CROSS REFERENCE TO RELATED APPLICATIONS

This application claims the priority benefit of Chinese Patent Application No. 201910788289.0, filed on Aug. 26, 2019. The full disclosure of which is incorporated herein by reference.

BACKGROUND

Technical Field

The present disclosure relates to a transmission method and device in a wireless communication system, and in particular to a transmission method and device for radio signals in a wireless communication system supporting a cellular network.

Related Art

In 5G New Radio (NR), Massive Multi-Input Multi-Output (MIMO) is a key technology. In the massive MIMO, multiple antennas based on beamforming to form a relatively narrow beam which points to a particular direction to improve the quality of communication. In 5G NR, in order to ensure a rapid recovery when a beam fails, a beam failure recovery mechanism has been adopted, that is, User Equipment (UE) measures a serving beam in communication process, when the serving beam is found to be poor, the beam failure recovery mechanism is activated, so that base station replaces the serving beam. The Beam failure recovery mechanism comprises a beam failure detection, a new candidate beam identification, a beam failure recovery request transmission and monitoring response for beam failure recovery request.

In 5G NR system, the base station and/or terminal equipment will be equipped with multiple antenna panels. The beam failure recovery mechanism under multi-base-station and/or multi-antenna-panel needs to be further considered.

SUMMARY

In 5G NR system, for multi-base-station and/or multi-antenna-panel, it is a key problem to design an appropriate beam failure recovery mechanism considering whether part or all of base stations or multi-antenna panels fail.

In view of the above problem, the present disclosure provides a solution. It should be noted that the embodiments of a User Equipment (UE) in the present disclosure and the characteristics of the embodiments may be applied to a base station if no conflict is incurred, and vice versa. The embodiments of the present disclosure and the characteristics of the embodiments may be mutually combined if no conflict is incurred.

The present disclosure provides a method in a first node for wireless communication, comprising:

receiving M1 first-type reference signals, measurements for the M1 first-type reference signals being used for generating first radio-link quality, M1 being a positive integer greater than 1;

receiving M2 first-type reference signals, measurements for the M2 first-type reference signals being used for generating second radio-link quality, M2 being a positive integer greater than 1; and

transmitting a first radio signal on a target radio resource;

wherein the first radio-link quality and the second radio-link quality correspond to a first threshold and a second threshold respectively, at least one of the first radio-link quality and the second radio-link quality is worse than its corresponding threshold, the first threshold and the second threshold both being real numbers; the first radio-link quality and the second radio-link quality are used for determining the target radio resource and the first radio signal; the target radio resource is one of a first radio resource, a second radio resource and a third radio resource; the first radio resource and the second radio resource correspond to a first index and a second index respectively, the first index and the second index being two different non-negative integers; the first index is used for determining the M1 first-type reference signals, and the second index is used for determining the M2 first-type reference signals.

In one embodiment, a problem needed to be solved in the present disclosure is: the beam failure recovery mechanism when multi-base-station or base station is equipped with multi-antenna-panel is a key issue that needs to be studied.

In one embodiment, a problem needed to be solved in the present disclosure is: in the case of multi-base-station or base station equipped with multi-antenna-panel, how to select radio resources for transmitting a beam failure recovery request is a key issue that needs to be studied.

In one embodiment, a problem needed to be solved in the present disclosure is: the beam failure recovery mechanism when UE is equipped with multi-antenna-panel is a key issue that needs to be studied.

In one embodiment, a problem needed to be solved in the present disclosure is: in the case of UE equipped with multi-antenna-panel, how to select radio resources for transmitting a beam failure recovery request is a key issue that needs to be studied.

In one embodiment, the essence of the above method is that a first index and a second index correspond to a first base station and a second base station respectively, M1 first-type reference signals and M2 first-type reference signals are used for a beam failure detection for the first base station and a beam failure detection for the second base station, and at least one of the two base stations transmits a beam failure; a first radio signal is used for a beam failure recovery request, a target receiver transmitted on a first radio resource is the first base station, a target receiver transmitted on a second radio resource is the second base station, and radio resources used for transmitting the beam failure recovery request are determined according to a beam failure occurring on which base station. The advantage of adopting the above method is that when determining radio resources for transmitting the beam failure recovery request, a beam failure occurring on which base station is considered and a rapid beam recovery is realized for the base station.

In one embodiment, the essence of the above method is that a first index and a second index respectively correspond to two antenna panels (two antenna panels configured in base station or two antenna panels configured in UE), M1 first-type reference signals and M2 first-type reference signals are respectively used for a beam failure detection for a first antenna panel and a beam failure detection for a second antenna panel, and a transmission on at least one of the two panels transmits a beam failure; a first radio signal is used for a beam failure recovery request, a target receiver transmitted on a first radio resource (two antenna panels are configured in base station) or a target transmitter (two antenna panels are configured in UE) is a first antenna panel, a target receiver transmitted on a second radio resource (two antenna panels are configured in base station) or a target transmitter (two antenna panels are configured in UE) is a second antenna panel, radio resources for transmitting the beam failure recovery request are determined according to a beam failure occurring on which base station. The advantage of adopting the above method is that when determining radio resources for transmitting a beam failure recovery request, a beam failure occurring on which antenna panel is considered and a rapid beam recovery is realized for the antenna panel.

According to one aspect of the present disclosure, the above method is characterized in that the first radio resource and the second radio resource are both reserved for a first-type physical-layer channel, and the third radio resource is reserved for a second-type physical-layer channel, the first-type physical-layer channel and the second-type physical-layer channel being different.

In one embodiment, the essence of the above method is that the first-type physical-layer channel is a PUCCH, and the second-type physical-layer channel is a PRACH.

According to one aspect of the present disclosure, the above method is characterized in that when the first radio-link quality is worse than the first threshold and the second radio-link quality is not worse than the second threshold, the target radio resource is the second radio resource; when the first radio-link quality is not worse than the first threshold and the second radio-link quality is worse than the second threshold, the target radio resource is the first radio resource; when the first radio-link quality is worse than the first threshold and the second radio-link quality is worse than the second threshold, the target radio resource is the third radio resource.

In one embodiment, the essence of the above method is that when a beam failure occurs in only one of two base stations or two antenna panels, a beam failure recovery request for one base station or one antenna panel that has the beam failure can be transmitted on an radio resource (a first radio resource or a second radio resource) of the other base station or antenna panel that does not have the beam failure; when two base stations both have beam failures, a beam failure recovery request for the two base stations can be transmitted on a third radio resource.

According to one aspect of the present disclosure, the above method is characterized in comprising:

receiving third information, the third information being used for indicating N1 second-type reference signals; and

receiving fourth information, the fourth information being used for indicating N2 second-type reference signals;

when the target radio resource is the second radio resource, receiving the N1 second-type reference signals, measurements for the N1 second-type reference signals being respectively used for generating N1 second-type measurement values;

when the target radio resource is the first radio resource, receiving the N2 second-type reference signals, measurements for the N2 second-type reference signals being respectively used for generating N2 second-type measurement values.

wherein the first index is used for determining the N1 second-type reference signals, and the second index is used for determining the N2 second-type reference signals; a target reference signal is used for generating the first radio signal; when the target radio resource is the second radio resource, the target reference signal is one of the N1 second-type reference signals; when the target radio resource is the first radio resource, the target reference signal is one of the N2 second-type reference signals; N1 is a positive integer greater than 1, and N2 is a positive integer greater than 1.

In one embodiment, the essence of the above method is that N1 second-type reference signals and N2 second-type reference signals are respectively candidate beams for two base stations or two antenna panels, and a beam failure recovery request carries a new beam; a first radio resource corresponding to a first base station and a first antenna panel are used for transmitting a new beam of a second base station or a second antenna panel, and a second radio resource corresponding to a second base station or a second antenna panel are used for transmitting a new beam of a first base station or a first antenna panel.

According to one aspect of the present disclosure, the above method is characterized in comprising:

transmitting a first report; and

receiving first indication information;

wherein the first report is used for indicating P1 second-type reference signal(s); the first indication information is used for indicating the target reference signal, the target reference signal being one of the P1 second-type reference signal(s), P1 being a positive integer; when the target radio resource is the second radio resource, size relationships respectively between the N1 second-type measured values and N1 first-type thresholds are used for determining the P1 second-type reference signal(s) out of the N1 second-type reference signals; when the target radio resource is the first radio resource, size relationships respectively between the N2 second-type measured values and N2 first-type thresholds are used for determining the P1 second-type reference signal(s) out of the N2 second-type reference signals.

In one embodiment, the essence of the above method is that P1 second-type reference signal(s) is(are) P1 candidate beam(s) recommended by a physical layer to a higher layer, and a target reference signal is a new beam determined by a higher layer.

According to one aspect of the present disclosure, the above method is characterized in comprising:

receiving second information;

wherein the second information is used for indicating the first radio resource, the second radio resource and the third radio resource.

According to one aspect of the present disclosure, the above method is characterized in comprising:

receiving first information;

wherein the first information is used for determining the first index and the second index.

The present disclosure provides a method in a second node for wireless communication, comprising:

transmitting M1 first-type reference signals, measurements for the M1 first-type reference signals being used for generating first radio-link quality, M1 being a positive integer greater than 1;

transmitting M2 first-type reference signals, measurements for the M2 first-type reference signals being used for generating second radio-link quality, M2 being a positive integer greater than 1; and

receiving a first radio signal on a target radio resource;

wherein the first radio-link quality and the second radio-link quality correspond to a first threshold and a second threshold respectively, at least one of the first radio-link quality and the second radio-link quality is worse than its corresponding threshold, the first threshold and the second threshold both being real numbers; the first radio-link quality and the second radio-link quality are used for determining the target radio resource and the first radio signal; the target radio resource is one of a first radio resource, a second radio resource and a third radio resource; the first radio resource and the second radio resource correspond to a first index and a second index respectively, the first index and the second index being two different non-negative integers; the first index is used for determining the M1 first-type reference signals, and the second index is used for determining the M2 first-type reference signals.

According to one aspect of the present disclosure, the above method is characterized in that the first radio resource and the second radio resource are both reserved for a first-type physical-layer channel, and the third radio resource is reserved for a second-type physical-layer channel, the first-type physical-layer channel and the second-type physical-layer channel being different.

According to one aspect of the present disclosure, the above method is characterized in that when the first radio-link quality is worse than the first threshold and the second radio-link quality is not worse than the second threshold, the target radio resource is the second radio resource; when the first radio-link quality is not worse than the first threshold and the second radio-link quality is worse than the second threshold, the target radio resource is the first radio resource; when the first radio-link quality is worse than the first threshold and the second radio-link quality is worse than the second threshold, the target radio resource is the third radio resource.

According to one aspect of the present disclosure, the above method is characterized in comprising:

transmitting third information, the third information being used for indicating N1 second-type reference signals;

transmitting fourth information, the fourth information being used for indicating N2 second-type reference signals;

transmitting the N1 second-type reference signals; and

transmitting the N2 second-type reference signals;

wherein the first index is used for determining the N1 second-type reference signals, and the second index is used for determining the N2 second-type reference signals; a target reference signal is used for generating the first radio signal; when the target radio resource is the second radio resource, the target reference signal is one of the N1 second-type reference signals; when the target radio resource is the first radio resource, the target reference signal is one of the N2 second-type reference signals; N1 is a positive integer greater than 1, and N2 is a positive integer greater than 1.

According to one aspect of the present disclosure, the above method is characterized in comprising:

transmitting second information;

wherein the second information is used for indicating the first radio resource, the second radio resource and the third radio resource.

According to one aspect of the present disclosure, the above method is characterized in comprising:

transmitting first information;

wherein the first information is used for determining the first index and the second index.

The present disclosure provides a first node for wireless communication, comprising:

a first receiver, receiving M1 first-type reference signals, measurements for the M1 first-type reference signals being used for generating first radio-link quality, M1 being a positive integer greater than 1; receiving M2 first-type reference signals, measurements for the M2 first-type reference signals being used for generating second radio-link quality, M2 being a positive integer greater than 1; and

a first transmitter, transmitting a first radio signal on a target radio resource;

wherein the first radio-link quality and the second radio-link quality correspond to a first threshold and a second threshold respectively, at least one of the first radio-link quality and the second radio-link quality is worse than its corresponding threshold, the first threshold and the second threshold both being real numbers; the first radio-link quality and the second radio-link quality are used for determining the target radio resource and the first radio signal; the target radio resource is one of a first radio resource, a second radio resource and a third radio resource; the first radio resource and the second radio resource correspond to a first index and a second index respectively, the first index and the second index being two different non-negative integers; the first index is used for determining the M1 first-type reference signals, and the second index is used for determining the M2 first-type reference signals.

The present disclosure provides a second node for wireless communication, comprising:

a second transmitter, transmitting M1 first-type reference signals, measurements for the M1 first-type reference signals being used for generating first radio-link quality, M1 being a positive integer greater than 1; transmitting M2 first-type reference signals, measurements for the M2 first-type reference signals being used for generating second radio-link quality, M2 being a positive integer greater than 1; and

a second receiver, receiving a first radio signal on a target radio resource;

wherein the first radio-link quality and the second radio-link quality correspond to a first threshold and a second threshold respectively, at least one of the first radio-link quality and the second radio-link quality is worse than its corresponding threshold, the first threshold and the second threshold both being real numbers; the first radio-link quality and the second radio-link quality are used for determining the target radio resource and the first radio signal; the target radio resource is one of a first radio resource, a second radio resource and a third radio resource; the first radio resource and the second radio resource correspond to a first index and a second index respectively, the first index and the second index being two different non-negative integers; the first index is used for determining the M1 first-type reference signals, and the second index is used for determining the M2 first-type reference signals.

In one embodiment, the method in the present disclosure is advantageous in the following aspects:

The present disclosure proposes a beam failure recovery mechanism in the case of multi-base-station and multi-antenna-panel.

The present disclosure proposes a scheme of how to select radio resources for transmitting a beam failure recovery request in the case of multi-base-station and multi-antenna-panel.

In the method proposed in the present disclosure, when determining radio resources for transmitting a beam failure recovery request, which base station or antenna panel has a beam failure is considered, and a fast beam recovery is realized for the base station or antenna panel that has a beam failure.

