SRS transmission for positioning configured outside of the initial UL BWP in a disconnected state.

Abstract

Reduction of timing collisions between sounding reference signal (SRS) instances when a user equipment (UE) is in a radio resource control (RRC) inactive state and the SRS is configured to use an uplink (UL) bandwidth portion (BWP) that is different from a UL BWP of a message transmitted by the UE in the RRC inactive state. More specifically, embodiments may implement collision mitigation techniques and establish action times for canceling transmission of one or more SRS instances.

Claims

1. A method for correcting the transmission of a sounding reference signal (SRS) by user equipment (UE) while disconnected from a communication network, The UE receives a first message, which includes a first DL message, from a transmit / receive point (TRP) via a downlink (DL) BWP associated with an uplink (UL) bandwidth portion (BWP), while the UE is configured to transmit one or more SRS instances via an SRS BWP different from the UL BWP while the UE is disconnected from the communication network, (A) The SRS BWP and the DL BWP have a common center frequency, and the time difference between the reception of the first message and the scheduled transmission of the SRS instance is less than a first threshold time gap. (B) The SRS BWP and the BWP of the second message have the common center frequency, and the time difference between the scheduled transmission of the SRS instance and the second message is less than the first threshold time gap. (C) The SRS BWP and the DL BWP have different center frequencies, and the time difference between the reception of the first message and the scheduled transmission of the SRS instance is less than the SRS switching time of the UE. (D) The SRS BWP and the BWP of the second message have different center frequencies, and the time difference between the scheduled transmission of the SRS instance and the second message is less than the SRS switching time of the UE, (E) A physical random access channel (PRACH) is transmitted by the UE, Based on this determination, the scheduled transmission of the SRS instance among the one or more SRS instances is canceled, The first threshold time gap is shorter than the SRS switching time of the UE, and the second message includes a second DL message from the TRP or a UL message from the UE. method.

2. The method according to claim 1, wherein the first threshold time gap is based on the subcarrier spacing (SCS) configuration of the UL BWP or a separate SCS configuration provided to the UE.

3. The method according to claim 2, wherein the first threshold time gap is based on the number of symbols in an orthogonal frequency division multiplexing (OFDM) communication scheme.

4. The method according to claim 1, wherein if the scheduled transmission of the SRS instance is canceled based on the fact that the SRS BWP and the BWP of the second message have different center frequencies and the time difference between the scheduled transmission of the SRS instance and the second message is less than the SRS switching time of the UE, the method further comprises determining the time of the second message based on decoding the first message at the UE.

5. The method according to claim 4, wherein the first message is decoded at least by the SRS switching time prior to the scheduled transmission of the SRS instance.

6. The method according to claim 5, wherein the time difference between the reception of the first message and the scheduled transmission of the SRS instance is greater than the sum of (i) the length of time required for the UE to decode the first message and (ii) the SRS switching time preceding the scheduled transmission of the SRS instance.

7. The method according to claim 6, wherein the first message includes a physical downlink control channel (PDCCH) message or a physical downlink shared channel (PDSCH) message, and the second message includes a physical uplink control channel (PUCCH) message or a physical uplink shared channel (PUSCH) message.

8. The method according to claim 6, wherein the first message and the second message are transmitted as part of a PRACH process.

9. The method according to claim 8, wherein the first message includes MSG2, MSG2 PDCCH, MSG4, or MSG4 PDCCH, and the second message includes a PUCCH message having ACK / NAK of the first message.

10. The method according to claim 1, further comprising canceling transmissions of all of the one or more SRS instances after the scheduled transmission of the SRS instance.

11. The method according to claim 1, wherein the SRS includes an SRS for positioning.

12. The method according to claim 1, wherein the disconnected state includes a wireless resource control (RRC) idle state, an RRC inactive state, or a discontinuous reception (DRX) state.

13. User equipment (UE) for correcting the transmission of a sounding reference signal (SRS) while disconnected from a communication network, Transmitter and receiver, Memory and One or more processors connected to the transceiver and the memory in a manner that enables communication with them, The system includes, and the one or more processors, The transceiver receives a first message, including a first DL message, from a transmit / receive point (TRP) via a downlink (DL) BWP associated with an uplink (UL) bandwidth portion (BWP), while the UE is configured to transmit one or more SRS instances via an SRS BWP different from the UL BWP while the UE is disconnected from the communication network, (A) The SRS BWP and the DL BWP have a common center frequency, and the time difference between the reception of the first message and the scheduled transmission of the SRS instance is less than a first threshold time gap. (B) The SRS BWP and the BWP of the second message have the common center frequency, and the time difference between the scheduled transmission of the SRS instance and the second message is less than the first threshold time gap. (C) The SRS BWP and the DL BWP have different center frequencies, and the time difference between the reception of the first message and the scheduled transmission of the SRS instance is less than the SRS switching time of the UE. (D) The SRS BWP and the BWP of the second message have different center frequencies, and the time difference between the scheduled transmission of the SRS instance and the second message is less than the SRS switching time of the UE, (E) A physical random access channel (PRACH) is transmitted by the UE, Based on this determination, the scheduled transmission of the SRS instance among the one or more SRS instances is canceled. It is configured in such a way, The first threshold time gap is shorter than the SRS switching time of the UE, and the second message includes a second DL message from the TRP or a UL message from the UE. UE.

14. The UE according to claim 13, further configured to perform the method described in any one of claims 2 to 12.

15. A non-temporary computer-readable medium for storing instructions for correcting the transmission of a sounding reference signal (SRS) by a user device (UE) while it is disconnected from a communication network, wherein the instructions include code for performing the method according to any one of claims 1 to 12.

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