UPLINK SCRAMBLING DURING RANDOM ACCESS
First Claim
1. A method implemented in a user terminal for accessing a radio channel, comprising:
- detecting a first set of uplink scrambling sequences specifically associated with a radio base station'"'"'s cell area or random access channel but which are not specifically assigned to any user terminal;
determining a selected one of the first set of uplink scrambling sequences;
generating a random access message using the selected one of the first set of uplink scrambling sequences; and
transmitting the random access message to the radio base station.
1 Assignment
0 Petitions
Accused Products
Abstract
The technology described in this case facilitates random access by a user terminal with a radio base station. A user terminal determines one of a first type of uplink scrambling sequences and generates a random access message using the determined one of the first type of uplink scrambling sequences. The random access message is transmitted to the base station. The user terminal receives from the base station a second, different type of uplink scrambling sequence and uses it for subsequent communication with the radio base station. For example, the first uplink scrambling sequences may be specifically associated with the radio base station'"'"'s cell area or a random access radio channel associated with the radio base station, but they are not specifically assigned to any user terminal, and the second uplink scrambling sequence may be selected from a second set of uplink scrambling sequences specifically assignable to individual user terminals.
212 Citations
27 Claims
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1. A method implemented in a user terminal for accessing a radio channel, comprising:
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detecting a first set of uplink scrambling sequences specifically associated with a radio base station'"'"'s cell area or random access channel but which are not specifically assigned to any user terminal; determining a selected one of the first set of uplink scrambling sequences; generating a random access message using the selected one of the first set of uplink scrambling sequences; and transmitting the random access message to the radio base station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method implemented in a base station for responding to user terminals requesting service from the base station over a radio channel, comprising:
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broadcasting a first set of uplink scrambling sequences specifically associated with a radio base station'"'"'s cell area or random access channel but which are not specifically assigned to any user terminal; receiving from one of the user terminals a random access message using the one of the first set of uplink scrambling sequences; transmitting to the one user terminal a user terminal-specific uplink scrambling sequence selected from a second set of uplink scrambling sequences specifically assignable to user terminals; and receiving a subsequent communication from the one user terminal scrambled with the selected user terminal-specific uplink scrambling sequence for subsequent communication with the radio base station. - View Dependent Claims (12)
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13. A user terminal for requesting service from a base station having a cell area where the base station offers radio communications service, comprising
electronic processing circuitry configured to: -
determine one of a first type of uplink scrambling sequences, and generate a random access message using the determined one of the first type of uplink scrambling sequences, and radio transmission circuitry for transmitting the random access message to the radio base station, and radio receiving circuitry for receiving from the radio base station a second different type of uplink scrambling sequence, wherein the electronic processing circuitry is configured to use the second different type of uplink scrambling sequence for subsequent communication with the radio base station. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A radio base station for responding to user terminals requesting service from the base station over a radio channel, comprising circuitry configured to:
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broadcast a first set of uplink scrambling sequences specifically associated with a radio base station'"'"'s cell area or random access channel but which are not specifically assigned to any user terminal; receive from one of the user terminals a random access message using the one of the first set of uplink scrambling sequences; transmit to the one user terminal a user terminal-specific uplink scrambling sequence selected from a second set of uplink scrambling sequences specifically assignable to user terminals; and receive a subsequent communication from the one user terminal scrambled with the selected user terminal-specific uplink scrambling sequence for subsequent communication with the radio base station. - View Dependent Claims (25, 26, 27)
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Specification