BSS Description B10 (3FL10473A-ed 2)

1. Evolium BSS Introduction
Telecom Features
ALCATEL BSS Description 28
Features defined in the GSM recommendations
Cellular Environment
Frequency Hopping
Radio Frequency hopping
Base Band Frequency hopping
Radio Power Control uplink and downlink (BTS / MS)
Discontinuous Transmission (DTX)
Discontinuous Reception (DRX) (MS)
Call Re-establishment by MS
Enhance Full Rate (EFR)
Adaptive MultiRate codec (AMR)
Tandem Free Operation (TFO)
Multiband operation
Multiple CCCH
EVOLIUM
ALCATEL BSS Description
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Cellular environment: define different types of cell configurations to meet the requirements of
geography and the strategies of the Network Operator.
RPC uplink and downlink: ensure the dynamic balance between the quality of the radio link in both
directions (i.e., uplink and downlink), against interference with other cells. It also contributes to
power conservation.RPC is achieved through BTS Radio Power Control and MS Radio Power Control.
Discontinuous Transmission/Voice Activity Detection:decrease the average interference level generated
by the network in both the uplink and downlink directions. This feature, in association with FH,
significantly improves spectrum efficiency without jeopardizing the quality of the telephony service.
Discontinuous Reception:conserve battery power by allowing the Mobile Station to switch off its receiver
and data processing in the idle mode. This occurs except for the short time when the Mobile Station
expects a message from the BTS. The Mobile Station only listens to that part of the paging channel
corresponding to its paging group.
Call re-establishment by the MS: re-establish a connection in progress after a lower layer failure.
Enhanced Full-Rate: allow the use of codecs with an improved speech encoding algorithm, which
provides enhanced speech quality on full-rate channels
Adaptive MultiRate codec (AMR): Adaptive Multi-Rate is a new codec defined by ETSI. This technology
relies on a set of pre-defined "codec modes" (AMR-FR and AMR-HR), each one providing optimum
performance under specific radio conditions.
Tandem Free Operation (TFO): TFO provides a better voice quality by avoiding unnecessary successive
coding and decoding operations in the case of mobile to mobile calls. TFO is therefore a feature of
great importance, as the percentage of mobile to mobile calls increases with the number of
subscribers.
Multiple CCCH: to increase the signaling bandwidth on the Air interface, 3GPP defines up to 4 time slots
to carry the CCCH information (TS0, TS2, TS4 and TS6). The Alcatel-Lucent solution supports multiple
CCCH on TS0 and TS2 in G2 BSCs and MX BSCs.
All Rights Reserved © 2007, Alcatel-Lucent
3FL10473ADAAWBZZA Edition 02
EVOLIUM ALCATEL BSS Description Page 28