number : 1,2,3,4,5 times

5. doc.: IEEE 802. 15-08-xxxx-xx-xxxx Submission S.M.Ryu(Casuh), H.S.Lee(ETRI), & D.Y.Kim (Chungnam Univ.) Slide 5 Test Path Diversity Mode Diversity Number 12345 Case A Mode 1 5390 / 6461563 / 29667 / 3282 / 0210 / 0 Mode 2 3123 / 6022293 / 3162022 / 2531874 / 2301758 / 214 Mode 3 4506 / 10963258 / 9022868 / 8482666 / 8252541 / 811 Case B Mode 12700 / 329106 / 29 / 01 / 00 / 0 Mode 2 3601 / 6012487 / 3032136 / 2541945 / 2371816 / 229 Mode 3 2361 / 4221706 / 1851457 / 1351310 / 1251215 / 111 Case C Mode 1 8264 / 12723545 / 1011536 / 8637 / 0480 / 0 Mode 2 4648 / 7243416 / 4242976 / 3632750 / 3322580 / 309 Mode 3 5640 / 9614287 / 6143749 / 5143461 / 4603280 / 418 Frame Error Rate & Sync Loss Table # of frame error / # of Sync loss

6. doc.: IEEE 802. 15-08-xxxx-xx-xxxx Submission S.M.Ryu(Casuh), H.S.Lee(ETRI), & D.Y.Kim (Chungnam Univ.) Slide 6 RF #1 4M Mux/ Demux 750Kbps 32MHz Frame Format 1M Example : 1Mbps Time & Frequency Diversity d 1, f 1 d 1, f 2 d 1, f 3 d 1, f 4 d 2, f 1 d 2, f 2 d 2, f 3 d 2, f 4

7. doc.: IEEE 802. 15-08-xxxx-xx-xxxx Submission S.M.Ryu(Casuh), H.S.Lee(ETRI), & D.Y.Kim (Chungnam Univ.) Slide 7 Example : 1Mbps Frequency Diversity RF #1 f 1 RF #2 f 2 RF #3 f 3 RF #4 f 4 RF combiner 1M Mux/ Demux 750Kbps 32MHz Frame Format 1M Frame Must be synchronized among RF’s

8. doc.: IEEE 802. 15-08-xxxx-xx-xxxx Submission S.M.Ryu(Casuh), H.S.Lee(ETRI), & D.Y.Kim (Chungnam Univ.) Slide 8 Single Baseband for Multi RF Concept RF #1 f 1 RF #2 f 2 RF #3 f 3 RF #4 f 4 RF combiner 4M Mux/ Demux 12Mbps 32MHz Frame Format 16M Frequency Diversity High speed Tx with narrow band RF

9. doc.: IEEE 802. 15-08-xxxx-xx-xxxx Submission S.M.Ryu(Casuh), H.S.Lee(ETRI), & D.Y.Kim (Chungnam Univ.) Slide 9 Frame Structure example for scalable data rate LockPreambleTagAAPayloadEOF 1Mbps 250K ~ 4Mbps 250 μsec 128 μsec 64 μ 1500 μsec 50 μ 2msec 8μ8μ Overhead : Payload = 1 : 3 Payload Data Speed = 750Kbps ; 1MHz clock 750K / 1M 1.5M / 2M 3M / 4M 6M / 8M 12M / 16M Reference data rateScalable data rate

10. doc.: IEEE 802. 15-08-xxxx-xx-xxxx Submission S.M.Ryu(Casuh), H.S.Lee(ETRI), & D.Y.Kim (Chungnam Univ.) Slide 10 Conclusion  Multi Preamble Concept is suitable for WBAN  Reduce transmission time & Power consumption  Enhance QoS by perfect frame synchronization by hybrid diversity  Special Preamble is possible ; emergency, cell planning, multi RF etc  Demerits of multi preamble is negligible  128bit correlator H/W is not burden now  Longer Preamble length is not time loss  Multi Preamble could support new service in WBAN application  Supply tool to make single MAC to support scalable data rate  Support special purpose service like emergence broadcasting  Increase mobile channel capacity by Pico-cell Hand-over Planning  Diversity, Selective Hopping, Service converging, etc  Multi RF Structure is useful for low cost WBAN implementation  Synchronous frame concept can reject mutual interference among RF’s  Narrow band RF is easy to design, low power consumtion and low cost.