Method and system for configuring, sending and receiving physical multicast channel
Disclosed are a method and system for configuring a Physical Multicast Channel (PMCH), a method and system for acquiring a PMCH configuration and a method and system for sending and receiving subframes based on the PMCH configuration. The configuration method includes the following step: a base station configuring information for the PMCH or a Multimedia Broadcast and Multicast Service (MBMS) through a high-layer signalling and/or a predefinition and/or a Multicast Control Channel (MCCH). The configured information is at least one of a transmission band, a frequency-domain location, an initial location of an Orthogonal Frequency Division Multiplexing (OFDM) symbol of the PMCH, a transmission subframe cluster of the PMCH, a number of transmission layers or used port indexes and a number of ports of the PMCH and MBMS reference signal pattern information.
1. A method for sending a channel based on a Physical Multicast Channel (PMCH) configuration, comprising: sending, by a base station, a PMCH and/or an Enhanced Physical Downlink Control Channel (EPDCCH) and/or a Multicast Control Channel (MCCH) according to Downlink Control Information (DCI) or predefinition indication;
wherein when a current subframe sent by the base station is a PMCH or MBMS subframe, always sending, by the base station, the MCCH at a port corresponding to a first layer in the PMCH subframe; or
when a port corresponding to an MBMS data layer is the same as a port adopted for the MCCH, not mapping, by the base station, MBMS data on a resource element of the MCCH; or
when the port corresponding to the MBMS data layer is different from the port adopted for the MCCH, mapping, by the base station, the MBMS data on the resource element of the MCCH.
2. The method according to claim 1 , wherein when a current subframe sent by the base station is a PMCH or MBMS subframe, the base station does not send the DCI over the current subframe, and the base station sends the DCI in the current subframe and/or the next X PMCH or MBMS subframes over a previous subframe, and indicates the subframe corresponding to the DCI to a terminal via N bits in the DCI, wherein 0<X<5, and 0<N<4.
3. The method according to claim 1 , wherein when a current subframe sent by the base station is a PMCH or MBMS subframe, the base station determines the number of symbols for sending the EPDCCH according to a configured initial location of the PMCH or an MBMS, and
when the first one or two Orthogonal Frequency Division Multiplexing (OFDM) symbols in a subframe are not configured to send the PMCH, the base station sends the EPDCCH via the first one or two OFDM symbols.
4. A system for sending a channel based on a Physical Multicast Channel (PMCH) configuration, comprising: a first channel sending unit, located on a base station side and configured to send a PMCH and/or an Enhanced Physical Downlink Control Channel (EPDCCH) and/or a Multicast Control Channel (MCCH) according to Downlink Control Information (DCI) or predefinition indication,
the first channel sending unit is further configured to always send the MCCH at a port corresponding to a first layer in the PMCH subframe, when a current subframe sent by the base station is a PMCH or MBMS subframe, or
the first channel sending unit is further configured to not map MBMS data on a resource element of the MCCH, when a port corresponding to an MBMS data layer is the same as a port adopted for the MCCH, or
the first channel sending unit is further configured to map the MBMS data on the resource element of the MCCH, when the port corresponding to the MBMS data layer is different from the port adopted for the MCCH.
5. A method for receiving a channel based on a Physical Multicast Channel (PMCH) configuration, comprising:
receiving, by a terminal, a PMCH and/or an Enhanced Physical Downlink Control Channel (EPDCCH) and/or a Multicast Control Channel (MCCH) according to Downlink Control Information (DCI) or predefinition indication configured by a base station,
wherein when a current DownLink (DL) subframe received by the terminal is a PMCH or MBMS subframe, always receiving, by the terminal, the MCCH at a port corresponding to a first layer in the PMCH subframe or the MBMS subframe, or
when a port corresponding to an MBMS data layer is the same as a port adopted for the MCCH, not receiving, by the terminal, MBMS data on a resource element of the MCCH, or
when the port corresponding to the MBMS data layer is different from the port adopted for the MCCH, receiving, by the terminal, the MBMS data on the resource element of the MCCH.
6. The method according to claim 5 , wherein when a current subframe received by the terminal is a PMCH or MBMS subframe, the terminal receives the DCI in the current subframe and/or the next X PMCH or MBMS subframes over a previous subframe, and acquires the subframe corresponding to the DCI by detecting N bits in the DCI, wherein 0<X<5, and 0<N<4.
7. The method according to claim 5 , further comprising: always not receiving, by the terminal, MBMS data on a resource element of the MCCH.
8. A system for receiving a channel based on a Physical Multicast Channel (PMCH) configuration, comprising: a first channel receiving unit, located on a terminal side and configured to receive a PMCH and/or an Enhanced Physical Downlink Control Channel (EPDCCH) and/or a Multicast Control Channel (MCCH) according to Downlink Control Information (DCI) or predefinition indication configured by a base station,
the first channel receiving unit is further configured to always receive the MCCH at a port corresponding to a first layer in the PMCH subframe or the MBMS subframe, when a current DownLink (DL) subframe received by the terminal is a PMCH or MBMS subframe, or
the first channel receiving unit is further configured to not receive MBMS data on a resource element of the MCCH, when a port corresponding to an MBMS data layer is the same as a port adopted for the MCCH, or
the first channel receiving unit is further configured to the MBMS data on the resource element of the MCCH, when the port corresponding to the MBMS data layer is different from the port adopted for the MCCH.