A method for wireless communication at a device, comprising: identifying (1205; 1305; 1405, 1530; 1605), a plurality of counters used to contend for access to a plurality of channels of a contention-based radio frequency spectrum band, each of the plurality of counters associated with a respective channel of the plurality of channels of the contention-based radio frequency spectrum band; performing (1215; 1310; 1410; 1510; 1610) respective extended clear channel assessment, eCCA, procedures to contend for access to each channel of the plurality of channels at a same time, each eCCA procedure based at least in part on a respective counter of the plurality of counters, each eCCA procedure including: initializing the value of the respective counter to a random number; measuring (1220; 1315; 1415) the respective channel during a time interval; detecting, based on the measuring, an energy on the respective channel during each of a plurality of CCA slots; decrementing the value of the respective counter when the energy detected during a CCA slot is within an energy threshold; maintaining the value of the respective counter when the energy detected during a CCA slot exceeds the energy threshold; and identifying the respective channel as clear for use when the respective counter reaches a final count; and characterized in that performing the respective eCCA procedures further comprises desynchronizing (1225; 1325) the plurality of counters when the measuring indicates a channel energy above an energy threshold on each of the plurality of channels during the time interval, comprising splitting the plurality of counters into a first group of counters and a second group of counters and adjusting the value of the counters of one of the first group of counters and the second group of counters to a new value. identifying (1205; 1305; 1405, 1530; 1605), a plurality of counters used to contend for access to a plurality of channels of a contention-based radio frequency spectrum band, each of the plurality of counters associated with a respective channel of the plurality of channels of the contention-based radio frequency spectrum band; performing (1215; 1310; 1410; 1510; 1610) respective extended clear channel assessment, eCCA, procedures to contend for access to each channel of the plurality of channels at a same time, each eCCA procedure based at least in part on a respective counter of the plurality of counters, each eCCA procedure including: initializing the value of the respective counter to a random number; measuring (1220; 1315; 1415) the respective channel during a time interval; detecting, based on the measuring, an energy on the respective channel during each of a plurality of CCA slots; decrementing the value of the respective counter when the energy detected during a CCA slot is within an energy threshold; maintaining the value of the respective counter when the energy detected during a CCA slot exceeds the energy threshold; and identifying the respective channel as clear for use when the respective counter reaches a final count; initializing the value of the respective counter to a random number; measuring (1220; 1315; 1415) the respective channel during a time interval; detecting, based on the measuring, an energy on the respective channel during each of a plurality of CCA slots; decrementing the value of the respective counter when the energy detected during a CCA slot is within an energy threshold; maintaining the value of the respective counter when the energy detected during a CCA slot exceeds the energy threshold; and identifying the respective channel as clear for use when the respective counter reaches a final count; and characterized in that performing the respective eCCA procedures further comprises desynchronizing (1225; 1325) the plurality of counters when the measuring indicates a channel energy above an energy threshold on each of the plurality of channels during the time interval, comprising splitting the plurality of counters into a first group of counters and a second group of counters and adjusting the value of the counters of one of the first group of counters and the second group of counters to a new value.