Uplink sounding transmission with carrier aggregation
First Claim
Patent Images
1. A wireless device comprising:
- 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 message to cause;
(1) assignment of a secondary cell to a secondary cell group in a plurality of cell groups comprising a primary cell group and said secondary cell group; and
(2) configuration of transmissions of sounding reference signals (SRSs) on said secondary cell;
ii) receive a control command to cause transmission of a random access preamble in said secondary cell group;
iii) receive a random access response comprising a timing advance command for said secondary cell group;
iv) transmit one or more of said SRSs 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 SRSs on said secondary cell during a period between receiving said at least one message and applying said timing advance command to said secondary cell group; and
v) drop transmission of an SRS in said SRSs 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 transmits one or more of the sounding reference signals on the secondary cell after applying a timing advance command to the secondary cell group. The wireless device is configured to not transmit any of the sounding reference signals on the secondary cell during a period between receiving the message(s) and applying the timing advance command to the secondary cell group.
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Citations
30 Claims
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1. 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 message to cause; (1) assignment of a secondary cell to a secondary cell group in a plurality of cell groups comprising a primary cell group and said secondary cell group; and (2) configuration of transmissions of sounding reference signals (SRSs) on said secondary cell; ii) receive a control command to cause transmission of a random access preamble in said secondary cell group; iii) receive a random access response comprising a timing advance command for said secondary cell group; iv) transmit one or more of said SRSs 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 SRSs on said secondary cell during a period between receiving said at least one message and applying said timing advance command to said secondary cell group; and v) drop transmission of an SRS in said SRSs 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)
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9. A method for use in a wireless device, the method performed under processor control the method comprising:
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a) receiving at least one message causing; i) assignment of a secondary cell to a secondary cell group in a plurality of cell groups comprising a primary cell group and said secondary cell group; and ii) configuration of transmissions of sounding reference signals (SRSs) on said secondary cell; b) receiving a control command causing transmission of a random access preamble in said secondary cell group; c) receiving a random access response comprising a timing advance command for said secondary cell group; d) transmitting one or more of said SRSs 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 SRSs on said secondary cell during a period between receiving said at least one message and applying said timing advance command to said secondary cell group; and e) dropping transmission of an SRS in said SRSs in a subframe of said secondary cell when said wireless device is power limited in said subframe. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A base station 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 base station to; i) transmit to a wireless device at least one message to cause; (1) assignment of a secondary cell to a secondary cell group in a plurality of cell groups comprising a primary cell group and said secondary cell group; and (2) configuration of transmissions of sounding reference signals (SRSs) on said secondary cell; ii) transmit a control command to cause transmission of a random access preamble in said secondary cell group; iii) transmit a random access response comprising a timing advance command for said secondary cell group; and iv) receive one or more of said SRSs on said secondary cell after said timing advance command is applied to said secondary cell group, wherein; (1) said base station does not receive any of said SRSs on said secondary cell during a period after transmitting said at least one message and before said timing advance command is applied to said secondary cell group; and (2) transmission of an SRS in said SRSs is dropped in a subframe of said secondary cell when said wireless device is power limited in said subframe. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A method for use in a base station the method performed under processor control, the method comprising:
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a) transmitting to a wireless device at least one message causing; i) assignment of a secondary cell to a secondary cell group in a plurality of cell groups comprising a primary cell group and said secondary cell group; and ii) configuration of transmissions of sounding reference signals (SRSs) on said secondary cell; b) transmitting a control command causing transmission of a random access preamble in said secondary cell group; c) transmitting a random access response comprising a timing advance command; and d) receiving one or more of said SRSs on said secondary cell after said timing advance command is applied to said secondary cell group, wherein; i) said base station does not receive any of said SRSs on said secondary cell during a period after transmitting said at least one message and before said timing advance command is applied to said secondary cell group; and ii) transmission of an SRS in said SRSs is dropped in a subframe of said secondary cell when said wireless device is power limited in said subframe. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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Specification