# US 12,192,815 B2 · Communication method and device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,192,815 B2 - Document ID: US12192815B2 - Status: Granted - Kind: B2 - Application number: 17/732,148 - Filed: 2022-04-28 - Published: 2022-08-11 - Granted: 2025-01-07 - Earliest claimed: 2019-10-31 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Fang Yu; Yan Li; Hui Ni - Web page: https://patentgrep.com/patent/US12192815B2 ## CPC - H04W 28/0236: {radio quality, e.g. interference, losses or delay} - H04L 45/80: Ingress point selection by the source endpoint, e.g. selection of ISP or POP - H04W 28/0268: {using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] (negotiating SLA or negotiating QoS H04W28/24)} - H04W 28/086: among access entities - H04W 28/0975: {for reducing delays} - H04W 40/12: based on transmission quality or channel quality - H04W 72/543: based on requested quality, e.g. QoS - H04W 76/12: Setup of transport tunnels - H04W 88/085: {Access point devices with remote components} - 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 communication method includes: determining a first central unit (CU)-user plane (UP) and a user plane function (UPF) network element that correspond to a quality of service (QoS) flow, where an access network device to which the first CU-UP belongs supports at least two CU-UPs; determining a first packet delay budget (PDB) for transmitting the QoS flow between the first CU-UP and the UPF network element; and sending the first PDB to the access network device, where the first PDB is used by the access network device to schedule an air interface resource. After the CU-UP corresponding to the QoS flow is determined, the PDB of the CU-UP corresponding to the QoS flow may be sent to the radio access network (RAN) device. ## Claims ### Claim 1 A communication method, comprising: determining, by a communication apparatus, a first central unit user plane (CU-UP) and a user plane function (UPF) network element that correspond to a quality of service (QoS) flow, wherein an access network device to which the first CU-UP belongs supports at least two CU-UPs; determining, by the communication apparatus, a first packet delay budget (PDB) for transmitting the QoS flow between the first CU-UP and the UPF network element; and sending, by the communication apparatus, the first PDB to the access network device, wherein the first PDB is to be used by the access network device to schedule an air interface resource; wherein sending the first PDB to the access network device comprises: initiating a session modification procedure; and sending the first PDB to the access network device in the session modification procedure; wherein before initiating the session modification procedure, the method further comprises determining that the access network device supports the at least two CU-UPs, wherein determining that the access network device supports the at least two CU-UPs comprises: determining that a plurality of PDBs are configured for a same 5G QoS identifier (5QI) between the access network device and the UPF network element. ### Claim 2 (depends on 1) The method according to claim 1, further comprising: receiving first indication information, wherein the first indication information indicates an identifier of the first CU-UP corresponding to the QoS flow. ### Claim 3 (depends on 2) The method according to claim 2, further comprising: obtaining respective PDBs of respective data packets that are of a same type as the QoS flow and that are transmitted between each respective CU-UP of the at least two CU-UPs and the UPF network element, wherein the obtained PDBs comprise the first PDB. ### Claim 4 (depends on 1) The method according to claim 1, wherein before initiating the session modification procedure, the method further comprises: determining that the QoS flow is a specific QoS flow, a PDB between the access network device and the UPF network element changes, or a PDB corresponding to the QoS flow is not sent to the access network device. ### Claim 5 (depends on 1) The method according to claim 1, wherein determining that the access network device supports the at least two CU-UPs comprises: receiving, from the access network device, second indication information indicating that the access network device supports the at least two CU-UPs. ### Claim 6 (depends on 1) The method according to claim 1, wherein determining that the access network device supports the at least two CU-UPs comprises: determining that the UPF network element corresponds to at least two CU-UP addresses of the access network device, wherein the at least two CU-UP addresses correspond to different PDBs for a same 5G QoS identifier (5QI). ### Claim 7 A communication method, comprising: determining, by a communication apparatus, an access network device and a user plane function (UPF) network element that correspond to a quality of service (QoS) flow, wherein the access network device supports at least two central unit user planes (CU-UPs); determining, by the communication apparatus, respective packet delay budgets (PDBs) of respective data packets that are of a same type as the QoS flow and that are transmitted between each respective CU-UP of the at least two CU-UPs and the UPF network element; and sending, by the communication apparatus, to the access network device, the PDBs; wherein sending the PDBs to the access network device comprises: initiating a session modification procedure; and sending the PDBs to the access network device in the session modification procedure; wherein before initiating the session modification procedure, the method further comprises determining that the access network device supports the at least two CU-UPs, wherein determining that the access network device supports the at least two CU-UPs comprises: determining that a plurality of PDBs are configured for a same 5G QoS identifier (5QI) between the access network device and the UPF network element. ### Claim 8 (depends on 7) The method according to claim 7, wherein the data packets are transmitted between respective deployment locations of each respective CU-UP of the at least two CU-UPs and the UPF network element. ### Claim 9 (depends on 7) The method according to claim 7, further comprising: obtaining location information of each CU-UP of the at least two CU-UPs; and sending the location information to the access network device. ### Claim 10 (depends on 7) The method according to claim 7, wherein the PDBs are sent in an establishment process of the QoS flow, an activation process of the QoS flow, or a handover process of the QoS flow. ### Claim 11 A communication method, comprising: receiving, by an access network device supporting at least two central unit user planes (CU-UPs), from a session management function (SMF) network element, respective packet delay budgets (PDBs) of respective data packets that are of a same type as a quality of service (QoS) flow and that are transmitted between each respective CU-UP of the at least two CU-UPs and a user plane function (UPF) network element; and selecting, by the access network device, based on the received PDBs, one CU-UP from the at least two CU-UPs, to transmit the QoS flow; wherein the respective PDBs are received via a session modification procedure; wherein the access network device supports the at least two CU-UPs; and wherein a plurality of PDBs are configured for a same 5G QoS identifier (5QI) between the access network device and the UPF network element.