US 9,312,998 B2Granted

Filter-based guardband determination and subcarrier selection

AssigneeT-Mobile USA, Inc.

InventorsBrian Allan Olsen, Pablo Tapia

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Abstract

Techniques for determining a guardband for a frequency channel based at least in part on a roll-off of a filter or a type of a filter are described herein. The filter may be a filter of a base station and the frequency channel may be used for transmissions from the base station to a mobile device. Alternatively, the filter may be a filter of a mobile device and the frequency channel may be used for transmissions from the mobile device to the base station. Further, because different filters of different mobile devices may have different roll-offs or types of filters, different guardbands may be determined for different mobile devices communicating over a same frequency channel. Upon determining the guardband, a base station may select a subcarrier based at least in part on the determined guardband.

Claims16

Dependent claims

A base station comprising:

one or more processors;
a radio communicatively coupled to the one or more processors, the radio including a filter associated with at least one of a filter type and a roll-off;
a guardband determination module configured to be operated by the one or more processors to perform operations including:
determining the roll-off of the filter of the base station or the filter type of the filter of the base station;
determining a first guardband for a first frequency channel based at least in part on the roll-off of the filter of the base station or the filter type of the filter of the base station;
receiving, from a mobile device, an indication of a roll-off of a filter of the mobile device or a type of the filter of the mobile device;
and
determining a second guardband for a second frequency channel based at least in part on the roll-off of the filter of the mobile device or the type of the filter of the mobile device;
and
a scheduler, wherein the guardband determination module is a component of the scheduler, and the scheduler is configured to be operated by the one or more processors to perform operations including:
selecting a first subcarrier for transmissions from the base station to the mobile device based at least in part on the determined first guardband for the first frequency channel;
selecting a second subcarrier for transmissions from the mobile device to the base station based at least in part on the determined second guardband for the second frequency channel;
and
instructing the mobile device to utilize the selected second subcarrier.

11 more elements

One or more non-transitory computer-readable media having stored thereon a plurality of computer-executable instructions which, when executed by a base station of a telecommunication network, cause the base station to perform operations comprising:

determining a roll-off of a filter of the base station or a type of the filter;
determining a guardband for a frequency channel based at least in part on the roll-off or the type of the filter;
and
selecting a subcarrier for transmissions from the base station to a mobile device based at least in part on the determined guardband for the frequency channel, wherein the selecting comprises determining a portion of a channel to be available for subcarrier selection based at least in part on the determined guardband and selecting the subcarrier within the available portion of the channel.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 14/042,510Filed 30 Sep 2013
Published: US 2015/0092677 A12 Apr 2015
Granted: 12 Apr 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H04L 5/0058
Arrangements for allocating sub-channels of the transmission path: allocation criteria
H04L 5/0044
Arrangements for allocating sub-channels of the transmission path: allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH
H04L 5/0066
Allocation criteria: requirements on out-of-channel emissions
H04L 5/0073
Allocation criteria: allocation arrangements that take into account other cell interferences