CN112805937B

CN112805937B - Information determination method, device, system, equipment and storage medium

Info

Publication number: CN112805937B
Application number: CN201980066103.9A
Authority: CN
Inventors: 贺传峰
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-03-21
Filing date: 2019-03-21
Publication date: 2022-08-19
Anticipated expiration: 2039-03-21
Also published as: WO2020186531A1; CN112805937A

Abstract

The application provides an information determination method, an information determination device, an information determination system, information determination equipment and a storage medium, and relates to the technical field of communication. The method comprises the following steps: determining first Physical Downlink Control Channel (PDCCH) configuration information, wherein the first PDCCH configuration information is at least used for indicating a search space of a PDCCH corresponding to a first downlink message sent in a random access process of a first IAB (inter-access base station); and determining second PDCCH configuration information according to the first PDCCH configuration information, wherein the second PDCCH configuration information is at least used for indicating a search space of a PDCCH corresponding to the second downlink message received in the random access process of the first IAB. The PDCCH configuration information used by the UE for receiving the first downlink message is distinguished from the PDCCH configuration information used by the first IAB base station for receiving the second downlink message in the return link, so that the time domain of the search space of the PDCCH of the first IAB base station for receiving the second downlink message is not overlapped with the time domain of the search space of the PDCCH for sending the first downlink message, and the problem of half-duplex limitation of the first IAB base station for receiving the second downlink message and sending the first downlink message is solved.

Description

Information determination method, device, system, equipment and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to an information determining method, apparatus, system, device, and storage medium.

Background

An IAB (Integrated Access and Backhaul) base station integrates a wireless Access link and a wireless Backhaul link, where the wireless Access link is a communication link between a UE (User Equipment) and the IAB base station, and the wireless Backhaul link is a communication link between the IAB base station and another IAB base station, and is used for returning data.

In the random access process, the UE may access a first IAB base station that provides service for the UE, and the first IAB base station may access other second IAB base stations. The random access generally includes a plurality of processes, taking the example that the UE accesses the first IAB base station, for a Downlink message sent by the first IAB base station to the UE, the UE monitors a PDCCH (Physical Downlink Control CHannel) in a search space indicated by the search space configuration information in a time window corresponding to a time window parameter according to the search space configuration information indicated in the system message and the time window parameter configured by a high layer, so as to receive the Downlink message, thereby randomly accessing the first IAB base station.

For the first IAB base station, not only a downlink message needs to be sent to the UE, but also a downlink message sent by the second IAB base station needs to be received, and in some embodiments, the first IAB base station and the second IAB base station may be configured with the same search space, and at this time, due to the limitation of half duplex, the first IAB base station cannot simultaneously use the same search space to receive the downlink message sent by the second IAB base station and send the downlink message to the UE, and therefore, the search spaces configured by the first IAB base station and the second IAB base station need to be separated in a time domain.

Disclosure of Invention

The embodiment of the application provides an information determination method, an information determination device, an information determination system, information determination equipment and a storage medium, and can solve the problem that search spaces configured by a first IAB base station and a second IAB base station need to be separated in a time domain. The specific technical scheme is as follows:

in a first aspect, an information determining method is provided, where the information determining method is applied to a first access backhaul integrated IAB base station, and the method includes: determining first Physical Downlink Control Channel (PDCCH) configuration information, wherein the first PDCCH configuration information is at least used for indicating a search space of a PDCCH corresponding to a first downlink message sent in a random access process of the first IAB; and determining second PDCCH configuration information according to the first PDCCH configuration information, wherein the second PDCCH configuration information is at least used for indicating a search space of a PDCCH corresponding to a second downlink message received in the random access process of the first IAB.

In a possible implementation manner of the present application, the first PDCCH configuration information includes configuration information of a first time window corresponding to the first downlink message, and the second PDCCH configuration information includes configuration information of a second time window corresponding to the second downlink message; or, the first PDCCH configuration information includes first search space configuration information, and the second PDCCH configuration information includes second search space configuration information; or, the first PDCCH configuration information includes configuration information of a first time window and first search space configuration information corresponding to the first downlink message, and the second PDCCH configuration information includes configuration information of a second time window and second search space configuration information corresponding to the second downlink message.

In a possible implementation manner of this application, the determining, according to the first PDCCH configuration information, second PDCCH configuration information includes: determining the second search space configuration information according to the first search space configuration information and the first time domain offset; and/or determining the configuration information of the second time window according to the configuration information of the first time window and the second time domain offset.

In one possible implementation of the present application, the first time domain offset includes a slot offset and/or a symbol offset, the slot offset is used to determine a number of slots offset over a slot, and the symbol offset is used to determine a number of symbols offset over symbols within a slot.

In a possible implementation manner of the present application, the timeslot offset is a reference timeslot offset, the reference timeslot offset is greater than or equal to a parameter value of a first parameter, and the first parameter is used to indicate a number of consecutive timeslots for monitoring a physical downlink control channel PDCCH within a period; alternatively, the slot offset is indicated by the second IAB base station.

In a possible implementation manner of the present application, the symbol offset is a reference symbol offset, the reference symbol offset is greater than or equal to a parameter value of a second parameter, and the second parameter is used to indicate a continuous symbol position of a monitored physical downlink control channel PDCCH in one period; alternatively, the symbol offset is indicated by the second IAB base station.

In a possible implementation manner of this application, the determining, according to the configuration information of the first time window and the second time domain offset, the configuration information of the second time window includes: determining the starting position and window length information of the second time window according to the starting position and window length information of the first time window and the second time domain offset; or, determining the starting position of the second time window according to the starting position of the first time window and the second time domain offset.

In a second aspect, an information determining method is provided, where the information determining method is applied to a first access backhaul integrated IAB base station, and the method includes: determining second search space configuration information and/or determining configuration information of a second time window; the second search space configuration information is used to indicate the first IAB base station to receive a search space of a PDCCH corresponding to a second downlink message in a random access process of the first IAB base station, and the configuration information of the second time window is used to indicate the first IAB base station to receive the second downlink message in the corresponding second time window.

In a possible implementation manner of the present application, the determining second search space configuration information includes: and determining a third parameter and/or a fourth parameter in the second search space configuration information, where the third parameter is used to indicate a PDCCH monitoring occasion corresponding to receiving a second downlink message in a random access process of the first IAB base station, and the fourth parameter is used to indicate a symbol position where the first IAB base station receives the second downlink message in the same time slot.

In a possible implementation manner of the present application, the determining the configuration information of the second time window includes: determining a start position and/or window length information of the second time window.

In a possible implementation manner of the present application, a starting position of the second time window is located at a first symbol of a nearest control resource set at least N symbols after a last symbol of a PRACH listening opportunity, where N is an integer greater than 1.

In a possible implementation manner of the present application, a starting position of the second time window is located in a first symbol of an mth control resource set after at least one symbol after a last symbol of the PRACH monitoring opportunity, where M is an integer greater than 1.

In a third aspect, an information determining method is provided, where the information determining method is applied to a second access backhaul integrated IAB base station, and the method includes: determining first Physical Downlink Control Channel (PDCCH) configuration information, wherein the first PDCCH configuration information is at least used for indicating a search space of a PDCCH corresponding to a first downlink message sent in a random access process of the first IAB; and determining second PDCCH configuration information according to the first PDCCH configuration information, wherein the second PDCCH configuration information is at least used for indicating a search space of a PDCCH corresponding to a second downlink message received in the random access process of the first IAB.

In a possible implementation manner of the present application, the determining, according to the first PDCCH configuration information, second PDCCH configuration information includes: determining the second search space configuration information according to the first search space configuration information and the first time domain offset; and/or determining the configuration information of the second time window according to the configuration information of the first time window and the second time domain offset.

In a possible implementation manner of the present application, the symbol offset is a reference symbol offset, where the reference symbol offset is greater than or equal to a parameter value of a second parameter, and the second parameter is used to indicate a continuous symbol position of a PDCCH monitoring a physical downlink control channel in one period; alternatively, the symbol offset is indicated by the second IAB base station.

In a possible implementation manner of the present application, the determining the configuration information of the second time window according to the configuration information of the first time window and the second time domain offset includes: determining the starting position and window length information of the second time window according to the starting position and window length information of the first time window and the second time domain offset; or, determining the starting position of the second time window according to the starting position of the first time window and the second time domain offset.

In a fourth aspect, an information determining method is provided, where the information determining method is applied to a second access backhaul integrated IAB base station, and the method includes: determining second search space configuration information and/or determining configuration information of a second time window; the second search space configuration information is used to indicate the first IAB base station to receive a search space of a PDCCH corresponding to a second downlink message in a random access process of the first IAB base station, and the configuration information of the second time window is used to indicate the first IAB base station to receive the second downlink message in the corresponding second time window.

In a fifth aspect, an information determination apparatus is provided, where the apparatus is applied in a first IAB base station, and the apparatus includes: a first determining module, configured to determine first PDCCH configuration information, where the first PDCCH configuration information is at least used to indicate a search space of a PDCCH corresponding to a first downlink message sent in a random access process of the first IAB base station; a second determining module, configured to determine second PDCCH configuration information according to the first PDCCH configuration information, where the second PDCCH configuration information is at least used to indicate a search space of a PDCCH corresponding to a second downlink message received in a random access process of the first IAB base station.

In one possible implementation manner of the present application, the second determining module is configured to: determining the second search space configuration information according to the first search space configuration information and the first time domain offset; and/or determining the configuration information of the second time window according to the configuration information of the first time window and the second time domain offset.

In one possible implementation manner of the present application, the second determining module is configured to: determining the starting position and window length information of the second time window according to the starting position and window length information of the first time window and the second time domain offset; or determining the starting position of the second time window according to the starting position of the first time window and the second time domain offset.

In a sixth aspect, an information determining apparatus is provided, where the information determining apparatus is applied in a first access backhaul integrated IAB base station, and the apparatus includes: a third determining module, configured to determine second search space configuration information, and/or determine configuration information of a second time window; the second search space configuration information is used to indicate the first IAB base station to receive a search space of a PDCCH corresponding to a second downlink message in a random access process of the first IAB base station, and the configuration information of the second time window is used to indicate the first IAB base station to receive the second downlink message in the corresponding second time window.

In one possible implementation manner of the present application, the third determining module is configured to: and determining a third parameter and/or a fourth parameter in the second search space configuration information, where the third parameter is used to indicate a PDCCH monitoring occasion corresponding to receiving a second downlink message in a random access process of the first IAB base station, and the fourth parameter is used to indicate a symbol position where the first IAB base station receives the second downlink message in the same time slot.

In one possible implementation manner of the present application, the third determining module is configured to: determining a start position and/or window length information of the second time window.

In a possible implementation manner of the present application, a starting position of the second time window is located in a first symbol of an mth control resource set after at least one symbol after a last symbol of the PRACH listening opportunity, where M is an integer greater than 1.

In a seventh aspect, an information determining apparatus is provided, where the apparatus is applied to a second access backhaul integrated IAB base station, and the apparatus includes: a fourth determining module, configured to determine first PDCCH configuration information, where the first PDCCH configuration information is at least used to indicate a search space of a PDCCH corresponding to a first downlink message sent in a random access process of the first IAB base station; a fifth determining module, configured to determine second PDCCH configuration information according to the first PDCCH configuration information, where the second PDCCH configuration information is at least used to indicate a search space of a PDCCH corresponding to a second downlink message received in a random access process of the first IAB base station.

In a possible implementation manner of the present application, the first PDCCH configuration information includes configuration information of a first time window corresponding to the first downlink message, and the second PDCCH configuration information includes configuration information of a second time window corresponding to the second downlink message; or, the first PDCCH configuration information includes first search space configuration information, and the second PDCCH configuration information includes second search space configuration information; or the first PDCCH configuration information includes configuration information of a first time window and first search space configuration information corresponding to the first downlink message, and the second PDCCH configuration information includes configuration information of a second time window and second search space configuration information corresponding to the second downlink message.

In one possible implementation manner of the present application, the fifth determining module is configured to: determining the second search space configuration information according to the first search space configuration information and the first time domain offset; and/or determining the configuration information of the second time window according to the configuration information of the first time window and the second time domain offset.

In one possible implementation manner of the present application, the fifth determining module is configured to: determining the starting position and window length information of the second time window according to the starting position and window length information of the first time window and the second time domain offset; or, determining the starting position of the second time window according to the starting position of the first time window and the second time domain offset.

In an eighth aspect, an information determining apparatus is provided, where the information determining apparatus is applied in a second access backhaul integrated IAB base station, and the apparatus includes: a sixth determining module, configured to determine second search space configuration information, and/or determine configuration information of a second time window; the second search space configuration information is used to indicate the first IAB base station to receive a search space of a PDCCH corresponding to a second downlink message in a random access process of the first IAB base station, and the configuration information of the second time window is used to indicate the first IAB base station to receive the second downlink message in the corresponding second time window.

In one possible implementation manner of the present application, the sixth determining module is configured to: and determining a third parameter and/or a fourth parameter in the second search space configuration information, where the third parameter is used to indicate a PDCCH monitoring occasion corresponding to receiving a second downlink message in a random access process of the first IAB base station, and the fourth parameter is used to indicate a symbol position where the first IAB base station receives the second downlink message in the same time slot.

In one possible implementation manner of the present application, the sixth determining module is configured to: determining a start position and/or window length information of the second time window.

In a possible implementation manner of the present application, a starting position of the second time window is located in a first symbol of a nearest control resource set at least N symbols after a last symbol of a PRACH listening opportunity of a physical random access channel, where N is an integer greater than 1.

A ninth aspect provides a communication system, including a first access backhaul integrated IAB base station and a second IAB base station, where the first IAB base station includes the apparatus in any one of the fifth aspect and the sixth aspect, and the second IAB base station includes the apparatus in any one of the seventh aspect and the eighth aspect.

In a tenth aspect, there is provided a first IAB base station comprising a processor and a memory, the memory storing at least one instruction for execution by the processor to implement the method of any of the first and second aspects.

In an eleventh aspect, there is provided a second IAB base station, comprising a processor and a memory, the memory storing at least one instruction for execution by the processor to implement the method of any of the third and fourth aspects.

In a twelfth aspect, a computer-readable storage medium is provided, the computer-readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the method of any of the first and second aspects.

In a thirteenth aspect, a computer-readable storage medium is provided, the computer-readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the method of any of the third and fourth aspects.

In a fourteenth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of the first and second aspects described above.

In a fifteenth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of the third and fourth aspects above.

The technical scheme provided by the embodiment of the application has the beneficial effects that at least: determining first PDCCH configuration information, wherein the first PDCCH configuration is at least used for indicating a search space of a PDCCH corresponding to a first downlink message sent in a random access process of a first IAB base station, and determining second PDCCH configuration information according to the first PDCCH configuration information, wherein the second PDCCH configuration information is at least used for indicating the search space of the PDCCH corresponding to a second downlink message received in the random access process of the first IAB base station. That is, the PDCCH configuration information used by the UE to receive the first downlink message is distinguished from the PDCCH configuration information used by the first IAB base station to receive the second downlink message in the backhaul link, so that the time domain of the search space of the PDCCH used by the first IAB base station to receive the second downlink message is not overlapped with the time domain of the search space of the PDCCH used to send the first downlink message, and the problem of half-duplex limitation in which the first IAB base station receives the second downlink message and sends the first downlink message is solved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a flow chart of a random access procedure provided in an exemplary embodiment of the present application;

FIG. 2 is a schematic diagram of an application scenario provided by an exemplary embodiment of the present application;

FIG. 3 is a schematic diagram of an application scenario provided by another exemplary embodiment of the present application;

FIG. 4 is a flow chart of an information determination method provided by another exemplary embodiment of the present application;

FIG. 5 is a flow chart of an information determination method provided by another exemplary embodiment of the present application;

fig. 6 is a diagram illustrating a PDCCH monitoring occasion according to an exemplary embodiment of the present application;

fig. 7 is a diagram of a PDCCH monitoring occasion according to another exemplary embodiment of the present application;

FIG. 8 is a flow chart of an information determination method provided by another exemplary embodiment of the present application;

fig. 9 is a diagram of a PDCCH monitoring occasion according to an exemplary embodiment of the present application;

fig. 10 is a diagram of a PDCCH monitoring occasion according to another exemplary embodiment of the present application;

FIG. 11 is a flow chart of an information determination method provided by another exemplary embodiment of the present application;

FIG. 12 is a flow chart of an information determination method provided by another exemplary embodiment of the present application;

FIG. 13 is a flow chart of an information determination method provided by another exemplary embodiment of the present application;

FIG. 14 is a block diagram of an information determination device provided by an exemplary embodiment of the present application;

FIG. 15 is a block diagram of an information determination device provided in another exemplary embodiment of the present application;

FIG. 16 is a block diagram of an information determination device provided in another exemplary embodiment of the present application;

fig. 17 is a block diagram of an information determination apparatus provided in another exemplary embodiment of the present application;

fig. 18 is a block diagram of a first IAB base station according to an exemplary embodiment of the present application;

fig. 19 is a block diagram of a second IAB base station according to an exemplary embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, the following detailed description of the embodiments of the present application will be made with reference to the accompanying drawings.

First, terms related to the embodiments of the present application will be briefly described.

PDCCH channel: the set of physical resource elements may be used to carry DCI (Downlink Control Information), and the Control Information carried by the PDCCH includes common Control Information and dedicated Control Information according to different scopes.

Searching a space: the starting position of the UE blind detection and the searching mode of the PDCCH channel are defined.

Control Resource Set (CORESET): the method is a time-frequency resource set, and the UE detects the PDCCH in the corresponding control resource set. The control Resource set is composed of a Group of REGs (Resource Element Group).

Taking the UE accessing the IAB base station as an example, the random access procedure will be briefly introduced. Referring to fig. 1, in a 5G system, the random access procedure may generally include the following four-step procedure:

the first step is as follows: the UE sends MSG1 to the IAB base station, and the MSG1 is a random access preamble sequence.

As an example, the resource information of the MSG1 may be obtained through a resource configuration of a RACH (Random Access Channel). In the Rel-15NR (New Radio) technology, RACH resource configuration information configured for UE access is defined, including 256 types, and a cell may indicate RACH resource configuration information used by itself to the UE in a system message. Each RACH resource configuration information includes a preamble format, a period, a radio frame offset, a subframe number within a radio frame, a starting symbol within a subframe, the number of PRACH slots within a subframe, the number of PRACH opportunities within a PRACH slot, and a PRACH opportunity duration. The time, frequency and code information of the PRACH resource can be determined through the information, so that the UE can send the MSG1 on the corresponding PRACH resource according to the RACH resource configuration information indicated by the IAB base station.

The second step is that: after detecting the MSG1 sent by the UE, the IAB base station sends an RAR (Random Access Response) (MSG2) to the UE to inform the UE of the uplink resource information that can be used when sending the next message (MSG 3).

Of course, the IAB base station may perform other operations besides the above, such as allocating a Temporary RNTI (Radio Network Temporary Identity) to the UE, and the like, which will not be described herein.

The third step: and the UE receives the RAR and sends the MSG3 to the IAB on the uplink resource indicated by the RAR.

In some embodiments, the UE may monitor PDCCH in a search space within a RAR time window corresponding to the RAR to receive the RAR. The RAR time window may be configured through a higher layer parameter, and the configuration information of the search space of the PDCCH may be indicated through a system message.

As an example, the MSG3 may carry a UE-specific temporary identification information.

The fourth step: after receiving the MSG3, the IAB base station sends MSG4 to the UE.

As an example, the MSG4 includes a contention resolution message and also includes information of uplink transmission resources allocated to the UE. When receiving the MSG4 sent by the base station, the UE detects whether the temporary identifier information sent by the UE in MSG3 is included in the contention resolution message sent by the IAB base station, if so, it indicates that the UE random access procedure is successful, otherwise, it is determined that the random access procedure is failed, and the UE needs to initiate the random access procedure from the first step again.

In the above random access process, a message sent by the IAB base station to the UE is called a downlink message, for example, the downlink message is MSG2 or MSG 4.

It should be noted that, the foregoing description is only made by taking the example that the random access procedure includes a four-step procedure. In another embodiment, the random access procedure may further include a two-step procedure, in which case, the information determination method provided in the embodiment of the present application may also be applicable, and for example, in the two-step random access procedure, the downlink message is Msg B in the RACH procedure.

In addition, the first downlink message and the second downlink message described below are similar to the MSG2 or MSG4 in the four-step random access procedure, and MSG B is included in the two-step random access procedure.

Next, a brief description is given of an application scenario related to the embodiment of the present application.

The IAB base station refers to a base station providing wireless access for users, and usually requires a backhaul link to connect to a core network or other IAB base stations for data backhaul, as shown in fig. 2. Generally, in consideration of the complexity and flexibility of deployment, backhaul links between IAB base stations and other IAB base stations mostly employ wireless backhaul, such as microwave backhaul. With the acceleration of the 5G deployment pace, the requirements for network capacity, complexity and time delay are gradually improved, and the number of mobile base stations is gradually increased, so that the application range of wireless backhaul is gradually expanded, so that the IAB base station is more easily deployed in dense and complex scenes, and the burden of deploying a wired transmission network is reduced.

In some embodiments, if one IAB base station can control and schedule another IAB base station, the IAB base station may be referred to as a parent node, i.e., the IAB base station is a parent node of another IAB base station; an IAB base station may be referred to as a child node if it is under the control of another IAB base station, i.e., it is a child node of another IAB base station. For example, referring to fig. 2, the IAB base station 1 may be referred to as a parent node, and the IAB base station 1 is a parent node of the IAB base station 2; the IAB base station 2 may be referred to as a parent node, the IAB base station 2 is a parent node of the IAB base station 3, it should be understood that the IAB base station 2 is a child node of the IAB base station 1, and the IAB base station 3 is a child node of the IAB base station 2.

In the embodiments of the present application, for convenience of description and understanding, a child node is referred to as a first IAB base station, and a parent node is referred to as a second IAB base station, which is described below.

For wireless backhaul, in a random access process, due to a limitation of half duplex, a first IAB base station cannot receive a second downlink message sent by a second IAB base station while sending a first downlink message to a UE, that is, in a search space for the same PDCCH, the first downlink message cannot be sent while the second downlink message is also received, and therefore, search spaces for sending the first downlink message to the UE and the PDCCH for receiving the second downlink message need to be separated in a time domain. To this end, an embodiment of the present application provides an information determining method, which may enable search spaces of a PDCCH for receiving a first downlink message and a PDCCH for transmitting a second downlink message to be non-overlapping in a time domain. For specific implementation, reference is made to the following examples.

In addition, the implementation environment related to the embodiments of the present application is briefly described.

Referring to fig. 3, fig. 3 is a schematic diagram illustrating an implementation environment in accordance with an example embodiment. The implementation environment may include a first IAB base station 110, a second IAB base station 120, and a UE 130. The UE 130 may access an IAB base station serving itself, for example, the UE may access the first IAB base station 110, and the first IAB base station 110 may access the second IAB base station 120 to perform data backhaul through a wireless backhaul link with the second IAB base station 120, that is, a backhaul link is formed between the first IAB base station and the second IAB base station.

It should be noted that, in the embodiment of the present application, the information determination method is only described as an example when applied to the foregoing scenario, and in another embodiment, the information determination method may also be applied to other scenarios, which is not limited in the embodiment of the present application.

Next, the information determination method provided by the embodiment of the present application will be described in detail with reference to the accompanying drawings. Referring to fig. 4, fig. 4 is a flowchart illustrating an information determining method according to an exemplary embodiment, which may be applied in the implementation environment illustrated in fig. 3, and which may include the following implementation steps:

step 401: the first IAB base station determines first PDCCH configuration information, wherein the first PDCCH configuration information is at least used for indicating a search space of a PDCCH which corresponds to a first downlink message sent in a random access process of the first IAB base station.

As an example, the first PDCCH configuration information may be sent by the second IAB base station, and is used for the UE under the second IAB base station to receive a downlink message sent by the second IAB base station. Alternatively, the first PDCCH configuration information may also be determined by the first IAB base station itself, and may be used for the UE under the first IAB base station to receive the downlink message sent by the first IAB base station. That is to say, in the present application, the first IAB base station and the second IAB base station have the same search space for receiving the PDCCH configured by the downlink message for the UE.

Step 402: and the first IAB base station determines second PDCCH configuration information according to the first PDCCH configuration information, wherein the second PDCCH configuration information is at least used for indicating a search space of a PDCCH corresponding to a second downlink message received in the random access process of the first IAB base station.

For the first IAB base station, because the first IAB base station is limited by half duplex, the first PDCCH configuration information cannot be used to receive the second downlink message sent by the second IAB base station, and therefore, here, one second PDCCH configuration information needs to be re-determined according to the first PDCCH configuration information, so that the first IAB base station receives the second downlink message sent by the second IAB base station by using the second PDCCH configuration information. The search spaces of the PDCCHs indicated by the first PDCCH configuration information and the second PDCCH configuration information are separated in the time domain, that is, the time domains are not overlapped, so that the problem of half-duplex limitation that the first IAB base station receives the second downlink message and transmits the first downlink message can be solved.

As an example, the first PDCCH configuration information includes configuration information of a first time window corresponding to the first downlink message, and the second PDCCH configuration information includes configuration information of a second time window corresponding to the second downlink message; or, the first PDCCH configuration information includes first search space configuration information, and the second PDCCH configuration information includes second search space configuration information; or the first PDCCH configuration information includes configuration information of a first time window and first search space configuration information corresponding to the first downlink message, and the second PDCCH configuration information includes configuration information of a second time window and second search space configuration information corresponding to the second downlink message.

The time window corresponding to the downlink message exists periodically and comprises a starting position and a window length. As an example, when the downlink message is MSG2, the time window corresponding to the downlink message is an RAR time window, for example, when the first downlink message is MSG2, the first time window corresponding to the first downlink message is a first RAR time window, and similarly, the second time window corresponding to the second downlink message is a second RAR time window.

For the UE, the PDCCH may be monitored in a search space indicated by the first search space configuration information within a first time window corresponding to the first downlink message, so as to receive the first downlink message. For the first IAB base station, the PDCCH may be monitored in the search space indicated by the second search space configuration information within the second time window corresponding to the second downlink message, so as to receive the second downlink message. In this case, the first PDCCH configuration information is further used to instruct the first IAB base station to send the first downlink message in the corresponding first time window, and the second PDCCH configuration information is further used to instruct the first IAB base station to receive the second downlink message in the corresponding second time window.

In this embodiment of the present application, first PDCCH configuration information is determined, where the first PDCCH configuration information is at least used to instruct a first IAB base station to send a search space of a PDCCH corresponding to a first downlink message, and second PDCCH configuration information is determined according to the first PDCCH configuration information, where the second PDCCH configuration information is at least used to instruct the first IAB base station to receive a search space of a PDCCH corresponding to a second downlink message. That is, the PDCCH configuration information used by the UE to receive the first downlink message is distinguished from the PDCCH configuration information used by the first IAB base station to receive the second downlink message in the backhaul link, so that the time domain of the search space of the PDCCH used by the first IAB base station to receive the second downlink message is not overlapped with the time domain of the search space of the PDCCH used to send the first downlink message, and the problem of half-duplex limitation in which the first IAB base station receives the second downlink message and sends the first downlink message is solved.

Fig. 5 is a flowchart illustrating an information determining method according to an exemplary embodiment, where the information determining method may be applied to the implementation environment illustrated in fig. 3, and here, taking as an example that the first PDCCH configuration information includes first search space configuration information, and the second PDCCH configuration information includes second search space configuration information, the method may include the following implementation steps:

step 501: first search space configuration information is determined.

The first search space configuration information is used for configuring a search space of a PDCCH corresponding to the UE receiving the first downlink message. As an example, the UE monitors a corresponding PDCCH in a search space within a first time window indicated by the first time window parameter based on the first search space configuration information and a first time window parameter configured by the higher layer parameter, so as to receive a first downlink message sent by the first IAB base station. As an example, the higher layer parameter may be ra-ResponseWindow.

Step 502: and determining second search space configuration information according to the first search space configuration information and the first time domain offset.

That is, a time offset may be added based on first search space configuration information used by the UE to receive the first downlink message, so as to generate new second search space configuration information used by the IAB base station to receive the second downlink message, and since the second search space configuration information is different from the first search space configuration information, i.e., differs by a time offset, it is not difficult to understand that search spaces indicated by the two search space configuration information are also different in the time domain.

As an example, the first time domain offset comprises a slot offset that is used to determine a number of slots that are offset over a slot. That is, the first search space configuration information may be subjected to time domain offset at a time slot level, so as to obtain the second search space configuration information. Furthermore, part of the PDCCH monitoring occasions can be extracted, and time slot level offset is carried out.

In a possible implementation manner of the present application, the timeslot offset is a reference timeslot offset, the reference timeslot offset is greater than or equal to a parameter value of a first parameter, and the first parameter is used to indicate the number of consecutive timeslots for monitoring a physical downlink control channel PDCCH in one period.

That is, the slot offset may be a predefined reference slot offset, and in order to ensure non-overlapping in the time domain, a size relationship between the reference slot offset and the first parameter needs to be considered. Illustratively, the first parameter is a duration parameter in the SearchSpace information, and when the duration is 2, it is described that 2 slots are continuously monitored during monitoring the PDCCH in one period, and at this time, the reference slot offset needs to be greater than or equal to 2 to ensure that the search space corresponding to the second search space configuration information and the search space corresponding to the first search space configuration information do not overlap in a time domain.

For example, the reference slot offset may be introduced into a monitongslotperiodicityandoffset parameter of the search space, so that the second search space configuration information different from the first search space configuration information is determined according to the reference slot offset. The monitorngslotperiodicityandoffset parameter is used for indicating the monitoring occasion and offset for the UE to receive the PDCCH corresponding to the first downlink message.

For example, assuming that the monitoringSlotPeriodicityAndOffset in the configured first search space configuration information is sl8 ═ 0, and the parameter value of the first parameter is 1, it indicates that the period of the PDCCH monitoring occasion for the UE to receive the first downlink message is 8 slots, the offset is 0, and the number of slots for continuous monitoring is 1, as shown in fig. 6. At this time, a reference time slot offset may be increased in a predefined time domain offset manner, where the reference time slot offset may be an integer greater than or equal to 1, and if the reference time slot offset is equal to 1, the listening opportunity corresponding to the obtained second search space configuration information is as shown in fig. 7.

In another possible implementation of the present application, the slot offset is indicated by the second IAB base station.

That is to say, the timeslot offset may also be indicated to the first IAB base station by the second IAB base station, as an example, the second IAB base station may indicate the timeslot offset through a system message, and further, a new parameter may be added to the system message, for example, the new parameter may be defined as ra-SearchSpace-slot offset-IAB, so as to indicate, through the new ra-SearchSpace-slot offset-IAB parameter, the time domain offset that needs to be adopted by the first IAB base station. As an example, the newly added parameter may be defined in the standard as follows:

ra-SearchSpace-SlotOffset-IAB INTEGER(1..N-1)OPTIONAL，--Need S；

as an example, the slot offset is in units of a first parameter, that is, a parameter value of the newly added parameter is used to indicate how many durations the slot offset is offset, so that a product between the slot offset and the parameter value of the first parameter is used to indicate an actual time domain offset, that is, the actual time domain offset is a result of multiplying ra-SearchSpace-slot offset-IAB by the duration parameter.

As an example, the value range of the parameter may be [1, N ], where N may be a fixed positive integer, or may also be the number of timeslots included in the monitoring period of the PDCCH configured in the first search space configuration information.

It is worth mentioning that, a time domain offset parameter of a time slot level is introduced for the configuration of the search space of the PDCCH, so that the monitoring time of the PDCCH corresponding to the second downlink message received by the first IAB base station can be simply obtained, the number of messages added in the system message is small, the message overhead is small, and the influence on the existing communication system is small.

In this embodiment of the present application, first PDCCH configuration information is determined, where the first PDCCH configuration information is at least used to instruct a first IAB base station to send a search space of a PDCCH corresponding to a first downlink message, and second PDCCH configuration information is determined according to the first PDCCH configuration information, where the second PDCCH configuration information is at least used to instruct the first IAB base station to receive a search space of a PDCCH corresponding to a second downlink message. That is, the PDCCH configuration information used by the UE to receive the first downlink message is distinguished from the PDCCH configuration information used by the first IAB base station to receive the second downlink message in the backhaul link, so that the time domain of the search space of the PDCCH used by the first IAB base station to receive the second downlink message is not overlapped with the time domain of the search space of the PDCCH used to send the first downlink message, and the half-duplex limitation problem that the first IAB base station receives the second downlink message and sends the first downlink message is solved.

Fig. 8 is a flowchart illustrating an information determining method according to an exemplary embodiment, which may be applied in the implementation environment illustrated in fig. 3, where the first PDCCH configuration information includes first search space configuration information, and the second PDCCH configuration information includes second search space configuration information, for example, the method may include the following implementation steps:

step 801: first search space configuration information is determined.

Step 802: and determining second search space configuration information according to the first search space configuration information.

As one example, the first time domain offset includes a symbol offset that is used to determine the number of symbols that are offset on the symbols within the slot. That is, the first search space configuration information may be subjected to symbol-level time domain offset, so as to obtain the second search space configuration information. Further, part of the PDCCH monitoring occasions may be extracted and symbol level offset performed.

In a possible implementation manner of the present application, the symbol offset is a reference symbol offset, and the reference symbol offset is greater than or equal to a parameter value of a second parameter, where the second parameter is used to indicate consecutive symbol positions of the monitored physical downlink control channel PDCCH in one period.

That is, the symbol offset may be a predefined reference symbol offset, and in order to ensure non-overlap in the time domain, a magnitude relationship between the reference symbol offset and the second parameter needs to be considered. For example, the second parameter is a duration parameter in the ControlResourceSet information, and when the duration is 2, it is described that 2 symbols are continuously monitored during monitoring the PDCCH in one period, and at this time, the offset of the reference symbol needs to be greater than or equal to 2 to ensure that the search space corresponding to the second search space configuration information does not overlap with the search space corresponding to the first search space configuration information in the time domain.

As an example, the reference symbol offset is introduced by monitoringsymbols within the first search space configuration information, so as to determine the second search space configuration information different from the first search space configuration information according to the reference symbol offset, wherein the monitoringsymbols within the slot corresponding to the UE receiving the first downlink message is indicated by the monitoringsymbols within the slot.

Exemplarily, when the monitoringsymbols within the configured first search space configuration information is "10000000000000" and the second parameter duration is 2, it indicates that the PDCCH monitoring occasion is on the first two symbols of the slot, as shown in fig. 9. At this time, a reference symbol offset may be increased by a predefined time domain offset manner, where the reference symbol offset may be an integer greater than or equal to 2, and assuming that the reference symbol offset is equal to 2, the listening occasions corresponding to the second search space configuration information that can be obtained are as shown in fig. 10.

In another possible implementation of the present application, the symbol offset is indicated by the second IAB base station.

That is to say, the symbol offset may also be indicated to the first IAB base station by the second IAB base station, as an example, the second IAB base station may indicate the symbol offset through a system message, and further, a new parameter may be added to the system message, for example, the new parameter may be defined as ra-SearchSpace-slot offset-IAB, so as to indicate, through the new ra-SearchSpace-slot offset-IAB parameter, the time domain offset that needs to be adopted by the first IAB base station. As an example, the newly added parameter may be defined in the standard as follows:

ra-SearchSpace-SlotOffset-IAB INTEGER(1..N-1)OPTIONAL，--Need S；

as an example, the symbol offset is in units of the second parameter, that is, the parameter value of the newly added parameter is used to indicate how many duration the symbol offset is offset, so the product between the symbol offset and the parameter value of the second parameter is used to indicate the actual time domain offset, that is, the actual time domain offset is the result of the multiplication of ra-SearchSpace-slot offset-IAB and the duration parameter.

As an example, the value range of the parameter may be [1, N ], and N may be a fixed positive integer.

It is worth mentioning that a symbol-level time domain offset parameter is introduced for the configuration of the search space of the PDCCH, so that the monitoring time for receiving the PDCCH corresponding to the second downlink message in the random access process of the first IAB base station can be simply obtained, the number of messages added in the system message is small, the message overhead is small, and the influence on the existing communication system is small.

In the embodiment of the present application, first PDCCH configuration information is determined, where the first PDCCH configuration information is at least used to instruct a first IAB base station to send a search space of a PDCCH corresponding to a first downlink message, and second PDCCH configuration information is determined according to the first PDCCH configuration information, and the second PDCCH configuration information is at least used to instruct the first IAB base station to receive a search space of a PDCCH corresponding to a second downlink message. That is, the PDCCH configuration information used by the UE to receive the first downlink message is distinguished from the PDCCH configuration information used by the first IAB base station to receive the second downlink message in the backhaul link, so that the time domain of the search space of the PDCCH used by the first IAB base station to receive the second downlink message is not overlapped with the time domain of the search space of the PDCCH used to send the first downlink message, and the half-duplex limitation problem that the first IAB base station receives the second downlink message and sends the first downlink message is solved.

It should be noted that, the above is only described by taking the time domain offset at the slot level or the time domain offset at the symbol level as an example for the first search space configuration information, and in some embodiments, the time domain offset at the slot level and the time domain offset at the symbol level may also be performed on the first search space configuration information at the same time, that is, the first time domain offset includes the slot offset and the symbol offset. That is, time domain shifting at the slot level and time domain shifting at the symbol level may be performed, that is, the foregoing embodiment 5 and embodiment 8 may be implemented in combination, which is not limited in this embodiment of the present application.

Fig. 11 is a flowchart of an information determining method according to an exemplary embodiment, where the information determining method may be applied to the implementation environment shown in fig. 3, and here by taking as an example that the first PDCCH configuration information includes configuration information of a first time window corresponding to the first downlink message, and the second PDCCH configuration information includes configuration information of a second time window corresponding to the second downlink message, the method may include the following implementation steps:

step 1101: configuration information for a first time window is determined.

The configuration information of the first time window may be configured by a higher layer parameter, for example, the higher layer parameter may be ra-ResponseWindow. And the UE monitors the PDCCH in the search space in the first time window according to the configuration information of the first time window and the first search space configuration indicated in the system message so as to receive the first downlink message.

Step 1102: and determining the configuration information of the second time window according to the configuration information of the first time window and the second time domain offset.

For the first IAB base station, because of the limitation of half duplex, the first IAB base station may not monitor the PDCCH in the first time window, so a time domain offset may be added according to the configuration information of the first time window, so as to generate new configuration information of the second time window, so that the first IAB base station monitors the PDCCH in the second time window, that is, monitors the PDCCH in different time windows, so as to ensure that the PDCCH is not overlapped in the time domain. As an example, the search space configuration information used at this time may be obtained through a system message, that is, may be the same as the search space configuration information used by the UE, and since the listening windows are different, it may be ensured that time domains of the search spaces do not overlap.

In a possible implementation manner of the present application, determining, according to the configuration information of the first time window and the second time domain offset, the implementation of the configuration information of the second time window may include: and determining the starting position and the window length information of the second time window according to the starting position and the window length information of the first time window and the second time domain offset.

That is, the configuration information of the time window includes a start position and window length information, and as an example, the start position of the first time window may be time-domain shifted based on the second time-domain shift, so that the start position of the second time window is different from the start position of the first time window, thereby ensuring that the time domains do not overlap. In addition, as an example, considering that a total length of the first time window and the second time window may be smaller than a certain time window length threshold, after performing the time domain offset on the start position of the first time window, the window length of the second time window may need to be shortened, so that the window length information of the second time window may also be determined according to the second time domain offset.

The time window length threshold may be preset according to actual requirements, for example, the time window length threshold may be 10 ms.

In another possible implementation manner of the present application, determining the configuration information of the second time window according to the configuration information of the first time window and the second time domain offset may include: and determining the starting position of the second time window according to the starting position of the first time window and the second time domain offset.

That is, the start position of the first time window may be time-domain shifted based on the second time-domain shift, so that the start position of the second time window is different from the start position of the first time window, thereby ensuring that the time domains are not overlapped. As an example, the window length of the second time window may be the same as the window length of the first time window, i.e. the window length information of the first time window may be determined as the window length information of the second time window.

As an example, the second time domain offset may be predefined, or the second time domain offset may also be indicated by the second IAB base station, and for example, the second time domain offset may be indicated to the first IAB base station by the second IAB base station through a system message, which is not limited in this embodiment of the present application.

It should be noted that, here, only time domain shifting is performed on the starting position of the first time window, in another embodiment, the implementation may be further combined with the above embodiments, for example, time domain shifting may be performed on the slot level and/or the symbol level on the first search space configuration information while time domain shifting is performed on the starting position of the first time window, which is not limited in the embodiment of the present application.

Fig. 12 is a flowchart illustrating an information determining method according to an exemplary embodiment, which may be applied in the implementation environment shown in fig. 3, and which may include the following implementation steps:

step 1201: and determining second search space configuration information, wherein the second search space configuration information is used for receiving a search space of a PDCCH corresponding to a second downlink message in the random access process of the first IAB base station.

That is, a set of search space configuration information (i.e., second search space configuration information) may be redefined to configure, through the second search space, a search space that instructs the first IAB base station to receive a PDCCH corresponding to the second downlink message. As an example, the search space of the PDCCH indicated by the second search space configuration information does not overlap with the search space of the PDCCH indicated by the first search space configuration information in a time domain, that is, the monitoring occasions of the PDCCH are different.

As an example, determining implementation of the second search space configuration information may include: and determining a third parameter and/or a fourth parameter in the second search space configuration information, wherein the third parameter is used for indicating a PDCCH monitoring opportunity corresponding to the reception of the second downlink message in the random access process of the first IAB, and the fourth parameter is used for indicating a symbol position of the first IAB for receiving the second downlink message in the same time slot.

For example, the third parameter may be a monitongslotperiodicityandoffset parameter, that is, the parameter may ensure that the search space for the second IAB base station to send the PDCCH corresponding to the second downlink message and the search space for the first IAB base station to send the PDCCH corresponding to the first downlink message have different PDCCH monitoring occasions, that is, the Type1-PDCCH common search space of the first IAB base station and the second IAB base station have different PDCCH monitoring occasions.

As an example, the fourth parameter may be monitorngsymbols within slot parameter, which may guarantee that Type1-PDCCH common search space of the first and second IAB base stations monitor PDCCH on different symbols within the same slot.

It is worth mentioning that, in the embodiment of the present application, corresponding search space configuration information may be configured for the first IAB base station to receive the second downlink message and send the first downlink message, so that the problem of half-duplex limitation of the first IAB base station to receive the second downlink message and send the first downlink message may be solved, and modification of the standard is simplified.

Fig. 13 is a flowchart illustrating an information determining method according to an exemplary embodiment, which may be applied in the implementation environment illustrated in fig. 3, and which may include the following implementation steps:

step 1301: and determining configuration information of a second time window, wherein the configuration information of the second time window is used for indicating the first IAB base station to receive a second downlink message in the corresponding second time window.

As an example, determining configuration information for the second time window may include: the start position and/or window length information of the second time window is determined.

That is, a second time window may be redefined, which may, for example, be different from the first time window in starting position. In implementation, the starting position of the second time window may be determined in two possible implementations as follows:

the first implementation mode comprises the following steps: the starting position of the second time window is located at the first symbol of the nearest control resource set at least N symbols after the last symbol of the PRACH listening opportunity, where N is an integer greater than 1.

After the PRACH monitoring occasion is over, at least two symbols apart, determining a first symbol of a nearest control resource set, and determining the first symbol as a start position of the second time window.

It should be noted that the number of symbols separated between the last symbol of the PRACH monitoring opportunity and the first symbol of the nearest control resource set is different from the number of symbols separated between the last symbol of the PRACH monitoring opportunity and the first symbol of the nearest control resource set when the start position of the first time window is determined, so as to ensure that the start positions of the first time window and the second time window are different.

In addition, since the time window corresponding to the downlink message occurs periodically and there is a control resource set in each period, it is necessary to determine the nearest control resource set, so as to determine the first symbol of the determined control resource set as the starting position of the second time window.

The second implementation mode comprises the following steps: the starting position of the second time window is located in a first symbol of an mth control resource set at least 1 symbol after a last symbol of the PRACH listening opportunity, where M is an integer greater than 1.

That is, the first symbol of the control resource set determined here is not the first symbol of the nearest control resource set, but at least one control resource set apart, and the first symbol of the mth control resource set is determined as the starting position of the second time window, so that the monitoring occasions for the first IAB base station to receive the second downlink message and to transmit the PDCCH corresponding to the first downlink message are different.

Wherein, the control resource set is configured by ra-SearchSpace configuration information.

Further, window length information of the second time window may also be set, and as an example, the configuration of the length information of the second time window may be implemented in the following form:

ra-ResponseWindow ENUMERATED{sl1，sl2，sl4，sl8，sl10，sl20，sl40，sl80}，

the method does not depend on the determination method and the related configuration parameters of the first time window, but defines a new starting position and the related configuration parameters for determining the second time window for the first IAB base station, so that the modification of the standard can be simplified.

It should be noted that, the above is only described by taking redefining the search space configuration information or the time window as an example, in another embodiment, the search space configuration information may be redefined, and the downlink message time window may also be redefined, that is, the above embodiments of fig. 12 and 13 may be combined, and the embodiment of the present application does not limit this.

It should be noted that, for the second IAB base station, it is also necessary to determine the second search space configuration information so as to determine which PDCCH search space the second downlink message is sent on, and an implementation manner of the second IAB base station determining the second search space configuration information corresponds to and is the same as a manner of the first IAB base station determining the second search space configuration information, and a description thereof is not repeated here.

Fig. 14 is a diagram illustrating an information determining apparatus applied to a first IAB base station according to an exemplary embodiment, where the apparatus may include:

a first determining module 1410, configured to determine first PDCCH configuration information, where the first PDCCH configuration information is at least used to indicate a search space of a PDCCH corresponding to a first downlink message sent in a random access process of the first IAB base station; a second determining module 1420, configured to determine second PDCCH configuration information according to the first PDCCH configuration information, where the second PDCCH configuration information is at least used to instruct the first IAB base station to receive a search space of a PDCCH corresponding to a second downlink message.

In a possible implementation manner of the present application, the second determining module 1420 is configured to: determining the second search space configuration information according to the first search space configuration information and the first time domain offset; and/or determining the configuration information of the second time window according to the configuration information of the first time window and the second time domain offset.

In one possible implementation manner of the present application, the second determining module 1420 is configured to: and determining the starting position and the window length information of the second time window according to the starting position and the window length information of the first time window and the second time domain offset.

Referring to fig. 15, fig. 15 is a block diagram illustrating an information determining apparatus applied in a first IAB base station according to an exemplary embodiment, where the apparatus may include:

a third determining module 1510, configured to determine second search space configuration information, and/or determine configuration information of a second time window; the second search space configuration information is used to indicate the first IAB base station to receive a search space of a PDCCH corresponding to a second downlink message in a random access process of the first IAB base station, and the configuration information of the second time window is used to indicate the first IAB base station to receive the second downlink message in the corresponding second time window.

In one possible implementation manner of the present application, the third determining module 1510 is configured to: and determining a third parameter and/or a fourth parameter in the second search space configuration information, where the third parameter is used to indicate a PDCCH monitoring occasion corresponding to receiving a second downlink message in a random access process of the first IAB base station, and the fourth parameter is used to indicate a symbol position where the first IAB base station receives the second downlink message in the same time slot.

In one possible implementation manner of the present application, the third determining module 1510 is configured to: determining a start position and/or window length information of the second time window.

Referring to fig. 16, fig. 16 is a diagram illustrating an information determining apparatus applied in a second IAB base station according to an exemplary embodiment, where the apparatus includes:

a fourth determining module 1610, configured to determine first PDCCH configuration information, where the first PDCCH configuration information is at least used to indicate a search space of a PDCCH corresponding to a first downlink message sent in a random access process of the first IAB base station; a fifth determining module 1620, configured to determine second PDCCH configuration information according to the first PDCCH configuration information, where the second PDCCH configuration information is at least used to indicate that the first IAB base station receives a search space of a PDCCH corresponding to a second downlink message.

In a possible implementation manner of the present application, the fifth determining module 1620 is configured to: determining the second search space configuration information according to the first search space configuration information and the first time domain offset; and/or determining the configuration information of the second time window according to the configuration information of the first time window and the second time domain offset.

In a possible implementation manner of the present application, the timeslot offset is a reference timeslot offset, the reference timeslot offset is greater than or equal to a parameter value of a first parameter, and the first parameter is used to indicate the number of consecutive timeslots for monitoring a physical downlink control channel PDCCH in one period; alternatively, the slot offset is indicated by the second IAB base station.

In a possible implementation manner of the present application, the fifth determining module 1620 is configured to: and determining the starting position and the window length information of the second time window according to the starting position and the window length information of the first time window and the second time domain offset.

Referring to fig. 17, fig. 17 is a block diagram illustrating an information determining apparatus applied in a second IAB base station according to an exemplary embodiment, where the apparatus includes:

a sixth determining module 1710, configured to determine the second search space configuration information, and/or determine the configuration information of the second time window; the second search space configuration information is used to indicate the first IAB base station to receive a search space of a PDCCH corresponding to a second downlink message in a random access process of the first IAB base station, and the configuration information of the second time window is used to indicate the first IAB base station to receive the second downlink message in the corresponding second time window.

In a possible implementation manner of the present application, the sixth determining module 1710 is configured to: and determining a third parameter and/or a fourth parameter in the second search space configuration information, where the third parameter is used to indicate a PDCCH monitoring occasion when the first IAB base station receives a second downlink message, and the fourth parameter is used to indicate a symbol position when the first IAB base station receives the second downlink message in the same time slot.

In one possible implementation manner of the present application, the sixth determining module 1710 is configured to: determining a start position and/or window length information of the second time window.

Referring to fig. 18, a schematic structural diagram of a first IAB base station according to an exemplary embodiment of the present application is shown, where the first IAB base station includes: a processor 1801, a receiver 1802, a transmitter 1803, memory 1804, and a bus 1805.

The processor 1801 includes one or more processing cores, and the processor 1801 executes various functional applications and information processing by executing software programs and modules.

The receiver 1802 and the transmitter 1803 may be implemented as one communication component, which may be a communication chip.

The memory 1804 is coupled to the processor 1801 by a bus 1805.

The memory 1804 may be used to store at least one instruction, which the processor 1801 is used to execute to implement the various steps performed by the first IAB base station in the various method embodiments described above.

Further, memory 1804 may be implemented by any type or combination of volatile or non-volatile storage devices, including, but not limited to: magnetic or optical disks, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), Static Random Access Memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, programmable read-only memory (PROM).

The application provides a computer-readable storage medium, wherein at least one instruction is stored in the storage medium, and the at least one instruction is loaded and executed by the processor to implement the information determination method provided by the above method embodiments.

The present application also provides a computer program product, which when run on a computer causes the computer to execute the information determination method provided by the above-mentioned method embodiments.

Referring to fig. 19, a schematic structural diagram of a second IAB base station provided in an exemplary embodiment of the present application is shown, where the second IAB base station includes: a processor 1901, a receiver 1902, a transmitter 1903, a memory 1904, and a bus 1905.

The processor 1901 includes one or more processing cores, and the processor 1901 executes various functional applications and information processing by running software programs and modules.

The receiver 1902 and the transmitter 1903 may be implemented as one communication component, which may be a communication chip.

The memory 1904 is coupled to the processor 1901 via a bus 1905.

The memory 1904 can be used for storing at least one instruction, and the processor 1901 can be used for executing the at least one instruction to implement the steps performed by the second IAB base station in the above-mentioned method embodiments.

Further, memory 1904 may be implemented by any type or combination of volatile or non-volatile storage devices, including, but not limited to: magnetic or optical disks, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), Static Random Access Memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, programmable read-only memory (PROM).

The present application provides a computer-readable storage medium, in which at least one instruction is stored, and the at least one instruction is loaded and executed by the processor to implement the information determination method provided by the foregoing method embodiments.

Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in the embodiments of the present application may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An information determination method applied to a first access backhaul integrated IAB base station, the method comprising:

determining first Physical Downlink Control Channel (PDCCH) configuration information, wherein the first PDCCH configuration information is at least used for indicating a search space of a PDCCH corresponding to a first downlink message sent in a random access process of the first IAB;

and determining second PDCCH configuration information according to the first PDCCH configuration information, wherein the second PDCCH configuration information is at least used for indicating a search space of a PDCCH corresponding to a second downlink message received in the random access process of the first IAB, and the search spaces of the PDCCHs indicated by the first PDCCH configuration information and the second PDCCH configuration information are separated in a time domain.

2. The method of claim 1,

the first PDCCH configuration information includes configuration information of a first time window corresponding to the first downlink message, and the second PDCCH configuration information includes configuration information of a second time window corresponding to the second downlink message; or,

the first PDCCH configuration information includes first search space configuration information, and the second PDCCH configuration information includes second search space configuration information; or,

the first PDCCH configuration information includes configuration information of a first time window and first search space configuration information corresponding to the first downlink message, and the second PDCCH configuration information includes configuration information of a second time window and second search space configuration information corresponding to the second downlink message.

3. The method of claim 2, wherein the determining second PDCCH configuration information according to the first PDCCH configuration information comprises:

determining the second search space configuration information according to the first search space configuration information and the first time domain offset;

and/or the presence of a gas in the atmosphere,

and determining the configuration information of the second time window according to the configuration information of the first time window and the second time domain offset.

4. The method of claim 3, wherein the first time domain offset comprises a slot offset used to determine a number of slots offset over a slot and/or a symbol offset used to determine a number of symbols offset over symbols within a slot.

5. The method of claim 4,

the time slot offset is a reference time slot offset, the reference time slot offset is greater than or equal to a parameter value of a first parameter, and the first parameter is used for indicating the number of continuous time slots for monitoring a Physical Downlink Control Channel (PDCCH) in one period; or,

the slot offset is indicated by the second IAB base station.

6. The method of claim 4,

the symbol offset is a reference symbol offset, the reference symbol offset is greater than or equal to a parameter value of a second parameter, and the second parameter is used for indicating continuous symbol positions of a Physical Downlink Control Channel (PDCCH) monitored in a period; or,

the symbol offset is indicated by the second IAB base station.

7. The method of claim 3, wherein determining the configuration information for the second time window based on the configuration information for the first time window and the second time domain offset comprises:

determining the starting position and window length information of the second time window according to the starting position and window length information of the first time window and the second time domain offset; or,

and determining the starting position of the second time window according to the starting position of the first time window and the second time domain offset.

8. An information determination method, applied to a second access backhaul integrated IAB base station, includes:

determining first Physical Downlink Control Channel (PDCCH) configuration information, wherein the first PDCCH configuration information is at least used for indicating a search space of a PDCCH corresponding to a first downlink message sent in a random access process of a first IAB (inter-access base station);

9. The method of claim 8,

the first PDCCH configuration information comprises first search space configuration information, and the second PDCCH configuration information comprises second search space configuration information; or,

10. The method of claim 9, wherein the determining second PDCCH configuration information according to the first PDCCH configuration information comprises:

and/or the presence of a gas in the gas,

11. The method of claim 10, wherein the first time domain offset comprises a slot offset used to determine a number of slots offset over a slot and/or a symbol offset used to determine a number of symbols offset over a symbol within a slot.

12. The method of claim 11,

the slot offset is indicated by the second IAB base station.

13. The method of claim 11,

the symbol offset is a reference symbol offset, the reference symbol offset is greater than or equal to a parameter value of a second parameter, and the second parameter is used for indicating continuous symbol positions of a Physical Downlink Control Channel (PDCCH) monitored in one period; or,

the symbol offset is indicated by the second IAB base station.

14. The method of claim 10, wherein determining the configuration information for the second time window based on the configuration information for the first time window and the second time domain offset comprises:

15. An information determination apparatus, for use in a first access backhaul integrated IAB base station, the apparatus comprising:

a first determining module, configured to determine first PDCCH configuration information, where the first PDCCH configuration information is at least used to indicate a search space of a PDCCH corresponding to a first downlink message sent in a random access process of the first IAB base station;

a second determining module, configured to determine second PDCCH configuration information according to the first PDCCH configuration information, where the second PDCCH configuration information is at least used to indicate a search space of a PDCCH corresponding to a second downlink message received in a random access process of the first IAB base station, and the search spaces of PDCCHs indicated by the first PDCCH configuration information and the second PDCCH configuration information are separated in a time domain.

16. The apparatus of claim 15,

17. The apparatus of claim 16, wherein the second determination module is to:

and/or the presence of a gas in the gas,

18. The apparatus of claim 17, wherein the first time domain offset comprises a slot offset used to determine a number of slots offset over a slot and/or a symbol offset used to determine a number of symbols offset over symbols within a slot.

19. The apparatus of claim 18,

the slot offset is indicated by the second IAB base station.

20. The apparatus of claim 18,

the symbol offset is indicated by the second IAB base station.

21. The apparatus of claim 17, wherein the second determining module is to:

22. An information determination apparatus, for use in a second access backhaul integrated IAB base station, the apparatus comprising:

a fourth determining module, configured to determine PDCCH configuration information of a first physical downlink control channel, where the first PDCCH configuration information is at least used to indicate a search space of a PDCCH corresponding to a first downlink message sent in a random access process of a first IAB base station;

a fifth determining module, configured to determine second PDCCH configuration information according to the first PDCCH configuration information, where the second PDCCH configuration information is at least used to indicate a search space of a PDCCH corresponding to a second downlink message received in a random access process of the first IAB base station, and the search spaces of PDCCHs indicated by the first PDCCH configuration information and the second PDCCH configuration information are separated in a time domain.

23. The apparatus of claim 22,

24. The apparatus of claim 23, wherein the fifth determination module is to:

and/or the presence of a gas in the gas,

25. The apparatus of claim 24, wherein the first time domain offset comprises a slot offset used to determine a number of slots offset over a slot and/or a symbol offset used to determine a number of symbols offset over a symbol within a slot.

26. The apparatus of claim 25,

the slot offset is indicated by the second IAB base station.

27. The apparatus of claim 25,

the symbol offset is indicated by the second IAB base station.

28. The apparatus of claim 24, wherein the fifth determination module is to:

29. A communication system comprising a first access backhaul integrated IAB base station and a second IAB base station, the first IAB base station comprising the apparatus of any of claims 15 to 21, the second IAB base station comprising the apparatus of any of claims 22 to 28.

30. A first IAB base station, comprising a processor and a memory, the memory storing at least one instruction for execution by the processor to implement the method of any of claims 1 to 7.

31. A second IAB base station, comprising a processor and a memory, the memory storing at least one instruction for execution by the processor to implement the method of any of claims 8 to 14.

32. A computer-readable storage medium, wherein the storage medium stores at least one instruction for execution by a processor to implement the method of any of claims 1 to 7 or to implement the method of any of claims 8 to 14.