WO2019105192A1

WO2019105192A1 - Control channel pilot frequency generation method, device, equipment, and storage medium

Info

Publication number: WO2019105192A1
Application number: PCT/CN2018/114443
Authority: WO
Inventors: 刘文豪; 郝鹏; 毕峰; 贺海港
Original assignee: 中兴通讯股份有限公司
Priority date: 2017-11-29
Filing date: 2018-11-07
Publication date: 2019-06-06
Also published as: CN109842475A

Abstract

Disclosed in the present application are a control channel pilot frequency generation method, device, equipment, and storage medium, the method comprising: transmitting a broadcast channel and a synchronization signal to a terminal from a preset frequency domain location of a carrier, the broadcast channel comprising a control resource set initially accessed by the terminal; broadcasting frequency domain offset location information of the initially accessed control resource set and the broadcast channel or the synchronization signal by means of the broadcast channel; and after one or more terminals access the control resource set, sending a high-level configuration signaling to the accessing terminals, the high-level configuration signaling comprising another control resource set other than the control resource set initially accessed by the accessing terminals, wherein notification of the frequency domain offset location information of control resources in the other control resource set relative to a carrier start location of the accessing terminals is provided by means of the high-level configuration signaling.

Description

Control channel pilot generation method, device, device and storage medium

Cross-reference to related applications

The present application is based on a Chinese patent application filed on Jan. 29, 2017, the entire disclosure of which is hereby incorporated by reference.

Technical field

The present application relates to, but is not limited to, the field of radio resource configuration technologies, and in particular, to a control channel pilot generation method, apparatus, device, and storage medium.

Background technique

With the continuous advancement of radio technology, a variety of radio services have emerged, and the spectrum resources supported by the radio service are limited. In the face of increasing demand for bandwidth, the traditional commercial communication mainly uses 300MHz to 3GHz. The spectrum resources are extremely tight and cannot meet the needs of future wireless communications.

In the future wireless NR (new radio) communication, the system has flexible adaptability of spectrum, flexibility and forward compatibility of networking, and supports richer applications. For example, some applications require high-throughput transmission, and some applications require high reliability. Some applications require low latency, some applications require more power, some application terminals are limited, and some applications are combinations of these. Therefore, the design of the control channel is also more sophisticated to support complex applications.

The transmission of the control channel requires flexible time-frequency resource configuration to achieve applications such as high reliability, low latency, low power consumption, etc. From the beam condition of the terminal and the base station, diversity or beamforming is required, and different transmission modes are guided. The frequency pattern has different requirements. The diversity method can adopt self-contained or wide-band pilot, and the beamforming method can adopt a self-contained pilot structure.

The flexible pilot structure caused by the flexible resource configuration and transmission mode of the control channel requires that the time-frequency resource location of the control channel is very flexible. For the same terminal or different terminals, multiple control channels may be configured, and time-frequency resources of these control channels may appear. Overlap, these control channels may be transmitted differently, and thus their pilot structures may be different.

For different terminals or the same terminal, multiple time-frequency domain overlapping regions may be configured. In this case, the situation shown in FIG. 1 appears. FIG. 1 is a schematic diagram of overlapping time-frequency resource locations in the related art, in FIG. The two control resource sets (COntrol REsource SET, CORESET) overlap the time-frequency resources. If two CORESETs use different transmission schemes and pilot structures, in this case, the pilot sequence of the same pilot resource location is caused. The definition creates a conflict.

Summary of the invention

In view of this, the embodiments of the present application are directed to providing a control channel pilot generation method, apparatus, device, and storage medium, which solves the problem that a control channel time-frequency resource overlap causes a control sequence to be inconsistent with a pilot sequence.

In a first aspect, the embodiment of the present application provides a control channel pilot generation method, which is applied to a base station, and includes:

And transmitting, by the preset frequency domain location of the carrier, a broadcast channel and a synchronization signal, where the broadcast channel includes a control resource set initially accessed by the terminal; and broadcasting, by using the broadcast channel, the control resource set of the initial access Frequency domain offset position information of a broadcast channel or a synchronization signal;

After the one or more terminals access, the high-level configuration signaling is sent to the access terminal, where the high-level configuration signaling includes: another control resource set other than the initial access control resource set of the access terminal, and And the high frequency configuration signaling is used to notify the frequency domain offset location information of the control resource relative to the carrier start location in the other control resource set of the access terminal.

In a second aspect, the embodiment of the present application provides a method for generating a control channel pilot, which is applied to a base station, and includes:

Transmitting a broadcast channel and a synchronization signal to the terminal in a preset frequency domain position of the carrier, where the broadcast channel includes a control resource set initially accessed by the terminal; and broadcasting, by using the broadcast channel, the initial access control resource set and broadcast Frequency domain offset position information of a channel or a synchronization signal;

After the one or more terminals access, the high-level configuration signaling is sent to the access terminal, where the high-level configuration signaling includes a bandwidth portion (BWP) of multiple sub-carrier spacing configurations, and the pilot is intercepted from the entire carrier. The offset of the sequence.

In a third aspect, an embodiment of the present application provides a method for generating a control channel pilot, which is applied to a terminal, and includes:

Determining a pilot sequence according to the initial access control resource set configured by the received broadcast channel or the synchronization signal and the frequency domain offset position information of the broadcast channel or the synchronization signal;

And determining a pilot sequence of the control resource according to the frequency domain offset location information of the control resource relative to the carrier start location in the other control resource set configured by the received high layer configuration signaling.

In a fourth aspect, the embodiment of the present application provides a control channel pilot generating apparatus, which is configured in a base station, and includes:

a first broadcast module, configured to send a broadcast channel and a synchronization signal to the terminal at a preset frequency domain location of the carrier, where the broadcast channel includes a control resource set initially accessed by the terminal, and a control resource set and broadcast of the initial access Frequency domain offset position information of a channel or a synchronization signal;

The first configuration module is configured to: after the one or more terminals access, send the high-level configuration signaling to the access terminal, where the high-level configuration signaling includes: the access control set of the initial access of the access terminal The other control resource set, and the frequency domain offset location information of the control resource relative to the carrier start location in the other control resource set of the access terminal is notified by using the high layer configuration signaling.

In a fifth aspect, the embodiment of the present application provides a control channel pilot generating apparatus, which is configured in a base station, and includes:

a second broadcast module, configured to send a broadcast channel and a synchronization signal to the terminal at a preset frequency domain location of the carrier, where the broadcast channel includes a control resource set initially accessed by the terminal, and the initial access control resource set and Frequency domain offset position information of a broadcast channel or a synchronization signal;

a second configuration module, configured to send high-level configuration signaling to the access terminal after the one or more terminals access, where the BWP including multiple sub-carrier spacing configurations in the high-level configuration signaling intercepts the pilot sequence from the entire carrier The offset.

In a sixth aspect, the embodiment of the present application provides a control channel pilot generating apparatus, which is configured in a terminal, and includes:

The access module is configured to determine a pilot sequence according to the initial access control resource set configured by the received broadcast channel or the synchronization signal and the frequency domain offset position information of the broadcast channel or the synchronization signal;

And the resource module is configured to determine a pilot sequence of the control resource according to the frequency domain offset location information of the control resource relative to the carrier start location in the other control resource set configured by the received high layer configuration signaling.

In a seventh aspect, the application provides a control channel pilot generating device, including: a memory and a processor;

The memory is configured to save a program for performing control channel pilot generation;

The processor, configured to perform control channel pilot generation, performs the following operations when being read and executed:

Transmitting a broadcast channel and a synchronization signal to the terminal in a preset frequency domain position of the carrier, where the broadcast channel includes: a control resource set initially accessed by the terminal, and the initial access control resource set and the broadcast channel or the synchronization signal Frequency domain offset position information;

In an eighth aspect, an embodiment of the present application provides a storage medium, where a program for performing control channel pilot generation is saved;

The program generated by the control channel pilot performs the following operations when being read and executed:

Applying the above embodiment of the present application has the following beneficial effects:

Applying the foregoing embodiment of the present application, it is possible to solve the pilot sequence generation mechanism that causes the control channel to be inconsistent with the pilot channel due to the overlap of the control channel time-frequency resources. In the new pilot generation mechanism, the pilot sequence can be prevented from appearing in the overlapping region. Ambiguity. Wherein, if the overlapping region is configured for one UE and the two control regions are defined based on different BWPs, or based on the control region itself, the overlapping region generates a DeModulation Reference Signal (DMRS). To understand the ambiguity, it is necessary to agree on the UE behavior of the overlapping region, that is, how the UE determines the final pilot of the overlapping region. If the overlap region is configured for two UEs, the two UEs do not know that the other UE is based on a certain BWP or a pilot sequence defined by the CORESET, resulting in a pilot sequence collision, affecting the delivery of control messages.

DRAWINGS

1 is a schematic diagram of overlapping time-frequency resource locations in the related art;

2 is a flowchart of a method for generating a control channel pilot according to an embodiment of the present application;

3 is a flowchart of a method for generating a control channel pilot according to an embodiment of the present application;

4 is a schematic structural diagram of a control channel pilot generating apparatus according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a control channel pilot generating apparatus according to an embodiment of the present application;

6 is a transmission flowchart of a base station of Embodiment 1;

7 is a flowchart of receiving a terminal of Embodiment 1;

8 is a schematic diagram of a control channel pilot of Embodiment 2;

9 is a schematic diagram of a control channel pilot of Embodiment 3;

10 is a schematic diagram of a control channel pilot of Embodiment 3;

11 is a schematic diagram of a control channel pilot of Embodiment 4;

12 is a schematic diagram of a control channel pilot of Embodiment 5;

13 is a schematic diagram of a control channel pilot of Embodiment 5;

14 is a schematic diagram of a control channel pilot of Embodiment 6;

15 is a schematic diagram of a control channel pilot of Embodiment 7;

16 is a schematic diagram of a control channel pilot of Embodiment 9;

Figure 17 is a diagram showing the control channel pilot of the tenth embodiment.

Detailed ways

In order to make the object, technical solution and beneficial effects of the present application more clear, the embodiments of the present application will be described below with reference to the accompanying drawings, and it should be noted that the embodiments and examples in the present application do not conflict. The features in can be combined with each other arbitrarily.

FIG. 2 is a flowchart of a method for generating a control channel pilot according to an embodiment of the present disclosure. As shown in FIG. 2, the embodiment of the present application provides a method for generating a control channel pilot, which is applied to a base station, and includes:

S101. The broadcast channel and the synchronization signal are sent to the terminal in a preset frequency domain position of the carrier, where the broadcast channel includes a control resource set initially accessed by the terminal, and the initial access control resource is broadcasted by using the broadcast channel. Collecting frequency domain offset position information with a broadcast channel or a synchronization signal;

S102. After the one or more terminals access, send the high-level configuration signaling to the access terminal, where the high-level configuration signaling includes another control resource set except the initial access control resource set of the access terminal. And the high frequency configuration signaling is used to notify the frequency domain offset location information of the control resource relative to the carrier start location in the other control resource set of the access terminal.

In order to adapt to the flexibility of the spectrum, the NR of the control channel (a set of parameters used by the communication system, including subcarrier spacing, symbol length, Cyclic Prefix (CP) length, etc.) can be flexibly configured with different frequency bands, for example in The low frequency band uses a small subcarrier spacing to accommodate large delay spreads, and the high frequency band uses a larger subcarrier spacing to resist phase noise.

In order to adapt to the flexibility and forward compatibility of the networking, the NR can be configured with control channel resources. The control channel can flexibly configure certain resources. This configuration can be done through high layer and/or control signaling.

NR To support high throughput applications, the control channel can be configured with a wider activation bandwidth for high throughput data transmission.

In order to support highly reliable applications, NR firstly has a very reliable control channel, including multi-beam transmission mechanism, larger aggregation level, time domain repetition, and large bandwidth range spread spectrum.

In order to support low-latency applications, the NR requires that the transmission of the control channel be adapted to the minimum delay requirement of the service data, so that the control channel cannot be started only at the fixed subframe start position like Long Term Evolution (LTE). Orthogonal Frequency Division Multiplexing (OFDM) appears on the symbol. One way is to embed low-latency services in the normal service transmission process. This method is called preemption. This method requires that the control channel cannot appear only at the beginning of a subframe or time slot. The location and period of the time-frequency resources are more flexible than LTE.

In order to support energy-saving applications, NR requires data transmission in the form of energy-saving as much as possible when controlling the scheduling of service data. One way is the cross-slot mode. In this way, the terminal immediately closes the RF link when receiving the symbol of the control channel. To achieve the purpose of power saving, another way is to configure the bandwidth monitored by the terminal in the active state and the inactive state to be flexibly switched, for example, to operate in a small state in an idle state, in which the terminal only performs small bandwidth. The control channel monitors the energy saving purpose. When working in the active mode, the data transmission is completed as soon as possible under the operation of a larger bandwidth.

In order to support reliable transmission, the NR requires the control channel to provide reliability through multi-dimensional diversity. For example, spatially using multiple preferred beams to transmit control messages for the terminal, time to repeatedly improve coverage, and frequency domain to spread by large bandwidth. Implement coverage enhancements.

From the above analysis, it can be seen that the future wireless communication requires control channels. The main control channels are flexible. The flexibility here includes:

i) The flexibility of the resource location, compared to the relatively fixed control channel of LTE, the control channel of the NR requires more flexible time-frequency resource configuration. In order to achieve flexible configuration, application-specific control channels can be configured for different users, for example, high. The reliability of the service configuration is high bandwidth and low monitoring and monitoring time.

Ii) The flexibility of the transmission mode. Before the terminal and the base station perform beam training, the terminal can perform control channel transmission in a diversity manner. After the terminal and the base station perform beam training, the base station can transmit the control channel by beamforming. Diversity transmission is divided into delay diversity and beam polling transmission. Beamforming can be used to control the transmission of the control channel based on the preferred beam and the preferred frequency band. Therefore, centralized resources are used to improve performance. For the diversity transmission mode, the terminal and the base station do not know the optimal preferred beam and preferred frequency band. A reliable way to transmit in the form of frequency domain diversity.

In the embodiment of the present application, the initial access control resource set and the other control resource set pilot sequence are generated by using the same or different initialization identifiers (IDentifications, IDs);

When the initial control resource set does not overlap with the frequency domain resources of the other control resource set, the initial control resource set is the same as or different from the pilot initialization ID of the other control resource set;

When the initial control resource set overlaps with other frequency resource resources of the control resource set, and the initial control resource set works simultaneously with other control resource sets, the pilot of the initial control resource set and other control resource sets The initialization ID is the same.

In the embodiment of the present application, when the initial control resource set and the other control resource set adopt the same pilot initialization ID, according to the frequency domain relative offset and the common reference frequency of the initial control resource set and other control resource sets. Generate and map pilot sequences.

In the embodiment of the present application, when the initial control resource set overlaps with the frequency domain resources of other control resource sets, and the initial control resource set works simultaneously with other control resource sets, the overlapping frequency domain resources are used. a pilot sequence of the initially accessed control resource set.

In the embodiment of the present application, for different terminals or different control resource sets of the same terminal, a pilot sequence generation manner of other control resource sets is configured by using high-level parameters.

In this embodiment of the present application, the common reference frequency point includes one of: a starting frequency domain position of a broadcast channel or a synchronization signal, a central frequency domain position of a broadcast channel or a synchronization signal, and a termination frequency domain position of a broadcast channel or a synchronization signal. , the frequency domain position of the carrier absolute index.

In this embodiment of the present application, generating and mapping a pilot sequence according to the frequency domain relative offset and the common reference frequency point of the initial control resource set and other control resource sets includes:

When mapping with a common reference frequency point, the pilot sequence index and the index of the pilot carrier are placed in a cyclic modulo manner.

In the embodiment of the present application, when the length of the generated pilot sequence is greater than the carrier bandwidth, the common reference frequency point corresponds to a pilot sequence of a fixed position in the pilot sequence.

In the embodiment of the present application, for different control channels of different terminals or the same terminal, generating pilot sequences of other control resource sets by using high-level configuration parameters includes:

A pilot sequence of other control resource sets is generated according to the configured pilot sequence generation ID, the default pilot sequence generation ID, or the broadband identification field.

In the embodiment of the present application, for different terminals or different control channels of the same terminal, when different terminal or different control resource sets of different control channels overlap and different terminals or other control resource sets of different control channels work simultaneously, the enable field is enabled. Set to generate a pilot sequence based on the default or configured ID.

In the embodiment of the present application, the fixed position of the common reference frequency point corresponding to the pilot sequence is a sequence corresponding to an intermediate position of the pilot sequence.

The embodiment of the present application further provides a control channel pilot generation method, which is applied to a base station, and includes:

After the one or more terminals access, the high-level configuration signaling is sent to the access terminal, where the high-level configuration signaling includes a BWP that is configured by multiple sub-carrier spacings to intercept the offset of the pilot sequence from the entire carrier.

The high-level configuration signaling further includes: carrier spacing information.

As shown in FIG. 3, the embodiment of the present application further provides a method for generating a control channel pilot, which is applied to a terminal, and includes:

S201. Determine a pilot sequence according to the initial access control resource set configured according to the received broadcast channel or the synchronization signal and the frequency domain offset position information of the broadcast channel or the synchronization signal.

S202. Determine a pilot sequence of the control resource according to the frequency domain offset location information of the control resource relative to the carrier start location in the other control resource set configured by the received high layer configuration signaling.

In the embodiment of the present application, the terminal receives the high-level configuration signaling to learn the interception pilot sequence offset of the control channel resource set received by the terminal;

Determining a pilot sequence on the control resource set according to the received control channel resource set relative to the carrier start offset and the pilot sequence intercept offset.

In the embodiment of the present application, when the initial control resource set overlaps with the frequency domain resources of the other control resource set, and the initial control resource set works simultaneously with other control resource sets, the overlapping frequency domain resource adopts A pilot sequence of a set of control resources initially accessed.

In the embodiment of the present application, when mapping is performed by using a common reference frequency point, the pilot sequence index and the index of the pilot carrier are selected in a cyclic modulo manner.

In this embodiment of the present application, a pilot sequence is generated in a manner that is greater than a carrier bandwidth length, where the common reference frequency point corresponds to a pilot sequence of a fixed position in the pilot sequence.

As shown in FIG. 4, the embodiment of the present application further provides a control channel pilot generating apparatus, which is disposed at a base station, and includes:

a first configuration module, configured to send high-level configuration signaling to the access terminal after the one or more terminals access, where the high-level configuration signaling includes the control resource set of the initial access of the access terminal The other control resource set, and the frequency domain offset location information of the control resource relative to the carrier start location in the other control resource set of the access terminal is notified by the high layer configuration signaling.

The initially accessed control resource set is generated by using the same or different initialization IDs as the pilot sequences of other control resource sets;

When mapping with a common reference frequency point, the pilot sequence index and the index of the pilot carrier correspond in a cyclic modulo manner.

In the embodiment of the present application, for different terminals or different control channels of the same terminal, when different terminal or different control resource sets of different control channels overlap, and different terminals or other control resource sets of different control channels work simultaneously, enable The field is set and the pilot sequence is generated according to the default or configured ID.

The common reference frequency point corresponds to a fixed position of the pilot sequence, and is a sequence corresponding to an intermediate position of the pilot sequence.

And transmitting, by the preset frequency domain location of the carrier, a broadcast channel and a synchronization signal, where the broadcast channel includes a control resource set initially accessed by the terminal, and a frequency domain of the initial access control resource set and a broadcast channel or a synchronization signal. Offset position information;

The embodiment of the present application further provides a control channel pilot generating apparatus, which is disposed at a base station, and includes:

The second configuration module is configured to: after the one or more terminals access, send the high-level configuration signaling to the access terminal, where the high-level configuration signaling includes: the BWP configured by multiple sub-carrier spacing intercepts the pilot from the entire carrier The offset of the sequence.

As shown in FIG. 5, the embodiment of the present application further provides a control channel pilot generating apparatus, which is installed in a terminal, and includes:

The embodiment of the present application further provides a control channel pilot generating device, including: a memory and a processor; wherein:

The embodiment of the present application further provides a storage medium, and stores a program for performing control channel pilot generation;

After the one or more terminals access, the high-level configuration signaling is sent to the access terminal, where the high-level configuration signaling includes another control resource set other than the initial access control resource set of the access terminal, and passes the The high-level configuration signaling notifies the frequency domain offset location information of the control resource relative to the carrier start location in the other control resource set of the access terminal.

Example 1

As shown in FIG. 1, the base station transmits a synchronization signal (SS, Synchronization Signal)/Physical Broadcast Channel (PBCH) at a specific frequency domain position of one carrier, and the base station notifies the remaining minimum system information control for initial access through the PBCH. RMSI CORESET (Remaining Minimum System Information Control Resource Set), the notified RMSI CORESET is the frequency domain position offset with respect to SS/PBCH. In Figure 1, number 1 shows CORESET for UE1 WITH DMRS (Demodulation Reference) Signal) in PDCCH (Physical Downlink Control Channel), number 2 shows CORESET for UE2 with DRMS in CORESET.

The base station configures other CORESETs for the terminal through high-level signaling, and the base station simultaneously informs the frequency domain positions of other CORESETs relative to the frequency domain offset of the SS/PBCH.

6 is a flow chart of transmitting a base station according to an embodiment of the present application. In FIG. 6, the RMSI CORESET is CORESET 1, and the CORESET configured by the high-level signaling is CORESET 2. The transmission mode of the CORESET 1 is small cyclic delay diversity (sCDD). , small Cyclic Delay Diversity) The pilot structure is a broadband pilot, the CORESET 2 transmission mode is precoder cycling, and the pilot structure is a self-contained structure. The number 1 in Fig. 6 is a control resource set (CORESET by RRC signal) from a radio resource control (RRC) signal.

The base station determines the pilot sequence according to the frequency domain position offset of the CORESET 1 and the SS/PBCH, for example, the lowest frequency domain index corresponding resource block (RB) of the CORESET 1 and the offset value of the RB corresponding to the lowest frequency domain index of the SS Recorded as offSet1, the base station generates a pilot sequence according to the cell ID as [s0, s1, ..., sN-1], where N is the length of the pilot sequence corresponding to the maximum bandwidth supported by the carrier frequency, and the pilot density is recorded. For RSD, the maximum bandwidth is recorded as BWmax, then N = BWmax * RSD. The base station determines that the pilot sequence of CORESET1 is [si,...,sj] according to offset1 and pilot density RSD. The bandwidth corresponding to CORESET1 is recorded as BWcoreset

Where i=offset1*RSD, j=offset1*RSD+BWcoreset*RSD-1.

The base station generates a sequence on CORESET1 as described above and maps it to the corresponding pilot carrier.

For CORESET2, the base station calculates the offset of the offset and the pilot index in the same manner. Since the base station generates the pilot index according to the same offset, it can ensure that the pilot sequences of the two CORESETs in the overlapping part are the same value.

FIG. 7 is a flowchart of receiving a terminal according to an embodiment of the present application, as shown in FIG. 7 .

In step 1, the terminal performs downlink synchronization and broadcast reading.

In step 2, the terminal confirms the time-frequency resource location of CORESET1 based on the broadcasted information.

In step 3, the terminal determines the pilot sequence of CORESET1.

When the downlink synchronization is completed, the terminal acquires the frequency domain resource location of the downlink synchronization signal, and the terminal determines the lowest frequency domain RB index of CORESET1 and the lowest frequency domain RB index of the downlink synchronization to calculate the relative offset offset of CORESET1. The terminal determines the pilot sequence of CORESET1 based on the relative offset offset and the pilot density RSD.

In step 4, the terminal receives the high layer signaling sent by the base station, and learns the time-frequency resource configuration of the CORESET2.

In step 5, the terminal determines the pilot sequence corresponding to CORESET2 according to the frequency domain RB offset of CORESET2 and the synchronization signal.

Example 2

Generating a pilot sequence using the same reference point within the carrier

In this embodiment, the base station uses a common pilot offset for all CORESETs to ensure that the pilot sequence of the overlapping region does not appear ambiguous.

In the first step, the base station provides an initial reference point for the control channel pilot generation by using the downlink synchronization. FIG. 8 is a schematic diagram of the control channel pilot provided by the embodiment of the present application, as shown in FIG. The RB corresponding to the lowest frequency domain index of the downlink synchronization is used as a reference position for generating a pilot sequence.

The reference point may also select an RB index of the center frequency domain of the synchronization channel, or an RB index of the highest frequency domain of the synchronization signal, or an RB index corresponding to the lowest frequency domain index of the frequency domain in which the broadcast channel is located, or an RB index of the center frequency of the broadcast channel. Or the RB index corresponding to the highest frequency domain index of the broadcast channel.

The base station generates a pilot sequence [s0, s1, ..., sN-1] of the entire carrier bandwidth according to the maximum bandwidth of the carrier frequency, where N=BWmax*RSD, and BWmax is the maximum bandwidth corresponding to the carrier.

In step 2, the base station notifies the time-frequency resource location of the CORESET1 through the broadcast channel, and the base station determines the pilot sequence on the CORESET1 according to the offset value of the frequency domain start position of the CORESET1 and the carrier frequency domain reference position [si,... , sj], where i and j are part of the entire carrier bandwidth pilot sequence described above. i=offset1*RSD, j=offset1*RSD+BWcoreset1*RSD-1, where BWcoreset1 is the bandwidth of CORESET1, and RSD is the pilot density of the control channel. Here, 3RS per REG, REG occupies 12 REs in the frequency domain. The time domain is an OFDM symbol.

In step 3, the base station configures the time-frequency resource location of the CORESET2 for the terminal through high-level signaling, and the base station determines the pilot sequence of the CORESET2 by determining the offset offset2 from the reference frequency domain position according to the lowest frequency domain index of the CORESET. [sm,...,sn], where m and n are part of the entire carrier bandwidth pilot sequence described above. m=offset2*RSD, j=offset2*RSD+BWcoreset1*RSD-1, where BWcoreset1 is the bandwidth of CORESET1, and RSD is the pilot density of the control channel. Here, 3RS per REG, REG occupies 12 REs in the frequency domain. The time domain is an OFDM symbol.

Terminal side,

In step 1, the terminal performs downlink synchronization to obtain the frequency domain location of the downlink synchronization, including the RB index corresponding to the lowest frequency domain carrier index of the downlink synchronization or the RB index corresponding to the highest index of the frequency domain carrier of the downlink synchronization, or downlink synchronization. The RB index corresponding to the center carrier.

The terminal generates a pilot sequence [s0, . . . , sN-1] corresponding to the maximum bandwidth of the carrier according to the cell ID acquired in the downlink synchronization process.

The terminal determines the time-frequency resource location of the downlink broadcast according to the correspondence between the downlink synchronization and the downlink broadcast, and the agreement relationship between the downlink broadcast and the downlink synchronization time-frequency resource may be the same in the frequency domain location center carrier position, and the PBCH adopts different synchronization with the downlink. The number of carriers or RBs.

The time domain location of the broadcast can also locate the start and end positions of the broadcast symbols by the contractual relationship of the downlink synchronization.

In step 2, the terminal determines the time-frequency resource location of the broadcast through the correspondence between the downlink synchronization and the broadcast, and reads the broadcast message to obtain the time-frequency resource location of the CORESET1.

In step 3, the terminal determines the pilot sequence [si,...,sj] on CORESET1 according to the offset value of the frequency domain start position of CORESET1 and the carrier frequency domain reference position, where i and j are the entire carrier described above. Part of the bandwidth pilot sequence. i=offset1*RSD, j=offset1*RSD+BWcoreset1*RSD-1, where BWcoreset1 is the bandwidth of CORESET1, and RSD is the pilot density of the control channel. Here, 3RS per REG, REG occupies 12 REs in the frequency domain. The time domain is an OFDM symbol.

In step 4, the terminal determines the time-frequency resource location of the CORESET2 configured by the high layer signaling by receiving the high layer signaling.

In step 5, the terminal determines the pilot sequence [sm,...,sn] on the CORESET2 according to the offset value of the frequency domain start position of the CORESET2 and the carrier frequency domain reference position, where m and n are the entire carrier. The index of the bandwidth pilot sequence. m=offset2*RSD, n=offset2*RSD+BWcoreset2*RSD-1, where BWcoreset2 is the bandwidth of CORESET2 configured by higher layer signaling, and RSD is the pilot density of the control channel, where 3RS per REG and REG are in the frequency domain It occupies 12 REs and is an OFDM symbol in the time domain.

Example 3

In this embodiment, there are multiple BWPs on one carrier, and the terminal performs data transmission and reception based on the BWP in the carrier. Different BWPs may have different CORESET configurations.

The base station divides multiple BWPs on one carrier. For the UE, there is only one active BWP at a certain time, but for multiple UEs, there may be multiple activated BWPs, so that multiple base stations may serve multiple terminals. Activated BWP.

As shown in FIG. 9 , FIG. 9 is a schematic diagram of a control channel pilot according to an embodiment of the present application. Referring to FIG. 9 , a base station allocates a CORESET1 with a bandwidth equal to a BWP on the BWP 1 , and the base station allocates a bandwidth greater than BWP1 for a terminal. BWP2, and BWP2 is also configured with a bandwidth equal to CORESET2

The base station generates a DMRS sequence [s0, s1, ..., sN-1] of the CORESET existing in BWP1, N=BW_coreset1*RSD, where BW_coreset1 is the bandwidth of CORESET1, and the sequence of the generated sequence on CORESET1 is as shown in FIG. 10 is a schematic diagram of a control channel pilot provided by an embodiment of the present application, as shown in FIG. 10:

In Figure 10, the frequency domain of BWP2 includes BWP1 frequency domain resources, and there are some resources in the lower frequency band BWP2, and the CORESET bandwidth on BWP1 is BWP1.

For CORESET1 in BWP1, the pilot sequence is generated according to the bandwidth of BWP1, and the generated pilot sequence is placed in the order from low frequency to high frequency to corresponding frequency domain resources s0, s1, ..., sN-1.

In an embodiment, the base station configures the control resource set CORESET2 for the terminal by using the high layer signaling, and the corresponding frequency domain bandwidth is the same as that of the BWP2. At this time, the base station generates the pilot sequence according to the bandwidth of the CORESET2 [s0, s1, ... sN-1 , sN,...sN'-1] where N'=BW_coreset2*RSD, the terminal places the pilot from the start position of CORESET1 when mapping the pilot sequence, and the result of the mapping is the coincident CORESET region on BWP1 and BWP2. The pilot sequence is the same. For low frequency regions of BWP2 beyond BWP1, the base station maps the sN, ... sN'-1 sequence onto the pilot carrier. The corresponding expression is RE(mod(k+offset, BW_coreset2))=RS(k), where k is the index number of the CORESET2 pilot position, and mod is the modulo operation. The final mapping result is shown in Figure 10.

Example 4

In this embodiment, the base station first configures the CORESET for initial access, called RMSI CORESET, and the base station cannot configure the bandwidth of the carrier for the terminal before the completion of the interaction with the terminal, and the absolute starting position of the CORESET or BWP relative carrier. The parameters initialized by the user pilot sequence.

At this time, the base station initializes the pilot sequence of the RMSI CORESET according to the cell ID, and the sequence length is the sequence length corresponding to the RMSI CORESET. After the terminal and the base station complete the interaction, the base station can configure another CORESET through the terminal, which is recorded as CORESET2. The base station configures the following attributes of CORESET2:

1) ID for sequence generation, denoted as ID_coreset;

2) The time-frequency resource location of CORESET;

3) an offset of the starting position of the frequency domain of the CORESET relative to the starting index of the carrier bandwidth;

4) RMSI CORESET time-frequency resource location.

After the terminal completes the access, the base station can inform the RMSI CORESET and other CORESETs relative to the PRB0 offset through higher layer signaling.

The base station generates a pilot sequence corresponding to the bandwidth of CORESET2 based on ID_coreset2. When the pilot sequence of CORESET2 conflicts with the pilot sequence of RMSI CORESET, the pilot reserves the pilot of RMSI CORESET, and shields the pilot sequence of CORESET2.

For example, FIG. 11 is a schematic diagram of a control channel pilot provided by an embodiment of the present application. In FIG. 11, a base station first generates a pilot sequence corresponding to an RMSI CORESET according to a cell ID. After the terminal in the network completes the initial access, the base station can configure an additional CORESET for it. If these CORESETs overlap with the CORESET of the RMSI, the pilot sequence of the RMSI CORESET is reserved, and the other CORESETs are masked at the overlapping position. Pilots.

Terminal side,

In step 1, the terminal first performs downlink synchronization, acquires time-frequency synchronization and cell ID, and the terminal determines the location of the broadcast channel by the position of the downlink synchronization, and reads the time-frequency resource location of the RMSI CORESET, and the bandwidth of the RMSI CORESET is recorded as bw_RMSI;

In step 2, the terminal generates a pilot sequence [s0, s1, ... sN-1] corresponding to the RMSI CORESET bandwidth according to the cell ID, where N = bw_RMSI * RSD. The RSD is the pilot density of the PDCCH, where the pilot density is 3RS per REG, and the terminal reads the system message to obtain configuration information necessary for initial access;

In step 3, the terminal accesses the network, receives the high-level signaling configured by the base station, determines the location of the time-frequency resource of the high-level configuration CORESET, and the CORESET is recorded as CORESET2, and the bandwidth is recorded as bw_coreset2;

The terminal receiving high layer signaling further includes an offset offset_coreset2_prb0 of the CORESET2 relative to the entire carrier absolute frequency domain index start position PRB0, and the terminal further learns the offset RMSI CORESET offset PR_0 offset_RMSIcoreset_prb0 by the higher layer signaling.

In step 4,

The terminal determines the overlap position of CORESET2 and RMSI CORESET according to offset_coreset2_prb0, offset_coreset2_prb0, bw_RMSI and bw_coreset2.

In step 5, when receiving the control channel configured by the high-level signaling, the terminal first determines whether the control channel configured by the high-level signaling and the control channel of the RMSI overlap in the frequency domain, and if there is an overlap, according to the overlap region The RMSI CORSET performs channel estimation for the pilot.

Example 5

If the CORESET and the BWP are both present, we assume that the bandwidth of the CORESET is the same as the bandwidth of the BWP, and the bandwidth of the two is different. FIG. 12 is a schematic diagram of the pilot of the control channel provided in the embodiment of the present application, as shown in FIG.

The base station first defines the configuration of the BWP. There are two BWPs in FIG. 12, where the BWP carrying the RMSI and the other BWP have overlapping regions in the frequency domain, and the two BWPs are respectively recorded as BWP1 and BWP2. In this embodiment, the CORESETs of the two BWPs are not related to the absolute index of the frequency domain start position of the carrier bandwidth.

In this embodiment, the base station first configures the CORESET for initial access, which is called RMSI CORESET. The bandwidth range in which the CORESET is located is called the initial BWP. After the terminal completes the interaction, the base station configures the terminal by the higher layer signaling. A BWP with a bandwidth greater than the initial BWP and overlapping the initial BWP, this BWP is denoted as BWP2. The offset of the BWP2 and the PRB0 is configured by the high-level signaling base station, and the base station configures the specific frequency domain position of the CORESET2 in the BWP2.

The base station initializes the pilot sequence of the RMSI CORESET according to the cell ID, and the sequence length is the sequence length corresponding to the RMSI CORESET. After the terminal and the base station complete the interaction, the base station can configure another BWP through the terminal, which is recorded as BWP2. The base station configures the following attributes of BWP2:

1) The time-frequency resource location of the BWP;

2) an offset of the start position of the frequency domain of the BWP with respect to the start index of the carrier bandwidth PRB0;

3) The CORESET position in the BWP relative to the frequency domain position of the BWP.

After the terminal completes the access, the base station can configure additional BWPs and corresponding CORESETs in other BWPs through higher layer signaling. The base station can also inform the RMSI CORESET relative to the frequency domain offset offset_RSMI_PRB0 of PRB0.

The base station generates a pilot sequence [s0, s1, ... sN-1] for BWP2 based on ID_bwp2, where N = bw_bwp2 * RSD, where bw_bwp2 is the bandwidth of BWP2 and RSD is the pilot density. The CORESET configured by the base station for BWP2 is recorded as CORESET2, and the corresponding bandwidth is recorded as bw_coreset2. The offset of the frequency domain position relative to the initial frequency domain resource RB index of the BWP2 is recorded as offset_bwp2, and the base station allocates offset_bwp2 and bw_coreset2 to the terminal through high layer signaling.

The base station calculates the frequency domain carrier position of the CORESET2 of the BWP2. If the frequency domain position conflicts with the RMSI CORESET pilot sequence of the BWP1, the base station reserves the RMSI CORESET pilot sequence of the BWP1 in the collision area, and maps the corresponding guide of the CORESET2 in the non-overlapping area. Frequency sequence.

For example, in FIG. 12, the base station first generates a pilot sequence corresponding to the RMSI CORESET according to the cell ID. After the terminal completes the initial access, the base station configures the BWP2 and the corresponding CORESET2 for the base station, and the base station calculates the pilot sequence corresponding to the unoverlapping region according to the offset of the BWP and the frequency offset of the CORESET2 and the BWP2 of the BWP2, when the non-overlapping region For the low frequency part, the pilot index of the non-overlapping region is [s0, s1, ... sK], where K = (offset + offset_bwp2) * RSD; when the non-overlapping region is a high frequency portion, non-overlapping The pilot of the region is [sk, sk+1, ... sN], when k = (offset1 + bw_overlap) * RSD, N = (offset1 + bw_overlap) * RSD, where offset1 is the starting position of CORESET2 relative to CORESET2 Offset, bw_overlap is the bandwidth occupied by the overlap region. FIG. 13 is a schematic diagram of a control channel pilot provided by an embodiment of the present application, as shown in FIG.

In this embodiment, the frequency domain resource of BWP2 includes the frequency domain resource of BWP1. In other cases, the bandwidth of BWP2 and BWP1 is the same, the CORESET in the two BWPs is also the same, or BWP2 is greater than BWP1 but the two parts overlap, and BWP1 occupies more. In the high (low) carrier frequency region, BWP2 occupies more low (high) carrier frequency regions. The generation of pilot sequences for these overlapping cases will not be described again. The idea is to calculate the actual overlap position based on the offset and preserve a pilot of CORESET at the overlap position. The calculation process is basically consistent with the foregoing.

Terminal side,

In step 1, the terminal first performs downlink synchronization, acquires time-frequency synchronization and cell ID, and the terminal determines the location of the broadcast channel by the location of the downlink synchronization, reads the time-frequency resource location of the RMSI CORESET, and the bandwidth of the RMSI CORESET is recorded as bw_RMSI. Is also the bandwidth of the initial BWP;

In step 3, the terminal accesses the network, receives the high layer signaling configured by the base station, determines the time-frequency resource location of the high-level configuration BWP2, and the relative offset of the CORESET2 and the BWP2 configured in the BWP2, and the offset between the BWP2 and the initial BWP is recorded as Offset, this offset can be positive or negative, in this case,

The terminal receiving high layer signaling further includes an offset offset_coreset2_prb0 of the BWP2 relative to the entire carrier absolute frequency domain index start position PRB0, and the terminal further learns the offset of the RMSI CORESET relative to the PRB0 offset_RMSIcoreset_prb0 through higher layer signaling.

In step 4,

The terminal determines the overlap position and overlap bandwidth of CORESET2 and RMSI CORESET according to offset_coreset2_prb0, offset_coreset2_prb0, bw_RMSI and bw_coreset2.

In step 5, when receiving the control channel configured by the high-level signaling, the terminal first determines whether the control channel configured by the high-level signaling and the control channel of the RMSI overlap in the frequency domain, and if there is overlap, according to the RMSI in the overlapping region. The CORSET performs channel estimation for the pilot.

Example 6

In the above embodiments 1 to 4, always an RMSI CORESET and a high-level configuration CORESET overlap. In this embodiment, the two high-level configurations of the CORESET overlap, and we assume that the bandwidth of the CORESET is different from the bandwidth of the BWP.

The base station first defines the configuration of the two BWPs, and configures the CORESETs of the two BWPs through the high layer signaling. FIG. 14 is a schematic diagram of the control channel pilots provided in the embodiment of the present application. In FIG. 14, there are two BWPs, and the two BWPs are respectively recorded as BWP1 and BWP2. In this embodiment, both BWPs are relatively offset from PRB0.

In this embodiment, since the two BWPs and the corresponding CORESET are both configured at a high level, the sequence of the same ID can be initialized by the higher layer signaling.

In this case, the two terminals always know the offset of the CORESET relative to the PRB0. Therefore, as long as the same initialization ID is configured for the two terminals, it can be ensured that the pilot sequences corresponding to the two BWPs start with the same sequence starting from PRB0. Therefore, overlapping regions do not create ambiguity.

In this way, the CORESET configured with the high-level signaling does not conflict with the RMSI CORESET resource. At this time, the base station generates a pilot sequence according to the carrier bandwidth and maps, and the pilot itself does not conflict regardless of whether the CORESET of the two terminals conflicts.

Terminal side,

In step 1, the terminal 1 receives the BWP corresponding to the terminal and the CORESET corresponding to the BWP, and records it as BWP1 and CORESET1. The terminal 2 receives the BWP corresponding to the terminal and the CORESET corresponding to the BWP, and records it as BWP2. And CORESET2;

The configuration IDs that the terminal 1 and the terminal 2 receive for generating the CORESET DMRS are denoted as ID_dmrs, and the ID_dmrs configured by the terminal 1 and the terminal 2 are the same.

In step 2, the terminal 1 and the terminal 2 know the offsets of the BWP1 and the BWP2 for the carrier bandwidth PRB0 offset_bwp1 and offset_bwp2, the terminal further knows that the offsets of CORESET1 and CORESET2 with respect to the BWP are recorded as offset_coreset1 and offset_coreset2;

In step 3, the terminal 1 and the terminal 2 calculate the final offset of the CORESET relative to the PRB0 according to the respective BWP offset and the BWP offset to which the CORESET belongs, and calculate the DMRS sequence of the location where the CORESET is located;

Since the terminals generate sequences according to the relative PRB0 and the same initialization ID, the terminal uses the same pilot sequence in the overlapping region, which does not cause pilot collision.

Example 7

The base station first defines the configuration of the two BWPs, and configures the CORESETs of the two BWPs through the high layer signaling. FIG. 15 is a schematic diagram of the control channel pilots provided by the embodiment of the present application. In FIG. 15, there are two BWPs, and the two BWPs are respectively recorded as BWP1 and BWP2. In this embodiment, both BWPs are relatively offset from PRB0.

In this embodiment, since the two BWPs and the corresponding CORESET are both configured at a high level, the sequence of the same ID can be initialized by the higher layer signaling. In addition, the base station configures the following attributes of CORESET:

1) an ID used to initialize the sequence;

2) a field for identifying whether it is a broadband DMRS;

The two terminals always know the offset of CORESET relative to PRB0. Therefore, as long as the same initialization ID is configured for both terminals, it can ensure that the pilot sequences corresponding to the two BWPs all generate the same sequence starting from PRB0, thus overlapping. The area does not produce ambiguity.

At the same time, in order to realize the flexibility of scheduling, a field of broadband attribute is added to CORESET. If this field is set, the sequence is initialized according to the default ID, and the pilot is mapped on the CORESET resource according to the offset of PRB0. If this field is not set, initialization is performed according to the configured ID and pilot sequence generation and sequence mapping within the CORESET range are performed.

This method provides flexibility for scheduling. The base station knows the CORESET configured by different UEs. If different CORESETs do not overlap, the base station can generate a pilot sequence according to CORESET. The initialization process is initialized according to the configured ID. If different CORESET has Overlap, the base station sets the wideband identity to generate a pilot sequence according to the default ID and map the pilot according to the relative position with PRB0.

Terminal side,

In step 1, the terminal 1 receives the high-level signaling to know the BWP corresponding to the terminal and the CORESET corresponding to the BWP, which are recorded as BWP1 and CORESET1;

The configuration ID that the terminal 1 receives to generate the CORESET DMRS is denoted as ID_dmrs.

Terminal 1 receives the broadband attribute configuration of CORESET.

In step 2, the terminal 1 knows the offset of the BWP1 for the carrier bandwidth PRB0 offset_bwp1, the terminal further knows that the offset of the CORESET1 relative to the BWP is recorded as offset_coreset1;

In step 3, the terminal 1 reads the CORESET broadband attribute field. If the broadband attribute field is set, the final offset of the CORESET relative to the PRB0 is calculated according to the respective BWP offset and the BWP offset to which the CORESET belongs. The DMRS pilot sequence at the location of the CORESET;

If the terminal 1 reads the CORESET broadband attribute field, if the wideband attribute field is not set, the DMRS sequence of the specific CORESET is calculated according to the CORESET bandwidth and the configured sequence initial ID.

Example 8

In step 1, the base station generates twice the length of the pilot sequence required for the entire carrier bandwidth, with the lowest frequency domain RB index of the synchronization signal as the starting position, and the position pilot sequence value of the high frequency relative to the starting position is incremented. The position pilot sequence value is decremented relative to the low frequency position of the starting position.

The length of the pilot sequence required for the entire bandwidth is N, but the frequency domain minimum RB index that generates the pilot sequence according to twice the length and synchronizes with the following row corresponds to the midpoint of the pilot sequence, that is, the guide of the lowest RB index corresponding to the downlink synchronization. The frequency sequence is sN, sN+1, sN+2. Here, it is assumed that one REG has three REs carrying pilots, and the pilot sequence of the adjacent REGs whose frequency domain position is lower than the downlink synchronization is sN-3, sN-2. , sN-1.

The REG in which the reference point is located may also perform a small range of offset. For example, the pilot sequence of the lowest RB index corresponding to the downlink synchronization is sN-1, sN, sN+1,

The base station generates a pilot sequence [s0, s1, ..., sN-1, sN, sN+1, ..., s2N-1] twice the entire carrier bandwidth according to the maximum bandwidth of the carrier frequency, where N= BWmax*RSD, BWmax is the maximum bandwidth corresponding to the carrier.

In step 2, the base station notifies the time-frequency resource location of the CORESET1 through the broadcast channel, and the base station determines the pilot sequence on the CORESET1 according to the offset value of the frequency domain start position of the CORESET1 and the carrier frequency domain reference position [si,... , sj], where i and j are part of the entire carrier bandwidth pilot sequence described above. i=N+(offset1)*RSD,j=N+(offset1+BWcoreset1)*RSD-1, where BWcoreset1 is the bandwidth of CORESET1, and RSD is the pilot density of the control channel. Here, 3RS is taken per REG, and REG occupies in the frequency domain. 12 REs, one OFDM symbol in the time domain.

In step 3, the base station configures the time-frequency resource location of the CORESET2 for the terminal through high-level signaling, and the base station determines the pilot sequence of the CORESET2 by determining the offset offset2 from the reference frequency domain position according to the lowest frequency domain index of the CORESET. [sm,...,sn], where m and n are part of the entire carrier bandwidth pilot sequence described above. m=N+offset2*RSD, j=N+offset2*RSD+BWcoreset1*RSD-1, where BWcoreset1 is the bandwidth of CORESET1, RSD is the pilot density of the control channel, here 3RS per REG, REG occupies in the frequency domain 12 REs, one OFDM symbol in the time domain.

Terminal side,

The terminal generates a pilot sequence [s0, . . . , sN-1, sN, ... s2N-1] according to the cell ID acquired in the downlink synchronization process to generate a corresponding sequence length corresponding to the maximum bandwidth of the carrier.

In step 3, the terminal determines the pilot sequence [si,...,sj] on CORESET1 according to the offset value of the frequency domain start position of CORESET1 and the carrier frequency domain reference position, where i and j are the entire carrier described above. Part of the bandwidth pilot sequence. i=N+offset1*RSD, j=N+offset1*RSD+BWcoreset1*RSD-1, where BWcoreset1 is the bandwidth of CORESET1, RSD is the pilot density of the control channel, here 3RS per REG, REG occupies in the frequency domain 12 REs, one OFDM symbol in the time domain.

The pilot position corresponding to the reference point may also have a small value offset. If the pilot corresponding to the reference point is sN+1, the index value of the pilot is i=N+offset1*RSD+1, j=N+ Offset1*RSD+BWcoreset1*RSD, other offsets do similar operations.

In step 5, the terminal determines the pilot sequence [sm,...,sn] on the CORESET2 according to the offset value of the frequency domain start position of the CORESET2 and the carrier frequency domain reference position, where m and n are the entire carrier. The index of the bandwidth pilot sequence. m=N+offset2*RSD, n=N+offset2*RSD+BWcoreset2*RSD-1, where BWcoreset2 is the bandwidth of CORESET2 configured by higher layer signaling, and RSD is the pilot density of the control channel, here 3RS per REG, The REG occupies 12 REs in the frequency domain and one OFDM symbol in the time domain.

Example 9

A method for generating a PDCCH DMRS pilot sequence with multiple numerologies in the same carrier bandwidth is discussed. A carrier bandwidth is divided into multiple BWPs. Different BWPs may be configured with different numerologies. If the BWPs of different numerologies do not overlap in the frequency domain, the interference between the numerologies will be relatively small and can work simultaneously; The two BWPs of the stack use the same numerology, there is no interference between the numerology, and they can work at the same time. The following is discussed separately.

In step 1, the base station defines two BWPs in one carrier bandwidth, and the bandwidths corresponding to the two BWPs are different, but there is overlapping bandwidth. 16 is a schematic diagram of a control channel pilot according to an embodiment of the present disclosure. As shown in FIG. 16, the resources corresponding to two BWPs are respectively left and right, and the frequency domain resources corresponding to the left dotted frame are recorded as BWP1, and the right dotted line is shown. The frequency domain resource corresponding to the box is recorded as BWP2.

The base station configures BWP1 for UE1, the offset of BWP1 and PRB0 is recorded as offset1, the base station configures BWP2 for UE2, and the offset of BWP2 and PRB0 is offset2. The base station simultaneously notifies each BWP to calculate the starting position of the pilot.

As shown in FIG. 16, if the base station configures only the offset of the BWP with respect to the PRB0 according to the two terminals and the pilot sequence of the reference numerology corresponding to the offset causes the pilots placed on the two overlapping pilot carriers. Inconsistent, the starting pilot sequence index of the right block diagram in FIG. 16 is 9 and the pilot sequence index of the carrier position corresponding to the left block diagram is 8, which causes a collision.

Therefore, in addition to notifying the BWP of the offset of the PRB0 and notifying the BWP to generate the pilot, the offset from the BWP is the granularity of the numerology corresponding to the BWP.

For BWP2, the starting position corresponding to the BWP offset offset2 notified by the base station is the position of the reference numerology numbered 9, and the sequence index offset offset_seq2=-1 is notified.

For BWP1, the starting position corresponding to the BWP offset offset1 notified by the base station is the position of the reference numerology number 7, and the sequence index offset offset_seq1=0 is notified.

In step 2, the base station generates a pilot sequence [s0, . . . , sN-1] of the carrier bandwidth according to the reference numerology;

In step 3, the base station determines the pilot sequence of the actual mapping according to the offset of the respective BWP with respect to PRB0 and the sequence index offset of each BWP generating pilot sequence.

For example, for the BWP1 of UE1, the calculation method of the pilot index starting value is seq_start=offset1+offset_seq1=7+0;

The termination position is related to the bandwidth of the BWP. Assuming the bandwidth of BWP1 is BW_BWP1, the pilot index termination value is:

Seq_end=seq_start+BW_BWP1*RSD-1, where BW_BWP1 is the bandwidth for configuring BWP for UE1, the frequency domain granularity is the number of RBs, and the RSD is the pilot density.

The method for calculating the pilot sequence index of the BWP configured by the base station to another terminal is the same as that of the UE1, and details are not described herein again.

Here, the BWP allocation situation and the corresponding pilot span are only illustrative, and the bandwidth of other BWPs and the configuration of the numerology are also used by this method;

In addition, the number of the pilot index is numbered from 1 in this embodiment, and other number forms are also within the scope of the present embodiment. The offset of the notification may be based on the subcarrier width corresponding to the reference numerology or the numerology corresponding to the BWP. These differences may be implemented by the method of equal conversion by the method, and are also within the scope of protection of the present application. Inside.

In this embodiment, the case where the two numerologies are the same but the bandwidth configuration is different is described. Another way is that the two overlapping numerologies are different. In this case, the base station notifies the two offsets of each terminal in the above manner. The terminal may confirm the two pilot offsets as the pilot sequence start index of the terminal configuration BWP and determine the final pilot sequence according to the CORESET bandwidth.

Terminal side,

In step 1, the terminal receives the high layer signaling of the base station to determine the offset offset of the configured BWP and PRB0. The terminal receives the relative offset index offset_seq of the BWP generated pilot sequence.

In step 2, the terminal generates a pilot sequence [s0, . . . , sN-1] of the entire bandwidth according to the carrier bandwidth and the reference numerology.

In step 3, the terminal confirms the start termination position of the DMRS pilot sequence of the BWP according to the carrier index and the pilot offset index of the BWP with respect to the PRB0.

In addition, when the terminal acquires the CORESET configured by the base station, the terminal can also obtain the CORESET in the frequency domain position of the BWP, and the index of the terminal in the frequency domain resource of the BWP can further extract the pilot sequence in which the CORESET position occurs, for example, the terminal calculates the BWP. The pilot sequence is recorded as [s'0, s'1, ..., s'N-1], and the offset of the start position of CORESET relative to BWP is recorded as offset_coreset, and the terminal can further calculate according to the offset. The DMRS sequence index corresponding to CORESET is output, that is, the pilot start sequence seq_coreset_start=offset_coreset*RSD of CORESET.

Example 10

FIG. 17 is a schematic diagram of a control channel pilot according to an embodiment of the present disclosure. As shown in FIG. 17, the base station is configured according to the manner of Embodiment 9, but the offset index of a certain BWP pilot sequence is not configured, and the base station follows the numerology and The range of sequences intercepted is determined by reference to the multiple relationship of numerology.

The terminal side determines the intercepted sequence according to the multiple relationship between the numerology and the reference numerology.

The embodiments disclosed in the present application are as described above, but the contents thereof are only for the purpose of facilitating understanding of the technical solutions of the present application, and are not intended to limit the present application. Any modification or variation in the form and details of the implementation may be made by those skilled in the art without departing from the scope of the present invention. It is subject to the scope defined by the appended claims.

Claims

A control channel pilot generation method is applied to a base station, including:

And transmitting, by the preset frequency domain location of the carrier, a broadcast channel and a synchronization signal, where the broadcast channel includes a control resource set initially accessed by the terminal; and broadcasting, by using the broadcast channel, the control resource set of the initial access Frequency domain offset position information of a broadcast channel or a synchronization signal;

After the one or more terminals access, the high-level configuration signaling is sent to the access terminal, where the high-level configuration signaling includes: another control resource set other than the initial access control resource set of the access terminal, and And notifying the frequency domain offset location information of the control resource relative to the carrier start location in the other control resource set of the access terminal by using the high layer configuration signaling.
The method of claim 1 wherein

The initial access control resource set and the other control resource set pilot sequence are generated by using the same or different initialization identifier IDs;

When the initial control resource set does not overlap with the frequency domain resources of the other control resource set, the initial control resource set is the same as or different from the pilot initialization ID of the other control resource set;

When the initial control resource set overlaps with other frequency resource resources of the control resource set, and the initial control resource set works simultaneously with other control resource sets, the pilot of the initial control resource set and other control resource sets The initialization ID is the same.
The method according to claim 2, wherein when the initial control resource set and the other control resource set adopt the same pilot initialization ID, the frequency domain relative offset of the initial control resource set and other control resource sets is Generate and map pilot sequences with common reference frequencies.
The method according to claim 2, wherein when the initial control resource set overlaps with frequency domain resources of other control resource sets, and the initial control resource set works simultaneously with other control resource sets, the intersection The frequency domain resource uses the pilot sequence of the initially accessed control resource set.
The method according to claim 4, wherein the pilot sequence generation manner of the other control resource sets is configured by the higher layer parameters for different terminals or different control resource sets of the same terminal.
The method according to claim 5, wherein said common reference frequency point comprises one of: a starting frequency domain position of a broadcast channel or a synchronization signal, a central frequency domain position of a broadcast channel or a synchronization signal, a broadcast channel or a synchronization signal Termination of the frequency domain location, the frequency domain location of the carrier absolute index.
The method of claim 3, wherein generating and mapping a pilot sequence according to a frequency domain relative offset and a common reference frequency point of the initial control resource set and other control resource sets comprises:

When mapping with a common reference frequency point, the pilot sequence index and the index of the pilot carrier are placed in a cyclic modulo manner.
The method of claim 5, wherein when the length of the generated pilot sequence is greater than the carrier bandwidth, the common reference frequency point corresponds to a fixed sequence of pilot sequences in the pilot sequence.
The method of claim 5, wherein the pilot sequences of the other control resource sets are generated by the high-level configuration parameters for different terminals or different control channels of the same terminal, including:

A pilot sequence of other control resource sets is generated according to the configured pilot sequence generation ID, the default pilot sequence generation ID, or the broadband identification field.
The method according to claim 5, wherein for different terminals or different control channels of the same terminal, when different terminal or different control resource sets of different control channels overlap, and different terminals or other control resource sets of different control channels are simultaneously When working, the Enable field is set and the pilot sequence is generated according to the default or configured ID.
The method of claim 8, wherein the fixed reference position of the common reference frequency point is a sequence corresponding to an intermediate position of the pilot sequence.
A control channel pilot generation method is applied to a base station, including:

And transmitting, by the preset frequency domain location of the carrier, a broadcast channel and a synchronization signal, where the broadcast channel includes a control resource set initially accessed by the terminal; and broadcasting, by using the broadcast channel, the control resource set of the initial access Frequency domain offset position information of a broadcast channel or a synchronization signal;

After the one or more terminals access, the high-level configuration signaling is sent to the access terminal, where the high-level configuration signaling includes: the offset of the pilot sequence by the bandwidth portion BWP of the multiple sub-carrier spacing configuration from the entire carrier. .
The method of claim 12, wherein the high layer configuration signaling further comprises: carrier spacing information.
A control channel pilot generation method is applied to a terminal, including:

Determining a pilot sequence according to the initial access control resource set configured by the received broadcast channel or the synchronization signal and the frequency domain offset position information of the broadcast channel or the synchronization signal;

And determining a pilot sequence of the control resource according to the frequency domain offset location information of the control resource relative to the carrier start location in the other control resource set configured by the received high layer configuration signaling.
The method of claim 14 wherein

Receiving, by the high-level configuration signaling, the interception of the pilot sequence of the control channel resource set received by the terminal;

And determining a pilot sequence on the control resource set according to the received control channel resource set relative to the carrier start offset and the pilot sequence intercept offset.
The method according to claim 14, wherein when the initial control resource set and the other control resource set adopt the same pilot initialization ID, the frequency domain relative offset of the initial control resource set and other control resource sets is Generate and map pilot sequences with common reference frequencies.
The method of claim 14, wherein the overlap is when the initial control resource set overlaps with frequency domain resources of other control resource sets and the initial control resource set works simultaneously with other control resource sets The frequency domain resource adopts a pilot sequence of the initially accessed control resource set.
The method according to claim 16, wherein said common reference frequency point comprises one of: a starting frequency domain position of a broadcast channel or a synchronization signal, a central frequency domain position of a broadcast channel or a synchronization signal, a broadcast channel or a synchronization signal Termination of the frequency domain location, the frequency domain location of the carrier absolute index.
The method of claim 14, wherein the index of the pilot sequence index and the pilot carrier is selected in a cyclic modulo manner when mapping at a common reference frequency point.
The method of claim 14 wherein the pilot sequences are generated in a manner greater than the length of the carrier bandwidth, the common reference frequency points corresponding to a fixed sequence of pilot sequences in the pilot sequence.
A control channel pilot generating device is provided at a base station, including:

The first broadcast module is configured to send a broadcast channel and a synchronization signal to the terminal at a preset frequency domain location of the carrier, where the broadcast channel includes a control resource set initially accessed by the terminal, and the initial access control resource set and Frequency domain offset position information of a broadcast channel or a synchronization signal;

a first configuration module, configured to send high-level configuration signaling to the access terminal after the one or more terminals access, where the high-level configuration signaling includes the control resource set of the initial access of the access terminal The other control resource set, and the frequency domain offset location information of the control resource relative to the carrier start location in the other control resource set of the access terminal is notified by using the high layer configuration signaling.
A control channel pilot generating device is provided at a base station, including:

a second broadcast module, configured to send a broadcast channel and a synchronization signal to the terminal at a preset frequency domain location of the carrier, where the broadcast channel includes a control resource set initially accessed by the terminal, and a control resource set and broadcast of the initial access Frequency domain offset position information of a channel or a synchronization signal;

a second configuration module, configured to send high-level configuration signaling to the access terminal after the one or more terminals access, where the bandwidth part BWP including multiple sub-carrier spacing configurations in the high-level configuration signaling is intercepted from the entire carrier The offset of the frequency sequence.
A control channel pilot generating device is disposed on the terminal, and includes:

The access module is configured to determine a pilot sequence according to the initial access control resource set configured by the received broadcast channel or the synchronization signal, and the frequency domain offset position information of the broadcast channel or the synchronization signal;

And the resource module is configured to determine a pilot sequence of the control resource according to the frequency domain offset location information of the control resource relative to the carrier start location in the other control resource set configured by the received high layer configuration signaling.
A control channel pilot generating device includes: a memory and a processor; wherein

The memory is configured to save a program for performing control channel pilot generation;

The processor, configured to perform control channel pilot generation, performs the following operations when being read and executed:

Transmitting a broadcast channel and a synchronization signal to the terminal at a preset frequency domain location of the carrier, where the broadcast channel includes a control resource set initially accessed by the terminal, and a frequency of the initial access control resource set and a broadcast channel or a synchronization signal Domain offset location information;

After the one or more terminals access, the high-level configuration signaling is sent to the access terminal, where the high-level configuration signaling includes another control resource set other than the initial access control resource set of the access terminal, and passes the And the high-level configuration signaling notifies the frequency domain offset location information of the control resource relative to the carrier start location in the other control resource set of the access terminal.
A storage medium storing a program for performing control channel pilot generation;

The program generated by the control channel pilot performs the following operations when being read and executed:

Transmitting a broadcast channel and a synchronization signal to the terminal at a preset frequency domain location of the carrier, where the broadcast channel includes a control resource set initially accessed by the terminal, and a frequency of the initial access control resource set and a broadcast channel or a synchronization signal Domain offset location information;

After the one or more terminals access, the high-level configuration signaling is sent to the access terminal, where the high-level configuration signaling includes another control resource set other than the initial access control resource set of the access terminal, and passes the The high-level configuration signaling notifies the frequency domain offset location information of the control resource relative to the carrier start location in the other control resource set of the access terminal.