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srs carrier based handover on unlicensed band

A technology of carrier and group carrier, which is applied in the field of handover based on SRS carrier in the unlicensed frequency band, and can solve the problem that the availability of SRS channel access cannot be guaranteed.

Active Publication Date: 2021-11-19
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unlike licensed LTE, there is no guarantee of channel access availability for SRS transmitted on unlicensed carriers

Method used

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  • srs carrier based handover on unlicensed band
  • srs carrier based handover on unlicensed band
  • srs carrier based handover on unlicensed band

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0107] First embodiment: a method of operation of a UE (14) in a wireless system (10) comprising: performing (104, 202, 304) uplink LBT on one or more candidate carriers for switching carrier SRS transmission, and Performing (106, 206, 308) switching on at least one of the one or more candidate carriers determined to be available as a result of performing (104, 202, 304) uplink LBT on the one or more candidate carriers Carrier SRS transmission.

no. 2 example

[0108] Second embodiment: The first embodiment, wherein the one or more candidate carriers are carriers other than the carrier configured for the UE (14) and on which the UE (14) is scheduled to transmit.

no. 3 example

[0109] Third embodiment: the first or second embodiment, wherein performing (104, 202, 304) uplink LBT on one or more candidate carriers for switching carrier SRS transmission comprises: performing (104) on the candidate carriers ) an uplink LBT that results in a candidate carrier being available; and performing (106, 206, 308) switching carrier SRS transmissions on at least one candidate carrier includes: in response to the uplink LBT resulting in a candidate carrier Available, perform (106) switch carrier SRS transmission on the candidate carrier.

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Abstract

Systems and methods related to switched carrier sounding reference signal (SRS) transmission in unlicensed spectrum are disclosed. In some embodiments, a method of operation of a user equipment device (UE) in a wireless system comprises: performing uplink listen before talk (LBT) on one or more candidate carriers for switching carrier SRS transmission, and The switched carrier SRS transmission is performed on at least one of the one or more candidate carriers determined to be available as a result of performing uplink LBT on the one or more candidate carriers. In some embodiments, the one or more candidate carriers are carriers other than the carrier configured for the UE and on which the UE is scheduled to transmit.

Description

[0001] related application [0002] This application claims the benefit of Provisional Patent Application Serial No. 62 / 364,454, filed July 20, 2016, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] Sounding Reference Signal (SRS) in Unlicensed Spectrum, SRS Carrier Based Handover, Long Term Evolution (LTE) Unlicensed Carrier, License Assisted Access (LAA), MulteFire, Fifth Generation (5G) New Radio (NR). Background technique [0004] Ongoing Standalone Long Term Evolution (LTE) in the Unlicensed Spectrum Forum (MulteFire) and 3rd Generation Partnership Project (3GPP) Release (Rel) 14 work item on Uplink Licensed Assisted Access (LAA) allows LTE user equipment The device (UE) transmits on the uplink in the unlicensed 5 gigahertz (GHz) or licensed shared 3.5 GHz wireless spectrum. These uplink transmissions typically require listening before talking (LBT) before accessing the channel. There is also an ongoing 3GPP Rel-14 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00
CPCH04L5/001H04L5/005H04L5/0051H04W72/23H04L25/0226H04L27/2607H04W16/14H04W72/0453H04W74/0808
Inventor A·姆克基
Owner TELEFON AB LM ERICSSON (PUBL)