# US 2013/0155976 A1 · System and Method for Multiple Channel Bandwidth Modes Coexistence > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0155976 A1 - Document ID: US20130155976A1 - Status: Published application - Kind: A1 - Application number: 13/717,618 - Filed: 2012-12-17 - Published: 2013-06-20 - Earliest claimed: 2011-12-16 - Assignees: Futurewei Technologies, Inc. - Inventors: Bin Chen; George Calcev; Lin Cai; Lukasz Krzymien - Web page: https://patentgrep.com/patent/US20130155976A1 ## CPC - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 72/51: based on terminal or device properties - H04W 28/20: Negotiating bandwidth - H04W 84/12: WLAN [Wireless Local Area Networks] - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method for transmitting a transmission to a station in a wireless network includes transmitting a preamble of the transmission to the station using a first channel with a first bandwidth, the preamble including a first indicator indicating a second channel with a second bandwidth, the second bandwidth greater than the first bandwidth, and transmitting a data portion of the transmission to the station using the second channel with the second bandwidth. ## Claims ### Claim 1 A method for transmitting a transmission to a station in a wireless network, the method comprising: transmitting, by a transmitter, a preamble of the transmission to the station using a first channel with a first bandwidth, the preamble including a first indicator indicating a second channel with a second bandwidth, the second bandwidth greater than the first bandwidth; and transmitting, by the transmitter, a data portion of the transmission to the station using the second channel with the second bandwidth. ### Claim 2 (depends on 1) The method of claim 1, wherein the first bandwidth is 1 MHz, and wherein the second bandwidth is one of 2 MHz, 4 MHz, 8 MHz, and 16 MHz. ### Claim 3 (depends on 1) The method of claim 1, further comprising transmitting a training field. ### Claim 4 (depends on 3) The method of claim 3, wherein the training field is transmitted on the second channel. ### Claim 5 (depends on 1) The method of claim 1, further comprising transmitting a training field and a signal field. ### Claim 6 (depends on 5) The method of claim 5, wherein the training field and the signal field are transmitted on the second channel. ### Claim 7 (depends on 5) The method of claim 5, wherein the training field is transmitted on a first portion of the second bandwidth of the second channel, wherein the signal field is transmitted on a second portion of the second bandwidth of the second channel, and wherein the transmission of the training field and the signal field overlap in time. ### Claim 8 (depends on 1) The method of claim 1, further comprising negotiating the second bandwidth of the second channel with the station. ### Claim 9 (depends on 8) The method of claim 8, wherein negotiating the second bandwidth comprises: transmitting a request message including a second indicator of a proposed channel with a proposed bandwidth to the station; receiving a response message including a third indicator of an acceptable channel with an acceptable bandwidth from the station; and setting the second bandwidth equal to the acceptable bandwidth. ### Claim 10 (depends on 9) The method of claim 9, wherein the acceptable bandwidth is different from the proposed bandwidth, and wherein the method further comprises transmitting a self request message including a fourth indicator of the acceptable bandwidth to the station. ### Claim 11 (depends on 9) The method of claim 9, wherein the request message comprises a request to send message, and wherein the response message comprises a clear to send message. ### Claim 12 (depends on 1) The method of claim 1, wherein the preamble is transmitted in a first interval, and wherein the data portion is transmitted in a second interval. ### Claim 13 A method for receiving a transmission from a transmitter in a wireless network, the method comprising: receiving, by a station, a preamble of the transmission from the transmitter using a first channel with a first bandwidth, the preamble including a first indicator indicating a second channel with a second bandwidth, the second bandwidth greater than the first bandwidth; and receiving, by the station, a data portion from the transmitter using the second channel with the second bandwidth. ### Claim 14 (depends on 13) The method of claim 13, wherein the first bandwidth is 1 MHz, and wherein the second bandwidth is one of 2 MHz, 4 MHz, 8 MHz, and 16 MHz. ### Claim 15 (depends on 13) The method of claim 13, further comprising receiving a training field. ### Claim 16 (depends on 15) The method of claim 15, wherein the training field is received using the second channel. ### Claim 17 (depends on 13) The method of claim 13, further comprising negotiating the second bandwidth of the second channel with the transmitter. ### Claim 18 (depends on 17) The method of claim 17, wherein negotiating the second bandwidth comprises: receiving a request message including a second indicator of a proposed channel with a proposed bandwidth from the transmitter; transmitting a response message including a third indicator of an acceptable channel with an acceptable bandwidth to the transmitter; and setting the second bandwidth equal to the acceptable bandwidth. ### Claim 19 (depends on 18) The method of claim 18, wherein the acceptable bandwidth is different from the proposed bandwidth, and wherein the method further comprises receiving a self request message including a fourth indicator of the acceptable bandwidth from the transmitter. ### Claim 20 A device comprising: a transmitter configured to transmit a preamble of a transmission to a station using a first channel with a first bandwidth, the preamble including a first indicator indicating a second channel with a second bandwidth, the second bandwidth greater than the first bandwidth, and to transmit a data portion of the transmission to the station using the second channel with the second bandwidth. ### Claim 21 (depends on 20) The device of claim 20, wherein the transmitter is configured to transmit a training field on the second channel. ### Claim 22 (depends on 20) The device of claim 20, wherein the transmitter is configured to transmit a training field and a signal field on the second channel. ### Claim 23 (depends on 20) The device of claim 20, wherein the transmitter is configured to transmit a training field on a first portion of the second bandwidth of the second channel, wherein the transmitter is configured to transmit a signal field on a second portion of the second bandwidth of the second channel, and wherein the transmission of the training field and the signal field overlap in time. ### Claim 24 (depends on 20) The device of claim 20, further comprising a processor operatively coupled to the transmitter, the processor configured to negotiate the second bandwidth of the second channel with the station. ### Claim 25 (depends on 24) The device of claim 24, wherein the transmitter is configured to transmit a request message including a second indicator of a proposed channel with a proposed bandwidth to the station, wherein the device further comprises a receiver operatively coupled to the transmitter, the receiver configured to receive a response message including a third indicator of an acceptable channel with an acceptable bandwidth from the station, and wherein the processor is configured to set the second bandwidth equal to the acceptable bandwidth. ### Claim 26 A device comprises: a receiver configured to receive a preamble of a transmission from a transmitter using a first channel with a first bandwidth, the preamble including a first indicator indicating a second channel with a second bandwidth, the second bandwidth greater than the first bandwidth, and to receive a data portion from the transmitter using the second channel with the second bandwidth. ### Claim 27 (depends on 26) The device of claim 26, wherein the receiver is configured to receive a training field using the second channel. ### Claim 28 (depends on 26) The device of claim 26, wherein the receiver is configured to receive a training field and a signal field on the second channel. ### Claim 29 (depends on 26) The device of claim 26, wherein the receiver is configured to receive a training field on a first portion of the second bandwidth of the second channel, wherein the receiver is configured to receive a signal field on a second portion of the second bandwidth of the second channel, and wherein the reception of the training field and the signal field overlap in time. ### Claim 30 (depends on 26) The device of claim 26, further comprising a processor operatively coupled to the receiver, the processor configured to negotiate the second bandwidth of the second channel with the transmitter. ### Claim 31 (depends on 30) The device of claim 30, wherein the receiver is configured to receive a request message including a second indicator of a proposed channel with a proposed bandwidth from the transmitter, wherein the device further comprises a transmitter operatively coupled to the receiver, the transmitter configured to transmit a response message including a third indicator of an acceptable channel with an acceptable bandwidth to the transmitter, and wherein the processor is configured to set the second bandwidth equal to the acceptable bandwidth.