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US 2011/0034195 A1Published application
Ranging method and device
AssigneeElectronic and Telecommunications Research Institute
InventorsNamsuk LEE, Sook Jin Lee
Life of this patent
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Abstract
A base station generates a ranging bitmap for indicating whether a ranging code is received through a corresponding ranging channel for each ranging channel, and transmits it to terminals. The terminals check whether the ranging code is successfully transmitted through the ranging bitmap provided by the base station and ranging code identity information included in a ranging response message.
Claims19
A ranging method of a terminal, comprising:
- transmitting a first ranging code through a first ranging channel;
- receiving a ranging bitmap for indicating whether a ranging code is received by a base station through at least one ranging channel including the first ranging channel from the base station;
- checking whether a ranging code is received by the base station through the first ranging channel based on the ranging bitmap;
- and
- retransmitting the first ranging code when no ranging code is received by the base station through the first ranging channel.
2 more elements
A ranging method of a base station, comprising:
- generating a ranging bitmap for indicating whether a ranging code is received for each of at least one ranging channel;
- and
- transmitting the ranging bitmap and a ranging response message for the ranging code that is received through the at least one ranging channel.
A ranging device of a terminal, comprising:
- a ranging code selector for transmitting a first ranging code to a base station through a first ranging channel;
- and
- a ranging response processor for receiving a ranging bitmap for indicating whether a ranging code is received by a base station through at least one ranging channel including a first ranging channel and a ranging response message from the base station, and determining whether to retransmit the first ranging code based on the ranging bitmap and ranging code identity information that is included in the ranging response message.
A ranging device of a base station, comprising:
- a ranging response controller for generating a ranging bitmap for indicating whether a ranging code is received through a ranging channel that corresponds to each of at least one ranging channel, and generating ranging code information that corresponds to the received ranging code;
- a MAP former for forming a MAP including the ranging bitmap;
- a ranging response former for generating a ranging response message based on the ranging code information;
- and
- a transmitter for transmitting the MAP and the ranging response message.
2 more elements
Dependencies are inferred from the claim text.