CN113541893B

CN113541893B - Channel monitoring method and device

Info

Publication number: CN113541893B
Application number: CN202010297577.9A
Authority: CN
Inventors: 周欢
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2022-09-30
Anticipated expiration: 2040-04-15
Also published as: CN113541893A

Abstract

The embodiment of the application provides a channel monitoring method and a device, wherein the method comprises the following steps: and under the condition that the number of PDCCH blind detections in a Physical Downlink Control Channel (PDCCH) in a first span is greater than or equal to a first number and the number of CCEs (non-overlapping control channel elements) in the first span is greater than or equal to a second number, not monitoring PDCCH candidates in a first resource block set (RB-set) corresponding to a first index Search Space (SS), wherein the first span comprises the first SS. By adopting the embodiment of the application, the monitoring complexity of the terminal equipment can be reduced.

Description

Channel monitoring method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a channel monitoring method and apparatus.

Background

In a communication system, a terminal needs to schedule network equipment for transmitting uplink data and receiving downlink data, and scheduling information is carried in a Physical Downlink Control Channel (PDCCH) transmitted by the network equipment, and the terminal does not know the exact location of the PDCCH carrying the scheduling information, so the terminal needs to monitor PDCCH candidates in a Search Space (SS). However, when the terminal device needs to monitor a large number of PDCCH candidates in the SS, the monitoring complexity of the terminal device may be increased.

Disclosure of Invention

The embodiment of the application provides a channel monitoring method and device, which are used for reducing the complexity of terminal equipment in monitoring PDCCH candidates.

In a first aspect, an embodiment of the present application provides a channel monitoring method, which is applied to a terminal device, and the method includes:

and under the condition that the number of blind detections of Physical Downlink Control Channels (PDCCH) in a first span is greater than or equal to a first number and the number of non-overlapping control channel units in the first span is greater than or equal to a second number, not monitoring PDCCH candidates in a first resource block set (RB-set) corresponding to a first index Search Space (SS), wherein the first span comprises the first SS.

In a second aspect, an embodiment of the present application provides a channel monitoring apparatus, which is applied to a terminal device, and the apparatus includes:

a processing unit, configured to not monitor PDCCH candidates in a first resource block set RB-set corresponding to a first index search space SS under the condition that the number of PDCCH blind detections in a first span is greater than or equal to a first number or the number of non-overlapping control channel elements in the first span is greater than or equal to a second number, where the first span includes the first SS.

In a third aspect, an embodiment of the present application provides a terminal device, including a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and the programs include instructions for executing steps in the method according to the first aspect of the embodiment of the present application.

In a fourth aspect, the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform some or all of the steps described in the method according to the first aspect of the present application.

In a fifth aspect, the present application provides a computer program product, where the computer program product includes a non-transitory computer-readable storage medium storing a computer program, where the computer program is operable to cause a computer to perform some or all of the steps described in the method according to the first aspect of the present application. The computer program product may be a software installation package.

It can be seen that, in the embodiment of the present application, when the number of PDCCH blind detections in the first span is greater than or equal to the first number, and the number of non-overlapping control channel elements in the first span is greater than or equal to the second number, PDCCH candidates in the first resource block set RB-set corresponding to the first index search space SS are not monitored, and because the number of PDCCH blind detections in the span is greater than the limit number, and no repeated CCE is greater than the limit number, part of PDCCH candidates are not monitored, which is beneficial to reducing the complexity of monitoring the PDCCH candidates by the terminal device.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic flowchart of a channel monitoring method according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a channel monitoring apparatus according to an embodiment of the present application.

Detailed Description

The terminology used in the description of the embodiments section of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application. The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions.

Referring to fig. 1, fig. 1 is a schematic diagram of a communication system architecture provided in an embodiment of the present application, where the communication system includes a network device and a user equipment. As shown in fig. 1, a network device may communicate with a user device. The communication system may be a global system for mobile Communication (CSM), a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a Worldwide Interoperability for Microwave Access (WiMAX) system, a Long Term Evolution (LTE) system, a 5G communication system (e.g., new radio, NR)), a communication system in which a plurality of communication technologies are merged (e.g., a communication system in which an LTE technology and an NR technology are merged), or a subsequent evolution communication system. The form and number of the network devices and the user devices shown in fig. 1 are only examples, and do not limit the embodiments of the present application.

The user equipment in the application is a device with a wireless communication function, and can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The user equipment may be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in smart home (smart home), and the like. The user device may also be a handheld device with wireless communication capabilities, a vehicle mounted device, a wearable device, a computer device or other processing device connected to a wireless modem, etc. The user devices may be called different names in different networks, for example: terminal equipment, access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user equipment, cellular telephone, cordless telephone, Session Initiation Protocol (SIP) phone, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA), terminal equipment in a 5G network or future evolution network, and the like.

The network device in the present application is a device deployed in a radio access network to provide a wireless communication function. For example, the Network device may be a Radio Access Network (RAN) device on an Access Network side in a cellular Network, and the RAN device is a device for accessing a user equipment to a wireless Network, and includes but is not limited to: evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home evolved Node B, or Home Node B, HNB), BaseBand Unit (BBU), Management Entity (Mobility Management Entity, MME); for another example, the Network device may also be a node device in a Wireless Local Area Network (WLAN), such as an Access Controller (AC), a gateway, or a WIFI Access Point (AP); for another example, the network device may also be a transmission node or a transmission reception point (TRP or TP) in the NR system.

Some of the terms referred to in this application are explained below to facilitate the understanding of the reader:

1. segment span

The terminal device can be configured with one or more spans, and when the terminal is configured with a plurality of spans, the monitoring method for each span is the same.

The terminal equipment judges whether the PDCCH blind detection number and the number limit of the non-repeated CCEs are met or not in one span according to the subcarrier interval and the span mode, and if not, all or part of Resource Block-sets (RB-sets) corresponding to the highest index search space set in the span is discarded.

Where the subcarrier spacing includes 15KHz (μ ═ 0) and 30KHz (μ ═ 1), and the span pattern includes (2,2), (4,3), and (7, 3).

For different subcarrier intervals and different pan modes, the limitation of the maximum PDCCH blind detection number and the maximum non-repeated CCE number corresponding to span is different, the limited maximum PDCCH blind detection number is shown in table 1, and the limited maximum non-repeated CCE number is shown in table 2.

TABLE 1

TABLE 2

2. Search space

In order to reduce the UE listening complexity, two Search spaces are defined in the LTE system, namely Common Search Space (CSS) and UE-specific Search Space (UESS), where the unit of the size of the Search Space is the number of CCEs. The CSS is mainly used to transmit Downlink Control Information (DCI) of dedicated Control Information (e.g., system Information, paging message, multicast power Control Information, etc.) of a scheduling cell, and each terminal device needs to search for the DCI; while UESS is mainly used for transmitting DCI scheduled for each UE resource.

Referring to fig. 2, fig. 2 is a schematic flowchart of a channel monitoring method provided in an embodiment of the present application, and the method is applied to a terminal device, and includes the following steps:

step 201: and under the condition that the number of PDCCH blind detections in a Physical Downlink Control Channel (PDCCH) in a first span is greater than or equal to a first number and the number of CCEs (non-overlapping control channel elements) in the first span is greater than or equal to a second number, not monitoring PDCCH candidates in a first resource block set (RB-set) corresponding to a first index Search Space (SS), wherein the first span comprises the first SS.

The terminal equipment monitors a plurality of spans, and the method for monitoring each span is the same.

Wherein, the first span may include a plurality of SSs, and each SS may correspond to one or more RB-sets.

Wherein the first number and the second number are both preset.

Wherein the PDCCH candidates in the first RB-set that are not monitored are all PDCCH candidates in the first RB-set.

In one implementation of the present application, the method includes:

determining non-repeating CCEs in each second SS and the number of PDCCH blind tests in each second SS based on first signaling and/or K second SSs;

determining a number of non-overlapping CCEs within the first span based on the non-repeating CCEs within each of the second SSs, and determining a number of blind detections within the first span based on the number of PDCCH blind detections within each of the second SSs, the first span including the K second SSs.

Where the K second SSs are all SSs in the first span.

Here, the control-resource sets (CORESET) associated with the K second SSs may be the same or different, one SS may be associated with only one CORESET, and one CORESET may be associated with a plurality of SSs.

The first span may include one or more CORESET, and the PDCCH configured to the CORESET is uniquely located in a certain RB-set of the first span.

The first signaling is configured by the network device, and may be sent by the network device through a broadcast channel, system information, and the like.

Among the K second SSs, all the second SSs may have the first signaling configured, or some second SSs have the first signaling configured, and some second SSs have no first signaling configured.

If the network device configures the first signaling for a plurality of second SSs, the signaling configured for each second SS may be different or the same.

For example, there are 3 second SSs (SS1, SS2, and SS3), where the number of non-repeating CCEs in SS1 is 20, the number of PDCCH blind detections is 16, the number of non-repeating CCEs in SS2 is 20, the number of PDCCH blind detections is 16, the number of non-repeating CCEs in SS3 is 20, and the number of PDCCH blind detections is 16, and then the number of non-repeating CCEs in the first span is the sum of the number of non-repeating CCEs in SS1, the number of non-repeating CCEs in SS2, and the number of non-repeating CCEs in SS3, and then the number of PDCCH blind detections in the first span is the sum of the number of PDCCH blind detections in SS1, the number of PDCCH blind detections in SS2, and the number of PDCCH blind detections in SS 3.

It can be seen that, in the embodiment of the present application, the first span includes K second SSs, and the number of the non-repeated CCE and the number of the PDCCH blind detections in the first span are determined by the number of the non-repeated CCE and the PDCCH blind detections in each second SS, which is beneficial to improving the accuracy of determining the number of the non-repeated CCE and the PDCCH blind detections in the first span.

In an implementation manner of the present application, the determining the number of non-duplicated CCEs in each of the second SSs and the number of PDCCH blind detections in each of the second SSs includes:

determining non-repeated CCEs in second RB-sets corresponding to each second SS and PDCCH blind detection quantity in the second RB-sets corresponding to each second SS based on the first signaling and/or the K second SSs;

determining non-repeating CCEs in each second SS based on the non-repeating CCEs in the second RB-set corresponding to each second SS;

and determining the PDCCH blind detection number in each second SS based on the PDCCH blind detection number in the second RB-set corresponding to each second SS.

And if the second SS is configured with the first signaling, the first signaling indicates the second SS to monitor the corresponding second RB-set.

For example, if the second SS configured with the first signaling is SS1, there are 4 second RB-sets (RB-set0, RB-set1, RB-set2, and RB-set3), and the first signaling configured is 0110, SS1 listens to RB-set1 and RB-set 2.

Wherein, the second RB-set may be one or more.

Wherein, the number of the second RB-sets corresponding to each second SS may be the same or different.

Wherein, the second RB-sets corresponding to each second SS may be the same or different.

And the number of the non-repeated CCEs in the second SS is the sum of the non-repeated CCEs of the corresponding second RB-set, and the number of the PDCCH blind detections in the second SS is the sum of the number of the PDCCH blind detections of the corresponding second RB-set.

For example, there are 4 second RB-sets (RB-set0, RB-set1, RB-set2 and RB-set3) and 3 second SSs (SS1, SS2 and SS3), wherein, SS1 and SS2 correspond to RB-set0, RB-set1, RB-set2 and RB-set3, SS3 corresponds to RB-set0, RB-set1, RB-set0, RB-1, RB-set2 and RB-set3 respectively have 5 non-repeated CCEs and 4 PDCCH blind tests, so that the non-repeated CCEs in SS1 are 20, and the number of PDCCH blind tests is 16; RB-set0, RB-set1, RB-set2 and RB-set3 corresponding to SS2 all have 5 non-repeated CCEs and 4 PDCCH blind tests, so that the number of the non-repeated CCEs in SS2 is 20, and the number of the PDCCH blind tests is 16; RB-set0 and RB-set2 corresponding to SS3 have 10 non-repeated CCEs and are subjected to PDCCH blind detection for 8 times, so that the detection results are shown in the specification; the non-repeated CCEs within SS3 are 20 and the PDCCH blind detection is 16.

It can be seen that, in the embodiment of the present application, by determining the number of non-repeated CCEs and the number of PDCCH blind detections in the second RB-set corresponding to each second SS, it is beneficial to quickly determine the number of non-repeated CCEs and the number of PDCCH blind detections in each second SS.

In an implementation manner of the present application, the first SS is an SS with a largest index value among the K second SSs.

In an implementation manner of the present application, the first set of resource blocks is a second RB-set of a maximum index value in second RB-sets corresponding to the first SS.

In an implementation manner of the present application, the first number and the second number are determined based on a subcarrier spacing of a current serving cell and a mode of the first span.

The subcarrier spacing is configured by the network device, and the mode of the first span is determined by the terminal device according to the time for monitoring the PDCCH.

The subcarrier spacing may be 15KHz or 30 KHz.

The pattern of the first span may be (2,2), or (4,3), or (7, 3).

Referring to fig. 3, fig. 3 is a terminal device provided in an embodiment of the present application, including: one or more processors, one or more memories, one or more communication interfaces, and one or more programs;

the one or more programs are stored in the memory and configured to be executed by the one or more processors;

the program includes instructions for performing the steps of:

and under the condition that the number of PDCCH blind detections in a Physical Downlink Control Channel (PDCCH) in a first span is greater than or equal to a first number and the number of CCEs (non-overlapping control channel elements) in the first span is greater than or equal to a second number, not monitoring PDCCH candidates in a first resource block set (RB-set) corresponding to a first index Search Space (SS), wherein the first span comprises the first SS.

In an implementation of the application, the program comprises instructions for further performing the steps of:

In an implementation manner of the present application, in determining the number of non-repeating CCEs in each of the second SSs and the number of PDCCH blind detections in each of the second SSs, the program includes instructions for further performing the following steps:

the first SS is the SS with the largest index value in the K second SSs.

the first resource block set is a second RB-set of a maximum index value in a second RB-set corresponding to the first SS.

In an implementation of the application, the program comprises instructions for performing the further steps of:

the first number and the second number are determined based on a subcarrier spacing of a current serving cell and a pattern of the first span.

It should be noted that, for the specific implementation process of this embodiment, reference may be made to the specific implementation process described in the above method embodiment, and no description is given here.

Referring to fig. 4, fig. 4 is a channel monitoring apparatus provided in an embodiment of the present application, which is applied to a terminal device, and the apparatus includes:

a processing unit 401, configured to not monitor PDCCH candidates in a first resource block set RB-set corresponding to a first index search space SS under the condition that the number of PDCCH blind detections in a first span is greater than or equal to a first number and the number of non-overlapping control channel elements CCE in the first span is greater than or equal to a second number, where the first span includes the first SS.

In an implementation manner of the present application, the processing unit 401 is further specifically configured to:

determining non-repeating CCEs in each second SS and the number of PDCCH blind tests in each second SS based on first signaling and K second SSs;

In an implementation manner of the present application, in determining the number of non-repeated CCEs in each of the second SSs and the number of PDCCH blind detections in each of the second SSs, the processing unit 401 is further configured to:

In an implementation of the present application, the first number and the second number are determined based on a subcarrier spacing of a current serving cell and a pattern of the first span.

It should be noted that the processing unit 401 in the apparatus may be implemented by a processor.

Embodiments of the present application further provide a computer storage medium, where the computer storage medium stores a computer program for electronic data exchange, the computer program enables a computer to execute part or all of the steps of any one of the methods as described in the above method embodiments, and the computer includes a user equipment.

Embodiments of the present application also provide a computer program product comprising a non-transitory computer readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any of the methods as described in the above method embodiments. The computer program product may be a software installation package, the computer comprising user equipment.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit may be stored in a computer readable memory if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, the technical solution of the present application may be substantially implemented or a part of or all or part of the technical solution contributing to the prior art may be embodied in the form of a software product stored in a memory, and including several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the above-mentioned method of the embodiments of the present application. And the aforementioned memory comprises: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk, and various media capable of storing program codes.

Those skilled in the art will appreciate that all or part of the steps of the methods of the above embodiments may be implemented by a program, which is stored in a computer-readable memory, the memory including: flash Memory disks, Read-Only memories (ROMs), Random Access Memories (RAMs), magnetic or optical disks, and the like.

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A channel monitoring method is applied to a terminal device, and the method comprises the following steps:

under the conditions that the number of PDCCH blind detections in a first span is greater than or equal to a first number and the number of CCEs (control channel elements) in the first span is greater than or equal to a second number, not monitoring PDCCH candidates in a first resource block set (RB-set) corresponding to a first Search Space (SS);

the first SS is the SS with the largest index value in the K second SSs included in the first span, each second SS corresponds to a second RB-set, and the first RB-set corresponding to the first SS is the RB-set with the largest index value in the second RB-sets corresponding to the K second SSs respectively.

2. The method according to claim 1, characterized in that it comprises:

determining non-repeating CCEs in each second SS and the number of PDCCH blind tests in each second SS based on the first signaling and/or the K second SSs;

determining a number of non-overlapping CCEs within the first span based on the number of non-repeating CCEs within each second SS, and determining a number of blind detections within the first span based on the number of PDCCH blind detections within each second SS.

3. The method of claim 2, wherein the determining the number of non-repeating CCEs in each second SS and the number of PDCCH blind detections in each second SS comprises:

determining non-repeated CCEs in each second SS based on the non-repeated CCEs in the second RB-set corresponding to each second SS;

4. A method according to any of claims 1-3, wherein the first number and the second number are determined based on a subcarrier spacing of a current serving cell and a pattern of the first span.

5. A channel monitoring device is applied to a terminal device, and the device comprises:

a processing unit, configured to not monitor PDCCH candidates in a first resource block set corresponding to a first search space SS under the condition that the number of PDCCH blind detections in a first segment span is greater than or equal to a first number, and the number of CCE units in a non-overlapping control channel span in the first segment span is greater than or equal to a second number;

6. A terminal device, characterized in that the terminal device comprises a processor, a memory, a communication interface, one or more programs being stored in the memory and configured to be executed by the processor, the program comprising instructions for carrying out the steps in the method according to any one of claims 1-4.

7. A computer-readable storage medium, characterized in that a computer program for electronic data exchange is stored, wherein the computer program causes a computer to perform the method according to any one of claims 1-4.