Secondary cell sounding transmission
First Claim
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1. A method comprising:
- a) receiving, by a wireless device, at least one control message from a base station, said at least one control message causing in said wireless device;
i) configuration of a plurality of cells comprising a primary cell and at least one secondary cell;
ii) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising;
(1) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising said primary cell, uplink transmissions by said wireless device in said primary cell group employing a first synchronization signal transmitted on said primary cell as a primary timing reference; and
(2) a secondary cell group comprising a second subset of said at least one secondary cell; and
iii) configuration of transmissions of sounding reference signals on a secondary cell in said secondary cell group;
b) receiving, by said wireless device, an activation command to activate said secondary cell in said wireless device;
c) receiving, by said wireless device, a control command configured to cause transmission of a random access preamble on random access resources of one of said at least one secondary cell in said second subset;
d) receiving, by said wireless device, a random access response, said random access response comprising a timing advance command for said secondary cell group;
e) transmitting, by said wireless device, one or more of said sounding reference signals on said secondary cell after applying said timing advance command to said secondary cell group, said wireless device configured to not transmit any of said sounding reference signals on said secondary cell during a period;
i) between receiving said activation command and applying said timing advance command;
orii) when said secondary cell is inactive;
oriii) when a time alignment timer for said secondary cell group is not running; and
f) dropping, by said wireless device, transmission of a sounding reference signal in said sounding reference signals in a subframe of said secondary cell when said wireless device is power limited in said subframe.
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Abstract
A wireless device receives message(s) configuring transmissions of sounding reference signals on a secondary cell in a secondary cell group. The wireless device receives an activation command to activate the secondary cell. The wireless device transmits the sounding reference signals if the secondary cell is activated, a timing advance command is applied to the secondary cell group, and a time alignment timer for the secondary cell group is running. The wireless device is configured to not transmit the sounding reference signals on the secondary cell during the period between receiving the activation command and applying the timing advance command.
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Citations
18 Claims
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1. A method comprising:
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a) receiving, by a wireless device, at least one control message from a base station, said at least one control message causing in said wireless device; i) configuration of a plurality of cells comprising a primary cell and at least one secondary cell; ii) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising; (1) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising said primary cell, uplink transmissions by said wireless device in said primary cell group employing a first synchronization signal transmitted on said primary cell as a primary timing reference; and (2) a secondary cell group comprising a second subset of said at least one secondary cell; and iii) configuration of transmissions of sounding reference signals on a secondary cell in said secondary cell group; b) receiving, by said wireless device, an activation command to activate said secondary cell in said wireless device; c) receiving, by said wireless device, a control command configured to cause transmission of a random access preamble on random access resources of one of said at least one secondary cell in said second subset; d) receiving, by said wireless device, a random access response, said random access response comprising a timing advance command for said secondary cell group; e) transmitting, by said wireless device, one or more of said sounding reference signals on said secondary cell after applying said timing advance command to said secondary cell group, said wireless device configured to not transmit any of said sounding reference signals on said secondary cell during a period; i) between receiving said activation command and applying said timing advance command;
orii) when said secondary cell is inactive;
oriii) when a time alignment timer for said secondary cell group is not running; and f) dropping, by said wireless device, transmission of a sounding reference signal in said sounding reference signals in a subframe of said secondary cell when said wireless device is power limited in said subframe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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a) receiving, by a wireless device, at least one control message from a base station, said at least one control message causing in said wireless device; i) configuration of a plurality of cells comprising a primary cell and at least one secondary cell; and ii) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising; (1) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising said primary cell, uplink transmissions by said wireless device in said primary cell group employing a first synchronization signal transmitted on said primary cell as a primary timing reference; and (2) a secondary cell group comprising a second subset of said at least one secondary cell; b) receiving, by said wireless device, an activation command to activate said secondary cell in said wireless device; c) receiving, by said wireless device, a control command configured to cause transmission of a random access preamble on random access resources of one of said at least one secondary cell in said second subset; d) receiving, by said wireless device, a random access response, said random access response comprising a timing advance command for said secondary cell group; e) receiving, by said wireless device, a second control message from said base station, said second control message causing in said wireless device configuration of transmissions of sounding reference signals on a secondary cell in said secondary cell group; f) transmitting, by said wireless device, one or more of said sounding reference signals on said secondary cell after applying said timing advance command to said secondary cell group, said wireless device configured to not transmit any of said sounding reference signals on said secondary cell during a period; i) between receiving said activation command and applying said timing advance command;
orii) when said secondary cell is inactive;
oriii) when a time alignment timer for said secondary cell group is not running; and g) dropping, by said wireless device, transmission of a sounding reference signal in said sounding reference signals in a subframe of said secondary cell when said wireless device is power limited in said subframe. - View Dependent Claims (11, 12, 13, 14)
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15. A wireless device comprising:
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a) one or more communication interfaces; b) one or more processors; and c) memory storing instructions that, when executed, cause said wireless device to; i) receive at least one control message from a base station, said at least one control message causing in said wireless device; (1) configuration of a plurality of cells comprising a primary cell and at least one secondary cell; (2) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising; (a) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising said primary cell, uplink transmissions by said wireless device in said primary cell group employing a first synchronization signal transmitted on said primary cell as a primary timing reference; and (b) a secondary cell group comprising a second subset of said at least one secondary cell; and (3) transmissions of sounding reference signals on a secondary cell in said secondary cell group; and ii) receive an activation command to activate said secondary cell in said wireless device; iii) receive a control command configured to cause transmission of a random access preamble on random access resources of one of said at least one secondary cell in said second subset; iv) receive a random access response, said random access response comprising a timing advance command for said secondary cell group; v) transmit one or more of said sounding reference signals on said secondary cell after applying said timing advance command to said secondary cell group, said wireless device configured to not transmit any of said sounding reference signals on said secondary cell during a period; (1) between receiving said activation command and applying said timing advance command;
or(2) when said secondary cell is inactive;
or(3) when a time alignment timer for said secondary cell group is not running; and vi) drop transmission of a sounding reference signal in said sounding reference signals in a subframe of said secondary cell when said wireless device is power limited in said subframe. - View Dependent Claims (16, 17, 18)
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Specification