Abstract
Systems and methods for controlling sounding reference signal transmission are provided; a user equipment starts transmitting the sounding reference signal in anticipation of uplink data transmission and then discontinues transmitting the sounding reference signal after completion of uplink data transmission.
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Specification Information
Specification Information
Technologies
Family Information
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Resource configuration Sounding reference signals(SRS) Transmission DRX/EDRX/DTX/EDTX
Product
User Equipment (UE/Terminal)
Use Cases
Wireless communication
Services
Transmitting/receiving data in uplink
Claim
1. A method of uplink reference signal transmission in a user equipment comprising:
controlling a receiver in the user equipment to use discontinuous reception associated with configured on periods and off periods;
maintaining a configuration of a set of sounding reference signal transmission resources;
transmitting a request for an uplink transmission resource during one of the off periods; and
transmitting a sounding reference signal transmission, using at least one of the set of sounding reference signal transmission resources associated with the configuration, responsive to transmitting the request for the uplink transmission resource.', 'controlling a receiver in the user equipment to use discontinuous reception associated with configured on periods and off periods;', 'maintaining a configuration of a set of sounding reference signal transmission resources;', 'transmitting a request for an uplink transmission resource during one of the off periods; and', 'transmitting a sounding reference signal transmission, using at least one of the set of sounding reference signal transmission resources associated with the configuration, responsive to transmitting the request for the uplink transmission resource.
2. The method of claim 1 further comprising:
receiving signaling to configure the user equipment to be able to transmit, irrespective of the on and off periods of the receiver, the request for the uplink transmission resource.', 'receiving signaling to configure the user equipment to be able to transmit, irrespective of the on and off periods of the receiver, the request for the uplink transmission resource.
3. The method of claim 1 wherein transmitting the request for an uplink transmission resource comprises transmitting the request using an assigned scheduling request channel.
4. The method of claim 1 wherein transmitting a request for an uplink transmission resource comprises transmitting a request for uplink transmission using a previously assigned semi-persistent resource.
5. The method of claim 1 wherein transmitting a request for an uplink transmission resource comprises transmitting a request for uplink transmission using a contention based access channel.
6. The method of claim 1 further comprising:
transmitting sounding reference signal transmissions for uplink timing alignment and for uplink channel quality assessment.', 'transmitting sounding reference signal transmissions for uplink timing alignment and for uplink channel quality assessment.
7. The method of claim 6 further comprising:
receiving signaling that allocates sounding reference signal transmission opportunities for uplink timing alignment and sounding reference signal transmission opportunities for uplink channel quality assessment;
transmitting sounding reference signal transmissions for uplink timing alignment in accordance with the signaling;
transmitting sounding reference signal transmissions for uplink channel quality assessment in accordance with the signaling;
wherein transmitting sounding reference signal transmissions for uplink timing alignment in accordance with the signaling and transmitting sounding reference signal transmissions for uplink channel quality assessment in accordance with the signaling comprises transmitting a single sounding reference signal transmission for both uplink timing alignment and uplink channel quality assessment for any sounding reference signal transmission opportunities for uplink timing alignment that coincide with sounding reference signal transmission opportunities for uplink channel quality assessment.', 'receiving signaling that allocates sounding reference signal transmission opportunities for uplink timing alignment and sounding reference signal transmission opportunities for uplink channel quality assessment;', 'transmitting sounding reference signal transmissions for uplink timing alignment in accordance with the signaling;', 'transmitting sounding reference signal transmissions for uplink channel quality assessment in accordance with the signaling;', 'wherein transmitting sounding reference signal transmissions for uplink timing alignment in accordance with the signaling and transmitting sounding reference signal transmissions for uplink channel quality assessment in accordance with the signaling comprises transmitting a single sounding reference signal transmission for both uplink timing alignment and uplink channel quality assessment for any sounding reference signal transmission opportunities for uplink timing alignment that coincide with sounding reference signal transmission opportunities for uplink channel quality assessment.
8. The method of claim 6 further comprising:
receiving signaling that contains a definition of sounding reference signal transmission opportunities to be made available for one or both of channel quality assessment and timing alignment, the information identifying a minimum period for transmission of the sounding reference signal for channel quality assessment and/or a minimum period for transmission of the sounding reference signal for timing alignment;
transmitting sounding reference signal transmissions in accordance with the definition of transmission opportunities, and subject to the minimum period(s), such that whenever possible a single sounding reference signal is sent for both channel quality assessment and timing alignment.', 'receiving signaling that contains a definition of sounding reference signal transmission opportunities to be made available for one or both of channel quality assessment and timing alignment, the information identifying a minimum period for transmission of the sounding reference signal for channel quality assessment and/or a minimum period for transmission of the sounding reference signal for timing alignment;', 'transmitting sounding reference signal transmissions in accordance with the definition of transmission opportunities, and subject to the minimum period(s), such that whenever possible a single sounding reference signal is sent for both channel quality assessment and timing alignment.
9. A user equipment comprising:
a receive module controlled to use discontinuous reception associated with configured on periods and off periods; and
a transmit module configured to:
maintain a configuration of a set of sounding reference signal transmission resources,
transmit a request for an uplink transmission resource during one of the off periods, and
transmit a sounding reference signal transmission, using at least one of the set of sounding reference signal transmission resources associated with the configuration, responsive to transmitting a request for the uplink transmission resource.', 'a receive module controlled to use discontinuous reception associated with configured on periods and off periods; and', 'a transmit module configured to:
maintain a configuration of a set of sounding reference signal transmission resources,
transmit a request for an uplink transmission resource during one of the off periods, and
transmit a sounding reference signal transmission, using at least one of the set of sounding reference signal transmission resources associated with the configuration, responsive to transmitting a request for the uplink transmission resource.', 'maintain a configuration of a set of sounding reference signal transmission resources,', 'transmit a request for an uplink transmission resource during one of the off periods, and', 'transmit a sounding reference signal transmission, using at least one of the set of sounding reference signal transmission resources associated with the configuration, responsive to transmitting a request for the uplink transmission resource
10. The user equipment of claim 9, the transmit module further configured to:
receive signaling to configure the user equipment to be able to transmit, irrespective of the on and off periods of the receiver, the request for the uplink transmission resource.', 'receive signaling to configure the user equipment to be able to transmit, irrespective of the on and off periods of the receiver, the request for the uplink transmission resource.11. The user equipment of claim 9 wherein transmitting the request for an uplink transmission resource comprises transmitting the request using an assigned scheduling request channel.12. The user equipment of claim 9 wherein transmitting a request for an uplink transmission resource comprises transmitting a request for uplink transmission using a previously assigned semi-persistent resource.13. The user equipment of claim 9 wherein transmitting a request for an uplink transmission resource comprises transmitting a request for uplink transmission using a contention based access channel.14. The user equipment of claim 9, the transmit module further configured to:
transmit sounding reference signal transmissions for uplink timing alignment and for uplink channel quality assessment.', 'transmit sounding reference signal transmissions for uplink timing alignment and for uplink channel quality assessment.15. The user equipment of claim 14, the transmit module further configured to:
receive signaling that allocates sounding reference signal transmission opportunities for uplink timing alignment and sounding reference signal transmission opportunities for uplink channel quality assessment;
transmit sounding reference signal transmissions for uplink timing alignment in accordance with the signaling;
transmit sounding reference signal transmissions for uplink channel quality assessment in accordance with the signaling;
wherein transmitting sounding reference signal transmissions for uplink timing alignment in accordance with the signaling and transmitting sounding reference signal transmissions for uplink channel quality assessment in accordance with the signaling comprises transmitting a single sounding reference signal transmission for both uplink timing alignment and uplink channel quality assessment for any sounding reference signal transmission opportunities for uplink timing alignment that coincide with sounding reference signal transmission opportunities for uplink channel quality assessment.', 'receive signaling that allocates sounding reference signal transmission opportunities for uplink timing alignment and sounding reference signal transmission opportunities for uplink channel quality assessment;', 'transmit sounding reference signal transmissions for uplink timing alignment in accordance with the signaling;', 'transmit sounding reference signal transmissions for uplink channel quality assessment in accordance with the signaling;', 'wherein transmitting sounding reference signal transmissions for uplink timing alignment in accordance with the signaling and transmitting sounding reference signal transmissions for uplink channel quality assessment in accordance with the signaling comprises transmitting a single sounding reference signal transmission for both uplink timing alignment and uplink channel quality assessment for any sounding reference signal transmission opportunities for uplink timing alignment that coincide with sounding reference signal transmission opportunities for uplink channel quality assessment.16. The user equipment of claim 14, the transmit module further configured to:
receive signaling that contains a definition of sounding reference signal transmission opportunities to be made available for one or both of channel quality assessment and timing alignment, the information identifying a minimum period for transmission of the sounding reference signal for channel quality assessment and/or a minimum period for transmission of the sounding reference signal for timing alignment;
transmit sounding reference signal transmissions in accordance with the definition of transmission opportunities, and subject to the minimum period(s), such that whenever possible a single sounding reference signal is sent for both channel quality assessment and timing alignment.', 'receive signaling that contains a definition of sounding reference signal transmission opportunities to be made available for one or both of channel quality assessment and timing alignment, the information identifying a minimum period for transmission of the sounding reference signal for channel quality assessment and/or a minimum period for transmission of the sounding reference signal for timing alignment;', 'transmit sounding reference signal transmissions in accordance with the definition of transmission opportunities, and subject to the minimum period(s), such that whenever possible a single sounding reference signal is sent for both channel quality assessment and timing alignment.17. The method of claim 1, wherein said transmitting the sounding reference signal transmission occurs as a result of said transmitting the request for the uplink transmission resource.18. The method of claim 1, wherein the set of sounding reference signal transmissions repeat periodically.19. The method of claim 18, further comprising starting an inactivity timer upon reception of an uplink transmission resource grant.
20. The method of claim 19, further comprising transmitting a sounding reference signal transmission in at least one of the set of sounding reference signal transmission resources until the inactivity timer expires.
21. The method of claim 18, further comprising determining a time period for retransmissions.
22. The method of claim 20, further comprising transmitting a sounding reference signal transmission in at least one of the set of sounding reference signal transmission resources until the determined time period ends.']
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