# US 2014/0192778 A1 · Node b and rnc actions during a serving hsdpa cell change > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192778 A1 - Document ID: US20140192778A1 - Status: Published application - Kind: A1 - Application number: 14/209,553 - Filed: 2014-03-13 - Published: 2014-07-10 - Earliest claimed: 2002-04-05 - Assignees: InterDigital Technology Corporation - Applicants: Interdigital Technology Corporation - Inventors: Yi-Ju Chao; Stephen E. Terry - Web page: https://patentgrep.com/patent/US20140192778A1 ## CPC - H04W 36/023: {Buffering or recovering information during reselection} - H04L 1/0003: {by switching between different modulation schemes} - H04L 1/0009: {by adapting the channel coding (H04L1/1812 takes precedence)} - H04L 1/0015: {characterised by the adaptation strategy} - H04L 1/0033: {arrangements specific to the transmitter} - H04W 72/569: {of the traffic information} - 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 An apparatus and method in accordance with the present invention reduce the amount of data that is stalled in a source Node B after a serving HS-DSCH cell change in a communication system that includes a serving RNC and at least one Node B. In a first embodiment, the RNC temporarily suspends data transmissions from the RNC to the Node B. In a second embodiment, the activation time is used in data scheduling. In a third embodiment, a more robust MCS level is selected. In a fourth embodiment flow control is employed for the data transmitted between the RNC and the Node B. ## Claims ### Claim 1 A method for efficient delivery of data in wireless communications that includes a radio network controller (RNC) associated with at least one Node B, the at least one Node B communicating with a plurality of user equipments (UEs), and at least one of the plurality of UEs communicating within a cell and undergoing a high-speed downlink shared channel (HS-DSCH) cell change, the method comprising: determining at the RNC the need for an HS-DSCH cell change and for generating a notification to the at least one Node B regarding the cell change; suspending at the RNC all further data transmissions to the at least one Node B serving the at least one UE; and sending from the RNC to the at least one Node B the notification. ### Claim 2 (depends on 1) The method of claim 1 wherein the notification indicates an activation time. ### Claim 3 (depends on 2) The method of claim 2 further comprising: the at least one Node B receiving feedback from the UEs; and the at least one Node B determining a modulation and coding set (MCS) level based on the feedback and the activation time. ### Claim 4 (depends on 2) The method of claim 2 wherein the activation time is an explicit moment of time known in the at least one Node B when the at least one UE stops listening to a HS-DSCH in a source cell and starts listening to a HS-DSCH in a target cell. ### Claim 5 (depends on 2) The method of claim 2 further comprising: in response to receiving the notification, the at least one Node B scheduling data for transmission to the at least one UE to produce scheduled data by giving a higher priority to data transmissions of the at least one UE to provide a greater resource allocation than would normally be given to the at least one UE in a time interval ending at the activation time of the HS-DSCH cell change. ### Claim 6 (depends on 5) The method of claim 5 further comprising: the at least one Node B applying a modulation and coding set (MCS) level to the scheduled data to generate modulated data based upon the activation time, wherein the activation time indicates when the at least one Node B will complete the transmission of the modulated data to the at least one UE; and the at least one Node B transmitting the modulated data to the at least one UE prior to the activation time. ### Claim 7 A radio network controller (RNC) comprising: circuitry configured to transmit data transmissions to at least one Node B associated with the RNC, wherein the at least one Node B communicates with a plurality of user equipment (UEs), and at least one of the plurality of UEs communicates within a cell and undergoes a high-speed downlink shared channel (HS-DSCH) cell change; the circuitry further configured to determine a need for an HS-DSCH cell change and generate a notification to the at least one Node B regarding the cell change; the circuitry further configured to suspend all further data transmissions to the at least one Node B serving the at least one UE; and sending from the RNC to the at least one Node B the notification. ### Claim 8 (depends on 7) The RNC of claim 7 wherein the notification indicates an activation time. ### Claim 9 (depends on 8) The RNC of claim 8 wherein the activation time is an explicit moment of time known in the at least one Node B when the at least one UE stops listening to a HS-DSCH in a source cell and starts listening to a HS-DSCH in a target cell.