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Aastra CORDLESS PHONE, Планирование установки

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Aastra CORDLESS PHONE Скачать руководство пользователя страница 33

5/1531-ANF 901 14 Uen D3 2013-11-28

33

T

RAFFIC

 

CAPACITY

4.4 

Utilization of base stations, ELU31 boards 
and LIM

4.4.1 B-channel 

traffic

In a typical business environment a standard dimensioning value for 
traffic per portable is 0.2 E. This includes a solid safety margin - actual 
traffic is almost always lower. The tables below show the maximum 
number of portables that can be handled by an ELU31 board and the 
resulting number of portables per base station depending on number of 
base stations that are connected to a single ELU31 board. The tables 
are given for ELU31 boards with 16 channels and with 32 channels.

Содержание CORDLESS PHONE

Страница 1: ...INSTALLATION PLANNING INSTALLATION PLANNING 5 1531 ANF 901 14 D3 2013 11 28 Cordless Phone M Wenzel mwenzel Tero Silvennoinen...

Страница 2: ...of this material may be reproduced in any form without the written permission of the copyright owner The contents of this document are subject to revision without notice due to continued progress in...

Страница 3: ...er of portables needed the estimated traffic generated per portable and the Grade Of Service GOS accepted by the customer For more detailed description see chapter 4 Traffic capacity on page 31 In thi...

Страница 4: ...running MGU 2 to synchronize the master ELU31 board thus with ring in index4_mode synchronization all media gateways ELU31 4 index_4_mode can have ELU31 3 boards as bus slave All boards on the ring mu...

Страница 5: ...l boards in the ring must be configured to enable synchronization distribution see CXCFC in CORDLESS PHONE command description All media gateways shall be configured to retrieve synchronization from E...

Страница 6: ...1 ring member MX ONE Lite LBP24 with MGU max 1 ring member For a more detailed description regarding synchronization and synchro nization ring cable see installation instructions for CORDLESS PHONE Al...

Страница 7: ...ring It can be bus slave but not recommended in other configurations 2 3 Base stations Only the following MX ONE base stations are compatible with the ELU31 board Base station defined in document Ins...

Страница 8: ...e maximum cable length for the synchronization ring using a cable with wire diameter 0 6 mm is 1300 metres per segment for more details about requirements on the cable see installation instruction COR...

Страница 9: ...off and power on the PP is recommended to avoid No System in the display If a PP is not powered off before leaving a site the portable will loose contact with the system the display will show No syst...

Страница 10: ...position and material of furniture machines air conditioning and the position of the base station in such an environment Because of these unpredictable conditions it is not possible to give any hard r...

Страница 11: ...ation coverage of car parks large factory sites and the like to protect the base stations from wind and weather This case can be placed directly against a wall or fixed to a pole It can also be used i...

Страница 12: ...mmediately above and below as well The useful range through floors and ceiling varies between 0 and 8m 2 floors radius See figure 12 Measurement of a typical cell size on page 23 In this section diffe...

Страница 13: ...sioned without reason as it causes unnecessary load that may adversely affect portable performance Note In a configuration that maximise number of base stations to reduce the number of external hand o...

Страница 14: ...but should be used with care in configurations with highly mobile users see figure 5 Example of maximum coverage config uration ELU31 has 32 B channel configuration on page 15 For maximum coverage of...

Страница 15: ...ible so that when one Server goes down or is out of order the other will back up this area The disadvantages of this configuration is that it will cause more inter Server roaming and hand overs A prer...

Страница 16: ...ssigned host base station Indoors The use of non standard antennas for indoor applications is limited to specific situations where the radio coverage is the most important factor Examples in which non...

Страница 17: ...hese areas They can also cause reflections and bit errors X ray rooms in hospitals protected by lead walls or computer rooms in banking buildings protected against unwanted interference do not allow r...

Страница 18: ...e base stations should be connected to ELU31 boards in the same Media Gateway When that is not possible should the ELU31 boards should be in a Media Gateway served by same server The boarder between a...

Страница 19: ...bile traffic area It is important to install the base stations with an equal distance from where the users frequently enter the area Using BS370 See figure 10 Coverage of the BS370 without extra anten...

Страница 20: ...ipped with an extra antenna In this example hand over is not possible between the two coverage areas To get optimal performance the BS370 shall be placed in line of sight from the designated base stat...

Страница 21: ...termine an average cell size With the average cell size base station positions can be indicated on the map together with the area covered by each base station Also difficult spots can be mapped After...

Страница 22: ...e station in a typical position and then walking around with a portable By setting the PP in site survey mode an listening to the sound quality of the portable and looking at its display the coverage...

Страница 23: ...and the type of construction one or two more random checks in typical areas can be done to verify the first measurement The typical cell size is then found by averaging the values If the measurements...

Страница 24: ...on page 24 Note The deployment of BS370 is done after the site survey and instal lation of the base stations When installing the BS370 the site survey tool should be used BS370 is not recommended to...

Страница 25: ...verage range different types of walls have different impact on the signal range For list of the most common types and the approximate range achieved through these materials see table 1 Wall types and...

Страница 26: ...at the same time see figure 14 Open stairway or atrium on page 26 Figure 14 Open stairway or atrium 3 9 3 3 Fire resistant walls doors The same facts applies for fire walls as for normal walls mention...

Страница 27: ...in a corner of the building Coverage is not a problem in itself but it must be seen in the context of the overall planning There are various ways of providing coverage for a stairway Either the base s...

Страница 28: ...Environment When providing coverage in a metal hall for example a production hall or storage building there are a number of issues which call for addi tional attention The dimensions of the hall and...

Страница 29: ...y in distinguishing between the different transmitted bits Therefore the base stations in a metal hall must be sited in a way that the time delay spread is minimized This means in turn that you must l...

Страница 30: ...rtant to the client In a typical case the speech coverage area is 5 20 meter This must be verified with site survey Place the base station as low as possible without having something to be placed in f...

Страница 31: ...onfig scan The number of slots is equivalent with number of simultaneous call that can be carried Important factors that determine the dimensioning and traffic capacity of the MX ONE are The grade of...

Страница 32: ...n be handled by a base station as a function of traffic intensity per portable and GOS in respect to stationary users see Table 3 Number of portables stationary user per base station and highly mobile...

Страница 33: ...affic per portable is 0 2 E This includes a solid safety margin actual traffic is almost always lower The tables below show the maximum number of portables that can be handled by an ELU31 board and th...

Страница 34: ...105 21 126 21 143 20 143 17 RFP 0 5 0 20 16 16 32 16 48 16 64 16 80 16 96 16 109 15 109 13 0 5 0 25 14 14 28 14 42 14 56 14 70 14 84 14 88 12 88 11 1 0 0 05 64 64 128 64 192 64 256 64 320 64 384 64 4...

Страница 35: ...7 135 27 162 27 189 27 206 25 PPs per 0 5 0 15 18 18 36 18 54 18 72 18 90 18 108 18 126 18 138 17 RFP 0 5 0 20 13 13 26 13 39 13 52 13 65 13 78 13 91 13 103 12 0 5 0 25 11 11 22 11 33 11 44 11 55 11 6...

Страница 36: ...8 44 7 44 6 44 5 0 5 0 25 14 14 28 14 36 12 36 9 36 7 36 6 36 5 36 4 1 0 0 05 64 64 128 64 179 59 179 44 179 35 179 29 179 25 179 22 1 0 0 10 33 33 66 33 91 30 91 22 91 18 91 15 91 13 91 11 1 0 0 15 2...

Страница 37: ...back plane GOS Erlang E 0 05 0 10 0 15 0 20 0 25 0 5 161 80 53 40 32 1 0 177 88 59 44 35 2 0 196 98 65 49 39 GOS E number of base stations 1 2 3 4 5 6 7 8 PPs per 0 5 0 05 54 54 108 54 161 53 161 40...

Страница 38: ...e than 4 users per 100 m 2 where the number of base stations is determined not by the areas to be covered but by the number of portables to be served the maximum capacity of an ELU31 board with 32 cha...

Страница 39: ...affect the avail able capacity in the radio environment To enable the best possible performance it is important to know that there are base station planning issues that must be considered The issues...

Страница 40: ...sly transmitting the dummy bearer is due to that the portable device listens to one dummy bearer and uses the information to lock on to the system synchronize check base station identity system capabi...

Страница 41: ...ness and possibility to make intra system hand overs i e possibility to move from one base to another with an ongoing seamless voice conversation 5 4 Radio Interference A DECT system is as described e...

Страница 42: ...ity in the shared radio resource will obviously decrease In practice and to some extent reuse of the channels will be done depending on the position of portable devices and base stations Imagine that...

Страница 43: ...ECT multiple base station system is preferred compared to a high number of single cell systems How smooth a lot of single cell systems will work depends on the traffic capacity need With low call rate...

Страница 44: ...o base station signaling pattern Illustration of transmission patterns for different base stations 6 1 BS332 Figure 17 Shows antenna pattern for BS330 external dipole with BS332 external dipole Illust...

Страница 45: ...901 14 Uen D3 2013 11 28 45 APPENDIX B RADIO BASE STATION SIGNALING PATTERN 6 2 BS330 Figure 18 Measured antenna pattern for antenna 1 vertical and horizontal Same pattern for antenna 2 but 90 degree...

Страница 46: ...CORDLESS PHONE 46 5 1531 ANF 901 14 Uen D3 2013 11 28 6 3 BS340 Figure 19 BS340 ant1 Vertical Polarization Figure 20 BS340 ant1 Horizontal Polarization...

Страница 47: ...5 1531 ANF 901 14 Uen D3 2013 11 28 47 APPENDIX B RADIO BASE STATION SIGNALING PATTERN Figure 21 BS340 ant2 Vertical Polarization Figure 22 BS340 ant2 Horizontal Polarization...

Страница 48: ...340 with non standard antenna on page 49 illustrates the different transmission patterns of the directional single antenna NTM KRENB 101 118 1 The outdoor cell size in free space may be up to 450 m ra...

Страница 49: ...5 1531 ANF 901 14 Uen D3 2013 11 28 49 APPENDIX B RADIO BASE STATION SIGNALING PATTERN Figure 24 Transmission pattern of base station BS340 with non standard antenna...

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