Random access in dynamic and shared spectrums
First Claim
1. A method for configuring a random access channel (RACH) procedure used by a wireless transmit/receive unit (WTRU) in a communication system, the method comprising:
- determining whether a secondary user is present in an operating channel; and
performing a RACH procedure based on the determination, wherein based on a determination that the secondary user is absent in the operating channel of the communication system, a first RACH procedure is performed, and based on a determination that the secondary user is present in the operating channel of the communication system, a second RACH procedure different from the first RACH procedure is performed.
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Accused Products
Abstract
Systems and methods for using a communication system in a spectrum are provided. For example, a random access or RACH procedure may be performed where the random access or RACH procedure may be configured to reduce secondary interference and/or to be used in a pixel-based environment. The random access or RACH procedure may include selecting a RACH preamble; sending a RACH preamble and/or format information; determining a transmission power of the RACH preamble and/or the format information; determining a random access radio network temporary identifier (RA-RNTI) and preamble ID associated with the RACH preamble; and/or selecting a physical RACH (PRACH).
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Citations
32 Claims
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1. A method for configuring a random access channel (RACH) procedure used by a wireless transmit/receive unit (WTRU) in a communication system, the method comprising:
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determining whether a secondary user is present in an operating channel; and performing a RACH procedure based on the determination, wherein based on a determination that the secondary user is absent in the operating channel of the communication system, a first RACH procedure is performed, and based on a determination that the secondary user is present in the operating channel of the communication system, a second RACH procedure different from the first RACH procedure is performed. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for using a communication system comprising a wireless transmit/receive unit (WTRU) in a spectrum, the method comprising:
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selecting a random access channel (RACH) procedure as a function of a presence or an absence of a secondary user in an operating channel of the communication system; and performing the selected random access channel (RACH) procedure. - View Dependent Claims (9, 10, 11)
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12. A method for configuring a random access channel (RACH) procedure used by a wireless transmit/receive unit (WTRU) in a communication system, the method comprising:
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determining, at an eNB, whether a secondary user is present in an operating channel of the communication system; and configuring the RACH procedure at the WTRU based on whether the secondary user is present in the operating channel of the communication system. - View Dependent Claims (13, 14, 15, 16)
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17. A wireless transmit/receive unit (WTRU) comprising:
a processor configured to; determine whether a secondary user is present in an operating channel of a communication system; and perform a random access channel (RACH) procedure based on the determination, wherein based on a determination that the secondary user is absent in the operating channel, a first RACH procedure is performed, and based on a determination that the secondary user is present in the operating channel, a second RACH procedure different from the first RACH procedure is performed. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A wireless transmit/receive unit (WTRU) comprising:
a processor configured to; select a random access channel (RACH) procedure as a function of a presence or an absence of a secondary user in an operating channel of a communication system; and perform the selected random access channel (RACH) procedure. - View Dependent Claims (25, 26, 27)
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28. A wireless transmit/receive unit (WTRU) comprising:
a processor configured to; receive information indicating whether a secondary user is present in an operating channel of the communication system; and configure the RACH procedure when the secondary user is present in the operating channel of the communication system. - View Dependent Claims (29, 30, 31, 32)
Specification