# US 9,521,664 B2 · EPDCCH resource and quasi-co-location management in LTE > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,521,664 B2 - Document ID: US9521664B2 - Status: Granted - Kind: B2 - Application number: 14/021,980 - Filed: 2013-09-09 - Published: 2014-05-08 - Granted: 2016-12-13 - Earliest claimed: 2012-11-02 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Wanshi Chen; Stefan Geirhofer; Peter Gaal; Hao Xu; Tao Luo - Web page: https://patentgrep.com/patent/US9521664B2 ## CPC - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04B 7/024: Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems - H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]} - H04L 1/0038: {Blind format detection (for detection of modulation format H04L27/0012)} - H04L 1/0067: {Rate matching (H04L1/0013 and H04L1/08 take precedence)} - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04L 5/0035: {Resource allocation in a cooperative multipoint environment} - 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 5/001: {the frequencies being arranged in component carriers} - H04L 25/0204: {of multiple channels} - H04W 72/044: based on the type of the allocated resource - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A method, an apparatus, and a computer program product for wireless communication are provided. In an aspect, the apparatus may receive a set of configurations for an EPDCCH that are tied to a set of configurations received for a PDSCH. The apparatus may then receive and process the EPDCCH based on at least one configuration from the set of configurations for the EPDCCH. In another aspect, the apparatus may determine at least a first and second resource set configured for a control channel and may determine a common set of aggregation levels for the first and second resource sets. The apparatus may further determine first rate-matching parameters for the first resource set and second rate-matching parameters for the second resource set, and may process the control channel using the common set of aggregation levels and the first and second rate-matching parameters. ## Claims ### Claim 1 A method of wireless communication, comprising: receiving a first set of configurations for a physical downlink shared channel (PDSCH), each configuration in the first set of configurations defining at least one of a starting symbol, rate-matching information, or a quasi-co-location (QCL) indication; receiving a second set of configurations for an enhanced physical downlink control channel (EPDCCH), the second set of configurations corresponding to a subset from among the first set of configurations and the second set of configurations being indicated by reference to a subset of configurations from among the first set of configurations, wherein each configuration in the second set of configurations corresponds to at least one of: a quasi-co-location (QCL) indication parameter for the EPDCCH, a starting symbol parameter for the EPDCCH, or a rate matching parameter for the EPDCCH, wherein for each of the second set of configurations, the QCL indication parameter for the EPDCCH, the starting symbol parameter for the EPDCCH, and the rate matching parameter for the EPDCCH is based on a PDSCH configuration from the first set of configurations; receiving the EPDCCH; and processing the EPDCCH based on at least one configuration from the second set of configurations. ### Claim 2 (depends on 1) The method of claim 1, wherein: the second set of configurations includes a first EPDCCH configuration and a second EPDCCH configuration, the received EPDCCH is received on a first resource set and a second resource set, the first EPDCCH configuration is defined for processing the EPDCCH on the first resource set, and the second EPDCCH configuration is defined for processing the EPDCCH on the second resource set. ### Claim 3 (depends on 2) The method of claim 2, wherein the first set of configurations includes four PDSCH configurations and the second set of configurations correspond to includes two EPDCCH configurations that are a subset from among the four PDSCH configurations. ### Claim 4 (depends on 1) The method of claim 1, wherein the second set of configurations is selected from the first set of configurations based on a radio resource control (RRC) configuration. ### Claim 5 (depends on 4) The method of claim 4, wherein receiving the second set of configurations includes receiving an indicator identifying a QCL configuration parameter, and wherein the second set of configurations is selected from the first set of configurations using the indicator identifying the QCL configuration. ### Claim 6 (depends on 1) The method of claim 1, wherein the PDSCH is implemented in a coordinated multipoint system. ### Claim 7 (depends on 1) The method of claim 1, wherein the second set of configurations corresponds to the QCL indication parameter for the EPDCCH. ### Claim 8 (depends on 7) The method of claim 7, wherein the QCL indication parameter comprises a QCL-Channel State Information (CSI)-Reference Signal (RS)-Index for the EPDCCH. ### Claim 9 (depends on 1) The method of claim 1, wherein the second set of configurations corresponds to the starting symbol parameter for the EPDCCH. ### Claim 10 (depends on 1) The method of claim 1, wherein the second set of configurations corresponds to the rate matching parameter for the EPDCCH. ### Claim 11 (depends on 1) The method of claim 1, wherein each configuration in the second set of configurations corresponds to the QCL indication parameter for the EPDCCH, the starting symbol parameter for the EPDCCH, and the rate matching parameter for the EPDCCH. ### Claim 12 (depends on 1) The method of claim 1, wherein processing the EPDCCH based on at least one configuration from the second set of configurations includes determining an EPDCCH resource element (RE) mapping and an EPDCCH antenna port quasi co-location based on the at least one configuration from the second set of configurations. ### Claim 13 (depends on 1) The method of claim 1, wherein the first set of configurations includes a plurality of PDSCH configurations and the second set of configurations includes one or more EPDCCH configurations that are a subset from among the plurality of PDSCH configurations. ### Claim 14 A method of wireless communication, comprising: configuring a first set of configurations for a physical downlink shared channel (PDSCH), each configuration in the first set of configurations defining at least one of a starting symbol, rate-matching information, or a quasi-co-location (QCL) indication; configuring a second set of configurations for an enhanced physical downlink control channel (EPDCCH), the second set of configurations corresponding to a subset from among the first set of configurations and the second set of configurations being indicated by reference to a subset of configurations from among the first set of configurations, wherein each configuration in the second set of configurations corresponds to at least one of: a quasi-co-location (QCL) indication parameter for the EPDCCH, a starting symbol parameter for the EPDCCH, or a rate matching parameter for the EPDCCH, wherein for each of the second set of configurations, the QCL indication parameter for the EPDCCH, the starting symbol parameter for the EPDCCH, and the rate matching parameter for the EPDCCH is based on a PDSCH configuration from the first set of configurations; transmitting the first set of configurations for the PDSCH and the second set of configurations for the EPDCCH; and transmitting the EPDCCH. ### Claim 15 (depends on 14) The method of claim 14, wherein: the second set of configurations includes a first EPDCCH configuration and a second EPDCCH configuration, the transmitted EPDCCH is transmitted on a first resource set and a second resource set, the first EPDCCH configuration is defined for processing the EPDCCH on the first resource set, and the second EPDCCH configuration is defined for processing the EPDCCH on the second resource set. ### Claim 16 (depends on 15) The method of claim 15, wherein the first set of configurations includes four PDSCH configurations and the second set of configurations includes two EPDCCH configurations that are a subset from among the four PDSCH configurations. ### Claim 17 (depends on 14) The method of claim 14, wherein the second set of configurations is selected from the first of configurations based on a radio resource control (RRC) configuration. ### Claim 18 (depends on 17) The method of claim 17, wherein the second set of configurations includes an indicator identifying a quasi-co-location configuration. ### Claim 19 (depends on 14) The method of claim 14, wherein the PDSCH is implemented in a coordinated multipoint system. ### Claim 20 (depends on 14) The method of claim 14, wherein the second set of configurations corresponds to the QCL indication parameter for the EPDCCH. ### Claim 21 (depends on 20) The method of claim 20, wherein the QCL indication parameter comprises a QCL-Channel State Information (CSI)-Reference Signal (RS)-Index for the EPDCCH. ### Claim 22 (depends on 14) The method of claim 14, wherein the second set of configurations corresponds to the starting symbol parameter for the EPDCCH. ### Claim 23 (depends on 14) The method of claim 14, wherein the second set of configurations corresponds to the rate matching parameter for the EPDCCH. ### Claim 24 (depends on 14) The method of claim 14, wherein the second set of configurations corresponds to the QCL indication parameter for the EPDCCH, the starting symbol parameter for the EPDCCH, and the rate matching parameter for the EPDCCH. ### Claim 25 (depends on 14) The method of claim 14, wherein the first set of configurations includes a plurality of PDSCH configurations and the second set of configurations includes one or more EPDCCH configurations that are a subset from among the plurality of PDSCH configurations. ### Claim 26 An apparatus of wireless communication, comprising: means for receiving a first set of configurations for a physical downlink shared channel (PDSCH), each configuration in the first set of configurations defining at least one of a starting symbol, rate-matching information, or a quasi-co-location (QCL) indication; means for receiving a second set of configurations for an enhanced physical downlink control channel (EPDCCH), the second set of configurations corresponding to a subset from among the first set of configurations and the second set of configurations being indicated by reference to a subset of configurations from among the first set of configurations, wherein each configuration in the second set of configurations corresponds to at least one of: a quasi-co-location (QCL) indication parameter for the EPDCCH, a starting symbol parameter for the EPDCCH, or a rate matching parameter for the EPDCCH, wherein for each of the second set of configurations, the QCL indication parameter for the EPDCCH, the starting symbol parameter for the EPDCCH, and the rate matching parameter for the EPDCCH is based on a PDSCH configuration from the first set of configurations; means for receiving the EPDCCH; and means for processing the EPDCCH based on at least one configuration from the second set of configurations. ### Claim 27 (depends on 26) The apparatus of claim 26, wherein: the second set of configurations includes a first EPDCCH configuration and a second EPDCCH configuration, the received EPDCCH is received on a first resource set and a second resource set, the first EPDCCH configuration is defined for processing the EPDCCH on the first resource set, and the second EPDCCH configuration is defined for processing the EPDCCH on the second resource set. ### Claim 28 (depends on 27) The apparatus of claim 27, wherein the first set of configurations includes four PDSCH configurations and the second set of configurations includes two EPDCCH configurations that are a subset from among the four PDSCH configurations. ### Claim 29 (depends on 26) The apparatus of claim 26, wherein the second set of configurations is selected from the first set of configurations based on a radio resource control (RRC) configuration. ### Claim 30 (depends on 26) The apparatus of claim 26, wherein the PDSCH is implemented in a coordinated multipoint system. ### Claim 31 (depends on 26) The apparatus of claim 26, wherein the second set of configurations corresponds to the QCL indication parameter for the EPDCCH. ### Claim 32 (depends on 26) The apparatus of claim 26, wherein the second set of configurations corresponds to the QCL indication parameter for the EPDCCH, the starting symbol parameter for the EPDCCH, and the rate matching parameter for the EPDCCH. ### Claim 33 (depends on 26) The apparatus of claim 26, wherein the means for processing the EPDCCH determines an EPDCCH resource element (RE) mapping and an EPDCCH antenna port quasi co-location based on the at least one configuration from the second set of configurations. ### Claim 34 An apparatus for wireless communication, comprising: means for configuring a first set of configurations for a physical downlink shared channel (PDSCH), each configuration in the first set of configurations defining at least one of a starting symbol, rate-matching information, or a quasi-co-location (QCL) indication; means for configuring a second set of configurations for an enhanced physical downlink control channel (EPDCCH), the second set of configurations corresponding to a subset from among the first set of configurations and the second set of configurations being indicated by reference to a subset of configurations from among the first set of configurations, wherein each configuration in the second set of configurations corresponds to at least one of: a quasi-co-location (QCL) indication parameter for the EPDCCH, a starting symbol parameter for the EPDCCH, or a rate matching parameter for the EPDCCH, wherein for each of the second set of configurations, the QCL indication parameter for the EPDCCH, the starting symbol parameter for the EPDCCH, and the rate matching parameter for the EPDCCH is based on a PDSCH configuration from the first set of configurations; means for transmitting the first set of configurations for the PDSCH and the second set of configurations for the EPDCCH; and means for transmitting the EPDCCH. ### Claim 35 (depends on 34) The apparatus of claim 34, wherein: the second set of configurations includes a first EPDCCH configuration and a second EPDCCH configuration, the transmitted EPDCCH is transmitted on a first resource set and a second resource set, the first EPDCCH configuration is defined for processing the EPDCCH on the first resource set, and the second EPDCCH configuration is defined for processing the EPDCCH on the second resource set. ### Claim 36 (depends on 35) The apparatus of claim 35, wherein the first set of configurations includes four PDSCH configurations and the second set of configurations includes two EPDCCH configurations that are a subset from among the four PDSCH configurations. ### Claim 37 (depends on 34) The apparatus of claim 34, wherein the second set of configurations is selected from the first set of configurations based on a radio resource control (RRC) configuration. ### Claim 38 (depends on 34) The apparatus of claim 34, wherein the PDSCH is implemented in a coordinated multipoint system. ### Claim 39 (depends on 34) The apparatus of claim 34, wherein the second set of configurations corresponds to the QCL indication parameter for the EPDCCH. ### Claim 40 (depends on 34) The apparatus of claim 34, wherein the second set of configurations corresponds to the QCL indication parameter for the EPDCCH, the starting symbol parameter for the EPDCCH, and the rate matching parameter for the EPDCCH. ### Claim 41 An apparatus for wireless communication, comprising: a memory; and at least one processor coupled to the memory and configured to: receive a first set of configurations for a physical downlink shared channel (PDSCH), each configuration in the first set of configurations defining at least one of a starting symbol, rate-matching information, or a quasi-co-location (QCL) indication; receive a second set of configurations for an enhanced physical downlink control channel (EPDCCH), the second set of configurations corresponding to a subset from among the first set of configurations and the second set of configurations being indicated by reference to a subset of configurations from among the first set of configurations, wherein each configuration in the second set of configurations corresponds to at least one of: a quasi-co-location (QCL) indication parameter for the EPDCCH, a starting symbol parameter for the EPDCCH, or a rate matching parameter for the EPDCCH, wherein for each of the second set of configurations, the QCL indication parameter for the EPDCCH, the starting symbol parameter for the EPDCCH, and the rate matching parameter for the EPDCCH is based on a PDSCH configuration from the first set of configurations; receive the EPDCCH; and process the EPDCCH based on at least one configuration from the second set of configurations. ### Claim 42 (depends on 41) The apparatus of claim 41, wherein: the second set of configurations includes a first EPDCCH configuration and a second EPDCCH configuration, the received EPDCCH is received on a first resource set and a second resource set, the first EPDCCH configuration is defined for processing the EPDCCH on the first resource set, and the second EPDCCH configuration is defined for processing the EPDCCH on the second resource set. ### Claim 43 (depends on 42) The apparatus of claim 42, wherein the first set of configurations includes four PDSCH configurations and the second set of configurations includes two EPDCCH configurations that are a subset from among the four PDSCH configurations. ### Claim 44 (depends on 41) The apparatus of claim 41, wherein the second set of configurations is selected from the first set of configurations based on a radio resource control (RRC) configuration. ### Claim 45 (depends on 41) The apparatus of claim 41, wherein the PDSCH is implemented in a coordinated multipoint system. ### Claim 46 (depends on 41) The apparatus of claim 41, wherein the second set of configurations corresponds to the QCL indication parameter for the EPDCCH. ### Claim 47 (depends on 41) The apparatus of claim 41, wherein the second set of configurations corresponds to the QCL indication parameter for the EPDCCH, the starting symbol parameter for the EPDCCH, and the rate matching parameter for the EPDCCH. ### Claim 48 (depends on 41) The apparatus of claim 41, wherein processing the EPDCCH based on the at least one configuration from the second set of configuration includes determining an EPDCCH resource element (RE) mapping and an EPDCCH antenna port quasi co-location based on the at least one configuration from the second set of configurations. ### Claim 49 An apparatus for wireless communication, comprising: a memory; and at least one processor coupled to the memory and configured to: configure a first set of configurations for a physical downlink shared channel (PDSCH), each configuration in the first set of configurations defining at least one of a starting symbol, rate-matching information, or a quasi-co-location (QCL) indication; configure a second set of configurations for an enhanced physical downlink control channel (EPDCCH), the second set of configurations corresponding to a subset from among the first set of configurations and the second set of configurations being indicated by reference to a subset of configurations from among the first set of configurations, wherein each configuration in the second set of configurations corresponds to at least one of: a quasi-co-location (QCL) indication parameter for the EPDCCH, a starting symbol parameter for the EPDCCH, or a rate matching parameter for the EPDCCH, wherein for each of the second set of configurations, the QCL indication parameter for the EPDCCH, the starting symbol parameter for the EPDCCH, and the rate matching parameter for the EPDCCH is based on a PDSCH configuration from the first set of configurations; transmit the first set of configurations for the PDSCH and the second set of configurations for the EPDCCH; and transmit the EPDCCH. ### Claim 50 (depends on 49) The apparatus of claim 49, wherein: the second set of configurations includes a first EPDCCH configuration and a second EPDCCH configuration, the transmitted EPDCCH is transmitted on a first resource set and a second resource set, the first EPDCCH configuration is defined for processing the EPDCCH on the first resource set, and the second EPDCCH configuration is defined for processing the EPDCCH on the second resource set. ### Claim 51 (depends on 50) The apparatus of claim 50, wherein the first set of configurations includes four PDSCH configurations and the second set of configurations includes two EPDCCH configurations that are a subset from among the four PDSCH configurations. ### Claim 52 (depends on 49) The apparatus of claim 49, wherein the second set of configurations is selected from the first of configurations based on a radio resource control (RRC) configuration. ### Claim 53 (depends on 49) The apparatus of claim 49, wherein the PDSCH is implemented in a coordinated multipoint system. ### Claim 54 (depends on 49) The apparatus of claim 49, wherein the second set of configurations corresponds to the QCL indication parameter for the EPDCCH. ### Claim 55 (depends on 49) The apparatus of claim 49, wherein the second set of configurations corresponds to the QCL indication parameter for the EPDCCH, the starting symbol parameter for the EPDCCH, and the rate matching parameter for the EPDCCH. ### Claim 56 A non-transitory computer-readable medium storing computer executable code for wireless communication, comprising code for: receiving a first set of configurations for a physical downlink shared channel (PDSCH), each configuration in the first set of configurations defining at least one of a starting symbol, rate-matching information, or a quasi-co-location (QCL) indication; receiving a second set of configurations for an enhanced physical downlink control channel (EPDCCH), the second set of configurations corresponding to a subset from among the first set of configurations and the second set of configurations being indicated by reference to a subset of configurations from among the first set of configurations, wherein each configuration in the second set of configurations corresponds to at least one of: a quasi-co-location (QCL) indication parameter for the EPDCCH, a starting symbol parameter for the EPDCCH, or a rate matching parameter for the EPDCCH, wherein for each of the second set of configurations, the QCL indication parameter for the EPDCCH, the starting symbol parameter for the EPDCCH, and the rate matching parameter for the EPDCCH is based on a PDSCH configuration from the first set of configurations; receiving the EPDCCH; and processing the EPDCCH based on at least one configuration from the second set of configurations. ### Claim 57 (depends on 56) The computer-readable medium of claim 56, wherein: the second set of configurations includes a first EPDCCH configuration and a second EPDCCH configuration, the received EPDCCH is received on a first resource set and a second resource set, the first EPDCCH configuration is defined for processing the EPDCCH on the first resource set, and the second EPDCCH configuration is defined for processing the EPDCCH on the second resource set. ### Claim 58 (depends on 57) The computer-readable medium of claim 57, wherein the first set of configurations includes four PDSCH configurations and the second set of configurations includes two EPDCCH configurations that are a subset from among the four PDSCH configurations. ### Claim 59 (depends on 56) The computer-readable medium of claim 56, wherein the second set of configurations is selected from the first set of configurations based on a radio resource control (RRC) configuration, and wherein the PDSCH is implemented in a coordinated multipoint system. ### Claim 60 A non-transitory computer-readable medium storing computer executable code for wireless communication, comprising code for: configuring a first set of configurations for a physical downlink shared channel (PDSCH), each configuration in the first set of configurations defining at least one of a starting symbol, rate-matching information, or a quasi-co-location (QCL) indication; configuring a second set of configurations for an enhanced physical downlink control channel (EPDCCH), the second set of configurations corresponding to a subset from among the first set of configurations and the second set of configurations being indicated by reference to a subset of configurations from among the first set of configurations, wherein each configuration in the second set of configurations corresponds to at least one of: a quasi-co-location (QCL) indication parameter for the EPDCCH, a starting symbol parameter for the EPDCCH, or a rate matching parameter for the EPDCCH, wherein for each of the second set of configurations, the QCL indication parameter for the EPDCCH, the starting symbol parameter for the EPDCCH, and the rate matching parameter for the EPDCCH is based on a PDSCH configuration from the first set of configurations; transmitting the first set of configurations for the PDSCH and the second set of configurations for the EPDCCH; and transmitting the EPDCCH. ### Claim 61 (depends on 60) The computer-readable medium of claim 60, wherein: the second set of configurations includes a first EPDCCH configuration and a second EPDCCH configuration, the transmitted EPDCCH is transmitted on a first resource set and a second resource set, the first EPDCCH configuration is defined for processing the EPDCCH on the first resource set, and the second EPDCCH configuration is defined for processing the EPDCCH on the second resource set. ### Claim 62 (depends on 61) The computer-readable medium of claim 61, wherein the first set of configurations includes four PDSCH configurations and the second set of configurations includes two EPDCCH configurations that are a subset from among the four PDSCH configurations. ### Claim 63 (depends on 60) The computer-readable medium of claim 60, wherein the second set of configurations is selected from the first set of configurations based on a radio resource control (RRC) configuration. ### Claim 64 (depends on 60) The computer-readable medium of claim 60, wherein the PDSCH is implemented in a coordinated multipoint system.