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CMU-K20/K21/K22/K23/K24
GPRS Signalling and EGPRS
1115.6088.12 4.201
E-12
Slot Offset
Timeslot (no. 0 to 7) that is to be taken as the first downlink
timeslot when the MS is in multislot operation (downlink timeslot
offset parameter in the GPRS_TEST_MODE_CMD).
Testmode with
ACK
Enable or disable the operating mode where the mobile
periodically transmits a PACKET_UPLINK_ACK_NACK
message (GSM 04.60) while it is in test mode B.
RLC Mode
(Testmode B)
Explicit setting of the downlink RLC mode for a packet data
connection in test mode B
(Service Selection = Test Mode B)
.
According to standard GSM 04.14, test mode B corresponds to
Unacknowledged
operation where the MS loops back all data
received. The alternative
Acknowledged
mode is to be used for
special applications.
Bit Stream
Bit pattern (pseudo random sequence) that the CMU transmits
to the MS in GPRS test mode.
Remote control
CONFigure:NETWork:PDATa[:GPRS]:CSCHeme <Mode>
PROCedure:NETWork:PDATa[:GPRS]:CSCHeme <Mode>
CONFigure:NETWork:PDATa:EGPRs:PSCHeme <Mode>
PROCedure:NETWork:PDATa:EGPRs:PSCHeme <Mode>
CONFigure:NETWork:PDATa:EGPRs:PSCHeme:IREDundancy <Enable>
CONFigure:NETWork:PDATa:GPRS:PCMChannel <Type>
CONFigure:NETWork:PDATa:USF <USF>
PROCedure:NETWork:PDATa:UDCYcle A100 | A100 | A012
CONFigure:NETWork:PDATa:GPRS:EDAllocation <Enable>
CONFigure:NETWork:PDATa:NOPDus <Number>
CONFigure:NETWork:PDATa:SOFFset <Offset>
CONFigure:NETWork:PDATa:GPRS:TWACk <Enable>
CONFigure:NETWork:PDATa:RLCMode ACKN | UNAC
CONFigure:NETWork:PDATa:BITStream <Mode>
PROCedure:NETWork:PDATa:BITStream <Mode>
Incremental
Redundancy
Incremental redundancy (IR) is used on EGPRS channels to minimize the number of data
blocks that have to be transferred repeatedly (retransmitted) until they can be successfully
decoded.
The IR mechanism relies upon the fact that for each input block of information bits, the
EGPRS channel coder provides 2 or 3 output blocks of coded bits with equal length but
different puncturing scheme. In principle, each output block is sufficient for recovering the
original information bits, however, a combination of 2 (or even 3) output blocks leaves more
redundancy bits for error correction and therefore increases the chance of correctly receiving
the data block.
深圳德标仪器
135-1095-0799
Summary of Contents for CMU-K20
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