CN109802789B

CN109802789B - Method and equipment for configuring time-frequency domain resources for transmitting common control information

Info

Publication number: CN109802789B
Application number: CN201711147333.7A
Authority: CN
Inventors: 杨拓; 胡丽洁; 吴丹
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2017-11-17
Filing date: 2017-11-17
Publication date: 2021-11-19
Anticipated expiration: 2037-11-17
Also published as: CN109802789A

Abstract

The embodiment of the invention provides a method and equipment for configuring time-frequency domain resources for transmitting common control information, wherein the method comprises the following steps: determining a first control channel resource set (CORESET) for transmitting the Residual Minimum System Information (RMSI); and configuring time-frequency domain resources of a second CORESET used for transmitting other public control information except RMSI according to the first CORESET, and configuring the time-frequency domain resources of the second CORESET for transmitting the public control information on the basis of multiplexing the time-frequency domain resources of the RMSI CORESET, thereby avoiding fragmentation of the data area.

Description

Method and equipment for configuring time-frequency domain resources for transmitting common control information

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for configuring time-frequency domain resources for transmitting common control information.

Background

The Physical Downlink control Channel may be used to indicate a time-frequency domain resource and a transmission parameter of a Physical Downlink Shared Channel (PDSCH) scheduling corresponding to a User Equipment (UE) or a Physical Uplink Shared Channel (PUSCH) scheduling to be sent, where to obtain the messages, the UE needs to first detect the Downlink control Channel.

A Long Term Evolution (LTE) control region occupies the entire bandwidth in a Frequency domain, and occupies the first 3 or 4 Orthogonal Frequency Division Multiplexing (OFDM) symbols (or referred to as a regular subframe) in a time domain. A Physical Downlink Control Channel (PDCCH) of LTE is transmitted on n consecutive Control Channel Elements (CCEs), and each CCE is composed of 9 Resource Element Groups (REGs). The PDCCH has 4 formats, each corresponding to an aggregation level {1, 2, 4, 8}, where the aggregation level indicates the number n of consecutive CCEs occupied by one PDCCH.

A set of PDCCH candidates (candidates) with aggregation levels {1, 2, 4, 8} is defined as a search space, and the UE needs to attempt to decode each PDCCH in the search space according to a downlink control information format (DCI format) to be monitored. The Search Space is divided into a Common Search Space (CSS) and a UE-specific Search Space (UE-specific Search Space). The common search space is used to transmit Control information (cell-level common information) related to Paging (Paging), access Response (RAR), Broadcast Control Channel (BCCH), etc., which is the same for all UEs. The UE-specific search space is used for transmitting control information (UE-level information) related to a Downlink Shared Channel (DL-SCH), an Uplink Shared Channel (UL-SCH), and the like.

In New Radio (NR) design of fifth generation mobile communication (5G), a transmission Resource of a current Control Channel is a Control Channel Resource Set (CORESET), parameters of different CORESETs are configured by a system, such as time-frequency domain resources (Set), and different CORESETs may be different, and a Control Channel is transmitted in the CORESET. CORESET occupies the first 2 or 3 symbols in the time domain, and may be less than or equal to the system bandwidth in the frequency domain. Meanwhile, a plurality of CORESET can be configured for one UE, and the plurality of CORESET can be continuous or discontinuous in the frequency domain. The PDCCH of NR consists of 6 REGs per CCE, and one REG is 1 Resource Block (RB) in the frequency domain and occupies 1 OFDM symbol in the time domain. The transmission scheme of the NR PDCCH is precoder cycling (precoder cycling), and one resource element group bundle (REG bundle) is formed using a plurality of REGs of the same precoder.

In the 5G NR system, common control information includes system messages (SI), Paging and RAR. The System messages include Remaining Minimum System Information (RMSI) and Other System messages (OSI). The core set for scheduling the RMSI is configured by a Physical Broadcast Channel (PBCH) in a synchronization signal Block (SS Block, SSB), and the configuration may include time-frequency domain resources, resource element group bundle size (REG bundle size), and the like. The core of the RMSI is Time Division Multiplexing (TDM) multiplexed with the corresponding SS block, as shown in fig. 1, or Frequency Division Multiplexing (FDM) multiplexed, as shown in fig. 2.

OSIs are further divided into broadcast OSIs (broadcast OSIs) and on demand OSIs (on demand OSIs). The system message window (SI window) of the CORESET broadcasting OSI is configured by RMSI, and the frequency domain position, bandwidth, baseband parameters (numerology) are the same as the CORESET of the corresponding RMSI. The On demand OSI is triggered by message 1(Msg1) or message 3(Msg3), and the base station is configured by signaling.

Currently, the problem to be solved is how to configure the time-frequency domain resources of the CORESET that schedule common control information (e.g., including RMSI, OSI, RAR, or Paging).

Disclosure of Invention

In view of the foregoing technical problems, embodiments of the present invention provide a method and an apparatus for configuring time-frequency domain resources for transmitting common control information, so as to solve the problem of configuring time-frequency domain resources for CORESET that transmits common control information.

In a first aspect, a method for configuring time-frequency domain resources for transmitting common control information is provided, and is applied to a network side device, and includes:

determining a first control channel resource set (CORESET) for transmitting the Residual Minimum System Information (RMSI);

and configuring time-frequency domain resources of a second CORESET for transmitting other common control information except RMSI according to the first CORESET.

Optionally, the configuring, according to the first CORESET, time-frequency domain resources of a second CORESET used for transmitting other common control information except for RMSI includes:

and performing time division multiplexing and/or frequency division multiplexing through the first CORESET and the synchronization information Block SS Block, and configuring time-frequency domain resources of a second CORESET for transmitting other common control information except RMSI.

Optionally, the first CORESET can transmit both RMSI and other common control information;

the frequency domain resources of the second CORESET are configured to: the frequency domain resources are the same as those of the first CORESET;

the time domain resources of the second CORESET are configured to: in a downlink time slot with SS Block transmission, time domain resources are the same as those of the first CORESET; and in a downlink time slot without SS Block transmission, moving the time domain resource to the first N symbols in the downlink time slot, wherein N is greater than 0.

Optionally, the first CORESET can only transmit the RMSI and cannot transmit other common control information;

the second CORESET comprises: a third CORESET for transmitting other system messages OSI and a fourth CORESET for transmitting access responses RAR and/or Paging;

wherein the frequency domain resources of the third CORESET are configured to: the frequency domain resources are the same as those of the first CORESET; the time domain resources of the third CORESET are configured to: m symbols before the beginning of a downlink time slot without SS Block transmission, wherein M is larger than 0;

the time-frequency domain resources of the fourth CORESET are configured to: and expanding the determined extended time-frequency domain resources at the determined time-frequency domain resources of the third CORESET, or the determined extended time-frequency domain resources are the same as the time-frequency domain resources of the third CORESET.

Optionally, the manner of expansion includes one or more of: candidate resource multiple extension, symbol extension and bandwidth extension.

Optionally, the extended time-frequency domain resources are indicated by one or more of: the protocol predefines extended time-frequency domain resources; the physical broadcast channel PBCH indicates extended time-frequency domain resources; the RMSI indicates extended time-frequency domain resources.

In a second aspect, a method for configuring time-frequency domain resources for transmitting common control information is further provided, and is applied to a user equipment, and includes:

and receiving the time-frequency domain resources of a second CORESET configured by the network side equipment and used for transmitting other common control information except the RMSI.

In a third aspect, a method for determining an aggregation level of a remaining minimum system information RMSI control channel resource set, CORESET, is provided, and is applied to a user equipment, and includes:

determining a first CORESET for transmitting the RMSI or a first search space of a control channel scheduling the RMSI, the first CORESET or the first search space being configured by the PBCH;

and determining an aggregation level set used by the first CORESET or a control channel scheduling RMSI according to the resource size of the first CORESET or the size of the first search space.

Optionally, the determining, according to the resource size of the first CORESET or the size of the first search space, an aggregation level set used by the first CORESET or a control channel scheduling RMSI includes:

if the resource size of the first CORESET or the configured searching space of the control channel for scheduling the RMSI is larger than a preset value, determining that the aggregation level set used by the first CORESET or the control channel for scheduling the RMSI is a first aggregation level set; otherwise, determining the aggregation grade set used by the first CORESET or the control channel of the scheduling RMSI as a second aggregation grade set.

In a fourth aspect, a network-side device is further provided, including:

a first determining module, configured to determine a first set of control channel resources, CORESET, for transmitting the RMSI, the first CORESET being configured with PBCH;

and the configuration module is used for configuring time-frequency domain resources of a second CORESET used for transmitting other common control information except the residual minimum system information RMSI according to the first CORESET.

Optionally, the configuration module is further configured to: and performing time division multiplexing and/or frequency division multiplexing through the first CORESET and the synchronization information Block SS Block, and configuring time-frequency domain resources of a second CORESET for transmitting other common control information except RMSI.

the time-frequency domain resources of the fourth CORESET are configured to: and the determined extended time-frequency domain resources are extended in the determined CORESET time-frequency domain resources, or the extended time-frequency domain resources are the same as the time-frequency domain resources of the third CORESET.

In a fifth aspect, there is also provided a user equipment, including:

a second determining module, configured to determine a first CORESET used for transmitting the RMSI or a first search space of a control channel scheduling the RMSI, where the first CORESET or the first search space is configured by a PBCH;

a third determining module, configured to determine, according to the size of the resource of the first CORESET or the size of the first search space, an aggregation level set used by the first CORESET or a control channel of the scheduling RMSI.

Optionally, the third determining module is further configured to: if the resource size of the first CORESET or the configured searching space of the control channel for scheduling the RMSI is larger than a preset value, determining that the aggregation level set used by the first CORESET or the control channel for scheduling the RMSI is a first aggregation level set; otherwise, determining the aggregation grade set used by the first CORESET or the control channel of the scheduling RMSI as a second aggregation grade set.

In a sixth aspect, a network-side device is further provided, including: a memory, a processor and a computer program stored on the memory and operable on the processor, the processor implementing the steps in the method for configuring time-frequency domain resources for transmitting common control information according to the first aspect when executing the program.

In a seventh aspect, there is further provided a user equipment, including: a memory, a processor and a computer program stored on the memory and operable on the processor, the processor implementing the steps in the method for configuring time-frequency domain resources for transmitting common control information according to the first aspect when executing the program; or a step in the method of detecting an aggregation level of a RMSI CORESET according to the third aspect.

In an eighth aspect, there is further provided a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps in the method for configuring time-frequency domain resources for transmitting common control information according to the first aspect; or implementing the steps in the method for configuring time-frequency domain resources for transmitting common control information according to the second aspect; or implementing a step in the method of detecting an aggregation level of an RMSI CORESET as described in the third aspect.

Therefore, on the basis of multiplexing RMSI CORESET time-frequency domain resources, CORESET time-frequency domain resources for transmitting common control information are configured, and fragmentation of a data area is avoided.

Drawings

FIG. 1 is a schematic diagram of TDM multiplexing of RMSI CORESET and SS Block;

FIG. 2 is a schematic diagram of multiplexing of RMSI CORESET and SS Block FDM

FIG. 3 is a block diagram of a wireless communication system according to an embodiment of the present invention;

fig. 4 is a flowchart of a method for configuring time-frequency domain resources for transmitting common control information according to an embodiment of the present invention;

fig. 5 is one of schematic diagrams of TDM multiplexing of core set and SS Block configured by PBCH in the embodiment of the present invention;

fig. 6 is a second schematic diagram of TDM multiplexing of core set and SS Block configured by PBCH according to the embodiment of the present invention;

fig. 7 is one of the schematic diagrams of core set and SS Block FDM multiplexing configured by PBCH in the embodiment of the present invention;

figure 8 is a second schematic diagram of core set and SS Block FDM multiplexing configured by PBCH in an embodiment of the invention;

fig. 9 is a schematic diagram of hybrid multiplexing of core set configured by PBCH with SS Block TDM and FDM in the embodiment of the present invention;

FIG. 10 is a flow chart of a method of determining an aggregation level for RMSI CORESET in an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a network-side device according to an embodiment of the present invention;

FIG. 12 is a diagram illustrating a UE according to an embodiment of the present invention;

fig. 13 is a second schematic structural diagram of a network-side device according to an embodiment of the present invention;

FIG. 14 is a second exemplary diagram of a UE according to the present invention;

fig. 15 is a second flowchart of a method for allocating time-frequency domain resources for transmitting common control information according to an embodiment of the present invention;

fig. 16 is a third schematic structural diagram of a UE according to the embodiment of the present invention.

Detailed Description

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone.

The terms "first" and "second," and the like, in the description and in the claims of embodiments of the present invention are used for distinguishing between different objects and not for describing a particular order of the objects. For example, a first CORESET and a second CORESET, etc. are used to distinguish between different CORESETs and are not used to describe a particular order of CORESETs.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the description of the embodiments of the present invention, the meaning of "a plurality" means two or more unless otherwise specified. For example, a plurality of different aggregation levels refers to two or more different aggregation levels.

The following describes several technical points:

for RMSI CORESET with SS Block TDM multiplexing and RMSI CORESET with SS Block FDM multiplexing:

as shown in fig. 1, the core set and the corresponding SS Block for transmitting the RMSI are TDM multiplexing systems.

As shown in fig. 2, the core set and the corresponding SS Block for transmitting RMSI are multiplexing modes of FDM.

Time-frequency domain resource configuration for CORESET transmitting other common control information:

if the core set transmitting RAR or Paging is configured with RMSI alone, the overhead is large, and if the core set is configured with RMSI completely, the flexibility of configuration is reduced. A simple configuration is to multiplex the frequency domain locations of the RMSI CORESET with each other for transmitting OSI, RAR or Paging, but with different transmission periods.

When RMSI CORESET and SS Block FDM are multiplexed, RMSI CORESET and SS Block are subjected to analog beamforming to obtain beamforming gain. Since the time domain position of SS Block transmission is determined by the pattern of SS Block, when RMSI core and SS Block are FDM multiplexed, the time domain position of RMSI core may appear in the middle OFDM symbols in a slot, but when there is no SS Block transmission in other slots, if OSI core or RAR, Paging core still multiplexes the time domain position of RMSI core, fragmentation of data region may be caused.

Meanwhile, because the transmission periods of the RMSI, OSI, RAR, and Paging are different, if the number of candidate resources of the initially configured RMSI CORESET is small, more candidate resources need to be configured for the RAR, Paging, and other common control information in the subsequent configuration, and the capacity expansion of the CORESET needs to be performed according to the configured RMSI CORESET time-frequency domain resources.

Embodiments of the present invention are described below with reference to the accompanying drawings. The method and the device for configuring the time-frequency domain resource for transmitting the common control information provided by the embodiment of the invention can be applied to a wireless communication system. The wireless communication system may be a system adopting a 5th Generation (5G) mobile communication technology (hereinafter, referred to as a 5G system), and referring to fig. 3, it is a schematic structural diagram of a wireless communication system according to an embodiment of the present invention. As shown in fig. 3, the wireless communication system may include a network side device 30 and a user equipment, for example, the user equipment is denoted as UE31, and the UE31 may communicate with the network side device 30. In practical applications, the connections between the above devices may be wireless connections, and fig. 3 illustrates solid lines for convenience and intuition of the connection relationships between the devices.

It should be noted that the communication system may include a plurality of UEs, and the network side device may communicate (transmit signaling or transmit data) with the plurality of UEs.

The network side device provided in the embodiment of the present invention may be a base station, And the network side device may be a commonly used base station, an evolved node base station (eNB), or a network side device in a 5G system (for example, a next generation base station (gNB) or a Transmission And Reception Point (TRP)).

The user equipment provided by the embodiment of the invention can be a Mobile phone, a tablet Computer, a notebook Computer, an Ultra-Mobile Personal Computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like.

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

Referring to fig. 4, a flowchart of a method for configuring time-frequency domain resources for transmitting common control information is shown in the figure, where an execution subject of the method is a network side device, and the specific steps are as follows:

step 401, determining a first core set for transmitting RMSI, where the first core set is configured by PBCH;

step 402, configuring time-frequency domain resources of a second CORESET for transmitting other common control information except RMSI according to the first CORESET.

The time-frequency domain resources (or referred to as time-frequency domain resource locations) include time domain resources (or referred to as time domain resource locations) and frequency domain resources (or referred to as frequency domain resource locations).

For example: and performing time division multiplexing and/or frequency division multiplexing through the first CORESET and the SS Block, and configuring time-frequency domain resources of a second CORESET for transmitting other common control information except RMSI.

The above-mentioned other common control information other than the RMSI includes: common control information such as OSI, RAR, Paging, etc.

Optionally, the first CORESET may transmit both RMSI and other common control information. The frequency domain resources of the second CORESET may be configured to: the frequency domain resources are the same as those of the first CORESET; and the time domain resources of the second CORESET are configured to: in a downlink time slot with SS Block transmission, time domain resources are the same as those of the first CORESET; and in a downlink time slot without SS Block transmission, moving the time domain resource to the first N symbols in the downlink time slot (slot), wherein N is greater than 0.

Optionally, the first CORESET can only transmit the RMSI and cannot transmit other common control information; the second CORESET comprises: a third CORESET for transmitting OSI and a fourth CORESET for transmitting RAR and/or Paging;

the time-frequency domain resources of the fourth CORESET are configured to: and the determined extended time-frequency domain resources are extended for the determined time-frequency domain resources of the third CORESET, or the resources are the same as the time-frequency domain resources of the third CORESET.

Optionally, the manner of expansion includes one or more of: candidate resource multiple extension, symbol extension, and bandwidth extension.

Optionally, the extended time-frequency domain resources are indicated by one or more of: the protocol predefines extended time-frequency domain resources; PBCH indicates extended time-frequency domain resources; the RMSI indicates extended time-frequency domain resources. For example, the RMSI indication may indicate an extended symbol number, an extended bandwidth, and/or an extended candidate resource multiple.

In the embodiment of the present invention, the CORESET that transmits other common control information (for example, OSI, RAR, Paging, or the like) performs certain multiplexing according to the CORESET time-frequency domain resource configured by PBCH, and specifically, the CORESET and SS Block multiplexing method configured by PBCH is divided into the following schemes:

multiplexing mode one, multiplexing the core set configured by PBCH and SS Block TDM:

1. the CORESET configured by PBCH may transmit both RMSI and common control information such as OSI, RAR, Paging, etc., and the effective time of the CORESET is all downlink available time slots, but the transmission periods of different common control information are different:

1) frequency domain resources: the frequency domain resources of the CORESET configured by PBCH are the same;

2) time domain resources: in a downlink time slot without SS Block transmission, moving the core set time domain resource for transmitting CSS (including RMSI, OSI, RAR, and Paging) to the first few symbols in the downlink time slot, so as to realize fast PDCCH detection while avoiding fragmentation of the following data part, see fig. 5, where the core set for transmitting CSS is located at the first few symbols of each downlink time slot.

2. The core set configured by PBCH can only transmit RMSI, but cannot simultaneously transmit other common control information such as OSI, RAR, paging, etc., and it is necessary to configure time and frequency domain resources of other CSS core sets.

CORESET configured for transport OSI: the frequency domain resources are the same as those of the core set configured by the PBCH for transmitting the RMSI, and the time domain resources are located in the first few symbols of the downlink slot without SS Block transmission. The CORESET is used to transmit OSI when in OSI transmission periods, and may be used to transmit RAR and/or Paging when there are no OSI transmission periods.

And configuring the CORESET used for transmitting the RAR and/or Paging, wherein the part of the time domain resources and the frequency domain resources are expanded on the basis of the determined time domain resources and frequency domain resources of the CORESET. For example: candidate (candidate) resource multiple extension, or symbol extension, or bandwidth extension.

The valid timeslots used for transmitting the core set of RAR and/or Paging may be all downlink timeslots, or may be downlink timeslots without SS block transmission.

For example: the core set time domain resource and frequency domain resource used for transmitting RAR and/or Paging do not conflict with the time domain resource and frequency domain resource of the actually transmitted SS Block, and the core set used for transmitting RAR and/or Paging may be located in all downlink timeslots.

The core set time domain resource and frequency domain resource used for transmitting RAR and/or Paging collide with the time domain resource and frequency domain resource of the actually transmitted SS Block, and then the core set used for transmitting RAR and/or Paging is located in the downlink time slot without SS Block transmission, see fig. 6.

In the embodiment of the present invention, the specific configuration extension CORESET has the following three indication modes:

indicating mode 1, predefining time domain resources and frequency domain resources of extended CORESET by a protocol:

optionally, the protocol predefines the time-frequency domain resources of the extended CORESET, such as the bandwidth, symbol length, starting position, or multiples of the RMSI CORESET of the predefined extended CORESET.

Indication mode 2 and PBCH indication:

optionally, when the PBCH configures a core time domain resource and a frequency domain resource, the PBCH distinguishes between an SS Block transmission slot and a non-SS Block transmission slot, and configures core with different resource sizes in different slots.

For example: the number of OFDM symbols in the CORESET allocated to the SS Block transmission slot is 2, the number of OFDM symbols in the CORESET allocated to the SS Block transmission slot is 3, or the CORESET bandwidth is different between the SS Block transmission slot and the non-SS Block transmission slot.

Indication mode 3, RMSI indication:

in consideration of the cost of limiting PBCH, the method of indicating mode 2 may be simplified to RMSI configuration, and other CORESET may perform frequency domain spreading or time domain symbol spreading on the configured CORESET for transmitting OSI, where the frequency domain or time domain spreading is indicated by RMSI.

Optionally, the RMSI indication may indicate the number of symbols of the extension and/or the bandwidth of the extension and/or the multiple of the extension and/or the combination of the number of symbols, the bandwidth, depending on the number of bits.

For example: RMSI indicates an extended CORESET configuration scheme:

"00" means: time domain spreading by 1 symbol (frequency domain invariant);

"01" means: time domain spreading by 2 symbols (frequency domain invariant);

"10" means: frequency domain spreading by 1 time (time domain invariant);

"11" means: the frequency domain is extended by a factor of 2 (time domain invariant).

Multiplexing mode two, PBCH configuration CORESET and SS Block FDM multiplexing:

1. the core set configured by PBCH can transmit both RMSI and common control information such as OSI, RAR, Paging, etc., and the effective time of the CSS core set is all available downlink time slots, but the transmission periods of different common control information are different:

1) frequency domain resources: the same frequency domain resources as those of the core set configured by PBCH.

2) Time domain resources: in a downlink timeslot without SS Block transmission, the time domain resource for transmitting CSS (including RMSI, OSI, RAR, Paging) core is moved to the first few symbols in the downlink timeslot, so as to implement fast PDCCH detection and avoid fragmentation of the following data part, as shown in fig. 7.

CORESET configured for transport OSI: the frequency domain resources are the same as those of the RMSI CORESET, and the time domain resources are located several symbols before the beginning of the downlink slot without SS Block transmission. The CORESET is used to transmit OSI when in OSI transmission periods, and may be used to transmit RAR and/or Paging when there are no OSI transmission periods.

The CORESET configured to transmit RAR and/or Paging (which may be referred to as a configured extended CORESET), the time and frequency domain resources of the portion of CORESET may be extended based on the time and frequency domain resources already determined for transmitting the CORESET of OSI. For example: candidate resource multiple extension, or symbol extension, or bandwidth extension.

The configured valid timeslots of the extended CORESET may be all downlink timeslots, or may be downlink timeslots without SS Block transmission, for example: the configured time domain resource and frequency domain resource of the extended CORESET do not conflict with the time domain resource and frequency domain resource of the SS Block which is actually transmitted, and then the configured extended CORESET can be located in all downlink time slots.

The configured time domain resource and frequency domain resource of the extended CORESET conflict with the time domain resource and frequency domain resource of the actually transmitted SS Block, and the configured extended CORESET is located in the downlink timeslot without SS Block transmission, see fig. 8.

optionally, the protocol predefines time and frequency domain resources of the extended CORESET, for example, the bandwidth, symbol length, starting position, or a multiple of the RMSI CORESET of the extended CORESET may be predefined.

Indication mode 2 and PBCH indication:

optionally, when configuring the core time domain resource and the frequency domain resource, the PBCH distinguishes between an SS Block transmission slot and a non-SS Block transmission slot, and configures core with different resource sizes in different slots.

For example, the number of OFDM symbols in CORESET allocated to the SS Block transmission slot is 2, the number of OFDM symbols in CORESET allocated to the SS Block transmission slot is 3, or the bandwidth of CORESET allocated to the SS Block transmission slot is different from that of the non-SS Block transmission slot.

Indication mode 3, RMSI indication:

considering the cost of limiting PBCH, the method of indicating mode 2 can be simplified to RMSI configuration, other CORESET can perform frequency domain extension or time domain extension on the CORESET configured for transmitting OSI, the frequency domain/time domain extension can be indicated by RMSI, and the specific RMSI indication can indicate the number of symbols of extension and/or bandwidth of extension and/or multiple of extension and/or combination of number of symbols and bandwidth, depending on the number of bits.

Optionally, the RMSI indicates a configuration scheme of extended CORESET:

one example is as follows:

for the case where the core set for transmitting the RMSI (which may be abbreviated as RMSI core set) is multiplexed with the SS Block FDM, and the bandwidth is uniformly distributed on both sides of the SS Block:

"00" means: the frequency domain is extended to the bandwidth of RMSI CORESET + SS Block, and the number of symbols is the same as the CORESET for transmitting OSI (which may be referred to as OSI CORESET for short).

"01" means: on the basis of expanding the frequency domain to the bandwidth of RMSI CORESET + SS Block, the frequency domain is expanded to two sides by 1 time of the bandwidth of RMSI CORESET, and the number of symbols is the same as that of RMSI CORESET.

"10" means: the symbol ratio is 1 symbol more than RMSI CORESET, the bandwidth is the same as RMSI CORESET bandwidth, in the downlink time slot without SS Block transmission, after one extended symbol CORESET is positioned in OSI CORESET time domain symbol, in the downlink time slot with SS Block transmission, one extended symbol CORESET is positioned in the first symbol at the beginning of the time slot.

"11" means: the symbol ratio is 2 symbols more extended than RMSI CORESET, the bandwidth is the same as RMSI CORESET bandwidth, in the downlink time slot without SS Block transmission, the extended 2 symbols are positioned at OSI CORESET time domain symbols, and in the downlink time slot with SS Block transmission, the extended 2 symbols are positioned at the 2 symbols at the beginning of the time slot.

And a multiplexing mode III, PBCH configuration CORESET and SS Block TDM and FDM mixed multiplexing:

in order to solve the RMSI core capacity problem, a hybrid usage mode of RMSI core and SS Block TDM and FDM may be adopted, that is, the core configured in PBCH is hybrid multiplexed with SS Block TDM and FDM, other common control information (OSI, RAR, Paging, etc.) jointly multiplexes frequency domain resources of RMSI core configured in PBCH, and time domain resources are located in the first few symbols of each slot, as shown in fig. 9.

Thus, on the basis of multiplexing RMSI CORESET time-frequency domain resources, CORESET time-frequency domain resources for transmitting common control information are configured, and the time-frequency domain position is advanced to the first few symbols of each slot. Meanwhile, the configured CORESET can be subjected to multiple, symbol and bandwidth expansion through RMSI.

The implicit indication method of the aggregation level of UE blind detection RMSI CORESET is introduced as follows:

when the UE detects the PDCCH, since the aggregation level used by the PDCCH candidate is unknown, blind detection needs to be performed on different aggregation levels until a correct decoding position is obtained. In NR, a set of multiple different aggregation levels may be configured in PBCH for scheduling RMSI core, taking into account different coverage performances. However, the UE does not know which aggregation levels of PDCCH candidates are used by the base station, and if blind detection is performed on all possible aggregation levels, the overhead of blind detection is large.

In the embodiment of the invention, the UE can implicitly judge the aggregation level set used by the CORESET according to the resource size of the RMSI CORESET configured by the PBCH. Specifically, if the resource size of the RMSI core is greater than L, the UE performs blind detection from the aggregation level in the aggregation level set #1, otherwise, the UE performs blind detection from the aggregation level in the aggregation level set #2, and it should be noted that a specific value of L is not specifically limited in the embodiment of the present invention.

Referring to fig. 10, a flowchart of a method for determining an aggregation level of RMSI CORESET is shown, where an execution subject of the configuration method is a user equipment, and the specific steps are as follows:

step 1001, determining a first CORESET of a first search space for transmitting the RMSI or scheduling a control channel of the RMSI, the first CORESET or the first search space being configured by the PBCH;

step 1002, determining an aggregation level set used by the first CORESET or a control channel scheduling RMSI according to the resource size of the first CORESET or the size of the first search space.

Suppose that: the candidate number agreement for RMSI CORESET specifies 2, for which two aggregation level sets can be configured: and #1 ═ aggregation level 4, aggregation level 8 ═ and #2 ═ aggregation level 8, aggregation level 16.

If the size of the RMSI CORESET configured by the PBCH is larger than 16CCE, the UE only needs to blind-check the aggregation level set #2, that is, only needs to blind-check the aggregation level 8 and the aggregation level 16, otherwise, the UE only needs to blind-check the aggregation level set #1, that is, only needs to blind-check the aggregation level 4 and the aggregation level 8, thereby reducing the blind-check overhead of the UE.

The embodiment of the present invention further provides a network side device, and as the principle of solving the problem of the network side device is similar to the method for configuring the time-frequency domain resource for transmitting the common control information in the embodiment of the present invention, the implementation of the network side device may refer to the implementation of the method, and the repeated parts are not described again.

Referring to fig. 11, the network-side device 1100 includes:

a first determining module 1101 configured to determine a first set of control channel resources, CORESET, for transmitting the RMSI, the first CORESET being configured by PBCH;

a configuring module 1102, configured to configure, according to the first CORESET, a time-frequency domain resource of a second CORESET used for transmitting other common control information except the remaining minimum system information RMSI.

In this embodiment of the present invention, optionally, the configuration module 1102 is further configured to: and performing time division multiplexing and/or frequency division multiplexing through the first CORESET and the synchronization information Block SS Block, and configuring time-frequency domain resources of a second CORESET for transmitting other common control information except RMSI.

In the embodiment of the present invention, optionally, the first CORESET may transmit both the RMSI and other common control information;

In this embodiment of the present invention, optionally, the first CORESET may only transmit the RMSI, and may not transmit other common control information;

wherein the frequency domain resources of the third CORESET are configured to: the frequency domain resources are the same as those of the first CORESET; the time domain resources of the second CORESET are configured to: m symbols before the beginning of a downlink time slot without SS Block transmission, wherein M is larger than 0;

the time-frequency domain resources of the fourth CORESET are configured to: and the determined extended time-frequency domain resources are extended at the determined time-frequency domain resources of the third CORESET, or the resources are the same as the time-frequency domain resources of the third CORESET.

In the embodiment of the present invention, optionally, the extension manner includes one or more of the following: candidate resource multiple extension, symbol extension and bandwidth extension.

In this embodiment of the present invention, optionally, the extended time-frequency domain resource is indicated by one or more of the following ways: the protocol predefines extended time-frequency domain resources; the physical broadcast channel PBCH indicates extended time-frequency domain resources; the RMSI indicates extended time-frequency domain resources.

The network side device provided in this embodiment may execute the method embodiments described above, and the implementation principle and the technical effect are similar, which are not described herein again.

The embodiment of the present invention further provides a ue, and since the principle of the ue for solving the problem is similar to the method for detecting the aggregation level of the RMSI core in the embodiment of the present invention, the implementation of the ue may refer to the implementation of the method, and the repetition is not described again.

Referring to fig. 12, the user equipment 1200 includes:

a second determining module 1201, configured to determine a first CORESET for transmitting the RMSI or a first search space of a control channel scheduling the RMSI, where the first CORESET or the first search space is configured by a PBCH;

a third determining module 1202, configured to determine, according to the resource size of the first CORESET or the size of the first search space, an aggregation level set used by the first CORESET or a control channel of the scheduling RMSI.

In this embodiment of the present invention, optionally, the third determining module 1202 is further configured to: if the resource size of the first CORESET or the configured searching space of the control channel for scheduling the RMSI is larger than a preset value, determining that the aggregation level set used by the first CORESET or the control channel for scheduling the RMSI is a first aggregation level set; otherwise, determining the aggregation grade set used by the first CORESET or the control channel of the scheduling RMSI as a second aggregation grade set.

The user equipment provided in this embodiment may execute the method embodiments described above, and the implementation principle and technical effect are similar, which is not described herein again.

Referring to fig. 13, fig. 13 is a structural diagram of a network side device according to an embodiment of the present invention, and as shown in fig. 13, a network side device 1300 includes: a processor 1301, a transceiver 1302, a memory 1303 and a bus interface, wherein:

in this embodiment of the present invention, the network side device 1300 further includes: a computer program stored on the memory 1303 and executable on the processor 1301, the computer program when executed by the processor 1301 performing the steps of: determining a first CORESET for transmitting RMSI, the first CORESET being configured by PBCH; and configuring time-frequency domain resources of a second CORESET for transmitting other common control information except RMSI according to the first CORESET.

In fig. 13, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1301 and various circuits of memory represented by memory 1303 linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1302 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user equipments.

The processor 1301 is responsible for managing a bus architecture and general processing, and the memory 1303 may store data used by the processor 1301 in performing operations.

Optionally, when executed by the processor 1303, the computer program further implements the following steps: and performing time division multiplexing and/or frequency division multiplexing through the first CORESET and the SS Block, and configuring time-frequency domain resources of a second CORESET for transmitting other common control information except RMSI.

Optionally, when executed by the processor 1303, the computer program further implements the following steps: and receiving the time-frequency domain resources of a second CORESET configured by the network side equipment and used for transmitting other common control information except the RMSI.

As shown in fig. 14, the user equipment 1400 shown in fig. 14 includes: at least one processor 1401, memory 1402, at least one network interface 1404, and a user interface 1403. The various components in user device 1400 are coupled together by a bus system 1405. It will be appreciated that bus system 1405 is used to enable communications among the components connected. The bus system 1405 includes a power bus, a control bus, and a status signal bus, in addition to the data bus. For clarity of illustration, however, the various buses are labeled as bus system 1405 in fig. 14.

User interface 1403 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, trackball, touch pad, or touch screen, among others.

It will be appreciated that the memory 1402 in embodiments of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration, and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data rate Synchronous Dynamic random access memory (ddr DRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 1402 of the systems and methods described in connection with the embodiments of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 1402 holds the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 14021 and application programs 14022.

The operating system 14021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks. The application 14022 contains various applications, such as a Media Player (Media Player), a Browser (Browser), and the like, for implementing various application services. A program implementing a method according to an embodiment of the invention may be included in the application 14022.

In the embodiment of the present invention, by calling the program or instruction stored in the memory 1402, specifically, the program or instruction stored in the application 14022, the following steps are implemented when executing: determining a first CORESET for transmitting the RMSI or a first search space of a control channel scheduling the RMSI, the first CORESET or the first search space being configured by the PBCH; and determining an aggregation level set used by the first CORESET or a control channel scheduling RMSI according to the resource size of the first CORESET or the size of the first search space.

Referring to fig. 15, a flow of a method for configuring time-frequency domain resources for transmitting common control information is shown in the figure, where an execution subject of the method is a user equipment, and the method includes the following specific steps:

step 1501, receiving the time-frequency domain resource of the second core set configured by the network side device for transmitting other common control information except the RMSI.

And the time-frequency domain resource of the second CORESET is configured by the first CORESET used by the network side equipment for transmitting the residual minimum system information RMSI.

In the embodiment of the present invention, optionally, the first CORESET can only transmit the RMSI, and cannot transmit other common control information;

Referring to fig. 16, a structure of a user equipment 1600 is shown, the user equipment 1600 comprising: a receiving module 1601, configured to receive a time-frequency domain resource of a second core set configured by the network side device and used for transmitting other common control information besides the RMSI.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may consist of corresponding software modules that may be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, a removable hard disk, a compact disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in a core network interface device. Of course, the processor and the storage medium may reside as discrete components in a core network interface device.

Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention 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-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims

1. A method for configuring time-frequency domain resources for transmitting common control information is applied to network side equipment, and is characterized by comprising the following steps:

configuring time-frequency domain resources of a second CORESET for transmitting other common control information except RMSI according to the first CORESET;

the first CORESET can transmit RMSI and other common control information; the frequency domain resources of the second CORESET are configured to: the frequency domain resources are the same as those of the first CORESET; the time domain resources of the second CORESET are configured to: in a downlink time slot with SS Block transmission, time domain resources are the same as those of the first CORESET; in a downlink time slot without SS Block transmission, moving the time domain resource to the first N symbols in the downlink time slot, wherein N is greater than 0;

or, the first CORESET can only transmit the RMSI and cannot transmit other common control information; the second CORESET comprises: a third CORESET for transmitting other system messages OSI and a fourth CORESET for transmitting access responses RAR and/or Paging; wherein the frequency domain resources of the third CORESET are configured to: the frequency domain resources are the same as those of the first CORESET; the time domain resources of the third CORESET are configured to: m symbols before the beginning of a downlink time slot without SS Block transmission, wherein M is larger than 0; the time-frequency domain resources of the fourth CORESET are configured to: and expanding the determined extended time-frequency domain resources at the determined time-frequency domain resources of the third CORESET, or the determined extended time-frequency domain resources are the same as the time-frequency domain resources of the third CORESET.

2. The configuration method according to claim 1, wherein the configuring, according to the first CORESET, the time-frequency domain resources of a second CORESET for transmitting other common control information except RMSI comprises:

3. The configuration method according to claim 1, wherein the extended manner comprises one or more of the following: candidate resource multiple extension, symbol extension and bandwidth extension.

4. The method of claim 1, wherein the extended time-frequency domain resources are indicated by one or more of: the protocol predefines extended time-frequency domain resources; the physical broadcast channel PBCH indicates extended time-frequency domain resources; the RMSI indicates extended time-frequency domain resources.

5. A method for configuring time-frequency domain resources for transmitting common control information is applied to user equipment, and is characterized by comprising the following steps:

receiving time-frequency domain resources of a second CORESET configured by the network side equipment and used for transmitting other public control information except RMSI;

the first CORESET can transmit both RMSI and other common control information; the frequency domain resources of the second CORESET are configured to: the frequency domain resources are the same as those of the first CORESET; the time domain resources of the second CORESET are configured to: in a downlink time slot with SS Block transmission, time domain resources are the same as those of the first CORESET; in a downlink time slot without SS Block transmission, moving the time domain resource to the first N symbols in the downlink time slot, wherein N is greater than 0;

6. The configuration method according to claim 5, wherein the extended manner comprises one or more of the following: candidate resource multiple extension, symbol extension and bandwidth extension.

7. The method according to claim 5, wherein the extended time-frequency domain resources are indicated by one or more of: the protocol predefines extended time-frequency domain resources; the physical broadcast channel PBCH indicates extended time-frequency domain resources; the RMSI indicates extended time-frequency domain resources.

8. A method for determining an aggregation level of a Remaining Minimum System Information (RMSI) control channel resource set (CORESET) is applied to user equipment, and the method comprises the following steps:

9. The method of claim 8, wherein determining the first CORESET or the aggregation level set for scheduling RMSI control channel usage according to the first CORESET resource size or the first search space size comprises:

10. A network-side device, comprising:

a first determining module, configured to determine a first control channel resource set, CORESET, for transmitting the RMSI;

the configuration module is used for configuring time-frequency domain resources of a second CORESET used for transmitting other public control information except the residual minimum system information RMSI according to the first CORESET;

11. The network-side device of claim 10, wherein the configuration module is further configured to: and performing time division multiplexing and/or frequency division multiplexing through the first CORESET and the synchronization information Block SS Block, and configuring time-frequency domain resources of a second CORESET for transmitting other common control information except RMSI.

12. The network-side device of claim 10, wherein the manner of expansion includes one or more of the following: candidate resource multiple extension, symbol extension and bandwidth extension.

13. The network-side device of claim 10, wherein the extended time-frequency domain resources are indicated by one or more of: the protocol predefines extended time-frequency domain resources; the physical broadcast channel PBCH indicates extended time-frequency domain resources; the RMSI indicates extended time-frequency domain resources.

14. A user device, comprising:

the receiving module is used for receiving the time-frequency domain resources of a second CORESET which is configured by the network side equipment and used for transmitting other public control information except RMSI;

15. A user device, comprising:

16. The user equipment of claim 15, wherein the third determining module is further configured to: if the resource size of the first CORESET or the configured searching space of the control channel for scheduling the RMSI is larger than a preset value, determining that the aggregation level set used by the first CORESET or the control channel for scheduling the RMSI is a first aggregation level set; otherwise, determining the aggregation grade set used by the first CORESET or the control channel of the scheduling RMSI as a second aggregation grade set.

17. A network-side device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the processor implementing the steps in the method for configuring time-frequency domain resources for transmitting common control information according to any one of claims 1 to 4 when executing the program.

18. A user device, comprising: a memory, a processor and a computer program stored on the memory and operable on the processor, the processor implementing the steps in the method for configuring time-frequency domain resources for transmitting common control information according to any one of claims 5 to 7 when executing the program; or to implement a step in a method for determining the aggregation level of RMSI CORESET as claimed in any one of claims 8 to 9.

19. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps in the method for configuring time-frequency domain resources for transmitting common control information according to any one of claims 1 to 4; or implementing the steps in the method for configuring time-frequency domain resources for transmitting common control information according to any one of claims 5 to 7; or to implement a step in a method for detecting the polymerization level of RMSI CORESET as claimed in any one of claims 8 to 9.