UPLINK SYNCHRONIZATION WITH MULTIPLE TIMING ADVANCES IN A WIRELESS COMMUNICATION ENVIRONMENT
First Claim
1. A method for detecting uplink control information on a component carrier configured as a serving cell, comprising:
- receiving, at an evolved Node B (eNodeB), a message 1 pertaining to a Random Access CHannel (RACH) communication from a User Equipment (UE);
identifying a Cell-Radio Network Temporary Identifier (C-RNTI) pertaining to the UE to receive a Downlink Control Information (DCI) message including resource allocation information for a message 2 associated with the RACH communication; and
sending the DCI message in at least one channel control element in a UE Specific Search Space (USS) within a Physical Downlink Control CHannel (PDCCH) search space of at least one sub-frame transmitted by the eNodeB, wherein the DCI message is configured with a Cyclic Redundancy Check (CRC), wherein the CRC is configured not to produce a CRC error during blind decoding performed by applying the C-RNTI to the DCI message.
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Accused Products
Abstract
Technology for synchronization of uplink transmission with multiple timing advances in a wireless communication environment is disclosed. Additional resource allocation messages for additional timing advances are addressed to a user equipment specific search space. A number of band decodes needed to find a resource allocation message used to access an additional timing advance can be reduced by padding the resource allocation message. A number of blind decodes used to find the resource allocation message can also be reduced by restricting the control channel candidates in which the resource avocation can be embedded in terms of the control channel element aggregation level, or levels, associated with acceptable control channel candidates.
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Citations
30 Claims
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1. A method for detecting uplink control information on a component carrier configured as a serving cell, comprising:
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receiving, at an evolved Node B (eNodeB), a message 1 pertaining to a Random Access CHannel (RACH) communication from a User Equipment (UE); identifying a Cell-Radio Network Temporary Identifier (C-RNTI) pertaining to the UE to receive a Downlink Control Information (DCI) message including resource allocation information for a message 2 associated with the RACH communication; and sending the DCI message in at least one channel control element in a UE Specific Search Space (USS) within a Physical Downlink Control CHannel (PDCCH) search space of at least one sub-frame transmitted by the eNodeB, wherein the DCI message is configured with a Cyclic Redundancy Check (CRC), wherein the CRC is configured not to produce a CRC error during blind decoding performed by applying the C-RNTI to the DCI message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A device for detecting uplink control information on a component carrier configured as a serving cell, comprising:
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a detection module operating at an evolved Node B (eNodeB), the detection module configured to detect a message 1 from a Random Access CHannel (RACH) communication from a User Equipment (UE); an identification module operating at the eNodeB, the identification module configured to identify a Cell-Radio Network Temporary Identifier (C-RNTI), upon detection of the message 1 by the detection module, the C-RNTI corresponding to a UE Specific Search Space (USS) of a serving cell of the UE with a Physical Downlink Control CHannel (PDCCH); a message generation module operating at the eNodeB, the message generation module configured to embed the C-RNTI in a Cyclic Redundancy Check (CRC) of a Downlink Control Information (DCI) message together with resource allocation information for a message 2 associated with the RACH communication; and a transmission module operating at the eNodeB, the transmission module configured to send the DCI message generated by the message generation module to the UE over the serving cell of the UE configured to carry the PDCCH. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A computer program product for detecting uplink control information on a component carrier configured as a serving cell, comprising a non-transitory computer usable medium having a computer readable program code embodied therein, the computer readable program code adapted to be executed at an evolved Node B (eNodeB) to implement a method for reducing blind decodes, comprising:
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detecting a Random Access CHannel (RACH) communication from a User Equipment (UE); determining a serving cell of the UE with a Physical Downlink Control CHannel (PDCCH) on which to respond to the RACH communication; identifying a Cell-Radio Network Temporary Identifier (C-RNTI) corresponding to a UE Specific Search Space (USS) of the serving cell with the Physical Downlink Control CHannel (PDCCH); including the C-RNTI in a Cyclic Redundancy Check (CRC) of a Downlink Control Information (DCI) message including resource allocation information for a message 2 associated with the RACH communication; and sending the DCI message to the UE over the serving cell. - View Dependent Claims (19, 20, 21, 22, 23)
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24. A method for detecting uplink control information, comprising:
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initiating, by a User Equipment (UE), a Random Access CHannel (RACH) communication with an evolved Node B (eNodeB) by sending a RACH message 1 to the eNodeB; receiving, at the UE, at least one sub-frame transmitted from the eNodeB with, among multiple control channel candidates, a target control channel candidate carrying a Downlink Control Information (DCI) message including resource allocation information for a message 2 associated with the RACH communication, the multiple channel control candidates residing within a UE Specific Search Space (USS) within a Physical Downlink Control CHannel (PDCCH) search space in the at least one sub-frame, the multiple channel control candidates configured with a Cyclic Redundancy Check (CRC); restricting a series of blind decodes to be performed by the UE to find the DCI message both to the USS and to control channel candidates within the multiple channel control candidates that satisfy at least one predefined format requirement; performing the series of blind decodes on a reduced set of control channel candidates within the USS that satisfy the at least one predefined format requirement by applying a Cell-Radio Network Temporary Identifier (C-RNTI) to the reduced set of control channel candidates; and identifying the target control channel candidate within the USS upon an absence of a CRC error code after a blind decode in the series of blind decodes that are performed on the target control channel candidate. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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Specification