Reciprocal channel sounding reference signal allocation and configuration
First Claim
1. A method of wireless communication, comprising:
- including, by a base station, an elongated duration for a sounding reference signal (SRS) in configuration information, the elongated duration for an uplink SRS transmission including and extending beyond an allotted uplink period of a first subframe;
transmitting, by the base station to a user equipment (UE), a request for the SRS, wherein the request for the SRS includes the configuration information; and
receiving, by the base station from the UE, the SRS with the elongated duration as a continuous SRS burst.
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Accused Products
Abstract
Systems and techniques are disclosed to enhance the efficiency of available bandwidth between UEs and base stations. A UE transmits a sounding reference signal to the base station, which characterizes the uplink channel based on the SRS received and, using reciprocity, applies the channel characterization for the downlink channel. The base station may form the beam to the UE based on the uplink channel information obtained from the SRS. As the downlink channel changes the base station needs updated information to maintain its beamforming, meaning it needs a new SRS. Transmission of the SRS takes resources; to minimize this, the UE or the base station can determine a period during which the downlink channel will predictably remain coherent and set up a schedule for sending SRS. Alternatively, the UE or the base station can determine on demand that the channel is losing coherence and initiate an on demand SRS.
26 Citations
32 Claims
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1. A method of wireless communication, comprising:
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including, by a base station, an elongated duration for a sounding reference signal (SRS) in configuration information, the elongated duration for an uplink SRS transmission including and extending beyond an allotted uplink period of a first subframe; transmitting, by the base station to a user equipment (UE), a request for the SRS, wherein the request for the SRS includes the configuration information; and receiving, by the base station from the UE, the SRS with the elongated duration as a continuous SRS burst. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of wireless communication, comprising:
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including, by a base station, an elongated duration for a sounding reference signal (SRS) in configuration information, the elongated duration for an uplink SRS transmission greater than a duration of an allotted uplink period of a first subframe; transmitting, by the base station to a user equipment (UE), a request for the SRS, wherein the request for the SRS includes the configuration information; and receiving, by the base station from the UE, the SRS with the elongated duration as a plurality of SRS fragments. - View Dependent Claims (8, 9, 10)
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11. A method of wireless communication, comprising:
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receiving, by a user equipment (UE) from a base station, a request for a sounding reference signal (SRS), wherein the request for the SRS includes configuration information about the SRS, and wherein the configuration information includes an elongated duration for the SRS including and extending beyond an allotted uplink period of a first subframe; and transmitting, by the UE to the base station, the SRS with the elongated duration as a continuous SRS burst. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method of wireless communication, comprising:
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receiving, by a user equipment (UE) from a base station, a request for a sounding reference signal (SRS), wherein the request for the SRS includes configuration information about the SRS, and wherein the configuration information includes an elongated duration for an uplink SRS transmission greater than a duration of a first subframe; and transmitting, by the UE to the base station, the SRS with the elongated duration as a plurality of SRS fragments. - View Dependent Claims (18, 19, 20)
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21. A base station comprising:
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a processor configured to include an elongated duration for a sounding reference signal (SRS) in configuration information, the elongated duration for an uplink SRS transmission including and extending beyond an allotted uplink period of a first subframe; and a transceiver configured to; transmit, to a user equipment (UE), a request for the SRS, wherein the request for the SRS includes the configuration information; and receive, from the UE, the SRS with the elongated duration as a continuous SRS burst. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A user equipment (UE) comprising:
a transceiver configured to; receive, from a base station, a request for a sounding reference signal (SRS), wherein the request for the SRS includes configuration information about the SRS, and wherein the configuration information includes an elongated duration for the SRS including and extending beyond an allotted uplink period of a first subframe; and transmit, to the base station, the SRS with the elongated duration as a continuous SRS burst. - View Dependent Claims (28, 29, 30, 31, 32)
Specification