Patent ID: 9332484
Filing Date: 2016-05-03
CPC Classification: H04W

Claim Text:
1. A method for a first station (STA) to operate as an unlicensed device which is permitted to operate on an available channel within a White Space (WS) band of a wireless system, the method comprising: receiving a message indicating whether a White Space Map (WSM) of the first STA is valid from a second STA, wherein the available channel is a channel not used by a licensed device and allowed for operation by a unlicensed device, wherein the message includes a Map ID of a current WSM; determining whether an existing WSM of the first STA is valid by comparing a Map ID of the WSM of the first STA with the Map ID included in the received message, wherein the Map ID, included in the received message, includes a Map version indicating a version of the WSM, and wherein a value of the Map version increases by one whenever the WSM is updated; and requesting the second STA to transmit a valid WSM, if the Map ID of the existing WSM of the first STA is different from the Map ID included in the received message.