# US 2019/0173794 A1 · Methods and apparatus for multiple user uplink > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0173794 A1 - Document ID: US20190173794A1 - Status: Published application - Kind: A1 - Application number: 16/251,030 - Filed: 2019-01-17 - Published: 2019-06-06 - Earliest claimed: 2013-08-28 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Simone Merlin; Gwendolyn Barriac; Hemanth Sampath; Sameer Vermani - Web page: https://patentgrep.com/patent/US20190173794A1 ## CPC - H04B 7/0452: Multi-user MIMO systems - H04B 7/2621: {using frequency division multiple access [FDMA] (H04B7/2615 takes precedence)} - H04L 1/0031: {Multiple signaling transmission (H04L1/1664, F15 take precedence)} - H04L 1/1621: {Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers} - H04L 1/1854: {Scheduling and prioritising arrangements} - H04L 1/1858: {Transmission or retransmission of more than one copy of acknowledgement message} - H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)} - H04L 5/0005: {Time-frequency} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/003: {Arrangements for allocating sub-channels of the transmission path} - H04L 5/0037: {Inter-user or inter-terminal allocation} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 47/24: Traffic characterised by specific attributes, e.g. priority or QoS - H04L 47/72: using reservation actions during connection setup - H04L 47/805: {QOS or priority aware} - H04N 7/17309: {Transmission or handling of upstream communications} - H04W 8/04: Registration at HLR or HSS [Home Subscriber Server] - H04W 52/146: {Uplink power control} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 72/12: Wireless traffic scheduling - 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 74/002: {Transmission of channel access control information} - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04W 74/04: Scheduled access (hybrid access H04W74/02) - H04W 74/08: Non-scheduled access, e.g. ALOHA (hybrid access H04W74/02) - H04W 74/0816: with collision avoidance - H04L 1/0008: {by supplementing frame payload, e.g. with padding bits} - H04L 1/1607: Details of the supervisory signal - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 2001/0093: {Point-to-multipoint} - H04W 28/06: Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)} - H04W 28/24: Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service] - H04W 52/50: at the moment of starting communication in a multiple access environment - H04W 72/121: for groups of terminals or users - H04W 74/085: {collision avoidance} - Y02D 30/70: in wireless communication networks - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - 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 Methods and apparatus for multiple user uplink are provided. In one aspect, a method for wireless communication is provided. The method includes receiving a trigger frame from an access point, the trigger frame being transmitted to two or more stations and indicating an uplink transmission opportunity. The trigger frame further includes a request for the two or more stations to concurrently transmit uplink data at a specific time. The method includes transmitting uplink data at the specific time to the access point concurrently with another of the two or more stations transmitting uplink data to the access point. ## Claims ### Claim 1 A station for wireless communication comprising: a receiver configured to receive a trigger frame from an access point, the trigger frame being transmitted to the station and to at least another station, the trigger frame indicating an uplink transmission opportunity for the station to transmit a first uplink physical layer convergence protocol (PLCP) protocol data unit (PPDU) at a specific time and concurrently with the at least another station transmitting a second uplink PPDU, the trigger frame further comprising a duration field indicating a same duration of the first uplink PPDU and the second uplink PPDU; and a transmitter configured to transmit the first uplink PPDU at the specific time and with the indicated duration to the access point concurrently with the at least another station transmitting the second uplink PPDU to the access point. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the specific time is communicated based on a short interframe space (SIFS) or a point interframe space (PIFS) time after the end of the reception of the trigger frame. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the transmitter is further configured to transmit a clear to send (CTS) message having a scrambling sequence at a time after receiving the trigger frame and before transmitting the first uplink PPDU, the scrambling sequence being the same as a scrambling sequence of a clear to send (CTS) message transmitted by the at least another station. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the trigger frame comprises a group identifier (GID) field indicating the station and the at least another station as a group of stations to concurrently transmit uplink data at the specific time. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the trigger frame comprises a receiver address (RA) field indicating a unicast or multicast address which identifies the station and the at least another station to concurrently transmit uplink data at the specific time. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the trigger frame comprises a field indicating data rate information for the station and the at least another station as a group of stations to concurrently transmit uplink data at the specific time. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the trigger frame comprises one or more of a frame control field, a transmitter address field, a duration field, and a basic service set identifier (BSSID) field. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the trigger frame comprises a management frame or a control frame. ### Claim 9 (depends on 1) The apparatus of claim 1, wherein the trigger frame is received as an aggregated message with a second message. ### Claim 10 (depends on 1) The apparatus of claim 1, wherein the transmitter is further configured to transmit a request for transmission of the first uplink PPDU to the access point. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein the request to transmit the first uplink PPDU comprises a request to send (RTS) message, a request to transmit (RTX) message, a power save (PS) poll message, or a quality of service (QoS) null message. ### Claim 12 (depends on 10) The apparatus of claim 10, wherein the receiver is further configured to receive a second trigger frame in response to the request for transmission of the first uplink PPDU, the second trigger frame indicating the request for transmission of the first uplink PPDU has been received but excluding an indication of the uplink transmission opportunity. ### Claim 13 (depends on 1) The apparatus of claim 1, wherein the trigger frame comprises one or more station (STA) information fields for a particular station. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein the station (STA) information field comprises a tone allocation field indicating the tone and/or frequencies for transmission of the first uplink PPDU using a frequency division multiple access (FDMA) system and/or an orthogonal FDMA system. ### Claim 15 (depends on 13) The apparatus of claim 13, wherein the station (STA) information field comprises a transmission start time field indicating a start time for transmission of the first uplink PPDU. ### Claim 16 (depends on 13) The apparatus of claim 13, wherein the station (STA) information field comprises one or more of an address identifier field, a number and index of spatial streams, a time adjustment field, a power adjustment field, an allowed traffic identifier field, and a modulation and coding scheme field. ### Claim 17 (depends on 13) The apparatus of claim 13, wherein the station (STA) information field comprises an indication of allowed transmission modes. ### Claim 18 (depends on 17) The apparatus of claim 17, wherein the indication of allowed transmission modes comprises one or more of a short/long guard interval (GI) or cyclic prefix mode, a binary convolutional code (BCC)/low density parity check (LDPC) mode, and a space-time block coding (STBC) mode. ### Claim 19 A method for wireless communication, comprising: receiving a trigger frame from an access point, the trigger frame being transmitted to the station and to at least another station, the trigger frame indicating an uplink transmission opportunity for the station to transmit a first uplink physical layer convergence protocol (PLCP) protocol data unit (PPDU) at a specific time and concurrently with the at least another station transmitting a second uplink PPDU, the trigger frame further comprising a duration field indicating a same duration of the first uplink PPDU and the second uplink PPDU; and transmitting the first uplink PPDU at the specific time and with the indicated duration to the access point concurrently with the at least another station transmitting the second uplink PPDU to the access point. ### Claim 20 (depends on 19) The method of claim 19, wherein the specific time is communicated based on a short interframe space (SIFS) or a point interframe space (PIFS) time after the end of the reception of the trigger frame. ### Claim 21 (depends on 19) The method of claim 19, wherein the trigger frame is received as an aggregated message with a second message. ### Claim 22 (depends on 19) The method of claim 19, wherein the trigger frame comprises a receiver address (RA) field indicating a unicast or multicast address which identifies the station and to at least another station to concurrently transmit uplink data at the specific time, wherein the trigger frame further comprises a station (STA) information field. ### Claim 23 (depends on 22) The method of claim 22, wherein the station (STA) information field comprises one or more of an address identifier field, a number of spatial streams field, a time adjustment field, a power adjustment field, an allowed traffic identifier field, and a modulation and coding scheme field. ### Claim 24 An apparatus for wireless communication comprising: means for receiving a trigger frame from an access point, the trigger frame being transmitted to the station and to at least another station, the trigger frame indicating an uplink transmission opportunity for the station to transmit a first uplink physical layer convergence protocol (PLCP) protocol data unit (PPDU) at a specific time and concurrently with the at least another station transmitting a second uplink PPDU, the trigger frame further comprising a duration field indicating a same duration of the first uplink PPDU and the second uplink PPDU; and means for transmitting the first uplink PPDU at the specific time and with the indicated duration to the access point concurrently with the at least another station transmitting the second uplink PPDU to the access point. ### Claim 25 (depends on 24) The apparatus of claim 24, wherein the trigger frame comprises a receiver address (RA) field indicating a unicast or multicast address which identifies the station and to at least another station to concurrently transmit uplink data at the specific time, wherein the trigger frame further comprises a station (STA) information field. ### Claim 26 (depends on 25) The apparatus of claim 25, wherein the station (STA) information field comprises one or more of an address identifier field, a number of spatial streams field, a time adjustment field, a power adjustment field, an allowed traffic identifier field, and a modulation and coding scheme field. ### Claim 27 (depends on 25) The apparatus of claim 25, wherein the station (STA) information field comprises a tone allocation field indicating the tone and/or frequencies for transmission of the first uplink PPDU using a frequency division multiple access (FDMA) system and/or an orthogonal FDMA system. ### Claim 28 A non-transitory computer readable medium comprising instructions that when executed cause a processor to perform a method of: receiving a trigger frame from an access point, the trigger frame being transmitted to the station and to at least another station, the trigger frame indicating an uplink transmission opportunity for the station to transmit a first uplink physical layer convergence protocol (PLCP) protocol data unit (PPDU) at a specific time and concurrently with the at least another station transmitting a second uplink PPDU, the trigger frame further comprising a duration field indicating a same duration of the first uplink PPDU and the second uplink PPDU; and transmitting the first uplink PPDU at the specific time and with the indicated duration to the access point concurrently with the at least another station transmitting the second uplink PPDU to the access point. ### Claim 29 (depends on 28) The medium of claim 28, wherein the method further comprises transmitting a clear to send (CTS) messages having a scrambling sequence at a time after receiving the trigger frame and before transmitting the first uplink PPDU. ### Claim 30 (depends on 28) The medium of claim 28, wherein receiving the trigger frame comprises receiving the trigger frame in response to a request for transmission of uplink data.