Compatibility between umts 900/1800 and systems operating in adjacent bands Krakow, March 2007




Yüklə 0.81 Mb.
səhifə1/12
tarix14.04.2016
ölçüsü0.81 Mb.
  1   2   3   4   5   6   7   8   9   ...   12

ECC REPORT 96



Electronic Communications Committee (ECC)

within the European Conference of Postal and Telecommunications Administrations (CEPT)





cOMPATIBILITY BETWEEN umts 900/1800 and systems

operating in adjacent bands

Krakow, March 2007
  1. Executive Summary


This report deals with the compatibility study between UMTS900/1800 and systems operating in adjacent bands.

This report gives the description of the compatibility study methodology, co-existence scenarios, simulation assumptions, and the results for the deployment of UMTS operating in 900 MHz and in 1800 MHz bands taking into account adjacent band systems. Although best effort has been made to provide assumptions and results to encompass the widest range of possible situations, however there might be some country specific cases where different assumptions need to be made. Furthermore it has to be noted that based on the operational experience further analyses may have to be carried out.


Based on the interference analysis, the following conclusions can be made:

  • UMTS900 can be deployed in the same geographical area in co-existence with GSM-R as follows:

  1. There is a priori no need of an additional guard band between UMTS900 and GSM-R, a carrier separation of 2.8 MHz or more between the UMTS900 carrier and the nearest GSM-R carrier is sufficient without prejudice to provisions in point 2). This conclusion is based on Monte Carlo simulations assumed suitable for typical case.

  2. However for some critical cases (e.g. with high located antenna, open and sparsely populated areas served by high power UMTS BS close to the railway tracks, blocking etc, which would lead to assumption of possible direct line of sight coupling) the MCL calculations demonstrate that coordination is needed for a certain range of distances (up to 4 km or more from railway track).

  3. It is beneficial to activate GSM-R uplink power control, especially for the train mounted MS, otherwise the impact on UMTS UL capacity could be important when the UMTS network is using the 5 MHz channel adjacent to the GSM-R band. However, it has to be recognized that this is only applicable in low speed areas as elsewhere the use of uplink control in GSM-R will cause significantly increased call drop out rates.

  4. In order to protect GSM-R operations, UMTS operators should take care when deploying UMTS in the 900 MHz band, where site engineering measures and/or better* filtering capabilities (providing additional coupling loss in order to match the requirements defined for the critical/specific cases) may be needed in order to install UMTS sites close to the railway track when the UMTS network is using the 5 MHz channel adjacent to the GSM-R band.

* Currently, the out-of band interference level is given by 3GPP TS 25.104 V7.4.0
It has to be noted that this study did not address tunnel coverage. Site sharing, which is expected to improve the coexistence, has not been studied either.

  • When UMTS900 is deployed in the same geographical area in co-existence with PMR/PAMR (CDMA PAMR, TETRA, TAPS) operating at frequencies above 915 MHz, some potential interference from PAMR/PAMR BS to UMTS900 BS could be a problem. In order to protect UMTS900 BS, the utilization of interference mitigation techniques is necessary:

    1. Reduced PMR/PAMR BS Tx power

    2. Spatial separation

    3. External filters

    4. Guard band

  • The potential interference from UMTS900 to aeronautical DME operating at frequencies above 972 MHz does not represent any difficulty. The frequency range between 960-972 MHz is not currently used by aeronautical DME but is planned to be used in a near future. Some additional margins may be required for the protection of aeronautical DME operating at frequencies between 960 and 972 MHz, where the required additional margins are dependent on DME carriers and aircraft positions. The studies have shown that the only mitigation techniques, in order to ensure the compatibility between the DME system and UMTS900, that would bring sufficient isolation are: additional filtering and a larger guard band. However these two mitigation techniques are not judged applicable. It has to be noted that the impact of the DME ground station (and FRS if necessary) on the UMTS 900 mobile stations has not been studied in this report and may need additional studies. Therefore, the report suggests that a regulatory solution should be examined. It is necessary that a common approach be used within Europe to ensure the compatibility.

Further compatibility study will be necessary if this frequency range is to be used by DME systems or future aeronautical systems addressed under WRC Agenda Item 1.6.

  • The compatibility study between UMTS900 and MIDS indicated that an additional margin of 17 dB of UMTS900 BS spurious emissions over the frequency range between 1000 MHz and 1206 MHz in reference to 3GPP technical specifications is required for the protection of MIDS terminal receiver. If this additional margin is obtained by the UMTS BS real performance being better than 3GPP technical specifications, no other protection means such as separation distance etc. are required for the protection of MIDS.

  • Potential interference between UMTS1800 and DECT does not appear to be a problem, as the DECT system has a DCA (Dynamic Channel Allocation) mechanism which efficiently avoids an interfered channel except if both systems are deployed indoor. Indeed, although DECT uses DCA, interference analysis shows that in the case of UMTS1800 indoor pico cellular deployment using the frequency channel adjacent to the DECT frequency band, the use of some interference mitigation technique may be necessary to address potential interference to indoor DECT RFP or PP. However, in practice, GSM1800 deployment has demonstrated that no additional interference mitigation techniques are really needed. This statement can be assumed to be extended to the compatibility between UMTS1800 and DECT systems.

  • The analysis indicates that the potential interference between UMTS1800 UE and METSAT Earth Stations should not be a problem.

  • The preliminary interference analysis leads to the conclusion that, with a guard band of 700 kHz, the potential interference from Radio microphones to UMTS1800 BS should not be a problem if the radio microphones maximum transmit power is limited to 13 dBm (20 mW) for hand held microphones and 17 dBm (50 mW) for body worn microphones as recommended in ERC Report 63 and ERC/REC 70-03E.

It should be noted that the interference analysis between UMTS1800 UE and Fixed Services was not considered in the report.

In some European countries, civil/military aeronautical radionavigation system is using the frequency band adjacent to UMTS900, different to the frequency band of civil radionavigation DME, it is also used as safety-of-life application. The frequency plan and the characteristics of the civil/military aeronautical radionavigation system, as well as the interference analysis between UMTS900 and the civil/military aeronautical radionavigation system are not considered in this report.
Table of contents


1 Executive Summary 2

2 Introduction 7

3 Compatibility study between UMTS900 and systems operating in adjacent bands 7

3.1 Systems operating in adjacent bands 7

3.2 Compatibility study between UMTS900 and GSM-R 8

3.2.1 GSM-R system characteristics 8

3.2.2 Interference analysis based on the comparison of out-of-band emissions between UMTS and GSM 10

3.2.2.1 Introduction 10

3.2.2.2 Comparison of UMTS900 and GSM900 out-of-band emissions 10

3.2.2.3 Analysis summary 13

3.2.3 Interference analysis with MCL approach 13

3.2.3.1 Introduction 13

3.2.3.2 Interference analysis results 13

3.2.4 Interference analysis with Monte-Carlo simulations 15

3.2.4.1 UMTS900 and GSM-R deployment and co-existence scenarios 15

3.2.4.2 Simulation assumptions 17

3.2.4.3 Interference analysis method 20

3.2.4.4 Simulation results 21

3.2.4.5 Analysis summary 24

3.2.5 Conclusions 24

3.3 Compatibility consideration between UMTS900 and PMR/PAMR 25

3.3.1 Characteristics of PMR/PAMR systems 25

3.3.1.1 CDMA PAMR system characteristics 25

3.3.1.2 TETRA system characteristics 27

3.3.2 Interference analysis considerations 28

3.3.2.1 Potential interference between UMTS900 and CDMA PAMR at 915 MHz 28

3.3.2.2 Potential interference between UMTS900 and TETRA at 915 MHz 29

3.3.3 Conclusions 29

3.4 Compatibility study between UMTS900 and DME 30

3.4.1 DME and UMTS system characteristics 30

3.4.2 Case Study 34

3.4.3 Interference analysis results 35

3.4.4 Analysis of the results 39

3.4.5 Mitigation techniques and mitigation effects 41

3.4.6 Conclusions 42

3.5 Compatibility study between UMTS900 and MIDS 43

3.5.1 System parameters and co-existence scenario 43

3.5.1.1 Frequency band plan 43

3.5.1.2 System parameters 43

3.5.1.3 Propagation model 47

3.5.1.4 Simulation configuration 47

47


3.5.2 Interference analysis and simulation results 47

3.5.2.1 Level of the UMTS900 signal received by the MIDS terminal (out of the MIDS receiving band) 47

3.5.2.2 Level of the UMTS900 signal received by the MIDS terminal (in the MIDS receiving band) 49

<200 m 52

<-21 dBm 52

<-87 dBm 52

>17 dB 52

200 m 52

-21 dBm 52

-87 dBm 52

17 dB 52

300 m 52

-22 dBm 52

-88 dBm 52

16 dB 52

400 m 52

-23 dBm 52

-89 dBm 52

15 dB 52

500 m 52

-24 dBm 52

-90 dBm 52

14 dB 52

600 m 52

-26 dBm 52

-92 dBm 52

12 dB 52

700 m 52

-28 dBm 52

-94 dBm 52

10 dB 52

800 m 52

-29 dBm 52

-95 dBm 52

9 dB 52

900 m 52

-30 dBm 52

-96 dBm 52

8 dB 52

1000 m 52

-32 dBm 52

-98 dBm 52

6 dB 52

1500 m 52

-36 dBm 52

-102 dBm 52

2 dB 52

2000 m 52

0 dB 52

3.5.3 Conclusions 53

3.6 Conclusions 53

4 Compatibility study between UMTS1800 and systems operating in adjacent bands 55

4.1 Systems operating in adjacent bands 55

4.2 Compatibility study between UMTS1800 and DECT 56

4.2.1 DECT system characteristics 56

4.2.2 UMTS1800 system characteristics 57

4.2.3 Interference analysis between UMTS1800 and DECT 58

4.2.4 Interference analysis and simulation results 59

4.2.5 Conclusions 61

4.3 Compatibility consideration between UMTS1800 and METSAT 61

4.3.1 Main characteristics of METSAT 61

4.3.2 Interference analysis considerations 62

4.3.3 Conclusions 63

4.4 Compatibility consideration between UMTS1800 and Radio microphones 63

4.4.1 Main characteristics of Radio Microphones 63

4.4.2 Interference analysis 65

4.4.3 Conclusions 65

4.5 Compatibility study between UMTS1800 and Fixed Services 65

4.6 Conclusions 65



5 References 66

Annex 1 - GSM900 and UMTS900 ACLR Profiles 67

Annex 2 - Interference analysis calculation with MCL approach for the co-existence between UMTS900 and GSM-R 69

Annex 3 - Abbreviations 76





  1   2   3   4   5   6   7   8   9   ...   12


Verilənlər bazası müəlliflik hüququ ilə müdafiə olunur ©azrefs.org 2016
rəhbərliyinə müraciət

    Ana səhifə