# US 2015/0146604 A1 · Method and apparatus for transmitting and receiving mbsfn subframe > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0146604 A1 - Document ID: US20150146604A1 - Status: Published application - Kind: A1 - Application number: 14/368,193 - Filed: 2013-12-23 - Published: 2015-05-28 - Earliest claimed: 2013-02-01 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Bong Hoe Kim; Suck Chel Yang; Yun Jung Yi; Dong Youn Seo - Web page: https://patentgrep.com/patent/US20150146604A1 ## CPC - H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services - H04L 1/0046: {Code rate detection or code type detection (H04L1/0038 takes precedence; detection of the data rate H04L25/0262; for packet format H04L1/0091)} - H04L 1/1671: {the supervisory signal being transmitted together with control information} - H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)} - H04L 5/0092: {Indication of how the channel is divided} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/001: {the frequencies being arranged in component carriers} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/30: Resource management for broadcast services - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Disclosed is a method for transmitting a multicast broadcast single frequency network (MBSFN) subframe, including: configuring, by a base station (BS), at least one subframe, among a plurality of subframes included in a downlink radio frame, to an MBSFN subframe; determining, by the BS, resource allocation with respect to a tracking reference signal in the at least one configured MBSFN subframe based on whether a physical multicast channel is transmitted in the at least one configured MBSFN subframe; and transmitting, by the BS, the tracking reference signal through an MBSFN subframe in which the PMCH is not transmitted among the at least one configured MBSFN subframe. ## Claims ### Claim at position 1 1-10. (canceled) ### Claim 11 A method for multimedia broadcast and multicast service (MBMS), the method, performed by user equipment (UE) comprising: receiving from a primary cell (P-cell) first system information of a secondary cell (S-cell) aggregated with the P-cell; receiving second system information for the MBMS; receiving data from the S-cell based on the MBMS; receiving first multicast control channel (MCCH) change information by monitoring a physical downlink control channel (PDCCH) masked based on a MBMS radio network temporary identifier (M-RNTI) on a common search space (CSS) of the S-cell; and receiving information changed via the MCCH based on the first MCCH change information. ### Claim 12 (depends on 11) The method of claim 11, wherein the first MCCH change information is transmitted via a multicast broadcast single frequency network (MBSFN) subframe of the S-cell. ### Claim 13 (depends on 11) The method of claim 11, wherein the UE is available to receive the first MCCH change information only when the UE is in a radio resource control connected (RRC_CONNECTED) state. ### Claim 14 (depends on 11) The method of claim 11 further comprising: receiving second MCCH change information from the P-cell, and receiving information changed via the MCCH based on the second MCCH change information, wherein the UE is available to receive the second MCCH change information when the UE is in a radio resource control idle (RRC_IDLE) state or an RRC_CONNECTED state, and wherein the second MCCH change information is transmitted via a multicast broadcast single frequency network (MBSFN) subframe of the P-cell. ### Claim 15 (depends on 14) The method of claim 14, wherein the first MCCH change information is transmitted via a MBSFN subframe of the S-cell, wherein the second MCCH change information is transmitted via a MBSFN subframe of the P-cell, wherein the MBSFN subframe of the P-cell is at least one of subframe 1, subframe 2, subframe 3, subframe 6, subframe 7 and subframe 8 in a frequency division duplex (FDD) frame, and wherein the MBSFN subframe of the S-cell is at least one of subframe 1, subframe 2, subframe 3, subframe 6, subframe 7 and subframe 8 in an FDD frame. ### Claim 16 A wireless device adapted for receiving a multimedia broadcast and multicast service (MBMS), the wireless device comprising: a radio frequency (RF) transceiver to transmit or receive a radio signal; and a processor operatively coupled with the RF transceiver and configured to control the RF transceiver to: receive from a primary cell (P-cell) first system information of a secondary cell (S-cell) aggregated with the P-cell; receive second system information for the MBMS; receive data from the S-cell based on the MBMS; receive first multicast control channel (MCCH) change information by monitoring a physical downlink control channel, PDCCH, masked based on a MBMS radio network temporary identifier (M-RNTI) on a common search space (CSS) of the S-cell; and receive information changed via the MCCH based on the first MCCH change information. ### Claim 17 (depends on 16) The wireless device of claim 16, wherein the processor is further configured to control the RF transceiver to receive the first MCCH change information via a multicast broadcast single frequency network (MBSFN) subframe of the S-cell. ### Claim 18 (depends on 16) The wireless device of claim 16, wherein the processor is further configured to make the RF transceiver available to receive the first MCCH change information when the wireless device is in a radio resource control connected (RRC_CONNECTED) state. ### Claim 19 (depends on 16) The wireless device of claim 16, wherein the processor is further configured to control the RF transceiver to: receive second MCCH change information from the P-cell; and receive information changed via the MCCH based on the second MCCH change information, wherein the processor is further configured to make the RF transceiver available to receive the second MCCH change information when the wireless device is in a radio resource control idle (RRC_IDLE) state or an RRC_CONNECTED state, and wherein the second MCCH change information is received via a multicast broadcast single frequency network (MBSFN) subframe of the P-cell. ### Claim 20 (depends on 19) The wireless device of claim 19, wherein the first MCCH change information is received via a MBSFN subframe of the S-cell, wherein the second MCCH change information is received via a MBSFN subframe of the P-cell, wherein the MBSFN subframe of the P-cell is at least one of subframe 1, subframe 2, subframe 3, subframe 6, subframe 7 and subframe 8 in a frequency division duplex (FDD) frame, and wherein the MBSFN subframe of the S-cell is at least one of subframe 1, subframe 2, subframe 3, subframe 6, subframe 7 and subframe 8 in a FDD frame.