US 8,619,695 B2 · Ranging of terminal in legacy support mode

Abstract

The present invention relates to a broadband wireless access system, and more particularly, a ranging technique of a terminal using a legacy support frame in a mobile communication system including a legacy system and an advanced system. According to one form of an embodiment of the present invention, the ranging method of the terminal for a base station in the mobile communication system having the legacy system and the advanced system comprises the steps of: receiving secondary super frame header (S-SFH) information from the base station; determining whether a frame composition used in the mobile communication system supports the legacy system; acquiring ranging channel information for initial ranging, handover ranging, and periodical ranging from the S-SFH; and performing one or more ranging processes of the initial ranging, the handover ranging, and the periodical ranging in the base station by using the ranging channel information.

Claims12

Dependent claims

A method of, at a terminal, performing a ranging procedure with respect to a base station in a mobile communication system in which a legacy system and an advanced system coexist, the method comprising:

receiving a secondary super frame header (S-SFH) from the base station;
determining whether the mobile communication system supports the legacy system;
acquiring ranging channel information for performing initial ranging, handover ranging and periodic ranging from the S-SFH if the mobile communication system supports the legacy system;
and
performing at least one of the initial ranging, the handover ranging and the periodic ranging with respect to the base station using the ranging channel information,
wherein the terminal receives the S-SFH via a first zone supporting the advanced system in a frame, and the ranging channel is allocated to a second zone supporting the legacy system in the frame, and
wherein the terminal transmits ranging codes allocated to the terminal to the base station via the ranging channel of the second zone and, if the terminal does not receive a ranging ACK message from the base station via the first zone, the terminal retransmits the ranging codes to the base station via the ranging channel of the second zone.

4 more elements

A terminal which performs a ranging procedure with respect to a base station in a mobile communication system in which a legacy system and an advanced system coexist, the terminal comprising:

a processor;
and
a radio frequency (RF) communication module configured to transmit or receive an RF signal to or from the base station under the control of the processor,
wherein the processor determines whether the mobile communication system supports the legacy system if a secondary super frame header (S-SFH) is received from the base station via the RF module, acquires ranging channel information for performing initial ranging, handover ranging and periodic ranging from the S-SFH if the mobile communication system supports the legacy system, and performs at least one of the initial ranging, the handover ranging and the periodic ranging with respect to the base station using the ranging channel information,
wherein the S-SFH is transmitted to the RF communication module via a first zone supporting the advanced system in a frame, and the ranging channel is allocated to a second zone supporting the legacy system in the frame, and
wherein the terminal transmits ranging codes allocated to the terminal to the base station via the ranging channel of the second zone and, if the terminal does not receive a ranging ACK message from the base station via the first zone, the terminal retransmits the ranging codes to the base station via the ranging channel of the second zone.

3 more elements

Dependencies are inferred from the claim text.

Ranging of terminal in legacy support mode

Life of this patent

Ranging of terminal in legacy support mode

Life of this patent

Abstract

Claims12