PTO/SB/14 (07-07)
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`Approved for use through 06/30/2010. 0MB 0651-0032
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`U.S. Patent and Trademark Office; U.S. DEPARTMENT OF COMMERCE
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`/ P30138-US2 Attorney Docket Number 4015-6942
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`Data Sheet 37 CFR 1. 76 Application Number
`Application
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`in L TE-Advanced Title of Invention PUCCH Resource Allocation for Carrier Aggregation
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`The application data sheet is part of the provisional or nonprovisional application for which it is being submitted. The following form contains the
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`bibliographic data arranged in a format specified by the United States Patent and Trademark Office as outlined in 37 CFR 1.76.
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`This document may be completed electronically and submitted to the Office in electronic format using the Electronic Filing System (EFS) or the
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`Secrecy Order 37 CFR 5.2
`to Data Sheet may fall under a Secrecy Order pursuant associated with this Application D Portions or all of the application
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`PTO/SB/14 {07-07)
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`Approved for use through 06/30/2010. 0MB 0651-0032
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`U.S. Patent and Trademark Office; U.S. DEPARTMENT OF COMMERCE
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`Data Sheet 37 CFR 1.76 Application Application Number
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`in L TE-Advanced Aggregation Title of Invention PUCCH Resource Allocation for Carrier
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`/ P30138-US2 Attorney Docket Number 4015-6942
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`hip under 37 CFR 1.41 (b} DE
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`under 35 U.S.C. 117 IOParty of Interest under 35 U.S.C. 118
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`Mirl,-11.a """'"'"
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`PTO/SB/14 (07-07)
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`Approved for use through 06/30/2010. 0MB 0651-0032
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`Data Sheet 37 CFR 1.76 Application Application Number
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`PUCCH Resource Allocation for Carrier Aggregation in L TE-Advanced
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`/ P30138-US2 Attorney Docket Number 4015-6942
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`in L TE-Advanced Aggregation Title of the Invention PUCCH Resource Allocation for Carrier
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`(07-07)
`PTOISBl14
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`for use through 0613012010. 0MB 0651-0032
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`Data Sheet 37 CFR 1.76 Application Application Number
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`PUCCH Resource Allocation for Carrier Aggregation in L TE-Advanced
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`PTO/SB/14 (07-07}
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`Approved for use through 06/30/2010. 0MB 0651-0032
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`U.S. Patent and Trademark Office; U.S. DEPARTMENT OF COMMERCE
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`4015-6942 / P30138-US2
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`Application Number
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`in L TE-Advanced Aggregation Title of Invention PUCCH Resource Allocation for Carrier
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`First Name David
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`Last Name Bennett
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`4015-6942
`P30138-US2
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`PUCCH RESOURCE ALLOCATION FOR CARRIER AGGREGATION
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`IN L TE-ADVANCED
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`RELATED APPLICATION
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`[001]This application claims the benefit of U.S. Provisional Patent Application
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`61/248,661 filed October 5, 2009, which is incorporated herein by reference.
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`TECHNICAL FIELD
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`[002]The present invention relates generally to carrier aggregation in a mobile
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`communication system and, more particularly, to an efficient resource allocation for the
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`physical uplink control channel for carrier aggregation.
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`[003]Carrier aggregation is one of the new features being discussed for the next
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`BACKGROUND
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`generation of Long Term Evolution (LTE) systems, which is being standardized as part
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`of L TE Release 10 (known as L TE-Advanced). L TE Rel 8 currently supports bandwidths
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`up to 20 MHz. In LTE-Advanced, bandwidths up to 100 MHz will be supported. The
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`of the will require an expansion very high data rates contemplated for L TE-Advanced
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`transmission bandwidth.
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`In order to maintain backward compatibility with LTE Rel-8
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`user terminals, the available spectrum is divided into Rel-8 compatible chunks called
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`component carriers. Carrier aggregation enables the needed bandwidth expansion by
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`allowing
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`user terminals to transmit data over multiple component carriers comprising up
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`use of a wide carrier also ensures efficient to 100 MHz of spectrum. Carrier aggregation
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`for legacy terminals by making it possible for legacy terminals to be scheduled in all
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`[004]The number of aggregated component carriers, as well as the bandwidth of the
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`individual component carrier, may be different for Uplink (UL) and Downlink (DL). A
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`IPR2022-00648
`Apple EX1005 Page 6
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`symmetric configuration refers to the case where the number of component carriers in
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`4015-6942
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`downlink and uplink is the same. An asymmetric configuration refers to the case where
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`the number of component carriers is different. The number of component carriers
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`configured for a geographic cell area may be different from the number of component
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`carriers seen by a terminal. A user terminal, for example, may support more downlink
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`component carriers than uplink component carriers, even though in the geographic cell
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`area the same number of uplink and downlink component carriers is offered by the
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`network.
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`control signalingis how to transmit [005]One consideration for carrier aggregation
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`from the user terminal on the uplink from the user terminal. Uplink control signaling may
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`include acknowledgement (ACK) signaling for hybrid automatic repeat request (HARO)
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`protocols, channel state and quality information (CSI, CQI) reporting for downlink
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`scheduling, and scheduling requests (SRs) indicating that the user terminal needs uplink
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`resources for uplink data transmissions. One solution is to transmit the uplink control
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`information on multiple uplink component carriers associated with different downlink
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`component carriers. However, this option is likely to result in higher user terminal power
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`consurnpiiori and a dependency on specific user terminal capabilities. It may also create
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`implementation issues due to inter-modulation products, and may lead to generally
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`higher complexity for implementation and testing.
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`SUMMARY
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`[006]The invention
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`provides a signaling mechanism for efficient transmission of control
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`information in a communication system using carrier aggregation. The signaling
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`mechanism allows the transmission, on a single uplink component carrier, of control
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`information associated with downlink transmissions on multiple aggregated downlink
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`component carriers. Semi-statically reserved resources for the transmission of control
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`2
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`IPR2022-00648
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`information on the uplink component carrier may be dynamically shared by user
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`4015-6942
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`terminals that are assigned multiple downlink component carriers for downlink
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`transmissions. Implicit or explicit resource indication can be used in combination with
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`dynamic resource indication.
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`comprises a method implementedof the invention [007]One exemplary embodiment
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`by a base station of receiving control information from user terminals. The method
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`comprises scheduling downlink transmissions to said user terminal on one or more
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`downlink component carriers; if the user terminal is scheduled to receive downlink
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`transmissions on a first single downlink component carrier, receiving control information
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`resources on a uplink primary component carrier associated with said first downlink
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`transmissions on a second single downlink component carrier or multiple downlink
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`transmissions to the user terminal on a second set of radio resources on the uplink
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`[uuoj Another exempiary embodiment of the invention comprises a base station for
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`transmitting data to one or more user terminals. The base station comprises a
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`transmitter to transmit user data on one or more downlink component carriers to a user
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`terminal; and a controller to schedule downlink transmissions to the user terminal. The
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`controller is configured to schedule downlink transmissions to the user terminal on one
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`or more downlink component carriers; if the user terminal is scheduled to receive
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`downlink transmissions on a first single downlink component carrier, receive control
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`information associated with the downlink transmissions to the user terminal on a first set
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`of radio resources on a uplink primary component carrier associated with said first
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`downlink component carrier; and, if the user terminal is scheduled to receive downlink
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`Apple EX1005 Page 8
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`transmissions on a second single downlink component carrier or multiple downlink
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`component carriers, receive control information associated with the downlink
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`transmissions to the user terminal on a second set of radio resources on the uplink
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`primary component carrier ..
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`comprises a method ofof the invention embodiment [009]Another exemplary
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`transmitting control information implemented by a user terminal in a mobile
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`communication network. The method comprises receiving an assignment of radio
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`resources for downlink transmissions from a base station; transmitting control
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`information associated with the downlink transmissions on a first set of radio resources
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`on an uplink component carrier if an assignment of single downlink component carrier for
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`the downlink transmission is received; and transmitting control information associated
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`with the downlink transmissions on a second set of radio resources on the uplink
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`component
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`downlink transmission is received.
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`comprises a user terminal of the invention embodiment [01 OJ Another exemplary
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`configured to send control information associated with downlink transmissions on one or
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`rnore downiirik cornponeni carriers. The userterminai comprises a receiver to receive
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`downlink
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`transmissions from a base station; a transmitter to transmit control information
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`associated with the downlink transmission to a base station; and a controller to select
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`radio resources for transmission of control information associated with the downlink
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`transmissions. The controller is configured to select a. first set of radio resources on an
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`uplink
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`component carrier if an assignment of a single downlink component carrier for the
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`downlink transmission is received; and select a second set of radio resources on the
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`uplink component carrier if an assignment of multiple downlink component carriers lor
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`the downlink transmission is received.
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`IPR2022-00648
`Apple EX1005 Page 9
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`[011]Another exemplary embodiment of the invention comprises an alternate method
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`4015-6942
`P30138-US2
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`of transmitting control information implemented by a user terminal in a mobile
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`communication network. The method comprises receiving an assignment of radio
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`resources for a downlink transmissions from a base station; transmitting control
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`information associated with the downlink transmission on a first set of radio resources on
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`an uplink component carrier if an assignment of a first downlink component carrier for
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`the downlink transmission is received; and transmitting control information associated
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`with the downlink transmission on a second set of radio resources on the uplink
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`downlink transmission is received.
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`[012]Another exemplary embodiment of the invention comprises a user terminal
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`configured to send control information associated with downlink transmissions on one or
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`more downlink component carriers. The user terminal comprises a receiver to receive
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`downlink transmissions from a base station; a transmitter to transmit control information
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`associated with the downlink transmission to a base station; and a controller to select
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`radio resources for transmission of control information associated with the downlink
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`iransrnission. The coniroiier is configured to seiect a first set of radio resources on an
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`uplink component carrier if an assignment of a first downlink component carrier for the
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`downlink transmission is received; and select a second set of radio resources on the
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`uplink component carrier if an assignment of a second downlink component carrier for
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`the downlink transmission is received.
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`BRIEF DESCRIPTION OF THE DRAWINGS
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`[013] Fig. 1 illustrates
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`an·exemplary OFDM communication system.
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`[014]Fig. 2 illustrates an exemplary time-frequency grid for an OFDM system.
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`[015]Fig. 3 illustrates
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`an exemplary time-domain structure for an OFDM system.
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`IPR2022-00648
`Apple EX1005 Page 10
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`4015-6942
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`[016]Fig. 4 illustrates uplink L 1/L2 control signaling transmission on PUCCH.
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`[017] Fig. 5 illustrates
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`the PUCCH format 1 using a normal _cyclic prefix.
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`[018]Fig. 6 illustrates the PUCCH format 2 using a normal cyclic prefix.
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`[019] Fig. 7 illustrates
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`an exemplary allocation of resource blocks for PUCCH.
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`[020]Fig. 8 illustrates
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`the concept of carrier aggregation.
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`[021]Fig. 9 illustrates an exemplary method implemented by a base station of
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`receiving control information from user terminals scheduled on a single carrier and
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`multiple carriers.
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`[022]Fig. 10 illustrates an exemplary method implemented by a user terminal of
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`Signaling control information to a base station.
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`[023]Fig. 11 illustrates another exemplary method implemented by a user terminal of
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`signaling control information to a base station.
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`[024] Fig. 12 illustrates
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`an exemplary base station with a controller for controlling
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`downlink transmissions by the base station to one or more user terminals and
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`associated transmissions of uplink control information by the user terminals
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`[025] Fig. 13 illustrates
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`an exemplary user terminal with a controller for controlling
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`transmission of upiink controi information to a base station.
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`[026]Referring now to the drawings, Fig. 1 illustrates an exemplary mobile
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`DETAILED DESCRIPTION
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`communication network 10 for providing wireless communication services to user
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`terminals 100. Three user terminals 100 are shown in Fig. 1. The user terminals 100
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`may comprise, for example, cellular telephones, personal digital assistants, smart
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`phones, laptop computers, handheld computers, or other devices with wireless
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`communication capabilities. The mobile communication network 10 comprises a
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`plurality of geographic cell areas or sectors 12. Each geographic cell area or sector 12
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`Apple EX1005 Page 11
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`is served by a base station 20, which is referred to in L TE as a NodeB or Enhanced
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`Nod�B (eNodeB). A single base station 20 may provide service in multiple geographic
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`cell areas or sectors 12. The user terminals 100 receive signals from a serving base
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`station 20 on one or more downlink (DL) channels, and transmit signals to the base
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`station 20 on one or more uplink (UL) channels.
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`invention willof the present embodiment [027]For illustrative purposes, an exemplary
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`be described in the context of a Long-Term Evolution {LTE) system. Those skilled in the
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`art will appreciate, however, that the present invention is more generally applicable to
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`other wireless communication systems, including Wideband Code-Division Multiple
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`Access (WCDMA) and WiMax (IEEE 802.16) systems.
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`(OFDM) in the downlinkMultiplexing [028]L TE uses Orthogonal Frequency Division
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`and Discrete Fourier Transform (DFT) spread OFDM in the uplink. The basic L TE
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`downlink physical resource can be viewed as a time-frequency grid. Fig. 2 illustrates a
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`portion of an exemplary OFDM time-frequency grid 50 for L TE. Generally speaking, the
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`time-frequency grid 50 is divided into one millisecond subframes. Each subframe
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`includes a number of OFDM symbols. For a normal cyclic prefix (CP) length, suitable for
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`use in situations where muitipath dispersfon is not expected to be extremely severe, a
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`subframe comprises fourteen OFDM symbols. A subframe comprises twelve OFDM
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`symbols if an extended cyclic prefix is used. In the frequency domain, the physical
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`resources are divided into adjacent subcarriers with a spacing of 15 kHz. The number of
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`subcarriers varies according to tbe allocated system bandwidth. The smallest eler:nent
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`of the time-frequency grid 50 is a resource element. A resource element comprises one
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`OFDM subcarrier during one OFDM symbol interval.
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`over a downlinkto the user terminals [029]In L TE systems, data is transmitted
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`transport channel known as the Physical Downlink Shared Channel (POSCH). The
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`POSCH is a time and frequency multiplexed channel shared by a plurality of user
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`Apple EX1005 Page 12
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`terminals. As shown in Fig. 3, the downlink transmissions are organized into 10 ms
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`radio frames. Each radio frame comprises ten equally-sized subframes. For purposes
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`of scheduling users to receive downlink transmissions, the downlink time-frequency
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`resources are allocated in units called resource blocks (RBs ). Each resource block
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`spans twelve subcarriers (which may be adjacent or distributed across the frequency
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`spectrum) and one 0.5 ms slot (one half of one subframe). The term "resource block
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`pair" refers to two consecutive resource blocks occupying an entire one millisecond
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`subframe.
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`to the usertransmissions schedules downlink [030]The base station 20 dynamically
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`terminals based on channel state and quality information (CSI, CQI) reports from the
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`user terminals on the Physical Uplink Control Channel (PUCCH) or Physical Uplink
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`Shared Channel (PUSCH). The CQI and CSI reports indicate the instantaneous channel
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`conditions as seen by the receiver. In each subframe, the base station 20 transmits
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`downlink control information (DCI) identifying the user terminals that have been
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`scheduled to receive data (hereinafter the scheduled terminals) in the current downlink
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`subframe and the resource blocks on which the data is being transmitted to the
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`scheduied ierrninais. The DCi is typicaiiy transmitted on the Physicai Downiink Controi
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`Channel (PDCCH) in the first 1, 2, or 3 OFDM symbols in each subframe.
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`errors that occur(HARQ) is used to mitigate [031]Hybrid Automatic Repeat Request
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`during transmission of data on the downlink. When the base station 20 indicates that a
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`user terminal 100 is scheduled to receive a transmission on the POSCH, the user
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`terminal 100 decodes the POSCH and transmits an acknowledgement (ACK/NACK
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`message to base station 20 on the PUCCH or PUSCH. The acknowledgement
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`message informs the base station 20 whether the data packet was correctly received by
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`the user terminal 100. The acknowledgement message could be either a positive
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`acknowledgement (ACK) indicating a successful decoding or a negative
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`IPR2022-00648
`Apple EX1005 Page 13
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`acknowledgement (NACK) message indicating a decoding failure. Based on the
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`acknowledgement message received from the user terminal 100, base station 20
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`determines whether to transmit new data (ACK received) or to retransmit the previous
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`data (NACK received).
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`(SRs)requests scheduling the user terminals transmit [032]For uplink transmissions,
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`to the base station 20 on the PUCCH when the user terminals have data to send but no
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`valid uplink grant. The base stations 20 allocate uplink resources responsive to the
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`scheduling requests and transmit a scheduling grant to the user terminal 100 on the
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`PDCCH. When the data is received, the base station 20 transmits ACK/NACK signaling
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`to the user terminal 100 on the Physical Hybrid Automatic Repeat Request Indicator
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`Channel. (PHICH) to indicate whether the data is received correctly.
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`for dataan uplink resource [033]If the user terminal 100 has not been assigned
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`transmission, the L 1/L2 control information (CQI reports, ACK/NACKs, and SRs) is
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`transmitted in uplink resources (resource blocks) specifically assigned for uplink
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`transmission of L 1/L2 control information on the Physical Uplink Control Channel
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`(PUCCH). As illustrated in Fig. 4, these resources are located at the edges of the total
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`availabie (;eii bandwrdH,1. Each PUCCH resource cornprises of one resource biock
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`(twelve subcarriers) within each of the two slots of an uplink subframe. Frequency
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`hopping is used to provide frequency diversity. The frequency of the resource blocks
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`alternate at the slot boundary, with one resource block at the upper part of the spectrum
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`within the first slot of a subframe and an equally sized r_esource block at the lower part of
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`the spectrum during the second slot of the subframe, or vice versa. If more resources
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`are needed for the uplink L 1/L2 control signaling, e.g., in case of very large overall
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`transmission bandwidth supporting a large number of users, additional resources blocks
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`can be assigned adjacent the previously assigned resource blocks.
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`9
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`IPR2022-00648
`Apple EX1005 Page 14
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`[034]The reasons for loca