# US 2019/0357142 A1 · Method and apparatus for transmission management in a wireless communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0357142 A1 - Document ID: US20190357142A1 - Status: Published application - Kind: A1 - Application number: 16/531,942 - Filed: 2019-08-05 - Published: 2019-11-21 - Earliest claimed: 2005-09-21 - Assignees: InterDigital Technology Corporation - Applicants: Interdigital Technology Corporation - Inventors: Mohammed Sammour; Sudheer A. Grandhi; Robert L. Olesen - Web page: https://patentgrep.com/patent/US20190357142A1 ## CPC - H04W 52/0219: {where the power saving management affects multiple terminals} - H04J 3/0605: {Special codes used as synchronising signal} - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 72/30: Resource management for broadcast services - H04W 74/04: Scheduled access (hybrid access H04W74/02) - H04L 43/10: Active monitoring, e.g. heartbeat, ping or trace-route - H04W 74/06: using polling - Y02D 30/70: in wireless communication networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract A method and apparatus may be used in wireless communications. The apparatus may be an access point (AP), and may transmit a power save frame. The power save frame may include one or more Uplink (UL) Transmission Times (ULT)s. The apparatus may determine that a station (STA) did not transmit during its respective ULT. The AP may transmit another power save frame. The other power save frame may include a modified ULT. The modified ULT may be for a STA that did not transmit during its respective ULT. The other power save frame may include an unmodified ULT. The unmodified ULT may be for a STA that did not transmit. ## Claims ### Claim 1 An IEEE 802.11 station (STA) comprising: a transceiver configured to receive, from an access point (AP), a first frame that includes an indication of a first uplink transmission time (ULT) associated with the STA during which the STA is permitted to transmit uplink data to the AP; a processor, coupled to the transceiver, configured to determine that transmission of uplink data during the first ULT associated with the STA is not possible, the processor and transceiver are configured to receive a second frame during the first ULT that includes an indication of a modified ULT associated the STA during which the STA is permitted to transmit uplink data to the AP; and the processor and the transceiver configured to transmit uplink data to the AP during the modified ULT associated with the STA. ### Claim 2 (depends on 1) The STA of claim 1, wherein the first frame is a power save frame. ### Claim 3 (depends on 1) The STA of claim 1, wherein the first and second frames are multiple receiver aggregate multi-poll/power save aggregation descriptor (MMP/PSAD) frames. ### Claim 4 (depends on 1) The STA of claim 1, wherein the first frame includes a second uplink transmission time (ULT) associated with a second station (STA). ### Claim 5 (depends on 4) The STA of claim 4, wherein the second frame includes the second ULT associated with the second STA. ### Claim 6 (depends on 5) The STA of claim 5, wherein the second ULT received in the second frame is unchanged as compared to the second ULT received in the first frame. ### Claim 7 (depends on 1) The STA of claim 1, wherein the processor and the transceiver are configured to receive the second frame after a point control function inter-frame spacing (PIFS) period after the start of the first ULT. ### Claim 8 A method for use in an IEEE 802.11 station (STA), the method comprising: receiving, from an access point (AP), a first frame that includes an indication of a first uplink transmission time (ULT) associated with the STA during which the STA is permitted to transmit uplink data to the AP; determining that transmission of uplink data to the AP is not possible; receiving a second frame during the first ULT that includes an indication of a modified ULT associated the STA during which the STA is permitted to transmit uplink data to the AP; and transmitting uplink data to the AP during the modified ULT associated with the STA. ### Claim 9 (depends on 8) The method of claim 8, wherein the first frame is a power save frame. ### Claim 10 (depends on 8) The method of claim 8, wherein the first and second frames are multiple receiver aggregate multi-poll/power save aggregation descriptor (MMP/PSAD) frames. ### Claim 11 (depends on 8) The method of claim 8, wherein the first frame includes a second uplink transmission time (ULT) associated with a second station (STA). ### Claim 12 (depends on 11) The method of claim 11, wherein the second frame includes the second ULT associated with the second STA. ### Claim 13 (depends on 12) The method of claim 12, wherein the second ULT received in the second frame is unchanged as compared to the second ULT received in the first frame. ### Claim 14 (depends on 8) The method of claim 8, further comprising: receiving the second frame after a point control function inter-frame spacing (PIFS) period after the start of the first ULT.