# US 2016/0262137 A1 · Methods and Nodes Relating to System Information Acquisition During Flexible Subframe Operation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0262137 A1 - Document ID: US20160262137A1 - Status: Published application - Kind: A1 - Application number: 14/427,498 - Filed: 2015-01-29 - Published: 2016-09-08 - Earliest claimed: 2014-01-31 - Assignees: Telefonaktiebolaget L M Ericsson (publ) - Applicants: Telefonaktiebolaget L M Ericsson (Publ) - Inventors: Ali Behravan; Muhammad Kazmi; Iana Siomina - Web page: https://patentgrep.com/patent/US20160262137A1 ## CPC - H04W 72/044: based on the type of the allocated resource - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04W 36/0088: {Scheduling hand-off measurements} - H04W 48/08: Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00) - H04W 72/1263: Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - 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 The disclosure relates to a method performed in a wireless device located in a first cell operated by a network node of a wireless communication system. The method comprises acquiring (510) system information of a second cell using at least one autonomous gap during a time period. The wireless device is configured with a flexible subframe allocation scheme in the first cell during at least a part of the time period. The method further comprises obtaining (520) a value Nmin corresponding to a minimum number of uplink feedback signals, where the value Nmin is associated with the flexible subframe allocation scheme. The method also comprises transmitting (530) at least the minimum number Nmin of uplink feedback signals in response to downlink data during the time period. The disclosure also relates to a method in the network node and to the wireless device and the network node. ## Claims ### Claim at position 1 1-45. (canceled) ### Claim 46 A method performed in a wireless device located in a first cell operated by a network node of a wireless communication system, the method comprising: acquiring system information of a second cell using at least one autonomous gap during a time period, wherein the wireless device is configured with a flexible subframe allocation scheme in the first cell during at least a part of the time period; obtaining a value Nmin corresponding to a minimum number of uplink feedback signals, where the value Nmin is associated with the flexible subframe allocation scheme; and transmitting at least the minimum number Nmin of uplink feedback signals in response to downlink data during the time period. ### Claim 47 (depends on 46) The method according to claim 46, further comprising: receiving a request from the network node to report the system information of the second cell, wherein the system information is acquired in response to the request. ### Claim 48 (depends on 46) The method according to claim 46, further comprising: transmitting the acquired system information to the network node. ### Claim 49 (depends on 46) The method according to claim 46, wherein the system information comprises information uniquely identifying the second cell. ### Claim 50 (depends on 46) The method according to claim 46, wherein the uplink feedback signals are transmitted in the first cell in response to downlink data received from the network node in the first cell. ### Claim 51 (depends on 46) The method according to claim 46, wherein obtaining the value Nmin comprises one of: receiving information from the network node comprising the value Nmin; retrieving the value Nmin stored in the wireless device; and deriving the value Nmin based on a pre-defined rule, expression or function. ### Claim 52 (depends on 46) The method according to claim 46, wherein the wireless device is configured with the flexible subframe allocation scheme, based on configuration information received from the network node. ### Claim 53 (depends on 46) The method according to claim 46, wherein the first cell is one of the following: a serving cell, a PCell in multi-carrier operation, or a SCell in multi-carrier operation. ### Claim 54 (depends on 46) The method according to claim 46, wherein the flexible subframe allocation scheme is a dynamic Time Division Duplex (TDD) or a Half Duplex Frequency Division Duplex (HD-FDD) subframe allocation scheme. ### Claim 55 (depends on 46) The method according to claim 46, wherein the uplink feedback signals comprise acknowledgement and non-acknowledgement signals as part of hybrid automatic retransmission request feedback. ### Claim 56 A method performed in a network node of a wireless communication system operating a first cell, wherein a wireless device is served by the first cell, the method comprising: transmitting configuration information to the wireless device, configuring the wireless device to operate with a flexible subframe allocation scheme in the first cell during at least part of a time period during which the wireless device acquires system information of a second cell; obtaining a value Nmin associated with the flexible subframe allocation scheme, the value Nmin corresponding to a minimum number of uplink feedback signals that the wireless device shall transmit in response to downlink data during the time period; transmitting downlink data to the wireless device in the first cell during the time period; and receiving at least the minimum number Nmin of uplink feedback signals in the first cell in response to the transmitted downlink data. ### Claim 57 (depends on 56) The method according to claim 56, further comprising: transmitting a request to the wireless device to report the system information of the second cell. ### Claim 58 (depends on 56) The method according to claim 56, further comprising: receiving system information of the second cell from the wireless device. ### Claim 59 (depends on 56) The method according to claim 56, wherein the system information comprises information uniquely identifying the second cell. ### Claim 60 (depends on 56) The method according to claim 56, further comprising: transmitting information to the wireless device comprising the value Nmin. ### Claim 61 (depends on 56) The method according to claim 56, wherein the first cell is a PCell in multi-carrier operation or a SCell in multi-carrier operation. ### Claim 62 (depends on 56) The method according to claim 56, wherein the flexible subframe allocation scheme is a dynamic Time Division Duplex (TDD) or a Half Duplex Frequency Division Duplex (HD-FDD) subframe allocation scheme. ### Claim 63 (depends on 56) The method according to claim 56, wherein the uplink feedback signals comprise acknowledgement and non-acknowledgement signals as part of hybrid automatic retransmission request feedback. ### Claim 64 (depends on 56) The method according to claim 56, wherein obtaining the value Nmin comprises one of: retrieving the value Nmin stored in the network node; determining the value Nmin based on a pre-defined rule, expression or function; and determining the value Nmin based on an amount of data associated with the wireless device in a buffer of the network node. ### Claim 65 (depends on 56) The method according to claim 56, further comprising: adapting a scheduling scheme for the wireless device based on the minimum number of uplink feedback signals that the wireless device shall transmit in response to downlink data during the time period; and scheduling the wireless device using the adapted scheduling scheme. ### Claim 66 (depends on 56) The method according to claim 56, further comprising: adapting one or more parameters of the flexible subframe allocation scheme based on the minimum number of subframes in which the wireless device can be scheduled with downlink data during the time period; and wherein the configuration information transmitted to the wireless device configures the wireless device to operate with the adapted flexible subframe allocation scheme. ### Claim 67 A wireless device configured to, when located in a first cell operated by a network node of a wireless communication system: acquire system information of a second cell using at least one autonomous gap during a time period, wherein the wireless device is configured with a flexible subframe allocation scheme in the first cell during at least a part of the time period; obtain a value Nmin corresponding to a minimum number of uplink feedback signals, where the value Nmin is associated with the flexible subframe allocation scheme; and transmit at least the minimum number Nmin of uplink feedback signals in response to downlink data during the time period. ### Claim 68 (depends on 67) The wireless device according to claim 67, configured to: receive a request from the network node to report the system information of the second cell; and acquire the system information in response to the request. ### Claim 69 (depends on 67) The wireless device according to claim 67, configured to: transmit the acquired system information to the network node. ### Claim 70 (depends on 67) The wireless device according to claim 67, configured to acquire the system information comprising information uniquely identifying the second cell. ### Claim 71 (depends on 67) The wireless device according to claim 67, configured to transmit the uplink feedback signals in the first cell in response to downlink data received from the network node in the first cell. ### Claim 72 (depends on 67) The wireless device according to claim 67, configured to obtain the value Nmin by one of the following: receiving information from the network node comprising the value Nmin; retrieving the value Nmin stored in the wireless device; deriving the value Nmin based on a pre-defined rule, expression or function. ### Claim 73 (depends on 67) The wireless device according to claim 67, configured with the flexible subframe allocation scheme, based on configuration information received from the network node. ### Claim 74 (depends on 67) The wireless device according to claim 67, wherein the first cell is one of the following: a serving cell, a PCell in multi-carrier operation, or a SCell in multi-carrier operation. ### Claim 75 (depends on 67) The wireless device according to claim 67, wherein the flexible subframe allocation scheme is a dynamic Time Division Duplex, TDD, or a Half Duplex Frequency Division Duplex, HD-FDD subframe allocation scheme. ### Claim 76 (depends on 67) The wireless device according to claim 67, wherein the uplink feedback signals comprise acknowledgement and non-acknowledgement signals as part of hybrid automatic retransmission request feedback. ### Claim 77 A network node for a wireless communication system configured to operate a first cell, wherein a wireless device is served by the first cell, the network node being configured to: transmit configuration information to the wireless device, configuring the wireless device to operate with a flexible subframe allocation scheme in the first cell during at least part of a time period during which the wireless device acquires system information of a second cell; obtain a value Nmin associated with the flexible subframe allocation scheme, the value Nmin corresponding to a minimum number of uplink feedback signals that the wireless device shall transmit in response to downlink data during the time period; transmit downlink data to the wireless device in the first cell during the time period; and receive at least the minimum number Nmin of uplink feedback signals in the first cell in response to the transmitted downlink data. ### Claim 78 (depends on 77) The network node according to claim 77, further configured to: transmit a request to the wireless device to report the system information of the second cell. ### Claim 79 (depends on 77) The network node according to claim 77, further configured to: receive system information of the second cell from the wireless device. ### Claim 80 (depends on 77) The network node according to claim 77, wherein the system information comprises information uniquely identifying the second cell. ### Claim 81 (depends on 77) The network node according to claim 77, further configured to: transmit information to the wireless device comprising the value Nmin. ### Claim 82 (depends on 77) The network node according to claim 77, wherein the first cell is a PCell in multi-carrier operation or a SCell in multi-carrier operation. ### Claim 83 (depends on 77) The network node according to claim 77, wherein the flexible subframe allocation scheme is a dynamic Time Division Duplex (TDD) or a Half Duplex Frequency Division Duplex (HD-FDD) subframe allocation scheme. ### Claim 84 (depends on 77) The network node according to claim 77, wherein the uplink feedback signals comprise acknowledgement and non-acknowledgement signals as part of hybrid automatic retransmission request feedback. ### Claim 85 (depends on 77) The network node according to claim 77, configured to obtain the value Nmin by one of the following: retrieving the value Nmin stored in the network node; determining the value Nmin based on a pre-defined rule, expression or function; and determining the value Nmin based on an amount of data associated with the wireless device in a buffer of the network node. ### Claim 86 (depends on 77) The network node according to claim 77, further configured to: adapt a scheduling scheme for the wireless device based on the minimum number Nmin of uplink feedback signals that the wireless device shall transmit in response to downlink data during the time period; and schedule the wireless device using the adapted scheduling scheme. ### Claim 87 (depends on 77) The network node according to claim 77, further configured to: adapt one or more parameters of the flexible subframe allocation scheme based on the minimum number of subframes in which the wireless device can be scheduled with downlink data during the time period; and transmit configuration information to the wireless device, configuring the wireless device to operate with the adapted flexible subframe allocation scheme. ### Claim 88 A non-transitory computer readable medium storing a computer program comprising computer readable code that, when executed on a processing circuit of a wireless device located in a first cell operated by a network node of a wireless communication system, causes the processing circuit to: acquire system information of a second cell using at least one autonomous gap during a time period, wherein the wireless device is configured to use a flexible subframe allocation scheme in the first cell during at least a part of the time period; obtain a value Nmin corresponding to a minimum number of uplink feedback signals, where the value Nmin is associated with the flexible subframe allocation scheme; and transmit at least the minimum number Nmin of uplink feedback signals in response to downlink data during the time period. ### Claim 89 A non-transitory computer readable medium storing a computer program comprising computer readable code that, when executed on a processing circuit of a network node of a wireless communication system configured to operate a first cell that serves a wireless device, causes the processing circuit to: transmit configuration information to the wireless device, configuring the wireless device to use a flexible subframe allocation scheme in the first cell during at least part of a time period during which the wireless device acquires system information of a second cell; obtain a value Nmin associated with the flexible subframe allocation scheme, the value Nmin corresponding to a minimum number of uplink feedback signals that the wireless device shall transmit in response to downlink data during the time period; transmit downlink data to the wireless device in the first cell during the time period; and receive at least the minimum number Nmin of uplink feedback signals in the first cell in response to the transmitted downlink data.