# US 2018/0324644 A1 · Flow Control Feedback from User Equipment Receiving a Split Bearer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0324644 A1 - Document ID: US20180324644A1 - Status: Published application - Kind: A1 - Application number: 15/773,275 - Filed: 2016-10-27 - Published: 2018-11-08 - Earliest claimed: 2015-11-06 - Assignees: Nokia Technologies Oy - Applicants: Nokia Technologies Oy - Inventors: Henri M. Koskinen; Georg-Raffael Janczyk - Web page: https://patentgrep.com/patent/US20180324644A1 ## CPC - H04W 28/12: using signalling between network elements - H04L 47/122: by diverting traffic away from congested entities - H04L 47/30: in combination with information about buffer occupancy at either end or at transit nodes - H04L 47/34: ensuring sequence integrity, e.g. using sequence numbers - H04W 28/0278: {using buffer status reports (dynamic wireless traffic scheduling definition H04W72/12)} - H04W 28/082: among bearers or channels - H04W 80/02: Data link layer protocols - H04W 84/12: WLAN [Wireless Local Area Networks] - 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 accordance with the example embodiments of the invention there is at least an apparatus and method to perform triggering creation of a flow control report comprising information of at least one of a highest count value of protocol data units received over a particular wireless link and protocol data units not received so far, wherein the protocol data units not received so far are limited to protocol data units with count values falling within a range of count values determined using preconfigured rules; and communicating the flow control report between a user equipment and a base station. ## Claims ### Claim at position 1 1-22. (canceled) ### Claim 23 An apparatus, comprising: at least one processor; and at least one memory including computer program code, where the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to at least: trigger a creation of a flow control report comprising information of at least one of a highest count value of protocol data units received over a particular wireless link and protocol data units not received so far, wherein the protocol data units not received so far are limited to protocol data units with count values falling within a range of count values determined using preconfigured rules; and communicate the flow control report between a user equipment and a base station. ### Claim 24 (depends on 23) The apparatus of claim 23, wherein in the flow control report, an upper end of the range of count values is based on the highest count value of the protocol data units received over the particular wireless link. ### Claim 25 (depends on 23) The apparatus of claim 23, wherein in the flow control report a lower end of the range of count values is based on at least one of a count value of a first missing protocol data unit and an upper end of a count-value range that a most recent previously sent flow control report was limited to. ### Claim 26 (depends on 25) The apparatus of claim 25, wherein an upper end of the count-value range covered in the most recent previously sent flow control report is stored as a packet data convergence protocol state variable. ### Claim 27 (depends on 23) The apparatus of claim 23, wherein the triggering the creation of the flow control report is based on an increase in at least one of the highest count value of the protocol data units received over the particular wireless link, a value of a first missing segment, and the number of protocol data units received over the particular wireless link since a most recent previously sent flow control report. ### Claim 28 (depends on 23) The apparatus of claim 23, wherein the triggering the creation of the flow control report is based on a received packet data convergence protocol service data unit delivered to upper layers when no received service data units remain stored. ### Claim 29 (depends on 23) The apparatus of claim 23, comprising a status-prohibit timer, wherein the flow control report is communicated after an expiration of the timer. ### Claim 30 A method comprising: triggering a creation of a flow control report comprising information of at least one of a highest count value of protocol data units received over a particular wireless link and protocol data units not received so far, wherein the protocol data units not received so far are limited to protocol data units with count values falling within a range of count values determined using preconfigured rules; and communicating the flow control report between a user equipment and a base station. ### Claim 31 (depends on 30) The method of claim 30, wherein in the flow control report, an upper end of the range of count values is based on the highest count value of the protocol data units received over the particular wireless link. ### Claim 32 (depends on 30) The method of claim 30, wherein in the flow control report a lower end of the range of count values is based on at least one of a count value of a first missing protocol data unit and an upper end of a count-value range that a most recent previously sent flow control report was limited to. ### Claim 33 (depends on 32) The method of claim 32, wherein an upper end of the count-value range covered in the most recent previously sent flow control report is stored as a packet data convergence protocol state variable. ### Claim 34 (depends on 30) The method of claim 30, wherein the triggering the creation of the flow control report is based on an increase in at least one of the highest count value of the protocol data units received over the particular wireless link, a value of a first missing segment, and the number of protocol data units received over the particular wireless link since a most recent previously sent flow control report. ### Claim 35 (depends on 30) The method of claim 30, wherein the triggering the creation of the flow control report is based on a received packet data convergence protocol service data unit delivered to upper layers when no received service data units remain stored. ### Claim 36 (depends on 30) The method of claim 30, wherein communicating the flow control report can be after an expiration of a status-prohibit timer. ### Claim 37 A non-transitory computer-readable medium storing program code, the program code executed by at least one processor to perform at least the following: triggering a creation of a flow control report comprising information of at least one of a highest count value of protocol data units received over a particular wireless link and protocol data units not received so far, wherein the protocol data units not received so far are limited to protocol data units with count values falling within a range of count values determined using preconfigured rules; and communicating the flow control report between a user equipment and a base station. ### Claim 38 (depends on 37) The non-transitory computer-readable medium of claim 37, wherein in the flow control report, an upper end of the range of count values is based on the highest count value of the protocol data units received over the particular wireless link. ### Claim 39 (depends on 37) The non-transitory computer-readable medium of claim 37, wherein in the flow control report a lower end of the range of count values is based on at least one of a count value of a first missing protocol data unit and an upper end of a count-value range that a most recent previously sent flow control report was limited to. ### Claim 40 (depends on 39) The non-transitory computer-readable medium of claim 39, wherein an upper end of the count-value range covered in the most recent previously sent flow control report is stored as a packet data convergence protocol state variable. ### Claim 41 (depends on 37) The non-transitory computer-readable medium of claim 37, wherein the triggering the creation of the flow control report is based on an increase in at least one of the highest count value of the protocol data units received over the particular wireless link, a value of a first missing segment, and the number of protocol data units received over the particular wireless link since a most recent previously sent flow control report. ### Claim 42 (depends on 37) The non-transitory computer-readable medium of claim 37, wherein the triggering the creation of the flow control report is based on a received packet data convergence protocol service data unit delivered to upper layers when no received service data units remain stored. ### Claim 43 (depends on 37) The non-transitory computer-readable medium of claim 37, wherein communicating the flow control report can be after an expiration of a status-prohibit timer.