US 10,368,369 B2
Alternation between communication using CSMA/CA and OFDMA
Leif Wilhelmsson, Dalby (SE); and Thomas Nilsson, Malmo (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (publ), Stockholm (SE)
Appl. No. 15/735,239
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Jun. 11, 2015, PCT No. PCT/EP2015/063037
§ 371(c)(1), (2) Date Dec. 11, 2017,
PCT Pub. No. WO2016/198105, PCT Pub. Date Dec. 15, 2016.
Prior Publication US 2018/0184449 A1, Jun. 28, 2018
Int. Cl. H04W 74/02 (2009.01); H04W 72/04 (2009.01); H04W 74/00 (2009.01); H04W 72/12 (2009.01); H04W 74/08 (2009.01); H04W 88/10 (2009.01)
CPC H04W 74/02 (2013.01) [H04W 72/0453 (2013.01); H04W 72/1215 (2013.01); H04W 74/006 (2013.01); H04W 74/0816 (2013.01); H04W 88/10 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method for an access point of a wireless communication network, the method comprising:
the access point alternating between communication using orthogonal frequency division multiple access (OFDMA) and communication using carrier sense multiple access with collision avoidance (CSMA/CA); and
during communication using OFDMA, alternating between uplink communication and downlink communication, wherein
each time period between an end of uplink communication and a start of downlink communication has a duration that is smaller than a time period threshold,
each time period between an end of downlink communication and a start of uplink communication has a duration that is smaller than the time period threshold, and
the time period threshold is smaller than or equal to a minimum time period required for any of a plurality of second wireless communication devices to acquire access to communication with the access point using CSMA/CA,
wherein the access point is configured to use a communication channel resource to communicate with a plurality of first wireless communication devices using OFDMA and to communicate with the plurality of second wireless communication devices using CSMA/CA, wherein the communication channel resource comprises a bandwidth of frequencies dividable into a plurality of sub-carriers for OFDMA.