阅读说明：本技术 波束失败恢复方法、装置和通信系统 (Beam failure recovery method, device and communication system ) 是由 陈哲 宋磊 杨现俊 张磊 王昕� 于 2019-03-28 设计创作，主要内容包括：本申请提供一种波束失败恢复方法、装置和通信系统,该装置包括：接收单元,在终端设备接收到与波束失败恢复相关的响应(BFR response)的一段时间之后,直至激活或重配置信令之前,所述接收单元在所述终端设备的第一小区中根据与选择出的参考信号(q-new)或高层指示的参考信号(q-new)相同的天线准共址(QCL)参数监听和/或接收下行信号。根据本申请,终端设备能有足够的时间可靠地进行波束方向的切换,从而提升系统性能。(The application provides a method, a device and a communication system for recovering beam failure, wherein the device comprises: a receiving unit which monitors and/or receives a downlink signal according to the same antenna quasi-co-location (QCL) parameter as the selected reference signal (q _ new) or the reference signal (q _ new) indicated by a higher layer in a first cell of a terminal device after a period of time when the terminal device receives a response (BFR response) related to beam failure recovery until activation or reconfiguration signaling. According to the method and the device, the terminal equipment can have enough time to reliably switch the beam direction, so that the system performance is improved.)

A beam failure recovery device is arranged in a terminal device, and comprises:

a receiving unit, which monitors and/or receives a downlink signal according to a Quasi-co-located (QCL) parameter of the same antenna as a selected reference signal (q _ new) or a reference signal (q _ new) indicated by a higher layer in a first cell of a terminal device after a period of time when the terminal device receives a response (BFR response) related to beam failure recovery until activation or reconfiguration signaling.

The apparatus of claim 1, wherein,

the downlink signal comprises at least one of the following signals:

a Physical Downlink Control Channel (PDCCH), a physical downlink data channel (PDSCH), a channel state information reference signal (CSI-RS), and a Synchronization Signal Block (SSB).

The apparatus of claim 2, wherein,

the receiving unit monitors the Physical Downlink Control Channel (PDCCH) in the first cell, in case there is an opportunity to monitor the Physical Downlink Control Channel (PDCCH) in the first cell.

The apparatus of claim 2, wherein,

the physical downlink data channel (PDSCH) includes:

a physical downlink data channel (PDSCH) in the first cell; or

A physical downlink data channel (PDSCH) scheduled by the monitored Physical Downlink Control Channel (PDCCH) in case there is an opportunity to monitor the Physical Downlink Control Channel (PDCCH) in the first cell; or

A physical downlink data channel (PDSCH) scheduled by a Physical Downlink Control Channel (PDCCH) receiving the response (BFR response) related to beam failure recovery.

The apparatus of claim 1, wherein,

the response (BFR response) related to beam failure recovery has a downlink control signaling (DCI) format scrambled by a cell radio network temporary identity (C-RNTI) or a Cyclic Redundancy Check (Cyclic Redundancy Check) modulated and coded policy cell radio network temporary identity (MCS-C-RNTI).

The apparatus of claim 1, wherein,

the response (BFR response) related to beam failure recovery is detected in a search space (search space) of a random access response (BFR RAR) for beam failure recovery.

The apparatus of claim 6, wherein,

the response (BFR response) associated with beam failure recovery is a first Physical Downlink Control Channel (PDCCH) in the search space.

The apparatus of claim 1, wherein,

the period of time is represented as:

an absolute time; or

The number of slots or symbols associated with the subcarrier spacing.

The apparatus of claim 8, wherein,

the subcarrier spacing includes:

a subcarrier spacing of the first cell; alternatively, the first and second electrodes may be,

receiving a subcarrier spacing of a cell in which the response (BFR response) related to the beam failure recovery is located.

The apparatus of claim 1, wherein,

the starting point (T1) of the period of time is:

a slot (slot) in which the terminal device receives a response (BFR response) related to beam failure recovery; or

The last symbol (symbol) of the response (BFR response) associated with the beam failure recovery; or

The terminal device receives the last symbol (symbol) in the control resource set (CORESET) of the response (BFR response) related to the beam failure recovery.

The apparatus of claim 1, wherein,

the end of the period of time (T2) is:

a time slot for receiving the downlink signal; or

A first symbol (the first symbol) in a control resource set (CORESET) or a search space (search space) for listening to the downlink signal; or

The first symbol (the first symbol) of the downlink signal.

The apparatus of claim 1, wherein the downlink signal comprises a Physical Downlink Control Channel (PDCCH), and a control resource set (CORESET) or a search space (search space) for monitoring the downlink signal satisfies at least one of the following conditions:

all control resource sets (CORESET) or all search spaces (search space) corresponding to the Physical Downlink Control Channel (PDCCH) on an active bandwidth part (BWP) in the first cell;

a control resource set (CORESET) or a search space (search space) corresponding to the Physical Downlink Control Channel (PDCCH) is a default control resource set (CORESET) or a search space (search space);

the control resource set (CORESET) or the search space (search space) corresponding to the Physical Downlink Control Channel (PDCCH) is the control resource set (CORESET) or the search space (search space) indicated by Radio Resource Control (RRC) signaling.

The apparatus of claim 1, wherein,

the activation or reconfiguration signaling comprises:

activation or reconfiguration signaling for the first cell; or

Activation or reconfiguration signaling for a second cell associated with the first cell; or

Signaling activation or reconfiguration of a primary cell for the terminal device.

The apparatus of claim 1, wherein,

the activation or reconfiguration signaling comprises:

MAC-CE signaling for activating TCI state of control resource set (CORESET) corresponding to the downlink signal; or

The MAC-CE signaling is used for activating the TCI state set corresponding to the downlink signal; or

Radio Resource Control (RRC) signaling for reconfiguring a TCI state set of a control resource set (CORESET) corresponding to the downlink signal; or

And Radio Resource Control (RRC) signaling for reconfiguring the TCI state set corresponding to the downlink signal.

The apparatus of claim 1, wherein,

the first cell includes:

the terminal device reports the cell information to the network device; or

A cell associated with a cell corresponding to cell information reported by the terminal equipment to the network equipment; or

A cell indicated by a higher layer of the terminal device; or

A cell associated with a cell indicated by a higher layer of the terminal device; or

A cell associated with a cell receiving a response (BFR response) associated with the beam failure recovery.

The apparatus of claim 1, wherein,

the reference signal indicated by the higher layer is the reference signal (q _ new) indicated last by the higher layer.

A beam failure recovery device is applied to network equipment and comprises:

the first indication unit is used for sending signaling for indicating the joint beam failure recovery between more than two cells of the terminal equipment to the terminal equipment.

A beam failure recovery device is applied to network equipment and comprises:

a second indicating unit, configured to send, to the terminal device, a signaling indicating a cell, and/or a bandwidth portion, and/or a control resource set (CORESET) for monitoring and/or receiving a downlink signal.

The apparatus of claim 18, wherein,

the second signaling contains a mapping relationship between cells, and/or BWPs, and/or control resource sets (CORESET) or search spaces.

The apparatus of claim 17, wherein the apparatus further comprises:

a third indication unit that transmits a response (BFR response) related to beam failure recovery to the terminal device.