Method and apparatus for receiving data in user equipment of supporting multimedia broadcast multicast service

Abstract

A method and an apparatus for receiving data in a User Equipment (UE) supporting a Multimedia Broadcast Multicast Service (MBMS) are provided. A method of receiving data by a UE which supports an MBMS includes obtaining first indication information indicating a Multicast/Broadcast over a Single Frequency Network (MBSFN) subframe reserved for an MBSFN, obtaining second indication information indicating a subframe in the MBSFN subframe, the subframe decoding a Physical Multicast CHannel (PMCH), and when although a first subframe is indicated as the MBSFN subfame, the first subframe is not indicated to decode a PMCH and is not of a subframe for a Positioning Reference Signal (PRS), receiving a Physical Downlink Control CHannel (PDCCH) of the first subframe and decoding a corresponding Physical Downlink Shared CHannel (PDSCH).

What is claimed is: 
     
       1. A method of receiving data by a UE Equipment (UE) which supports a Multimedia Broadcast Multicast Service (MBMS), the method comprising:
 detecting, if the UE is in transmission mode 9, a Physical Downlink Control Channel (PDCCH) in a subframe indicated by a higher layer parameter mbsfn-SubframeConfigList; and   decoding a Physical Downlink Shared CHannel (PDSCH) corresponding to the PDCCH in the subframe,   wherein the subframe is not indicated by higher layers to decode Physical Multicast CHannel (PMCH), and   wherein the subframe is not configured by higher layers to be part of a Positioning Reference Signal (PRS) occasion.   
     
     
       2. The method of  claim 1 , wherein the PRS occasion is only configured within MBSFN subframes. 
     
     
       3. The method of  claim 1 , wherein cyclic prefix length used in subframe # 0  is normal cyclic prefix. 
     
     
       4. The method of  claim 1 , further comprising:
 obtaining Multicast CHannel (MCH) scheduling information; and   if the subframe is indicated to interrupt transmission of Multicast Traffic CHannel (MTCH) by the MCH scheduling information, detecting the PDCCH in the subframe and decoding the PDSCH corresponding to the PDCCH in the subframe.   
     
     
       5. The method of  claim 1 , further comprising:
 when the subframe is indicated to decode the PMCH, receiving and decoding the PMCH of the subframe.   
     
     
       6. The method of  claim 5 , wherein when the subframe is indicated to decode the PMCH, the PDCCH of the subframe is to received. 
     
     
       7. The method of  claim 5 , wherein when the subframe is indicated to decode the PMCH, the subframe is decoded by applying an extended cyclic prefix. 
     
     
       8. The method of  claim 7 , wherein when the subframe is not indicated to decode the PMCH, the subframe is decoded by applying all of the extended cyclic prefix and a general cyclic prefix. 
     
     
       9. The method of  claim 1 , wherein Cyclic Redundancy Check (CRC) is attached to the PDCCH and the CRC is scrambled by the Cell Radio Network Temporary ID (C-RNTI) with DCI format 1A or 2C intended for the UE. 
     
     
       10. A User Equipment (UE) for supporting a Multimedia Broadcast Multicast Service (MBMS), the UE comprising:
 a transceiver configured to transmit and receive a signal;   a controller configured to detect a Physical Downlink Control Channel (PDCCH) in a subframe indicated by a higher layer parameter mbsfn-SubframeConfigList if the UE is in transmission mode 9, and to decode a Physical Downlink Shared CHannel (PDSCH) corresponding to the PDCCH in the subframe;   wherein the subframe is not indicated by higher layers to decode Physical Multicast CHannel (PMCH), and   wherein the subframe is not configured by higher layers to be part of a Positioning Reference Signal (PRS) occasion.   
     
     
       11. The UE of  claim 10 , wherein the PRS occasion is only configured within MBSFN subframes. 
     
     
       12. The UE of  claim 10 , wherein cyclic prefix length used in subframe # 0  is normal cyclic prefix. 
     
     
       13. The UE of  claim 10 , wherein the transceiver obtains Multicast CHannel (MCH) scheduling information, and
 if the subframe is indicated to interrupt transmission of Multicast Traffic CHannel (MTCH) by the MCH scheduling information, the controller detects the PDCCH in the subframe and decodes the PDSCH corresponding to the PDCCH in the subframe.   
     
     
       14. The UE of  claim 10 , wherein when the subframe is indicated to decode the PMCH, the controller receives and decodes the PMCH of the subframe. 
     
     
       15. The UE of  claim 14 , wherein when the subframe s indicated to decode the PMCH, the controller does not receive the PDCCH of the subframe. 
     
     
       16. The UE of  claim 14 , wherein when the subframe is indicated to decode the PMCH, the controller decodes the subframe by applying an extended cyclic prefix. 
     
     
       17. The UE of  claim 16 , wherein when the subframe is not indicated to decode the PMCH, the controller decodes the subframe by applying all of the extended cyclic prefix and a general cyclic prefix. 
     
     
       18. The UE of  claim 10 , wherein Cyclic Redundancy Check (CRC) is attached to the PDCCH and the CRC is scrambled by the Cell Radio Network Temporary ID (C-RNTI) with DCI format 1A or 2C intended for the UE. 
     
     
       19. A method of receiving data performed by a user equipment (UE) in a communication system supporting a multimedia broadcast multicast service (MBMS), the method comprising:
 identifying that the UE is in transmission mode 9;   detecting a physical downlink control channel (PDCCH) with a cyclic redundancy check (CRC) scrambled by an identifier of the UE in a specific subframe among subframes reserved for multicast/broadcast over a single frequency network (MBSFN), wherein the subframes reserved for the MBSFN are indicated by a higher layer parameter; and   decoding a physical downlink shared channel (PDSCH) corresponding to the PDCCH in the specific subframe,   wherein the specific subframe is not indicated by higher layers to decode physical multicast channel (PMCH), and   wherein the specific subframe is not configured by the higher layers to be part of a positioning reference signal (PRS) occasion and the PRS occasion is only configured within the subframes.    
     
     
       20. The method of claim 19, wherein the detecting of the PDCCH comprises:
 detecting the PDCCH with the CRC scrambled by the identifier of the UE in the specific subframe which is not configured by the higher layers to be part of the PRS occasion which is only configured within the subframes in case that a cyclic prefix length used in subframe #0 is a normal cyclic prefix.    
     
     
       21. The method of claim 19, further comprising:
 obtaining multicast channel (MCH) scheduling information; and   in case that the specific subframe is indicated to interrupt transmission of multicast traffic channel (MTCH) by the MCH scheduling information, detecting the PDCCH in the specific subframe and decoding the PDSCH corresponding to the PDCCH in the specific subframe.    
     
     
       22. The method of claim 19, further comprising:
 in case that the specific subframe is indicated to decode the PMCH, receiving and decoding the PMCH of the specific subframe.    
     
     
       23. The method of claim 22, wherein, in case that the specific subframe is indicated to decode the PMCH, the PDCCH of the specific subframe is not received.  
     
     
       24. The method of claim 22, wherein, in case that the specific subframe is indicated to decode the PMCH, the specific subframe is decoded by applying an extended cyclic prefix.  
     
     
       25. The method of claim 24, wherein, in case that the specific subframe is not indicated to decode the PMCH, the specific subframe is decoded by applying all of the extended cyclic prefix and a general cyclic prefix.  
     
     
       26. The method of claim 19, wherein the detecting the PDCCH comprises:
 detecting the PDCCH with the CRC scrambled by a cell radio network temporary ID (C-RNTI) with downlink control information (DCI) format 1A or 2C intended for the UE.    
     
     
       27. The method of claim 19,
 wherein the identifier of the UE by which the CRC is scrambled comprises a cell radio network temporary ID (C-RNTI), and   wherein the PDCCH carries downlink control information (DCI) in DCI format 1A or 2C intended for the UE.    
     
     
       28. A user equipment (UE) in a communication system supporting a multimedia broadcast multicast service (MBMS), the UE comprising:
 a transceiver; and   a controller configured to:
 identify that the UE is in transmission mode 9, 
 detect, via the transceiver, a physical downlink control channel (PDCCH) with a cyclic redundancy check (CRC) scrambled by an identifier of the UE in a specific subframe among subframes reserved for multicast/broadcast over a single frequency network (MBSFN), wherein the subframes reserved for the MBSFN are indicated by a higher layer parameter, and 
 decode a physical downlink shared channel (PDSCH) corresponding to the PDCCH in the specific subframe, 
   wherein the specific subframe is not indicated by higher layers to decode physical multicast channel (PMCH), and   wherein the specific subframe is not configured by the higher layers to be part of a positioning reference signal (PRS) occasion, and the PRS occasion is only configured within the subframes.    
     
     
       29. The UE of claim 28, wherein the controller is further configured to:
 detect, the PDCCH with the CRC scrambled by the identifier of the UE in the specific subframe which is not configured by the higher layers to be part of the PRS occasion which is only configured within the subframes in case that a cyclic prefix length used in subframe #0 is a normal cyclic prefix.    
     
     
       30. The UE of claim 28, wherein the transceiver is configured to obtain multicast channel (MCH) scheduling information, and
 wherein the controller is further configured to, if the specific subframe is indicated to interrupt transmission of a multicast traffic channel (MTCH) by the MCH scheduling information, detect the PDCCH in the specific subframe and decode the PDSCH corresponding to the PDCCH in the specific subframe.    
     
     
       31. The UE of claim 28, wherein, in case that the specific subframe is indicated to decode the PMCH, the controller is further configured to receive and decode the PMCH of the specific subframe.  
     
     
       32. The UE of claim 31, wherein, in case that the specific subframe is indicated to decode the PMCH, the controller does not receive the PDCCH of the specific subframe.  
     
     
       33. The UE of claim 31, wherein, in case that the specific subframe is indicated to decode the PMCH, the controller is further configured to decode the specific subframe by applying an extended cyclic prefix.  
     
     
       34. The UE of claim 33, wherein, in case that the specific subframe is not indicated to decode the PMCH, the controller is further configured to decode the specific subframe by applying all of the extended cyclic prefix and a general cyclic prefix.  
     
     
       35. The UE of claim 28, wherein the controller is further configured to detect the PDCCH with the CRC scrambled by a cell radio network temporary ID (C-RNTI) with downlink control information (DCI) format 1A or 2C intended for the UE.  
     
     
       36. The UE of claim 28,
 wherein the identifier of the UE by which the CRC is scrambled comprises a cell radio network temporary ID (C-RNTI), and   wherein the PDCCH carries downlink control information (DCI) in DCI format 1A or 2C intended for the UE.