Hierarchical random acces method for wireless communication system having significantly large cell
AssigneeElectronics and Telecommunications Research Institute
InventorsTae Chul HONG, Hee Wook KIM, Kunseok KANG, Do-Seob AHN, Ho Jin LEE
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Abstract
Disclosed is a hierarchical random access method for a wireless communication system having a significantly large cell. According to the present invention, a length of a preamble sequence and a length of a reference slot may be designed based on a terminal having greatest capacity of adjusting a timing error arrived at a base station, and a slot length may be designed to be an integer multiple of the length of the reference slot depending on a timing error correction capacity, thereby enabling terminals to use various slot lengths.
Claims15
A hierarchical random access method for a wireless communication system having a significantly large cell, the method comprising:
- setting, based on a reference terminal selected according to a performance of correcting a timing error with a base station, a length of a preamble sequence for random access of a random access terminal and a length of a reference slot being a basis for division of a slot for the random access;
- and
- configuring a length of the slot for the random access based on the length of the reference slot.
A hierarchical random access method for a wireless communication system having a significantly large cell, the method comprising:
- setting, into a receiving period of a preamble sequence for a random access, a slot length of a random access terminal free from a timing error correction capability;
- and
- receiving the preamble sequence for the random access based on the receiving period of the preamble sequence for the random access.
A hierarchical random access method for a wireless communication system having a significantly large cell, the method comprising:
- receiving, from a base station through a broadcasting channel (BCH), system information including information for random access of a terminal;
- setting parameters associated with the random access;
- and
- selecting, based on the parameters, a preamble sequence of a plurality of preamble sequence groups to transmit data.
A hierarchical random access method for a wireless communication system having a significantly large cell, the method comprising:
- determining whether a number of terminals using a length of a presently used slot exceeds a predetermined number when re-transmitting a preamble for random access;
- and
- changing the length of the presently used slot to re-transmit the preamble for random access using the presently used slot having a changed length when the number of terminals exceeds the predetermined number.
A hierarchical random access method for a wireless communication system having a significantly large cell, the method comprising:
- transmitting a preamble for random access by a terminal performing random access;
- maintaining a power-saving mode until an operation time of a receiving window in accordance with the transmission of the preamble after transmitting the preamble for random access;
- and
- receiving a random access result through the receiving window.
Dependencies are inferred from the claim text.