Random access method for wireless communication systems
First Claim
1. A method for establishing random access communications between a base station and one or more mobile terminals, the method comprising:
- configuring one or more uplink random access opportunities based on time and frequency variables;
broadcasting the uplink random access opportunities;
monitoring the uplink random access opportunities for detecting a random access request; and
providing one or more down link access channels to the mobile terminals making the random access requests, wherein random access requests from multiple mobile terminals occupy different uplink random access opportunities or are modulated by different modulation sequences for reducing collision.
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Accused Products
Abstract
A method is disclosed for establishing wireless random access communications between a base station and multiple mobile terminals. The base station first configures one or more uplink random access opportunities based on predetermined time and frequency variables, and then broadcasts the opportunities. The base station keeps monitoring the uplink random access opportunities so that a random access request made by a mobile terminal using one of the broadcasted opportunities can be detected. Upon receiving the random access request, the base station broadcasts downlink access channels so that a mobile terminal can distinguish which downlink access channel is intended for itself.
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Citations
22 Claims
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1. A method for establishing random access communications between a base station and one or more mobile terminals, the method comprising:
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configuring one or more uplink random access opportunities based on time and frequency variables;
broadcasting the uplink random access opportunities;
monitoring the uplink random access opportunities for detecting a random access request; and
providing one or more down link access channels to the mobile terminals making the random access requests, wherein random access requests from multiple mobile terminals occupy different uplink random access opportunities or are modulated by different modulation sequences for reducing collision. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for establishing random access communications between a base station and one or more mobile terminals, the method comprising:
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configuring one or more uplink random access opportunities based on time and frequency variables;
broadcasting the uplink random access opportunities;
monitoring the uplink random access opportunities chosen by one or more mobile terminals for detecting a random access request therefrom; and
providing one or more down link access channels to the mobile terminals making the random access requests, wherein random access requests from multiple mobile terminals occupy different uplink random access opportunities for reducing collision. - View Dependent Claims (11, 12, 13, 14)
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15. A method for establishing random access communications between a base station and one or more mobile terminals, the method comprising:
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configuring one or more uplink random access opportunities based on time and frequency variables;
broadcasting the uplink random access opportunities;
monitoring the uplink random access opportunities for detecting a random access request; and
providing one or more down link access channels to the mobile terminals making the random access requests, wherein random access requests from multiple mobile terminals share the same random access opportunity but are modulated by different modulation sequences for reducing collision. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification