# US 11,115,849 B2 · First unit, second unit and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,115,849 B2 - Document ID: US11115849B2 - Status: Granted - Kind: B2 - Application number: 16/270,161 - Filed: 2019-02-07 - Published: 2019-06-06 - Granted: 2021-09-07 - Earliest claimed: 2018-02-13 - Assignees: NEC Corporation - Applicants: NEC Corporation - Inventors: Toshihiro Yokoyama; Sadafuku Hayashi - Web page: https://patentgrep.com/patent/US11115849B2 ## CPC - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04L 43/0876: Network utilisation, e.g. volume of load or congestion level - H04L 43/0894: Packet rate - H04W 76/15: Setup of multiple wireless link connections - H04W 88/10: adapted for operation in multiple networks, e.g. multi-mode access points - H04W 88/12: Access point controller devices - 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 43/20: the monitoring system or the monitored elements being virtualised, abstracted or software-defined entities, e.g. SDN or NFV - H04W 80/08: Upper layer protocols {(network arrangements or communication protocols for networked applications H04L67/00)} - H04W 88/085: {Access point devices with remote components} - H04W 92/20: between access points - 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 In order to make it possible to report an amount of data from a secondary node (SN) to a master node (MN) in dual connectivity, there is provided a first unit according to the present disclosure which is a first unit of a central unit of a first base station. The first unit includes a controller and a transceiver. The central unit is configured to host at least PDCP layer in the first base station; and is connected to a distributed unit via a first interface, the distributed unit hosting RLC, MAC and PHY layers in the first base station. The controller is configured to host at least a user plane of the PDCP layer hosted by the central unit; and the transceiver is configured to transmit, to a second unit via a second interface, first information indicative of a volume of data processed by the first unit. The second unit is configured to host at least a control plane of the PDCP layer hosted by the central unit. ## Claims ### Claim 1 A method performed by a central unit-user plane (CU-UP) of a central unit (CU) for a base station, the method comprising: hosting at least a user plane of a Packet Data Convergence Protocol (PDCP) layer of the base station; and transmitting first information to a central unit-control plane (CU-CP) of the CU for the base station via a first interface, the first information indicating a volume of data, the CU-CP connected to a distributed unit (DU) via a F1 interface and configured to host at least a control plane (CP) of the PDCP layer hosted by the CU, and the DU configured to host a Radio Link Control RLC layer, a Medium Access Control (MAC) layer and Physical (PHY) layer of the base station. ### Claim 2 (depends on 1) The method according to claim 1, wherein the volume of data is an amount of data transmitted to a terminal apparatus. ### Claim 3 (depends on 1) The method according to claim 1, wherein the base station is a gNB. ### Claim 4 (depends on 1) The method according to claim 1, wherein the first information is transmitted by the CU-CP to a master node in Dual Connectivity. ### Claim 5 (depends on 1) The method according to claim 1, wherein the volume of data is counted by the CU-UP of the CU for the base station. ### Claim 6 (depends on 1) The method according to claim 1, wherein the first information is usage count Information Elements (IE). ### Claim 7 A method performed by a central unit-control plane (CU-CP) of a central unit (CU) for a base station, the CU-CP connected to a distributed unit (DU) via a F1 interface, and the DU configured to host a Radio Link Control RLC layer, a Medium Access Control (MAC) layer and Physical (PHY) layer of the base station, the method comprising: hosting at least a control plane of a Packet Data Convergence Protocol (PDCP) layer of the base station; and receiving first information from a central unit-user plane (CU-UP) of the CU for the base station via a first interface, the first information indicating a volume of data, the CU-UP configured to host at least a user plane of the PDCP layer of the central unit. ### Claim 8 (depends on 7) The method according to claim 7, wherein the volume of data is an amount of data transmitted to a terminal apparatus. ### Claim 9 (depends on 7) The method according to claim 7, wherein the base station is a gNB. ### Claim 10 (depends on 7) The method according to claim 7, wherein the first information is transmitted by the CU-CP to a master node in Dual Connectivity. ### Claim 11 (depends on 7) The method according to claim 7, wherein the volume of data is counted by the CU-UP of the CU for the first base station. ### Claim 12 A method performed by a base station including a central unit (CU), the method comprising: transmitting, by a central unit-user plane (CU-UP) of the CU, first information to a central unit-control plane (CU-CP) of the CU via a first interface, the first information indicating a volume of data, the CU-CP configured to host at least a control plane of a Packet Data Convergence Protocol (PDCP) layer of the CU and the CU-UP configured to host at least a user plane of the PDCP layer of the CU; and receiving, by the CU-CP of the CU, the first information from the CU-UP of the CU for the base station, the CU-CP connected to a distributed unit (DU) via a F1 interface, the DU hosting RLC (Radio Link Control), MAC (Medium Access Control) and PHY (Physical) layers of the base station. ### Claim 13 (depends on 12) The method according to claim 12, wherein the volume of data is an amount of data transmitted to a terminal apparatus. ### Claim 14 (depends on 12) The method according to claim 12, wherein the base station is a gNB. ### Claim 15 (depends on 12) The method according to claim 12, wherein the first information is transmitted by the CU-CP to a master node in Dual Connectivity. ### Claim 16 (depends on 12) The method according to claim 12, wherein the volume of data is counted by the CU-UP of the CU for the first base station.