TELECOMMUNICATIONS APPARATUS AND METHODS
First Claim
1. A method of operating a base station in a wireless telecommunications system in which downlink communications are made by the base station using a radio interface that spans a system frequency bandwidth and supports at least some communications with at least some terminal devices within a plurality of restricted frequency bands which are narrower than and within the system frequency bandwidth, the method comprising:
- selecting a restricted frequency band to be used for downlink communications for a terminal device from among the plurality of restricted frequency bands based on an identifier for the terminal device; and
transmitting downlink communications to the terminal device within the selected restricted frequency band.
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Accused Products
Abstract
A wireless telecommunications system in which downlink communications are made using a radio interface that spans a system frequency bandwidth (host carrier) and supports at least some communications from a base station to least some terminal devices within a plurality of restricted frequency bands (virtual carriers) which are narrower than and within the system frequency bandwidth. A terminal device conveys an indication of its identity, e.g. an IMSI, to the base station during an initial connection procedure as the terminal device seeks to access the radio interface. The terminal device and the base station both determine a selected restricted frequency band from among the plurality of restricted frequency bands based on the identity of the terminal device in the same way. Thus the terminal device and the base station select the same restricted frequency band and can accordingly configure their respective transceivers to allow for downlink communications between them within the selected restricted frequency band.
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Citations
15 Claims
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1. A method of operating a base station in a wireless telecommunications system in which downlink communications are made by the base station using a radio interface that spans a system frequency bandwidth and supports at least some communications with at least some terminal devices within a plurality of restricted frequency bands which are narrower than and within the system frequency bandwidth, the method comprising:
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selecting a restricted frequency band to be used for downlink communications for a terminal device from among the plurality of restricted frequency bands based on an identifier for the terminal device; and transmitting downlink communications to the terminal device within the selected restricted frequency band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A base station for use in a wireless telecommunications system in which downlink communications are made by the base station using a radio interface that spans a system frequency bandwidth and supports at least some communications with at least some terminal devices within a plurality of restricted frequency bands which are narrower than and within the system frequency bandwidth, the base station comprising a processor unit and a transceiver unit, and wherein the processor unit is configured to select a restricted frequency band to be used for downlink communications with a terminal device from among the plurality of restricted frequency bands based on an identifier for the terminal device;
- and to configure the transceiver unit to transmit downlink communications to the terminal device within the selected restricted frequency band.
Specification