# US 9,882,662 B2 · Systems and methods for license assisted access > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,882,662 B2 - Document ID: US9882662B2 - Status: Granted - Kind: B2 - Application number: 14/936,644 - Filed: 2015-11-09 - Published: 2016-05-12 - Granted: 2018-01-30 - Earliest claimed: 2014-11-11 - Assignees: Sharp Kabushiki Kaisha - Applicants: Sharp Laboratories of America, Inc. - Inventors: Toshizo Nogami; Zhanping Yin - Web page: https://patentgrep.com/patent/US9882662B2 ## CPC - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 27/0006: {Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio (for spectrum sharing between different networks H04W16/14)} - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 72/30: Resource management for broadcast services - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - 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 A user equipment (UE) is described. The UE includes a higher layer processor configured to receive a radio resource control (RRC) message to specify subframes for a channel state information-reference signal (CSI-RS). The UE also includes a control channel receiver configured to monitor a first control channel and a second control channel in a subframe. The first control channel indicates whether the CSI-RS in the subframe is available for CSI measurement. The second control channel is a control channel of which detection indicates a transmission of a shared channel in the subframe. The UE further includes a shared channel receiver configured to receive the shared channel when the second control channel is detected. ## Claims ### Claim 1 A user equipment (UE), comprising: a higher layer processor configured to receive a radio resource control (RRC) message to specify subframes for a channel state information-reference signal (CSI-RS), wherein the higher layer processor is further configured to receive a RRC message to configure a first serving cell as a scheduling cell for a second serving cell, the second serving cell is a serving cell on which a shared channel is received; a control channel receiver configured to monitor a first control channel and a second control channel in a subframe, the first control channel indicating whether the CSI-RS in the subframe is available for CSI measurement, the second control channel being a control channel of which detection indicates a transmission of the shared channel in the subframe, wherein the control channel receiver is further configured, based upon a configuration of the first serving cell, to monitor the first control channel on the second serving cell and to monitor the second control channel on the first serving cell; and a shared channel receiver configured to receive the shared channel when the second control channel is detected. ### Claim 2 (depends on 1) The UE of claim 1, wherein the control channel receiver is configured, if a cross carrier scheduling is not configured for a serving cell on which the shared channel is received, to monitor the first control channel and the second control channel on the serving cell. ### Claim 3 (depends on 1) The UE of claim 1, wherein the first control channel further indicates the number of remaining consecutive subframes in a burst in which the subframe is included. ### Claim 4 An evolved node B (eNB), comprising: a higher layer processor configured to transmit a radio resource control (RRC) message to specify subframes for a channel state information-reference signal (CSI-RS), wherein the higher layer processor is further configured to transmit a RRC message to specify a first serving cell as a scheduling cell for a second serving cell, the second serving cell is a serving cell on which a shared channel is transmitted; a control channel transmitter configured to transmit a first control channel and a second control channel in a subframe, the first control channel indicating whether the CSI-RS in the subframe is available for CSI measurement, the second control channel being a control channel of which detection indicates a transmission of the shared channel in the subframe, wherein the control channel transmitter is further configured, based upon a configuration of the first serving cell, to transmit the first control channel on the second serving cell and to transmit the second control channel on the first serving cell; and a shared channel transmitter configured to transmit the shared channel when the second control channel is transmitted. ### Claim 5 (depends on 4) The eNB of claim 4, wherein the control channel transmitter is configured, if a cross carrier scheduling is not configured for a serving cell on which the shared channel is transmitted, to transmit the first control channel and the second control channel on the serving cell. ### Claim 6 (depends on 4) The eNB of claim 4, wherein the first control channel further indicates the number of remaining consecutive subframes in a burst in which the subframe is included. ### Claim 7 A method in a user equipment (UE), comprising: receiving a radio resource control (RRC) message to specify subframes for a channel state information-reference signal (CSI-RS); receiving a RRC message to configure a first serving cell as a scheduling cell for a second serving cell, the second serving cell is a serving cell on which a shared channel is received; monitoring a first control channel and a second control channel in a subframe, the first control channel indicating whether the CSI-RS in the subframe is available for CSI measurement, the second control channel being a control channel of which detection indicates a transmission of the shared channel in the subframe; monitoring, based upon a configuration of the first serving cell, the first control channel on the second serving cell and to monitor the second control channel on the first serving cell; and receiving the shared channel when the second control channel is detected. ### Claim 8 A method in an evolved node B (eNB), comprising: transmitting a radio resource control (RRC) message to specify subframes for a channel state information-reference signal (CSI-RS); transmitting a RRC message to specify a first serving cell as a scheduling cell for a second serving cell, the second serving cell is a serving cell on which a shared channel is transmitted transmitting a first control channel and a second control channel in a subframe, the first control channel indicating whether the CSI-RS in the subframe is available for CSI measurement, the second control channel being a control channel of which detection indicates a transmission of the shared channel in the subframe; transmitting, based upon a configuration of the first serving cell, the first control channel on the second serving cell and to transmit the second control channel on the first serving cell; and transmitting the shared channel when the second control channel is transmitted.