# US 2018/0027424 A1 · Methods of adapting receiver configuration for control channel reception based on drx status > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0027424 A1 - Document ID: US20180027424A1 - Status: Published application - Kind: A1 - Application number: 15/316,176 - Filed: 2016-04-13 - Published: 2018-01-25 - Earliest claimed: 2015-04-13 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Maomao CHEN; Muhammad KAZMI - Web page: https://patentgrep.com/patent/US20180027424A1 ## CPC - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04W 24/02: Arrangements for optimising operational condition - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method performed in a wireless device (300) of a cellular communication system is disclosed. The wireless device (300) has a first receiver configuration and a second receiver configuration and is capable of operating in DRX. The method comprises determining (110) a DRX configuration of the wireless device, wherein the DRX configuration indicates a time period during which the wireless device (300) should monitor a control channel. The method further comprises monitoring (120) the control channel during said time period using the first receiver configuration if the DRX configuration is a first DRX configuration or monitoring (130) the control channel during said time period using the second receiver configuration if the DRX configuration is a second DRX configuration. A method in a network node, a wireless device, a network node, computer program products, and computer-readable media are also disclosed. ## Claims ### Claim 1 A method, performed in a wireless device of a cellular communication system, wherein the wireless device has a first receiver configuration and a second receiver configuration and is capable of operating in discontinuous reception—DRX—, of monitoring a control channel of the cellular communication system, the method comprising: determining a DRX configuration of the wireless device, wherein the DRX configuration indicates a time period during which the wireless device should monitor the control channel; and monitoring the control channel during said time period using the first receiver configuration if the DRX configuration is a first DRX configuration; or monitoring the control channel during said time period using the second receiver configuration if the DRX configuration is a second DRX configuration. ### Claim 2 (depends on 1) The method according to claim 1, wherein the first receiver configuration provides an enhanced reception performance compared with the second receiver configuration. ### Claim 3 (depends on 1) The method according to claim 1, wherein the wireless device has a plurality of antenna ports and is configured to use a first number M of antenna ports in the first receiver configuration and a second number L, smaller than M, of antenna ports in the second receiver configuration. ### Claim 4 (depends on 1) The method according to claim 1, wherein the wireless device is configured to apply a certain interference-mitigation technique to a receiver of the wireless device in the first receiver configuration, and to not apply the certain interference-mitigation technique to said receiver in the second receiver configuration. ### Claim 5 (depends on 1) The method according to claim 1, wherein the wireless device is configured to: operate in a DRX state in the first DRX configuration; and operate in a non-DRX state in the second DRX configuration. ### Claim 6 (depends on 1) The method according to claim 1, wherein the wireless device is configured to: operate in a DRX state with a first DRX ON duration in the first DRX configuration; and operate in a DRX state with a second DRX ON duration in the second DRX configuration; wherein DRX ON duration is the time period during which the wireless device should monitor the control channel; and the first DRX ON duration is shorter than the second DRX ON duration. ### Claim 7 (depends on 1) The method according to claim 1, wherein the DRX configuration is the second DRX configuration if the wireless device operates in a DRX state with a DRX ON duration that exceeds a first threshold, and the DRX configuration is the first DRX configuration if the wireless device operates in a DRX state with a DRX ON duration that is less than or equal to the first threshold, wherein DRX ON duration is the time period during which the wireless device should monitor the control channel. ### Claim 8 (depends on 1) The method according to claim 1, wherein the wireless device is configured to: operate in a DRX state with a first DRX cycle in the first DRX configuration; and operate in a DRX state with a second DRX cycle in the second DRX configuration; wherein the first DRX cycle is longer than the second DRX cycle. ### Claim 9 (depends on 1) The method according to claim 1, wherein the DRX configuration is the first DRX configuration if the wireless device operates in a DRX state with a DRX cycle length that exceeds a second threshold, and the DRX configuration is the second DRX configuration if the wireless device operates in a DRX state with a DRX cycle length that is less than or equal to the second threshold. ### Claim 10 (depends on 1) The method according to claim 1, wherein the wireless device comprises a first timer and a second timer, and the method comprises: starting the first timer at the beginning of said time period and monitoring the control channel until the first timer expires using the first receiver configuration if the DRX configuration is the first DRX configuration; or starting the second timer at the beginning of said time period and monitoring the control channel until the second timer expires using the second receiver configuration if the DRX configuration is the second DRX configuration. ### Claim 11 A method, performed in a network node of a cellular communication system, wherein a wireless device of the cellular communication system is capable of operating in discontinuous reception—DRX—and wherein the network node has a first transmitter configuration and a second transmitter configuration, of transmitting signals to the wireless device, the method comprising: configuring a DRX configuration of the wireless device, wherein the DRX configuration indicates a time period during which the wireless device should monitor a control channel of the cellular communication system; and transmitting signals over the control channel to the wireless device during said time period using the first transmitter configuration if the DRX configuration is a first DRX configuration; or transmitting signals over the control channel to the wireless device during said time period using the second transmitter configuration if the DRX configuration is a second DRX configuration. ### Claim 12 (depends on 11) The method according to claim 11, wherein the second transmitter configuration provides an enhanced transmission performance compared with the first transmitter configuration. ### Claim 13 (depends on 11) The method according to claim 11, wherein the network node is configured to use a first transmission power level P1 in the first transmitter configuration and a second transmission power level P2, higher than P1, in the second transmitter configuration. ### Claim 14 (depends on 11) The method according to claim 11, wherein the network node is configured to use a first aggregation level in the first transmitter configuration and a second aggregation level, higher than the first aggregation level, in the second transmitter configuration. ### Claim 15 (depends on 11) The method according to claim 11, wherein the wireless device is configured to: operate in a DRX state in the first DRX configuration; and operate in a non-DRX state in the second DRX configuration. ### Claim 16 (depends on 11) The method according to claim 11, wherein the wireless device is configured to: operate in a DRX state with a first DRX ON duration in the first DRX configuration; and operate in a DRX state with a second DRX ON duration in the second DRX configuration; wherein DRX ON duration is the time period during which the wireless device should monitor the control channel; and the first DRX ON duration is shorter than the second DRX ON duration. ### Claim 17 (depends on 11) The method according to claim 11, wherein the DRX configuration is the second DRX configuration if the wireless device operates in a DRX state with a DRX ON duration that exceeds a first threshold, and the DRX configuration is the first DRX configuration if the wireless device operates in a DRX state with a DRX ON duration that is less than or equal to the first threshold, wherein DRX ON duration is the time period during which the wireless device should monitor the control channel. ### Claim 18 (depends on 11) The method according to claim 11, wherein the wireless device is configured to: operate in a DRX state with a first DRX cycle in the first DRX configuration; and operate in a DRX state with a second DRX cycle in the second DRX configuration; wherein the first DRX cycle is longer than the second DRX cycle. ### Claim 19 (depends on 11) The method according to claim 11, wherein the DRX configuration is the first DRX configuration if the wireless device operates in a DRX state with a DRX cycle length that exceeds a second threshold, and the DRX configuration is the second DRX configuration if the wireless device operates in a DRX state with a DRX cycle length that is less than or equal to the second threshold. ### Claim 20 (depends on 11) The method according to claim 11, further comprising transmitting the information about the first transmitter configuration and the second transmitter configuration to another network node. ### Claim 21 (depends on 11) A method performed in a cellular communication system, wherein the cellular communication system comprises a network node and a wireless device, the method comprising: performing, in the network node, the method according to claim 11; and performing, in the wireless device, a method performed in the wireless device of the cellular communication system, wherein the wireless device has a first receiver configuration and a second receiver configuration and is capable of operating in discontinuous reception—DRX—, of monitoring a control channel of the cellular communication system, the method in the wireless device comprising: determining a DRX configuration of the wireless device, wherein the DRX configuration indicates a time period during which the wireless device should monitor the control channel; and monitoring the control channel during said time period using the first receiver configuration if the DRX configuration is a first DRX configuration; or monitoring the control channel during said time period using the second receiver configuration if the DRX configuration is a second DRX configuration. ### Claim 22 (canceled) ### Claim 23 A nontransitory computer readable storage medium having stored thereon a computer program product comprising computer program code for executing a method when said computer program code is executed by a programmable control unit a wireless device, wherein the wireless device is of a cellular communication system, wherein the wireless device has a first receiver configuration and a second receiver configuration and is capable of operating in discontinuous reception—DRX—, of monitoring a control channel of the cellular communication system, the method comprising: determining a DRX configuration of the wireless device, wherein the DRX configuration indicates a time period during which the wireless device should monitor the control channel; and monitoring the control channel during said time period using the first receiver configuration if the DRX configuration is a first DRX configuration; or monitoring the control channel during said time period using the second receiver configuration if the DRX configuration is a second DRX configuration. ### Claim 24 (canceled) ### Claim 25 A nontransitory computer readable storage medium having stored thereon a computer program product comprising computer program code for executing a method when said computer program code is executed by a programmable control unit of a network node of a cellular communication system, wherein a wireless device of the cellular communication system is capable of operating in discontinuous reception—DRX—and wherein the network node has a first transmitter configuration and a second transmitter configuration, of transmitting signals to the wireless device, the method comprising: configuring a DRX configuration of the wireless device, wherein the DRX configuration indicates a time period during which the wireless device should monitor a control channel of the cellular communication system; and transmitting signals over the control channel to the wireless device during said time period using the first transmitter configuration if the DRX configuration is a first DRX configuration; or transmitting signals over the control channel to the wireless device during said time period using the second transmitter configuration if the DRX configuration is a second DRX configuration. ### Claim 26 A wireless device for a cellular communication system, wherein the wireless device is capable of capable of operating in discontinuous reception—DRX—, comprising: a receiver unit having a first receiver configuration and a second receiver configuration; a control unit operatively connected to the receiver unit; wherein the control unit is adapted to: determine a DRX configuration of the wireless device, wherein the DRX configuration indicates a time period during which the wireless device should monitor a control channel; and control the receiver unit to: monitor the control channel during said time period using the first receiver configuration if the DRX configuration is a first DRX configuration; or monitor the control channel during said time period using the second receiver configuration if the DRX configuration is a second DRX configuration. ### Claim 27 (depends on 26) The wireless device according to claim 26, wherein the first receiver configuration provides an enhanced reception performance compared with the second receiver configuration. ### Claim 28 (depends on 26) The wireless device according to claim 26, wherein the receiver unit has a plurality of antenna ports and is configured to use a first number M of antenna ports in the first receiver configuration and a second number L, smaller than M, of antenna ports in the second receiver configuration. ### Claim 29 (depends on 26) The wireless device according to claim 26, wherein the receiver unit is configured to apply a certain interference-mitigation technique to a receiver of the wireless device in the first receiver configuration, and to not apply the certain interference-mitigation technique to said receiver in the second receiver configuration. ### Claim 30 (depends on 26) The wireless device according to claim 26, wherein the wireless device is configured to: operate in a DRX state in the first DRX configuration; and operate in a non-DRX state in the second DRX configuration. ### Claim 31 (depends on 26) The wireless device according to claim 26, wherein the wireless device is configured to: operate in a DRX state with a first DRX ON duration in the first DRX configuration; and operate in a DRX state with a second DRX ON duration in the second DRX configuration; wherein DRX ON duration is the time period during which the wireless device should monitor the control channel; and the first DRX ON duration is shorter than the second DRX ON duration. ### Claim 32 (depends on 26) The wireless device according to claim 26, wherein the DRX configuration is the second DRX configuration if the wireless device operates in a DRX state with a DRX ON duration that exceeds a first threshold, and the DRX configuration is the first DRX configuration if the wireless device operates in a DRX state with a DRX ON duration that is less than or equal to the first threshold, wherein DRX ON duration is the time period during which the wireless device should monitor the control channel. ### Claim 33 (depends on 26) The wireless device according to claim 26, wherein the wireless device is configured to: operate in a DRX state with a first DRX cycle in the first DRX configuration; and operate in a DRX state with a second DRX cycle in the second DRX configuration; wherein the first DRX cycle is longer than the second DRX cycle. ### Claim 34 (depends on 26) The wireless device according to claim 26, wherein the DRX configuration is the first DRX configuration if the wireless device operates in a DRX state with a DRX cycle length that exceeds a second threshold, and the DRX configuration is the second DRX configuration if the wireless device operates in a DRX state with a DRX cycle length that is less than or equal to the second threshold. ### Claim 35 (depends on 26) The wireless device according to claim 26, wherein the wireless device comprises a first timer and a second timer, and the control unit is configured to: start the first timer at the beginning of said time period and control the receiver unit to monitor the control channel until the first timer expires using the first receiver configuration if the DRX configuration is the first DRX configuration; or start the second timer at the beginning of said time period and control the receiver unit to monitor the control channel until the second timer expires using the second receiver configuration if the DRX configuration is the second DRX configuration. ### Claim 36 A network node, configured to operate within a cellular communication system wherein a wireless device of the cellular communication system is capable of operating in discontinuous reception—DRX—, comprising: a transmitter unit having a first transmitter configuration and a second transmitter configuration; and a control unit operatively connected to the transmitter unit; wherein the control unit is adapted to configure a DRX configuration of the wireless device, wherein the DRX configuration indicates a time period during which the wireless device should monitor a control channel of the cellular communication system; and control the transmitter unit to: transmit signals over the control channel to the wireless device during said time period using the first transmitter configuration if the DRX configuration is a first DRX configuration; or transmit signals over the control channel to the wireless device during said time period using the second transmitter configuration if the DRX configuration is a second DRX configuration. ### Claim 37 (depends on 36) The network node according to claim 36, wherein the second transmitter configuration provides an enhanced transmission performance compared with the first transmitter configuration. ### Claim 38 (depends on 36) The network node according to claim 36, wherein the network node is configured to use a first transmission power level P1 in the first transmitter configuration and a second transmission power level P2, higher than P1, in the second transmitter configuration. ### Claim 39 (depends on 36) The network node according to claim 36, wherein the transmitter unit is configured to use a first aggregation level in the first transmitter configuration and a second aggregation level, higher than the first aggregation level, in the second transmitter configuration. ### Claim 40 (depends on 36) The network node according to claim 36, wherein the wireless device is configured to: operate in a DRX state in the first DRX configuration; and operate in a non-DRX state in the second DRX configuration. ### Claim 41 (depends on 36) The network node according to claim 36, wherein the wireless device is configured to: operate in a DRX state with a first DRX ON duration in the first DRX configuration; and operate in a DRX state with a second DRX ON duration in the second DRX configuration; wherein DRX ON duration is the time period during which the wireless device should monitor the control channel; and the first DRX ON duration is shorter than the second DRX ON duration. ### Claim 42 (depends on 36) The network node according to claim 36, wherein the DRX configuration is the second DRX configuration if the wireless device operates in a DRX state with a DRX ON duration that exceeds a first threshold, and the DRX configuration is the first DRX configuration if the wireless device operates in a DRX state with a DRX ON duration that is less than or equal to the first threshold, wherein DRX ON duration is the time period during which the wireless device should monitor the control channel. ### Claim 43 (depends on 36) The network node according to claim 36, wherein the wireless device is configured to: operate in a DRX state with a first DRX cycle in the first DRX configuration; and operate in a DRX state with a second DRX cycle in the second DRX configuration; wherein the first DRX cycle is longer than the second DRX cycle. ### Claim 44 (depends on 36) The network node according to claim 36, wherein the DRX configuration is the first DRX configuration if the wireless device operates in a DRX state with a DRX cycle length that exceeds a second threshold, and the DRX configuration is the second DRX configuration if the wireless device operates in a DRX state with a DRX cycle length that is less than or equal to the second threshold. ### Claim 45 (depends on 36) The network node according to claim 36, wherein the network node is configured to transmit information about the first transmitter configuration and the second transmitter configuration to another network node. ### Claim 46 (depends on 36) A cellular communication system comprising: a network node according to claim 36; and a wireless device for the cellular communication system, wherein the wireless device is capable of capable of operating in discontinuous reception—DRX—, comprising: a receiver unit having a first receiver configuration and a second receiver configuration; a control unit operatively connected to the receiver unit; wherein the control unit is adapted to: determine a DRX configuration of the wireless device, wherein the DRX configuration indicates a time period during which the wireless device should monitor the control channel; and control the receiver unit to: monitor the control channel during said time period using the first receiver configuration if the DRX configuration is a first DRX configuration; or monitor the control channel during said time period using the second receiver configuration if the DRX configuration is a second DRX configuration.