Transmission of measurement reports in a wireless communication system
First Claim
1. A method of operating a terminal device in a wireless telecommunications system in which downlink communications are made by a base station using a radio interface that spans a system frequency bandwidth and the terminal device is configured to receive at least some communications from the base station within a restricted subset of transmission resources selected from within the system frequency bandwidth, the restricted subset of transmission resources comprising a restricted bandwidth downlink channel having a channel bandwidth which is smaller than the system frequency bandwidth, the method comprising:
- measuring channel conditions across the system frequency bandwidth;
aperiodically transmitting, to the base station, first channel condition measurement reports for a plurality of frequencies across the system frequency bandwidth, the plurality of frequencies not comprising the restricted bandwidth downlink channel;
measuring channel conditions within the restricted bandwidth downlink channel; and
periodically transmitting, to the base station channel, second condition measurement reports for the restricted bandwidth downlink channel, whereina resolution of the first channel condition measurement reports is less than a resolution of the second channel condition measurement reports.
1 Assignment
0 Petitions
Accused Products
Abstract
A wireless telecommunications system including a base station and terminal device, supporting a virtual carrier mode with downlink communications made by the base station using a radio interface spanning a system frequency bandwidth while the terminal device can receive at least some communications from the base station within a restricted subset of transmission resources selected from within the system frequency bandwidth providing a restricted bandwidth downlink. The terminal device can measure channel conditions across the system frequency bandwidth and transmit corresponding measurement reports to the base station. Measurement reports for transmission resources not including the restricted bandwidth downlink channel may be aperiodic while measurement reports for transmission resources including the restricted bandwidth downlink channel may be periodic. Measurement reports for transmission resources not including the restricted bandwidth downlink channel may be based on a subset of the channel condition measurements selected because they are associated with relatively poor channel conditions.
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Citations
20 Claims
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1. A method of operating a terminal device in a wireless telecommunications system in which downlink communications are made by a base station using a radio interface that spans a system frequency bandwidth and the terminal device is configured to receive at least some communications from the base station within a restricted subset of transmission resources selected from within the system frequency bandwidth, the restricted subset of transmission resources comprising a restricted bandwidth downlink channel having a channel bandwidth which is smaller than the system frequency bandwidth, the method comprising:
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measuring channel conditions across the system frequency bandwidth; aperiodically transmitting, to the base station, first channel condition measurement reports for a plurality of frequencies across the system frequency bandwidth, the plurality of frequencies not comprising the restricted bandwidth downlink channel; measuring channel conditions within the restricted bandwidth downlink channel; and periodically transmitting, to the base station channel, second condition measurement reports for the restricted bandwidth downlink channel, wherein a resolution of the first channel condition measurement reports is less than a resolution of the second channel condition measurement reports. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A terminal device for use in a wireless telecommunications system in which downlink communications are made by a base station using a radio interface that spans a system frequency bandwidth and the terminal device is configured to receive at least some communications from the base station within a restricted subset of transmission resources selected from within the system frequency bandwidth, the restricted subset of transmission resources comprising a restricted bandwidth downlink channel having a channel bandwidth which is smaller than the system frequency bandwidth, wherein the terminal device is configured to:
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measure channel conditions across the system frequency bandwidth; aperiodically transmit, to the base station, first channel condition measurement reports for a plurality of frequencies across the system frequency bandwidth, the plurality of frequencies not comprising the restricted bandwidth downlink channel; measure channel conditions within the restricted bandwidth downlink channel; and periodically transmit, to the base station, second channel condition measurement reports for the restricted bandwidth downlink channel, wherein a resolution of the first channel condition measurement reports is less than a resolution of the second channel condition measurement reports.
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13. A terminal device in a wireless telecommunications system in which downlink communications are made by a base station using a radio interface that spans a system frequency bandwidth and the terminal device is configured to receive at least some communications from the base station within a restricted subset of transmission resources selected from within the system frequency bandwidth, the restricted subset of transmission resources comprising virtual carrier having a channel bandwidth which is smaller than the system frequency bandwidth, the terminal device comprising:
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circuitry configured to measure channel conditions across the system frequency bandwidth; aperiodically transmit, to the base station, first channel condition measurement reports for a plurality of frequencies across the system frequency bandwidth, the plurality of frequencies not comprising the virtual carrier; measure channel conditions within the virtual carrier; and periodically transmit, to the base station, second channel condition measurement reports for the virtual carrier, wherein a resolution of the first channel condition measurement reports is less than a resolution of the second channel condition measurement reports. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification