Spectrum

1
Spectrum 3G services

• AUSPI Presentation to TRAI
• 01.08.06

2
UASL LICENSE 3G
PRIME ISSUES
INTERFERENCE ISSUES
SUGGESTIONS
3
UASL LICENSE 3G
4
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
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
PRIME ISSUES
7
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
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
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
3G ITUSome 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
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 Huaweis
  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
Band AllocationInappropriateness 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

Does 2100 MHz for CDMA meet any of these criteria?
The answer is NO
13
Band AllocationInappropriateness 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
Mixed band

• Mixed band allocation between IMT bands B3 B1
• As per ITU Recommendation M.1036-2
• 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
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
INTERFERENCE ISSUES
17
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
ITU defined Band allocations near 2 GHz

• ITU band 1, commonly termed the UMTS band
• UL1920- 1980/ DL2110 -2170 MHz
• ITU band 3, commonly termed the PCS band
• UL1850-1910/ DL1930 - 1990 MHz

19
Possible Spectrum Allocation Plan around 2
GHz(Mixed Band Plan)

• ITU band 1, commonly termed the UMTS band
• UL1920- 1980/ DL2110 -2170 MHz (6060 MHz)
• ITU band 3, commonly termed the PCS band
• UL1900-1910/ DL1980 - 1990 MHz (1010 MHz)

20
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

• 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/2B/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
CDMA BTS to UMTS BTS Interference Analysis Model
23
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
C2K BTS Tx Power Amplifier Out put in PCS band
PA out RF spectrum chart of a C2K Carrier _at_
1981.25 MHz
When PA output power is 45.4dBm29.40dBm10log10
(1.250MHz/30kHz), Mark1central of 1X
carrier Mark2offset of 3.125MHz Mark3 offset
of 4. 375MHz Mark4-- offset of
5.625MHz Spurious emission is -31.85dBm/30kHz,
(Mark2) -38.42dBm/30kHz, (Mark3)
-43.15dBm/30kHz (Mark4) individually.
Duplexer Filter would provide further reduction
to this OOBE Spurious emissions
25
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
1983.12(Marker 3)-1980.625(Marker 5),
-1.7010-(-32.783) 31.082dB attenuation can be
achieved by build-in filter in RFE Duplexer. And
with additional filter extra attenuation of 30dB
Is possible.
26
Out-of-band emission limits in 3gpp2/ITU Spec
for 1.9GHz CDMA Transmitter
Table 4.4.1.3-2. Band Class 1, 4, 6, and 8
Transmitter Spurious Emission Limits of
C.S0010-C_v1.0
27
Isolation requirement for Out-Of-Band (OOB)
Emissions

• UMTS band of 3.84 MHz Noise Floor
  KTBNoiseFigure
• 10 log10(1.3810-232903.84
  106)4
• -134.2dBW
• -104.2dBm(/3.84MHz)
• Acceptable interference is at least 10 dB below
  receiver noise floor in the band of concern (3.84
  MHz)
• - 104.2 10 - 114.2 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(-28.23 dBm /30KHz) beyond
  1.625 MHz frequency offset from block edge
• For the UMTS band of concern it is - 13 10 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
• - 7.2 - (- 114.2) 107 dB (Worst Case)
• This isolation requirement
• CDMA BTS Duplexer filter Additional TX filter
  Antenna space isolation

28
WCDMA Node B Adjacent Channel Selectivity
requirement
Wanted signal mean power gt-115dBm
Interfering signal mean power lt -52dBm
29
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)
• 43dBm20Watt10lg(3)47.8dBm
• Hence, the worst case calculation for isolation
  requirement for receiver blocking will be
• 47.8 - (- 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
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 Band C2K Base Station transmit filtering WCDMA Node-B receive filtering
Big (gt6.35MHz) 3.8 MHz Low Cost Low cost
Small (3.85MHz) 1.3 MHz High cost High cost
31
Examples of C-C spacing between the Last WCDMA
and the first C2K carrier

• With 3.85 MHz C-C Separation
• GB3.85-0.625-1.9251.3MHz

b) With 5 MHz C-C separation GB5-0.625-1.9252.4
5MHz
2.6 MHz
2. 4 MHz
First C2K Carrier
Last WCDMA Carrier
5 MHz
1982.4 MHz
1977.4 MHz
1980 MHz boundary
32
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
Suitable C2K BTS Tx Bandpass Filter
Characteristics (with passband from 1980 to 1990
MHz)
34
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(GB1.3MHz)
• Here, we get 7 C2K carriers in full 1010 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 (GB2.45MHz)
• 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
  (GB3.8MHz)(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
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
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 gt 1 m would give 50 dB of
  suppression
• Different antennas on the same site (Near Field)
• Horizontal separation of gt12 m would give 50 dBm
  of suppression (GtxGrx10dB )
• 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
Formulae to calculate the Antenna Isolation
availability
38
Isolation Example
Horizontal Isolation
Vertical Isolation
meter
GtxGrx30dB is nearly face to face installation.
39
Free Space path loss model for the PCS band
40
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 (GB1.3MHz) 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 (GB2.45MHz) 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 (GB3.8MHz) and a site
  to site separation of around 800 meters is
  required

41
Comparison Table for the 3 Alternatives
Working C-C Separation gt/ Guard Band Antenna separation requirement
Alternative 1 Filters in both BTSs 3.85 MHz 1.3MHz Practical antenna separation for 50dB isolation gt1m Vertical sep or gt12m Horizontal sep for same site
Alternative 2 Filter in C2K BTS only 5 MHz 2.45MHz Practical antenna separation for 50dB isolation gt1m Vertical sep or gt12m Horizontal sep for same site
Alternative 3 No filters in both BTSs 6.35 MHz 3.8MHz Unrealistic antenna / site separation
42

• Case 2
• Study on how to mitigate the effect of WCDMA
  Handset (UE) Transmit on C2K Handset Receive

43
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
WCDMA UE Emission Mask

• Minimum Spectrum mask Emission Requirement
• For frequency offset from 2.5 MHz to 3.5 MHz, -
  20 15(?f 2.5) dBc / 1 MHz
• For frequency offset from 3.5 MHz to 7.5 MHz, -
  35 1(?f 3.5) dBc / 1 MHz
• For frequency offset from 7.5 MHz to 8.5 MHz, -
  39 10(?f 7.5) dBc / 1 MHz
• For frequency offset from 8.5 MHz to 12.5 MHz, -
  49 dBc / 1 MHz

3.85MHz offset, - 35.4 dBc/1 MHz
5MHz offset, - 36.5 dBc/1 MHz
45
Isolation requirement for C2K Mobile RF Blocking

• As per the OOBE specifications, at 3.85 MHz away
  from center frequency, WCDMA OOBE would be - 35.4
  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
  3 device) _at_ 3.84 MHz, i.e., 15 dBm/1 MHz
• From the emission specifications we can derive
• At 3.85 MHz frequency offset, WCDMA OOBE is -35.4
  - (-15) - 20.4 dBm/1 MHz
• At 5 MHz frequency offset, WCDMA OOBE is -36.5 -
  (-15) - 21.5 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 - 20.4 - (- 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
Isolation requirement for C2K Mobile Out-of-band
Emissions

• From the emission specifications, at 3.85 MHz
  frequency offset, WCDMA OOBE comes to - 20.4
  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 mobile _at_ 3.85
  MHz offset is (-20.4 - 37) - 57.4 dBm/1 MHz and
  _at_ 5 MHz offset it is - 58.5 dBm/1 MHz
• Acceptable interference at C2K mobile is - 116
  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 - 57.4 - (-116) 58.6 dB
• Amount of isolation required to take care of the
  OOBE for C2K Mobile with 5 MHz frequency offset
  is - 58.5 - (- 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
WCDMA Handset Tx affecting CDMA Handset
RxSummary

• 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 lt10 m ,
  there will be C2K Forward Link capacity
  degradation
• Hence, with lt 10 m mobile separation and 5 MHz
  C-C frequency spacing of carriers, there will be
  very negligible C2K DL capacity degradation

48
Field Trial in India to demonstrate co-existence
of WCDMA and CDMA

• CDMA frequency for testing UL1900-1910 MHz /
  DL1980 - 1990 MHz (1010 MHz)
• WCDMA frequency for testing UL1920- 1980 MHz /
  DL2110 -2170 MHz (6060 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

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
Conclusion

• WCDMA(1920-1980 MHz for Node B reception) and
  CDMA(UL1900-1910MHz/DL1980-1990 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(GB1.3 MHz) C-C separation.

51
SUGGESTIONS
52

• (1) Allocate additional 800 MHz (5 MHz from
  889-894)
• (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
(1) Additional spectrum in 800 MHz
54
How to get Additional Spectrum in 800 MHz Band
Two ways to increase spectrum in 800MHz
Increase it from 2020mhz to 2525mhz
Reconsider allocation to BSNL /MTNL
55
Present Allocation in 800 MHz
Present Allocation in 800MHz
International
India
824-844MHz / 869-889MHz (2020 MHz)
824-849MHz / 869-894MHz (2525 MHz)
56
Increase 800 MHz bandwidth from 2020 MHz to
2525 MHz How to achieve?

• In India 844-849 (5MHz)not allocated- wasted
• Why corresponding downlink portion (889-894MHz)
  is earmarked for GSM.
• Path forward shift GSM from this portion to DCS
  1800 MHz band

57
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
  (889-894) 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 4th Cellular operators TRAI Reco of 13th May
  2005 on Spectrum Related Issues para 3.5.4 at
  pages 69 70
• Arguments Against
• No argument

58
Reconsider allocation to BSNL/MTNL

• No reservation for BSNL/MTNL for the future.
• In GSM no. of subscribers of MTNL as on 30.6.06
  is 2.17 Million and for CDMA about 1.5 lakh
  (Delhi Mumbai).
• They have 4 CDMA carriers (55Mhz) 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 BSNLMTNL 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

• (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 1880-1900MHz
• In metro and large urban areas wherever cor-DECT
  is not used.
• This spectrum is wasted
• Reconsideration required.

60
Suggested Spectrum Allocation
    800 MHz Band 800 MHz Band 800 MHz Band 800 MHz Band 800 MHz Band 800 MHz Band 800 MHz Band 800 MHz Band 800 MHz Band 800 MHz Band 800 MHz Band 800 MHz Band 800 MHz Band 800 MHz Band
CDMA   1 2 3 3 4 5 5 6 7 8 9 9 0 0
800 824 - 849 / 869 - 894       824 - 849 824 - 849 824 - 849 824 - 849     869 - 894 869 - 894 869 - 894 869 - 894  
                               
    1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band 1900 MHz Band
CDMA   1 2 3 3 4 5 5 6 7 8 9 9 0 0 1 2 3 3 4 5 5 6 7 8 9 9 0 0
PCS 1900 1880 - 1910 / 1960 - 1990                     1880 - 1910 1880 - 1910 1880 - 1910 1880 - 1910 1880 - 1910             1960 - 1990 1960 - 1990 1960 - 1990 1960 - 1990 1960 - 1990    
                                                           
Wherever Cor-DECT frequency is not allocated
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• (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.

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Spectrum for Wi-MAX

• 2300-2400 MHz, 2500-2690 MHz, 3300-3800MHz 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 lt1 to cover the administrative
  cost.

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