Transmission of scheduling assignments in multiple operating bandwidths
First Claim
1. A method for transmitting a plurality of Scheduling Assignments (SA) through a downlink control channel by a Node B in a wireless communication system supporting carrier aggregation, the method comprising the steps of:
- transmitting to a User Equipment (UE) a first SA intended for a first Component Carrier (CC) using a first set of Control Channel Elements (CCEs); and
transmitting to the UE a second SA intended for a second CC using a second set of CCEs,wherein a location of the second set of CCEs is determined from a location of the first set of CCEs, andwherein a location of a first CCE included in the second set of CCEs is shifted by a predetermined number of CCEs relative to a location of a first CCE included in the first set of CCEs, andwherein the location of the first CCE included in the second set of CCEs, shifted from the location of the first CCE included in the first set of CCEs, is determined by using a CC indicator.
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Abstract
Methods and apparatuses are described for the transmission of Scheduling Assignments (SAs) from a base station to User Equipments (UEs) for data reception in the downlink or data transmission in the uplink of a communication system consisting of multiple Component Carriers (CCs). The SAs are separately coded and transmitted using elementary units (Control Channel Elements or CCEs). Locations of CCEs determine whether an SA is intended for a first CC or for a second CC. Further, the location of CCEs for an SA intended for a first CC is used to determine locations of CCEs for an SA intended for a second CC.
16 Citations
12 Claims
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1. A method for transmitting a plurality of Scheduling Assignments (SA) through a downlink control channel by a Node B in a wireless communication system supporting carrier aggregation, the method comprising the steps of:
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transmitting to a User Equipment (UE) a first SA intended for a first Component Carrier (CC) using a first set of Control Channel Elements (CCEs); and transmitting to the UE a second SA intended for a second CC using a second set of CCEs, wherein a location of the second set of CCEs is determined from a location of the first set of CCEs, and wherein a location of a first CCE included in the second set of CCEs is shifted by a predetermined number of CCEs relative to a location of a first CCE included in the first set of CCEs, and wherein the location of the first CCE included in the second set of CCEs, shifted from the location of the first CCE included in the first set of CCEs, is determined by using a CC indicator. - View Dependent Claims (2, 3)
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4. An apparatus for transmitting a plurality of Scheduling Assignments (SA) through a downlink control channel by a Node B in a wireless communication system supporting carrier aggregation, the apparatus comprising:
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a transmitter for transmitting an SA to a User Equipment (UE); and a controller for controlling operations of transmitting to the LIE a first SA intended for a first Component Carrier (CC) using a first set of Control Channel Elements (CCEs), and transmitting to the UE a second SA intended for a second CC using a second set of CCEs, wherein a location of the second set of CCEs is determined from a location of the first set of CCEs, wherein a location of a first CCE included in the second set of CCEs is shifted by a predetermined number of CCEs relative to a location of a first CCE included in the first set of CCEs, and wherein the location of the first CCE included in the second set of CCEs, shifted from the location of the first CCE included in the first set of CCEs, is determined by using a CC indicator. - View Dependent Claims (5, 6)
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7. A method for searching a plurality of Scheduling Assignments (SA) through a downlink control channel by a User Equipment (UE) in a wireless communication system supporting carrier aggregation, the method comprising the steps of:
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searching a first SA, intended for a first Component Carrier (CC), transmitted from a Node B by using a first set of Control Channel Elements (CCEs); and searching a second SA, intended for a second CC, transmitted from the Node B by using a second set of CCEs, wherein a location of the second set of CCEs is determined from the location of the first set of CCEs, wherein a location of a first CCE included in the second set of CCEs is shifted by a predetermined number of CCEs relative to a location of a first CCE included in the first set of CCEs, and wherein the location of the first CCE included in the second set of CCEs, shifted from the location of the first CCE included in the first set of CCEs, is determined by using a CC indicator. - View Dependent Claims (8, 9)
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10. A User Equipment (UE) for searching a plurality of Scheduling Assignments (SA) through a downlink control channel in a wireless communication system supporting carrier aggregation, the UE comprising:
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a receiver for receiving a signal from a Node B; and a controller for controlling operations of searching a first SA, intended for a first Component Carrier (CC), transmitted from the Node B by using a first set of Control Channel Elements (CCEs), and searching a second SA, intended for a second CC, transmitted from the Node B by using a second set of CCEs, wherein a location of the second set of CCEs is determined from the location of the first set of CCEs, wherein a location of a first CCE included in the second set of CCEs is shifted by a predetermined number of CCEs relative to a location of a first CCE included in the first set of CCEs, and wherein the location of the first CCE included in the second set of CCEs, shifted from the location of the first CCE included in the first set of CCEs, is determined by using a CC indicator. - View Dependent Claims (11, 12)
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Specification