ZTE Corporation ZXG-BTS2 Manuale Utente
ZXG10-BTS (V2.9) Technical Manual
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Confidential and Proprietary Information of ZTE CORPORATION
TCH/FS: The full speed speech TCH, with a total rate up to
22.8Kbit/s
TCH/HS: Half speed speech TCH, with a total rate up to 11.8Kbit/s
TCH/HS: Half speed speech TCH, with a total rate up to 11.8Kbit/s
ii. Data TCH
TCH/F9.6: 9.6Kbit/s full-rate data traffic channel
TCH/F4.8: 4.8Kbit/s full-rate data traffic channel
TCH/H4.8: 4.8Kbit/s half-rate data traffic channel
TCH/F2.4: ≤ 2.4Kbit/s full-rate data traffic channel
TCH/H2.4: ≤ 2.4Kbit/s half-rate data traffic channel
TCH/F4.8: 4.8Kbit/s full-rate data traffic channel
TCH/H4.8: 4.8Kbit/s half-rate data traffic channel
TCH/F2.4: ≤ 2.4Kbit/s full-rate data traffic channel
TCH/H2.4: ≤ 2.4Kbit/s half-rate data traffic channel
2. Control channel (CCH)
Control channels carry signaling or synchronization data, and they can
be divided into three types: broadcasting channel, common control
be divided into three types: broadcasting channel, common control
channel and dedicated control channel.
i. BCH
i. BCH
Designed to broadcast various messages to MS, broadcasting
channel is a kind of point-to-multipoint unidirectional downlink CCH
(that is, unidirectional transmission from BS to MS), including three
(that is, unidirectional transmission from BS to MS), including three
kinds of channels:
FCCH: Frequency calibration channel, carrying information used in
FCCH: Frequency calibration channel, carrying information used in
MS frequency calibration.
SCH: Synchronization channel, carrying identification information of
SCH: Synchronization channel, carrying identification information of
MS frame synchronization and BTS (Base Transceiver Station)
BCCH: Broadcasting control channel, used to send cell information;
In every BTS, there is always a transceiver with such a channel to
BCCH: Broadcasting control channel, used to send cell information;
In every BTS, there is always a transceiver with such a channel to
broadcast system information to all MSs in this cell.
ii. Common control channel
As a point-to-multipoint bi-directional CCH, CCCH is shared by MSs
in the network. There are three types of such channels:
PCH: Paging channel, used by BTS to page MS (down channel).
RACH: Random access channel, used by MS to apply for random
in the network. There are three types of such channels:
PCH: Paging channel, used by BTS to page MS (down channel).
RACH: Random access channel, used by MS to apply for random
network-access, that is, for dedicated control channel (up channel).
AGCH: Access granted channel, used by BTS to answer the MS
random access request, that is. to assign a dedicated control
AGCH: Access granted channel, used by BTS to answer the MS
random access request, that is. to assign a dedicated control
channel or directly a TCH (down channel).
iii. Dedicated control channel
Dedicated control channel is a point-to-point bi-directional CCH. It
is allocated by the BTS to MS to fulfill point-to-point transmission
is allocated by the BTS to MS to fulfill point-to-point transmission
between BTS and MS.
SDCCH: Stand-alone DCCH, used to transmit channel allocation
information and other relevant information; It consists of:
SDCCH/8: Stand-alone dedicated control channel
SDCCH/4: The stand-alone dedicated control channel combined with
SDCCH/8: Stand-alone dedicated control channel
SDCCH/4: The stand-alone dedicated control channel combined with
BCCH /CCCH