WO2020143730A1

WO2020143730A1 - Communication method and communication apparatus

Info

Publication number: WO2020143730A1
Application number: PCT/CN2020/071273
Authority: WO
Inventors: 黎超; 王俊伟; 张兴炜
Original assignee: 华为技术有限公司
Priority date: 2019-01-11
Filing date: 2020-01-10
Publication date: 2020-07-16
Also published as: CN111436082B; CN111436082A

Abstract

The present application provides a communication method and device. The method comprises: a first terminal device acquires configuration information of a side link bandwidth part (BWP), the configuration information comprising configuration information of the side link BWP corresponding to a connection state, and the connection state being the connection state between a terminal device and a network device; and the first terminal device switches from a first side link BWP to a second side link BWP according to first configuration information and second configuration information in the configuration information, the first configuration information being the configuration information of the first side link BWP, and the second configuration information being the configuration information of the second side link BWP. The technical solution provided by the present application can reduce the interruption of communication caused by the switching of side link BWPs and improve the reliability of communication, and is applicable to Internet of vehicles such as V2X, LTE-V and V2V.

Description

Communication method and communication device

This application requires the priority of the Chinese patent application filed on January 11, 2019 in the Chinese Patent Office with the application number 201910028787.5 and the application name as "a communication method and communication device", the entire contents of which are incorporated by reference in this application .

Technical field

The present application relates to the field of communication, and more specifically, to a communication method and communication device.

Background technique

In the 5G NR system completed by the 3rd generation partnership (3GPP), the concept of bandwidth (part of bandwidth) (BWP) was introduced to enable terminal equipment to run on low bandwidth and reduce the cost of terminal equipment And power consumption, make 5G system more flexible in the configuration of bandwidth.

When the terminal device performs BWP handover, the base station (node, base, NB) needs to reconfigure the BWP parameters of the terminal device. During the parameter reconfiguration process, the radio frequency (RF) module needs to be switched, which will cause transmission interruption. Communication reliability is affected.

Therefore, how to reduce the interruption effect of BWP switching on communication and improve communication reliability has become an urgent problem to be solved.

Summary of the invention

The present application provides a communication method and a communication device, which can improve communication reliability.

In the first aspect, a method of communication is provided. The method provided in the first aspect may be executed by a first terminal device, or may be executed by a chip configured in the first terminal device, which is not limited in this application.

Specifically, the method includes: the first terminal device obtains configuration information of the bandwidth part BWP corresponding to at least two connection states respectively, the connection state is a connection state between the terminal device and the network device, and the at least two connection states include idle State, connection state or outside the network, the BWPs corresponding to the at least two connection states are used for side links; the first terminal device according to the configuration information of the first BWP and the configuration information of the second BWP in the configuration information, from The first BWP is switched to the second BWP; wherein, the first BWP and the second BWP belong to the BWP corresponding to the at least two connection states respectively.

In the communication method provided in the first aspect, the first terminal device obtains configuration information of the bandwidth part BWP corresponding to at least two connection states respectively, and according to the configuration information of the first BWP configuration information and the second BWP configuration information , Switching from the first BWP to the second BWP, where the first BWP and the second BWP belong to the BWP corresponding to the at least two connection states respectively. This method enables the terminal devices performing communication to perform the same BWP switching, reduces the communication interruption caused by the BWP switching, and improves the communication reliability.

In a possible implementation manner of the first aspect, the BWPs corresponding to the at least two connection states include: one BWP corresponding to the idle state; and/or, at least one BWP corresponding to the outside of the network, and/or, the connection state Corresponding to at least one BWP.

In a possible implementation manner of the first aspect, before the handover from the first BWP to the second BWP, the method further includes: the first terminal device receives handover instruction information from the network device or the second terminal device, where , The switching instruction information is used to instruct the first terminal device to switch from the first BWP to the second BWP; the switching from the first BWP to the second BWP includes: the first terminal device according to the configuration information The configuration information of a BWP, the configuration information of the second BWP, and the switching instruction information are switched from the first BWP to the second BWP.

In a possible implementation manner of the first aspect, when the first terminal device is in a connected state, the first terminal device receives the handover instruction information from the network device; or, when the first terminal device is in an idle state Or outside the network, the first terminal device receives the handover instruction information from the second terminal device.

In a possible implementation manner of the first aspect, before the handover from the first BWP to the second BWP, the method further includes: the first terminal device sends the handover instruction information to the third terminal device.

For example, when a terminal device performing BWP switching is outside the network, it cannot communicate with the network device, and the terminal device cannot receive the switching instruction information sent by the network device to instruct the terminal device to perform BWP switching. In order to realize the simultaneous switching of multiple BWPs, the connected first terminal device can send the switching instruction information to the terminal device outside the network through the side link to ensure that the terminal devices communicating in the communication system simultaneously switch BWP, reducing Communication interruption caused by multiple BWP handovers improves communication reliability.

In a possible implementation manner of the first aspect, the handover indication information is also used to indicate at least one of the following information: the time when the handover starts; the time when the handover is completed, or the duration of the BWP handover; in the second Transmission resources on BWP.

The switching start information is indicated by the switching instruction information, and/or the switching completion time or the duration of the BWP switching, the terminal device receiving the switching instruction information starts the BWP switching at the same time period, avoiding the switching caused by multiple BWPs at different times Communication was interrupted multiple times.

In a possible implementation manner of the first aspect, the first terminal device switches from the first BWP to the second BWP according to the configuration information of the first BWP and the configuration information of the second BWP in the configuration information, including : The first terminal device switches from the first BWP to the second BWP according to the configuration information of the first BWP and the configuration information of the second BWP in the configuration information, and the pre-configuration switching condition; the pre-configuration switching condition is Correspondence between the switching of the connection state of the first terminal device and the switching of BWP.

When the connection state between the first terminal device and the network device changes, for example, when the first terminal device is switched from outside the network to the idle state, the first terminal device performs BWP switching according to the pre-configured switching conditions pre-configured by the system.

In a possible implementation manner of the first aspect, the pre-configured switching condition includes: in a case where the first terminal device switches from a connected state to an idle state, the first terminal device corresponds to at least one of the connected state A BWP in the BWP switches to a BWP corresponding to the idle state; or in the case where the first terminal device switches from the idle state to the connected state, the first terminal device switches from a BWP corresponding to the idle state to the connection One BWP of the at least one BWP corresponding to the state; or in the case where the first terminal device switches from the connected state to the outside of the network, the first terminal device switches from a BWP corresponding to the connected state to at least the corresponding outside the network A BWP in a BWP; or in the case where the first terminal device is switched from outside the network to the connected state, the first terminal device is switched from a corresponding BWP outside the network to at least one BWP corresponding to the connected state A BWP; or when the first terminal device is switched from outside the network to the idle state, the first terminal device is switched from a corresponding BWP outside the network to a BWP corresponding to the idle state; or at the first terminal When the device switches from the idle state to the outside of the network, the first terminal device switches from a BWP corresponding to the idle state to one BWP of at least one BWP corresponding to the outside of the network.

In a possible implementation manner of the first aspect, the configuration information includes time-frequency resources of the BWP corresponding to the at least two connection states, wherein the time-frequency resources of the at least one BWP corresponding to the connection state correspond to the idle state A subset of the time-frequency resources of the BWP; and/or, the corresponding time-frequency resources of at least one BWP outside the network is a subset of the time-frequency resources of the BWP corresponding to the idle state; and/or, the corresponding The time-frequency resource of at least one BWP is a subset of the time-frequency resource of at least one BWP corresponding to the outside of the network; and/or the time-frequency resource of the BWP corresponding to the idle state is the time-frequency of at least one BWP corresponding to the outside of the network A subset of resources.

The configuration information configures the relationship between time-frequency resources between different connection states, so that terminal devices in different connection states can also communicate normally.

In a possible implementation manner of the first aspect, before the handover from the first BWP to the second BWP, the method further includes: the first terminal device sends the BWP handover supported by the first terminal device to the network device Delay type; wherein, different switching delay types of BWP supported by the first terminal device correspond to different BWP switching delays.

Different BWP types have different handover delays. In order to realize the simultaneous switching of multiple BWPs, the terminal device needs to send the supported BWP type to the network device to determine the switching duration before performing the BWP switching.

In a possible implementation manner of the first aspect, the method further includes: the first terminal device obtains a first switching duration, where the first switching duration is a BWP switching duration supported by a pair of terminal devices or a group of terminal devices The maximum value of the BWP handover delay corresponding to the delay type; the first terminal device does not send data within the first handover time period after the start of handover.

After receiving the supported BWP switching delay type sent by the terminal device, the network device determines that the maximum value of the switching duration corresponding to the BWP switching delay type is the duration of simultaneous switching, that is, the first switching duration. Within the first handover duration, when the handover delay corresponding to a supported BWP type is less than the first handover duration, the terminal device does not send data after the handover is complete, and does not send data before the end of the first handover duration. The communication terminal device has not been switched, and normal communication cannot be performed.

In a possible implementation manner of the first aspect, the method further includes: after switching from the first BWP to the second BWP, the first terminal device receives first indication information, where the first indication information is used for The first terminal device determines that the first BWP handover is successful.

In a possible implementation manner of the first aspect, the first indication information includes at least one of the following: indication information of the first BWP; indication information of the second BWP; time interval information, the time interval information Indicates the interval between the start time or completion time of the handover from the first BWP to the second BWP and the transmission time of the first indication information.

In a possible implementation manner of the first aspect, the method further includes: after the handover from the first BWP to the second BWP, the first terminal device sends second indication information, where the second indication information is used It is determined that the first BWP handover is successful.

In a possible implementation manner of the first aspect, the second indication information includes at least one of the following: indication information of the first BWP; indication information of the second BWP; indication of successful BWP handover.

After the first terminal device is switched from the first BWP to the second BWP, in order to determine that the first terminal device is successfully switched, the first terminal device and the network device may send instruction information to each other to determine that the first terminal device is successfully switched . For example, the network device sends first indication information to the first terminal device, or the first terminal device sends second indication information to the network device.

In a possible implementation manner of the first aspect, the handover indication information is also used to indicate that the currently activated M BWPs are switched at the same time. The M BWPs include the BWP of the side link and the BWP of the cellular link, where M is Positive integer greater than 1.

In a possible implementation manner of the first aspect, the BWP of the side link and the BWP of the cellular link are on one carrier or multiple carriers.

In a possible implementation manner of the first aspect, the method further includes: before the currently activated M BWPs are simultaneously switched, the first terminal device sends the following information to the network device: whether to support simultaneous switching of the cellular link The total number of BWP and BWP of the side link; or the total number of BWP that supports simultaneous switching of the cellular link and the BWP of the side link; and/or the simultaneous switching of the BWP of the cellular link and the side Under the condition of the BWP of the downlink, the number of simultaneous BWP handovers supported by the cellular link and the number of BWP simultaneously switched among the BWPs supporting the side link; or the BWP supporting the switching of the cellular link and the side line at the same time Under the BWP condition of the link, it supports simultaneous switching of the BWP switching delay or the switching delay type of the cellular link and the BWP switching delay or the switching delay type of the side link.

The handover instruction information indicates that the currently simultaneously activated cellular link BWP and the side link BWP are simultaneously switched, which avoids the interruption of communication to other working BWP when part of the BWP is switched due to the inconsistent switching time in the simultaneously activated BWP.

In the second aspect, a communication method is provided. The method provided in the second aspect may be executed by a first terminal device, or may be executed by a chip configured in the first terminal device, which is not limited in this application.

Specifically, the method includes: the first terminal device obtains first switching instruction information, where the first switching instruction information is used to indicate the currently activated switching of M bandwidth parts BWP, where M is a positive integer greater than 1; the first A terminal device performs BWP switching according to the first switching instruction information.

In order to avoid that some BWP switching causes interference to other BWPs working at the same time, the first terminal device receives the first indication information and instructs that the BWPs that are simultaneously activated are switched simultaneously.

In a possible implementation manner of the second aspect, the link types of the currently activated M BWPs are the same or different, where the link types of the BWP include: the BWP of the cellular link and the BWP of the side link .

In a possible implementation manner of the second aspect, the first handover indication information includes any one of the following: indicating that N BWPs of the currently activated M BWPs are simultaneously switched, where N is not greater than M A positive integer; indicates whether N BWPs of the currently activated M BWPs are switched simultaneously, where N is a positive integer not greater than M; indicates that N BWPs of the currently activated M BWPs are switched, where N It is a positive integer not greater than M; indication information indicating whether to switch the BWP of the cellular link and the BWP of the side link at the same time.

In a possible implementation manner of the second aspect, the method includes: before performing BWP switching according to the first switching instruction information, reporting the following information to the network device: whether simultaneous activation of more than one BWP is supported; or simultaneous activation is supported The number of BWP; or whether it supports the simultaneous activation of the BWP of the cellular link and the BWP of the side link; or the total number of BWP that supports the simultaneous activation of the cellular link and the BWP of the side link; and/or Under the condition of supporting simultaneous activation of the BWP of the cellular link and the BWP of the side link, the number of simultaneous activations of the BWP of the cellular link and the number of simultaneous activations of the BWP supporting the side link; or whether it supports simultaneous Switching the BWP of the cellular link and the BWP of the side link; or the total number of BWPs supporting the switching of the cellular link and the BWP of the side link simultaneously; and/or supporting the switching of the switching cellular link simultaneously The number of BWPs that support the cellular link and the number of BWPs that can switch simultaneously in the BWP that supports the side link; or the BWP that supports the simultaneous switching of the cellular link The switching delay or switching delay type of the BWP of the side link; or the switching delay or switching delay type of the BWP supporting multiple same links.

In a possible implementation manner of the second aspect, the first handover indication information is carried by any one or more of SIB, RRC, MAC CE, or DCI.

In a possible implementation manner of the second aspect, the value of M is 2, and the value of N is 1 or 2.

In the embodiment of the present application, the N BWPs that are switched simultaneously may be BWPs of the same type, for example, the N BWPs are N cellular link BWPs or N side link BWPs. It can also be a different type of BWP, for example, N BWPs include a cellular link BWP and a side link BWP. This embodiment of the present application does not limit this.

In a possible implementation manner of the second aspect, the M BWPs are on one carrier or multiple different carriers.

In a possible implementation manner of the second aspect, the method further includes: before performing BWP handover according to the first handover instruction information, acquiring the BWP of the cellular link and/or the BWP of the side link Configuration information.

Optionally, the configuration information may be sent by the network device to the terminal device. For example, the network device sends configuration information to the terminal device through configured broadcast or multicast configuration signaling. The configuration signaling may be any one or a combination of SIB, RRC, MAC or DCI.

In a third aspect, a communication method is provided. The method provided in the third aspect may be executed by the first terminal device, or may be executed by a chip configured in the first terminal device, which is not limited in this application.

Specifically, the method includes: the first terminal device acquires configuration information of a timer corresponding to the first bandwidth part BWP of the side link; the first terminal device manages the timer according to the configuration information of the timer; When the timer expires, the first BWP of the side link is switched to the second BWP of the side link, where the first BWP of the side link is the BWP of the currently activated side link. The second BWP is the BWP of the side link of the terminal device in the idle state or the BWP used for the side link outside the network.

In a possible implementation manner of the third aspect, the timer expiration means that the value of the timer exceeds a predefined, signaling configuration, or pre-configured timer duration.

In a possible implementation manner of the third aspect, the timing configuration information includes: the step size of the timer and/or the duration of the timer.

The configuration information manages the timer by configuring the timer step size and/or timer duration. For example, when the value of the timer exceeds the preset timer value, the timer expires.

In a possible implementation manner of the third aspect, the timer step size and/or the timer duration is associated with at least one of the following parameters: the service type of the side link; the side link The quality of service parameters; the subcarrier spacing value of the side link; the resource pool used by the side link; the waveform type of the side link.

The step size of the timer and/or the duration of the timer can be adaptively configured according to actual needs. For example, when the quality of service of the side link is high, the step size of the timer and/or the duration of the timer are smaller. The specific parameters depend on the actual needs.

In a possible implementation manner of the third aspect, the method further includes: if the first condition is satisfied, starting or restarting the timer.

When the first condition is satisfied, if the current timer is not started, the timer is started at this time. When the first condition is met next time, the timer restarts. If, when the first condition is satisfied, the timer has been started, the timer is restarted.

In a possible implementation manner of the third aspect, the first condition includes any one of the following conditions: the terminal device is in a connected state and receives downlink control information for scheduling a cellular link sent by the network device; the terminal device The downlink control information for scheduling the side link sent by the network device is detected; the terminal device sends the buffer status of the side link, the scheduling request of the side link, the HARQ response message of the side link to the network device or The CSI feedback information of the side link; the terminal device receives the ACK response information of the side link; the terminal device successfully detects the side control information SCI of the side link.

In a possible implementation manner of the third aspect, the managing the timer includes: when the timer is running and the timer does not detect any of the following information within the corresponding step time, increase The value of this timer: when the network device sends downlink control information for scheduling the cellular link; when the network device sends downlink control information for scheduling the side link; when the side link ACK response information; when the side link When the side control information is SCI.

By managing timers, the timer values of the network device and the terminal device are compared to determine whether the understanding of scheduling information between the network device and the terminal device is consistent. If the timer value is the same, it means that the understanding of the scheduling information is consistent and the communication is normal; if the timer value is different, it means that the understanding of the scheduling information is inconsistent and the network device and the terminal device cannot communicate normally.

In a possible implementation manner of the third aspect, the time of each step of the timer is pre-configured according to the transmission resource of the side link.

In a possible implementation manner of the third aspect, the method further includes: when the timer expires, the first terminal device in the connected state sends the network device an indication message that the timer expires or the terminal device wants Instruction information to perform BWP handover of the side link.

When the timer expires, it indicates that the terminal device and the network device cannot communicate normally, so BWP switching is required. Then, the first terminal device sends the indication information that the timer expires to the network device, and after receiving the indication information that the timer expires, the network device instructs the first terminal device to perform a BWP switch, for example, the network device sends the switch to the first terminal device Instructions.

In a fourth aspect, a communication method is provided. The method provided in the fourth aspect may be performed by a network device or a chip configured in the network device, which is not limited in this application.

Specifically, the method includes: the network device determines configuration information of the bandwidth part BWP corresponding to at least two connection states of the first terminal device, the connection state is a connection state between the terminal device and the network device, and the at least two connection states The BWP corresponding to the at least two connection states, including the idle state, the connected state, or outside the network, is used for the side link; the network device sends the configuration information to the first terminal device.

For example, the network device sends configuration information to the first terminal device through configured broadcast or multicast configuration signaling. The configuration signaling may be any one or a combination of SIB, RRC, MAC CE or DCI.

In a possible implementation manner of the fourth aspect, the BWPs corresponding to the at least two connection states respectively include: one BWP corresponding to the idle state; and/or, at least one BWP corresponding to the outside of the network, and/or, the connection state Corresponding to at least one BWP.

In a possible implementation manner of the fourth aspect, the method further includes: when the first terminal device is in a connected state, the network device sends handover instruction information to the first terminal device, where the handover instruction information is used To instruct the first terminal device to switch from the first BWP to the second BWP.

For example, the first BWP is the BWP corresponding to the connected state, and the second BWP is the BWP corresponding to the connected state; or the first BWP is the BWP corresponding to the connected state, and the second BWP is the BWP corresponding to the idle state; or the first A BWP is a BWP corresponding to a connected state, the second BWP is a corresponding BWP outside the network; or the first BWP is a BWP corresponding to an idle state, and the second BWP is a BWP corresponding to a connected state; or the first BWP is idle The second BWP is the corresponding BWP outside the network; or the first BWP is the corresponding BWP outside the network; the second BWP is the BWP corresponding to the connected state; or the first BWP is the corresponding BWP outside the network. , The second BWP is the BWP corresponding to the idle state.

In a possible implementation manner of the fourth aspect, the handover indication information is also used to indicate at least one of the following information: the time when the handover starts; the time when the handover is completed, or the duration of the BWP handover; in the second Transmission resources on BWP.

In a possible implementation manner of the fourth aspect, the method further includes: the network device sends a pre-configured switching condition to the first terminal device, where the pre-configured switching condition is the switching of the connection state of the first terminal device and the BWP Correspondence of switching.

In a possible implementation manner of the fourth aspect, the pre-configured switching condition includes: in a case where the first terminal device switches from a connected state to an idle state, the first terminal device corresponds to at least one corresponding to the connected state A BWP in the BWP switches to a BWP corresponding to the idle state; or in the case where the first terminal device switches from the idle state to the connected state, the first terminal device switches from a BWP corresponding to the idle state to the connection One BWP of the at least one BWP corresponding to the state; or in the case where the first terminal device switches from the connected state to the outside of the network, the first terminal device switches from a BWP corresponding to the connected state to at least the corresponding outside the network A BWP in a BWP; or in the case where the first terminal device is switched from outside the network to the connected state, the first terminal device is switched from a corresponding BWP outside the network to at least one BWP corresponding to the connected state A BWP; or when the first terminal device is switched from outside the network to the idle state, the first terminal device is switched from a corresponding BWP outside the network to a BWP corresponding to the idle state; or at the first terminal When the device switches from the idle state to the outside of the network, the first terminal device switches from a BWP corresponding to the idle state to one BWP of at least one BWP corresponding to the outside of the network.

In a possible implementation manner of the fourth aspect, the configuration information includes time-frequency resources of the BWP corresponding to the at least two connection states, wherein the time-frequency resources of the at least one BWP corresponding to the connection state correspond to the idle state A subset of the time-frequency resources of the BWP; and/or, the corresponding time-frequency resources of at least one BWP outside the network is a subset of the time-frequency resources of the BWP corresponding to the idle state; and/or, the corresponding The time-frequency resource of at least one BWP is a subset of the time-frequency resource of at least one BWP corresponding to the outside of the network; and/or the time-frequency resource of the BWP corresponding to the idle state is the time-frequency of at least one BWP corresponding to the outside of the network A subset of resources.

In a possible implementation manner of the fourth aspect, the method further includes: the network device receiving the BWP handover delay type supported by the first terminal device and sent by the first terminal device; wherein, the first terminal device supports Different BWP switching delay types correspond to different BWP switching delays.

In a possible implementation manner of the fourth aspect, the method further includes: the network device sends a first switching duration to the first terminal device, where the first switching duration is supported by a pair of terminal devices or a group of terminal devices The maximum value of the BWP switching delay corresponding to the type of BWP switching delay; the first terminal device does not send data within the time of the first switching duration after starting the switching.

In a possible implementation manner of the fourth aspect, the first indication information includes at least one of the following: indication information of the first BWP; indication information of the second BWP; time interval information, the time interval information Indicates the interval between the start time or completion time of the handover from the first BWP to the second BWP and the transmission time of the first indication information.

In a possible implementation manner of the fourth aspect, the method further includes: the network device receives second indication information sent by the first terminal device, where the second indication information is used to determine that the first BWP handover is successful .

In a possible implementation manner of the fourth aspect, the second indication information includes at least one of the following: indication information of the first BWP; indication information of the second BWP; indication of successful BWP handover.

In a possible implementation manner of the fourth aspect, the handover indication information is also used to instruct the currently activated M BWPs to switch simultaneously. The M BWPs include the BWP of the side link and the BWP of the cellular link, where M is Positive integer greater than 1.

In a possible implementation manner of the fourth aspect, the BWP of the side link and the BWP of the cellular link are on one carrier or multiple carriers.

In a possible implementation manner of the fourth aspect, the method further includes: before the currently activated M BWPs are simultaneously switched, the network device receives the following information sent by the first terminal device: whether to support simultaneous switching of the cellular The BWP of the link and the BWP of the side link; or the total number of BWPs that support simultaneous switching of the cellular link and the BWP of the side link; and/or the BWP and Under the BWP condition of the side link, the number of simultaneous BWP handovers supported by the cellular link and the number of BWP simultaneously switched among the BWPs supporting the side link; or BWP and the Under the BWP condition of the side link, the switching delay or the switching delay type of the BWP of the cellular link and the switching delay or the switching delay type of the BWP of the side link are simultaneously supported.

In a fifth aspect, a communication method is provided. The method provided in the fifth aspect may be performed by a network device or a chip configured in the network device, which is not limited in this application.

Specifically, the method includes: the network device determines first switching instruction information of the first terminal device, wherein the first switching instruction information is used to indicate the currently activated switching of M bandwidth parts BWP, where M is a positive integer greater than 1 The network device sends the first switching instruction information to the first terminal device.

In a possible implementation manner of the fifth aspect, the currently activated M BWPs have the same or different link types, where the BWP link types include: cellular link BWP and side link BWP .

In a possible implementation manner of the fifth aspect, the first switching indication information includes any one of the following: indicating that N BWPs of the currently activated M BWPs perform switching simultaneously, where N is not greater than M A positive integer; indicates whether N BWPs of the currently activated M BWPs are switched simultaneously, where N is a positive integer not greater than M; indicates that N BWPs of the currently activated M BWPs are switched, where N It is a positive integer not greater than M; indication information indicating whether to switch the BWP of the cellular link and the BWP of the side link at the same time.

In a possible implementation manner of the fifth aspect, the method includes: before the first terminal device performs BWP switching according to the first switching instruction information, the network device receives the following information sent by the first terminal device: Whether it supports simultaneous activation of more than one BWP; or the number of simultaneously activated BWP; or whether it supports simultaneous activation of the BWP of the cellular link and the BWP of the side link; or the simultaneous activation of the BWP of the cellular link and the side line The total number of BWPs of the link; and/or the number of simultaneous activations of the BWP of the cellular link and the support of the sidechain, provided that the BWP of the cellular link and the BWP of the sidelink are supported simultaneously The number of simultaneous BWP activations of the channel; or whether it supports the simultaneous switching of the BWP of the cellular link and the BWP of the side link; or the total number of simultaneous switching of the BWP of the cellular link and the BWP of the side link; And/or under the condition of supporting the simultaneous switching of the BWP of the switching cellular link and the BWP of the side link, the number of simultaneous switching of the BWP of the cellular link and the number of simultaneous switching of the BWP of the BWP supporting the side link ; Or support the switching delay or switching delay type of the BWP of the cellular link and the BWP of the side link at the same time; or support the switching delay or switching delay type of multiple BWPs of the same link.

In a possible implementation manner of the fifth aspect, the first handover indication information is carried by any one or more of SIB, RRC, MAC CE, or DCI.

In a possible implementation manner of the fifth aspect, the value of M is 2, and the value of N is 1 or 2.

In a possible implementation manner of the fifth aspect, the M BWPs are on one carrier or multiple different carriers.

In a possible implementation manner of the fifth aspect, the method further includes: before performing BWP handover according to the first handover instruction information, acquiring the BWP of the cellular link and/or the BWP of the side link Configuration information.

In the sixth aspect, a communication method is provided. The method provided in the sixth aspect may be performed by a network device or a chip configured in the network device, which is not limited in this application.

Specifically, the method includes: the network device determines the configuration information of the timer corresponding to the first bandwidth part BWP of the first terminal device; the network device sends the configuration information to the first terminal device. The configuration information is used by the first terminal device to manage the timer. If the timer expires, switch from the first BWP of the side link to the BWP of the second side link, where the first BWP of the side link is the BWP of the currently activated side link, and the second side The downlink BWP is the BWP of the side link of the terminal device in the idle state or the BWP of the side link used outside the network.

In a possible implementation manner of the sixth aspect, the timer expiration means that the value of the timer exceeds a predefined, signaling configuration, or pre-configured timer duration.

In a possible implementation manner of the sixth aspect, the timing configuration information includes: the step size of the timer and/or the duration of the timer.

In a possible implementation manner of the sixth aspect, the timer step size and/or the timer duration is associated with at least one of the following parameters: service type of the side link; side link The quality of service parameters; the subcarrier spacing value of the side link; the resource pool used by the side link; the waveform type of the side link.

In a possible implementation manner of the sixth aspect, the managing the timer includes: when the timer is running and the timer does not detect any of the following information within the corresponding step time, increase The value of this timer: when the network device sends downlink control information for scheduling the cellular link; when the network device sends downlink control information for scheduling the side link; when the side link ACK response information; when the side link When the side control information is SCI.

In a possible implementation manner of the sixth aspect, the time of each step of the timer is pre-configured according to the transmission resource of the side link.

In a possible implementation manner of the sixth aspect, the method further includes: when the timer expires, the first terminal device in the connected state sends the network device an indication message that the timer expires or the terminal device wants Instruction information to perform BWP handover of the side link.

In a seventh aspect, a communication device is provided. The communication apparatus may be used to perform the operation of the terminal device in the first aspect and any possible implementation manner of the first aspect, or to perform the operation of the terminal device in the second aspect and any possible implementation manner of the second aspect Operation, or used to perform the operation of the terminal device in the third aspect and any possible implementation manner of the third aspect, specifically, the communication apparatus includes the method described in any of the first aspect to the third aspect Corresponding to the steps or functions. This step or function can be implemented by software, or by hardware, or by a combination of hardware and software.

In an eighth aspect, a communication device is provided. The communication apparatus may be used to perform the operation of the terminal device in the fourth aspect and any possible implementation manner of the fourth aspect, or to perform the operation of the terminal device in the fifth aspect and any possible implementation manner of the fifth aspect Operation, or used to perform the operation of the terminal device in the sixth aspect and any possible implementation manner of the sixth aspect, specifically, the communication device includes the method described in any of the fourth aspect to the sixth aspect Corresponding to the steps or functions. This step or function can be implemented by software, or by hardware, or by a combination of hardware and software.

In a ninth aspect, a computer program product is provided. The computer program product includes: a computer program (also referred to as code or instructions) that, when the computer program is executed, causes the computer to perform the first to sixth aspects Any one of the possible implementation methods of communication.

According to a tenth aspect, there is provided a computer-readable storage medium that stores a program that causes a server in a computer to perform any one of the first to sixth aspects and various implementations thereof Kinds of communication methods.

In other words, the computer-readable storage medium is used to store computer software instructions for the above-mentioned server, which includes instructions designed to perform any of the communication methods in any possible implementation manner of any of the first to sixth aspects program.

According to an eleventh aspect, a chip system is provided. The chip system includes a processor for supporting a server in a computer to implement the functions involved in the foregoing first to sixth aspects and various implementations thereof.

BRIEF DESCRIPTION

Figure 1 is a schematic diagram of a D2D scene;

Figure 2 is a schematic diagram of a V2X scene;

3 is a schematic diagram of four scenarios of BWP reconfiguration according to an embodiment of the present application;

4 is a schematic flowchart of a communication method provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a scenario where a side link is used to send information;

6 is a schematic diagram of a handover preparation window provided in an embodiment of the present application;

7 is a schematic flowchart of a communication method provided by another embodiment of the present application;

8 is a schematic flowchart of a communication method according to another embodiment of the present application;

9 is a schematic block diagram of a communication device provided by an embodiment of the present application;

10 is a schematic structural diagram of a first terminal device applicable to an embodiment of the present application;

11 is a schematic block diagram of a communication device according to another embodiment of the present application;

12 is a schematic structural diagram of a network device applicable to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

The technical solutions of the embodiments of the present application may be applied to communication between terminal devices and terminal devices in various scenarios. For example, device-to-device (D2D) scenarios, vehicle-to-outside information exchange (vehicle to everything, V2X) scenarios, machine communication (machine type communication (MTC)/machine-to-machine communication (M2M) Scenes, etc.

It should be noted that the technical solutions of the embodiments of the present application can also be applied to communication between the serving base station and terminal devices in various scenarios, such as cellular link communication. For ease of description, the embodiments of the present application take side link communication as an example, but the embodiments of the present application are not limited to this.

The terminal device in the embodiments of the present application may refer to user equipment, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or User device. Terminal devices can also be cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (personal digital assistants, PDAs), and wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or public land mobile communication networks (PLMN) in the future evolution The terminal device and the like are not limited in this embodiment of the present application.

In order to facilitate understanding of the solutions of the embodiments of the present application, the concepts and related technologies involved in the present application are first described.

Communication between devices (device to device, D2D): In order to improve spectrum utilization and maximize the use of the RF capabilities of existing terminal equipment, D2D communication links (called sidelinks, sidelinks, SL) consider multiplexing existing Spectrum resources of mobile communication networks. In order not to interfere with the terminal equipment of the existing network, D2D communication does not use the downlink (DL) spectrum resources of the advanced long-term evolution (advanced-advanced, LTE-A) system, but only reuses the uplink (downlink, DL) spectrum resources of the LTE-A system. Uplink (UP) spectrum resources, because relatively speaking, the anti-interference ability of the base station is much better than ordinary terminal equipment. D2D devices are more likely to time-division multiplex the uplink spectrum resources, so that they do not need to support simultaneous transmission and reception, and only need to send or receive at a time. In the Rel-12/13 version, D2D scenarios can be divided into three types with network coverage, partial network coverage, and no network coverage, as shown in Figure 1. D2D devices are within the coverage of network devices in scenarios with network coverage; in some network coverage scenarios, some D2D devices are within the coverage of network devices, and other D2D devices are not in the coverage of network devices; in scenarios without network coverage , All D2D devices are not in the coverage of network devices. If the terminal equipment can hear the signal of the network equipment, it is the terminal equipment in the network coverage; if the terminal equipment can hear the signal of other terminal equipment in the network coverage, it is part of the network coverage terminal equipment; if the terminal equipment can not receive the network equipment The signal cannot receive the signal of other terminal equipment within the network coverage, and is the terminal equipment outside the network coverage.

Vehicle to outside information exchange (vehicle to everything, V2X): In the Rel-14/15/16 version, V2X as a major application of D2D technology was successfully established. V2X will optimize the specific application requirements of V2X on the basis of the existing D2D technology. It is necessary to further reduce the access delay of V2X equipment and solve the resource conflict problem. V2X includes vehicle networking or vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), vehicle-to-infrastructure communication or network (vehicle to infrastructure/network, V2I/N). Application requirements are shown in Figure 2. Specifically, V2V refers to inter-vehicle communication based on a long-term evolution (LTE) system; V2P refers to communication between LTE-based vehicles and people (including pedestrians, cyclists, drivers, or passengers); V2I refers to the communication between LTE-based vehicles and roadside units (RSUs). There is also a V2N that can be included in V2I. V2N refers to the communication between LTE-based vehicles and base stations/networks. There are two types of roadside devices: terminal-type RSUs. Because they are placed on the roadside, the terminal-type RSUs are in a non-mobile state and do not need to consider mobility; base station-type RSUs can provide timing synchronization to vehicles that communicate with them. And resource scheduling.

FIG. 3 is a schematic diagram of four possible scenarios to which embodiments of the present application can be applied. In the coordinate system shown in FIG. 3, the vertical axis is a time axis in microseconds (us), and the horizontal axis is a frequency axis in megahertz (MHz). Carrier 1 and carrier 2 are two different carriers. It should be understood that the embodiment of the present application only uses multiple terminal devices working on two carriers as an example for description. In practice, the terminal device may also work on multiple carriers such as 3, 5 and so on. This is not limited.

Scenario 1: Changing the center frequency of BWP. Corresponding to the terminal device 1 operating on the carrier 1 in FIG. 3, the BWP bandwidth before switching is 100 MHz, and the center frequency is 50 MHz. The center frequency of the BWP after switching is 150 MHz, but the bandwidth of the BWP has not changed.

Scenario 2: The bandwidth of BWP is changed, but the center frequency of BWP is not changed. Corresponding to the terminal device 2 working on the carrier 2 in FIG. 3, the BWP bandwidth before switching is 100MHz, the center frequency is 100MHz, and the BWP bandwidth after switching is 200MHz, but the center frequency is not changed and is still 100MHz .

Scenario 3: Simultaneously changing the center frequency and bandwidth of BWP. Corresponding to the terminal device 3 working on the carrier 1 in FIG. 3, the BWP bandwidth before switching is 200MHz, the center frequency is 100MHz, the BWP bandwidth after switching is 100MHz, and the center frequency is 350MHz. Before and after switching, the working Both the BWP bandwidth and the center frequency are changed.

Scenario 4: The center frequency and bandwidth of BWP are not changed, only some baseband configurable parameters are changed. Corresponding to the terminal device 4 working on the carrier 2 in FIG. 3, the BWP bandwidth before switching is 100MHz, the center frequency is 350MHz, the BWP bandwidth after switching is 100MHz, and the center frequency is 350MHz. Before and after switching, the working The BWP bandwidth and center frequency are not changed, only some of the baseband parameters are changed, such as the type of subcarrier spacing (SCS) and cyclic prefix (CP).

When the above four scenarios perform BWP switching in different frequency ranges, the switching delay requirements are different. At present, the corresponding frequency range is divided into frequency range 1 (Frequency Range1, FR1) and frequency range 2 (Frequency Range2, FR2), where the frequency corresponding to FR1 is less than 6 GHz, and the frequency corresponding to FR2 is greater than 6 GHz. Table 1 shows the switching delay parameters of BWP in four different scenarios shown in FIG. 3 in different frequency ranges.

Table 1 BWP switching delay parameters

Type 1 and type 2 in Table 1 represent the two types of BWP. Different BWP types correspond to different BWP switching delays. As can be seen from Table 1, for the same scenario, the type 2 corresponding BWP switching delay is greater than BWP switching delay corresponding to type 1. For example, in scenario 1, the BWP switching delay corresponding to type 1 is 600us, and the BWP switching delay corresponding to type 2 is 2000us; in scenario 4, the BWP switching delay corresponding to type 1 is 400us, and the BWP switching delay corresponding to type 2 The extension is 950us.

It can be further seen from Table 1 that no matter what scenario and type of BWP is switched, there will be a certain switching delay (maximum 2000us, minimum 400us). When there are multiple terminal devices performing BWP switching during the communication process, due to the inconsistent switching time, even if the switching is performed at the same time, due to the different switching delay of different types of BWP, when some terminal devices complete the BWP switching, the other part of the terminal devices Failure to complete the BWP switch will cause the interruption of communication transmission, affect the communication service, and reduce the communication quality and reliability. Therefore, when the terminal device performs BWP handover, it is necessary to reduce the interruption caused by the BWP handover as much as possible, and reduce the impact of the BWP handover on the communication quality and reliability.

The embodiments of the present application provide a communication method, which can effectively reduce communication interruption caused by BWP switching and improve communication quality and reliability.

FIG. 4 is a schematic flowchart of a communication method 400 provided by an embodiment of the present application. The method 400 includes S401 to S408, where S402 to S405, S407, and S408 are optional steps. These steps will be described in detail below.

In the embodiment of the present application, the first terminal device obtains the configuration information of the BWP corresponding to at least two connection states, and according to the configuration information of the first BWP and the configuration information of the second BWP in the configuration information, the first terminal device Switching the first BWP to the second BWP reduces communication interruption caused by the first terminal device during BWP switching, thereby improving communication reliability.

S401. The first terminal device obtains configuration information of the bandwidth part BWP corresponding to at least two connection states.

Among them, the connection state is the connection state between the terminal device and the network device, including the connection state, out-of-network and idle state. The BWPs corresponding to the at least two connection states are used for the side link.

It should be noted that, for ease of description, the BWPs that are not explained below refer to the side link BWP.

In the method provided in the embodiment of the present application, different connection states of the terminal device respectively correspond to corresponding BWPs, so when the connection state of the terminal device and the network device changes, there may be a BWP switch. For example, the terminal device changes from the connected state to the idle state, or from the idle state to the connected state. For normal communication, the terminal device needs to switch from a BWP corresponding to the connected state to a BWP corresponding to the idle state. Before the terminal device performs BWP switching, it is necessary to acquire corresponding configuration information, and the terminal device performs corresponding BWP switching according to the acquired configuration information.

Optionally, the connection state of the terminal device changes differently, and the BWP switching performed is also different. For example, the terminal device switches between the BWP corresponding to the connected state and the corresponding BWP outside the network; and/or, the terminal device switches between the BWP corresponding to the connected state and the BWP corresponding to the idle state; and/or, the terminal device is on the network Switch between the BWP corresponding to the external state and the BWP corresponding to the idle state.

Optionally, the BWPs corresponding to the at least two connection states may be one BWP corresponding to the idle state and at least one BWP corresponding to the outside of the network; or, one BWP corresponding to the idle state and at least one BWP corresponding to the connected state; or the network At least one BWP corresponding to the external and/or at least one BWP corresponding to the connected state.

Optionally, the configuration information may be sent by the network device to the first terminal device. For example, the network device sends configuration information to the first terminal device through configured broadcast or multicast configuration signaling. The configuration signaling may be a system message block (system information block, SIB), radio resource control (radio resource control, RRC), media access control (media access control, MAC), or a downlink control signal (download control signal, DCI).

S402. The first terminal device sends the BWP switching delay type supported by the first terminal device to the network device.

In order to realize the simultaneous switching of multiple BWPs and reduce the communication interruption caused by BWP switching, all BWP switching needs to be completed at the same time. Since the switching time is related to the type of BWP, as shown in Table 1, the type of BWP is different, and the switching delay is different. Therefore, before performing BWP handover, the terminal device performing BWP handover reports the supported BWP handover delay type to the network device.

S403. The network device determines the first switching duration.

The network device determines the switching duration corresponding to the BWP supported by the terminal device according to Table 1 according to the supported BWP switching delay type reported by the first terminal device. It is determined that the maximum value of the switching delay in the BWP switching delay type supported by the first terminal device reported by the first terminal device is the first switching time.

For example, when the communication service is a unicast service, the first handover duration is the maximum value of the handover delay reported by the pair of unicast terminals respectively; when the communication service is a multicast service, the handover duration is this The maximum value of the switching delay reported by the terminal devices that perform multicast respectively; when the communication service is a broadcast service, the switching delay is the maximum value of the switching delay reported by all terminal devices that perform broadcasting. The maximum value of the BWP switching delay corresponding to the terminal device is determined according to different communication service types, and the maximum switching delay is determined as the first switching duration for BWP switching, to ensure that multiple BWP switching is completed at the same time, and to improve communication quality and reliability.

Optionally, when the first terminal device switches from the first BWP to the second BWP, the communication system may pre-define the first switching duration to be the switching time corresponding to all types of BWP according to the existing types of switching delays of several BWPs The maximum value. At this time, steps S402 and S403 may not be executed.

For example, as shown in Table 1 for the BWP switching delay parameters, in the frequency range 1 and the frequency range 2, the maximum value of the type 1 BWP and type 2 BWP switching delay is 2000us, then the predefined first switching duration can be For 2000us, the terminal device that performs BWP switching can complete the BWP switching within the switching duration of 2000us.

It should be noted that the foregoing method for predefining the first switching duration is only for illustration, and this embodiment of the present application does not limit this.

S404. The first terminal device acquires the first switching duration.

The network device determines the first switching duration according to the supported BWP switching delay type reported by the first terminal device, and then sends the first switching duration to the first terminal device.

Optionally, during the BWP handover process, since the handover delays of different types of BWP are different, in order to ensure the simultaneous handover of multiple BWPs, when the first terminal device does not change within the first handover time period after the start of handover send data.

For example, the first handover duration is 5ms, and the first terminal device takes 2ms to switch from the first BWP of the side link to the second BWP of the side link. In the remaining 3ms, the first terminal device does not send any data. Until the end of the first handover duration, that is, during the first handover duration, the BWPs that are switched simultaneously complete the handover at the same time, avoiding multiple communication terminals caused by BWP handovers and improving communication reliability.

Optionally, when the communication system predefines the first switching duration, this step S404 may not be performed.

S405. The first terminal device obtains BWP switching instruction information. That is, the first terminal device receives switching instruction information from the network device or the second terminal device, where the switching instruction information is used to instruct the first terminal device to switch from the first BWP to the second BWP.

Optionally, when the first terminal device performs sidelink BWP switching, in addition to the configuration information of the BWP before the switching and the configuration information of the BWP after the switching, the switching instruction information of the BWP needs to be obtained before the switching. The switching instruction information is used to instruct the first terminal device to perform BWP switching, for example, switching from the first BWP to the second BWP.

Optionally, when the first terminal device is in a different connection state, the manner of acquiring the handover indication information is different.

For example, when the first terminal device is in a connected state, the handover instruction information is sent by the network device to the first terminal device, and the first terminal device receives the handover instruction information from the network device.

Optionally, when there are multiple terminal devices in the communication system, some of which are outside the network, when the network device sends the handover instruction information to the terminal device through a downlink control signal (download control signal, DCI), because the terminal device is in the network The external terminal device cannot communicate with the network device and cannot receive the switching instruction information. At this time, the handover instruction information may be sent to the terminal device outside the network through the side link communication according to the terminal device in the network. For example, when the first terminal device is outside the network, the first terminal device receives the switching instruction information from the second terminal device. It should be understood that the second terminal device is a terminal device in the network, which is only used as an example here.

For example, as shown in FIG. 5, there are three terminal devices under the network device, namely a first terminal device, a second terminal device, and a third terminal device. The first terminal device is in the network and can receive the switching instruction information sent by the network device through DCI, but the second terminal device and the third terminal device outside the network cannot receive the switching instruction information sent by the network device through DCI, Then, the first terminal device sends the received handover instruction information sent by the network device through DCI to the second terminal device and the third terminal device through sidelink control information (sidelink control signal, SCI). For example, the first terminal device sends switching instruction information to the second terminal device.

Optionally, the switching instruction information may indicate BWP switching of the first terminal device and the second terminal device in unicast, or the switching instruction information may indicate BWP switching of multiple terminal devices in multicast or broadcast, wherein the The multiple terminal devices include the first terminal device.

Optionally, the first terminal device may also receive the handover instruction information within a handover preparation window, and within the handover preparation window, the network device sends the handover instruction information multiple times to enable the multiple terminal devices before the handover begins Both received the switching instruction information.

Optionally, the first terminal device outside the network may receive the handover instruction information within a handover preparation window, and within the handover preparation window, the second terminal device within the network sends the handover instruction information multiple times to make the The first terminal device receives the switching instruction information before starting the switching.

Optionally, the switching instruction information includes configuration information of the switching preparation window, and the configuration information of the switching window includes at least one of the following: configuration information of the duration of the switching preparation window; configuration information of the start time of the switching preparation window; end of the switching preparation window Time configuration information.

It should be understood that the configuration information of the handover preparation window may also be sent before the handover instruction information, which is not limited in this embodiment of the present application. As shown in FIG. 6, the first terminal device works on BWP1, and the handover instruction information instructs the first terminal device to switch from BWP1 to BWP2. In order for the communicating terminal devices to reliably receive the switching instruction information and avoid failing to detect the DCI at the same time, they cannot do BWP switching at the same time. The network device needs to send the DCI message to the terminal device that performs BWP switching multiple times in the network, as shown in Figure 6 5 DCI messages are sent separately in each handover preparation window. The DCI messages sent by the network device multiple times may have the same content or different content, which is not limited in this embodiment of the present application.

Optionally, the handover indication information is also used to indicate at least one of the following information: the time when the handover starts; the time when the handover is completed, or the duration of the BWP handover; and the transmission resource on the second BWP.

The switching instruction information instructs the first terminal device to switch from the first BWP to the second BWP according to the instruction information.

For example, the first terminal device successfully detects the PDCCH corresponding to the RNTI that triggers the BWP switching, and the first terminal device switches from the first BWP corresponding to the connected state to the second BWP corresponding to the connected state.

Optionally, the handover instruction information indicates the time when the handover starts and the time when the handover is completed, that is, when the first terminal device starts BWP handover and when it stops BWP handover. For example, if the switching instruction information indicates that the start time is 1 ms and the switching completion time is 3 ms, the first terminal device starts BWP switching at 1 ms, and the BWP switching ends at 3 ms.

Optionally, the handover instruction information may also indicate the time when the handover starts and the duration of the BWP handover. For example, if the switching instruction information indicates that the BWP switching start time is 1 ms and the switching duration is 3 ms, the first terminal device starts BWP switching at the 1 ms time, and the BWP switching ends after the switching process continues for 3 ms, that is, the BWP switching at the 3 ms time End.

Optionally, the handover instruction information may also indicate the time when the handover is completed and the duration of the BWP handover. For example, if the switching instruction information indicates that the time when the BWP switching is completed is 3 ms and the switching duration is 3 ms, the first terminal device starts the BWP switching at the time of 1 ms, and the BWP switching ends after the switching process continues for 3 ms, that is, the BWP switching at the time of 3 ms End.

Optionally, the switching instruction information is also used to indicate the switching of M BWPs currently activated by the first terminal device, where M is a positive integer greater than 1.

Optionally, the M BWPs include a side link BWP and a cellular link BWP.

The M BWPs may be on the same carrier or different carriers, which is not limited in this embodiment of the present application.

Before the M BWPs are switched simultaneously, the first terminal device reports the following information to the network device: whether to support switching between the cellular link BWP and the side link BWP simultaneously; or whether to support switching between the cellular link BWP and the side simultaneously The total number of downlink BWPs; and/or the number of simultaneous switching of the cellular link BWP and the simultaneous support of the lateral downlink BWP under the condition of supporting simultaneous switching of the switching cellular link BWP and the side link BWP The number of BWPs to be switched; or the switch delay or the type of switch delay and the side link to switch the BWP of the cellular link at the same time under the condition of supporting simultaneous switching of the BWP of the switching cellular link and the BWP of the side link BWP switching delay or switching delay type.

For example, before the M BWPs are switched simultaneously, the first terminal device needs to first report to the network device whether to allow simultaneous switching of the cellular link BWP and the side link BWP. If not, the M BWPs are not performed. Simultaneous switching; if allowed, report the total number of simultaneous switching of the cellular link BWP and the side link BWP, such as N, where N is a positive integer less than or equal to M. The number and type of cellular links BWP and the number and type of the side link BWP in the N simultaneous switched BWPs are reported at the same time, so as to determine the first switching duration and realize the N number including the cellular link BWP and the side link BWP Switch simultaneously.

S406. The first terminal device switches from the first BWP to the second BWP according to the configuration information of the first BWP, the configuration information of the second BWP, and the switching instruction information in the configuration information.

When the first terminal device switches from the first BWP to the second BWP, the configuration information used is only the configuration information of the first BWP before switching and the configuration information of the second BWP after switching. According to the difference in the at least two connection states, the first terminal device switching from the first BWP to the second BWP may include different scenarios.

Optionally, the configuration information of the first BWP and the configuration information of the second BWP in this application may come from the same message, or from different messages, or may come from different parts of the same message. For example, it can be sent to the terminal device through the same SIB or RRC message or pre-configured message, it can be sent to the terminal device through different SIB messages or different RRC messages or different or pre-configured messages, or it can be sent through a Different fields in the SIB message, an RRC message, or a pre-configured message or different parts of the message body are sent to the terminal device, which is not limited in this embodiment of the present application.

Optionally, this step S405 may be that the first terminal device switches from the first BWP to the second according to the configuration information of the first BWP and the configuration information of the second BWP in the configuration information and the pre-configured switching conditions BWP.

Wherein, the pre-configured switching condition is a correspondence between switching of the connection state of the first terminal device and BWP switching.

Optionally, the pre-configured switching conditions may be pre-configured by the system, or pre-defined in the protocol, or may be reported to the network device when the connection state of the first terminal device is switched, and the network device receives the first It is configured after the information reported by a terminal device is not limited in the embodiment of the present application.

The system is pre-configured, which means that the communication-related parameters or configuration information are pre-configured into the communication terminal device in advance. This method can usually be used in scenarios beyond network coverage, because the terminal device cannot connect to the network device at this time, and the configuration information can only be obtained in this way.

Optionally, the information can be pre-configured by writing to the cache of the terminal device in advance.

Optionally, the pre-configured switching condition includes: in a case where the first terminal device switches from a connected state to an idle state, the first terminal device switches from one BWP of at least one BWP corresponding to the connected state to the idle state A BWP corresponding to the state; or when the first terminal device switches from the idle state to the connected state, the first terminal device switches from a BWP corresponding to the idle state to one of at least one BWP corresponding to the connected state BWP; or in the case where the first terminal device is switched from the connected state to outside the network, the first terminal device is switched from a BWP corresponding to the connected state to one BWP of at least one BWP corresponding to the outside of the network; or When the first terminal device switches from the outside of the network to the connected state, the first terminal device switches from a BWP corresponding to the outside of the network to one BWP of at least one BWP corresponding to the connected state; or at the first terminal When the device switches from outside the network to the idle state, the first terminal device switches from a BWP corresponding to the outside of the network to a BWP corresponding to the idle state; or when the first terminal device switches from the idle state to outside the network In this case, the first terminal device switches from a BWP corresponding to the idle state to one BWP of at least one BWP corresponding to the outside of the network.

Optionally, for all scenes of BWP switching corresponding to existing terminal device state switching, the communication system may pre-configure corresponding BWP switching conditions according to different state switching of the terminal device. For example, the correspondence between the pre-configured switching conditions shown in Table 2 and the state switching of the first terminal device is predefined.

Table 2 Correspondence between pre-configured switching conditions and state switching of the first terminal device

第一终端设备连接状态切换Switching the connection state of the first terminal device	标识Logo	预配置切换条件Pre-configured switching conditions
连接态切换到空闲态Connect to idle state	11	条件1 Condition 1
空闲态切换到连接态Switch from idle state to connected state	22	条件2 Condition 2
连接态切换到网络外Switching the connection state out of the network	33	条件3 Condition 3
网络外切换到连接态Switch to connected state outside the network	44	条件4 Condition 4
网络外切换到空闲态Switch to idle state outside the network	55	条件5Condition 5
空闲态切换到网络外Switching out of the network in idle state	66	条件6Condition 6

As shown in Table 2, there is a one-to-one correspondence between connection state switching, identification and pre-configured switching conditions of the first terminal device. The pre-configuration switching condition 1 to the pre-configuration switching condition 6 sequentially correspond to the pre-configuration conditions listed above. For example, the pre-configured switching condition 1 is that the first terminal device switches from one of the at least one BWP corresponding to the connected state to a BWP corresponding to the idle state, and the pre-configured condition 2 is that the first terminal device corresponds to the idle state from the idle state Switch a BWP to a BWP of at least one BWP corresponding to the connected state, and so on, and pre-configured switching condition 6 is that the first terminal device switches from a BWP corresponding to the idle state to at least one BWP corresponding to the outside of the network One of the BWP. When the connection state of the first terminal device and the network device changes, the identification information corresponding to the state switch is fed back to the system according to the different state changes, and according to the identification information, the pre-configured switching conditions are determined by looking up Table 2. For example, when the first terminal device switches from the connected state to the idle state, the identification information 1 is fed back to the system. According to the correspondence between the pre-defined pre-configured switching conditions and the state switching of the first terminal device, the system determines the corresponding pre-configured switching conditions as condition 1 according to the identification information, then the first terminal device according to the corresponding pre-configured switching conditions, from One BWP of the at least one BWP corresponding to the connected state is switched to a BWP corresponding to the idle state.

For example, the first terminal device starts random access from the idle state in the serving cell. If the random access process is successful, the connection state between the first terminal device and the network device changes from the idle state to the connected state. The terminal device switches from the first BWP corresponding to the idle state to the second BWP corresponding to the connected state. If the random access process fails, the connection state between the first terminal device and the network device is still in the idle state, and the first terminal device still works on the first BWP corresponding to the idle state, and BWP switching is not performed.

The above content mainly describes several scenarios where the first terminal device performs BWP switching. In actual work, the scenario where the first terminal device performs BWP switching may include at least one of the above.

In addition, the terminal devices in the same connection state can communicate normally, for example, communication between 10 terminal devices in a connected state or communication between 10 terminal devices in an idle state. However, the communication between the terminal devices in different connection states will be affected, for example, the information sent by the terminal device in the connected state cannot be received by the terminal device in the idle state.

In order to improve the communication reliability between terminal devices in different connection states, when terminal device devices in different connection states communicate with each other, the configuration information may also include the configuration information and may also include the side of the terminal device in different connection states Time-frequency resources of the BWP of the link.

Optionally, the configuration information may also include time-frequency resources of the side link BWP of the terminal device in different connection states. Among them, the transmission time-frequency resource and the reception time-frequency resource of the terminal device are located in the side link BWP. In order to ensure communication reliability, the reception time-frequency resource of the side link BWP for the terminal device in the connected state is A subset of the reception time-frequency resources of the side link BWP of the terminal device in the idle state; and/or the reception time-frequency resources of the side link BWP of the terminal device outside the network are used in the idle state A subset of the received time-frequency resources of the side link BWP of the terminal device; and/or the received time-frequency resources of the side link BWP of the terminal device in the connected state are the A subset of the side-link BWP reception time-frequency resources of the terminal device; and/or the side-link BWP reception time-frequency resource of the terminal device in the idle state is the terminal device used outside the network The subset of BWP received time-frequency resources.

Optionally, the transmission time-frequency resource for the side link BWP of the terminal device in the idle state is the same as the transmission time-frequency resource for the connected state; and/or, the side of the terminal device in the idle state The transmission time-frequency resource of the downlink BWP is the same as the transmission time-frequency resource used outside the network; and/or the transmission time-frequency resource of the side link BWP used for the terminal device outside the network is the same as that used in the connected state. The transmission time-frequency resource is the same; and/or, the transmission time-frequency resource used for the side link BWP of the terminal device outside the network is the same as the transmission time-frequency resource used in the idle state.

For example, there are 10 terminal devices in the connected state and 10 terminal devices in the idle state in the current communication system. When these 10 terminal devices in the connected state and 10 terminal devices in the idle state When communicating, the side link BWP in the connected state sends information on its corresponding transmission time-frequency resource. In order to ensure the normal communication, the configuration information configures the 10 sides used for the connected terminal device The reception time-frequency resource of the downlink BWP is 1MHz, and the 10 side-link BWP reception time-frequency resources of the terminal device in the idle state are 2MHz, that is, the side-link of the terminal device in the idle state The BWP reception time-frequency resource may include a side link BWP reception time-frequency resource for the terminal device in the connected state, so that the information sent by the terminal device in the connected state can also be used by the terminal device in the idle state Received, it can realize normal communication between terminal devices in different connection states.

Steps S401 to S406 describe in detail the process of the first terminal device switching from the first BWP to the second BWP. After the BWP switching is completed, in order to further ensure that all BWP switching is completed at the same time, you can check whether all BWPs have completed the switching after the BWP switching is completed.

S407: The first terminal device receives the first indication information sent by the network device.

After the first terminal device switches from the first BWP to the second BWP, the network device sends first indication information to the first terminal device, where the first indication information is used by the first terminal device to determine the side link first BWP switching was successful.

Optionally, the first indication information may include at least one of the following: indication information of the first BWP; indication information of the second BWP; and time interval information, wherein the time interval information indicates that the The interval between the start time or completion time of the handover of a BWP to the second BWP of the side link and the transmission time of the first indication information

Optionally, the first indication information may be sent on the BWP before switching, or may be sent on the BWP after switching. When the first indication information is sent on the BWP before switching, if the terminal device receives the first indication information, it indicates that the terminal device has not successfully switched. Similarly, when the first indication information is sent on the switched BWP, if the terminal device does not receive the first indication information, it indicates that the terminal device has not successfully switched. In this way, it can be determined whether the terminal device is successfully switched.

Optionally, step S408 is also included, and the first terminal device sends second indication information to the network device.

The second indication information is used to determine that the first BWP handover is successful.

Optionally, the second indication information includes any one of the following: indication information of the first BWP; indication information of the second BWP; indication of successful BWP handover.

For example, when the indication of the successful BWP switching in the second indication information is 1, it indicates that the first BWP switching is successful; or when the indication of the successful BWP switching is T, it indicates that the first BWP switching is successful. This embodiment of the present application The comparison is not limited.

Optionally, when multiple BWPs are activated at the same time, if any one of the activated BWPs is switching, it may cause service interruption to other activated BWPs that are working simultaneously. In order to reduce the mutual influence of multiple simultaneously activated BWPs during the switching process, an embodiment of the present application proposes a method for simultaneous switching of multiple BWPs. FIG. 7 is a schematic flowchart of a communication method 700 provided by an embodiment of the present application Figure.

S710. The first terminal device obtains first switching instruction information sent by the network device, where the first switching instruction information is used to indicate the currently activated switching of M BWPs, where M is a positive integer greater than 1.

It should be understood that the currently activated M BWP link types may be the same or different, for example, may be M side links, M cellular links, or M side links and cellular links This is not limited in the embodiments of the present application.

Optionally, the currently activated M BWPs may be on the same carrier or different carriers, which is not limited in this embodiment of the present application.

S720. The first terminal device performs BWP switching according to the first switching instruction information.

Before the currently activated M BWPs are switched simultaneously, the first terminal device reports the following information to the network device: whether to support simultaneous switching of the cellular link BWP and the side link BWP; or to support simultaneous switching of the cellular link BWP and The total number of side link BWPs; and/or the number of simultaneous switching of the cellular link BWP and the side link BWP under the condition of supporting simultaneous switching of the switching cellular link BWP and the side link BWP The number of BWPs that are switched simultaneously in the medium; or the switch delay or the type of switch delay and the side row that support the switch of the cellular link BWP at the same time under the condition of supporting the simultaneous switching of the switching cellular link BWP and the side link BWP Switching delay or type of switching delay for link BWP.

For example, before the currently activated M BWPs are switched simultaneously, the first terminal device needs to first report to the network device whether to allow simultaneous switching of the cellular link BWP and the side link BWP. If not, the M MWPs are not performed. Simultaneous BWP handover; if allowed, report the total number of BWP and sidelink BWP that support simultaneous handover of the cellular link, for example, N, where N is a positive integer less than or equal to M. The number and type of cellular links BWP and the number and type of the side link BWP in the N simultaneous switched BWPs are reported at the same time, so as to determine the first switching duration and realize the N number including the cellular link BWP and the side link BWP Switch simultaneously.

In addition, the M BWPs may be on one carrier or on multiple carriers, which is not limited in this embodiment of the present application.

Further, before switching the BWP of the side link according to the first switching instruction information, the terminal device reports the following information to the network device: whether it is supported to switch the BWP of the cellular link and the BWP of the side link at the same time; or The total number of BWPs supporting the simultaneous switching of the cellular link and the BWP of the side link; and/or under the conditions of supporting the simultaneous switching of the BWP of the changing cellular link and the BWP of the side link, supporting the cellular link The number of simultaneous BWP handovers and the number of BWPs simultaneously supported in the BWP supporting the side link; or the handover delay or handover delay type supporting the simultaneous handover of the BWP of the cellular link and the BWP of the side link; Or support multiple BWP switch delays or switch delay types for the same link. Whether it supports simultaneous activation of more than one BWP. Wherein, the more than one BWP may be multiple BWPs of one type or multiple types of BWP. Whether it supports simultaneous switching of more than one BWP; or supports the switching delay or type of switching delay between the BWP of the cellular link and the BWP of the side link; or supports the switching delay of multiple BWPs of the same link or Switch the delay type.

For example, when the reported information is 1, the multiple BWPs indicating switching are of the same type, and when the reported information is 0, the multiple BWPs indicating switching are of multiple types; or, the reported information When it is 0, the multiple BWPs indicating the handover are of the same type, and when the reported information is 1, the multiple BWPs indicating the handover are of multiple types, which is not limited in the embodiments of the present application.

The reported information may include the number of BWPs that support simultaneous activation. For example, when the reported information indicates that multiple BWPs of the same type are activated at the same time, the reported information may also include the number of simultaneous activations of the same type of BWP; when the reported information indicates that multiple types of BWP are activated simultaneously In the case of multiple BWPs, the reported information may also include the number of simultaneous activations of the same type of BWP, where, when multiple types include cellular link BWP and side link BWP, the number is specifically The number of BWP of the cellular link and the number of BWP of the side link.

The first switching instruction information further includes switching duration information of multiple activated BWPs. Since the switching duration of the BWP is related to the types of the multiple BWPs, before the BWP switching is performed, the terminal device also needs to report the type of the BWP that supports simultaneous activation to the serving base station, and determine the switching duration of the BWP according to the BWP type.

For example, when the multiple BWPs are three BWPs, namely BWP1, BWP2, and BWP3, BWP1 and BWP2 are type1, and BWP3 is type2. When these 3 BWPs are switched simultaneously, according to Table 1, the switching delay of BWP1 and BWP2 is 600us, and the switching delay of BWP3 is 2000us. Assuming that the switching delay of 600 W for BWP1 and BWP2 is the switching time for switching BWP1, BWP2, and BWP3 at the same time, during the switching process, when the switching of BWP1 and BWP2 is completed, because the switching delay of BWP3 is 2000us greater than 600us, BWP3 also If the switch is not completed, service interruption will be generated for BWP1 and BWP2 that have been switched over. Therefore, when instructing the switching duration, the maximum switching delay among the three BWPs should be selected as the switching duration of simultaneous switching, that is, the switching delay of 2000us for BWP3 is selected as the switching duration of BWP1, BWP2, and BWP3 simultaneous switching.

Further, when the communication service is a unicast service, the switching duration is the maximum value of the switching delay reported by the pair of unicast terminals respectively; when the communication service is a multicast service, the switching duration is grouped for this group The maximum switching delay reported by the broadcast terminal devices respectively; when the communication service is a broadcast service, the switching delay is the maximum switching delay reported by all broadcast terminal devices.

Determine the maximum value of the BWP switching delay corresponding to the terminal device according to different communication service types, and determine the maximum value as the switching duration of the side link, to ensure that multiple BWPs activated simultaneously can be switched simultaneously, reducing the number of simultaneous activations. The interruption caused by each BWP during the handover process improves the communication quality and reliability.

Optionally, the first handover indication information includes any one or more combinations of SIB, RRC, MAC CE or DCI to carry, which is not limited in the embodiment of the present application.

In this embodiment of the present application, after receiving the first switching instruction information, multiple BWPs need to be switched at the same time. In order to accurately achieve multiple BWP switching, the first switching instruction information needs to include the switching of each BWP in the multiple BWPs The indication information before and the BWP indication information after switching enable the multiple BWPs to complete the switching accurately at the same time.

Taking the simultaneous switching of two BWPs (BWP1 and BWP2) as an example, the first switching indication information includes indication information before BWP1 switching. The indication information may be BWP1, and the corresponding indication information after switching is BWP3. Accordingly, BWP2 The corresponding instruction information before switching is BWP2, and the instruction information after switching is BWP4. After receiving the first instruction information, BWP1 switches to BWP3 and BWP2 switches to BWP4.

If the multiple BWPs work on a shared carrier in frequency or time division, the indication information of the pre-handover BWP included in the first handover indication information may be the frequency or time at which the multiple BWPs respectively work, and the corresponding handover The indication information of the following BWP is the working frequency or time of the target BWP switched to.

It should be understood that the indication information of the BWP before handover and the indication information of the BWP after handover included in the first handover instruction information may also be other information with identification, which is not limited in this embodiment of the present application.

In the embodiment of the present application, the first terminal device simultaneously performs switching of the currently activated M BWPs according to the acquired first switching instruction information, which reduces the number of other activated states during switching of a part of BWPs among multiple BWPs working simultaneously. Interruption caused by BWP improves communication reliability.

FIG. 8 shows a schematic flowchart of a communication method 800 provided by an embodiment of the present application.

S810. The first terminal device acquires configuration information of a timer corresponding to the first bandwidth part BWP of the side link.

The network device sends the configuration information of the timer corresponding to the first BWP of the side link to the first terminal device.

S820. The first terminal device manages the timer according to the configuration information of the timer.

When the timer expires, the first BWP of the side link is switched to the second BWP of the side link. The first BWP of the side link is the BWP of the currently activated side link. The second BWP is the BWP of the side link of the terminal device in the idle state or the BWP used for the side link outside the network.

It should be noted that the expiration of the timer means that the value of the timer exceeds the defined duration of the timer, where the duration of the timer may be pre-defined, signaling configured or pre-configured, embodiments of the present application There is no restriction on this.

Optionally, when the timer expires, if the terminal device is in the connected state, the terminal device sends to the network device indication information of the timer expiration or indication information of the terminal device side link BWP switching. When the network device receives the indication information, the side link first BWP is switched to the side link second BWP.

In the above technical solution, the terminal device at the receiving end manages the timer according to the configuration information of the timer by acquiring the configuration information of the timer. Specifically, managing the timer according to the timer configuration information includes timer start/restart, timer step increment by one, or timer expiration. When the timer expires, the BWP of the side link is switched. The influence of the disconnection of the terminal device of the receiving end on the communication quality during the communication is reduced, and the communication reliability is improved.

Optionally, the configuration information of the timer may include the step size of the timer and/or the duration of the timer. Specifically, the step size of the timer and/or the duration of the timer are associated with at least one of the following parameters: the service type of the side link; the quality of service (QoS) parameter of the side link; the side Subcarrier spacing (SCS) value of the link; the resource pool used by the side link; the waveform type of the side link. When any of the above parameters are different, the corresponding timer step size and/or timer duration are different.

For example, when the QoS requirements are high (for example, low latency requirements) or the SCS is larger (for example, 60 kHz), the timer step size and/or period setting are smaller, when the QoS requirements are low or the SCS is smaller, The timer step and/or period are set larger.

Optionally, the time of the timer step may be included in the transmission resources of the side link.

It should be noted that the state of the timer also includes timer running, timer start/restart.

In the communication process, when the terminal device meets the first condition, the timer corresponding to the first BWP of the side link starts or restarts. The first condition is any one of the following conditions: when the terminal device is in a connected state and successfully detects the DCI of the scheduling cellular link sent by the serving base station; when the terminal device successfully detects the scheduling sent by the first terminal device When the downlink control information of the side link is DCI; when the terminal device sends the buffer status of the side link, the scheduling request of the side link, and the hybrid automatic retransmission of the side link to the serving base station or the first terminal device once ( hybrid (automatic repeat request, HARQ) response message or channel state information CSI feedback information of the side link; when the terminal device successfully detects the SCI of the side link.

Optionally, when the terminal device successfully receives the above control information, it may send an acknowledgement (ACK) information response message to the network device, and the timer is started or restarted.

In some alternative embodiments, optionally, the ACK information may be one or more. For example, in a unicast field, the network device receives one ACK message from the terminal device; it may be that the network device receives multiple ACK messages from other terminal devices in a multicast or broadcast scenario.

It should be understood that when the terminal device satisfies any one of the first conditions above, if the timer is not started, the timer is started; if the timer is started and has not expired, the timer restarts.

In the embodiment of the present application, when the terminal device successfully receives the above control information, it indicates that the current communication between the terminal device and the network device is normal, and the understanding about the scheduling information between the network device and the terminal device is consistent.

Correspondingly, when the timer is running and the timer does not detect any of the following information within the corresponding step time, the value of the timer increases: downlink control of the scheduled cellular link sent by the network device When DCI information is used; when the downlink control information DCI for scheduling the side link sent by the network device is sent; when the ACK response information of the side link is used; when the side control information SCI of the side link is used.

It should be noted that the ACK response message that does not detect the side link may be DCI that does not detect the downlink control information of the scheduled cellular link sent by the network device, or the downlink control information of the scheduled side link sent by the access network During DCI, any one of the side control information SCI of the side link, the side link sends negative acknowledgement (negative acknowledgement, NACK) NACK response information, and the timer value increases. It may also be that the terminal device does not detect the ACK response message and the NACK response message, the terminal device sends discontinuous transmission (DTX) information to the network device, and the timer value increases.

Optionally, the NACK information may be one or more. For example, in a unicast field, the first terminal device receives one NACK message of the terminal device; it may be that the first terminal device receives multiple NACK messages in a multicast or broadcast scenario.

In the embodiment of the present application, when the terminal device successfully receives the above control information, it indicates that the current communication between the terminal device and the access network is abnormal, and the understanding about the scheduling information between the terminal device and the network device is inconsistent and may be in the network One of the terminal devices is offline or the BWP of the terminal device and the network device is different; or the terminal device is outside the network.

It should be noted that the ACK information or NACK information may be ACK or NACK feedback of hybrid automatic repeat HARQ, ACK or NACK feedback of automatic repeat ARQ, and so on.

In the above technical solution, whether to perform BWP switching of the side link can be determined according to the state of the timer.

When this timer expires, the BWP switch of the side link needs to be performed. Wherein, the BWP switching of the side link may be that the terminal device switches from the first BWP of the side link in the connected state to the second BWP2 of the side link in the idle state; it may be the side of the terminal device from the idle state The second BWP of the link is switched to the third BWP of the side link in the out-of-network state; the terminal device may also switch from the first BWP of the side link in the connected state to the side link in the out-of-network state. Three BWP.

When the timer expires, the terminal device in the connected state reports to the first terminal device indication information that the timer expires or indication information that the terminal device is to switch the BWP of the side link.

Optionally, when the timer expires, it indicates that the terminal device has not received the corresponding scheduling signaling, and the communication may have been interrupted, then the terminal device switches from the current side link BWP to a default BWP and restarts Access to the communication system to achieve transmission. The default BWP is the BWP of the side link in the idle state.

In addition, if the first terminal device has been sending data packets to the terminal device, but has not received any information and has not received it (such as ACK or NACK information), it indicates that there is a problem with the communication between the first terminal device and the terminal device, and needs to The adjustment is performed, and at this time, the value of the first timer increases.

The communication method proposed in this application has been described in detail above with reference to FIGS. 4 to 8. The communication device proposed in this application will be described below.

Referring to FIG. 9, FIG. 9 is a schematic diagram of the communication device 10 provided by the present application. As shown in FIG. 9, the communication device 10 includes a transceiver unit 910 and a processing unit 920.

In some possible implementations, the communication apparatus 10 may be the first terminal device corresponding to the method 400.

The transceiving unit 910 is configured to execute the first terminal device acquiring configuration information of the bandwidth part BWP corresponding to at least two connection states sent by the network device. The connection state is step S401 of the connection state between the terminal device and the network device. The at least two connection states include an idle state, a connection state, or off-network, and the BWPs corresponding to the at least two connection states are used for side links.

Wherein, the first BWP and the second BWP belong to BWP corresponding to at least two connection states respectively.

Among them, the transceiver unit 910 in the device 10 includes a receiving unit and a sending unit, and has both receiving and sending functions. It is used to perform the steps of acquiring, receiving, and sending information from other devices by the first terminal device in the method embodiment. Optionally, the transceiving unit 910 is further configured to perform a step S402 of sending the BWP handover delay type supported by the first terminal device to the network device.

Different BWP handover delay types correspond to different BWP handover delays. In order to achieve simultaneous BWP handover of the terminal device communicating, the BWP handover delay type supported by the first terminal device should be sent to the network device before the first terminal device handover , Used to determine the switching duration.

Optionally, the transceiving unit 910 is further configured to perform step S404 where the first terminal device receives the first handover duration sent by the network device.

The first switching duration is the maximum value of the switching delay corresponding to the BWP switching delay type supported by the first terminal device, so as to ensure that terminal devices communicating with each other can complete BWP switching at the same time. Wherein, the first terminal device does not send data within the time of the first handover duration after the start of handover until the end of the first handover duration.

Optionally, the transceiving unit 910 is further configured to perform step S405 where the first terminal device acquires the switching instruction information. The switching instruction information is used to instruct the first terminal device to switch from the first BWP to the second BWP.

For example, when the first terminal device is in a connected state, the handover instruction information is sent by the network device to the first terminal device, and the first terminal device receives the handover instruction information from the network device. When the first terminal device is outside the network, the first terminal device cannot receive the information sent by the network device, and the first terminal device outside the network receives the switching instruction information from the second terminal device. It should be understood that the second terminal device is a terminal device in the network, which is only used as an example here.

Optionally, the transceiving unit 910 is further configured to perform step S407 where the first terminal device receives the first indication information from the network device.

Optionally, the transceiving unit 910 is further configured to perform step S408 where the first terminal device sends second indication information to the network device.

The first indication information and the second indication information are indication information used to determine that the first terminal device is successfully switched after the first terminal device switches from the first BWP to the second BWP.

Optionally, when the BWPs of the M first terminal devices are activated at the same time, the transceiver unit 910 is also used to send the following information to the network device: whether to support switching between the cellular link BWP and the side link BWP simultaneously; or to support simultaneous The total number of handovers of the cellular link BWP and the side link BWP; and/or the number of simultaneous handovers of the cellular link BWP and The number of BWPs supporting simultaneous handover in the BWP of the side link; or the switch delay or handover of simultaneous switching of the BWP of the cellular link under the condition of supporting simultaneous switching of the switching cellular link BWP and the side link BWP The delay type and the switching delay or the switching delay type of the BWP of the side link.

The processing unit 920 executes steps internally implemented or processed in the first terminal device in the method embodiment. For example, the processing unit 920 is configured to perform step S406 of switching the first terminal device from the first BWP to the second BWP according to the configuration information of the first BWP, the configuration information of the second BWP, and the switching instruction information in the configuration information.

Optionally, the processing unit is further configured to perform a step of the first terminal device switching from the first BWP to the second BWP according to the configuration information of the first BWP, the configuration information of the second BWP, and the pre-configured switching conditions in the configuration information.

Optionally, the configuration information of the first BWP and the configuration information of the second BWP in this application may come from the same message, or from different messages, or may come from different parts of the same message. For example, it can be sent to the terminal device through the same SIB or RRC message or pre-configured message, it can be sent to the terminal device through different SIB messages or different RRC messages or different or pre-configured messages, or it can be sent through a The SIB message or an RRC message or a pre-configured message in different fields or different parts of the message body are sent to the terminal device, this application does not limit this.

In some possible implementations, the communication apparatus 10 may be the first terminal device corresponding to the method 700.

Optionally, the transceiving unit 910 is configured to perform step S710 where the first terminal device receives the first handover instruction information sent by the network device.

The first switching instruction information is used to indicate the currently activated switching of M BWPs, where M is a positive integer greater than 1.

Optionally, the processing unit 920 is configured to perform a step S720 of the first terminal device performing M BWP handovers according to the first handover instruction information.

In some possible implementations, the communication apparatus 10 may be the first terminal device corresponding to the method 800.

Optionally, the transceiving unit 910 is configured to perform step S810 in which the first terminal device receives timer configuration information sent by the network device.

Optionally, the processing unit 920 is configured to execute step S820 in which the first terminal device manages the timer according to the configuration information of the timer.

10 is a schematic structural diagram of a communication device 10 provided by an embodiment of the present application. The communication device 10 may be a first terminal device 20, which performs the function of the first terminal device in the above method embodiment.

As shown in the figure, the first terminal device 20 includes a processor 210 and a transceiver 220. Optionally, the first terminal device 20 further includes a memory 230. Among them, the processor 210, the transceiver 220 and the memory 230 can communicate with each other through an internal connection path to transfer control and/or data signals. The memory 230 is used to store a computer program, and the processor 210 is used from the memory 230 Call and run the computer program to control the transceiver 220 to send and receive signals. Optionally, the first terminal device 20 may further include an antenna 240 for sending uplink data or uplink control signaling output by the transceiver 220 through a wireless signal.

The above processor 210 and the memory 230 may be combined into one processing device. The processor 210 is used to execute the program code stored in the memory 230 to realize the above function. During specific implementation, the memory 230 may also be integrated in the processor 210 or independent of the processor 210. The processor 210 may correspond to the processing unit of the communication device 10.

The transceiver 220 described above may correspond to the transceiver unit 910 in FIG. 9 and may also be referred to as a communication unit. The transceiver 220 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). Among them, the receiver is used to receive signals, and the transmitter is used to transmit signals.

It should be understood that the terminal device 20 shown in FIG. 10 can implement various processes involving the first terminal device in the method embodiments shown in FIGS. 4, 7, and 8. The operations and/or functions of each module in the first terminal device 20 are respectively for implementing the corresponding processes in the above method embodiments. For details, please refer to the description in the above method embodiments. In order to avoid repetition, the detailed description is appropriately omitted here.

The above-mentioned processor 210 may be used to perform the actions described in the foregoing method embodiments and implemented internally by the first terminal device, and the transceiver 220 may be used to perform the first terminal device described in the foregoing method embodiment to send to or from the network device Action received by the network device. For details, please refer to the description in the foregoing method embodiment, and no more details are provided here.

Optionally, the first terminal device 20 may further include a power supply 250, which is used to provide power to various devices or circuits in the terminal device.

In addition, in order to make the function of the first terminal device more perfect, the first terminal device 20 may further include one or more of an input unit 260, a display unit 270, an audio circuit 280, a camera 290, a sensor 2100, etc., The audio circuit may further include a speaker 282, a microphone 284, and the like.

It should be noted that the communication device 10 may also be the second terminal device or the third terminal device in any of the foregoing method embodiments, to implement the steps of the second terminal device or the third terminal device in any of the foregoing implementation manners Or function.

Referring to FIG. 11, FIG. 11 is a schematic diagram of the communication device 30 proposed by the present application. As shown in FIG. 11, the device 30 includes a processing unit 1110 and a transceiver unit 1120.

In some possible implementations, the communication device 30 may be a network device corresponding to the method 400.

Optionally, the transceiver unit 1120 is configured to perform step S401 in which the network device sends configuration information of the bandwidth part BWP corresponding to at least two connection states to the first terminal device.

Among them, the transceiver unit 1120 in the device 30 includes a receiving unit and a sending unit, and has both receiving and sending functions. It is used to perform the steps of obtaining, receiving, and sending information from other devices by the network device in the method embodiment.

Optionally, the transceiving unit 1120 is configured to perform a step S402 where the network device receives the BWP handover delay type supported by the first terminal and sent by the first terminal device.

Different BWP handover delay types correspond to different BWP handover delays. In order to achieve simultaneous BWP handover of the communication terminal device, the network device should receive the first terminal device's support of the first terminal device before the first terminal device switches. BWP handover delay type, used to determine the handover duration.

Optionally, the transceiver unit 1120 is further configured to perform step S404 where the network device sends the first switching duration to the first terminal device.

Optionally, the transceiving unit 1120 is further configured to perform step S405 in which the network device sends switching instruction information to the first terminal device. The switching instruction information is used to instruct the first terminal device to switch from the first BWP to the second BWP.

Optionally, the transceiving unit 1120 is further configured to send a pre-configured switching condition to the first terminal device, where the pre-configured switching condition is a correspondence between switching of the connection state of the first terminal device and BWP switching.

Optionally, the transceiver unit 1120 is further configured to perform step S407 in which the network device sends the first indication information to the first terminal device.

Optionally, the transceiving unit 1120 is further configured to perform step S408 where the network device receives the second indication information sent by the first terminal device.

Optionally, when the BWPs of M first terminal devices are activated at the same time, the transceiver unit 1120 is further configured to receive the following information sent by the first terminal device: whether it is supported to switch the cellular link BWP and the side link BWP at the same time; Or support the total number of simultaneous switching of the cellular link BWP and the side link BWP; and/or support the simultaneous switching of the cellular link BWP and the side link BWP under the condition of supporting simultaneous switching of the switching cellular link BWP and the side link BWP The number of handovers and the number of BWPs supporting simultaneous handover in the BWP of the side link; or when the handover of the cellular link BWP is supported under the condition of supporting simultaneous switching of the switching cellular link BWP and the side link BWP Delay or handover delay type and the handover delay or handover delay type of the side link BWP.

The processing unit 1110 executes steps internally implemented or processed by the network device in the method embodiment.

Optionally, the processing unit 1110 is configured to determine configuration information of the bandwidth part BWP corresponding to at least two connection states of the first terminal device, the connection state being a connection state between the terminal device and the network device, the at least two connection states Including the idle state, the connected state, or outside the network, the BWPs corresponding to the at least two connected states are used for the side link.

Optionally, the processing unit 1110 is further configured to perform a step S403 where the network device determines the first switching duration according to the received BWP switching delay type supported by the first terminal device and sent by the first terminal device, where the first switching duration It is the maximum value of the BWP switching delay corresponding to the type of BWP switching delay supported by a pair of terminal devices or a group of terminal devices.

In some possible implementation manners, the communication apparatus 30 may be a network device corresponding to the method 700.

Optionally, the transceiving unit 1120 is configured to perform step S710 in which the network device sends first switching instruction information to the first terminal device.

Optionally, the processing unit 1110 is configured to perform a step in which the network device determines that the first terminal device determines the first handover instruction information.

In some possible implementations, the communication device 30 may be a network device corresponding to the method 800.

Optionally, the transceiver unit 1120 is configured to perform step S810 in which the network device sends the configuration information of the timer to the first terminal device.

Referring to FIG. 12, FIG. 12 is a schematic structural diagram of a network device 40 applicable to an embodiment of the present application, and may be used to implement the functions of the network device in the above-described communication method.

The network device 40 may include one or more radio frequency units, such as a remote radio unit (RRU) 401 and one or more baseband units (BBU). The baseband unit may also be referred to as a digital unit (DU) 402. The RRU 401 can be called a transceiver unit, which corresponds to the transceiver unit 1120 in FIG. 11. Optionally, the transceiver unit 401 may also be called a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 4011 and a radio frequency unit 4012. Optionally, the transceiving unit 1120 may include a receiving unit and a transmitting unit, the receiving unit may correspond to a receiver (or receiver, receiving circuit), and the transmitting unit may correspond to a transmitter (or transmitter, transmitting circuit). The RRU 401 part is mainly used for the transmission and reception of radio frequency signals and the conversion of radio frequency signals and baseband signals, for example, for sending configuration information to the first terminal device. The BBU 402 is mainly used for baseband processing and control of base stations. The RRU 401 and BBU 402 may be physically set together, or may be physically separated, that is, distributed base stations.

The BBU 402 is the control center of the network device, and may also be called a processing unit, which may correspond to the processing unit 1110 in FIG. 11 and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spread spectrum. For example, the BBU (processing unit) 402 may be used to control the network device 40 to perform the operation flow on the network device in the above method embodiment, for example, to determine the first switching duration.

In an example, the BBU 402 may be composed of one or more boards, and multiple boards may jointly support a wireless access network of a single access standard (eg, LTE system, or 5G system), or may support different Access standard wireless access network. The BBU 402 also includes a memory 4021 and a processor 4022. The memory 4021 is used to store necessary instructions and data. For example, the memory 4021 stores the codebook and the like in the above embodiment. The processor 4022 is used to control the base station to perform necessary actions, for example, to control the network device to execute the operation flow on the network device in the above method embodiment. The memory 4021 and the processor 4022 can serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It is also possible that multiple boards share the same memory and processor. In addition, each board can also be provided with necessary circuits.

It should be understood that the network device 40 shown in FIG. 12 can implement the network device functions involved in the method embodiments of FIGS. 4, 7, and 8. The operations and/or functions of each unit in the network device 40 are respectively for implementing the corresponding processes executed by the network device in the method embodiment of the present application. To avoid repetition, detailed description is omitted here as appropriate. The structure of the network device illustrated in FIG. 12 is only one possible form, and should not constitute any limitation to the embodiments of the present application. This application does not exclude the possibility of other forms of network equipment structures that may appear in the future.

An embodiment of the present application further provides a communication system, which includes the foregoing network device and one or more terminal devices.

The present application also provides a computer-readable storage medium, the computer-readable storage medium has instructions stored therein, and when the instructions run on the computer, the computer executes the method shown in FIG. 4, FIG. 7 and FIG. 8 Steps performed by the first terminal device in

The present application also provides a computer-readable storage medium, the computer-readable storage medium has instructions stored therein, and when the instructions run on the computer, the computer executes the method shown in FIG. 4, FIG. 7 and FIG. 8 The steps performed by the network device in China.

The present application also provides a computer program product containing instructions, which, when the computer program product runs on a computer, causes the computer to perform the steps performed by the first terminal device in the methods shown in FIGS. 4, 7, and 8. .

The present application also provides a computer program product containing instructions. When the computer program product runs on a computer, the computer is allowed to perform various steps performed by the network device in the methods shown in FIGS. 4, 7, and 8.

The present application also provides a chip, including a processor. The processor is used to read and run the computer program stored in the memory to perform the corresponding operation and/or process performed by the first terminal device in the communication method provided by the present application. Optionally, the chip further includes a memory, the memory and the processor are connected to the memory through a circuit or a wire, and the processor is used to read and execute the computer program in the memory. Further optionally, the chip further includes a communication interface, and the processor is connected to the communication interface. The communication interface is used to receive data and/or information that needs to be processed, and the processor obtains the data and/or information from the communication interface and processes the data and/or information. The communication interface may be an input-output interface.

The present application also provides a chip, including a processor. The processor is used to call and run the computer program stored in the memory to perform the corresponding operation and/or process performed by the network device in the communication method provided by the present application. Optionally, the chip further includes a memory, the memory and the processor are connected to the memory through a circuit or a wire, and the processor is used to read and execute the computer program in the memory. Further optionally, the chip further includes a communication interface, and the processor is connected to the communication interface. The communication interface is used to receive data and/or information that needs to be processed, and the processor obtains the data and/or information from the communication interface and processes the data and/or information. The communication interface may be an input-output interface.

In the above embodiments, the processor may be a central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more used to control the technology of the present application Integrated circuits for program execution. For example, the processor may be a digital signal processor device, a microprocessor device, an analog-to-digital converter, a digital-to-analog converter, or the like. The processor may allocate the functions of control and signal processing of the terminal device or network device among these devices according to their respective functions. In addition, the processor may have a function of operating one or more software programs, and the software programs may be stored in the memory. This function of the processor can be realized by hardware, or can also be realized by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

The memory may be read-only memory (ROM), other types of static storage devices that can store static information and instructions, random access memory (random access memory, RAM), or other types of information and instructions that can be stored Dynamic storage devices can also be electrically erasable programmable read-only memory (electrically erasable programmable-read-only memory (EEPROM), read-only compact disc (compact disc read-only memory, CD-ROM) or other optical disc storage, optical disc storage ( (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can Any other media accessed by the computer, etc.

Optionally, the memory and the memory involved in the foregoing embodiments may be physically independent units, or the memory may be integrated with the processor.

In the embodiments of the present application, "at least one" refers to one or more, and "multiple" refers to two or more. "And/or" describes the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate the presence of A alone, A and B, and B alone. A and B can be singular or plural. The character "/" generally indicates that the related object is a "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, and c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c may be single or multiple.

Those of ordinary skill in the art may realize that the units and algorithm steps described in the embodiments disclosed herein can be implemented by a combination of electronic hardware, computer software, and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that for the convenience and conciseness of the description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided in this application, the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division manners in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical, or other forms.

The unit described as a separate component may not be physically separated, and the component displayed as the unit may not be a physical unit, that is, it may be located in one place, or may be distributed on multiple network units. Part or all of the units may be selected according to actual needs to achieve the purpose of the technical solution of the present application.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If this function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product, the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method in various embodiments of the present application. The foregoing storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

The above are only specific implementations of this application, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered by the protection scope of this application. The scope of protection of this application shall be subject to the scope of protection of the claims.

Claims

A communication method, characterized in that it includes:

The first terminal device obtains the configuration information of the bandwidth part BWP corresponding to at least two connection states respectively. The connection state is a connection state between the terminal device and the network device. The at least two connection states include an idle state, a connection state or Outside the network, the BWPs corresponding to the at least two connection states are used for side links;

The first terminal device switches from the first BWP to the second BWP according to the configuration information of the first BWP and the configuration information of the second BWP in the configuration information;

Wherein, the first BWP and the second BWP belong to BWP corresponding to the at least two connection states respectively.
The method according to claim 1, wherein the BWPs corresponding to the at least two connection states respectively include:

A BWP corresponding to the idle state; and/or

At least one corresponding BWP outside the network, and/or

At least one BWP corresponding to the connected state.
The method according to claim 1 or 2, wherein before the switching from the first BWP to the second BWP, the method further comprises:

The first terminal device receives switching instruction information from a network device or a second terminal device, where the switching instruction information is used to instruct the first terminal device to switch from the first BWP to the second BWP;

The switching from the first BWP to the second BWP includes:

The first terminal device switches from the first BWP to the second BWP according to the configuration information of the first BWP and the configuration information of the second BWP in the configuration information, and the switching instruction information .
The method according to claim 3, wherein the handover indication information is further used to indicate at least one of the following information:

The moment when the switch begins;

The moment when the switch is completed, or the duration of the BWP switch;

Transmission resources on the second BWP.
The method according to claim 1 or 2, wherein the first terminal device switches from the first BWP to the first BWP according to the configuration information of the first BWP and the configuration information of the second BWP in the configuration information The second BWP, including:

The first terminal device switches from the first BWP to the second BWP according to the configuration information of the first BWP and the configuration information of the second BWP in the configuration information, and pre-configured switching conditions;

The pre-configured switching condition is a correspondence between switching of the connection state of the first terminal device and BWP switching.
The method according to any one of claims 1 to 5, wherein the configuration information includes time-frequency resources of BWP corresponding to the at least two connection states, wherein,

The time-frequency resource of at least one BWP corresponding to the connected state is a subset of the time-frequency resource of BWP corresponding to the idle state; and/or,

The time-frequency resources of at least one BWP corresponding to the outside of the network are a subset of the time-frequency resources of the BWP corresponding to the idle state; and/or,

The time-frequency resource of at least one BWP corresponding to the connection state is a subset of the time-frequency resource of at least one BWP corresponding to the outside of the network; and/or,

The time-frequency resources of the BWP corresponding to the idle state are a subset of the time-frequency resources of at least one BWP corresponding to the outside of the network.
The method according to any one of claims 1 to 6, wherein before the switching from the first BWP to the second BWP, the method further comprises:

Sending, by the first terminal device, the BWP switching delay type supported by the first terminal device to the network device;

Wherein, different types of BWP switching delays supported by the first terminal device correspond to different BWP switching delays.
A communication method, characterized in that it includes:

The network device determines the configuration information of the bandwidth part BWP corresponding to at least two connection states of the first terminal device. The connection state is a connection state between the terminal device and the network device. The at least two connection states include an idle state and a connection In the state or outside the network, the BWPs corresponding to the at least two connection states are used for the side link;

The network device sends the configuration information to the first terminal device.
The method according to claim 8, wherein the BWPs corresponding to the at least two connection states respectively include:

A BWP corresponding to the idle state; and/or

At least one corresponding BWP outside the network, and/or

At least one BWP corresponding to the connected state.
The method according to claim 8 or 9, wherein the method further comprises:

When the first terminal device is in the connected state, the network device sends switching instruction information to the first terminal device, where the switching instruction information is used to instruct the first terminal device to switch from the first BWP to Second BWP.
The method according to claim 10, wherein the handover indication information is further used to indicate at least one of the following information:

The moment when the switch begins;

The moment when the switch is completed, or the duration of the BWP switch;

Transmission resources on the second BWP.
The method according to claim 8 or 9, wherein the method further comprises:

The network device sends a pre-configured switching condition to the first terminal device, where the pre-configured switching condition is a correspondence between switching of the connection state of the first terminal device and BWP switching.
The method according to any one of claims 8 to 12, wherein the configuration information includes time-frequency resources of BWP corresponding to the at least two connection states, wherein,

The time-frequency resource of at least one BWP corresponding to the connected state is a subset of the time-frequency resource of BWP corresponding to the idle state; and/or,

The time-frequency resources of at least one BWP corresponding to the outside of the network are a subset of the time-frequency resources of the BWP corresponding to the idle state; and/or,

The time-frequency resource of at least one BWP corresponding to the connection state is a subset of the time-frequency resource of at least one BWP corresponding to the outside of the network; and/or,

The time-frequency resources of the BWP corresponding to the idle state are a subset of the time-frequency resources of at least one BWP corresponding to the outside of the network.
The method according to any one of claims 8 to 13, wherein the method further comprises:

The network device receives the BWP handover delay type supported by the first terminal device and sent by the first terminal device;

Wherein, different types of BWP switching delays supported by the first terminal device correspond to different BWP switching delays.
A communication device, characterized in that it includes:

The transceiver unit is used to obtain the configuration information of the bandwidth part BWP corresponding to at least two connection states respectively. The connection state is the connection state between the terminal device and the network device. The at least two connection states include an idle state and a connected state Or outside the network, the BWPs corresponding to the at least two connection states are used for side links;

The processing unit is configured to switch from the first BWP to the second BWP according to the configuration information of the first BWP and the configuration information of the second BWP in the configuration information;

Wherein, the first BWP and the second BWP belong to BWP corresponding to the at least two connection states respectively.
The device according to claim 15, wherein the BWPs corresponding to the at least two connection states respectively include:

A BWP corresponding to the idle state; and/or

At least one corresponding BWP outside the network, and/or

At least one BWP corresponding to the connected state.
The apparatus according to claim 15 or 16, wherein the transceiver unit is further used to:

Receiving handover instruction information from a network device or a second terminal device, where the handover instruction information is used to instruct the first terminal device to switch from the first BWP to the second BWP;

The processing unit is further configured to switch from the first BWP to the second according to the configuration information of the first BWP and the configuration information of the second BWP in the configuration information, and the switching instruction information BWP.
The apparatus according to claim 17, wherein the switching instruction information is further used to indicate at least one of the following information:

The moment when the switch begins;

The moment when the switch is completed, or the duration of the BWP switch;

Transmission resources on the second BWP.
The apparatus according to claim 15 or 16, wherein the processing unit is further configured to:

Switching from the first BWP to the second BWP according to the configuration information of the first BWP and the configuration information of the second BWP in the configuration information, and pre-configured switching conditions;

The pre-configured switching condition is a correspondence between switching of the connection state of the first terminal device and BWP switching.
The apparatus according to any one of claims 15 to 19, wherein the configuration information includes time-frequency resources of BWP corresponding to the at least two connection states, wherein,

The time-frequency resource of at least one BWP corresponding to the connected state is a subset of the time-frequency resource of BWP corresponding to the idle state; and/or,

The time-frequency resources of at least one BWP corresponding to the outside of the network are a subset of the time-frequency resources of the BWP corresponding to the idle state; and/or,

The time-frequency resource of at least one BWP corresponding to the connection state is a subset of the time-frequency resource of at least one BWP corresponding to the outside of the network; and/or,

The time-frequency resources of the BWP corresponding to the idle state are a subset of the time-frequency resources of at least one BWP corresponding to the outside of the network.
The device according to any one of claims 15 to 20, wherein the transceiver unit is further used to:

Sending the BWP switching delay type supported by the first terminal device to the network device;

Wherein, different types of BWP switching delays supported by the first terminal device correspond to different BWP switching delays.
A communication device, characterized in that it includes:

The processing unit is configured to determine configuration information of the bandwidth part BWP corresponding to at least two connection states of the first terminal device, the connection state is a connection state between the terminal device and the network device, and the at least two connection states include idle State, connection state or outside the network, the BWPs corresponding to the at least two connection states are used for the side link;

The transceiver unit is configured to send the configuration information to the first terminal device.
The device according to claim 22, wherein the BWPs corresponding to the at least two connection states respectively include:

A BWP corresponding to the idle state; and/or

At least one corresponding BWP outside the network, and/or

At least one BWP corresponding to the connected state.
The apparatus according to claim 22 or 23, wherein when the first terminal device is in a connected state, the transceiver unit is further configured to:

Sending handover instruction information to the first terminal device, where the handover instruction information is used to instruct the first terminal device to switch from the first BWP to the second BWP.
The device according to claim 24, wherein the switching instruction information is further used to indicate at least one of the following information:

The moment when the switch begins;

The moment when the switch is completed, or the duration of the BWP switch;

Transmission resources on the second BWP.
The apparatus according to claim 22 or 23, wherein the transceiver unit is further used to:

Sending a pre-configured switching condition to the first terminal device, where the pre-configured switching condition is a correspondence between switching of the connection state of the first terminal device and BWP switching.
The apparatus according to any one of claims 22 to 26, wherein the configuration information includes time-frequency resources of BWP corresponding to the at least two connection states, wherein,

The time-frequency resource of at least one BWP corresponding to the connected state is a subset of the time-frequency resource of BWP corresponding to the idle state; and/or,

The time-frequency resources of at least one BWP corresponding to the outside of the network are a subset of the time-frequency resources of the BWP corresponding to the idle state; and/or,

The time-frequency resource of at least one BWP corresponding to the connection state is a subset of the time-frequency resource of at least one BWP corresponding to the outside of the network; and/or,

The time-frequency resources of the BWP corresponding to the idle state are a subset of the time-frequency resources of at least one BWP corresponding to the outside of the network.
The device according to any one of claims 22 to 27, wherein the transceiver unit is further used to:

Receiving the BWP switching delay type supported by the first terminal device and sent by the first terminal device;

Wherein, different types of BWP switching delays supported by the first terminal device correspond to different BWP switching delays.
A communication device, characterized in that it includes:

Memory, used to store computer programs;

A processor, configured to execute a computer program stored in the memory, so that the device executes the communication method according to any one of claims 1 to 14.
A computer-readable storage medium including a computer program which, when run on a computer, causes the computer to execute the communication method according to any one of claims 1 to 14.