CN109474401B - Method, device, base station and user equipment for issuing and monitoring preemption indication - Google Patents
Method, device, base station and user equipment for issuing and monitoring preemption indication Download PDFInfo
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Abstract
The invention provides a method, a device, a base station and user equipment for issuing and monitoring a preemption indication. On the base station side, the method comprises: configuring a common search space for monitoring a preemption indication on a BWP (broadband access point) for a UE according to the frequency domain range relation between the BWP configured for the UE and a reference resource; and in a monitoring period of the preemption indication, when the downlink data sent to the user on the reference resource is preempted by other downlink data, selecting a corresponding mode to send the preemption indication to the UE according to whether the activated BWP at the current moment is configured with a common search space for monitoring the preemption indication. On the UE side, the method comprises: determining whether the base station configures a common search space for listening for the camping indication for BWP; and selecting a corresponding mode to listen for the preemption indication according to whether the activated BWP at the current moment is configured with a common search space for listening for the preemption indication. The invention can save user resources.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method, an apparatus, a base station, and a user equipment for issuing and monitoring a preemption indication.
Background
In 5G communication services, in order to improve resource utilization, UEs (User equipments) with different data transmission durations may multiplex the same time-frequency physical resource, that is, in order to meet the low delay requirement of the short-duration UEs, a base station may schedule the short-duration UEs on the physical resource of the scheduled long-duration UEs, so that the short-duration UEs occupy the resource of the long-duration UEs by force, resulting in that part of data of the long-duration UEs is damaged.
When Resource Preemption occurs, the base station may send a Preemption Indication (Preemption Indication) to the UE through a group common DCI (group common downlink Control information), and the UE needs to monitor the Preemption Indication and configure by an RRC (Radio Resource Control) signaling. The content of the preemption indication is a time-frequency range of a preemption Resource (Preempted Resource) in a preemption indication monitoring period.
On the other hand, to meet the capability and service requirements of 5G different UEs, a BWP (Bandwidth Part) concept is introduced, and one UE configures one or more BWPs semi-statically. The UE determines whether to monitor the camping indication through configuration of the base station RRC signaling, and when the configuration indication is monitoring, the UE needs to monitor on all active BWPs: at a given time, when there is only one active BWP and it does not contain a common search space, the UE cannot acquire a preemption indication even if the downlink data received by the UE on that BWP is preempted by other UEs. When there are multiple BWPs activated at a given time, the UE needs to listen for the preemption indication for each activated BWP, regardless of whether it is likely to have resource preemption, which results in wasted user resources.
Disclosure of Invention
The method, the device, the base station and the user equipment for issuing and monitoring the preemption indication can save user resources.
In a first aspect, the present invention provides a method for issuing a preemption indication, which is applied to a base station, and comprises:
configuring a common search space for monitoring a preemption indication on a BWP (broadband access point) for a UE according to the frequency domain range relation between the BWP configured for the UE and a reference resource;
and in a monitoring period of the preemption indication, when the downlink data sent to the user on the reference resource is preempted by other downlink data, selecting a corresponding mode to send the preemption indication to the UE according to whether the activated BWP at the current moment is configured with a common search space for monitoring the preemption indication.
Optionally, the configuring, according to a frequency-domain range relationship between a reference resource and a BWP configured for the UE, a common search space for listening for the camping indication on the BWP for the UE includes: when the BWP configured for the UE is partially overlapped or completely overlapped with the frequency domain range of the reference resource, configuring a common search space for monitoring the preemption indication on the BWP for the UE, otherwise not configuring the common search space for monitoring the preemption indication on the BWP for the UE.
Optionally, the selecting a corresponding manner to send the preemption indication to the UE according to whether the BWP activated at the current time is configured with the common search space for listening to the preemption indication includes:
if one or more activated BWPs at the current moment are not configured with a public search space for monitoring the preemption indication, not sending the preemption indication to the UE;
if only one activated BWP is configured with a common search space for monitoring the preemption indication at the current moment, sending the preemption indication to UE in the common search space of the activated BWP;
and if a plurality of activated BWPs are configured with the common search space for monitoring the preemption indication at the current moment, sending the preemption indication to the UE in the common search space of at least one BWP in the activated BWPs.
Optionally, the sending a preemption indication to the UE in the common search space of at least one of the plurality of activated BWPs comprises:
sending a preemption indication to a UE in a common search space of a partial BWP of the plurality of activated BWPs, wherein the UE is instructed to listen for the preemption indication only in the common search space of the partial BWP while the BWP is activated; or,
sending a preemption indication to the UE in a common search space of the plurality of activated BWPs.
In a second aspect, the present invention provides a method for monitoring a preemption indication, which is applied to a user equipment, and the method includes:
determining whether the base station configures a common search space for listening for the camping indication for BWP;
and selecting a corresponding mode to listen for the preemption indication according to whether the activated BWP at the current moment is configured with a common search space for listening for the preemption indication.
Optionally, the selecting a corresponding mode to listen for the preemption indication according to whether the BWP activated at the current time is configured with a common search space for listening for the preemption indication includes:
if one or more activated BWPs at the current moment are not configured with a public search space for monitoring the preemption indication, not monitoring the preemption indication;
if only one activated BWP is configured with a common search space for monitoring the preemption indication at the current moment, monitoring the preemption indication in the common search space of the activated BWP;
and if a plurality of activated BWPs are configured with the common search space for monitoring the preemption indication at the current moment, monitoring the preemption indication in the common search space of at least one BWP in the activated BWPs.
Optionally, the listening for the common search space of the at least one BWP of the plurality of activated BWPs comprises:
if the base station indicates that the camping indication is listened in the common search space of only a part of the BWPs in the activated BWPs while activating the BWPs, the base station listens in the common search space of the part of the BWPs for the camping indication;
and if the base station does not indicate the interception preemption indication of the common search space of which activated BWP while activating the BWP, the base station listens the interception preemption indication in the common search spaces of the activated BWPs.
In a third aspect, the present invention provides an apparatus for issuing a preemption indication, where the apparatus is located in a base station, and the apparatus includes:
a configuration unit, configured to configure, according to a frequency domain range relationship between a BWP configured for a UE and a reference resource, a common search space on the BWP for listening to a preemption indication;
and the issuing unit is used for selecting a corresponding mode to send the preemption indication to the UE according to whether the activated BWP at the current moment is configured with a common search space for monitoring the preemption indication or not when the downlink data sent to the user on the reference resource is preempted by other downlink data in a monitoring period of the preemption indication.
Optionally, the configuring unit is configured to configure, when a BWP configured for the UE partially overlaps or completely overlaps with a frequency domain range of the reference resource, a common search space for listening to the preemption indication on the BWP for the UE, and otherwise, not configure, on the BWP, the common search space for listening to the preemption indication for the UE.
Optionally, the issuing unit is configured to not send the preemption indication to the UE when one or more BWPs activated at the current time are not configured with the common search space for monitoring the preemption indication; when only one activated BWP is configured with a common search space for monitoring a preemption indication at the current moment, sending the preemption indication to UE in the common search space of the activated BWP; and when a plurality of activated BWPs are configured with a common search space for listening for the camping indication at the current moment, transmitting the camping indication to the UE in the common search space of at least one BWP of the activated BWPs.
Optionally, if a plurality of activated BWPs are configured with a common search space for listening to the preemption indication at the current time, the issuing unit is configured to send the preemption indication to the UE in the common search space of a part of the activated BWPs, where the UE is instructed to listen to the preemption indication only in the common search space of the part of the BWPs while the BWPs are activated; alternatively, a camping indication is sent to the UE in a common search space of the plurality of activated BWPs.
In a fourth aspect, the present invention provides an apparatus for monitoring a camping indicator, where the apparatus is located in a user equipment, and the apparatus includes:
a determining unit, configured to determine whether the base station configures a common search space for the BWP for listening to the camping indication;
and the monitoring unit is used for selecting a corresponding mode to monitor the preemption indication according to whether the activated BWP at the current moment is configured with a common search space for monitoring the preemption indication.
Optionally, the listening unit is configured to not listen for the camping indication when the one or more BWPs activated at the current time are not configured to listen for the common search space for the camping indication; when only one activated BWP is configured with a common search space for monitoring a preemption indication at the current moment, monitoring the preemption indication in the common search space of the activated BWP; and when a plurality of activated BWPs are configured with a common search space for listening for a camping indication at the current moment, listening for the camping indication in the common search space of at least one BWP of the plurality of activated BWPs.
Optionally, if a plurality of activated BWPs are configured with a common search space for listening the camping indication at the current time, the listening unit is configured to listen to the camping indication in the common search space of a part of the BWPs when the base station indicates that the camping indication is listened only in the common search space of the part of the BWPs while activating the BWPs; when the base station does not indicate which activated BWP common search space to listen for the preemption indication while activating BWP, listening for the preemption indication in the common search spaces of the activated BWPs.
In a fifth aspect, the present invention provides a base station, where the base station includes the apparatus for issuing the camping indicator.
In a sixth aspect, the present invention provides a ue, where the ue includes the above apparatus for monitoring a camping indicator.
In the method, the apparatus, the base station and the user equipment for issuing and monitoring the preemption indication provided by the embodiment of the present invention, the UE determines whether to monitor the preemption indication on the activated BWP according to whether the base station configures a common search space for monitoring the preemption indication on the BWP, when the base station is not configured, downlink data transmission on the BWP is not preempted by other UEs, and the UE does not need to monitor; when the base station is configured, the downlink data transmission on the BWP may be preempted by other UEs, and the UE monitors the preemption indication according to the indication of the base station, so as to save user resources.
Drawings
Fig. 1 is a flowchart of a method for issuing a preemption indication in accordance with an embodiment of the present invention;
FIG. 2 is a flowchart of a method for monitoring a preemption indication in accordance with another embodiment of the present invention;
FIG. 3 is a diagram illustrating a method for issuing and monitoring a preemption indication in accordance with yet another embodiment of the present invention;
FIG. 4 is a diagram illustrating a method for issuing and monitoring a preemption indication in accordance with yet another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a device for issuing a preemption indication according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an apparatus for monitoring a preemption indication according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a method for issuing a preemption indication, where the method is applied to a base station, and as shown in fig. 1, the method includes:
s11, the base station configures the UE for listening the common search space of the preemption indication on the BWP according to the frequency domain range relationship between the BWP configured for the UE and the Reference Resource (Reference Resource).
Specifically, when the BWP configured by the base station for the UE partially overlaps or completely overlaps with the frequency domain range of the reference resource, a common search space for listening to the preemption indication is configured on the BWP for the UE, otherwise, the common search space for listening to the preemption indication is not configured on the BWP for the UE.
The reference resource refers to a time-frequency range in which resource preemption is likely to occur in one listening period of the preemption indication.
S12, in a monitoring period of the preemption indication, when the downlink data sent to the user on the reference resource is preempted by other downlink data, the base station selects a corresponding mode to send the preemption indication to the UE according to whether the activated BWP at the current moment is configured with a common search space for monitoring the preemption indication.
Specifically, the base station may select to send the camping indication to the UE according to the following three cases:
case 1: if one or more activated BWPs at the current moment are not configured with a public search space for monitoring the preemption indication, the base station does not send the preemption indication to the UE;
case 2: if only one activated BWP is configured with a public search space for monitoring the preemption indication at the current moment, the base station sends the preemption indication to the UE in the public search space of the activated BWP;
case 3: if a plurality of activated BWPs are configured with a common search space for monitoring the preemption indication at the current moment, the base station sends the preemption indication to the UE in the common search space of at least one BWP in the plurality of activated BWPs.
Further, for case 3, the base station may send a preemption indication to the UE in a common search space of a partial BWP of the plurality of activated BWPs, wherein the base station instructs the UE to listen for the preemption indication only in the common search space of the partial BWP while activating BWP; or, the base station sends the preemption indication to the UE in the common search space of the activated BWPs.
In the method for issuing the preemption indication provided by the embodiment of the present invention, if one or more activated BWPs are not configured with a common search space for monitoring the preemption indication, downlink data transmission on the one or more BWPs is not preempted by other UEs, and the base station does not send the preemption indication to the UE; if only one activated BWP is configured with a common search space for monitoring the preemption indication at the current moment, the downlink data transmission on the BWP may be preempted by other UE, and the base station sends the preemption indication to the UE in the common search space of the activated BWP; if a plurality of activated BWPs are configured with the common search space for listening for the camping indication at the current time, and downlink data transmission on the BWPs may be camped by other UEs, the base station camps the camping indication below the UE in the common search space of one or more activated BWPs and indicates the UE in which common search space of the activated BWPs to listen for the camping indication, so as to save user resources.
An embodiment of the present invention provides a method for monitoring a preemption indication, where the method is applied to a UE, and as shown in fig. 2, the method includes:
s21, the UE determines whether the base station configures a common search space for listening for the camping indication for BWP.
S22, the UE selects a corresponding mode to monitor the preemption indication according to whether the activated BWP is configured with a common search space for monitoring the preemption indication at the current moment.
Specifically, the UE may select to monitor the camping indicator according to the following three cases:
case 1: if one or more activated BWPs at the current moment are not configured with a public search space for monitoring the preemption indication, the UE does not monitor the preemption indication;
case 2: if only one activated BWP is configured with a public search space for monitoring the preemption indication at the current moment, the UE monitors the preemption indication in the public search space of the activated BWP;
case 3: if a plurality of activated BWPs are configured with the common search space for listening the camping indication at the current time, the UE listens the camping indication in the common search space of at least one of the activated BWPs.
Further, for case 3, if the bs indicates the camping indication for listening in the common search space of only a part of BWPs in the activated BWPs while activating BWPs, the UE listens in the common search space of the part of BWPs for the camping indication; if the base station does not indicate which activated BWP common search space to listen for the camping indication while activating the BWP, the UE listens for the camping indication in all the activated BWP common search spaces.
In the method for monitoring the preemption indication provided by the embodiment of the present invention, the UE determines whether to monitor the preemption indication on the BWP according to whether the base station configures a common search space for monitoring the preemption indication on the active BWP, when the base station is not configured, downlink data transmission on the BWP is not preempted by other UEs, and the UE does not need to monitor; when the base station is configured, the downlink data transmission on the BWP may be preempted by other UEs, and the UE monitors the preemption indication according to the indication of the base station, so as to save user resources.
The method for monitoring the preemption indication according to the present invention is described in detail with reference to the following embodiments.
As shown in fig. 3, the bs configures three BWPs for UE1, where the parameter set (numerology) of each BWP is different, BWP1 does not overlap with the reference resource, BWP2 partially overlaps with the reference resource, BWP3 completely overlaps with the reference resource, the bs configures a common search space for listening to the camping indicator on BWP2 and BWP3 for UE1, and UE1 listens to the camping indicator on BWP2 and BWP 3. At time T1, only BWP1 is in the activated state, and therefore UE1 does not listen for the preemption indication. At time T2, only BWP2 is in the activated state, and UE1 listens for the preemption indication only in the common search space contained in BWP 2. When the downlink data received by the UE1 is preempted by other UEs, the base station only sends the preemption indication in the common search space included in BWP2, and the UE1 only listens and blindly detects the preemption indication sent by the base station in the common search space of BWP2, so as to obtain the information of the preempted resources for assisting decoding of the received downlink data. Likewise, at time T3, only BWP3 is in an activated state, and UE1 listens for a preemption indication only in the common search space contained in BWP 3. When the downlink data received by the UE1 is preempted by other UEs, the base station only sends the preemption indication in the common search space included in BWP3, and the UE1 only listens and blindly detects the preemption indication sent by the base station in the common search space of BWP3, so as to obtain the information of the preempted resources for assisting decoding of the received downlink data.
As shown in fig. 4, the base station configures three BWPs for the UE1, where the parameter set of each BWP is different, BWP1 does not overlap with the reference resource, BWP2 partially overlaps with the reference resource, BWP3 completely overlaps with the reference resource, the base station configures a common search space for listening to the preemption indication on BWP2 and BWP3 for the UE1, and the UE1 listens to the preemption indication on BWP2 and BWP 3. At time T1, only BWP1 is in the activated state, and therefore UE1 does not listen for the preemption indication. At time T2, BWP2 and BWP3 are simultaneously in the activated state. The base station may send a preemption indication to the UE1 in three ways:
mode 1: the base station, while activating BWP2 and BWP3, instructs UE1 to listen for the preemption indication only in the common search space contained in BWP 2. Therefore, when the downlink data received by the UE1 is dominated by other UEs, the base station only transmits the preemption indication in the common search space contained in BWP2, and the UE1 only listens in the common search space of BWP2 and blindly detects the preemption indication transmitted by the base station, thereby obtaining information of the dominated resources for assisting decoding of the received downlink data.
Mode 2: the base station, while activating BWP2 and BWP3, instructs UE1 to listen for the preemption indication only in the common search space contained in BWP 3. Therefore, when the downlink data received by the UE1 is dominated by other UEs, the base station only transmits the preemption indication in the common search space contained in BWP3, and the UE1 only listens in the common search space of BWP3 and blindly detects the preemption indication transmitted by the base station, thereby obtaining information of the dominated resources for assisting decoding of the received downlink data.
Mode 3: the base station, when activating BWP2 and BWP3, has no indication of the BWP identity containing the common search space that UE1 should listen to. Therefore, when the downlink data received by the UE1 is preempted by other UEs, the base station will send the preemption indication in the common search spaces contained in BWP2 and BWP3, and the UE1 will listen to and blindly detect the preemption indication sent by the base station in the common search spaces contained in BWP2 and BWP3, so as to obtain the information of the preempted resources for assisting in decoding the received downlink data.
An embodiment of the present invention provides a device for issuing a preemption indication, where the device is located in a base station, and as shown in fig. 5, the device includes:
a configuration unit 11, configured to configure, according to a frequency domain range relationship between a BWP configured for a UE and a reference resource, a common search space on the BWP for listening to a preemption indication for the UE;
and the issuing unit 12 is configured to, in a monitoring period of the preemption indication, select a corresponding mode to send the preemption indication to the UE according to whether the activated BWP at the current time is configured with a common search space for monitoring the preemption indication when downlink data sent to the user on the reference resource is preempted by other downlink data.
Optionally, the configuring unit 11 is configured to configure, when a BWP configured for the UE partially overlaps or completely overlaps with a frequency domain range of the reference resource, a common search space for listening to the preemption indication on the BWP for the UE, and otherwise, not configure, on the BWP, the common search space for listening to the preemption indication for the UE.
Optionally, the issuing unit 12 is configured to not send the preemption indication to the UE when one or more BWPs activated at the current time are not configured with the common search space for monitoring the preemption indication; when only one activated BWP is configured with a common search space for monitoring a preemption indication at the current moment, sending the preemption indication to UE in the common search space of the activated BWP; and when a plurality of activated BWPs are configured with a common search space for listening for the camping indication at the current moment, transmitting the camping indication to the UE in the common search space of at least one BWP of the activated BWPs.
Optionally, if a plurality of activated BWPs are configured with a common search space for listening to the camping indication at the current time, the issuing unit 12 is configured to send the camping indication to the UE in the common search space of a part of the activated BWPs, where the UE is instructed to listen to the camping indication only in the common search space of the part of the BWPs while activating the BWPs; alternatively, a camping indication is sent to the UE in a common search space of the plurality of activated BWPs.
In the apparatus for issuing the preemption indication provided in the embodiment of the present invention, if one or more BWPs activated at the current time are not configured with a common search space for monitoring the preemption indication, downlink data transmission on the one or more BWPs is not preempted by other UEs, and the base station does not send the preemption indication to the UE; if only one activated BWP is configured with a common search space for monitoring the preemption indication at the current moment, the downlink data transmission on the BWP may be preempted by other UE, and the base station sends the preemption indication to the UE in the common search space of the activated BWP; if a plurality of activated BWPs are configured with the common search space for listening for the camping indication at the current time, and downlink data transmission on the BWPs may be camped by other UEs, the base station camps the camping indication below the UE in the common search space of one or more activated BWPs and indicates the UE in which common search space of the activated BWPs to listen for the camping indication, so as to save user resources.
The apparatus of this embodiment may be configured to implement the technical solution of the method embodiment for issuing the preemption indication, and the implementation principle and the technical effect are similar, which are not described herein again.
An embodiment of the present invention provides an apparatus for monitoring a preemption indication, where the apparatus is located in a user equipment, and as shown in fig. 6, the apparatus includes:
a determining unit 21, configured to determine whether the base station configures a common search space for listening to the camping indication for BWP;
the listening unit 22 is configured to select a corresponding mode to listen for the camping indication according to whether the BWP activated at the current time is configured with the common search space for listening for the camping indication.
Optionally, the listening unit 22 is configured to not listen for the camping indication when the one or more BWPs activated at the current time are not configured to listen to the common search space for the camping indication; when only one activated BWP is configured with a common search space for monitoring a preemption indication at the current moment, monitoring the preemption indication in the common search space of the activated BWP; and when a plurality of activated BWPs are configured with a common search space for listening for a camping indication at the current moment, listening for the camping indication in the common search space of at least one BWP of the plurality of activated BWPs.
Optionally, if a plurality of activated BWPs are configured with a common search space for listening camping indication at the current time, the listening unit 22 is configured to listen for camping indication in the common search space of a part of BWPs in the plurality of activated BWPs when the base station indicates that the camping indication is listened only in the common search space of the part of BWPs while activating BWPs; when the base station does not indicate which activated BWP common search space to listen for the preemption indication while activating BWP, listening for the preemption indication in the common search spaces of the activated BWPs.
In the apparatus for monitoring a preemption indication provided in the embodiment of the present invention, a UE determines whether to monitor a preemption indication on a BWP according to whether a base station configures a common search space for monitoring the preemption indication on the BWP activated by the base station, when the base station is not configured, downlink data transmission on the BWP is not preempted by other UEs, and the UE does not need to monitor; when the base station is configured, the downlink data transmission on the BWP may be preempted by other UEs, and the UE monitors the preemption indication according to the indication of the base station, so as to save user resources.
The apparatus of this embodiment may be configured to implement the technical solution of the method embodiment for monitoring a preemption indication, and the implementation principle and the technical effect are similar, which are not described herein again.
The embodiment of the invention also provides a base station which comprises the device for issuing the preemption indication.
The embodiment of the invention also provides the user equipment which comprises the device for monitoring the preemption indication.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method for issuing a preemption indication, the method being applied to a base station, characterized in that the method comprises:
configuring a common search space on a bandwidth part (BWP) for monitoring a preemption indication for a UE according to the frequency domain range relation between the BWP and a reference resource configured for the UE;
in a monitoring period of the preemption indication, when downlink data sent to a user on a reference resource is preempted by other downlink data, selecting a corresponding mode to send the preemption indication to the UE according to whether activated BWP at the current moment is configured with a common search space for monitoring the preemption indication;
the configuring, according to a frequency-domain range relationship between a reference resource and a BWP configured for the UE, a common search space on the BWP for listening for the camping indicator includes: when the BWP configured for the UE is partially overlapped or completely overlapped with the frequency domain range of the reference resource, configuring a common search space for monitoring the preemption indication on the BWP for the UE, otherwise not configuring the common search space for monitoring the preemption indication on the BWP for the UE;
the selecting a corresponding mode to send the preemption indication to the UE according to whether the activated BWP at the current time is configured with a common search space for listening to the preemption indication includes: if one or more activated BWPs at the current moment are not configured with a public search space for monitoring the preemption indication, not sending the preemption indication to the UE; if only one activated BWP is configured with a common search space for monitoring the preemption indication at the current moment, sending the preemption indication to UE in the common search space of the activated BWP; and if a plurality of activated BWPs are configured with the common search space for monitoring the preemption indication at the current moment, sending the preemption indication to the UE in the common search space of at least one BWP in the activated BWPs.
2. The method of claim 1, wherein sending a preemption indication to a UE in a common search space of at least one of the plurality of activated BWPs comprises:
sending a preemption indication to a UE in a common search space of a partial BWP of the plurality of activated BWPs, wherein the UE is instructed to listen for the preemption indication only in the common search space of the partial BWP while the BWP is activated; or,
sending a preemption indication to the UE in a common search space of the plurality of activated BWPs.
3. A method for monitoring a preemption indication, the method being applied to a user equipment, and the method comprising:
determining whether a base station configures a common search space for monitoring the preemption indication for the BWP, wherein when the BWP configured by the base station for the UE is partially overlapped or completely overlapped with the frequency domain range of the reference resource, the base station configures the common search space for monitoring the preemption indication for the UE on the BWP, otherwise, the base station does not configure the common search space for monitoring the preemption indication for the UE on the BWP;
selecting a corresponding mode to monitor the preemption indication according to whether the activated BWP at the current moment is configured with a common search space for monitoring the preemption indication;
the selecting a corresponding mode to listen for the preemption indication according to whether the activated BWP at the current moment is configured with a common search space for listening for the preemption indication comprises: if one or more activated BWPs at the current moment are not configured with a public search space for monitoring the preemption indication, not monitoring the preemption indication; if only one activated BWP is configured with a common search space for monitoring the preemption indication at the current moment, monitoring the preemption indication in the common search space of the activated BWP; and if a plurality of activated BWPs are configured with the common search space for monitoring the preemption indication at the current moment, monitoring the preemption indication in the common search space of at least one BWP in the activated BWPs.
4. The method according to claim 3, wherein said listening for a common search space of at least one of the plurality of activated BWPs to a preemption indication comprises:
if the base station indicates that the camping indication is listened in the common search space of only a part of the BWPs in the activated BWPs while activating the BWPs, the base station listens in the common search space of the part of the BWPs for the camping indication;
and if the base station does not indicate the interception preemption indication of the common search space of which activated BWP while activating the BWP, the base station listens the interception preemption indication in the common search spaces of the activated BWPs.
5. An apparatus for issuing a preemption indication, the apparatus being located at a base station, the apparatus comprising:
a configuration unit, configured to configure, according to a frequency domain range relationship between a BWP configured for a UE and a reference resource, a common search space on the BWP for listening to a preemption indication;
a sending unit, configured to select a corresponding mode to send the preemption indication to the UE according to whether the activated BWP at the current time is configured with a common search space for monitoring the preemption indication when downlink data sent to the user on the reference resource is preempted by other downlink data in a monitoring period of the preemption indication;
the configuration unit is further configured to configure, when a BWP configured for the UE partially overlaps or completely overlaps with a frequency domain range of the reference resource, a common search space for monitoring the preemption indication on the BWP for the UE, otherwise, not configure, on the BWP, the common search space for monitoring the preemption indication for the UE;
the issuing unit is further configured to not send the preemption indication to the UE when one or more BWPs activated at the current time are not configured with a common search space for monitoring the preemption indication; when only one activated BWP is configured with a common search space for monitoring a preemption indication at the current moment, sending the preemption indication to UE in the common search space of the activated BWP; and when a plurality of activated BWPs are configured with a common search space for listening for the camping indication at the current moment, transmitting the camping indication to the UE in the common search space of at least one BWP of the activated BWPs.
6. The apparatus according to claim 5, wherein if there are multiple activated BWPs configured with a common search space for listening camping indication at the current time, the issuing unit is configured to send the camping indication to the UE in the common search space of a part of the multiple activated BWPs, wherein the UE is instructed to listen to the camping indication only in the common search space of the part of the BWPs while activating BWPs; alternatively, a camping indication is sent to the UE in a common search space of the plurality of activated BWPs.
7. An apparatus for listening for a camping indication, the apparatus being located at a user equipment, the apparatus comprising:
a determining unit, configured to determine whether a base station configures, for a BWP, a common search space for listening to a camping indication, where, when the BWP configured by the base station for a UE partially overlaps or completely overlaps with a frequency domain range of a reference resource, the base station configures, for the UE, the common search space for listening to the camping indication on the BWP, and otherwise, the base station does not configure, for the UE, the common search space for listening to the camping indication on the BWP;
the monitoring unit is used for selecting a corresponding mode to monitor the preemption indication according to whether the activated BWP at the current moment is configured with a public search space for monitoring the preemption indication;
the monitoring unit is further configured to not monitor the preemption indication when one or more BWPs activated at the current time are not configured with the common search space for monitoring the preemption indication; when only one activated BWP is configured with a common search space for monitoring a preemption indication at the current moment, monitoring the preemption indication in the common search space of the activated BWP; and when a plurality of activated BWPs are configured with a common search space for listening for a camping indication at the current moment, listening for the camping indication in the common search space of at least one BWP of the plurality of activated BWPs.
8. The apparatus according to claim 7, wherein if there are multiple activated BWPs configured with a common search space for listening camping indication at the current time, the listening unit is configured to listen for the camping indication in the common search space of a part of the multiple activated BWPs when the base station indicates listening for the camping indication in the common search space of the part of the BWPs while activating BWPs; when the base station does not indicate which activated BWP common search space to listen for the preemption indication while activating BWP, listening for the preemption indication in the common search spaces of the activated BWPs.
9. A base station, characterized in that the base station comprises means for issuing a preemption indication as claimed in any one of claims 5 to 6.
10. A user equipment, characterized in that the user equipment comprises means for listening for a camping indication according to any of claims 7-8.
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| US8989026B2 (en) * | 2010-03-18 | 2015-03-24 | Qualcomm Incorporated | User-specific search space design for multi-carrier operation |
| JP6219018B2 (en) * | 2012-01-30 | 2017-10-25 | 株式会社Ｎｔｔドコモ | Radio base station apparatus, user terminal, radio communication system, and radio communication method |
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