# US 12,114,267 B2 · Systems and methods of using restricted target wake time in wireless communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,114,267 B2 - Document ID: US12114267B2 - Status: Granted - Kind: B2 - Application number: 17/679,909 - Filed: 2022-02-24 - Published: 2024-03-21 - Granted: 2024-10-08 - Earliest claimed: 2021-03-24 - Assignees: Meta Platforms Technologies, LLC - Applicants: Meta Platforms Technologies, LLC - Inventors: Chunyu Hu; Muhammad Kumail Haider - Web page: https://patentgrep.com/patent/US12114267B2 ## CPC - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04W 52/0248: {dependent on the time of the day, e.g. according to expected transmission activity} - H04L 47/2416: Real-time traffic - H04L 47/2483: involving identification of individual flows - H04L 47/28: in relation to timing considerations - H04L 65/612: for unicast - H04L 65/70: Media network packetisation - H04L 65/80: Responding to QoS - H04W 28/0273: {adapting protocols for flow control or congestion control to wireless environment, e.g. adapting transmission control protocol [TCP] (wireless network protocols or protocol adaptations to wireless operation, e.g. wireless application protocol H04W80/00)} - H04W 52/0254: {detecting a user operation or a tactile contact or a motion of the device} - H04W 84/12: WLAN [Wireless Local Area Networks] - H04W 88/04: adapted for relaying to or from another terminal or user - 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) - 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 Disclosed herein are systems and methods related to using restricted target wake time in wireless communication. In one aspect, a first wireless communication device may configure a first field indicating (i) one or more traffic streams that are latency sensitive, and (ii) a direction of each of the one or more traffic streams between the first wireless communication device and a second wireless communication device. Each of the one or more traffic streams is to be communicated during a respective service period of a restricted target wake time (rTWT) schedule. The first wireless communication device may send a message including the first field to a second wireless communication device. ## Claims ### Claim 1 A method comprising: generating, by a first wireless communication device, a message including a first field indicating (i) one or more traffic streams that are latency sensitive, and (ii) a direction of each of the one or more traffic streams between the first wireless communication device and a second wireless communication device, each of the one or more traffic streams to be communicated during a respective service period of a restricted target wake time (rTWT) schedule; and sending, by the first wireless communication device to the second wireless communication device, the message including the first field, wherein the first field includes a first bitmap indicating one or more traffic identifiers that correspond to one or more latency sensitive traffic streams in a first communication direction from the first wireless communication device to the second wireless communication device, and a second bitmap indicating one or more traffic identifiers that correspond to one or more latency sensitive traffic streams in a second communication direction from the second wireless communication device to the first wireless communication device. ### Claim 2 (depends on 1) The method of claim 1, wherein the message includes a second field that is set to a predefined value to indicate that the first field is included in the message. ### Claim 3 (depends on 1) The method of claim 1, wherein the first field is for use by the first wireless communication device and the second wireless communication device to negotiate membership in the rTWT schedule. ### Claim 4 (depends on 1) The method of claim 1, wherein a subfield in the first field indicates whether one or more additional subfields in the first field include valid information. ### Claim 5 (depends on 4) The method of claim 4, wherein the subfield comprises a valid indicator bit corresponding to a subfield of the one or more additional subfields. ### Claim 6 (depends on 1) The method of claim 1, wherein a subfield in the field comprises a traffic specification element describing one or more characteristics of a first traffic stream of the one or more traffic streams. ### Claim 7 (depends on 1) The method of claim 1, wherein the first field indicates a use of peer-to-peer communication. ### Claim 8 A first wireless communication device comprising: at least one processor configured to generate a message including a first field indicating (i) one or more traffic streams that are latency sensitive, and (ii) a direction of each of the one or more traffic streams between the first wireless communication device and a second wireless communication device, each of the one or more traffic streams to be communicated during a respective service period of a restricted target wake time (rTWT) schedule; and a transceiver configured to send the message including the first field to the second wireless communication device, wherein the first field includes a first bitmap indicating one or more traffic identifiers that correspond to one or more latency sensitive traffic streams in a first communication direction from the first wireless communication device to the second wireless communication device, and a second bitmap indicating one or more traffic identifiers that correspond to one or more latency sensitive traffic streams in a second communication direction from the second wireless communication device to the first wireless communication device. ### Claim 9 (depends on 8) The first wireless communication device of claim 8, wherein the message includes a second field that is set to a predefined value to indicate that the first field is included in the message. ### Claim 10 (depends on 8) The first wireless communication device of claim 8, wherein the first field is for use by the first wireless communication device and the second wireless communication device to negotiate membership in the rTWT schedule. ### Claim 11 (depends on 8) The first wireless communication device of claim 8, wherein a subfield in the first field indicates whether one or more additional subfields in the first field include valid information. ### Claim 12 (depends on 11) The first wireless communication device of claim 11, wherein the subfield comprises a valid indicator bit corresponding to a subfield of the one or more additional subfields. ### Claim 13 (depends on 8) The first wireless communication device of claim 8, wherein a subfield in the field comprises a traffic specification element describing one or more characteristics of a first traffic stream of the one or more traffic streams. ### Claim 14 (depends on 8) The first wireless communication device of claim 8, wherein the first field indicates a use of peer-to-peer communication. ### Claim 15 A method comprising: receiving, by a second wireless communication device from a first wireless communication device, a message including a first field, wherein the first field is configured to indicate (i) one or more traffic streams that are latency sensitive, and (ii) a direction of each of the one or more traffic streams between the first wireless communication device and a second wireless communication device, each of the one or more traffic streams to be communicated during a respective service period of a restricted target wake time (rTWT) schedule, wherein the first field includes a first bitmap indicating one or more traffic identifiers that correspond to one or more latency sensitive traffic streams in a first communication direction from the first wireless communication device to the second wireless communication device, and a second bitmap indicating one or more traffic identifiers that correspond to one or more latency sensitive traffic streams in a second communication direction from the second wireless communication device to the first wireless communication device. ### Claim 16 (depends on 15) The method of claim 15, wherein the message includes a second field that is set to a predefined value to indicate that the first field is included in the message.