Reverse Access Channel used by MS Initiate Communication or Respond to Paging Channel. A reverse channel is first spread with WALSH to 307.2Kbps and then becomes 1.2288Mcps after long code modulation. The long code here not only spreads spectrum, but implements the function of channelization. “Data burst randomizer” means discarding repeated chips during the transmission … Read more
IP Multicast Service Models Having Three Multicast Any-Source Multicast (ASM) Source-Filtered Multicast (SFM) and Source-Specific Multicast (SSM) which work as below. Any-Source Multicast (ASM) Destination ‘multicast’ address only defines ‘Group’ membership Will accept from ‘any source’ (unicast) First and oldest model, defined in RFC 1112 Source-Filtered Multicast (SFM) Destination ‘multicast’ address only defines ‘Group’ membership … Read more
Main work of SCCPCH Secondary Common Control Physical Channel for wcdma is as below. Carrying FACH and PCH, SF = 256 – 4 Pilot: used for demodulation TFCI: Transport Format Control Indication, used for describe data Format The Secondary Common Control Physical Channel (S-CCPCH) is used to carry the FACH and PCH transport channels. … Read more