Patent ID: 7623503

Claim:
A method of transmitting an overhead message via a control channel having at least one slot, the method comprising: transmitting an overhead slot cycle index to allow a mobile station (MS) to determine an overhead slot cycle; receiving information of the overhead slot cycle determined by the MS based on a variable duration of the slot and the overhead slot cycle index, wherein the overhead slot cycle is repeatedly used; transmitting the overhead message on the first slot of each overhead slot cycle provided from the received information, wherein the first slot of each overhead slot cycle is determined by any of a first equation of ⌊ t 2 ⌋ ⁢ mod ⁢ ⁢ ( B + 1 ) = 0 wherein the variable duration of the slot is 40 ms, a second equation of ⌊ t 4 ⌋ ⁢ mod ⁢ ⁢ ( B ⁢ + ⁢ 1 ) = 0 wherein the variable duration of the slot is 80 ms, or a third equation of ⌊ t 8 ⌋ ⁢ mod ⁢ ⁢ ( B + 1 ) = 0 wherein the variable duration of the slot is 160 ms.