Patent ID: 8867474

Claim:
A method for receiving an uplink signal by a communication device in a wireless communication system, the method comprising: transmitting, by the communication device, a control channel signal including a resource allocation (RA) field; and receiving, by the communication device, an uplink signal according to the control channel signal, wherein a size of the resource allocation (RA) field in the control channel signal is represented by the following equation: Max ⁡ ( ⌈ log 2 ⁡ ( ( ⌈ N RB UL / P + 1 ⌉ 4 ) ) ⌉ , ⌈ log 2 ⁡ ( N RB UL ⁡ ( N RB UL + 1 ) / 2 ) ⌉ ) where, N RB UL is the number of uplink (UL) resource blocks (RBs), P is a size of uplink (UL) Resource Block Group (RBGs), ┌ ┐ is a ceiling function, Max(x, y) is a higher one of x and y, and ( x y ) is x ⁡ ( x - 1 ) ⁢ ⁢ … ⁢ ⁢ ( x - y + 1 ) y ⁡ ( y - 1 ) ⁢ ⁢ … ⁢ ⁢ 1 .