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US 10,757,649 B2Granted
Assisting measurements in small cells with an on/off scheme
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsDaniel Larsson, Ali Behravan, Muhammad Kazmi
Life of this patent
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Abstract
Techniques are provided to ensure that a terminal device is able to perform measurements efficiently when an on/off scheme is used by network nodes, particularly in a heterogeneous network environment. An example method, implemented in a network node, comprises obtaining a discovery signal window pattern, the discovery signal window pattern defining one or more discovery signal windows during which each of a plurality of cells is to transmit a corresponding discovery signal, and sending an indication of the discovery signal window pattern to a terminal device.
Claims16
A method, in a network node, comprising:
- obtaining a discovery signal window pattern, the discovery signal window pattern defining periodic discovery signal windows during which a plurality of cells is to transmit respective discovery signals;
- sending an indication of the discovery signal window pattern to a terminal device, wherein sending the indication comprises sending one or more parameters that specify at least the following:
- a discovery signal window duration in number of subframes;
- a discovery signal window periodicity;
- and a discovery signal window starting time based on a system frame number, and
- transmitting respective discovery signals in a first and a second cell, wherein the second cell's discovery signal is transmitted with a time shift with regards to the first cell's discovery signal within the discovery signal window.
3 more elements
A method, in a terminal device, comprising:
- receiving an indication of a discovery signal window pattern from a network node, the discovery signal window pattern defining periodic discovery signal windows during which a plurality of cells is to transmit respective discovery signals, wherein receiving the indication comprises receiving one or more parameters that specify at least the following:
- a discovery signal window duration in number of subframes;
- a discovery signal window periodicity;
- and a discovery signal window starting time based on a system frame number;
- and
- performing, based on a respective discovery signal within a discovery signal window, a measurement in each of a first and a second cell of the plurality of cells, wherein the second cell's discovery signal is received with a time shift with regards to the first cell's discovery signal within the discovery signal window.
3 more elements
A network node comprising:
- a communications interface circuit configured to send and receive data to and from one or more other nodes;
- and
- a processing circuit operatively coupled to the communications interface circuit and configured to:
- obtain a discovery signal window pattern, the discovery signal window pattern defining periodic discovery signal windows during which a plurality of cells is to transmit respective discovery signals,
- send an indication of the discovery signal window pattern to a terminal device, wherein sending the indication comprises sending one or more parameters that specify at least the following:
- a discovery signal window duration in number of subframes;
- a discovery signal window periodicity;
- and a discovery signal window starting time based on a system frame number, and
- transmit respective discovery signals in a first and a second cell, wherein the second cell's discovery signal is transmitted with a time shift with regards to the first cell's discovery signal within the discovery signal window.
6 more elements
A terminal device, comprising:
- a transceiver circuit configured to communicate with one or more base stations;
- and
- a processing circuit operatively coupled to the transceiver circuit and configured to:
- receive an indication of a discovery signal window pattern from a network node, the discovery signal window pattern defining periodic discovery signal windows during which a plurality of cells is to transmit respective discovery signals, wherein receiving the indication comprises receiving one or more parameters that specify at least the following:
- a discovery signal window duration in number of subframes;
- a discovery signal window periodicity;
- and a discovery signal window starting time based on a system frame number, and
- perform, based on a respective discovery signal within a discovery signal window, a measurement in each of a first and a second cell of the plurality of cells, wherein the second cell's discovery signal is received with a time shift with regards to the first cell's discovery signal within the discovery signal window.
5 more elements
A non-transitory computer-readable medium comprising, stored thereupon, a computer program product comprising program instructions that, when executed by a network node in a communications network, cause the network node to:
- obtain a discovery signal window pattern, the discovery signal window pattern defining periodic discovery signal windows during which a plurality of cells is to transmit respective discovery signals;
- send an indication of the discovery signal window pattern to a terminal device, wherein sending the indication comprises sending one or more parameters that specify at least the following:
- a discovery signal window duration in number of subframes;
- a discovery signal window periodicity;
- and a discovery signal window starting time based on a system frame number, and
- transmit respective discovery signals in a first and a second cell, wherein the second cell's discovery signal is transmitted with a time shift with regards to the first cell's discovery signal within the discovery signal window.
3 more elements
A non-transitory computer-readable medium comprising, stored thereupon, a computer program product comprising program instructions that, when executed by a terminal device operating in a communications network, cause the terminal device to:
- receive an indication of a discovery signal window pattern from a network node, the discovery signal window pattern defining periodic discovery signal windows during which a plurality of cells is to transmit respective discovery signals, wherein receiving the indication comprises receiving one or more parameters that specify at least the following:
- a discovery signal window duration in number of subframes;
- a discovery signal window periodicity;
- and a discovery signal window starting time based on a system frame number;
- and
- perform, based on a respective discovery signal within a discovery signal window, a measurement in each of a first and a second cell of the plurality of cells, wherein the second cell's discovery signal is received with a time shift with regards to the first cell's discovery signal within the discovery signal window.
3 more elements
Dependencies are inferred from the claim text.