CN110677887B

CN110677887B - Switching method, switching indication method, device, terminal, service node and medium

Info

Publication number: CN110677887B
Application number: CN201910974681.4A
Authority: CN
Inventors: 魏兴光; 郝鹏; 李剑; 梁春丽; 李儒岳
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2019-10-14
Filing date: 2019-10-14
Publication date: 2024-02-09
Anticipated expiration: 2039-10-14
Also published as: CN110677887A

Abstract

The application provides a switching method, a switching indication method, a device, a terminal, a service node and a medium. The method receives a handover indication signaling; and switching the first bandwidth part BWP to the second BWP in the target serving cell according to the switching indication signaling.

Description

Switching method, switching indication method, device, terminal, service node and medium

Technical Field

The present invention relates to a wireless communication network, for example, to a handover method, a handover instruction method, a device, a terminal, a service node, and a medium.

Background

The Fifth Generation mobile communication (5G) system supports a larger system Bandwidth than the previous wireless communication system, and a concept of a partial Bandwidth (BWP) is introduced in the 5G system. The BWP refers to a continuous bandwidth, and the terminal does not need to support data transceiving in the whole system bandwidth, but only needs to support data transceiving in a part of the BWP bandwidth. In the case that the terminal has the capability of configuring a plurality of BWP, the state switching of the terminal in the target serving cell can be realized by using the BWP switching technology. For power saving, the target serving cell may operate in BWP of "Dormant-like" state, i.e. not monitor the physical downlink control channel (Physical Downlink Control Channel, PDCCH) or monitor the PDCCH with a larger periodicity. However, in the case of an increased service demand, BWP handover needs to be performed on the target serving cell, and if BWP handover cannot be completed in time, BWP handover is inefficient, which may affect communication quality and even cause data communication to be out of synchronization.

Disclosure of Invention

The application provides a switching method, a switching indication method, a device, a terminal, a service node and a medium, so as to realize the BWP rapid switching on a target service cell and improve the communication efficiency.

The embodiment of the application provides a switching method, which comprises the following steps:

receiving a switching indication signaling;

and switching from the first BWP to the second BWP in the target serving cell according to the switching indication signaling.

The embodiment of the application also provides a switching indication method, which comprises the following steps:

determining a switching indication signaling, wherein the switching indication signaling is used for indicating the terminal to switch from a first BWP to a second BWP in a target service cell;

and sending the switching indication signaling.

The embodiment of the application also provides a switching device, which comprises:

a receiving module configured to receive a handover indication signaling;

and the switching module is used for switching the first BWP to the second BWP in the target service cell according to the switching indication signaling.

The embodiment of the application also provides a switching indicating device, which comprises:

a signaling determining module, configured to determine a handover indication signaling, where the handover indication signaling is used to instruct a terminal to perform a handover from a first BWP to a second BWP in a target serving cell;

And the sending module is used for sending the switching indication signaling.

The embodiment of the application also provides a terminal, which comprises:

one or more processors;

a storage means for storing one or more programs;

when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the handover method described above

The embodiment of the application also provides a communication node, which comprises:

one or more processors;

a storage means for storing one or more programs;

the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the handoff direction method described above.

The embodiment of the application also provides a computer readable storage medium, and a computer program is stored on the computer readable storage medium, and when the program is executed by a processor, the above-mentioned switching method or the switching indication method is realized.

Drawings

FIG. 1 is a flow chart of a handover method according to an embodiment;

fig. 2 is a schematic diagram of cross-carrier scheduling and self-scheduling performed by an auxiliary serving cell in an embodiment;

FIG. 3 is a flowchart of a handover indication method according to an embodiment;

FIG. 4 is a schematic diagram of a switching device according to an embodiment;

fig. 5 is a schematic structural diagram of a switching indication device according to an embodiment;

fig. 6 is a schematic structural diagram of a terminal according to an embodiment;

fig. 7 is a schematic structural diagram of a service node according to an embodiment.

Detailed Description

The present application is described below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not limiting thereof. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be arbitrarily combined with each other. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings.

In the 5G system, compared with the conventional wireless communication system, a larger system bandwidth is supported, and a User Equipment (UE) wants to support such a large system bandwidth, both of the cost and the power consumption are greatly increased. The concept of BWP was introduced in the 5G system. The BWP refers to a continuous bandwidth, and the terminal does not need to support data transceiving in the whole system bandwidth, but only needs to support data transceiving in a part of the BWP bandwidth. In the current 5G system, each terminal configures up to 4 uplink BWP and 4 downlink BWP on each carrier. Each terminal can only have one active upstream BWP and one active downstream BWP at the same time. The configuration on each BWP may be different, and the terminal may dynamically adjust the activation BWP according to the traffic situation. For example, the terminal is configured with 2 downlink BWP, wherein BWP1 bandwidth is large and BWP2 bandwidth is small, and in case of a large downlink traffic volume of the terminal, the terminal can activate BWP1 for downlink traffic transmission; in case of a small downlink traffic of the terminal, the terminal may activate BWP2 to save energy. The BWP switch delay mainly depends on the tactitionjtime (including parsing delay of a medium access Control layer Control unit (Medium Access Control-Control Element, MAC-CE)), wake-up delay of Radio Frequency (RF), AGC adjustment delay, and time-Frequency offset synchronization delay, etc.

In case the terminal is capable of configuring a plurality of BWP, a BWP switching technique may be utilized to achieve a switching between different BWP configured by the target serving cell. For energy saving, the active BWP of the target serving cell may be configured with a larger PDCCH monitoring period or configured with BWP that does not monitor PDCCH. For convenience of description, the BWP configured with a larger PDCCH monitoring period/CSI-RS transmission period or configured without monitoring the PDCCH is referred to as a first BWP, and the BWP configured with a PDCCH monitoring period or CSI-RS transmission period smaller than the first BWP is referred to as a second BWP. In case of increased traffic demand, the active BWP of the target serving cell may be switched from the first BWP to the second BWP by performing the BWP switching on the target serving cell.

For Secondary Cell (SCell), since the terminal does not detect PDCCH on the first BWP or performs PDCCH detection with a lower frequency (larger period), the SCell cannot quickly switch to the second BWP by using own downlink control information (Downlink Control Information, DCI) for scheduling, but can only switch to the second BWP by using the PCell or other scells working on the second BWP, but the configuration of cross-carrier scheduling in the 5G New Radio, NR) protocol is with granularity of carrier, that is, cross-carrier scheduling is supported and configured on some carriers, and cross-carrier scheduling is not configured on some carriers, for cross-carrier scheduling with different configurations, it is more complex to implement quick switch from the first BWP to the second BWP, if BWP switch cannot be completed in time, BWP switch efficiency is low, which affects communication quality and even causes data communication to be out of synchronization.

In the embodiment of the application, a switching method is provided, in which a terminal performs BWP switching on a target serving cell according to a switching instruction signaling sent by a serving node, so that the BWP can be rapidly switched no matter whether the target serving cell is configured with cross-carrier scheduling or not, and the communication efficiency and reliability are improved.

Fig. 1 is a flowchart of a handover method according to an embodiment. The switching method provided by the embodiment can be applied to the terminal. As shown in fig. 1, the handover method includes steps 110 and 120.

In step 110, handover indication signaling is received.

In step 120, a handover of the first bandwidth part BWP to the second BWP is performed in the target serving cell according to the handover indication signaling.

In this embodiment, the handover indication signaling is used to instruct the terminal to perform handover from the first BWP to the second BWP on the target serving cell, where the handover indication signaling may be indicated by DCI carried on the scheduling serving cell, or may be indicated by dedicated DCI carried on the first serving cell, where the first serving cell is a serving cell of the BWP operating on PDCCH with frequent monitoring (with smaller monitoring period) or is a Primary serving cell (PCell). For example, if the target serving cell supports and configures cross-carrier scheduling, the handover indication signaling may be sent or indicated by DCI of the scheduling target serving cell, where the DCI of the scheduling target serving cell is sent by the serving node on the scheduling serving cell, which may be a PCell or other SCell operating in conventional BWP; if the target serving cell is not configured with cross-carrier scheduling, a switching indication signaling can be sent or indicated through the special DCI of the first serving cell; alternatively, if the target serving cell supports and configures cross-carrier scheduling, both DCI scheduling the target serving cell and dedicated DCI for the first serving cell may be used to send handover indication signaling, thereby indicating that the terminal completes BWP handover. The target serving cell may be one or more.

Fig. 2 is a schematic diagram of cross-carrier scheduling and self-scheduling performed by a secondary serving cell in an embodiment. As shown in fig. 2, the left SCell supports cross-carrier scheduling, and the terminal does not need to detect PDCCH on the SCell. For the SCell on the left, if the currently activated BWP is the first BWP, in case that the SCell needs to be handed over to the second BWP, the terminal may complete the handover to the second BWP by monitoring downlink control information on a scheduling serving cell (primary serving cell) which schedules the SCell. For the SCell on the right, the SCell will operate in the first BWP for energy saving without a large traffic demand, as it is self-scheduling. Whereas for scells operating in the first BWP, the SCell cannot quickly switch to the regular BWP by its own scheduling DCI, but rather, the switch to the second BWP is done by the PCell or other dedicated DCI operating on the SCell of the regular BWP, since PDCCH is not detected or PDCCH is detected at a lower frequency.

According to the switching method of the embodiment, the terminal performs BWP switching on the target service cell according to the switching instruction signaling sent by the service node, and whether the target service cell is configured with cross-carrier scheduling or not, the rapid BWP switching can be realized, and the communication efficiency and reliability are improved.

In an embodiment, the period parameters corresponding to the first BWP and the second BWP are different, and the period parameters include at least one of the following: a monitoring period of the PDCCH and a transmission period of a channel state information Reference Signal (CSI-RS).

In this embodiment, at least one of the PDCCH monitoring period of the BWP (i.e., the first BWP and the second BWP) configuration before and after the handover and the transmission period of the CSI-RS is different, for example, the period parameter corresponding to the first BWP is greater than the period parameter corresponding to the second BWP; alternatively, the first BWP is configured to not monitor the PDCCH, a monitoring period parameter of the PDCCH corresponding to the first BWP does not exist, and the second BWP is configured to monitor the PDCCH. In the case that the terminal is in the first BWP, the terminal monitors the PDCCH or does not monitor the PDCCH in a longer period, so as to save power consumption of the terminal, and the first BWP is the BWP in the "sleep-like state", and the terminal can switch from the first BWP to the second BWP on the target serving cell according to the switch indication signaling.

Without causing confusion, the following second BWP has the same meaning as the conventional BWP, and the first BWP has the same meaning as the "sleep-like" BWP.

It should be noted that the first BWP and the second BWP may be two BWP with different physical resources (occupied frequency domain resources), or may be BWP with different configuration parameters, such as different configuration cycle parameters or bandwidths, which occupy the same frequency domain resources, and represent different BWP through different configuration parameters; when the physical resources of the two are different, the handover between the two is called BWP handover, and when the physical resources of the two are the same, the handover between BWP states is performed, and the two handovers are not distinguished for simplicity of description.

In an embodiment, in a case that the target serving cell includes a serving cell configured for cross-carrier scheduling, the handover indication signaling is indicated by DCI transmitted on the scheduling serving cell; the DCI comprises DCI for scheduling downlink transmission and DCI for scheduling uplink transmission.

In an embodiment, in a case where DCI is used to schedule downlink transmission, the second BWP is a BWP indicated by a BWP control field of the DCI; alternatively, in the case that DCI is used to schedule downlink transmission, the second BWP is a set BWP, which is a BWP where the target serving cell is located before entering the first BWP, or a BWP where the period parameter configured for the target serving cell is the smallest.

The present embodiment enables the monitoring PDCCH or transmitting CSI-RS more frequently by switching from the first BWP to the BWP indicated by the BWP control domain in the target serving cell, or switching to the BWP where the target serving cell is located before entering the first BWP, or switching to the BWP where the period parameter configured by the target serving cell is the smallest, so as to implement switching from the first BWP to the second BWP, thereby ensuring that the serving cell can be quickly operated in the conventional BWP under the condition of a large amount of traffic demands, so as to quickly complete the traffic transmission.

In an example, the terminal configures 4 serving cells, PCell and SCell1 to SCell 3, respectively, wherein SCell1 configures cross-carrier scheduling by PCell, SCell 2 and SCell 3 configure self-scheduling, and no cross-carrier scheduling is configured. Assuming that 3 scells are respectively configured with 3 BWP, the transmission period of the CSI-RS configured with 3 BWP on each SCell is sequentially from short to long, which may be denoted as T _CSI-RS,BPW1 <T _CSI-RS,BPW2 <T _CSI-RS,BPW3 The method comprises the steps of carrying out a first treatment on the surface of the The PDCCH monitoring periods configured on the three BWP of the secondary serving cells SCell 2 and SCell 3 for self-scheduling are also sequentially from short to long, respectively, and may be denoted as T _PDCCH,BPW1 <T _PDCCH,BPW2 <T _PDCCH,BPW3 The method comprises the steps of carrying out a first treatment on the surface of the The bandwidths configured on the three BWP are assumed to be sequentially from large to small and can be represented as B _BPW1 >B _BPW2 >B _BPW3 . In the case of low traffic demand, in order to save power consumption of the terminal, all scells switch to BWP 3, and since the CSI-RS transmission period of BWP 3 on each SCell is larger, the PDCCH monitoring period of the corresponding BWP 3 is also relatively longer for the self-scheduled SCell 2 and SCell 3, and the bandwidth is also smaller, and the three scells entering BWP 3 can save terminal energy consumption. It is assumed that before entering BWP 3, the BWP where SCell1, SCell 2 and SCell 3 are located is respectively corresponding BWP 1, BWP 2, BWP 1. In this example, BWP 3 corresponds to the first BWP, and other BWP may be used as the second BWP.

In order to meet the service requirement and quickly transmit the service, the switching method of the embodiment can ensure that the terminal is quickly switched to the conventional BWP capable of transmitting a large amount of service. In combination with the above example, SCell 2 is configured with cross-carrier scheduling, so that BWP handover may be indicated by DCI sent on the PCell to schedule downlink transmission, and SCell 2 is directly scheduled on BWP capable of large traffic transmission by the cross-carrier scheduled DCI, for example, to BWP 1 of SCell 2. The DCI for cross-carrier scheduling includes a carrier index control field (Carrier Index Field, CIF) and a BWP control field, and the two control fields may instruct the target serving cell to switch to the second BWP. Wherein the BWP control field is a control field containing 2 bits, and can indicate at most 4 BWP indexes, and the BWP control field can indicate the terminal to switch to any BWP configured in the target serving cell during the BWP switching process. In some embodiments, the terminal may also switch to a set BWP, for example, to the BWP where the target serving cell is located before entering the first BWP, i.e. BWP 1 of SCell 2 in the above example, or to the BWP where the periodicity parameter of the SCell 2 configuration is the smallest, i.e. BWP 1.

In this embodiment, the CIF control field indicates the serving cell being scheduled.

In an embodiment, in case that DCI is used for downlink scheduling, the handover indication signaling is indicated by a new control domain of the downlink control information, where the new control domain is a 1-bit control domain.

In an embodiment, in a case where the value of the new control field is 1, the DCI is used to indicate a regular downlink transmission, the CIF control field of the DCI is used to indicate a target serving cell that is scheduled across carriers, and the BWP control field of the DCI is used to indicate the second BWP, where a specific implementation is similar to the above embodiment, except that a 1-bit new control field is added.

In an embodiment, in a case where a value of the new control field is 0, the DCI is used to indicate that a handover from the first BWP to the second BWP is performed in the target serving cell, and is used to indicate that there is no downlink transmission.

In this embodiment, when the target serving cell includes a serving cell supporting and configured with cross-carrier scheduling, one downlink transmission may be scheduled through DCI format 1_1, where a CIF control field in DCI format 1_1 is used to indicate the target serving cell being cross-carrier scheduled, and a BWP control field is used to indicate a second BWP; the BWP handover may also be indicated by the DCI format 1_1, but the DCI format 1_1 does not indicate downlink data transmission, and a new 1-bit information is introduced to indicate whether the DCI format 1_1 is to schedule downlink data, where the CIF control field of the DCI format 1_1 is used to indicate a target serving cell for the BWP handover if there is no downlink data transmission (in this case, the target serving cell includes not only a serving cell scheduled across carriers but also other serving cells), and the BWP control field is used to indicate a second BWP. In other embodiments, BWP handover may also be indicated by DCI format 0_1, i.e. by dedicated DCI, which is applicable to target serving cells supporting and configured with cross-carrier scheduling, as well as target serving cells not supporting or configured with cross-carrier scheduling.

In an embodiment, the target serving cell is determined according to a CIF control field of the downlink control information; the second BWP is a BWP indicated by the BWP control field of the downlink control information, or the second BWP is a set BWP, where the set BWP is a BWP where the target serving cell is located before entering the first BWP or a BWP where a period parameter configured for the target serving cell is the smallest; the corresponding relation between the CIF control domain and the auxiliary service cell or the auxiliary service cell group is configured by a high layer or is determined according to a first preset mapping relation.

In the above embodiment, the CIF control field is used to indicate the target serving cell, and the BWP control field is used to indicate the second BWP, and specifically includes:

mode 1) each bit in the CIF control domain corresponds to one SCell or SCell group, wherein the correspondence between the scells or SCell groups in the CIF control domain is determined by higher layer configuration or according to a first preset mapping relationship; or,

mode 2) the CIF control field is configured to indicate an index of a target serving cell and to indicate that the terminal is automatically switched to a second BWP indicated by the BWP control field; or,

mode 3) the target serving cell is handed over to the set BWP without indicating the second BWP through the BWP control field.

In an embodiment, the CIF control field is configured to indicate whether the target serving cell is mode 1) or mode 2) by signaling, or whether the second BWP is indicated by the BWP control field by signaling.

In an embodiment, in a case that DCI is used to schedule Uplink transmission, a handover indication signaling is indicated through an Uplink-Shared Channel (UL-SCH) control field and a preset control field of the DCI.

In this embodiment, in the case that the terminal has a large amount of traffic to transmit, the service node indicates BWP handover of the terminal by transmitting one DCI (DCI format 0_1) for scheduling uplink transmission on the PCell. The value of the UL-SCH control field of the DCI is a preset value. Taking the value of the UL-SCH control field as 0 as an example, by setting the value of the UL-SCH control field as 0, triggering the transmission of an aperiodic CSI-RS without uplink data transmission and/or the reporting of an aperiodic CSI report, in this case, the preset control field of the DCI is set to a preset value, so as to instruct the terminal to perform BWP handover, and the terminal also performs measurement and reporting of CSI during the BWP handover, so as to provide accurate CSI information required for handover to conventional BWP.

In an embodiment, the preset control domain includes a channel state information (Channel State Information, CSI) request domain; and under the condition that the value of the uplink shared channel indication field is a preset value and the value of the CSI request field is 0, the DCI is used for indicating the switching from the first BWP to the second BWP in the target service cell.

In this embodiment, taking the value of the UL-SCH control field as an example, when the value of the CSI request field is 0, the DCI may be used to instruct the terminal to perform BWP handover. And the terminal determines a target service cell according to the CIF control domain in the DCI under the condition of receiving the DCI.

In an embodiment, the preset control domain includes a CSI request domain; and under the conditions that the value of the uplink shared channel indication field is a preset value, the value of the CSI request field is greater than 0, the CSI request field triggers the transmission of the aperiodic CSI-RS, and the CSI request field does not trigger the reporting of the CSI report, the DCI is used for indicating the switching from the first BWP to the second BWP in the target serving cell.

In this embodiment, taking the value of the UL-SCH control field as 0 as an example, if the value of the CSI request field is greater than 0, if the CSI request field only triggers transmission of the aperiodic CSI-RS and does not trigger reporting of the CSI report (for example, in the case of report quality= 'none' in the CSI report parameter configured in a higher layer), the serving node may instruct the terminal to perform BWP handover through the DCI. And the terminal determines a target service cell according to the CIF control domain in the DCI under the condition of receiving the DCI.

In an embodiment, the target serving cell is determined according to the CIF control field of the DCI; the corresponding relation between the CIF control domain and the SCell or SCell group is configured by a higher layer or determined according to a second preset mapping relation.

In this embodiment, the terminal determines the target serving cell according to the CIF control field in the DCI, and for other control fields, the terminal may be set to 0 or 1 to enhance the reliability of the DCI.

In this embodiment, the CIF control field is used to indicate a target serving cell, and the BWP control field is used to indicate a second BWP, and specifically includes:

mode 1) each bit in the CIF control domain corresponds to one SCell or SCell group, wherein the correspondence between the scells or SCell groups in the CIF control domain is determined by higher layer configuration or according to a second preset mapping relationship; or,

In combination with the above example, the number of scells is 3, and the CIF control field may be 3 bits, where the 3 scells are in one-to-one correspondence with the 3 bits. In the case that the service node indicates that the terminals SCell 1-3 are all switched to the conventional BWP, the 3 bits of the CIF control field in the DCI sent by the service node may be set to 1. In some embodiments, scells may also be grouped into a maximum of 3 groups, corresponding one-to-one to 3 bits of the CIF control field. The corresponding relation between the CIF control domain and the SCell or the SCell group is configured by a higher layer, or is determined according to a second preset mapping relation, for example, after performing modulo 3 operation on the cell index of the SCell, the remainder is 0, 1, 2, and corresponds to 3 bits of the CIF control domain.

In an embodiment, the target serving cell is determined according to the CIF control field of the DCI; the CIF control field indicates a target serving cell for which a BWP handover is to be performed. The target serving cell may be a serving cell for cross-carrier scheduling, or may be a serving cell for non-cross-carrier scheduling.

In this embodiment, in combination with the above example, the scells have three scells 2 to 4, and the CIF is a three-bit control domain, so if the SCell2 is to be instructed to perform BWP handover, the CIF control domain only needs to indicate the cell index of the SCell2, that is, the CIF control domain indicates a target serving cell that can be scheduled across carriers; similarly, if the SCell 3 is to be instructed to perform BWP handover, the cell index of the CFI control domain corresponding to the SCell 3 is set, that is, the CIF control domain indicates a serving cell that is not scheduled by cross carrier.

In contrast to the two examples above, the CIF control field may be used to indicate either a specific target cell or a group of cells, in particular in which way it is configurable.

In an embodiment, the second BWP is a BWP indicated by a BWP control field of the downlink control information; or, the second BWP is a set BWP, where the set BWP is the BWP where the target serving cell is located before entering the first BWP or the BWP where the period parameter configured for the target serving cell is the smallest;

In an embodiment, the terminal determines the target serving cell according to the CIF control field in the DCI and determines the second BWP according to the BWP indication field. In this embodiment, the target serving cell indicated by the CIF control field to be BWP switched is switched to the second BWP indicated by the BWP indication field. It should be noted that, in case that DCI format 0_1 has a value of 1 in UL-SCH control field, the terminal is instructed to perform PUSCH with one uplink traffic transmission, in this case, BWP is instructed to fieldIs an uplink BWP indicating that the PUSCH is to be transmitted, whereas in the present embodiment, the BWP indication field indicates that a switch from BWP in a "sleep-like state" to a second BWP is to be performed, where BWP refers to downlink BWP, so in order to ensure that DCI format 0_1 is the same in both scenarios, the number of bits of the BWP indication field should be the sameWherein (1)>And->The maximum value of the uplink BWP number and the downlink BWP number of each serving cell configuration of the terminal configuration is represented.

In an embodiment, the preset control domain includes a CSI request domain; when the value of the uplink shared channel indication field is a preset value, the value of the CSI request field is greater than 0, the CSI request field triggers transmission of a cross-carrier aperiodic CSI-RS, and a target serving cell where the cross-carrier aperiodic CSI-RS is located is in a first BWP, the DCI is used to indicate handover from the first BWP to a second BWP in the target serving cell; the aperiodic CSI-RS is transmitted through the first BWP or the second BWP.

In this embodiment, taking the value of the UL-SCH control field as 0 as an example, if the value of the CSI request field is greater than 0, if the CSI request field triggers transmission of a cross-carrier aperiodic csi_rs and the target serving cell where the cross-carrier aperiodic csi_rs is located is in the first BWP, the serving node may instruct the terminal to perform BWP handover through the DCI. In this case, the aperiodic csi_rs may be transmitted on the first BWP and then switched to the second BWP; or first switch to the second BWP, and then transmit the aperiodic csi_rs on the second BWP. The aperiodic csi_rs is transmitted in the first BWP or the second BWP, and is agreed in advance with the terminal by the serving node to ensure that the terminal performs channel quality measurement of the csi_rs on the correct BWP.

In this embodiment, the terminal does not need to report the CSI report. In some embodiments, the CSI request field may also trigger reporting of CSI reports. For the case that the terminal needs to report the CSI report, in the case that the aperiodic csi_rs is sent on the first BWP, the CSI report may be reported before BWP handover or may be reported after BWP handover, and the time for reporting the CSI report by the terminal may be indicated by DCI.

The method of DCI indicating BWP handover in this embodiment is also applicable to the case where the value of UL-SCH control field is 1.

In an embodiment, the value of the uplink shared channel indication field includes a first preset value and a second preset value, where CSI trigger state configuration information (CSI Trigger State Configuration) corresponding to the first preset value is different from CSI trigger state configuration information corresponding to the second preset value.

In this embodiment, different CSI trigger state configuration information is configured for the case where the value of the UL-SCH control field is 0 and the value of the UL-SCH control field is 1, respectively. For example, in case that the value of the CSI request field is 1, if the value of the UL-SCH control field is 0, a CSI trigger state configuration information is configured; if the value of the UL-SCH control field is 1, another CSI trigger state configuration information is configured. The CSI configuration corresponding to the CSI trigger state configuration information may include BWP switch indication information, for example, switch from the first BWP to the second BWP. In an embodiment, in case that the value of the UL-SCH control field is 0, all or part of CSI trigger state configuration information may be configured to represent the handoff of BWP.

In an embodiment, the handover indication signaling is indicated by dedicated downlink control information corresponding to the first serving cell.

In an embodiment, the first serving cell is a serving cell operating on a BWP of which the monitoring period of the PDCCH is smaller than a set threshold; alternatively, the first serving cell is a PCell.

In combination with the above example, for SCell2 or SCell3 that does not support or is not configured with cross-carrier scheduling, its PDCCH monitoring period is longer in the case where SCell2 or SCell3 is operating in the first BWP, and if BWP handover is performed through PDCCHs transmitted on serving cells of SCell2 and SCell3 themselves, the efficiency is low, and fast BWP handover cannot be achieved. Thus, the handover indication signaling may be indicated by a dedicated DCI sent by the serving node on the first serving cell for indicating a BWP handover, and the terminal switches to the second BWP according to the handover indication signaling indicated by the dedicated DCI. The first serving cell is a serving cell or PCell on BWP operating on PDCCH with a monitoring period smaller than a set threshold (in a normal state).

In an embodiment, the dedicated downlink control information includes at least two control domains; each control field contains 1 bit or 2 bits; each control domain corresponds to one SCell or group of scells other than the first serving cell and not configured for cross-carrier scheduling.

In an embodiment, the correspondence between each control domain and the SCell or SCell group is configured by a higher layer or determined according to a third preset mapping relationship.

For example, each control domain bit is from high to low, corresponding to a small to large cell index SCell or SCell group, respectively, the index of the SCell or SCell group corresponding to the highest bit being the smallest, etc.

In an embodiment, in case each control field contains 1 bit, the value of the 1 bit is 0 or 1; the target serving cell comprises an SCell or an SCell group corresponding to a control domain with a value of 1; the second BWP is a BWP where the SCell or SCell group is located before entering the first BWP, or a BWP where the periodicity parameter configured for the target serving cell is smallest.

In this embodiment, in the case where each control field contains 1 bit, the value of the control field is 1 or 0. Under the condition that the value of the control domain is 1, the SCell or the SCell group corresponding to the control domain is the target serving cell, BWP needs to be switched, and the switched second BWP is the BWP where the SCell or the SCell group corresponding to the control domain is located before entering the first BWP, or the BWP with the smallest cycle parameter configured for the SCell or the SCell group corresponding to the control domain; when the value of the control domain is 0, the SCell or SCell group corresponding to the control domain does not perform BWP handover.

In connection with the above example, it is assumed that, due to the small traffic demand, SCell3 is in BWP 3 until entering BWP 3, that is, the BWP where SCell3 is in "dormant-like" BWP before entering the first BWP, in this case, if the terminal receives the dedicated DCI, and each control field of the dedicated DCI contains only 1 bit, and the preset control field of the corresponding SCell3 is set to "1", the dedicated DCI may instruct the terminal to perform BWP handover on SCell3, and because of the BWP where SCell3 is in "dormant-like" BWP before entering the first BWP, SCell3 needs to be handed over to the BWP with the predetermined configuration BWP, that is, BWP 1 with the smallest periodicity parameter configured on SCell 3.

In an embodiment, where each control field contains 2 bits, the value of each control field corresponds to one BWP index.

In this embodiment, in the case where each control field contains 2 bits, the value of the control field corresponds to one BWP index. Since a maximum of 4 BWP per serving cell can be configured, the control field contains a maximum of 2 bits, i.e. all BWP of the serving cell can be indicated.

In the above embodiment, the target serving cell supporting and configured to perform cross-carrier scheduling indicates the terminal to perform BWP handover through DCI of cross-carrier scheduling; target cells which do not support or are not configured with cross-carrier scheduling can be divided into one or more service cell groups, the service cell groups do not comprise service cells which support cross-carrier scheduling and are configured with cross-carrier scheduling, and BWP switching is realized on the service cell groups in a special DCI indication mode, namely, the DCI and the special DCI which are used independently and do not interfere with each other.

In an embodiment, in case the target serving cell includes an SCell or a group of scells configured for cross-carrier scheduling, the handover indication signaling is indicated by at least one of DCI scheduling the target serving cell and dedicated DCI corresponding to the first serving cell.

In this embodiment, the target serving cell may include an SCell or SCell group that supports and is configured to cross-carrier scheduling, or may include an SCell or SCell group that is not configured to cross-carrier scheduling, where in this case, the switching of BWP may be indicated by scheduling DCI of the target serving cell and dedicated DCI of the first serving cell. For scells supported and configured for cross-carrier scheduling, the terminal may receive both DCI for cross-carrier scheduling and dedicated DCI, which may be received simultaneously or sequentially.

In an embodiment, in a case that the handover indication signaling is indicated by the DCI of the cross-carrier scheduling and the dedicated DCI, the performing, according to the handover indication signaling, handover from the first BWP to the second BWP in the target serving cell includes:

under the condition that the DCI of the cross-carrier scheduling is received firstly and the special DCI is received later, switching from the first BWP to the second BWP is carried out in the target service cell according to the DCI of the cross-carrier scheduling and the special DCI respectively, or switching from the first BWP to the second BWP is carried out in the target service cell according to the DCI of the cross-carrier scheduling;

under the condition that the cross-carrier scheduling DCI and the special DCI are received at the same time, switching from the first BWP to the second BWP is carried out in a target service cell according to the cross-carrier scheduling DCI;

And under the condition that the special DCI is received firstly and then the cross-carrier scheduling DCI is received, switching from the first BWP to the second BWP is carried out in the target serving cell according to the special DCI and the DCI respectively.

In this embodiment, the dedicated DCI sent on the first serving cell includes a plurality of control domains, each control domain corresponds to one SCell or SCell group, where the SCell or SCell group may support and be configured to cross-carrier scheduling, and the control domain of the dedicated DCI may be referred to the above embodiments.

In combination with the above example, for an SCell configured for cross-carrier scheduling, i.e., SCell 2, the terminal receives DCI for cross-carrier scheduling at a certain time T1, which indicates the terminal to make a BWP handover, e.g., to BWP2, on SCell 2; and, at a later time T2 (T2 > T1), a dedicated DCI is received, the dedicated DCI indicating that the terminal performs BWP handover on SCell 2, in which case the response of the terminal to the dedicated DCI may be: the terminal switches to the corresponding BWP according to the indication of the dedicated DCI, e.g., each control field of the dedicated DCI is 2 bits, and then switches to the BWP corresponding to the BWP index indicated by the control field on SCell 2, e.g., each control field of the dedicated DCI is 1 bit, and then switches to the BWP where SCell 2 was located before entering the first BWP, i.e., BWP2 in the above example. The response of the terminal to the dedicated DCI may be: the BWP switch is not made according to the indication of the dedicated DCI, i.e. the dedicated DCI only works for scells in the "dormant-like" BWP and not for scells already in conventional BWP, in this example the terminal has switched to conventional BWP2 according to the DCI at time T1, so the dedicated DCI at time T2 does not work and the terminal does not switch again according to the dedicated DCI.

In the above example, if t2=t1, that is, the terminal receives the DCI for cross-carrier scheduling and the dedicated DCI at the same time, the terminal UE performs BWP handover according to the received DCI for cross-carrier scheduling, and ignores the indication of the dedicated DCI.

In the above example, for SCell2, if the terminal receives the dedicated DCI first, BWP switching is performed according to the indication of the dedicated DCI, and then, if DCI for cross-carrier scheduling is received, BWP switching may be performed according to the indication of the DCI.

According to the switching method of the embodiment, the target serving cell can support and configure cross-carrier scheduling, or can not support or configure cross-carrier scheduling, and through setting a perfect switching mechanism, the serving node sends DCI and/or special DCI to the terminal, and the terminal completes the rapid switching of BWP according to the indication of the DCI and/or the special DCI.

The embodiment of the application also provides a switching indication method. Fig. 3 is a flowchart of a handover indication method according to an embodiment, as shown in fig. 3, where the handover indication method according to the embodiment includes steps 210 and 220.

In step 210, a handover indication signaling is determined, where the handover indication signaling is used to instruct the terminal to perform a handover from the first BWP to the second BWP in the target serving cell.

In step 220, the handover indication signaling is sent.

In this embodiment, the handover indication signaling is used to instruct the terminal to perform handover from the first BWP to the second BWP on the target serving cell, where the handover indication signaling may be indicated by DCI carried on the scheduling serving cell, or may be indicated by dedicated DCI carried on the first serving cell, where the first serving cell is a serving cell with frequent monitoring of the PDCCH or is a PCell. For example, if the target serving cell supports and configures cross-carrier scheduling, the handover indication signaling may be transmitted or indicated through DCI transmitted on the scheduling serving cell for scheduling the target serving cell; if the target serving cell is not configured with cross-carrier scheduling, a handover indication signaling may be sent or indicated over dedicated DCI on the first serving cell; alternatively, if the target serving cell supports and configures cross-carrier scheduling, the DCI transmitted on the scheduling serving cell for scheduling the target serving cell and the dedicated DCI on the first serving cell may each contain handover indication signaling, thereby indicating that the terminal completes BWP handover.

According to the switching method of the embodiment, the service node sends the switching indication signaling to the terminal so as to indicate the terminal to perform BWP switching on the target service cell, and whether the target service cell is configured with cross-carrier scheduling or not, the rapid BWP switching can be realized, and the communication efficiency and reliability are improved.

In an embodiment, the period parameters corresponding to the first BWP and the second BWP are different;

the cycle parameter includes at least one of: a monitoring period of the PDCCH and a transmission period of the CSI-RS.

The period parameter corresponding to the first BWP is larger than the period parameter corresponding to the second BWP; or,

the first BWP is configured to not monitor the PDCCH, and the second BWP is configured to monitor the PDCCH.

In an embodiment, in a case that the target serving cell includes a serving cell configured to be scheduled across carriers, the handover indication signaling is downlink control information sent on the scheduling serving cell;

the downlink control information includes downlink control information for scheduling downlink transmission and downlink control information for scheduling uplink transmission.

In an embodiment, in a case where the downlink control information is used for scheduling downlink transmission, the second BWP is a BWP indicated by a BWP control field of the downlink control information; or,

in the case that the downlink control information is used for scheduling downlink transmission, the second BWP is a set BWP, where the set BWP is a BWP where the target serving cell is located before entering the first BWP or a BWP where a period parameter configured for the target serving cell is the smallest.

In an embodiment, in a case where the downlink control information is used for scheduling downlink transmission, the handover indication signaling is indicated by an added control domain of the downlink control information, where the added control domain is a 1-bit control domain.

In an embodiment, in a case that the value of the new added control field is 1, the downlink control information is used to indicate a regular downlink transmission, the carrier index indication field CIF of the downlink control information is used to indicate a target serving cell that is scheduled across carriers, and the BWP control field of the downlink control information is used to indicate the second BWP;

and under the condition that the value of the newly added control domain is 0, the downlink control information is used for indicating that the first BWP is switched to the second BWP in the target serving cell and is used for indicating that no downlink transmission exists.

In an embodiment, the target serving cell is determined according to a CIF control field of the downlink control information;

the second BWP is a BWP indicated by the BWP control field of the downlink control information, or the second BWP is a set BWP, where the set BWP is a BWP where the target serving cell is located before entering the first BWP or a BWP where a period parameter configured for the target serving cell is the smallest;

The corresponding relation between the CIF control domain and the auxiliary service cell or the auxiliary service cell group is configured by a high layer or is determined according to a first preset mapping relation.

In an embodiment, in a case that the downlink control information is used for scheduling uplink transmission, the handover indication signaling is indicated by an uplink shared channel control field and a preset control field of the downlink control information.

In an embodiment, the preset control domain includes a CSI request domain;

and under the condition that the value of the uplink shared channel indication domain is a preset value and the value of the CSI request domain is 0, the downlink control information is used for indicating the switching from the first BWP to the second BWP in the target service cell.

In an embodiment, the preset control domain includes a CSI request domain;

and under the conditions that the value of the uplink shared channel indication domain is a preset value, the value of the CSI request domain is larger than 0, the CSI request domain triggers the sending of the aperiodic CSI-RS, and the CSI request domain does not trigger the reporting of the CSI report, the downlink control information is used for indicating the switching from the first BWP to the second BWP in the target serving cell.

In an embodiment, the target serving cell is determined according to a CIF control field of the downlink control information; the second BWP is a BWP indicated by the BWP control field of the downlink control information, or the second BWP is a set BWP, where the set BWP is a BWP where the target serving cell is located before entering the first BWP or a BWP where a period parameter configured for the target serving cell is the smallest; the corresponding relation between the CIF control domain and the auxiliary service cell or the auxiliary service cell group is configured by a high layer or is determined according to a second preset mapping relation.

In an embodiment, the preset control domain includes a CSI request domain;

when the value of the uplink shared channel indication field is a preset value, the value of the CSI request field is greater than 0, the CSI request field triggers transmission of a cross-carrier aperiodic CSI-RS, and a target serving cell where the cross-carrier aperiodic CSI-RS is located is in a first BWP, the downlink control information is used to indicate handover from the first BWP to a second BWP in the target serving cell;

the aperiodic CSI-RS is transmitted through the first BWP or the second BWP.

In an embodiment, the value of the uplink shared channel indication field includes a first preset value and a second preset value, where CSI trigger state configuration information corresponding to the first preset value is different from CSI trigger state configuration information corresponding to the second preset value.

In an embodiment, the first serving cell is a serving cell on BWP operating on a PDCCH with a monitoring period smaller than a set threshold; or, the first serving cell is a primary serving cell.

In an embodiment, the dedicated downlink control information includes at least two control domains;

Each control field contains 1 bit or 2 bits;

each control domain corresponds to a secondary cell or group of secondary cells other than the first serving cell and not configured for cross-carrier scheduling.

In an embodiment, the correspondence between each control domain and the secondary serving cell or secondary serving cell group is configured by a higher layer or determined according to a third preset mapping relationship.

In an embodiment, in case each control field contains 1 bit, the value of the 1 bit is 0 or 1;

the target service cell comprises an auxiliary service cell or an auxiliary service cell group corresponding to a control domain with a value of 1;

the second BWP is the BWP where the secondary serving cell or secondary serving cell group is located before entering the first BWP or the BWP where the periodic parameter configured for the target serving cell is the smallest.

In an embodiment, in a case that the target serving cell includes a secondary serving cell or a secondary serving cell group configured for cross-carrier scheduling, the handover indication signaling indicates by at least one of downlink control information of the scheduling target serving cell and dedicated downlink control information corresponding to the first serving cell.

In an embodiment, in a case where the handover indication signaling is indicated by the downlink control information and the dedicated downlink control information, the performing, according to the handover indication signaling, handover from the first BWP to the second BWP in the target serving cell includes:

under the condition that the downlink control information is received firstly and then the special downlink control information is received, switching from a first BWP to a second BWP is carried out in a target service cell according to the downlink control information and the special downlink control information, or switching from the first BWP to the second BWP is carried out in the target service cell according to the downlink control information;

under the condition that the downlink control information and the special downlink control information are received simultaneously, switching from a first BWP to a second BWP is carried out in a target service cell according to the downlink control information;

and under the condition that the special downlink control information is received before and after the downlink control information is received, switching from the first BWP to the second BWP in the target serving cell according to the special downlink control information and the downlink control information respectively.

According to the switching indication method, the target service cell can support and is configured to cross-carrier scheduling, or can not support or is not configured to cross-carrier scheduling, through setting a perfect switching indication mechanism, the service node sends DCI and/or special DCI to the terminal so as to send switching indication signaling to indicate the terminal to perform BWP switching on the target service cell, whether the target service cell is configured to cross-carrier scheduling or not, the BWP can be rapidly switched, and the target service cell can be rapidly operated in conventional BWP under the condition of a large number of service demands, so that the communication efficiency and reliability are improved.

The embodiment of the application also provides a switching device. Fig. 4 is a schematic structural diagram of a switching device according to an embodiment. As shown in fig. 4, the switching device includes: a receiving module 310 and a switching module 320.

A receiving module 310 configured to receive the handover indication signaling;

a switching module 320 is configured to switch from the first BWP to the second BWP in the target serving cell according to the switching indication signaling.

According to the switching device of the embodiment, the switching instruction signaling is received, and the BWP switching of the target service cell is completed according to the switching instruction signaling, so that the target service cell can rapidly work in the conventional BWP, a large number of service requirements can be met, and the communication efficiency is improved.

the cycle parameter includes at least one of:

a monitoring period of the PDCCH and a transmission period of the CSI-RS.

In an embodiment, the preset control domain includes a CSI request domain;

The aperiodic CSI-RS is transmitted through the first BWP or the second BWP.

In an embodiment, the value of the uplink shared channel indication field includes a first preset value and a second preset value, where trigger state configuration information corresponding to the first preset value is different from trigger state configuration information corresponding to the second preset value.

In an embodiment, the first serving cell is a serving cell in which a monitoring period of the PDCCH is smaller than a set threshold; or, the first serving cell is a primary serving cell.

each control field contains 1 bit or 2 bits;

The switching device according to the present embodiment and the switching method according to the foregoing embodiments belong to the same inventive concept, and technical details not described in detail in the present embodiment can be found in any of the foregoing embodiments, and the present embodiment has the same advantages as those of executing the switching method.

The embodiment of the application also provides a switching indicating device. Fig. 5 is a schematic structural diagram of a switching indication device according to an embodiment. As shown in fig. 5, the switching device includes: a signaling determination module 410 and a transmission module 420.

A signaling determining module 410 configured to determine a handover indication signaling, where the handover indication signaling is used to instruct the terminal to perform a BWP to second BWP handover in the target serving cell;

a sending module 420, configured to send the handover indication signaling.

According to the switching indicating device of the embodiment, the terminal is indicated to complete the rapid switching of the BWP in the target service cell by sending the switching indicating signaling, so that the target service cell works in the second BWP to meet a large number of service demands, and the communication efficiency is improved.

In an embodiment, the preset control domain includes a CSI request domain;

the aperiodic CSI-RS is transmitted through the first BWP or the second BWP.

each control field contains 1 bit or 2 bits;

The embodiment of the application also provides a terminal. The switching method may be performed by a switching device which may be implemented in software and/or hardware and integrated in the terminal.

Fig. 6 is a schematic structural diagram of a communication node according to an embodiment. As shown in fig. 6, a communication node provided in this embodiment includes: a processor 510 and a storage device 520. The processor in the communication node may be one or more, for example a processor 510 in fig. 6, and the processor 510 and the memory means 520 in the device may be connected by a bus or otherwise, for example by a bus connection in fig. 6.

The one or more programs are executed by the one or more processors 510 to cause the one or more processors to implement the handoff method described in any of the embodiments above.

The storage device 520 in the communication node is used as a computer readable storage medium, and may be used to store one or more programs, such as a software program, a computer executable program, and a module, such as program instructions/modules corresponding to the handover method in the embodiment of the present invention (for example, the module in the handover device shown in fig. 4 includes the receiving module 310 and the handover module 320). The processor 510 executes various functional applications of the communication node and data processing, i.e. implements the handover method in the above-described method embodiments, by running software programs, instructions and modules stored in the storage 520.

The storage device 520 mainly includes a storage program area and a storage data area, wherein the storage program area can store an operating system, at least one application program required by functions; the storage data area may store data created according to the use of the device, etc. (e.g., handover indication signaling, target serving cell, etc. in the above embodiments). In addition, storage 520 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some examples, storage 520 may further include memory located remotely from processor 510, which may be connected to the communication node via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

And, when one or more programs included in the above-mentioned communication node are executed by the one or more processors 510, the following operations are implemented: receiving a switching indication signaling; and switching the first bandwidth part BWP to the second BWP in the target serving cell according to the switching indication signaling.

The communication node according to the present embodiment and the handover method according to the foregoing embodiments belong to the same inventive concept, and technical details not described in detail in the present embodiment can be found in any of the foregoing embodiments, and the present embodiment has the same advantages as those of performing the handover method.

The embodiment of the application also provides a service node. The handover indication method may be performed by a handover device, which may be implemented in software and/or hardware and integrated in the service node.

Fig. 7 is a schematic structural diagram of a service node according to an embodiment. As shown in fig. 7, a service node provided in this embodiment includes: a processor 610 and a storage 620. The processor in the service node may be one or more, for example a processor 610 in fig. 7, and the processor 610 and the storage 620 in the device may be connected by a bus or otherwise, for example by a bus connection in fig. 7.

The one or more programs are executed by the one or more processors 610 to cause the one or more processors to implement the handoff direction method described in any of the embodiments above.

The storage 620 in the service node is used as a computer readable storage medium, and may be used to store one or more programs, such as a software program, a computer executable program, and a module, such as program instructions/modules corresponding to the handover indication method in the embodiment of the present invention (for example, the modules in the handover indication apparatus shown in fig. 5 include a signaling determining module 410 and a sending module 420). The processor 610 executes various functional applications of the service node and data processing by running software programs, instructions and modules stored in the storage 620, i.e. implements the handover indication method in the above-described method embodiments.

The storage device 620 mainly includes a storage program area and a storage data area, wherein the storage program area can store an operating system and at least one application program required by functions; the storage data area may store data created according to the use of the device, etc. (e.g., handover indication signaling, target serving cell, etc. in the above embodiments). In addition, storage 620 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some examples, storage 620 may further include memory remotely located with respect to processor 610, which may be connected to the service node through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

And, when one or more programs included in the service node are executed by the one or more processors 610, the following operations are implemented: determining a switching indication signaling, wherein the switching indication signaling is used for indicating the terminal to switch from a first BWP to a second BWP in a target service cell; and sending the switching indication signaling.

The service node provided in this embodiment and the handover indication method provided in the foregoing embodiment belong to the same inventive concept, and technical details not described in detail in this embodiment can be found in any of the foregoing embodiments, and this embodiment has the same advantages as those of executing the handover indication method.

The present embodiments also provide a storage medium containing computer-executable instructions that, when executed by a computer processor, are used to perform a handover method or a handover indication method.

From the above description of embodiments, those skilled in the art will appreciate that the present application may be implemented by software and general purpose hardware, or may be implemented by hardware. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, where the computer software product may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk, or an optical disk of a computer, where the computer software product includes a plurality of instructions to cause a computer device (which may be a personal computer, a server, or a network device) to perform a handover method or a handover instruction method according to any embodiment of the present application.

The foregoing is merely exemplary embodiments of the present application and is not intended to limit the scope of the present application.

The block diagrams of any logic flow in the figures of this application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored on a memory. The memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, read Only Memory (ROM), random Access Memory (RAM), optical storage devices and systems (digital versatile disk DVD or CD optical disk), etc. The computer readable medium may include a non-transitory storage medium. The data processor may be of any type suitable to the local technical environment, such as, but not limited to, general purpose computers, special purpose computers, microprocessors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), programmable logic devices (FGPAs), and processors based on a multi-core processor architecture.

By way of exemplary and non-limiting example, a detailed description of exemplary embodiments of the present application has been provided above. Various modifications and adaptations to the above embodiments may become apparent to those skilled in the art without departing from the scope of the invention, which is defined in the accompanying drawings and claims. Accordingly, the proper scope of the invention is to be determined according to the claims.

Claims

1. A method of handover, comprising:

receiving a switching indication signaling;

switching from the first bandwidth part BWP to the second BWP in the target service cell according to the switching indication signaling;

the switching indication signaling comprises downlink control information;

the downlink control information comprises downlink control information for scheduling downlink transmission and downlink control information for scheduling uplink transmission;

when the downlink control information is used for scheduling downlink transmission, the switching indication signaling is indicated by a new control domain of the downlink control information, wherein the new control domain is a 1-bit control domain;

the downlink control information is used for indicating a conventional downlink transmission when the value of the newly added control domain is 1, the carrier index indication domain CIF of the downlink control information is used for indicating a target serving cell to be cross-carrier scheduled, and the BWP control domain of the downlink control information is used for indicating the second BWP;

2. The method according to claim 1, wherein the cycle parameters corresponding to the first BWP and the second BWP are different;

the cycle parameter includes at least one of: a monitoring period of a physical downlink control channel PDCCH and a transmission period of a channel state information reference signal CSI-RS.

3. The method according to claim 2, wherein the first BWP corresponds to a larger cycle parameter than the second BWP corresponds to a cycle parameter; or,

4. The method of claim 1, wherein the handover indication signaling is downlink control information sent on a scheduling serving cell in the case where the target serving cell includes a serving cell configured for cross-carrier scheduling.

5. The method according to claim 4, wherein the second BWP is a BWP indicated by a BWP control field of the downlink control information, in case the downlink control information is used for scheduling downlink transmissions; or,

6. The method of claim 1, wherein the target serving cell is determined according to a CIF control field of the downlink control information;

7. The method of claim 1, wherein the handover indication signaling is indicated by an uplink shared channel control field and a preset control field of the downlink control information in case the downlink control information is used for scheduling uplink transmission.

8. The method according to claim 7, wherein the preset control domain comprises a channel state information, CSI, request domain;

9. The method of claim 7, wherein the preset control domain comprises a CSI request domain;

10. The method of claim 7, wherein the target serving cell is determined according to a CIF control field of the downlink control information;

the corresponding relation between the CIF control domain and the auxiliary service cell or the auxiliary service cell group is configured by a high layer or is determined according to a second preset mapping relation.

11. The method of claim 7, wherein the preset control domain comprises a CSI request domain;

the aperiodic CSI-RS is transmitted through the first BWP or the second BWP.

12. The method of claim 7, wherein the step of determining the position of the probe is performed,

the value of the uplink shared channel indication domain comprises a first preset value and a second preset value, and the CSI trigger state configuration information corresponding to the first preset value is different from the CSI trigger state configuration information corresponding to the second preset value.

13. The method of claim 1, wherein the handover indication signaling is indicated by dedicated downlink control information corresponding to the first serving cell.

14. The method of claim 13, wherein the first serving cell is a serving cell operating in a PDCCH with a monitoring period less than a set threshold; or, the first serving cell is a primary serving cell.

15. The method of claim 13, wherein the dedicated downlink control information comprises at least two control domains;

each control field contains 1 bit or 2 bits;

16. The method of claim 15, wherein the correspondence between each control domain and the secondary serving cell or secondary serving cell group is configured by a higher layer or determined according to a third preset mapping.

17. The method according to claim 15, wherein in case each control field contains 1 bit, the value of 1 bit is 0 or 1;

18. The method of claim 15, wherein in the case where each control field contains 2 bits, the value of each control field corresponds to one BWP index.

19. The method of claim 1, wherein the handover indication signaling is indicated by at least one of downlink control information of a scheduling target serving cell and dedicated downlink control information corresponding to a first serving cell in a case where the target serving cell includes a secondary serving cell or a secondary serving cell group configured for cross-carrier scheduling.

20. The method according to claim 19, wherein, in case the handover indication signaling is indicated by the downlink control information and the dedicated downlink control information, the performing the handover from the first BWP to the second BWP in the target serving cell according to the handover indication signaling comprises:

21. A handover indication method, comprising:

transmitting the switching indication signaling;

the switching indication signaling comprises downlink control information;

22. A switching device, comprising:

a receiving module configured to receive a handover indication signaling;

a switching module configured to switch from the first BWP to the second BWP in the target serving cell according to the switching indication signaling;

the switching indication signaling comprises downlink control information;

23. A switching indication device, comprising:

a signaling determining module, configured to determine a handover indication signaling, where the handover indication signaling is used to instruct the terminal to perform a BWP-to-second BWP handover in the target serving cell;

a transmitting module configured to transmit the handover indication signaling;

the switching indication signaling comprises downlink control information;

24. A terminal, comprising:

one or more processors;

a storage means for storing one or more programs;

the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the handover method of any of claims 1-20.

25. A service node, comprising:

one or more processors;

a storage means for storing one or more programs;

the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the handoff direction method of claim 21.

26. A computer readable storage medium having stored thereon a computer program, which when executed by a processor implements the handover method of any of claims 1-20 or the handover indication method of claim 21.