# US 11,451,271 B2 · Methods and apparatus for enhanced dynamic allocation for directional transmission > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,451,271 B2 - Document ID: US11451271B2 - Status: Granted - Kind: B2 - Application number: 16/347,075 - Filed: 2017-11-03 - Published: 2020-02-27 - Granted: 2022-09-20 - Earliest claimed: 2016-11-03 - Assignees: InterDigital Patent Holdings, Inc. - Applicants: Interdigital Patent Holdings, Inc. - Inventors: Hanqing Lou; Li-Hsiang Sun; Oghenekome Oteri; Rui Yang - Web page: https://patentgrep.com/patent/US11451271B2 ## CPC - H04B 7/0452: Multi-user MIMO systems - H04W 74/002: {Transmission of channel access control information} - H04B 7/0417: Feedback systems - H04B 7/0617: {for beam forming} - H04L 27/2601: {Multicarrier modulation systems} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 72/20: Control channels or signalling for resource management - H04W 84/12: WLAN [Wireless Local Area Networks] - H04B: TRANSMISSION - 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 Methods and apparatus are described herein for dynamic allocation of multiple channels and data streams for multi-channel transmission and multiple-input and multiple-output (MIMO). For example, a station (STA) may receive an enhanced poll (EPoll) frame that includes a time offset, a channel offset and antenna/sector settings from an access point (AP). The STA may transmit, based on the received EPoll frame, an enhanced service period request (ESPR) frame that includes a MIMO control field and a multi-channel control field. The MIMO control field may indicate whether the STA supports MIMO transmission. The multi-channel control field may indicate whether the STA supports multi-channel transmission. Upon transmitting the ESPR frame, the STA may receive an enhanced grant frame from the AP. The enhanced grant frame may include an antenna configuration and a multi-channel allocation to enable the STA to perform the MIMO transmission and the multi-channel transmission. ## Claims ### Claim 1 A method for use in a station (STA), the method comprising: receiving, from an access point (AP), a poll frame that indicates a response offset after an end of the poll frame; transmitting, in response to the poll frame, based on the response offset, a service period request (SPR) frame that includes a multi-channel control field indicating support for multi-channel transmission; and receiving, from the AP, a grant frame that includes a multi-channel allocation to enable the STA to perform a multiple-input and multiple-output (MIMO), multi-channel transmission. ### Claim 2 (depends on 1) The method of claim 1, wherein the SPR frame further includes a MIMO control field indicating support for MIMO transmission, wherein the MIMO control field includes a number of data streams subfield that indicates a number of data streams to be transmitted in the MIMO transmission. ### Claim 3 (depends on 1) The method of claim 1, wherein the multi-channel control field further includes a channel aggregation subfield that indicates support for channel aggregation or channel bonding in the multi-channel transmission. ### Claim 4 (depends on 1) The method of claim 1, wherein the grant frame further includes a multi-user MIMO control field, a single-user MIMO control field, and a dynamic allocation information field. ### Claim 5 (depends on 1) The method of claim 1, wherein the poll frame further comprises channel information, antenna information and sector information. ### Claim 6 (depends on 5) The method of claim 5, wherein the SPR frame is carried in a physical layer (PHY) protocol data unit (PPDU) transmitted with single or multiple data streams based on a channel offset indicated in the channel information. ### Claim 7 (depends on 6) The method of claim 6, wherein the PPDU is transmitted using a Quasi-Omni direction or a beamformed direction based on antenna and sector settings indicated in the antenna information or the sector information. ### Claim 8 (depends on 1) The method of claim 1, wherein the grant frame further comprises a legacy grant frame and a control trailer appended to the legacy grant frame. ### Claim 9 (depends on 8) The method of claim 8, wherein the multi-channel allocation is carried in the control trailer. ### Claim 10 A station (STA) comprising: a processor; a receiver; and a transmitter, the processor and the receiver configured to receive, from an access point (AP), a poll frame that indicates a response offset after an end of the poll frame; the processor and the transmitter configured to transmit, in response to the poll frame, based on the response offset, a service period request (SPR) frame that includes a multi-channel control field indicating support for multi-channel transmission; and the processor and the receiver configured to receive, from the AP, a grant frame that includes a multi-channel allocation to enable the STA to perform a multiple-input and multiple-output (MIMO), multi-channel transmission. ### Claim 11 (depends on 10) The STA of claim 10, wherein the SPR frame further includes a MIMO control field indicating support for MIMO transmission, wherein the MIMO control field includes a number of data streams subfield that indicates a number of data streams to be transmitted in the MIMO transmission. ### Claim 12 (depends on 10) The STA of claim 10, wherein the multi-channel control field further includes a channel aggregation subfield that indicates support for channel aggregation or channel bonding in the multi-channel transmission. ### Claim 13 (depends on 10) The STA of claim 10, wherein the grant frame further includes a multi-user MIMO control field, a single-user MIMO control field, and a dynamic allocation information field. ### Claim 14 (depends on 10) The STA of claim 10, wherein the poll frame further comprises channel information, antenna information and sector information. ### Claim 15 (depends on 14) The STA of claim 14, wherein the SPR frame is carried in a physical layer (PHY) protocol data unit (PPDU) transmitted with single or multiple data streams based on a channel offset indicated in the channel information. ### Claim 16 (depends on 15) The STA of claim 15, wherein the PPDU is transmitted using a Quasi-Omni direction or a beamformed direction based on antenna and sector settings indicated in the antenna information or the sector information. ### Claim 17 (depends on 10) The STA of claim 10, wherein the grant frame further comprises a legacy grant frame and a control trailer appended to the legacy grant frame. ### Claim 18 (depends on 17) The STA of claim 17, wherein the multi-channel allocation is carried in the control trailer. ### Claim 19 (depends on 10) The STA of claim 10, wherein the response offset is a time period beginning an interframe space after the end of the poll frame. ### Claim 20 (depends on 19) The STA of claim 19, wherein the interframe space is a short interframe space (SIFS).