Method and apparatus for establishing a mapping between enhanced downlink control channel resource and antenna port
View Patent ↗The present invention provides a method and apparatus for establishing a mapping between an enhanced downlink control channel resource and an antenna port. The method includes: establishing a mapping between each resource element in an enhanced downlink control channel resource and an antenna port; and establishing a correspondence between control data carried by the resource element and an antenna port corresponding to the resource element, so as to send or receive, according to a reference signal corresponding to the antenna port, the control data carried by the resource element. The present invention determines a manner for establishing a mapping between a resource on an ePDCCH and an antenna port, and meets a requirement of LTE development.
1. A method for establishing a mapping between an enhanced downlink control channel resource and an antenna port, comprising:
establishing a mapping between each resource element carrying control data in an enhanced downlink control channel resource and an antenna port, wherein
the enhanced downlink control channel resource comprises multiple resource block pairs (PRB pairs), each of the multiple PRB pairs comprises multiple orthogonal frequency division multiplexing (OFDM) symbols in a time domain, and each of the multiple OFDM symbols corresponds to an OFDM symbol index, wherein
each of the multiple PRB pairs further comprises multiple subcarriers in a frequency domain, and each of the multiple subcarriers corresponds to a subcarrier index, wherein
resource elements carrying control data in odd-indexed OFDM symbols and odd-indexed subcarriers being mapped to a first antenna port,
resource elements carrying control data in odd-indexed OFDM symbols and even-indexed subcarriers being mapped to a second antenna port,
resource elements carrying control data in even-indexed OFDM symbols and even-indexed subcarriers being mapped to the first antenna port, and
resource elements carrying control data in even-indexed OFDM symbols and odd-indexed subcarriers being mapped to the second antenna port; and
sending, according to a reference signal corresponding to the first antenna port or the second antenna port, the control data carried by the resource element, wherein establishing the mapping between each resource element in the enhanced downlink control channel resource and the first antenna port or second antenna port is performed by each of the multiple PRB pairs, wherein the multiple PRB pairs have a same mapping between the resource element and the first antenna port or second antenna port.
2. The method for establishing a mapping between an enhanced downlink control channel resource and an antenna port according to claim 1 , wherein establishing the mapping between each resource element in the enhanced downlink control channel resource and the first antenna port or second antenna port is performed by each of the multiple PRB pairs, each of the multiple PRB pairs corresponds to a PRB pair index, and the first antenna port or second antenna port mapped to the resource element in odd-indexed PRB pairs is opposite to that in even-indexed PRB pairs.
3. An apparatus, comprising:
at least one processor, configured to establish a mapping between each resource element carrying control data in an enhanced downlink control channel resource and an antenna port; and
a transmitter, configured to transmit the control data carried by the resource element according to a reference signal corresponding to the first antenna port or the second antenna port,
wherein
the enhanced downlink control channel resource comprises multiple resource block pairs (PRB pairs), each of the multiple PRB pairs comprises multiple orthogonal frequency division multiplexing (OFDM) symbols in a time domain, and each of the multiple OFDM symbols corresponds to an OFDM symbol index, wherein
each of the multiple PRB pairs further comprises multiple subcarriers in a frequency domain, and each of the multiple subcarriers corresponds to a subcarrier index, wherein
resource elements carrying control data in odd-indexed OFDM symbols and odd-indexed subcarriers being mapped to a first antenna port,
resource elements carrying control data in odd-indexed OFDM symbols and even-indexed subcarriers being mapped to a second antenna port,
resource elements carrying control data in even-indexed OFDM symbols and even-indexed subcarriers being mapped to the first antenna port, and
resource elements carrying control data in even-indexed OFDM symbols and odd-indexed subcarriers being mapped to the second antenna port,
wherein the at least one processor is further configured to establish a mapping between each resource element in the enhanced downlink control channel resource and the first antenna port or second antenna port on each of the multiple PRB pairs, wherein the multiple PRB pairs have a same mapping between the resource element and the first antenna port or second antenna port.
4. The apparatus according to claim 3 , wherein the at least one processor is further configured to establish a mapping between each resource element in the enhanced downlink control channel resource and the first antenna port or second antenna port on each of the multiple PRB pairs, wherein
each of the multiple PRB pairs corresponds to a PRB pair index, and the first antenna port or second antenna port mapped to the resource element in odd-indexed PRB pairs is opposite to that in even-indexed PRB pairs.