Patent ID: 9161336
Filing Date: 2015-10-13
Classification: H04L,H04W

Abstract:
1. A method for use in a mobile terminal to allocate sub-carriers in a multi-carrier system, the method comprising: in the mobile terminal: a transmitter transmitting a probe message to a network device over a first set of sub-carriers during an uplink transmission period of a first period, provided as part of a frame structure, wherein the probe message comprises a predetermined sequence for channel estimation and is used by the network device to perform channel estimation for the first set of sub-carriers; a receiver receiving an allocation message sent from the network device during a downlink transmission period of the first period, the allocation message providing information to the terminal about a second set of sub-carriers allocated to the terminal by the network device which includes sub-carriers selected from among the first set of sub-carriers, and wherein the allocation message is based on the result for channel estimation performed on the probe messages by the network device, and wherein the frame structure comprises the first period during which a terminal transmits a probe message, during an uplink transmission period of the first period and a network device transmits an allocation message, during a downlink transmission period of the first period, and a second period, for transmitting any uplink traffic and downlink traffic between the terminal and the network device over the second set of sub-carriers allocated to the terminal.