Abstract: A wireless communication device for communicating across a wireless communication channel includes one or more processors configured to determine whether a further device is generating a radio frequency interference at an operating frequency; transmit a request message to the further device requesting the further device vacate the operating frequency based on the determination that the further device is generating radio frequency interference; receive a response message from the further device; and generate an instruction based on the response message.

Abstract: A wireless communication device for communicating across a wireless communication channel includes one or more processors configured to determine whether a further device is generating a radio frequency interference at an operating frequency; transmit a request message to the further device requesting the further device vacate the operating frequency based on the determination that the further device is generating radio frequency interference; receive a response message from the further device; and generate an instruction based on the response message.

Abstract: Method for efficient use of meal vouchers comprising issuing a unique meal voucher having a per diem value and preset use criteria, verifying voucher validity for use under at least one preset criterion, and, if the preset criterion is satisfied, allowing the use of the voucher. Use criteria may include a day and time limitation on voucher use, redemption of the voucher for goods other than a meal and/or accumulation of the voucher per diem value to a preset sum and/or over a preset period. A system implementing the method includes a dedicated server running applications which enable interaction between employers, employees, meal and non-meal suppliers and non-employee users for issue, distribution and efficient use of meal vouchers which can also be redeemed for goods other than meals and/or have their per diem value accumulated before redemption.