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Reference Planning Concept. Reference Planning Configurations and Reference Networks 25 - 29 April 2005 Dakar David Botha. Workshop for the African Group of Countries. BR/TSD. BCD. Dakar 2005. What is an RPC?. An RPC is an idealised abstract configuration of technical

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Reference planning concept

Reference Planning Concept

Reference Planning Configurations and Reference Networks

25 - 29 April 2005

Dakar

David Botha

Workshop for the African Group of Countries

BR/TSD

BCD

Dakar 2005


What is an rpc

What is an RPC?

An RPC is an idealised abstract configuration of technical

characteristics that can be used for conference planning purposes.

An RPC describes the sum of all relevant technical aspects of a

broadcasting service implementation required for planning

purposes and eventually for the calculations related to plan

modifications during Plan implementation.

An RPC is not associated with any particular system variant

or a real network, but can represent a large number of real

implementations.

Workshop for the African Group of Countries

BR/TSD

BCD

Dakar 2005


Why use an rpc

Why use an RPC?

Thousands of planning configurations

Reception modes for DVB-T:

Portable reception (indoor / outdoor)

Fixed reception (roof top)

Mobile reception

Reception modes for T-DAB:

Mobile reception

Portable indoor reception

DVB-T System variants

Modulation type and code rate (15 types)

Channel bandwidth 7 and 8 MHz (15 x 2 types)

Guard intervals (1/4, 1/8, 1/16, 1/32) (15 x 2 x 4 = 120 variant types)

Workshop for the African Group of Countries

BR/TSD

BCD

Dakar 2005


Derivation of rpc s

Derivation of RPC’s

Workshop for the African Group of Countries

Aspect

Element

Reception mode

Fixed roof-levelPortable outdoorPortable indoor Mobile

Coverage quality (in terms of percentage of locations)

70%95%99%

Network structure

MFN (single transmitter)SFNDense SFN

DVB‑T system variant

from QPSK-1/2to 64-QAM-7/8

Frequency band

Band III (200 MHz)Band IV (500 MHz)Band V (800 MHz)

BR/TSD

Table 3.6-1

Aspects of DVB‑T planning configurations

BCD

Dakar 2005


Derivation of rpc s continued

Derivation of RPC’s continued

Workshop for the African Group of Countries

BR/TSD

BCD

Representative Planning Configurations

Emedref calculated for band III (200 MHz), IV (500 MHz) and V (800 MHz)

Dakar 2005


Derivation of rpc s continued1

Derivation of RPC’s continued

DVB‑T grouping in terms of reception mode:

fixed reception;

portable outdoor reception, mobile reception and lower coverage quality portable indoor reception;

higher coverage quality portable indoor reception.

For reference frequencies:

200 MHz (VHF);

650 MHz (UHF).

Workshop for the African Group of Countries

BR/TSD

BCD

RRC-04 Reference Planning Configurations

Dakar 2005


Derivation of rpc s continued2

Derivation of RPC’s continued

Workshop for the African Group of Countries

BR/TSD

BCD

RRC-04 Reference Planning Configurations

Emedref calculated for VHF (200 MHz) and UHF (650 MHz)

Dakar 2005


Summary of rrc 04 rpc s for dvb t

Summary of RRC-04 RPC’s for DVB-T

RPC

RPC 1

RPC 2

RPC 3

Workshop for the African Group of Countries

Reference location probability

95%

95%

95%

Reference C/N (dB)

21

19

17

Reference (Emed)ref (dB(µV/m)) at 200 MHz

50

67

76

Reference (Emed)ref (dB(µV/m)) at 650 MHz

56

78

88

Typical data capacity (Mbit/s)

20-27

8-24

13-16

(Emed)ref: minimum median equivalent field strength

RPC 1: RPC for fixed roof-level reception

RPC 2: RPC for portable outdoor reception or lower coverage quality portable indoor reception or mobile reception

RPC 3: RPC for higher coverage quality for portable indoor reception.

BR/TSD

RPCs for DVB‑T

BCD

Dakar 2005


Application of rrc 04 rpc s for dvb t

Application of RRC-04 RPC’s for DVB-T

Workshop for the African Group of Countries

BR/TSD

BCD

Interpolation of Reference (Emed)ref (f)

Protection ratios from ITU-R Rec. BT.1368

Dakar 2005


Rrc 04 rpc s for t dab

RRC-04 RPC’s for T-DAB

Workshop for the African Group of Countries

Reference planning configuration

RPC 4

RPC 5

Location probability

99%

95%

Reference C/N (dB)

15

15

Reference (Emed)ref (dB(µV/m)) at 200 MHz

60

66

(Emed)ref: minimum median equivalent field strength

RPC 4: RPC for mobile reception

RPC 5: RPC for portable indoor reception

BR/TSD

Table 3.6-3

RPCs for T‑DAB

BCD

Protection ratios in ITU-R Rec. BS.1660

Dakar 2005


Implications when using rpc s

Implications when using RPC’s

Workshop for the African Group of Countries

BR/TSD

BCD

Advantages

  • Particularly useful when allotment planning is used

  • Does not require detail planning prior to notification

  • Allows for the selection of a specific system variant at a later stage

  • Simplifies planning by reducing the number of configurations

  • Not all technical criteria need be available at planning time, e.g. protection ratios

Disadvantages

  • Selected RPC’s may not exactly represent your requirement

  • Administration still need to make some basic decisions before planning

  • Increase the analysis computation time if more than 36 test points are defined per allotment

Dakar 2005


What is a reference network rn

What is a Reference network (RN)?

An RN is an idealised representation of real network

implementations.

Reference networks exhibit a high degree of geometrical

symmetry and homogeneous transmitter characteristics.

Reference networks are characterised by the parameters:

Number of transmitters

Distance between transmitters

Transmitter network geometry

Transmitter power

Transmitter antenna height

Transmitter antenna pattern

Service area

Workshop for the African Group of Countries

BR/TSD

BCD

Dakar 2005


Why use an rn

Why use an RN?

Allotments have no transmitters associated

An RN represent the interference potential of an allotment

Single transmitter case

Preferable to use real transmitter characteristics and assignments

Reference Single Frequency Networks

Generally larger service areas than a single transmitter

All transmitters may not be known during the establishment of a frequency plan

Compatibility analysis and synthesis based on the use of a suitable RN

Plan modifications will rely on RN for allotments not yet converted to assignments

Workshop for the African Group of Countries

BR/TSD

BCD

Dakar 2005


Definition of reference networks

Definition of Reference Networks

General design considerations:

RN’s defined in terms of the service application

Effective antenna heights set to 150 metres

Field strength prediction based on ITU-R Rec. P.1546-1

Statistical field strength summation using k-LNM method

Design based on noise limited coverage, use power margin to obtain “interference limited” coverage

Hexagonal service areas

Hexagonal or triangular network configurations

Open and closed network structures

For open network structures the service area is 15% larger than the network structure

Workshop for the African Group of Countries

BR/TSD

BCD

Dakar 2005


Definition of reference networks continued

Definition of Reference Networks continued

RN categories:

Workshop for the African Group of Countries

BR/TSD

BCD

DVB-T

Dakar 2005


Definition of reference networks continued1

Definition of Reference Networks continued

RN categories:

Workshop for the African Group of Countries

BR/TSD

BCD

T-DAB

Dakar 2005


Implications when using rn s

Implications when using RN’s

Workshop for the African Group of Countries

BR/TSD

BCD

Advantages

  • Can represent the interference potential of allotments

  • Does not require detail planning prior to notification

  • Allows for the selection of a specific system variant at a later stage

  • Not all technical criteria need be available at planning time, e.g. protection ratios for specific system variants

Disadvantages

  • Selected RN’s may not exactly represent unique requirements

  • Administration still need to make some basic decisions before planning

  • Considerably increase the calculation time of the analysis

Dakar 2005


Examples of rn s

Examples of RN’s

Workshop for the African Group of Countries

BR/TSD

BCD

FIGURE A.3.7-3

RN 2 (small service area SFN)

FIGURE A.3.7-7

Geometry of the RN

Dakar 2005


Notifying allotment requirements

Notifying allotment requirements

For DVB-T:

Define and notify allotment geographical area (DA1)

Select the band (VHF or UHF)

Select the reception mode (fixed, mobile or portable, or higher quality portable indoor)

Select the RPC

Select the type of application (Large SFN, small SFN, small SFN urban or semi-closed small SFN)

Select the RN

Notify the allotment (DT2)

Workshop for the African Group of Countries

BR/TSD

BCD

Dakar 2005


Notifying allotment requirements continued

Notifying allotment requirements continued

For T-DAB:

Define and notify allotment geographical area (DA1)

Select the reception mode (mobile or portable indoor)

Select the RPC and RN

Notify the allotment (DS2)

Workshop for the African Group of Countries

BR/TSD

BCD

Dakar 2005


Reference planning concept

Workshop for the African Group of Countries

BR/TSD

BCD

Thank you

Merci

Dakar 2005


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