Wireless communication method and device that support data transmission on unlicensed spectrum

Inventors: Xiaobo Zhang (Shanghai, CN); Lin Yang (Shanghai, CN)

Assignee: SHANGHAI LANGBO COMMUNICATION TECHNOLOGY COMPANY LIMITED

H04L5/0007 H04L5/003 H04W72/0446 H04W72/0453

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Quick Facts

Patent No.: US 12,047,307
App. No.: 17/986,916
Granted: Jul 23, 2024
Kind: B2

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Abstract

A method and a device in a User Equipment (UE) and a base station for wireless communications are disclosed by the present disclosure. A first node receives T first-type radio signals; performs T access detections respectively on T sub-bands and transmits T second-type radio signals respectively in T time-frequency resource blocks; and performs Q energy detection(s) respectively in Q time sub-pool(s) on a first sub-band, through which Q detection value(s) is(are) obtained. The T sub-bands each comprise at least one same frequency point, or the T sub-bands belong to a same carrier; at least one of the T sub-bands is different from the first sub-band; the selection of the reference time-frequency resource block is related to at least one between the first sub-band and the reference sub-band; the first node is a base station, or the first node is a UE.

Claims (52)

1. A method in a first node for wireless communications, comprising:

receiving T first-type radio signals, any first-type radio signal of the T first-type radio signals comprises control information, T being a positive integer greater than 1; and

performing T access detections respectively on T sub-bands, and transmitting T second-type radio signals respectively in T time-frequency resource blocks, wherein the T access detections are respectively used for determining whether the T sub-bands are idle, the T second-type radio signals are respectively transmitted in the T sub-bands, and any of the T time-frequency resource blocks is earlier than Q time sub-pool(s) in time domain;

operating first information;

performing Q energy detection(s) respectively in the Q time sub-pool(s) on a first sub-band, through which Q detection value(s) is(are) obtained, the Q energy detection(s) is(are) used for determining whether the first sub-band is idle, Q being a positive integer; and

transmitting a third-type radio signal in the first sub-band; wherein:

the T sub-bands comprise at least one same frequency point, or the T sub-bands belong to a same carrier; at least one sub-band of the T sub-bands is different from the first sub-band;

the T sub-bands and the first sub-band belong to a same carrier, and at least one of the T sub-bands is non-orthogonal with the first sub-band;

the T first-type radio signals are respectively associated with the T second-type radio signals;

a reference first-type radio signal is one of the T first-type radio signals, the Q is related only to the reference first-type radio signal of the T first-type radio signals;

the T access detections are respectively used for determining transmissions of the T second-type radio signals;

a reference sub-band is one of the T sub-bands corresponding to the reference first-type radio signal, and a reference time-frequency resource block is one of the T time-frequency resource blocks corresponding to the reference first-type radio signal;

the reference time-frequency resource block being one of the T time-frequency resource blocks that corresponds to the reference first-type radio signal means that a reference second-type radio signal is one of the T second-type radio signals associated with the reference first-type radio signal, and the reference time-frequency resource block is a time-frequency resource block used for transmitting the reference second-type radio signal out of the T time-frequency resource blocks;

selection of the reference time-frequency resource block is related to at least one of the first sub-band or the reference sub-band;

the first information comprises scheduling information of the third-type radio signal;

a start time of time-domain resources occupied by the third-type radio signal is no earlier than an end time of the Q time sub-pool(s); and

the operating is transmitting, the first node is a base station, or, the operating is receiving, the first node is a User Equipment (UE).

2. The method according to claim 1 , wherein the first node is a base station, any of the T first-type radio signals comprises Uplink control information (UCI), the T second-type radio signals are respectively transmitted on T Physical Downlink Shared CHannels (PDSCHs), and the Q energy detection(s) is(are) respectively energy detection(s) in a downlink access detection.

3. The method according to claim 1 , wherein the first node is a UE, any of the T first-type radio signals comprises Downlink Control Information (DCI), the T second-type radio signals are respectively transmitted on T PUSCHs, and the Q energy detection(s) is(are) energy detection(s) in an uplink access detection.

4. The method according to claim 1 , wherein a bandwidth of the reference sub-band is equal to a bandwidth of a carrier to which the reference sub-band belongs.

5. The method according to claim 1 , wherein each oft time-frequency resource block(s) out of the T time-frequency resource blocks comprises the first sub-band in frequency domain, t being a positive integer no greater than the T, the reference time-frequency resource block is one of the t time-frequency resource block(s).

6. The method according to claim 5 , wherein the t is greater than 1, and the reference time-frequency resource block being one of the t time-frequency resource blocks that is closest to a start time of the Q time sub-pool(s) in time domain.

7. The method according to claim 1 , wherein the T first-type radio signals respectively indicate whether the T second-type radio signals are correctly received; a reference second-type radio signal is one of the T second-type radio signals associated with the reference first-type radio signal, and the reference second-type radio signal comprises W sub-signal(s), W being a positive integer; whether the W sub-signal(s) is(are) correctly received is used for determining the Q.

8. The method according to claim 7 , wherein S fourth-type radio signal(s) indicates(indicate) whether S fifth-type radio signal(s) is(are) correctly received respectively, time-frequency resources respectively occupied by the S fifth-type radio signals belong to the reference time-frequency resource block, and the S fifth-type radio signal(s) comprises(comprise) W1 sub-signal(s), W1 being a positive integer; whether the W sub-signal(s) and the W1 sub-signal(s) are correctly received is used for determining the Q.

9. The method according to claim 1 , wherein each of Q1 detection value(s) out of the Q detection value(s) is lower than a first threshold, K being a positive integer, and the Q1 being a positive integer no greater than the Q; the reference first-type radio signal is used for determining K candidate integer(s), Q1 being one of the K candidate integer(s).

10. The method according to claim 9 , wherein the K candidate integers are 0, 1, 2. . . , and K−1, and the first node randomly selects a value of the Q1 from the K candidate integers.

11. A device in a first node for wireless communications, comprising:

a first transceiver, receiving T first-type radio signals, any first-type radio signal of the T first-type radio signals comprises control information, T being a positive integer greater than 1; performing T access detections respectively on T sub-bands, and transmitting T second-type radio signals respectively in T time-frequency resource blocks, wherein the T access detections are respectively used for determining whether the T sub-bands are idle, the T second-type radio signals are respectively transmitted in the T sub-bands, and any of the T time-frequency resource blocks is earlier than Q time sub-pool(s) in time domain; and operating first information;

a first receiver, performing Q energy detection(s) respectively in the Q time sub-pool(s) on a first sub-band, through which Q detection value(s) is(are) obtained, the Q energy detection(s) is(are) used for determining whether the first sub-band is idle, Q being a positive integer; and

a first transmitter, transmitting a third-type radio signal in the first sub-band; wherein:

the T sub-bands comprise at least one same frequency point, or the T sub-bands belong to a same carrier;

at least one sub-band of the T sub-bands is different from the first sub-band;