After the device’s radio context has been restablished, the cellular tower notifies the MME, which in turn notifies the S-GW, which is now able to route the message to the correct radio tower. Finally, the tower sends the data to the device through the device’s LTE modem interface .
Read moreWhat is rate matching in 5G?
The rate-matching is to extract the exact set of bits to be transmitted within a given TTI . The rate-matching for Turbo coded transport channels is defined for each code block: there are three basic steps composing a rate-matching. Namely, sub-block interleaver, bit collection, and bit selection.
Read moreWhat is code word in 5G?
The output of a coding chain is a codeword. 5G supports transmission of up to 8 layers to a single user on the downlink. This means that there can be up to eight streams transmitted in parallel.
Read moreWhat is code block in LTE?
for code block segmentation used on LTE-Advanced channel coding physical layer (PHY) is presented in this paper. Code block segmentation is a generic procedure which is commonly applied before turbo encoding . Its main function is to fragment a large transport block into smaller code blocks.
Read moreWhat is CRC attachment?
Transport Block CRC Attachment A cyclic redundancy check (CRC) is used for error detection in transport blocks . The entire transport block is used to calculate the CRC parity bits. The transport block is divided by a cyclic generator polynomial, described as g C R C 24 A in section 5.1.
Read moreWhat is the PRB in LTE?
Abstract: In LTE (Long Term Evolution) systems, the PRB (Physical Resource Block ) usage ratio is considered importantly to manage the QoS (Quality of Service) of LTE traffic. As the PRB usage ratio increases, the resource may not be allocated in a timely and reliable manner to the users of the cell.
Read moreHow does LTE calculate PRB?
Physical Resource Block (PRB) = 2*Resource Block = 12 Subcarriers x 14 OFDM in 1ms . RE can deliver 2, 4, 6, 8 bits in QPSK, 16QAM, 64QAM, 256QAM respectively. If we calculate for 64QAM as 6bits since 256QAM not widely spread (check Samsung S7 in T-Mobile). 20MHz ==> 100 PRB ==> 100*168*1000 = 16,800,000 RE in 1 s.
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