# US 2020/0288396 A1 · Method and device for transmitting wakeup packet in wireless lan system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0288396 A1 - Document ID: US20200288396A1 - Status: Published application - Kind: A1 - Application number: 16/645,446 - Filed: 2018-08-20 - Published: 2020-09-10 - Earliest claimed: 2017-09-07 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Eunsung PARK; Jinyoung CHUN; Dongguk LIM; Jinsoo CHOI - Web page: https://patentgrep.com/patent/US20200288396A1 ## CPC - H04W 52/0229: {where the received signal is a wanted signal} - H04L 27/02: Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation (H04L27/32 takes precedence) - H04L 27/26: Systems using multi-frequency codes (H04L27/32 takes precedence) - H04W 52/02: Power saving arrangements - H04W 84/12: WLAN [Wireless Local Area Networks] - 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 Presented are a method and device for transmitting a wakeup packet in a wireless LAN system. Specifically, the transmission device configures a first wakeup packet having a first data rate by using a first sync field, and a second wakeup packet having a second data rate by using a second sync field. The transmission device transmits the first and second wakeup packets to a receiving device. Here, an OOK scheme is applied to the first and second wakeup packets to configure the first and second wakeup packets as an ON signal or an OFF signal. The first sync field includes a first sequence, and the second sync field includes a second sequence which is a complementary sequence to the first sequence. The number of coefficient 1 and coefficient 0 included in the first sequence is the same. The first and second sequences have a 32 bit length, and each bit of the first and second sequences has a duration of 2 μs. ## Claims ### Claim 1 A method for transmitting a wake-up packet in a wireless LAN system, the method comprising: configuring, by a transmitting device, a first wake-up packet having a first data rate based on a first sync field and a second wake-up packet having a second data rate based on a second sync field; and transmitting, by the transmitting device, the first and second wake-up packets to a receiving device, wherein the first and second wake-up packets are configured as an on signal or an off signal by applying an On-Off Keying (OOK) method, wherein the first sync field includes a first sequence, wherein the second sync field includes a second sequence being a complementary sequence of the first sequence, wherein a number of coefficients 1 and a number of coefficients 0 included in the first sequence are the same, wherein the first and second sequences have a length of 32 bits, and wherein each bit of the first and second sequences have a duration of 2 us. ### Claim 2 (depends on 1) The method of claim 1, wherein a first data rate is 62.5 Kbps, and wherein a second data rate is 250 Kbps. ### Claim 3 (depends on 1) The method of claim 1, wherein the first sequence is [1 0 1 0 0 1 0 0 1 0 1 1 1 0 1 1 0 0 0 1 0 1 1 1 0 0 1 1 1 0 0 0], and wherein the second sequence is [0 1 0 1 1 0 1 1 0 1 0 0 0 1 0 0 1 1 1 0 1 0 0 0 1 1 0 0 0 1 1 1]. ### Claim 4 (depends on 3) The method of claim 3, wherein the first sync field is included in a preamble of the first wake-up packet, wherein the first sync field includes a sequence configured of the first sequence being repeated 2 times, and wherein the first sync field has a duration of 128 us. ### Claim 5 (depends on 4) The method of claim 4, wherein a length of a preamble of the first wake-up packet is determined based on the first data rate. ### Claim 6 (depends on 3) The method of claim 3, wherein the second sync field is included in a preamble of the second wake-up packet, and wherein the second sync field has a duration of 64 us. ### Claim 7 (depends on 6) The method of claim 6, wherein a length of a preamble of the second wake-up packet is determined based on the second data rate. ### Claim 8 (depends on 1) The method of claim 1, wherein a number of coefficients 1 and a number of coefficients 0 included in the second sequence are the same. ### Claim 9 (depends on 1) The method of claim 1, wherein the first sequence is [1 0 1 1 0 0 0 0 1 1 1 0 0 1 1 0 1 0 1 1 1 1 0 1 0 0 0 1 0], and wherein the second sequence is [0 1 0 0 1 1 1 1 0 0 0 1 1 0 0 1 0 1 0 0 0 0 1 0 1 1 1 0 1 1 0 1]. ### Claim 10 (depends on 1) The method of claim 1, wherein the first sequence is [1 0 1 1 0 0 1 1 1 0 0 0 0 1 1 0 1 0 1 0 0 1 0 0 0 1 0 1 1 1], and wherein the second sequence is [0 1 0 0 1 1 0 0 0 1 1 1 1 0 0 1 0 1 0 1 1 0 1 1 1 0 1 0 1 0 0 0]. ### Claim 11 (depends on 1) The method of claim 1, wherein the on signal or the off signal is generated by applying a third sequence to 13 consecutive subcarriers in a 20 MHz band and by performing 64-point Inverse Fast Fourier Transform (IFFT). ### Claim 12 A transmitting device for transmitting a wake-up packet in a wireless LAN system, the transmitting device comprising: a transceiver transmitting or receiving radio signals; and a processor controlling the transceiver, wherein the processor is configured to: configure a first wake-up packet having a first data rate based on a first sync field and a second wake-up packet having a second data rate based on a second sync field, and transmit the first and second wake-up packets to a receiving device, wherein the first and second wake-up packets are configured as an on signal or an off signal by applying an On-Off Keying (OOK) method, wherein the first sync field includes a first sequence, wherein the second sync field includes a second sequence being a complementary sequence of the first sequence, wherein a number of coefficients 1 and a number of coefficients 0 included in the first sequence are the same, wherein the first and second sequences have a length of 32 bits, and wherein each bit of the first and second sequences have a duration of 2 us. ### Claim 13 (depends on 12) The transmitting device of claim 12, wherein a first data rate is 62.5 Kbps, and wherein a second data rate is 250 Kbps. ### Claim 14 (depends on 12) The transmitting device of claim 12, wherein the first sequence is [1 0 1 0 0 1 0 0 1 0 1 1 1 0 1 1 0 0 0 1 0 1 1 1 0 0 0 1 1 1 0 0 0],and wherein the second sequence is [0 1 0 1 1 0 1 1 0 1 0 0 0 1 0 0 1 1 1 0 1 0 0 0 1 1 0 0 0 1 1 1]. ### Claim 15 (depends on 14) The transmitting device of claim 14, wherein the first sync field is included in a preamble of the first wake-up packet, wherein the first sync field includes a sequence configured of the first sequence being repeated 2 times, and wherein the first sync field has a duration of 128 us. ### Claim 16 (depends on 14) The transmitting device of claim 14, wherein the second sync field is included in a preamble of the second wake-up packet, and wherein the second sync field has a duration of 64 us.