Mbms coexistence in a network with multiple types of base stations

Abstract

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a femto cell. The apparatus determines MBSFN subframes at a frequency of a first base station. The first base station has a first power class, the apparatus has a second power class lower than the first power class. The apparatus determines, in the MBSFN subframes, a first set of symbols used for control information and a second set of symbols used for MBSFN signals by the first base station. The apparatus transmits, at the frequency, unicast control information in a subset of the first set of symbols. The apparatus transmits, at the frequency, unicast data with a reduced power in the second set of symbols.

What is claimed is: 
     
         1 . A method of wireless communication of a second base station, comprising:
 determining multicast broadcast single frequency network (MBSFN) subframes used by a first base station at a frequency, the first base station having a first power class, the second base station having a second power class lower than the first power class;   determining, in the MBSFN subframes, a first set of symbols used for control information by the first base station and a second set of symbols used for MBSFN signals by the first base station;   transmitting, at the frequency, unicast control information in a subset of the first set of symbols; and   transmitting, at the frequency, unicast data with a reduced power in the second set of symbols.   
     
     
         2 . The method of  claim 1 , further comprising transmitting, at the frequency, a system information block (SIB)  13  in non-MBSFN subframes and a multicast control channel (MCCH) change notification in the first set of symbols. 
     
     
         3 . The method of  claim 2 , further comprising:
 determining resources within the second set of symbols used by the first base station for transmitting a multicast control channel (MCCH); and   transmitting, synchronously with the first base station at the frequency, the MCCH in the second set of symbols within the determined resources.   
     
     
         4 . The method of  claim 3 , further comprising:
 determining additional resources within the second set of symbols used by the first base station for transmitting a multicast traffic channel (MTCH); and   transmitting, synchronously with the first base station at the frequency, the MTCH in the second set of symbols within the determined additional resources.   
     
     
         5 . The method of  claim 4 , wherein the second base station has an M1 interface with a multimedia broadcast multicast service (MBMS) gateway and an M2 interface with a multicast coordination entity (MCE), the method further comprising joining an MBMS session associated with a broadcast multicast service center (BM-SC). 
     
     
         6 . The method of  claim 4 , wherein the second base station has an M1 interface with a multimedia broadcast multicast service (MBMS) gateway, the method further comprising:
 receiving user service description (USD) bootstrapping information;   obtaining a USD based on the USD bootstrapping information; and   obtaining a multicast Internet Protocol (IP) address and a source IP address from the USD,   wherein the SIB  13 , the MCCH change notification, the MCCH, and the MTCH are based on the obtained multicast IP address and the obtained source IP address.   
     
     
         7 . The method of  claim 4 , wherein the second base station has an M1 interface with a multimedia broadcast multicast service (MBMS) gateway and an M2 interface with a multicast coordination entity (MCE), the method further comprising:
 sending an MBMS session start initiation to a broadcast multicast service center (BM-SC) through the MCE, a mobility management entity (MME), and the MBMS gateway to initiate an MBMS session with the BM-SC.   
     
     
         8 . The method of  claim 1 , further comprising receiving information from a home evolved node B (eNB) (HeNB) management system (HMS), wherein the MBSFN subframes of the first base station are determined based on the information received from the HMS. 
     
     
         9 . The method of  claim 8 , wherein the information from the HMS indicates an MBSFN configuration, and the method further comprises transmitting, based on the MBSFN configuration, at least one of a system information block (SIB)  13 , a multicast control channel (MCCH) change notification, an MCCH synchronously with the first base station at the frequency, or a multicast traffic channel (MTCH) synchronously with the first base station at the frequency. 
     
     
         10 . The method of  claim 1 , further comprising receiving a system information block (SIB)  2  from the first base station, wherein the MBSFN subframes are determined based on the received SIB  2 . 
     
     
         11 . The method of  claim 1 , further comprising:
 receiving a system information block (SIB)  13  from the first base station;   obtaining an MBSFN configuration based on the received SIB  13 ; and   transmitting, at the frequency, the SIB  13  and a multicast control channel (MCCH) change notification based on the MBSFN configuration.   
     
     
         12 . The method of  claim 1 , further comprising receiving multicast channel (MCH) scheduling information (MSI), wherein the MBSFN subframes are further determined based on the received MSI. 
     
     
         13 . The method of  claim 12 , further comprising:
 receiving a system information block (SIB)  13  from the first base station;   obtaining a multicast control channel (MCCH) from the first base station based on the received SIB  13 ;   obtaining an MBSFN configuration based on the obtained MCCH and the SIB  13 ; and   transmitting, at the frequency, the SIB  13 , an MCCH change notification, and the MCCH based on the MBSFN configuration, wherein the MCCH is transmitted synchronously with the first base station at the frequency.   
     
     
         14 . An apparatus of wireless communication comprising:
 means for determining multicast broadcast single frequency network (MBSFN) subframes used by a first base station at a frequency, the first base station having a first power class, the apparatus having a second power class lower than the first power class;   means for determining, in the MBSFN subframes, a first set of symbols used for control information by the first base station and a second set of symbols used for MBSFN signals by the first base station;   means for transmitting, at the frequency, unicast control information in a subset of the first set of symbols; and   means for transmitting, at the frequency, unicast data with a reduced power in the second set of symbols.   
     
     
         15 . The apparatus of  claim 14 , further comprising means for transmitting, at the frequency, a system information block (SIB)  13  in non-MBSFN subframes and a multicast control channel (MCCH) change notification in the first set of symbols. 
     
     
         16 . The apparatus of  claim 15 , further comprising:
 means for determining resources within the second set of symbols used by the first base station for transmitting a multicast control channel (MCCH); and   means for transmitting, synchronously with the first base station at the frequency, the MCCH in the second set of symbols within the determined resources.   
     
     
         17 . An apparatus for wireless communication, comprising:
 a memory; and   at least one processor coupled to the memory and configured to:
 determine multicast broadcast single frequency network (MBSFN) subframes used by a first base station at a frequency, the first base station having a first power class, the apparatus having a second power class lower than the first power class; 
 determine, in the MBSFN subframes, a first set of symbols used for control information by the first base station and a second set of symbols used for MBSFN signals by the first base station; 
 transmit, at the frequency, unicast control information in a subset of the first set of symbols; and 
 transmit, at the frequency, unicast data with a reduced power in the second set of symbols. 
   
     
     
         18 . The apparatus of  claim 17 , wherein the at least one processor is further configured to transmit, at the frequency, a system information block (SIB)  13  in non-MBSFN subframes and a multicast control channel (MCCH) change notification in the first set of symbols. 
     
     
         19 . The apparatus of  claim 18 , wherein the at least one processor is further configured to:
 determine resources within the second set of symbols used by the first base station for transmitting a multicast control channel (MCCH); and   transmit, synchronously with the first base station at the frequency, the MCCH in the second set of symbols within the determined resources.   
     
     
         20 . The apparatus of  claim 19 , wherein the at least one processor is further configured to:
 determine additional resources within the second set of symbols used by the first base station for transmitting a multicast traffic channel (MTCH); and   transmit, synchronously with the first base station at the frequency, the MTCH in the second set of symbols within the determined additional resources.   
     
     
         21 . The apparatus of  claim 20 , wherein the apparatus has an M1 interface with a multimedia broadcast multicast service (MBMS) gateway and an M2 interface with a multicast coordination entity (MCE), and wherein the at least one processor is further configured to join an MBMS session associated with a broadcast multicast service center (BM-SC). 
     
     
         22 . The apparatus of  claim 20 , wherein the apparatus has an M1 interface with a multimedia broadcast multicast service (MBMS) gateway, and wherein the at least one processor is further configured to:
 receive user service description (USD) bootstrapping information;   obtain a USD based on the USD bootstrapping information; and   obtain a multicast Internet Protocol (IP) address and a source IP address from the USD,   wherein the SIB  13 , the MCCH change notification, the MCCH, and the MTCH are based on the obtained multicast IP address and the obtained source IP address.   
     
     
         23 . The apparatus of  claim 20 , wherein the apparatus has an M1 interface with a multimedia broadcast multicast service (MBMS) gateway and an M2 interface with a multicast coordination entity (MCE), and wherein the at least one processor is further configured to:
 send an MBMS session start initiation to a broadcast multicast service center (BM-SC) through the MCE, a mobility management entity (MME), and the MBMS gateway to initiate an MBMS session with the BM-SC.   
     
     
         24 . The apparatus of  claim 17 , wherein the at least one processor is further configured to receive information from a home evolved node B (eNB) (HeNB) management system (HMS), wherein the MBSFN subframes of the first base station are determined based on the information received from the HMS. 
     
     
         25 . The apparatus of  claim 24 , wherein the information from the HMS indicates an MBSFN configuration, and wherein the at least one processor is further configured to transmit, based on the MBSFN configuration, at least one of a system information block (SIB)  13 , a multicast control channel (MCCH) change notification, an MCCH synchronously with the first base station at the frequency, or a multicast traffic channel (MTCH) synchronously with the first base station at the frequency. 
     
     
         26 . The apparatus of  claim 17 , wherein the at least one processor is further configured to receive a system information block (SIB)  2  from the first base station, wherein the MBSFN subframes are determined based on the received SIB  2 . 
     
     
         27 . The apparatus of  claim 17 , wherein the at least one processor is further configured to:
 receive a system information block (SIB)  13  from the first base station;   obtain an MBSFN configuration based on the received SIB  13 ; and   transmit, at the frequency, the SIB  13  and a multicast control channel (MCCH) change notification based on the MBSFN configuration.   
     
     
         28 . The apparatus of  claim 17 , wherein the at least one processor is further configured to receive multicast channel (MCH) scheduling information (MSI), wherein the MBSFN subframes are further determined based on the received MSI. 
     
     
         29 . The apparatus of  claim 28 , wherein the at least one processor is further configured to:
 receive a system information block (SIB)  13  from the first base station;   obtain a multicast control channel (MCCH) from the first base station based on the received SIB  13 ;   obtain an MBSFN configuration based on the obtained MCCH and the SIB  13 ; and   transmit, at the frequency, the SIB  13 , an MCCH change notification, and the MCCH based on the MBSFN configuration, wherein the MCCH is transmitted synchronously with the first base station at the frequency.   
     
     
         30 . A computer-readable medium, associated with a second base station and storing computer executable code for wireless communication, comprising code for:
 determining multicast broadcast single frequency network (MBSFN) subframes used by a first base station at a frequency, the first base station having a first power class, the second base station having a second power class lower than the first power class;   determining, in the MBSFN subframes, a first set of symbols used for control information by the first base station and a second set of symbols used for MBSFN signals by the first base station;   transmitting, at the frequency, unicast control information in a subset of the first set of symbols; and   transmitting, at the frequency, unicast data with a reduced power in the second set of symbols.