SK Telecom has been granted a patent for a wireless LAN signaling method for multi-user transmission. The method involves generating a frame with signal fields indicating bandwidth and resource allocation information, and transmitting the frame using a wireless communication terminal. The patent also covers a station that can receive a preamble and data from an access point, with the ability to identify resource allocation information based on the transmission mode. GlobalData’s report on SK Telecom gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on SK Telecom, Cloud gaming was a key innovation area identified from patents. SK Telecom's grant share as of September 2023 was 34%. Grant share is based on the ratio of number of grants to total number of patents.
Signaling method for wireless lan frame with multi-user transmission
A recently granted patent (Publication Number: US11777693B2) describes a station (STA) and a wireless communication method for receiving and processing data in a wireless communication system. The station includes a transceiver and a processor. The processor is configured to receive a preamble of a Physical layer Protocol Data Unit (PPDU) from an access point (AP). The preamble includes a High Efficiency Signal A (HE-SIG-A) field and a High Efficiency Signal B (HE-SIG-B) field. The presence or absence of a resource allocation field in the HE-SIG-B field is identified based on whether Orthogonal Frequency Division Multiple Access (OFDMA) is applied during multi-user (MU) transmission. The processor also receives the data of the PPDU from the AP.
The patent claims specify various aspects of the station and the wireless communication method. Claim 2 states that the HE-SIG-B field does not include the resource allocation field when OFDMA is not applied. Claim 3 states that the HE-SIG-B field includes the resource allocation field when OFDMA is applied. Claim 4 states that the HE-SIG-A field includes a predetermined field indicating whether OFDMA is not applied during MU transmission. Claim 5 states that the HE-SIG-A field includes a bandwidth field indicating the total bandwidth in which the frame is transmitted. Claim 6 states that the HE-SIG-B field further includes one or more user fields indicating information of terminals allocated to each resource unit in the frequency band. Claim 7 states that the user fields sequentially indicate information of the terminals allocated to each resource unit. Claim 8 states that the information of the resource units includes their sizes and arrangement in the frequency band. Claim 9 states that the user field includes identifier information of a terminal allocated to a resource unit and the number of streams information. Claim 10 states that when the frequency band is divided into subbands, it includes a combination of resource units with different sizes.
Overall, this patent describes a station and a wireless communication method that efficiently processes data in a wireless communication system. The use of different fields in the HE-SIG-A and HE-SIG-B fields allows for the identification of resource allocation information and other relevant details during multi-user transmission. This technology has the potential to improve the performance and efficiency of wireless communication systems.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
