Method for performing random access procedures and terminal thereof
First Claim
1. A method of performing a random access procedure between a mobile terminal and a network, the method performed by the mobile terminal and comprising:
- transmitting, a first type of Random Access Preamble or a second type of Random Access Preamble, to the network;
receiving a Random Access Response sent from the network in response to the first type of Random Access Preamble or the second type of Random Access Preamble;
wherein the first type of Random Access Preamble is selectable by the mobile terminal, and the second type of Random Access Preamble is explicitly signaled; and
performing a discontinuous reception (DRX) operation that allows the mobile terminal to monitor a Physical Downlink Control Channel (PDCCH) discontinuously, if the DRX operation is configured,wherein the discontinuous reception (DRX) operation employs an active time that denotes a time duration in which the mobile terminal is configured to monitor the PDCCH, and the active time includes a time duration while;
an On-Duration timer or a DRX Inactivity timer or a DRX Retransmissiontimer or a Contention Resolution timer is running,a Scheduling Request procedure is pending,an uplink grant for a retransmission can occur, ora PDCCH indicating a new transmission addressed to a Cell-Radio Network Temporary Identifier (C-RNTI) of the mobile terminal has not yet been received after successful reception of the Random Access Response for the second type of Random Access Preamble,wherein transmitting the first type of Random Access Preamble comprises;
selecting a random access preamble among a set of random access preambles indicated via system information or a handover command;
selecting resources to be used in transmitting said selected random access preamble; and
transmitting said selected random access preamble using the selected resources.
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Accused Products
Abstract
A random access procedure between a mobile terminal and a network is performed based upon the characteristics of a RACH preamble. If the RACH preamble was explicitly signaled by the network, a downlink channel is monitored until a new transmission is indicated according to radio resource allocation information received from the network. If the RACH preamble was not explicitly signaled by the network, a contention resolution timer is started and the downlink channel is monitored until the contention resolution timer expires. Such monitoring of downlink channels in a more efficient manner, results in effective reduction in power consumption.
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Citations
18 Claims
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1. A method of performing a random access procedure between a mobile terminal and a network, the method performed by the mobile terminal and comprising:
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transmitting, a first type of Random Access Preamble or a second type of Random Access Preamble, to the network; receiving a Random Access Response sent from the network in response to the first type of Random Access Preamble or the second type of Random Access Preamble; wherein the first type of Random Access Preamble is selectable by the mobile terminal, and the second type of Random Access Preamble is explicitly signaled; and performing a discontinuous reception (DRX) operation that allows the mobile terminal to monitor a Physical Downlink Control Channel (PDCCH) discontinuously, if the DRX operation is configured, wherein the discontinuous reception (DRX) operation employs an active time that denotes a time duration in which the mobile terminal is configured to monitor the PDCCH, and the active time includes a time duration while; an On-Duration timer or a DRX Inactivity timer or a DRX Retransmission timer or a Contention Resolution timer is running, a Scheduling Request procedure is pending, an uplink grant for a retransmission can occur, or a PDCCH indicating a new transmission addressed to a Cell-Radio Network Temporary Identifier (C-RNTI) of the mobile terminal has not yet been received after successful reception of the Random Access Response for the second type of Random Access Preamble, wherein transmitting the first type of Random Access Preamble comprises; selecting a random access preamble among a set of random access preambles indicated via system information or a handover command; selecting resources to be used in transmitting said selected random access preamble; and transmitting said selected random access preamble using the selected resources. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A mobile terminal comprising:
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an input/output interface configured to provide inputs and outputs; a microprocessor; and a communication module, cooperating with the input/output interface the microprocessor is configured to cause the communication module to; transmit a first type of Random Access Preamble or a second type of Random Access Preamble, to the network; receive a Random Access Response sent from the network in response to the first type of Random Access Preamble or the second type of Random Access Preamble; wherein the first type of Random Access Preamble is selectable by the mobile terminal, and the second type of Random Access Preamble is explicitly signaled; and perform a discontinuous reception (DRX) operation that allows the mobile terminal to monitor a Physical Downlink Control Channel (PDCCH) discontinuously, if the DRX operation is configured, wherein the discontinuous reception (DRX) operation employs an active time that denotes a time duration in which the mobile terminal is configured to monitor the PDCCH, and the active time includes a time duration while; an OnDuration timer or a DRX Inactivity timer or a DRX Retransmission timer or a Contention Resolution timer is running, a Scheduling Request procedure is pending, an uplink grant for a retransmission can occur, or a PDCCH indicating a new transmission addressed to a Cell-Radio Network Temporary Identifier (C-RNTI) of the mobile terminal has not yet been received after successful reception of the Random Access Response for the second type of Random Access Preamble, wherein for transmission of the first type of Random Access Preamble, the microprocessor is configured to; select a random access preamble among a set of random access preambles indicated via system information or a handover command; select resources to be used in transmitting said selected random access preamble; and cause the communication module to transmit said selected random access preamble using the selected resources. - View Dependent Claims (15, 16, 17, 18)
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Specification