Patent ID: 8199709

Claim:
A method for operating an electronic device using a first and a second communication protocols, comprising: estimating a period for transmitting a trigger frame by said electronic device, a period for receiving a first acknowledgement (ACK) frame by said electronic device, a period of a backoff procedure, a period for receiving a predetermined number of delivered frames by said electronic device, and a period of transmitting a second ACK frame by said electronic device; adding all said estimated periods to be a predetermined time period; transmitting said trigger frame to initiate said electronic device to communicate in accordance with said first communication protocol; and determining whether to grant said electronic device to communicate in accordance with said second communication protocol based on said predetermined time period, wherein said electronic device is granted to communicate in accordance with said first communication protocol while not granted from communicating in accordance with said second communication protocol, wherein said electronic device is granted to communicate in accordance with said second communication protocol while not granted from communicating in accordance with said first communication protocol, and wherein the following steps before said predetermined time period is ended: checking whether said first ACK frame is received within an ACK timeout period; and enabling said electronic device to communicate in accordance with said second communication protocol if said first ACK frame is not received when said ACK timeout period is ended.