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Spectrum & 3G services AUSPI Presentation to TRAI 01.08.06.

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Presentation on theme: "Spectrum & 3G services AUSPI Presentation to TRAI 01.08.06."— Presentation transcript:

1 Spectrum & 3G services AUSPI Presentation to TRAI

2 1st August 2006AUSPI Proprietary2 UASL LICENSE & 3G PRIME ISSUES INTERFERENCE ISSUES SUGGESTIONS

3 1st August 2006AUSPI Proprietary3 UASL LICENSE & 3G

4 1st August 2006AUSPI Proprietary4 3G Policy ! UASL License permits provision of voice and data services and does not distinguish between 2G & 3G. Flexibility to provide any service permitted under the license. 3G is not a new service – no new policy required 3G in its simplistic form is nothing but enhanced data application along with multimedia - not a new service. Such services already exist (eg,: EDGE in GSM) Since TRAI considering the issue afresh- consider bringing level playing field between operators using different technologies; CDMA & GSM

5 1st August 2006AUSPI Proprietary5 3G Policy ! No reservation of spectrum for BSNL/MTNL Present technology neutrality only to the extent that DOT does not enforce any technology. Establish technology neutrality in real sense and allocate spectrum– let operators use any technology to provide any service permitted under the licence. TRAI/DOT should make efforts to get the spectrum in India used for telecom services universally.

6 1st August 2006AUSPI Proprietary6 PRIME ISSUES

7 1st August 2006AUSPI Proprietary7 Prime Issues What is 3G? Band Allocation –2100 MHz for both CDMA & GSM operators –Appropriateness of 2100 MHz for CDMA operators Is 2100 MHz the only band for 3G? –Many options to TRAI for consideration for 3G Services Mixed band allocations and interference issues

8 1st August 2006AUSPI Proprietary8 3G – What is it? According to ITU, some key requirements of 3G service include –Improved system capacity –Backward compatibility with 2G systems –Multi media support and –High speed packet data services meeting the following criteria 2 mbps in fixed or in building environments 384 kbps in pedestrian or urban environments 144 kbps in wide area mobile environments Variable data base in large geographic area systems (satellite) Present UASL licence permits all these features/ capabilities

9 1st August 2006AUSPI Proprietary9 3G – What is ITU saying? 3G is a term coined by global cellular community to indicate the next generation of mobile service capabilities (Higher capacity / Enhanced network Functionalities) that allow advanced services and applications, including multimedia – ITU

10 1st August 2006AUSPI Proprietary10 3G & ITU Some Key observations ITU Defines the capability of 3G and not the association of the same with any particular frequency band Ensuring economies of scale by use of global standards and meeting needs of mass market and international roaming As per ITU definitions and global best practices, 3G is a service that is agnostic to frequency band of use. CDMA2000 and WCDMA both qualify for 3G services and more importantly in any frequency band that they operate in. USA is an example for demonstration of operational 3G systems in non-2100MHz band In the US, 3G services including WCDMA operate in non-2100 MHz bands; they operate in 850/900/1900 MHz band!!!

11 1st August 2006AUSPI Proprietary11 Is 3G band specific? NO Equating 3G or for that matter WCDMA with 2100 is not appropriate As defined by ITU and already practiced by some of the countries, 3G is completely band-agnostic In the US 3G services including WCDMA operate in 850/1900 MHz band. Similarly, incumbent GSM operators in the world in 900 & 1800MHz are working out deployment options in 900 & 1800MHz! (Telstra is an example) Yet another example of WCDMA becoming applicable in 1800MHz is proven by already available commercial equipment availability – Huawei’s announced equipment availability in 1800MHz! AUSPI would urge TRAI to take cognizance of these developments while arriving at spectrum decisions for WCDMA/3G allocations and NOT limit itself to analysis of 2100MHz

12 1st August 2006AUSPI Proprietary12 Band Allocation…Inappropriateness of 2100 MHz for CDMA Key criteria needed in selecting frequency band for any cellular operation Network equipment availability Handset availability [Consider dual band with existing freq (800MHz)] Global Roaming support Economies of scale Time to market Choice of vendors and wide range in models The answer is NO Does 2100 MHz for CDMA meet any of these criteria?

13 1st August 2006AUSPI Proprietary13 Band Allocation…Inappropriateness of 2100MHz for CDMA No vendor is making compatible equipment in 800 and 2100 MHz bands. Dual band handsets in 800 and 2100 MHz combination neither AVAILABLE nor do they figure in the manufacturing program of vendors. All International CDMA networks are in 800 and 1900 MHz. Global roaming support will be possible in these bands only. 2100MHz for CDMA fails on the account of lack of global economies of scale, choice in vendor selection. Allocation of 2100MHz for CDMA will put the operators at a disadvantage compared to GSM operators in terms of appropriate time to market and parity with competition.

14 1st August 2006AUSPI Proprietary14 Mixed band Mixed band allocation between IMT bands B3 & B1 As per ITU Recommendation M –IMT-2000 systems can be deployed in any band- multiple bands have been identified for IMT-2000 systems –Permit flexibility to administrations to deploy IMT-2000 systems even in bands other than those identified in the RR. Solution for India –Mixed band is the only practical solution in India which ensures growth and evolution of both CDMA and GSM

15 1st August 2006AUSPI Proprietary15 Issues in Mixed band Does it lead to interference-Yes Is there a solution-Yes Is the solution technically feasible? -Yes Is it economically viable?-Yes So what is the analysis and recommendations?

16 1st August 2006AUSPI Proprietary16 INTERFERENCE ISSUES

17 1st August 2006AUSPI Proprietary17 Outline  Background and Requirement  Study on how to mitigate the effect of C2K Base Station Transmit on WCDMA Node-B Receive  Study on how to mitigate the effect of WCDMA Handset (UE) Transmit on C2K Handset Receive  Field Trial in India to demonstrate co-existence of WCDMA and CDMA in 1900MHz band

18 1st August 2006AUSPI Proprietary18 ITU defined Band allocations near 2 GHz ITU band 1, commonly termed the “UMTS” band –UL: / DL: MHz ITU band 3, commonly termed the “PCS” band –UL: / DL: MHz MHz IMT MHz Band US PCS 1900 MHz Band MHz Mobile TX Base station TX Mobile TX Spectrum Overlapping Zone Base station TX

19 1st August 2006AUSPI Proprietary19 Possible Spectrum Allocation Plan around 2 GHz (Mixed Band Plan) ITU band 1, commonly termed the “UMTS” band –UL: / DL: MHz (60+60 MHz) ITU band 3, commonly termed the “PCS” band –UL: / DL: MHz (10+10 MHz) MHz IMT MHz Band US PCS 1900 MHz Band MHz Mobile TX Base Station TX Mobile TX 1980 MHz Boundary

20 1st August 2006AUSPI Proprietary20 Interference Issues in Mixed Band Plan (at 1980 MHz Boundary) Major interference issues are: –PCS band (C2K) Base Station Transmit affecting UMTS band (WCDMA) Base Station (Node B) Receive –UMTS band (WCDMA) Mobile (UE) Transmit affecting the PCS band (C2K) Mobile (MS) Receive

21 1st August 2006AUSPI Proprietary21 Case 1: Study on how to mitigate the effect of C2K Base Station Transmit on WCDMA Node-B Receive Definition: 1. Isolation is the loss between the antenna sockets of the aggressor Tx and the victim Rx 2. C-C spacing is different from GB, but is related in the following way: C-C spacing = (A/2+B/2)+GB where A and B are assigned channel bandwidths of adjacent carriers 3. Channel bandwidth is higher than occupied bandwidth based on the slope of the stop band skirt 4. Guard band is therefore the edge to edge frequency separation

22 1st August 2006AUSPI Proprietary22 CDMA BTS to UMTS BTS Interference Analysis Model

23 1st August 2006AUSPI Proprietary23 CDMA BTS to UMTS BTS Interference Analysis Principle Principle I: The received out-of-band emissions at WCDMA Node B from the CDMA BTS transmitter should be 10dB below the WCDMA Node B receiver noise floor. Principle II: Carrier TX power of CDMA BTS should satisfy WCDMA ACS (Adjacent Channel Selectivity) requirements. 3rd order IMP is not a major interference source, specially under enough C-C spacing separation.

24 1st August 2006AUSPI Proprietary24 C2K BTS Tx Power Amplifier Out put in PCS band PA out RF spectrum chart of a C2K MHz Duplexer Filter would provide further reduction to this OOBE Spurious emissions When PA output power is 45.4dBm[=29.40dBm+10×log10 (1.250MHz/30kHz)], Mark1—central of 1X carrier Mark2—offset of 3.125MHz Mark3– offset of MHz Mark4-- offset of 5.625MHz Spurious emission is dBm/30kHz, (Mark2) dBm/30kHz, (Mark3) dBm/30kHz (Mark4) individually.

25 1st August 2006AUSPI Proprietary25 C2K BTS Tx Duplexer Out put in PCS band Characteristics of a Duplexer/Filter in C2K BTS for 1980 to 1990 MHz range For edge to edge Guard Band of 2.5MHz [= (Marker 3) (Marker 5)], = ( ) =31.082dB attenuation can be achieved by build-in filter in RFE Duplexer. And with additional filter extra attenuation of 30dB Is possible.

26 1st August 2006AUSPI Proprietary26 Out-of-band emission limits in 3gpp2/ITU Spec for 1.9GHz CDMA Transmitter Table Band Class 1, 4, 6, and 8 Transmitter Spurious Emission Limits of C.S0010-C_v1.0

27 1st August 2006AUSPI Proprietary27 Isolation requirement for Out-Of-Band (OOB) Emissions UMTS band of 3.84 MHz Noise Floor = K*T*B+NoiseFigure =10× log 10 (1.38× ×290×3.84×10 6 )+4 = dBW = dBm(/3.84MHz) Acceptable interference is at least 10 dB below receiver noise floor in the band of concern (3.84 MHz) – – 10 = dBm/3.84 MHz As per the Out-of-band emission (OOBE) limit by 3GPP2 for PCS, CDMA BTS transmit OOBE should not exceed - 13 dBm/MHz( dBm /30KHz) beyond MHz frequency offset from block edge –For the UMTS band of concern it is log (3.84) = -7.2 dBm/3.84 MHz Hence, the worst case calculation for the OOBE isolation requirement from ITU B3 CDMA to ITU B1 WCDMA should be – ( ) = 107 dB (Worst Case) –This isolation requirement = CDMA BTS Duplexer filter + Additional TX filter + Antenna space isolation

28 1st August 2006AUSPI Proprietary28 WCDMA Node B Adjacent Channel Selectivity requirement Wanted signal mean power >-115dBm Interfering signal mean power < -52dBm

29 1st August 2006AUSPI Proprietary29 Isolation requirement for WCDMA Node B Rx Blocking WCDMA Node-B Receiver can tolerate the adjacent channel (out-of- band) signal level of around - 52 dBm and below. The maximum level of the CDMA BTS transmit signal in WCDMA adjacent channel is 47.8 dBm (combined signal of 3 20W CDMA carriers) –43dBm[20Watt]+10lg(3)=47.8dBm Hence, the worst case calculation for isolation requirement for receiver blocking will be – (- 52) = 99.8 dB = ~ 100dB –From this result, it is observed that the Isolation requirement for Receiver blocking (100 dB) is less than the isolation requirement for the Out-of-band emissions (107 dB) –Therefore, if we obtain the required isolation for OOBE that would be sufficient against receiver blocking for interfering signals at +/- 5 MHz and beyond

30 1st August 2006AUSPI Proprietary30 Techniques to achieve the required Isolation Techniques to achieve the required Isolation in order to combat the Interference effects (both OOBE and Blocking) –Separation between WCDMA and C2K carriers –Extra Bandpass filtering in the C2K Base Station transmit path –Extra Bandpass filtering in the WCDMA Node-B receive path –Antenna Isolation (between WCDMA and C2K base station antennas) through physical separation and proper antenna orientation C-C spacing Separation Guard BandC2K Base Station transmit filtering WCDMA Node-B receive filtering Big (>6.35MHz)3.8 MHzLow CostLow cost Small (3.85MHz)1.3 MHzHigh cost

31 1st August 2006AUSPI Proprietary31 Examples of C-C spacing between the Last WCDMA and the first C2K carrier 1980 MHz boundary 2.6 MHz2. 4 MHz 5 MHz Last WCDMA Carrier First C2K Carrier MHz MHz a)With 3.85 MHz C-C Separation GB= =1.3MHz b) With 5 MHz C-C separation GB= =2.45MHz 1980 MHz boundary 2.6 MHz1.25 MHz 3.85 MHz Last WCDMA Carrier First C2K Carrier MHz MHz

32 1st August 2006AUSPI Proprietary32 How much C-C Sep/Guard Band is really required? Required C-C separation can be decreased based on bandpass filtering –With minimum C-C separation of 3.85 MHz, there is some inherent guard band(1.3MHz) available between the last WCDMA and the first C2K carrier –Cost of C2K special BTS TX filters would depend on the roll-off characteristics –Steeper roll-off requirement would increase cost of the special filters –Reasonable cost bandpass filters are available in the market that would provide 60 dB attenuation (from pass band to stop band) within 1.3 MHz from the edge of the pass band (See next slide for characteristics of such filter) As per the Out-of-band emission (OOBE) limit stipulated by 3GPP2 for the PCS band operations, C2K BTS transmit OOBE would be less than - 13 dBm/MHz beyond 1 MHz of frequency offset Any extra guard band beyond 1 MHz would ease design cost on the special filters in C2K BTS Tx path for OOBE interference reduction

33 1st August 2006AUSPI Proprietary33 Suitable C2K BTS Tx Bandpass Filter Characteristics (with passband from 1980 to 1990 MHz) ~1.3 Mhz

34 1st August 2006AUSPI Proprietary34 C-C spacing Recommendations Alternative 1: With additional C2K BTS Tx Filter (that would provide 60 dB stop band attenuation) as well as WCDMA Node-B receive Filter (with 40+ dB stop band rejection): –Recommended C-C spacing is 3.85 MHz(GB=1.3MHz) –Here, we get 7 C2K carriers in full MHz of PCS band Alternative 2: With only C2K BTS Tx Filter and no WCDMA Node-B Rx Filter –Recommended C-C spacing is 5 MHz (GB=2.45MHz) One way to get is by shifting C2K carriers away from 1980 MHz boundary –In this case, we get only 6 C2K carriers in PCS band Alternative 3: With no additional filters in both C2K BTS transmit and WCDMA Node-B receive paths –Recommended C-C spacing is 6.35 MHz (GB=3.8MHz)(with duplexer in C2K BTS Tx) –Any more separation beyond 6.35 MHz is not going to be effective –With this allocation plan, we get only 5 C2K carriers in PCS band

35 1st August 2006AUSPI Proprietary35 C-C spacing Recommendations Figures Alternative 1: Additional filter attenuation in CDMA TX and WCDMA RX Alternative 2: Additional filter attenuation only in CDMA TX path Alternative 3: No additional filters in CDMA and WCDMA BTS WCDMA spectrum will not be effected by present of CDMA; In case of co-existence of WCDMA and CDMA operation in 1900MHz band, additional filtering attenuation of 40dB will be needed in the WCDMA RX path.

36 1st August 2006AUSPI Proprietary36 Antenna deployment strategy between C2K BTS and WCDMA Node B Alternative1: With filters on both C2K and WCDMA BTSs –If sharing the same antenna tower and site Vertical separation of > 1 m would give 50 dB of suppression –Different antennas on the same site (Near Field) Horizontal separation of >12 m would give 50 dBm of suppression (Gtx+Grx=10dB ) H-V separation based on the formula shown in the next slide Alternative 2: With C2K Tx filter but no WCDMA Rx filter –It is the same as the first case Alternative 3: With no filters in both C2K and WCDMA BTSs –Around 800 m to 1 km of site separation (is not practical) Possibility of certification from all the major Infrastructure vendors that they can include this filtering in the C2K base stations is required

37 1st August 2006AUSPI Proprietary37 Formulae to calculate the Antenna Isolation availability

38 1st August 2006AUSPI Proprietary38 Isolation Example Gtx+Grx=30dB is nearly face to face installation. Horizontal Isolation Vertical Isolation meter

39 1st August 2006AUSPI Proprietary39 Free Space path loss model for the PCS band

40 1st August 2006AUSPI Proprietary40 C2K BTS to WCDMA Node-B Interference: Summary Up to 107 dB of isolation is required to mitigate interference due to CDMA BTS TX affecting WCDMA Node-B RX, for both OOB emission and blocking In normal practice, around ~50 dB of antenna isolation is quite easy to get with good installation practices, for both co-located and non co-located cases With filters in both C2K and WCDMA BTSs, a min C-C frequency of 3.85 MHz (GB=1.3MHz) is required to take care of the interference issues –Band pass filter with 60 dB out-of-band rejection/attenuation in CDMA BTS transmit path is realizable with 3.85 MHz of C-C separation –Cost of band pass filters would go down with 5 MHz of C-C separation With filters in only C2K BTS Tx path, a min C-C separation of 5 MHz (GB=2.45MHz) is required to take of the effect of IM products With no filters in both C2K and WCDMA BTSs, a min C-C separation of 6.35 MHz (GB=3.8MHz) and a site to site separation of around 800 meters is required

41 1st August 2006AUSPI Proprietary41 Comparison Table for the 3 Alternatives Working C-C Separatio n >/= Guard Band Antenna separation requirement Alternative 1: Filters in both BTSs 3.85 MHz1.3MHzPractical antenna separation: for 50dB isolation >1m Vertical sep or >12m Horizontal sep for same site Alternative 2: Filter in C2K BTS only 5 MHz2.45MHzPractical antenna separation: for 50dB isolation >1m Vertical sep or >12m Horizontal sep for same site Alternative 3: No filters in both BTSs 6.35 MHz3.8MHzUnrealistic antenna / site separation

42 1st August 2006AUSPI Proprietary42 Case 2: Study on how to mitigate the effect of WCDMA Handset (UE) Transmit on C2K Handset Receive

43 1st August 2006AUSPI Proprietary43 Some important observations with mobile behavior Handset distribution and usage is highly stochastic in nature –WCDMA UE and C2K MS both must be active for interference to occur –If WCDMA UE spurious emissions are better than standards specified values, then the interference effect would also be less In general, the maximum Tx power of a class 3 WCDMA UE is around 10 dBm (which is 11 dB below its assigned peak power of 21 dBm) Finally, it leads to the conclusion that UE to MS interference is expected to occur in a relatively small percentage of the time

44 1st August 2006AUSPI Proprietary44 WCDMA UE Emission Mask Minimum Spectrum mask Emission Requirement: –For frequency offset from 2.5 MHz to 3.5 MHz, - 20 – 15(Δf – 2.5) dBc / 1 MHz –For frequency offset from 3.5 MHz to 7.5 MHz, - 35 – 1(Δf – 3.5) dBc / 1 MHz –For frequency offset from 7.5 MHz to 8.5 MHz, - 39 – 10(Δf – 7.5) dBc / 1 MHz –For frequency offset from 8.5 MHz to 12.5 MHz, - 49 dBc / 1 MHz Frequency Offset in MHz Relative Carrier Level in dBc MHz offset, dBc/1 MHz 5MHz offset, dBc/1 MHz

45 1st August 2006AUSPI Proprietary45 Isolation requirement for C2K Mobile RF Blocking As per the OOBE specifications, at 3.85 MHz away from center frequency, WCDMA OOBE would be dBc/1 MHz –At 5 MHz frequency offset, WCDMA OOBE would be – 36.5 dBc/1 MHz The peak power of WCDMA UE is 21 dBm (for a class MHz, i.e., 15 dBm/1 MHz From the emission specifications we can derive: –At 3.85 MHz frequency offset, WCDMA OOBE is (-15) = dBm/1 MHz –At 5 MHz frequency offset, WCDMA OOBE is (-15) = dBm/1 MHz C2K Handset Adjacent Channel Selectivity (ACS) is - 68 dBm/ 1 MHz –Amount of isolation required to take care of the de-sensitization of C2K Mobile from the WCDMA UE TX signal is (- 68) = 47.6 dB As per the 2 slope path loss model, we can get this 47.6 dB of path loss within less than 1 meter distance from the mobile transmitter antenna –Hence, from RF blocking point of view, there is no interference problem from WCDMA UE transmit signal to C2K MS receive

46 1st August 2006AUSPI Proprietary46 Isolation requirement for C2K Mobile Out-of-band Emissions From the emission specifications, at 3.85 MHz frequency offset, WCDMA OOBE comes to dBm/1 MHz C2K Handset receive filter rejection specification for 3.85 MHz offset from its desired signal would be around 37 dB –WCDMA OOBE signal received by C2K 3.85 MHz offset is ( ) = dBm/1 MHz 5 MHz offset it is dBm/1 MHz Acceptable interference at C2K mobile is dBm/1 MHz (10 dB below receiver noise floor of -106 dBm /1 MHz) –Amount of isolation required to take care of the OOBE for C2K Mobile from the WCDMA UE TX signal is (-116) = 58.6 dB –Amount of isolation required to take care of the OOBE for C2K Mobile with 5 MHz frequency offset is (- 116) = 57.5 dB As per the 2 slope path loss model, we can get this 58.6 dB of path loss with ~10 m from the mobile transmitter antenna –Hence, from OOBE point of view also, there is no interference problem from WCDMA UE transmit signal to C2K MS receive if 10 m separation is maintained

47 1st August 2006AUSPI Proprietary47 WCDMA Handset Tx affecting CDMA Handset Rx: Summary From the RF blocking of the C2K MS receive by the WCDMA UE transmit signal point of view –with 3.85 or 5 MHz C-C frequency spacing of carriers, around 1 m mobile separation is required From OOBE interference on the C2K MS receive by the WCDMA UE transmit signal point of view –with 3.85 or 5 MHz C-C frequency spacing of carriers, 10 m separation is required –Under 3.85 C-C frequency spacing, with <10 m, there will be C2K Forward Link capacity degradation Hence, with < 10 m mobile separation and 5 MHz C-C frequency spacing of carriers, there will be very negligible C2K DL capacity degradation

48 1st August 2006AUSPI Proprietary48 Field Trial in India to demonstrate co-existence of WCDMA and CDMA CDMA frequency for testing : UL: MHz / DL: MHz (10+10 MHz) WCDMA frequency for testing: UL: MHz / DL: MHz (60+60 MHz) Guard Band between CDMA and WCDMA(edge to edge): 2.5MHz,3.75MHz,5MHz(Based on test cases) Distance between WCDMA and CDMA 2000 sites is 200m / 500m /1km based on test cases Filtering attenuation in CDMA Tx and WCDMA Rx paths CDMA Tx path: 60dB WCDMA Rx path: 40dB Antenna space isolation between CDMA and WCDMA BTSs: 50-60dB

49 1st August 2006AUSPI Proprietary49 Deliverable after Field Trial Test Result Policy framework for deployment of 3G services using WCDMA/CDMA technology in 1900MHz band. Mitigation of capacity loss / Quality degradation of WCDMA/CDMA network due to cross technology interference.  Guard band requirement between CDMA and WCDMA for co- existence 1900MHz band.  Additional filter attenuation requirement in CDMA TX path and WCDMA RX path for co-existence.  Antenna isolation requirement between CDMA and WCDMA BTS.

50 1st August 2006AUSPI Proprietary50 Conclusion  WCDMA( MHz for Node B reception) and CDMA(UL: MHz/DL: MHz) CAN co-exist in India under the following easy-to-achieve conditions:  An edge-to-edge Guard Band of min 1.3MHz using suitable filter in the CDMA Tx path and WCDMA Rx path.  60dB antenna isolation between CDMA and WCDMA BTS.  10 meters separation between WCDMA and CDMA mobile or 10% DL CDMA capacity degradation with 3.85MHz(GB=1.3 MHz) C-C separation.

51 1st August 2006AUSPI Proprietary51 SUGGESTIONS

52 1st August 2006AUSPI Proprietary52 (1)Allocate additional 800 MHz (5 MHz from ) (2)Allocate 1900 MHz for existing expansion as well as 3G services (3)Allocate appropriate spectrum and Allow flexibility to operators to provide any service suitable to their requirements and as per the licence

53 1st August 2006AUSPI Proprietary53 (1)Additional spectrum in 800 MHz

54 1st August 2006AUSPI Proprietary54 Increase it from 20+20mhz to 25+25mhz Reconsider allocation to BSNL /MTNL Two ways to increase spectrum in 800MHz How to get Additional Spectrum in 800 MHz Band

55 1st August 2006AUSPI Proprietary55 Present Allocation in 800 MHz InternationalIndia MHz / MHz (25+25 MHz) MHz / MHz (20+20 MHz )

56 1st August 2006AUSPI Proprietary56 Increase 800 MHz bandwidth from MHz to MHz– How to achieve? In India: (5MHz)not allocated- wasted Why : corresponding downlink portion ( MHz) is earmarked for GSM. Path forward: shift GSM from this portion to DCS 1800 MHz band

57 1st August 2006AUSPI Proprietary57 Issues in shifting GSM to DCS 1800 MHz band Arguments For : CDMA operators have no other option- GSM operators have the option to go to 1800MHz band Known and established Compatibility between 900 and 1800 MHz More than enough spectrum is available in 1800MHz band Even presently this portion of 900 MHz band ( ) is not available to GSM operators at many places TRAI recommended this portion to be vacated from existing users and be allocated to the 4th cellular operators who have frequency in 1800 MHz band only which is against the license conditions of 4 th Cellular operators [TRAI Reco of 13 th May 2005 on Spectrum Related Issues para at pages 69 & 70] Arguments Against : No argument

58 1st August 2006AUSPI Proprietary58 Reconsider allocation to BSNL/MTNL No reservation for BSNL/MTNL for the future. In GSM no. of subscribers of MTNL as on is 2.17 Million and for CDMA about 1.5 lakh (Delhi + Mumbai). They have 4 CDMA carriers (5+5Mhz) in Delhi and Mumbai for less than 2 lakhs subscribers! Similarly in case of BSNL the GSM subscribers are 18.3 Million (all India) and for CDMA the number is about 2.6 Million (all India) Both BSNL&MTNL are concentrating on GSM and blocking spectrum for CDMA Both are not even entitled for 4 CDMA carriers since they are also using cor- DECT and according to the licence conditions those using cor-DECT are entitled for only 3 carriers in CDMA band.

59 1st August 2006AUSPI Proprietary59 (2) –Allocate 1900 MHz for expansion of existing network as well as for 3G services –Consider the utilisation of cor-DECT frequencies in India - occupies crucial portion of 1900 MHz PCS band { MHz} –In metro and large urban areas wherever cor- DECT is not used. –This spectrum is wasted –Reconsideration required.

60 1st August 2006AUSPI Proprietary60 Suggested Spectrum Allocation 1900 MHz Band CDMA PCS / MHz Band CDMA / *Wherever Cor-DECT frequency is not allocated

61 1st August 2006AUSPI Proprietary61 (3) –Allocate appropriate spectrum and allow flexibility to operators top provide any service suitable to their requirements –Licence is : Technology neutral Permits voice and data services Permts all services which dio not require a separate licence. –Within the allocated spectrum allow operators to use all evolving technologies.

62 1st August 2006AUSPI Proprietary MHz, MHz, MHz and for Wi-MAX applications. Not to consider 700 MHz for Wi-MAX application. Minimum assignment of 21 MHz contiguous band. Make available sufficient spectrum for Wi-MAX & priority allocation be given to existing UASLs on circle basis. Pricing mechanism for Wi-MAX should be: –Levy of revenue share as is done for access providers. –Amount should be <1% to cover the administrative cost. Spectrum for Wi-MAX

63 1st August 2006AUSPI Proprietary63 Thank you! Contact us at:


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