Radiocommunications Advisory Guidelines (Co-ordinating the operation of transmitters in the 500 MHz Bands)
Possible interference scenariosPossible interference scenarios
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Possible interference scenarios
The cellular implementation of RCS is such that an RCS base transmit frequency in one cluster of cells is never used by an RCS customer transmit frequency in another cluster. However, they can operate on either the lower band or the upper band. Table 1 below shows the affected frequency assignments for RCS base station, RCS customer and RCS repeaters.
| RCS Parameters | Tx freq (MHz)Note 1 | Rx freq (MHz) |
|---|---|---|
| Base Station | 503.1 (2), 505.5 (4), 511.9 (1'), 514.3 (3') | 513.1 (2'), 515.5 (4'), 501.9 (1), 504.3 (3) |
| Customer Station | 501.9 (1), 504.3 (3), 513.1 (2'), 515.5 (4') | 511.9 (1'), 514.3 (3'), 503.1 (2), 505.5 (4) |
| Repeater Station(could use any Tx or Rx frequency) | 501.9 (1), 503.1 (2), 504.3 (3), 505.5 (4), 511.9 (1'), 513.1 (2') 514.3 (3'), 515.5 (4') | 511.9 (1'), 513.1 (2'), 514.3 (3'), 515.5 (4'), 501.9 (1), 503.1 (2), 504.3 (3), 505.5 (4) |
Table 1 RCS frequency assignments
Note 1. Tx frequencies only shown for information purposes
Note 2. (2) Figures in brackets represent RCS channel numbers
As can be seen from Table 1 there are four affected RCS frequencies (channels) in each of the lower and upper bands. Under spectrum licensing, spectrum licensed transmitters may operate in the lower band or the upper band. This gives rise to two possible interference scenarios:
Scenario 1 Spectrum licensed transmitters operating in the lower band (501 - 505 MHz) with RCS base or repeater or customer receivers; and
Scenario 2 Spectrum licensed transmitters operating in the upper band (511 - 515 MHz) with RCS base or repeater or customer receivers.