Cell Specific Reference Signal: (36.211)
- Transmitted in all downlink subframes in a cell supporting PDSCH transmission
- eNodeB transmit as Downlink Reference Signal.
- Equivalent to CPICH in UMTS network.
- Used by UE for Channel Estimation, Cell Selection, Cell Re-selection, and Handover.
- Allocated REs are distributed both in Time Domain and Frequency Domain.
- REs allocated to the Cell Specific Reference Signal are dependent update Physical Layer Cell Identity.
- RE allocation cycles once every 6 Physical Layer Cell Identities. E.g. Physical Layer Cell ID 6 has the same RE allocation as Physical Layer Cell ID 0.
- REs allocated to Cell Specific Reference Signal also depends on No Of Transmit Antenna.
- Once UE read the PSS and SSS, and consequently identified the Physical Layer Cell ID, then UE can find out the REs allocated to the Cell Specific Reference Signal and the Sequence used to generate the Cell Specific Reference Signal.
- If a RE is allocated to the Cell Specific Reference Signal on One Antenna Port, the corresponding RE on the other Antenna Ports are left Empty.
According to 36.211
- Transmitted in all downlink subframes in a cell supporting PDSCH transmission
- eNodeB transmit as Downlink Reference Signal.
- Equivalent to CPICH in UMTS network.
- Used by UE for Channel Estimation, Cell Selection, Cell Re-selection, and Handover.
- Allocated REs are distributed both in Time Domain and Frequency Domain.
- REs allocated to the Cell Specific Reference Signal are dependent update Physical Layer Cell Identity.
- RE allocation cycles once every 6 Physical Layer Cell Identities. E.g. Physical Layer Cell ID 6 has the same RE allocation as Physical Layer Cell ID 0.
- REs allocated to Cell Specific Reference Signal also depends on No Of Transmit Antenna.
- Once UE read the PSS and SSS, and consequently identified the Physical Layer Cell ID, then UE can find out the REs allocated to the Cell Specific Reference Signal and the Sequence used to generate the Cell Specific Reference Signal.
- If a RE is allocated to the Cell Specific Reference Signal on One Antenna Port, the corresponding RE on the other Antenna Ports are left Empty.
According to 36.211
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