Is EPDCCH supported by default all rel-11 and later devices? Do operators deploy it?
One of the major enhancements in 3GPP Release 11 is the introduction of a new downlink control channel, the Enhanced Physical Downlink Control Channel (EPDCCH ). The standardization of the E-PDCCH was necessary to support new features like CoMP, downlink MIMO and the considered introduction of a new carrier type with 3GPP Release 12 all with the intention to support the following goals:
- Support of increased control channel capacity.
- Support of frequency-domain ICIC.
- Achieve improved spatial reuse of control channel resources.
- Support beamforming and/or diversity.
- Operate on a new carrier type and in MBSFN subframes.
- Coexist on the same carrier as legacy Rel-8 and Rel-10 devices.
Based on the requirements the E-PDCCH uses a similar design to the one of the Physical Data Shared Channel (PDSCH). Instead of using first symbols of a subframe, where the Downlink Control Information (DCI) is spread over the entire bandwidth, the E-PDCCH uses the same resources as the PDSCH.
Thanks for your response.
Can I then conclude that if a UE supports downlink MIMO it necessarily supports also EDPCCH?
ePDCCH: New enhanced PDCCH introduced in 3GPP release 11 to increase control channel capacity .
Yes Operator deploy it for PDCCH capacity improvement.
the eNodeB configures EPDCCH resources for newly accessed UEs when the PDCCH resources are insufficient and RB resources are not used up.