# US 9,439,219 B2 · Medium accessing mechanisms within multiple user, multiple access, and/or MIMO wireless communications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,439,219 B2 - Document ID: US9439219B2 - Status: Granted - Kind: B2 - Application number: 13/893,298 - Filed: 2013-05-13 - Published: 2013-10-10 - Granted: 2016-09-06 - Earliest claimed: 2009-06-05 - Assignees: Broadcom Corporation - Applicants: Broadcom Corporation - Inventors: Peiman Amini; Matthew James Fischer; Vinko Erceg; Joseph Paul Lauer; Joonsuk Kim - Web page: https://patentgrep.com/patent/US9439219B2 ## CPC - H04W 74/04: Scheduled access (hybrid access H04W74/02) - H04L 12/413: with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD] - H04W 74/002: {Transmission of channel access control information} - 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 A multi-user super-frame (MU-SF), as controlled by a MU-SF owner, is used to govern the manner by which various wireless communication devices have access to the communication medium. When various wireless communication devices operate within a wireless communication system, communication medium access can be handled differently for wireless communication devices having different capabilities. Per the MU-SF, those having a first capability may get medium access in accordance with a first operational mode (e.g., carrier sense multiple access/collision avoidance (CSMA/CA)), while those having a second capability may get medium access in accordance with a second operational mode (e.g., scheduled access). The respective durations for each of the first operational mode and the second operational mode within various MU-SFs need not be the same; the respective durations thereof may be adaptively modified based on any number considerations. ## Claims ### Claim 1 A wireless communication device comprising: a processor configured to generate a multi-user super-frame (MU-SF) to indicate a contention free period associated with a first at least one cluster and a contention based period associated with a second at least one cluster that includes at least one other cluster that is different than the first at least one cluster to govern communication medium access by a plurality of wireless communication devices that is located remotely from the wireless communication device; and at least one wireless communication interface configured to transmit the MU-SF to and support subsequent communications with the plurality of wireless communication devices based on the MU-SF, wherein at least one of: based on the first at least one cluster, the wireless communication device is further configured to receive a first signal from a first of the plurality of wireless communication devices using a first mapping of orthogonal frequency division multiplexing (OFDM) tones within a first at least one channel within a first at least one frequency band to receive a second signal from a second of the plurality of wireless communication devices using a second mapping of OFDM tones within a second at least one channel within a second at least one frequency band; or the processor is further configured to generate at least one additional MU-SF based on communications received from at least some of the plurality of wireless communication devices during a time period governed by the MU-SF, the at least one wireless communication interface is further configured to transmit the at least one additional MU-SF to and support subsequent communications with the plurality of wireless communication devices based on the at least one additional MU-SF. ### Claim 2 (depends on 1) The wireless communication device of claim 1, wherein the processor is further configured to provide another mapping of orthogonal frequency division multiplexing (OFDM) tones within at least one channel within at least one frequency band for the first at least one cluster. ### Claim 3 (depends on 1) The wireless communication device of claim 1 further comprising: a base station (BS) or access point (AP), wherein the plurality of wireless communication devices includes at least one of a laptop host computer, a personal digital assistant, a personal computer host, or a cellular telephone. ### Claim 4 (depends on 1) The wireless communication device of claim 1, wherein the at least one wireless communication interface is further configured to transmit the MU-SF as a multi-user multiple input multiple output (MU-MIMO) frame or an orthogonal frequency division multiple access (OFDMA) frame. ### Claim 5 (depends on 1) The wireless communication device of claim 1, wherein the plurality of wireless communication devices includes a first wireless communication device operative based on a first IEEE 802.11 standard and a second wireless communication device operative based on a second IEEE 802.11 standard that is a legacy IEEE 802.11 standard to the first IEEE 802.11 standard. ### Claim 6 (depends on 1) The wireless communication device of claim 1, wherein the at least one wireless communication interface is further configured to transmit the MU-SF as part of a beacon or a probe response. ### Claim 7 (depends on 1) The wireless communication device of claim 1, wherein the second at least one cluster includes the first at least one cluster; and the wireless communication device is further configured to receive communications via the first at least one cluster during both the contention free period and the contention based period. ### Claim 8 (depends on 1) The wireless communication device of claim 1 further comprising: an access point (AP), wherein the plurality of wireless communication devices includes a wireless station (STA). ### Claim 9 A wireless communication device comprising: a processor configured to generate a multi-user super-frame (MU-SF) to indicate a contention free period associated with a first at least one cluster and a contention based period associated with a second at least one cluster that includes the first at least one cluster and also includes at least one other cluster that is different than the first at least one cluster to govern communication medium access by a plurality of wireless communication devices that is located remotely from the wireless communication device; and at least one wireless communication interface configured to transmit the MU-SF to the plurality of wireless communication devices, as a multi-user multiple input multiple output (MU-MIMO) frame or an orthogonal frequency division multiple access (OFDMA) frame, and to support subsequent communications with the plurality of wireless communication devices based on the MU-SF, wherein at least one of: the processor is further configured to provide a first mapping of orthogonal frequency division multiplexing (OFDM) tones within a first at least one channel within a first at least one frequency band for the first at least one cluster and a second mapping of OFDM tones within a second at least one channel within a second at least one frequency band for the second at least one cluster; or the processor is further configured to generate at least one additional MU-SF based on communications received from at least some of the plurality of wireless communication devices during a time period governed by the MU-SF, and the at least one wireless communication interface is further configured to transmit the at least one additional MU-SF to and support subsequent communications with the plurality of wireless communication devices based on the at least one additional MU-SF. ### Claim 10 (depends on 9) The wireless communication device of claim 9 further comprising: a base station (BS) or access point (AP), wherein the plurality of wireless communication devices includes at least one of a laptop host computer, a personal digital assistant, a personal computer host, or a cellular telephone. ### Claim 11 (depends on 9) The wireless communication device of claim 9, wherein the plurality of wireless communication devices includes a first wireless communication device operative based on a first IEEE 802.11 standard and a second wireless communication device operative based on a second IEEE 802.11 standard that is a legacy IEEE 802.11 standard to the first IEEE 802.11 standard. ### Claim 12 (depends on 9) The wireless communication device of claim 9, wherein the at least one wireless communication interface is further configured to transmit the MU-SF as part of a beacon or a probe response. ### Claim 13 (depends on 1) The wireless communication device of claim 1 further comprising: an access point (AP), wherein the plurality of wireless communication devices includes a wireless station (STA). ### Claim 14 A method for operating a wireless communication device, the method comprising: generating a multi-user super-frame (MU-SF) to indicate a contention free period associated with a first at least one cluster and a contention based period associated with a second at least one cluster that includes at least one other cluster that is different than the first at least one cluster to govern communication medium access by a plurality of wireless communication devices that is located remotely from the wireless communication device; and via at least one wireless communication interface of the wireless communication device: transmitting the MU-SF to the plurality of wireless communication devices; and receiving subsequent communications from at least some of the plurality of wireless communication devices based on the MU-SF, MU-SF, and further comprising at least one of: via the at least one wireless communication interface of the wireless communication device and based on the first at least one cluster, receiving a first signal from a first of the plurality of wireless communication devices using a first mapping of orthogonal frequency division multiplexing (OFDM) tones within a first at least one channel within a first at least one frequency band and receiving a second signal from a second of the plurality of wireless communication devices using a second mapping of OFDM tones within a second at least one channel within a second at least one frequency band; or generating at least one additional MU-SF based on communications received from at least some of the plurality of wireless communication devices during a time period governed by the MU-SF, transmitting the at least one additional MU-SF to the plurality of wireless communication devices via the at least one wireless communication interface of the wireless communication device, and supporting subsequent communications with the plurality of wireless communication devices based on the at least one additional MU-SF via the at least one wireless communication interface of the wireless communication device. ### Claim 15 (depends on 14) The method of claim 14, wherein the generating the MU-SF further comprising providing another mapping of orthogonal frequency division multiplexing (OFDM) tones within at least one channel within at least one frequency band for the first at least one cluster. ### Claim 16 (depends on 14) The method of claim 14, wherein the wireless communication device includes a base station (BS) or access point (AP), wherein the plurality of wireless communication devices includes at least one of a laptop host computer, a personal digital assistant, a personal computer host, or a cellular telephone. ### Claim 17 (depends on 14) The method of claim 14 further comprising, via the at least one wireless communication interface of the wireless communication device, transmitting the MU-SF as a multi-user multiple input multiple output (MU-MIMO) frame or an orthogonal frequency division multiple access (OFDMA) frame. ### Claim 18 (depends on 14) The method of claim 14, wherein the plurality of wireless communication devices includes a first wireless communication device operative based on a first IEEE 802.11 standard and a second wireless communication device operative based on a second IEEE 802.11 standard that is a legacy IEEE 802.11 standard to the first IEEE 802.11 standard. ### Claim 19 (depends on 14) The method of claim 14 further comprising, via the at least one wireless communication interface, transmitting the MU-SF as part of a beacon or a probe response. ### Claim 20 (depends on 14) The method of claim 14, wherein the wireless communication device is an access point (AP), and the plurality of wireless communication devices includes a wireless station (STA).