Radio Protocol Architecture in LTE
canada goose uk black friday The EUTRAN radio protocol model specifies the protocols buy canada goose jacket terminated between UE and eNB. The protocol stack follows the standard guidelines for radio protocol architectures (ITU R M1035) and is thus quite similar to the WCDMA protocol stack of UMTS. IP stack). canada goose uk black friday
buy canada goose jacket cheap Physical layer: The physical layer forms the complete layer 1 of the protocol stack and provides the basic bit transmission functionality over air. In LTE the physical layer is driven by OFDMA in the downlink and SC FDMA in canada goose store the uplink. FDD and TDD mode can be combined (depends on UE capabilities) in the cheap Canada Goose same canada goose black friday sale physical layer. The physical layer uses physical channels to transmit data over the radio path. Physical channels are dynamically mapped to the available resources (physical resource blocks and antenna ports). To higher layers the physical layer offers its data transmission functionality via transport channels. Like in UMTS a transport channel is a block oriented transmission service with certain characteristics regarding bit rates, delay, collision risk and reliability. Note that in contrast to 3G canada goose coats WCDMA or even 2G GSM there are no dedicated transport or physical Canada Goose sale channels anymore, as all canada goose coats on sale resource mapping is dynamically canada goose driven by the scheduler. buy canada goose jacket cheap
canadian goose jacket MAC (Medium Access Control): MAC is the lowest layer 2 protocol and its main function is to drive the transport channels. From higher layers MAC is fed with logical channels which are in one to Canada Goose online one canadian goose jacket correspondence with radio bearers. Each logical channel is given a priority and MAC has to multiplex logical channel data onto transport channels. In the receiving direction canada goose outlet obviously demultiplexing of logical https://www.pick-canadagoose.com channels from transport channels must take place. Further functions of MAC Canada Goose Jackets will be collision handling and explicit UE identification. An important function for the performance is the HARQ functionality which is official part of MAC and available for some transport channel types. canadian goose jacket
Canada Goose Coats On Sale RLC (Radio Link Control): Each radio bearer possesses one RLC instance Canada Goose Coats On Sale
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Canada Goose Parka PDCP (Packet Data Convergence Protocol): Each radio bearer also uses one PDCP instance. PDCP is responsible for header compression (ROHC RObustcompression makes sense for IP datagram’s, but not for signaling. Thus the PDCP entities for signaling radio bearers will usually do ciphering/deciphering only. Canada Goose Parka
buy canada goose jacket RRC (Radio Resource Control): RRC is canada goose clearance the access stratum specific control buy canada goose jacket
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