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US 8,787,957 B2Granted
Methods and procedures for high speed UE access
AssigneeLG Electronics Inc.
InventorsDragan Vujcic, Yeong Hyeon Kwon
Life of this patent
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Abstract
A terminal random access procedure is improved by allowing a mobile terminal to correctly map signature indexes onto cyclic shifted Zadoff-Chu (ZC) sequences when the deployed cells support a high-speed mobility by informing a mobile terminal whether a cell supports high-speed mobility.
Claims8
A method of establishing a communication link between a mobile terminal and a network, the method comprising:
- receiving, by the mobile terminal, a high-speed related parameter from the network, the high-speed related parameter representing either ‘TRUE’ or ‘FALSE’, wherein TRUE corresponds to a restricted set of cyclic shifts and FALSE corresponds to an unrestricted set of cyclic shifts;
- if the high-speed related parameter represents TRUE,
- generating, by the mobile terminal, a first plurality of sequences for random access from Zadoff-Chu (ZC) sequences with zero correlation zones using the restricted set of cyclic shifts;
- and
- transmitting, by the mobile terminal, one of the generated first plurality of sequence to the network for the random access, and
- if the high-speed related parameter represents FALSE,
- generating, by the mobile terminal, a second plurality of sequences for random access from Zadoff-Chu (ZC) sequences with zero correlation zones using the unrestricted set of cyclic shifts;
- and
- transmitting, by the mobile terminal, one of the generated second plurality of sequences to the network for the random access.
6 more elements
A method of establishing a communication link between a mobile terminal and a network, the method comprising:
- transmitting, by the network, a high-speed related parameter to the mobile terminal, the high-speed related parameter representing either ‘TRUE’ or ‘FALSE’, wherein TRUE corresponds to a restricted set of cyclic shifts and FALSE corresponds to an unrestricted set of cyclic shifts;
- and
- if the high-speed related parameter represents TRUE,
- receiving, by the network from the mobile terminal, one of a first plurality of sequences for random access from Zadoff-Chu (ZC) sequences with zero correlation zones that are generated using the restricted set of cyclic shifts, and
- if the high-speed related parameter represents FALSE,
- receiving, by the network from the mobile terminal, one of a second plurality of sequences for random access from Zadoff-Chu (ZC) sequences with zero correlation zones that are generated using the unrestricted set of cyclic shifts.
3 more elements
A mobile terminal for establishing a communication link with a network, the mobile terminal comprising:
- a transmitting/receiving unit configured to transmit and receive messages between the mobile terminal and the network;
- a display unit configured to display user interface information;
- an input unit configured to receive inputs from a user;
- and
- a processing unit configured to:
- receive a high-speed related parameter from the network, the high-speed related parameter representing either ‘TRUE’ or ‘FALSE’, wherein TRUE corresponds to a restricted set of cyclic shifts and FALSE corresponds to an unrestricted set of cyclic shifts;
- if the high-speed related parameter represents TRUE,
- generate a first plurality of sequences for random access from Zadoff-Chu (ZC) sequences with zero correlation zones using the restricted set of cyclic shifts;
- and
- transmit one of the generated first plurality of sequences to the network for the random access, and
- if the high-speed related parameter represents FALSE,
- generate a second plurality of sequences for random access from Zadoff-Chu (ZC) sequences with zero correlation zones using the unrestricted set of cyclic shifts;
- and
- transmit one of the generated second plurality of sequences to the network for the random access.
11 more elements
A network for establishing a communication link with a mobile terminal, the network comprising:
- a transmitter configured to transmit messages to the mobile terminal;
- a receiver configured to receive messages from the mobile terminal;
- and
- a controller configured to:
- transmit, to the mobile terminal, a high-speed related parameter representing either ‘TRUE’ or ‘FALSE’, wherein TRUE corresponds to a restricted set of cyclic shifts and FALSE corresponds to an unrestricted set of cyclic shifts;
- and
- if the high-speed related parameter represents TRUE,
- receive, from the mobile terminal, one of a first plurality of sequences for random access from Zadoff-Chu (ZC) sequences with zero correlation zones that are generated using the restricted set of cyclic shifts, and
- if the high-speed related parameter represents FALSE,
- receive, from the mobile terminal, one of a second plurality of sequences for random access from Zadoff-Chu (ZC) sequences with zero correlation zones that are generated using the unrestricted set of cyclic shifts.
7 more elements
Dependencies are inferred from the claim text.