阅读说明：本技术 Bwp切换方法和终端设备 (BWP switching method and terminal device ) 是由 徐伟杰 卢前溪 于 2019-07-05 设计创作，主要内容包括：本申请实施例提供了一种BWP切换方法和终端设备,终端设备可以基于下行参考信号的测量,实现自主的下行BWP和/或上行BWP切换,从而解决卫星通信中由于卫星波束的快速切换导致的BWP快频繁切换对卫星的通信性能的影响。该BWP切换方法包括：终端设备测量多个下行BWP所对应的多个下行参考信号；该终端设备根据该多个下行BWP所对应的多个下行参考信号的测量结果,确定是否从第一下行BWP切换至第二下行BWP,其中,该第一下行BWP为激活的BWP,该第一下行BWP和该第二下行BWP属于该多个下行BWP。(The embodiment of the application provides a BWP switching method and a terminal device, wherein the terminal device can realize autonomous downlink BWP and/or uplink BWP switching based on measurement of a downlink reference signal, so that the influence of fast and frequent switching of BWP on communication performance of a satellite due to fast switching of satellite beams in satellite communication is solved. The BWP switching method includes: the terminal equipment measures a plurality of downlink reference signals corresponding to a plurality of downlink BWPs; the terminal device determines whether to switch from a first downlink BWP to a second downlink BWP according to measurement results of a plurality of downlink reference signals corresponding to the plurality of downlink BWPs, where the first downlink BWP is an active BWP, and the first downlink BWP and the second downlink BWP belong to the plurality of downlink BWPs.)

A BWP switching method, comprising:

the terminal equipment measures a plurality of downlink reference signals corresponding to a plurality of downlink bandwidth parts BWP;

the terminal device determines whether to switch from a first downlink BWP to a second downlink BWP according to measurement results of a plurality of downlink reference signals corresponding to the plurality of downlink BWPs, where the first downlink BWP is an active BWP, and the first downlink BWP and the second downlink BWP belong to the plurality of downlink BWPs.

The method of claim 1, wherein the measurement results comprise at least one of:

reference signal received power RSRP corresponding to BWP, reference signal received quality RSRQ corresponding to BWP, reference signal-to-carrier interference-plus-noise ratio RS-SINR corresponding to BWP, and channel quality indicator CQI corresponding to BWP.

The method according to claim 1 or 2, wherein the determining, by the terminal device, whether to switch from the first downlink BWP to the second downlink BWP according to the measurement results of the downlink reference signals corresponding to the downlink BWPs comprises:

if the measurement result of the downlink reference signal corresponding to the second downlink BWP is greater than the measurement result of the downlink reference signal corresponding to the first downlink BWP, the terminal device switches from the first downlink BWP to the second downlink BWP.

The method according to claim 1 or 2, wherein the determining, by the terminal device, whether to switch from the first downlink BWP to the second downlink BWP according to the measurement results of the downlink reference signals corresponding to the downlink BWPs comprises:

if the difference between the measurement result of the downlink reference signal corresponding to the second downlink BWP and the measurement result of the downlink reference signal corresponding to the first downlink BWP is greater than a first threshold, the terminal device switches from the first downlink BWP to the second downlink BWP.

The method of claim 4, wherein the first threshold is preset, or wherein the first threshold is preconfigured by a network device through signaling.

The method according to any of claims 3 to 5, wherein the measurement result of the downlink reference signal corresponding to the second downlink BWP is largest among the measurement results of the plurality of downlink reference signals corresponding to the plurality of downlink BWPs.

The method according to any of claims 1 to 6, wherein if the terminal device determines to switch from the first downlink BWP to the second downlink BWP, the method further comprises:

before the terminal device switches from the first downlink BWP to the second downlink BWP, the terminal device sends a first uplink signal to indicate information of the second downlink BWP and/or information of an uplink BWP corresponding to the second downlink BWP.

The method according to claim 7, wherein the first uplink signal comprises index information of the second downlink BWP and/or index information of an uplink BWP corresponding to the second downlink BWP.

The method of claim 7, wherein the terminal device transmits a first uplink signal, and wherein the method comprises:

the terminal device sends the first uplink signal on an uplink BWP corresponding to the first downlink BWP according to a first corresponding relationship, where the first uplink signal corresponds to index information of the second downlink BWP, the first corresponding relationship is a corresponding relationship between a plurality of uplink information and indexes of the plurality of downlink BWPs, and the plurality of uplink information includes the first uplink signal.

The method of claim 9, wherein the first corresponding relationship is preset, or wherein the first corresponding relationship is pre-configured by a network device through signaling.

The method according to any of claims 7-10, wherein the first uplink signal is one of:

a random access preamble, a dedicated scheduling request SR, a dedicated sounding reference signal SRs, a medium access control element MAC CE signaling, or a radio resource control RRC message.

The method according to any one of claims 7 to 11, further comprising:

and the terminal equipment receives the configuration information of the first uplink signal.

The method of claim 12, wherein the receiving, by the terminal device, the configuration information of the first uplink signal comprises:

and the terminal device receives the configuration information of the first uplink signal when the measurement result of the downlink reference signal corresponding to the first downlink BWP is smaller than a second threshold.

The method according to any of claims 1 to 6, wherein if the terminal device determines to switch from the first downlink BWP to the second downlink BWP, the method further comprises:

after the terminal device switches from the first downlink BWP to the second downlink BWP, the terminal device sends a second uplink signal to indicate information of the second downlink BWP and/or information of an uplink BWP corresponding to the second downlink BWP.

The method according to claim 14, wherein the second uplink signal comprises index information of the second downlink BWP and/or index information of an uplink BWP corresponding to the second downlink BWP.

The method of claim 14, wherein the terminal device transmits a second uplink signal, and wherein the method comprises:

and the terminal equipment sends the second uplink signal on the uplink BWP corresponding to the second downlink BWP.

The method of claim 14, wherein the terminal device transmits a second uplink signal, and wherein the method comprises:

the terminal device sends the second uplink signal on the uplink BWP corresponding to the second downlink BWP according to a second correspondence, where the second uplink signal corresponds to the index information of the second downlink BWP, the second correspondence is a correspondence between a plurality of uplink information and the indexes of the plurality of downlink BWPs, and the plurality of uplink information includes the second uplink signal.

The method of claim 17, wherein the second mapping relationship is preset, or wherein the second mapping relationship is pre-configured by a network device through signaling.

The method according to any of claims 14-18, characterized in that the second uplink signal is one of the following:

a random access preamble, a dedicated SR, a dedicated SRs, MAC CE signaling, or an RRC message.

The method according to any one of claims 14 to 19, further comprising:

and the terminal equipment receives the configuration information of the second uplink signal.

The method of claim 20, wherein the receiving, by the terminal device, the configuration information of the second uplink signal comprises:

and receiving, by the terminal device, configuration information of the second uplink signal when a measurement result of the downlink reference signal corresponding to the first downlink BWP is smaller than a third threshold.

The method according to any of claims 14 to 21, wherein the start time of the terminal device switching from the first downlink BWP to the second downlink BWP is separated from the start time of transmitting the second uplink signal by a first duration.

The method of claim 22, wherein the first duration is preset, or wherein the first duration is preconfigured by a network device through signaling.

The method according to any one of claims 1 to 23, wherein a plurality of downlink reference signals corresponding to the plurality of downlink BWPs are preset, or the plurality of downlink reference signals corresponding to the plurality of downlink BWPs are configured by the network device through signaling in advance.

The method according to any of claims 1 to 24, wherein the measuring, by the terminal device, a plurality of downlink reference signals corresponding to a plurality of downlink BWPs comprises:

the terminal device periodically measures a plurality of downlink reference signals corresponding to the plurality of downlink BWPs.

The method according to claim 25, wherein a measurement period of the plurality of downlink reference signals corresponding to the plurality of downlink BWPs is preset, or wherein the measurement period of the plurality of downlink reference signals corresponding to the plurality of downlink BWPs is preconfigured by the network device through signaling.

The method of any one of claims 1 to 26, further comprising:

the terminal device determines whether to perform uplink BWP handover.

The method of claim 27, wherein the determining, by the end device, whether to perform the uplink BWP handover comprises:

if the terminal device determines to switch from the first downlink BWP to the second downlink BWP, the terminal device determines to switch from the uplink BWP corresponding to the first downlink BWP to the uplink BWP corresponding to the second downlink BWP according to a third corresponding relationship, where the third corresponding relationship is a corresponding relationship between the plurality of downlink BWPs and the plurality of uplink BWPs.

The method of claim 28, wherein the third mapping is predetermined, or wherein the third mapping is preconfigured by a network device through signaling.

The method according to any of claims 1 to 29, wherein the plurality of downlink reference signals corresponding to the plurality of downlink BWPs comprise synchronization signal blocks or channel state information reference signals, CSI-RS.

A terminal device, comprising:

a processing unit, configured to measure a plurality of downlink reference signals corresponding to a plurality of downlink bandwidth portions BWP;

the processing unit is further configured to determine whether to switch from a first downlink BWP to a second downlink BWP according to measurement results of a plurality of downlink reference signals corresponding to the plurality of downlink BWPs, where the first downlink BWP is an active BWP, and the first downlink BWP and the second downlink BWP belong to the plurality of downlink BWPs.

The terminal device of claim 31, wherein the measurement result comprises at least one of:

reference signal received power RSRP corresponding to BWP, reference signal received quality RSRQ corresponding to BWP, reference signal-to-carrier interference-plus-noise ratio RS-SINR corresponding to BWP, and channel quality indicator CQI corresponding to BWP.

The terminal device according to claim 31 or 32, wherein the processing unit is specifically configured to:

if the measurement result of the downlink reference signal corresponding to the second downlink BWP is greater than the measurement result of the downlink reference signal corresponding to the first downlink BWP, switching from the first downlink BWP to the second downlink BWP.

The terminal device according to claim 31 or 32, wherein the processing unit is specifically configured to:

if the difference between the measurement result of the downlink reference signal corresponding to the second downlink BWP and the measurement result of the downlink reference signal corresponding to the first downlink BWP is greater than a first threshold, switching from the first downlink BWP to the second downlink BWP.

The terminal device according to claim 34, wherein the first threshold is preset, or the first threshold is preconfigured by a network device through signaling.

The terminal device according to any of claims 33 to 35, wherein the measurement result of the downlink reference signal corresponding to the second downlink BWP is largest among the measurement results of the plurality of downlink reference signals corresponding to the plurality of downlink BWPs.

The terminal device according to any of claims 31 to 36, wherein if the terminal device determines to switch from the first downlink BWP to the second downlink BWP, the terminal device further comprises:

a communication unit, configured to send a first uplink signal to indicate information of the second downlink BWP and/or information of an uplink BWP corresponding to the second downlink BWP before the terminal device switches from the first downlink BWP to the second downlink BWP.

The terminal device according to claim 37, wherein the first uplink signal comprises index information of the second downlink BWP and/or index information of an uplink BWP corresponding to the second downlink BWP.

The terminal device of claim 37, wherein the communication unit is specifically configured to:

and sending the first uplink signal on an uplink BWP corresponding to the first downlink BWP according to a first correspondence relationship, where the first uplink signal corresponds to index information of the second downlink BWP, the first correspondence relationship is a correspondence relationship between a plurality of uplink information and indexes of the plurality of downlink BWPs, and the plurality of uplink information includes the first uplink signal.

The terminal device of claim 39, wherein the first corresponding relationship is preset, or wherein the first corresponding relationship is preconfigured by a network device through signaling.

The terminal device according to any of claims 37 to 40, wherein the first uplink signal is one of:

a random access preamble, a dedicated scheduling request SR, a dedicated sounding reference signal SRs, a medium access control element MAC CE signaling, or a radio resource control RRC message.

The terminal device according to any of claims 37 to 41, wherein the communication unit is further configured to receive configuration information of the first uplink signal.

The terminal device of claim 42, wherein the communication unit is specifically configured to:

and receiving configuration information of the first uplink signal when a measurement result of the downlink reference signal corresponding to the first downlink BWP is smaller than a second threshold.

The terminal device according to any of claims 31 to 36, wherein if the terminal device determines to switch from the first downlink BWP to the second downlink BWP, the terminal device further comprises:

a communication unit, configured to send a second uplink signal to indicate information of the second downlink BWP and/or information of an uplink BWP corresponding to the second downlink BWP after the terminal device switches from the first downlink BWP to the second downlink BWP.

The terminal device according to claim 44, wherein the second uplink signal comprises index information of the second downlink BWP and/or index information of an uplink BWP corresponding to the second downlink BWP.

The terminal device of claim 44, wherein the communication unit is specifically configured to:

and sending the second uplink signal on the uplink BWP corresponding to the second downlink BWP.

The terminal device of claim 44, wherein the communication unit is specifically configured to:

and sending the second uplink signal on an uplink BWP corresponding to the second downlink BWP according to a second correspondence relationship, where the second uplink signal corresponds to index information of the second downlink BWP, the second correspondence relationship is a correspondence relationship between a plurality of uplink information and indexes of the plurality of downlink BWPs, and the plurality of uplink information includes the second uplink signal.

The terminal device of claim 47, wherein the second mapping relationship is preset, or wherein the second mapping relationship is preconfigured by a network device through signaling.

The terminal device according to any of claims 44 to 48, wherein the second uplink signal is one of:

a random access preamble, a dedicated SR, a dedicated SRs, MAC CE signaling, or an RRC message.

The terminal device according to any one of claims 44 to 49, wherein the communication unit is further configured to receive configuration information of the second uplink signal.

The terminal device of claim 50, wherein the communication unit is specifically configured to:

and receiving configuration information of the second uplink signal when the measurement result of the downlink reference signal corresponding to the first downlink BWP is smaller than a third threshold.

The terminal device of any of claims 44-51, wherein a first duration is provided between a start time of the terminal device switching from the first downlink BWP to the second downlink BWP and a start time of transmitting the second uplink signal.

The terminal device of claim 52, wherein the first duration is preset, or wherein the first duration is preconfigured by the network device through signaling.

The terminal device according to any one of claims 31 to 53, wherein the plurality of downlink reference signals corresponding to the plurality of downlink BWPs are preset, or the plurality of downlink reference signals corresponding to the plurality of downlink BWPs are configured by the network device through signaling in advance.

The terminal device according to any one of claims 31 to 54, wherein the processing unit is specifically configured to:

and periodically measuring a plurality of downlink reference signals corresponding to the plurality of downlink BWPs.

The terminal device of claim 55, wherein a measurement period of the plurality of downlink reference signals corresponding to the plurality of downlink BWPs is preset, or wherein the measurement period of the plurality of downlink reference signals corresponding to the plurality of downlink BWPs is preconfigured by the network device through signaling.

The terminal device according to any of claims 31-56, wherein the processing unit is further configured to determine whether to perform an upstream BWP handover.

The terminal device of claim 57, wherein the processing unit is specifically configured to:

if the terminal device determines to switch from the first downlink BWP to the second downlink BWP, according to a third corresponding relationship, determining to switch from the uplink BWP corresponding to the first downlink BWP to the uplink BWP corresponding to the second downlink BWP, where the third corresponding relationship is a corresponding relationship between the plurality of downlink BWPs and the plurality of uplink BWPs.

The terminal device of claim 58, wherein the third mapping relationship is preset, or wherein the third mapping relationship is preconfigured by a network device through signaling.

The terminal device according to any of claims 31-59, wherein the plurality of downlink reference signals for the plurality of downlink BWPs comprise synchronization signal blocks or channel state information reference signals, CSI-RSs.

A terminal device, comprising: a processor and a memory, the memory for storing a computer program, the processor for invoking and executing the computer program stored in the memory, performing the method of any one of claims 1 to 30.

An apparatus, comprising: a processor for calling and running a computer program from a memory to cause a device in which the apparatus is installed to perform the method of any one of claims 1 to 30.

A computer-readable storage medium for storing a computer program which causes a computer to perform the method of any one of claims 1 to 30.

A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 30.

A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1 to 30.