# US 9,439,211 B2 · Buffer status reporting in a mobile communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,439,211 B2 - Document ID: US9439211B2 - Status: Granted - Kind: B2 - Application number: 14/734,982 - Filed: 2015-06-09 - Published: 2015-10-22 - Granted: 2016-09-06 - Earliest claimed: 2009-04-03 - Assignees: Panasonic Intellectual Property Corporation of America - Applicants: Panasonic Intellectual Property Corporation of America - Inventors: Martin Feuersaenger; Joachim Loehr; Christian Wengerter - Web page: https://patentgrep.com/patent/US9439211B2 ## CPC - H04W 28/0278: {using buffer status reports (dynamic wireless traffic scheduling definition H04W72/12)} - H04W 72/1268: of uplink data flows - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 72/543: based on requested quality, e.g. QoS - H04W 72/04: Wireless resource allocation - H04W 88/08: Access point devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract An invention relates to methods for transmitting a buffer status report (BSR) in a mobile communication system, more particularly to the definition of rules for triggering, generating and transmitting BSRs. The invention also relates to a data transmission method utilizing new rules to decide data of which radio bearers is transmitted within a given transmission time interval. Moreover, the invention relates to scheduling method for radio resources that is taking into account additional scheduling-relevant information from the buffer status reporting and/or data transmission method. To avoid unnecessary grants from the network and to suggest an advanced handling of data transmissions the invention suggests a buffer status reporting and data transmission schemes that take into account the scheduling mode of data of radio bearers pending for transmission to decide whether to report on it in a buffer status report, respectively, whether to multiplex the data to a transport block for transmission. ## Claims ### Claim 1 A method for a base station comprising: transmitting, by the base station, a semi-persistent scheduling activation to a mobile terminal via physical downlink control channel signaling; receiving, by the base station, a scheduling request from the mobile terminal in order to request uplink resources for uplink transmission including transmission of a buffer status report when semi-persistent scheduling is not activated, wherein when semi-persistent scheduling is activated, the mobile terminal checks a setup information element of a respective logical channel to determine whether to trigger a scheduling request or not; when the mobile terminal determines to trigger the scheduling request, receiving, by the base station, the scheduling request transmitted from the mobile terminal for the logical channel; and when the mobile terminal determines not to trigger the scheduling request, not receiving, by the base station, the scheduling request from the mobile terminal; wherein the physical downlink control channel signaling is transmitted by the base station to the mobile terminal for activation of a scheduling mode, including a dynamic scheduling mode in which radio resources are dynamically allocated by dynamic grants and a semi-persistent scheduling mode in which radio resources are allocated on a semi-persistent basis by semi-persistent scheduling grants. ### Claim 2 (depends on 1) The method according to claim 1, further comprising: receiving, by the base station, the scheduling request in order to request uplink resources for transmitting the buffer status report by the mobile terminal, when i) semi-persistent scheduling is not activated, ii) there are no uplink resources allocated for a transmission time interval, and iii) the buffer status report has not been triggered. ### Claim 3 (depends on 1) The method according to claim 1, wherein the mobile terminal considers an activation status of a semi-persistent resource allocation in the transmission of the buffer status report. ### Claim 4 (depends on 1) The method according to claim 1, wherein the mobile terminal considers a scheduling mode status when deciding on which data of logical channels to report in the buffer status report. ### Claim 5 (depends on 4) The method according to claim 4, wherein the scheduling mode status is an activation of the semi-persistent scheduling or a deactivation of the semi-persistent scheduling. ### Claim 6 A base station comprising: a transmitter that transmits a semi-persistent scheduling activation to a mobile terminal via physical downlink control channel signaling; and a receiver that receives a scheduling request from the mobile terminal in order to request uplink resources for uplink transmission including transmission of a buffer status report when semi-persistent scheduling is not activated, wherein when semi-persistent scheduling is activated, the mobile terminal checks a setup information element of a respective logical channel to determine whether to trigger a scheduling request or not, when the mobile terminal determines to trigger the scheduling request, the receiver receives the scheduling request from the mobile terminal for the logical channel, when the mobile terminal determines not to trigger the scheduling request, the receiver does not receive the scheduling request from the mobile terminal, and the physical downlink control channel signaling is transmitted by the base station to the mobile terminal for activation of a scheduling mode, including a dynamic scheduling mode in which radio resources are dynamically allocated by dynamic grants and a semi-persistent scheduling mode in which radio resources are allocated on a semi-persistent basis by semi-persistent scheduling grants. ### Claim 7 (depends on 6) The base station according to claim 6, wherein the receiver receives the scheduling request in order to request uplink resources for transmitting the buffer status report, i) when semi-persistent scheduling is not activated, ii) there are no uplink resources allocated for a transmission time interval, and iii) the buffer status report has not been triggered.