# US 9,438,333 B2 · WLAN apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,438,333 B2 - Document ID: US9438333B2 - Status: Granted - Kind: B2 - Application number: 14/520,704 - Filed: 2014-10-22 - Published: 2015-02-05 - Granted: 2016-09-06 - Earliest claimed: 2008-09-05 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Yong Ho Seok - Web page: https://patentgrep.com/patent/US9438333B2 ## CPC - H04B 7/2612: {Arrangements for wireless medium access control, e.g. by allocating physical layer transmission capacity (H04B7/2615 - H04B7/2643 take precedence; provision for broadband connection H04Q11/0478)} - H04L 69/22: Parsing or analysis of headers - H04W 16/26: Cell enhancers {or enhancement}, e.g. for tunnels, building shadow - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 84/12: WLAN [Wireless Local Area Networks] - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A wireless local area network (WLAN) apparatus for a WLAN system is provided that includes a first medium access protocol (MAC) entity supporting a first frequency band and a second MAC entity supporting a second frequency band, where a MAC management frame for the first frequency band is encapsulated in a MAC management frame for the second frequency band and transmitted via the second frequency band. ## Claims ### Claim 1 A device supporting multi-band in a wireless local area network, the device comprising: network interface circuitry configured to implement a Station Management Entity (SME), a first Medium Access Control (MAC) entity and a second MAC entity, wherein the SME is configured to manage multi-band operation in which the device supports more than two frequency bands; wherein the first MAC entity is configured to construct a MAC Management Protocol Data Unit (MMPDU) that is destined for a first MAC entity of a receiving device; wherein the second MAC entity is configured to generate an encapsulation management frame by encapsulating the MMPDU and to transmit the encapsulation management frame via a wireless medium, wherein the encapsulation management frame includes a first frame control field, a second frame control field and a frame body field, wherein the first frame control field includes frame control for the encapsulation management frame, wherein the second frame control field includes frame control for the MMPDU, wherein the frame body field includes a frame body of the MMPDU, and wherein the first MAC entity operates at a first frequency band and the second MAC entity operates at a second frequency band that is different from the first frequency band. ### Claim 2 (depends on 1) The device of claim 1, wherein the frame control for the encapsulation management frame is different from the frame control for the MMPDU. ### Claim 3 (depends on 1) The device of claim 1, wherein the encapsulation management frame does not include a Frame Check Sequence (FCS) field of the MMPDU. ### Claim 4 (depends on 1) The device of claim 1, wherein the encapsulation management frame further includes information used to identify the first MAC entity of the receiving device. ### Claim 5 (depends on 1) The device of claim 1, wherein the MMPDU is used to perform authentication or association between the device and the receiving device. ### Claim 6 (depends on 1) The device of claim 1, wherein the first frequency band is a 5 GHz band and the second frequency is a 60 GHz band. ### Claim 7 (depends on 1) The device of claim 1, wherein the first frequency band is a 60 GHz band and the second frequency is a 5 GHz band. ### Claim 8 A method for supporting multi-band in a wireless local area network, the method performed by a transmitting device including a Station Management Entity (SME), a first Medium Access Control (MAC) entity and a second MAC entity and comprising: constructing a MAC Management Protocol Data Unit (MMPDU) by the first MAC entity, the MMPDU destined for a first MAC entity of a receiving device; generating an encapsulation management frame by the second MAC entity by encapsulating the MMPDU; and transmitting the encapsulation management frame via a wireless medium by the second MAC entity, wherein the encapsulation management frame includes a first frame control field, a second frame control field and a frame body field, wherein the first frame control field includes frame control for the encapsulation management frame, wherein the second frame control field includes frame control for the MMPDU, wherein the frame body field includes a frame body of the MMPDU, and wherein the first MAC entity operates at a first frequency band and the second MAC entity operates at a second frequency band that is different from the first frequency band. ### Claim 9 (depends on 8) The method of claim 8, wherein the frame control for the encapsulation management frame is different from the frame control for the MMPDU. ### Claim 10 (depends on 8) The method of claim 8, wherein the encapsulation management frame does not include a Frame Check Sequence (FCS) field of the MMPDU. ### Claim 11 (depends on 8) The method of claim 8, wherein the encapsulation management frame further includes information used to identify the first MAC entity of the receiving device. ### Claim 12 (depends on 8) The method of claim 8, wherein the MMPDU is used to perform authentication or association between the transmitting device and the receiving device. ### Claim 13 (depends on 8) The method of claim 8, wherein the first frequency band is a 5 GHz band and the second frequency is a 60 GHz band. ### Claim 14 (depends on 8) The method of claim 8, wherein the first frequency band is a 60 GHz band and the second frequency is a 5 GHz band.