# US 12,004,247 B2 · User equipment assistance information for voice over cellular > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,247 B2 - Document ID: US12004247B2 - Status: Granted - Kind: B2 - Application number: 17/440,035 - Filed: 2020-06-25 - Published: 2022-05-19 - Granted: 2024-06-04 - Earliest claimed: 2019-06-25 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Jerome Parron; Yujian Zhang; Ozgur Oyman - Web page: https://patentgrep.com/patent/US12004247B2 ## CPC - H04L 65/1069: Session establishment or de-establishment - H04W 76/15: Setup of multiple wireless link connections - H04L 43/0835: {One way packet loss} - H04L 43/0858: {One way delays} - H04L 43/087: Jitter - H04L 65/80: Responding to QoS - H04W 28/0278: {using buffer status reports (dynamic wireless traffic scheduling definition H04W72/12)} - H04W 40/22: using selective relaying for reaching a BTS [Base Transceiver Station] or an access point - H04W 72/542: using measured or perceived quality - H04L 65/65: Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP] - H04W 80/02: Data link layer protocols - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Disclosed are methods, systems, apparatus, and computer programs for providing a network with assistance information from a user equipment (UE) that is participating in a multimedia telephony session. In one aspect, a method includes determining a connection parameter of a multimedia telephony session between a user equipment (UE) and a remote UE. The method further includes generating assistance information based on the connection parameter. Yet further, the method include sending, using a medium access control (MAC) control element, the assistance information to an access node (AN) serving the UE. ## Claims ### Claim 1 A method comprising: determining a connection parameter of a multimedia telephony session between a user equipment (UE) and a remote UE; generating assistance information based on the connection parameter; and sending the assistance information to an access node (AN) serving the UE, wherein a plurality of Radio Link Control (RLC) bearers are connected to a Packet Data Convergence Protocol (PDCP) entity of the UE, and wherein the assistance information further comprises a request to the access node to change a default RLC bearer of the plurality of RLC bearers. ### Claim 2 (depends on 1) The method of claim 1, wherein determining the connection parameter of the multimedia telephony session comprises: measuring an end-to-end delay of the multimedia telephony session. ### Claim 3 (depends on 1) The method of claim 1, wherein generating assistance information based on the connection parameter comprises: requesting from the remote UE a delay budget of a remote radio link of the remote UE; determining a delay budget for a local radio link of the UE based on at least one of: an end-to-end delay measurement of the multimedia telephony session, or the delay budget of the remote radio link of the multimedia telephony session; and generating a delay budget indicator based on the delay budget for the local radio link, wherein the assistance information comprises the delay budget indicator. ### Claim 4 (depends on 1) The method of claim 1, wherein determining the connection parameter of the multimedia telephony session comprises: determining a robustness of a codec used in connection with the multimedia telephony session. ### Claim 5 (depends on 1) The method of claim 1, wherein generating assistance information based on the connection parameter comprises: generating a robustness indicator based on at least one of: feedback from a jitter buffer indicative of a packet drop rate or robustness of a codec used in connection with the multimedia telephony session to packet loss, wherein the assistance information comprises the robustness indicator. ### Claim 6 (depends on 5) The method of claim 5, wherein the robustness indicator comprises a maximum supported packet loss rate over a radio local link of the UE. ### Claim 7 (depends on 5) The method of claim 5, wherein the codec robustness indicator comprises a target block error rate (BLER). ### Claim 8 (depends on 1) The method of claim 1, wherein generating assistance information based on the connection parameter comprises: determining a packet loss rate applicable for a local radio link of the UE based on: (i) a robustness of a codec used in connection with the multimedia telephony session to packet loss, and (ii) a packet loss observed on a remote radio link of the remote UE; and generating a robustness indicator based on the packet loss rate, wherein the assistance information comprises the robustness indicator. ### Claim 9 (depends on 1) The method of claim 1, the assistance information further comprising a request to the access node to adjust a delay budget of a local radio link of the UE. ### Claim 10 (depends on 1) The method of claim 1, the assistance information further comprising a request to the access node to enable Packet Data Convergence Protocol (PDCP) packet duplication. ### Claim 11 One or more processors configured to execute instructions to perform operations comprising: determining a connection parameter of a multimedia telephony session between a user equipment (UE) and a remote UE; generating assistance information based on the connection parameter; and sending the assistance information to an access node (AN) serving the UE, wherein a plurality of Radio Link Control (RLC) bearers are connected to a Packet Data Convergence Protocol (PDCP) entity of the UE, and wherein the assistance information further comprises a request to the access node to change a default RLC bearer of the plurality of RLC bearers. ### Claim 12 (depends on 11) The one or more processors of claim 11, wherein determining the connection parameter of the multimedia telephony session comprises: measuring an end-to-end delay of the multimedia telephony session. ### Claim 13 (depends on 11) The one or more processors of claim 11, wherein generating assistance information based on the connection parameter comprises: requesting from the remote UE a delay budget of a remote radio link of the remote UE; determining a delay budget for a local radio link of the UE based on at least one of: an end-to-end delay measurement of the multimedia telephony session, or the delay budget of the remote radio link of the multimedia telephony session; and generating a delay budget indicator based on the delay budget for the local radio link, wherein the assistance information comprises the delay budget indicator. ### Claim 14 (depends on 11) The one or more processors of claim 11, wherein determining the connection parameter of the multimedia telephony session comprises: determining a robustness of a codec used in connection with the multimedia telephony session. ### Claim 15 (depends on 11) The one or more processors of claim 11, wherein generating assistance information based on the connection parameter comprises: generating a robustness indicator based on at least one of: feedback from a jitter buffer indicative of a packet drop rate or robustness of a codec used in connection with the multimedia telephony session to packet loss, wherein the assistance information comprises the robustness indicator. ### Claim 16 (depends on 15) The one or more processors of claim 15, wherein the robustness indicator comprises a maximum supported packet loss rate over a radio local link of the UE. ### Claim 17 (depends on 15) The one or more processors of claim 15, wherein the codec robustness indicator comprises a target block error rate (BLER). ### Claim 18 A non-transitory computer storage medium encoded with instructions that, when executed by one or more processors, cause the one or more processors to perform operations comprising: determining a connection parameter of a multimedia telephony session between a user equipment (UE) and a remote UE; generating assistance information based on the connection parameter; and sending the assistance information to an access node (AN) serving the UE, wherein a plurality of Radio Link Control (RLC) bearers are connected to a Packet Data Convergence Protocol (PDCP) entity of the UE, and wherein the assistance information further comprises a request to the access node to change a default RLC bearer of the plurality of RLC bearers.