Method of allocating resource and method of forming ranging channel
AssigneeElectronics and Telecommunications Research Institute
InventorsChoong Il Yeh, Byung-Jae Kwak, Dong Seung Kwon, Jee Hwan Ahn
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Abstract
An access point allocates a resource for ranging to an access terminal included therein, and receives a ranging channel that includes an identifier of the access terminal and a plurality of pilots. The AP checks the access terminal by using the received identifier, and measures a round trip delay of the access terminal based on the received pilots.
Claims10
A method for allocating a resource for a ranging channel from an access point to an access terminal, comprising:
- allocating a resource for ranging to the access terminal;
- receiving the ranging channel from an access terminal included in the access point, the ranging channel including an identifier of the access terminal and a plurality of pilots;
- checking the access terminal based on the identifier of the access terminal;
- and
- measuring a round trip delay of the access terminal based on the pilots,
- wherein the measuring of the round trip delay of the access terminal is performed based on at least one pair of pilots among the plurality of pilots, and
- wherein the round trip delay is determined by a phase difference of subcarriers to which at least one pair of pilots is mapped and an FFT window size.
A method for allocating a resource for a ranging channel from an access point to an access terminal, comprising:
- allocating a resource for ranging to the access terminal;
- receiving the ranging channel from an access terminal included in the access point, the ranging channel including an identifier of the access terminal and a plurality of pilots,
- checking the access terminal based on the identifier of the access terminal;
- and
- measuring a round trip delay of the access terminal based on the pilots,
- wherein the measuring of the round trip delay of the access terminal is performed based on at least one pair of pilots among the plurality of pilots, and
- wherein the round trip delay corresponds to a value obtained by dividing a phase of the product of the pair of pilots by the product of a subcarrier difference between the pair of pilots and 2π.
A method for an access terminal to form a ranging channel, comprising:
- performing channel coding for ranging channel information;
- mapping channel-coded ranging channel information and a pilot to a subcarrier and modulating the mapped subcarrier;
- and
- generating a ranging channel by performing inverse fast Fourier transform (IFFT) on the modulated signal,
- wherein the ranging channel information includes an identifier of the access terminal, and
- wherein a round trip delay corresponds to a value obtained by dividing a phase of the product of one pair of pilots by the product of a subcarrier difference between the pair of pilots and 2π.
Dependencies are inferred from the claim text.