An apparatus of an access point, the apparatus comprising a memory and processing circuitry, the processing circuitry configured to: determine an assignment of an associated station to one or more groups and a corresponding user position for each of the one or more groups, wherein each of the one or more groups comprises one or more associated stations and is associated with a group identifier, ID; encode a group ID management frame to transmit the assignment, wherein the group ID management frame comprises an address of the associated station, and wherein the group ID management frame comprises a membership status array, wherein the membership status array is an array of bits with each bit indicating whether the associated station is a member of the group of the one or more groups with the group ID equal to a first index of the array of bits corresponding to the position of said each bit in the array of bits, and wherein the group ID management frame further comprises a user position array with an indication of the user position for each corresponding group of the one or more groups to indicate a user position of the associated station in each corresponding group of the one or more groups, wherein if the membership status array indicates the associated station is a member of a corresponding group of the one or more groups, a two bits of the user position array indicates the user position for the corresponding group of the one or more groups, wherein the membership status array is a fixed length of eight octets and the user position array is a fixed length of sixteen octets; and configure the access point to transmit the group ID management frame to the associated station. determine an assignment of an associated station to one or more groups and a corresponding user position for each of the one or more groups, wherein each of the one or more groups comprises one or more associated stations and is associated with a group identifier, ID; encode a group ID management frame to transmit the assignment, wherein the group ID management frame comprises an address of the associated station, and wherein the group ID management frame comprises a membership status array, wherein the membership status array is an array of bits with each bit indicating whether the associated station is a member of the group of the one or more groups with the group ID equal to a first index of the array of bits corresponding to the position of said each bit in the array of bits, and wherein the group ID management frame further comprises a user position array with an indication of the user position for each corresponding group of the one or more groups to indicate a user position of the associated station in each corresponding group of the one or more groups, wherein if the membership status array indicates the associated station is a member of a corresponding group of the one or more groups, a two bits of the user position array indicates the user position for the corresponding group of the one or more groups, wherein the membership status array is a fixed length of eight octets and the user position array is a fixed length of sixteen octets; and configure the access point to transmit the group ID management frame to the associated station.