multiframe การใช้

• For this reason, a CRC-4 multiframe alignment word is needed.
• RACH uses GSM 51 frame multiframe structure in the uplink to transmit information.
• The CRC covers one 12 ms multiframe ( 8?.5 ms frames ).
• Obviously, the receiver has to be told where the multiframe begins ( synchronization ).
• In 1987, Henri Vanlier introduced the term " ", or " multiframe ", to refer to the comics page as a semantic unit.
• The CRC-4 multiframe alignment word is the set combination " 001011 ", which is introduced in the first bits of the frames that do not contain the FAS signal.
• For example, for E1 trunks the CAS signaling bits are updated once per multiframe of 16 frames ( every 2 milliseconds ) while for T1 ESF trunks the superframe is 24 frames ( 3 milliseconds ).
• If DTX DL is deactivated, is better to use "'RxQual FULL "'values, they are more precise, because it uses all frames on the SACCH multiframe, whether they have been transmitted from the base station or not.
• A single slot consists of 255 usable symbols, the remaining time is used up with synchronisation sequences and turning on / off, etc . A single " frame " consists of 4 slots, and a " multiframe " ( whose duration is 1.02 seconds ) consists of 18 frames.
• The aim of this system is to avoid loss of synchronization due to the coincidental appearance of the sequence " 0011011 " in a time slot other than the TS0 of a frame with FAS . To implement the CRC code in the transmission of 2 Mbit / s frames, a CRC-4 multiframe is built, made up of 16 frames.