A control channel pilot generation method, device and equipment

Abstract

The present application proposes a control channel pilot generation method, device and equipment, which relates to the field of radio resource configuration technology, including: sending a broadcast channel and a synchronization signal to a terminal at a preset frequency domain position of a carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal; and broadcasting the frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal through the broadcast channel; after one or more terminals access, sending a high-level configuration signaling to the access terminal, wherein the high-level configuration signaling includes other control resource sets other than the control resource set initially accessed by the access terminal, and notifying the access terminal of the frequency domain offset position information of the control resources in the other control resource sets relative to the starting position of the carrier through the high-level configuration signaling.

Description

Technical Field

[0001] The present invention relates to the technical field of radio resource configuration, and in particular to a control channel pilot generation method, device and equipment. Background Art

[0002] With the continuous advancement of radio technology, various radio services have emerged in large numbers. However, the spectrum resources that radio services rely on are limited. Faced with the increasing demand for bandwidth, the spectrum resources between 300MHz and 3GHz mainly used in traditional commercial communications are extremely tight and can no longer meet the needs of future wireless communications.

[0003] In the future wireless NR (new radio) communication, the system has flexible adaptability of spectrum, flexible networking and forward compatibility, and supports more abundant applications, such as some applications require high throughput transmission, some applications require high reliability, some applications require low latency, some applications require more energy saving, some applications have limited terminal capabilities, and some applications are a combination of the above items. Therefore, the design of the control channel must also be more sophisticated to support complex applications.

[0004] The transmission of control channels requires flexible time-frequency resource configuration to achieve applications such as high reliability, low latency, and low power consumption. Based on the beam conditions of the terminal and the base station, diversity or beamforming methods are required. Different transmission methods have different requirements for pilot patterns. The diversity method can adopt self-contained or broadband pilots, and the beamforming method can adopt a self-contained pilot structure.

[0005] The flexible pilot structure resulting from the flexible resource configuration and transmission mode of the control channel requires that the time-frequency resource position of the control channel is very flexible. Multiple control channels may be configured for the same terminal or different terminals. The time-frequency resources of these control channels may overlap. The transmission modes of these control channels may be different, and thus their pilot structures may also be different.

[0006] For different terminals or the same terminal, multiple overlapping time-frequency domains may be configured. In this case, the following will appear: Figure 1 The situation shown is that the time-frequency resource positions of two CORESETs (COntrol REsource SETs) overlap. If the two CORESETs use different transmission schemes and pilot structures, this will cause a conflict in the definition of the pilot sequence at the same pilot resource position. Summary of the invention

[0007] The present invention provides a control channel pilot generation method, device and equipment to solve the problem that the overlapping of control channel time-frequency resources leads to the generation of inconsistent pilot sequences corresponding to control channels.

[0008] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is as follows:

[0009] In a first aspect, the present invention provides a control channel pilot generation method, applied to a base station, comprising:

[0010] Sending a broadcast channel and a synchronization signal to a terminal at a preset frequency domain position of a carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal; and broadcasting frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal through the broadcast channel;

[0011] After one or more terminals access, a high-level configuration signaling is sent to the access terminal, wherein the high-level configuration signaling includes other control resource sets other than the control resource set for initial access of the access terminal, and the high-level configuration signaling is used to notify the access terminal of the frequency domain offset position information of the control resources in the other control resource sets relative to the starting position of the carrier.

[0012] In a second aspect, the present invention provides a control channel pilot generation method, applied to a base station, comprising:

[0013] Sending a broadcast channel and a synchronization signal to a terminal at a preset frequency domain position of a carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal; and broadcasting frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal through the broadcast channel;

[0014] After one or more terminals access, a high-level configuration signaling is sent to the access terminal, wherein the high-level configuration signaling includes an offset of a pilot sequence intercepted from the entire carrier by a bandwidth part BWP configured with multiple subcarrier spacing.

[0015] In a third aspect, the present invention provides a control channel pilot generation method, applied to a terminal, comprising:

[0016] Determine a pilot sequence according to the initial access control resource set configured by the received broadcast channel or synchronization signal and the frequency domain offset position information of the broadcast channel or synchronization signal;

[0017] The pilot sequence of the control resource is determined according to the frequency domain offset position information of the control resource in the other control resource set configured by the received high-level configuration signaling relative to the starting position of the carrier.

[0018] In a fourth aspect, the present invention provides a control channel pilot generating device, which is arranged in a base station, comprising:

[0019] A first broadcast module, configured to send a broadcast channel and a synchronization signal to a terminal at a preset frequency domain position of a carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal and frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal;

[0020] The first configuration module is configured to send high-level configuration signaling to the access terminal after one or more terminals access, wherein the high-level configuration signaling includes other control resource sets other than the control resource set for initial access of the access terminal, and notify the access terminal of the frequency domain offset position information of the control resources in the other control resource sets relative to the carrier start position through the high-level configuration signaling.

[0021] In a fifth aspect, the present invention provides a control channel pilot generating device, which is arranged in a base station, comprising:

[0022] A second broadcast module is configured to send a broadcast channel and a synchronization signal to the terminal at a preset frequency domain position of the carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal and frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal;

[0023] The second configuration module is configured to send a high-level configuration signaling to the access terminal after one or more terminals access, wherein the high-level configuration signaling includes an offset of a pilot sequence intercepted from the entire carrier by a bandwidth part BWP configured with multiple subcarrier intervals.

[0024] In a sixth aspect, the present invention provides a control channel pilot generating device, which is arranged in a terminal, comprising:

[0025] An access module, configured to determine a pilot sequence according to an initial access control resource set configured by a received broadcast channel or synchronization signal and frequency domain offset position information of the broadcast channel or synchronization signal;

[0026] The resource module is configured to determine the pilot sequence of the control resource according to the frequency domain offset position information of the control resource in other control resource sets configured by the received high-level configuration signaling relative to the carrier start position.

[0027] In a seventh aspect, the present invention provides a control channel pilot generation device, comprising: a memory and a processor;

[0028] The memory is used to store a program for generating a control channel pilot;

[0029] When the program for generating a control channel pilot is read and executed, the processor performs the following operations:

[0030] Sending a broadcast channel and a synchronization signal to the terminal at a preset frequency domain position of the carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal and frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal;

[0031] After one or more terminals access, a high-level configuration signaling is sent to the access terminal, wherein the high-level configuration signaling includes other control resource sets other than the control resource set for initial access of the access terminal, and the high-level configuration signaling is used to notify the access terminal of the frequency domain offset position information of the control resources in the other control resource sets relative to the carrier start position.

[0032] In an eighth aspect, the present invention provides a storage medium storing a program for generating a control channel pilot;

[0033] When the control channel pilot generation program is read and executed, the following operations are performed:

[0034] Sending a broadcast channel and a synchronization signal to the terminal at a preset frequency domain position of the carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal and frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal;

[0035] After one or more terminals access, a high-level configuration signaling is sent to the access terminal, wherein the high-level configuration signaling includes other control resource sets other than the control resource set for initial access of the access terminal, and the high-level configuration signaling is used to notify the access terminal of the frequency domain offset position information of the control resources in the other control resource sets relative to the carrier start position.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The technical solution of the present invention can solve the pilot sequence generation mechanism in which the control channel corresponding pilot is inconsistent due to the overlapping of the time-frequency resources of the control channel. In the new pilot generation mechanism, it can be achieved that the pilot sequence will not be ambiguous in the overlapping area. Among them, if the overlapping area is configured for one UE and the two control areas are defined based on different BWPs (bandwidth parts) or based on the control area itself, the overlapping area will cause ambiguity in the understanding of DMRS (DeModulation Reference Signal). At this time, it is necessary to agree on the UE behavior of the overlapping area, that is, how the UE determines the final pilot of the overlapping area. If the overlapping area is configured for two UEs, the two UEs do not understand the pilot sequence defined by the other UE based on a certain BWP or based on CORESET, resulting in a pilot sequence conflict, which affects the transmission of control messages. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic diagram of overlapping time-frequency resource positions in the background technology;

[0039] Figure 2 A flow chart of a control channel pilot generation method according to an embodiment of the present invention;

[0040] Figure 3 A flow chart of a control channel pilot generation method according to an embodiment of the present invention;

[0041] Figure 4 A schematic diagram of the structure of a control channel pilot generating device according to an embodiment of the present invention;

[0042] Figure 5 A schematic diagram of the structure of a control channel pilot generating device according to an embodiment of the present invention;

[0043] Figure 6 is a transmission flow chart of the base station in Example 1;

[0044] Figure 7 is a receiving flow chart of the terminal of Example 1;

[0045] Figure 8 is a schematic diagram of a control channel pilot in Example 2;

[0046] Fig. 9 This is a schematic diagram of the control channel pilot of Example 3;

[0047] Fig.10 This is a schematic diagram of the control channel pilot of Example 3;

[0048] Fig.11 This is a schematic diagram of the control channel pilot of Example 4;

[0049] Fig.12 is a schematic diagram of a control channel pilot in Example 5;

[0050] Fig.13 is a schematic diagram of a control channel pilot in Example 5;

[0051] Fig.14 This is a schematic diagram of the control channel pilot of Example 6;

[0052] Fig.15 is a schematic diagram of a control channel pilot in Example 7;

[0053] Fig.16 is a schematic diagram of a control channel pilot in Example 9;

[0054] Fig.17 This is a schematic diagram of the control channel pilot of Example 10. DETAILED DESCRIPTION

[0055] In order to make the invention objectives, technical solutions and beneficial effects of the present invention more clear, the embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be noted that, unless there is a conflict, the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily.

[0056] like Figure 2 As shown, an embodiment of the present invention provides a control channel pilot generation method, which is applied to a base station, including:

[0057] S101, sending a broadcast channel and a synchronization signal to a terminal at a preset frequency domain position of a carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal; and broadcasting frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal through the broadcast channel;

[0058] S102. After one or more terminals access, send high-level configuration signaling to the access terminal, where the high-level configuration signaling includes other control resource sets other than the control resource set for initial access of the access terminal, and notify the access terminal of frequency domain offset position information of control resources in other control resource sets relative to the starting position of the carrier through the high-level configuration signaling.

[0059] In order to adapt to the flexibility of the spectrum, NR controls the numerology of the channel (a set of parameters used in the communication system, including subcarrier spacing, symbol length, CP (Cyclic Prefix) length, etc.) which can be flexibly configured with different frequency bands. For example, a smaller subcarrier spacing is used in the low frequency band to adapt to the large delay spread, and a larger subcarrier spacing is used in the high frequency band to resist phase noise.

[0060] In order to adapt to the flexibility and forward compatibility of NR networking, the control channel resource location is configurable, and certain resources can be flexibly configured through the control channel. This configuration can be completed through high-level and / or control signaling.

[0061] To support high-throughput applications, NR control channels can be configured with wider activation bandwidth for high-throughput data transmission.

[0062] In order to support high-reliability applications, NR's control channel must first be very reliable, including multi-beam transmission mechanism, higher aggregation level, time domain repetition, wide bandwidth spread spectrum and other technologies.

[0063] In order to support low-latency applications, NR requires that the transmission of control channels must adapt to the minimum latency requirements of service data, so the control channel cannot appear only on a number of OFDM symbols starting from a fixed subframe start position like LTE. One way is to embed low-latency services during ordinary service transmission, which is called preemption. This method requires that the control channel cannot appear only at the start position of a subframe or time slot. At this time, the time-frequency resource position and period of the control channel must be more flexible than LTE.

[0064] In order to support energy-saving applications, NR requires that when controlling and scheduling business data, data scheduling should be performed in an energy-saving manner as much as possible. One way is the cross-slot method. In this way, the terminal immediately shuts down the RF link after receiving the symbol of the control channel to save power. Another way is to configure the bandwidth monitored by the terminal in the active state and the inactive state to be able to switch flexibly. For example, in the idle state, the terminal works at a smaller bandwidth. In this state, the terminal only monitors the control channel with a small bandwidth to achieve the purpose of energy saving. When working in the active mode, it works at a larger bandwidth to complete data transmission as quickly as possible.

[0065] In order to support reliable transmission, NR requires that the control channel can provide reliability through multi-dimensional diversity. For example, multiple preferred beams are used in space to transmit control messages to terminals, coverage is improved through repetition in time, and coverage is enhanced through large-bandwidth spread spectrum in the frequency domain.

[0066] From the above analysis, we can see that the requirements of future wireless communications for control channels are mainly that the control channels have flexibility, which includes:

[0067] i) Flexibility of resource location. Compared with the relatively fixed control channel of LTE (Long Term Evolution), the control channel of NR requires more flexible time-frequency resource configuration. In order to achieve flexible configuration, application-specific control channels can be configured for different users, such as high bandwidth and low monitoring time for high-reliability services.

[0068] ii) Flexibility of transmission mode. Before the terminal and the base station perform beam training, the terminal can use diversity to transmit the control channel. 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 delayed diversity and beam polling transmission modes. Beamforming can transmit the control channel based on the preferred beam and preferred frequency band. Therefore, using centralized resources is more conducive to improving performance. For the diversity transmission mode, because the terminal and the base station do not know the optimal preferred beam and preferred frequency band, a reliable method is to transmit in the frequency domain diversity mode.

[0069] In the embodiment of the present invention, the pilot sequences of the control resource set for initial access and other control resource sets are generated using the same or different initialization identification IDs;

[0070] When the frequency domain resources of the initial control resource set and other control resource sets do not overlap, the pilot initialization IDs of the initial control resource set and other control resource sets are the same or different;

[0071] When the frequency domain resources of the initial control resource set and other control resource sets overlap and the initial control resource set and other control resource sets work simultaneously, the pilot initialization IDs of the initial control resource set and other control resource sets are the same.

[0072] In an embodiment of the present invention, when the initial control resource set and other control resource sets use the same pilot initialization ID, a pilot sequence is generated and mapped according to the frequency domain relative offset and common reference frequency between the initial control resource set and other control resource sets.

[0073] In an embodiment of the present invention, when the initial control resource set overlaps with frequency domain resources of other control resource sets and the initial control resource set and other control resource sets work simultaneously, the overlapping frequency domain resources adopt the pilot sequence of the initially accessed control resource set.

[0074] In the embodiment of the present invention, for different terminals or different control resource sets of the same terminal, the pilot sequence generation method of other control resource sets is configured through high-level parameters.

[0075] In an embodiment of the present invention, the common reference frequency point includes one of the following: the starting frequency domain position of the broadcast channel or synchronization signal, the center frequency domain position of the broadcast channel or synchronization signal, the ending frequency domain position of the broadcast channel or synchronization signal, and the frequency domain position of the carrier absolute index.

[0076] In an embodiment of the present invention, generating and mapping a pilot sequence according to a relative frequency domain offset and a common reference frequency point between the initial control resource set and other control resource sets includes:

[0077] When mapping is performed with a common reference frequency, the pilot sequence index and the pilot carrier index are placed in a sequence in a cyclic modulo manner.

[0078] In the embodiment of the present invention, when the length of the generated pilot sequence is greater than the carrier bandwidth, the common reference frequency point corresponds to a pilot sequence at a fixed position in the pilot sequence.

[0079] In the embodiment of the present invention, for different terminals or different control channels of the same terminal, generating pilot sequences of other control resource sets through high-level configuration parameters includes:

[0080] The pilot sequences of other control resource sets are generated according to the configured pilot sequence generation ID, the default pilot sequence generation ID or the broadband identification field.

[0081] In an embodiment of the present invention, for different terminals or different control channels of the same terminal, when other control resource sets of different terminals or different control channels overlap and other control resource sets of different terminals or different control channels work simultaneously, the enable field is set and a pilot sequence is generated according to a default or configured ID.

[0082] In the embodiment of the present invention, the fixed position of the pilot sequence corresponding to the common reference frequency point is a sequence corresponding to the middle position of the pilot sequence.

[0083] The embodiment of the present invention further provides a control channel pilot generation method, which is applied to a base station, comprising:

[0084] Sending a broadcast channel and a synchronization signal to a terminal at a preset frequency domain position of a carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal; and broadcasting frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal through the broadcast channel;

[0085] After one or more terminals access, a high-level configuration signaling is sent to the access terminal, wherein the high-level configuration signaling includes an offset of a pilot sequence intercepted from the entire carrier by a bandwidth part BWP configured with multiple subcarrier spacing.

[0086] The high-level configuration signaling also includes: carrier spacing information.

[0087] like Figure 3 As shown, an embodiment of the present invention further provides a control channel pilot generation method, which is applied to a terminal, comprising:

[0088] S201, determining a pilot sequence according to the initial access control resource set configured by the received broadcast channel or synchronization signal and the frequency domain offset position information of the broadcast channel or synchronization signal;

[0089] S202: Determine a pilot sequence of the control resource according to frequency domain offset position information of the control resource in other control resource sets configured by the received high-level configuration signaling relative to the carrier start position.

[0090] In the embodiment of the present invention, the terminal receives a high-level configuration signaling to obtain an offset of a pilot sequence intercepted by a control channel resource set received by the terminal;

[0091] The pilot sequence on the control resource set is determined according to the received control channel resource set relative to the carrier start offset and the pilot sequence interception offset.

[0092] In an embodiment of the present invention, when the initial control resource set and other control resource sets use the same pilot initialization ID, a pilot sequence is generated and mapped according to the frequency domain relative offset and common reference frequency between the initial control resource set and other control resource sets.

[0093] In an embodiment of the present invention, when the initial control resource set overlaps with frequency domain resources of other control resource sets and the initial control resource set and other control resource sets work simultaneously, the overlapping frequency domain resources adopt the pilot sequence of the initially accessed control resource set.

[0094] In an embodiment of the present invention, the common reference frequency point includes one of the following: the starting frequency domain position of the broadcast channel or synchronization signal, the center frequency domain position of the broadcast channel or synchronization signal, the ending frequency domain position of the broadcast channel or synchronization signal, and the frequency domain position of the carrier absolute index.

[0095] In the embodiment of the present invention, when mapping is performed using a common reference frequency point, the pilot sequence index and the pilot carrier index are selected in a cyclic modulo manner.

[0096] In the embodiment of the present invention, the pilot sequence is generated in a manner that is greater than the length of the carrier bandwidth, and the common reference frequency point corresponds to a pilot sequence at a fixed position in the pilot sequence.

[0097] like Figure 4 As shown, an embodiment of the present invention further provides a control channel pilot generating device, which is arranged in a base station and includes:

[0098] A first broadcast module, configured to send a broadcast channel and a synchronization signal to a terminal at a preset frequency domain position of a carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal and frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal;

[0099] The first configuration module is configured to send high-level configuration signaling to the access terminal after one or more terminals access, wherein the high-level configuration signaling includes other control resource sets other than the control resource set for initial access of the access terminal, and notify the access terminal of the frequency domain offset position information of the control resources in the other control resource sets relative to the carrier start position through the high-level configuration signaling.

[0100] The control resource set for initial access and the pilot sequences of other control resource sets are generated by using the same or different initialization identification IDs;

[0101] When the frequency domain resources of the initial control resource set and other control resource sets do not overlap, the pilot initialization IDs of the initial control resource set and other control resource sets are the same or different;

[0102] When the frequency domain resources of the initial control resource set and other control resource sets overlap and the initial control resource set and other control resource sets work simultaneously, the pilot initialization IDs of the initial control resource set and other control resource sets are the same.

[0103] In an embodiment of the present invention, when the initial control resource set and other control resource sets use the same pilot initialization ID, a pilot sequence is generated and mapped according to the frequency domain relative offset and common reference frequency between the initial control resource set and other control resource sets.

[0104] In an embodiment of the present invention, when the initial control resource set overlaps with the frequency domain resources of other control resource sets and the initial control resource set and the other control resource sets work simultaneously, the overlapping frequency domain resources adopt the pilot sequence of the initially accessed control resource set.

[0105] In the embodiment of the present invention, for different terminals or different control resource sets of the same terminal, the pilot sequence generation method of other control resource sets is configured through high-level parameters.

[0106] In an embodiment of the present invention, the common reference frequency point includes one of the following: the starting frequency domain position of the broadcast channel or synchronization signal, the center frequency domain position of the broadcast channel or synchronization signal, the ending frequency domain position of the broadcast channel or synchronization signal, and the frequency domain position of the carrier absolute index.

[0107] In an embodiment of the present invention, generating and mapping a pilot sequence according to a relative frequency domain offset and a common reference frequency point between the initial control resource set and other control resource sets includes:

[0108] When mapping is performed with a common reference frequency point, the pilot sequence index and the pilot carrier index correspond to each other in a cyclic modulo manner.

[0109] In the embodiment of the present invention, when the length of the generated pilot sequence is greater than the carrier bandwidth, the common reference frequency point corresponds to a pilot sequence at a fixed position in the pilot sequence.

[0110] In the embodiment of the present invention, for different terminals or different control channels of the same terminal, generating pilot sequences of other control resource sets through high-level configuration parameters includes:

[0111] The pilot sequences of other control resource sets are generated according to the configured pilot sequence generation ID, the default pilot sequence generation ID or the broadband identification field.

[0112] In an embodiment of the present invention, for different terminals or different control channels of the same terminal, when other control resource sets of different terminals or different control channels overlap and other control resource sets of different terminals or different control channels work simultaneously, the enable field is set and a pilot sequence is generated according to a default or configured ID.

[0113] The fixed position of the pilot sequence corresponding to the common reference frequency point is a sequence corresponding to the middle position of the pilot sequence.

[0114] The embodiment of the present invention further provides a control channel pilot generation method, which is applied to a base station, comprising:

[0115] Sending a broadcast channel and a synchronization signal to the terminal at a preset frequency domain position of the carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal and frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal;

[0116] After one or more terminals access, a high-level configuration signaling is sent to the access terminal, wherein the high-level configuration signaling includes an offset of a pilot sequence intercepted from the entire carrier by a bandwidth part BWP configured with multiple subcarrier spacing.

[0117] The high-level configuration signaling also includes: carrier spacing information.

[0118] The embodiment of the present invention further provides a control channel pilot generating device, which is arranged in a base station and includes:

[0119] A second broadcast module is configured to send a broadcast channel and a synchronization signal to the terminal at a preset frequency domain position of the carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal and frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal;

[0120] The second configuration module is configured to send a high-level configuration signaling to the access terminal after one or more terminals access, wherein the high-level configuration signaling includes an offset of a pilot sequence intercepted from the entire carrier by a bandwidth part BWP configured with multiple subcarrier intervals.

[0121] The high-level configuration signaling also includes: carrier spacing information.

[0122] like Figure 5 As shown, an embodiment of the present invention further provides a control channel pilot generating device, which is arranged in a terminal and includes:

[0123] An access module, configured to determine a pilot sequence according to an initial access control resource set configured by a received broadcast channel or synchronization signal and frequency domain offset position information of the broadcast channel or synchronization signal;

[0124] The resource module is configured to determine the pilot sequence of the control resource according to the frequency domain offset position information of the control resource in other control resource sets configured by the received high-level configuration signaling relative to the carrier start position.

[0125] The embodiment of the present invention further provides a control channel pilot generation device, comprising: a memory and a processor; characterized in that:

[0126] The memory is used to store a program for generating a control channel pilot;

[0127] When the program for generating a control channel pilot is read and executed, the processor performs the following operations:

[0128] Sending a broadcast channel and a synchronization signal to the terminal at a preset frequency domain position of the carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal and frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal;

[0129] After one or more terminals access, a high-level configuration signaling is sent to the access terminal, wherein the high-level configuration signaling includes other control resource sets other than the control resource set for initial access of the access terminal, and the high-level configuration signaling is used to notify the access terminal of the frequency domain offset position information of the control resources in the other control resource sets relative to the carrier start position.

[0130] An embodiment of the present invention further provides a storage medium, characterized in that: a program for generating a control channel pilot is stored;

[0131] When the control channel pilot generation program is read and executed, the following operations are performed:

[0132] Sending a broadcast channel and a synchronization signal to the terminal at a preset frequency domain position of the carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal and frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal;

[0133] After one or more terminals access, a high-level configuration signaling is sent to the access terminal, wherein the high-level configuration signaling includes other control resource sets other than the control resource set for initial access of the access terminal, and the high-level configuration signaling is used to notify the access terminal of the frequency domain offset position information of the control resources in the other control resource sets relative to the carrier start position.

[0134] Example 1

[0135] like Figure 1As shown, the base station sends SS / PBCH at a specific frequency domain position of a carrier, and the base station notifies the RMSI CORESET (Remaining Minimum System Information Control Resource Set) for initial access through PBCH. The RMSI CORESET notified is the frequency domain position offset relative to the SS / PBCH.

[0136] The base station configures other CORESETs for the terminal through high-level signaling, and the base station also informs the frequency domain offset of other CORESETs relative to the frequency domain offset of SS / PBCH.

[0137] like Figure 6 The RMSI CORESET is CORESET 1, and the CORESET configured by high-level signaling is CORESET 2. The transmission mode of CORESET 1 is sCDD, and the pilot structure is broadband pilot. The transmission mode of CORESET 2 is precoder cycling, and the pilot structure is a self-contained structure.

[0138] The base station determines the pilot sequence according to the frequency domain position offset between CORESET 1 and SS / PBCH. For example, the offset between the RB corresponding to the lowest frequency domain index of CORESET 1 and the RB corresponding to the lowest frequency domain index of SS is recorded as offSet1. The base station generates the pilot sequence according to the cell ID and records it as [s0, s1, ..., sN-1], where N is the pilot sequence length corresponding to the maximum bandwidth supported by the corresponding carrier frequency, the pilot density is recorded as RSD, and the maximum bandwidth is recorded as BWmax, then N = BWmax*RSD. The base station determines the pilot sequence of CORESET1 as [si, ..., sj] according to offset1 and the pilot density RSD. The bandwidth corresponding to CORESET1 is recorded as BWcoreset

[0139] Where i=offset1*RSD, j=offset1*RSD+BWcoreset*RSD-1.

[0140] The base station generates a sequence on CORESET1 in the above manner and maps it to the corresponding pilot carrier.

[0141] For CORESET2, the base station calculates the offset and the offset of the pilot index in the same way. 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 have the same value.

[0142] The receiving process of the terminal is as follows Figure 7 :

[0143] In step 1, the terminal performs downlink synchronization and broadcast reading.

[0144] In step 2, the terminal confirms the time-frequency resource location of CORESET1 based on the broadcast information.

[0145] In step 3, when downlink synchronization is completed, the terminal obtains the frequency domain resource position 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 downlink synchronization to calculate the relative offset of CORESET1. The terminal determines the pilot sequence of CORESET1 according to the relative offset offset and the pilot density RSD.

[0146] In step 4, the terminal receives the high-level signaling sent by the base station and obtains the time-frequency resource configuration of CORESET2;

[0147] In step 5, the terminal determines the pilot sequence corresponding to CORESET2 according to the frequency domain RB offset between CORESET2 and the synchronization signal.

[0148] Example 2

[0149] The same reference point is used within the carrier to generate the pilot sequence

[0150] In this embodiment, the base station uses a common pilot offset for all CORESETs to ensure that there is no ambiguity in the pilot sequence in the overlapping area.

[0151] In step 1, the base station provides an initial reference point for the generation of control channel pilots for the carrier through downlink synchronization, such as Figure 8 As shown, here the terminal uses the RB corresponding to the lowest frequency domain index of downlink synchronization as the reference position for generating the pilot sequence.

[0152] The reference point can also select the RB index where the center frequency domain of the synchronization channel is located, or the RB index where the highest frequency domain of the synchronization signal is located, or the RB index corresponding to the lowest frequency domain index of the frequency domain where the broadcast channel is located, or the RB index where the center frequency of the broadcast channel is located, or the RB index corresponding to the highest frequency domain index of the broadcast channel.

[0153] 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 frequency.

[0154] In step 2, the base station notifies the time-frequency resource location of CORESET1 through the broadcast channel. The base station determines the pilot sequence [si,...,sj] on CORESET1 based on the offset value offset1 between the frequency domain starting position of CORESET1 and the carrier frequency domain reference position, where i and j are part of the above-mentioned entire carrier bandwidth pilot sequence. i = offset1*RSD, j = 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 12 REs in the frequency domain, and is one OFDM symbol in the time domain.

[0155] In step 3, the base station configures the time-frequency resource position of CORESET2 for the terminal through high-level signaling. The base station determines the offset offset2 from the reference frequency domain position according to the lowest frequency domain index of CORESET and calculates the pilot sequence of CORESET2. [sm,...,sn], where m and n are part of the above-mentioned entire carrier bandwidth pilot sequence. 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 is taken, and REG occupies 12 REs in the frequency domain and one OFDM symbol in the time domain.

[0156] On the terminal side,

[0157] In step 1, the terminal performs downlink synchronization and obtains the frequency domain position of the downlink synchronization, including the RB index corresponding to the lowest index of the frequency domain carrier of the downlink synchronization or the RB index corresponding to the highest index of the frequency domain carrier of the downlink synchronization, or the RB index corresponding to the center carrier of the downlink synchronization.

[0158] The terminal generates a pilot sequence [s0, ..., sN-1] corresponding to the maximum bandwidth of the carrier according to the cell ID obtained during the downlink synchronization process.

[0159] The terminal determines the time-frequency resource position of the downlink broadcast according to the correspondence between downlink synchronization and downlink broadcast. The agreed relationship between the time-frequency resources of the downlink broadcast and downlink synchronization can be that the center carrier position of the frequency domain position is the same, and PBCH uses different carriers or RB numbers synchronized with the downlink.

[0160] The time domain position of the broadcast can also locate the start and end positions of the broadcast symbols through the agreed relationship of downlink synchronization.

[0161] In step 2, the terminal determines the time-frequency resource position of the broadcast through the correspondence between downlink synchronization and broadcast, and reads the broadcast message to obtain the time-frequency resource position of CORESET1.

[0162] In step 3, the terminal determines the pilot sequence [si,...,sj] on CORESET1 according to the offset value offset1 between the frequency domain starting position of CORESET1 and the carrier frequency domain reference position, where i and j are part of the pilot sequence of the entire carrier bandwidth. i = offset1*RSD, j = offset1*RSD+BWcoreset1*RSD-1, where BWcoreset1 is the bandwidth of CORESET1, RSD is the pilot density of the control channel, where 3RS per REG is taken, REG occupies 12 REs in the frequency domain, and is one OFDM symbol in the time domain.

[0163] In step 4, the terminal determines the time-frequency resource position of CORESET2 configured by the high-layer signaling by receiving the high-layer signaling.

[0164] In step 5, the terminal determines the pilot sequence [sm,...,sn] on CORESET2 according to the offset value offset2 between the frequency domain starting position of CORESET2 and the carrier frequency domain reference position, where m and n are the indexes of the pilot sequence of the entire carrier bandwidth. m = offset2*RSD, n = offset2*RSD+BWcoreset2*RSD-1, where BWcoreset2 is the bandwidth of CORESET2 configured by high-level signaling, and RSD is the pilot density of the control channel, where 3RS per REG are taken, and REG occupies 12 REs in the frequency domain and one OFDM symbol in the time domain.

[0165] Example 3

[0166] In this embodiment, there are multiple BWPs on one carrier, and the terminal transmits and receives data based on the BWPs in the carrier. Different BWPs may have different CORESET configurations.

[0167] The base station divides multiple BWPs on one carrier. For a UE, there is only one activated BWP at a time, but for multiple UEs, there may be multiple activated BWPs. In this way, when the base station serves different terminals, there may be multiple activated BWPs.

[0168] by Fig. 9 For example, the base station allocates a CORESET1 with a bandwidth equal to BWP on BWP1. At the same time, the base station allocates BWP2 with a bandwidth greater than BWP1 to a terminal, and a CORESET2 with the same bandwidth is also configured on BWP2.

[0169] The base station generates the DMRS sequence [s0, s1, ..., sN-1] of the CORESET present in BWP1, N = BW_coreset1*RSD, where BW_coreset1 is the bandwidth of CORESET1. The order of placement of the generated sequence on CORESET1 is as follows: Fig.10 As shown:

[0170] Fig.10 The frequency domain of BWP2 includes the frequency domain resources of BWP1, and BWP2 also has some resources in the lower frequency band. The CORESET bandwidth on BWP1 is BWP1.

[0171] For CORESET1 in BWP1, its pilot sequence is generated according to the bandwidth of BWP1, and the generated pilot sequence is placed on the corresponding frequency domain resources s0, s1, ..., sN-1 in order from low frequency to high frequency.

[0172] Furthermore, the base station configures the control resource set CORESET2 for the terminal through high-level signaling. The corresponding frequency domain bandwidth is the same as BWP2. At this time, the base station generates a pilot sequence [s0, s1, ...sN-1, sN, ...sN'-1] according to the bandwidth of CORESET2, where N' = BW_coreset2*RSD. When mapping the pilot sequence, the terminal places the pilot from the starting position of CORESET1. The mapping result is that the pilot sequence of the overlapping CORESET area on BWP1 and BWP2 is the same. For the low-frequency area of ​​BWP2 that exceeds BWP1, the base station maps the sN, ...sN'-1 sequence to the pilot carrier. The corresponding formula 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 as follows. Fig.10 shown.

[0173] Example 4

[0174] In this embodiment, the base station first configures the CORESET for initial access, called RMSI CORESET. Before completing the interaction with the terminal, the base station cannot configure the carrier bandwidth, the absolute starting position of CORESET or BWP relative to the carrier, and the parameters for initializing the user pilot sequence for the terminal.

[0175] At this time, the base station initializes the pilot sequence of RMSI CORESET according to the cell ID, and the sequence length is the sequence length corresponding to RMSI CORESET. After the terminal and the base station complete the interaction, the base station can configure another CORESET through the terminal, recorded as CORESET2. The base station configures the following attributes of CORESET2:

[0176] 1) ID used for sequence generation, denoted as ID_coreset;

[0177] 2) The time and frequency resource location of CORESET;

[0178] 3) The offset of the frequency domain starting position of CORESET relative to the starting index of the carrier bandwidth;

[0179] 4) The time-frequency resource location of RMSI CORESET.

[0180] After the terminal completes access, the base station can inform the RMSI CORESET and other CORESET offsets relative to PRB0 through high-layer signaling.

[0181] The base station generates a pilot sequence of the bandwidth corresponding to CORESET2 based on ID_coreset2. When the pilot sequence of CORESET2 conflicts with the pilot sequence of RMSI CORESET, the pilot sequence of RMSI CORESET is retained and the pilot sequence of CORESET2 is shielded.

[0182] For example Fig.11 In the process, the base station first generates the pilot sequence corresponding to the RMSI CORESET according to the cell ID. After the terminal in the network completes the initial access, the base station can configure additional CORESETs for it. If these CORESETs overlap with the RMSI CORESET in the frequency domain, the pilot sequence of the RMSI CORESET is retained and the pilots of other CORESETs in the overlapping position are shielded.

[0183] On the terminal side,

[0184] In step 1, the terminal first performs downlink synchronization, obtains time-frequency synchronization and cell ID, determines the location of the broadcast channel through the downlink synchronization location, reads the time-frequency resource location of the RMSI CORESET, and the bandwidth of the RMSI CORESET is recorded as bw_RMSI;

[0185] 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. RSD is the pilot density of PDCCH, where the pilot density is 3RS per REG. The terminal reads the system message to obtain the configuration information required for initial access;

[0186] In step 3, the terminal accesses the network, receives the high-level signaling configured by the base station, and determines the time-frequency resource location of the high-level configured CORESET. This CORESET is recorded as CORESET2, and the bandwidth is recorded as bw_coreset2.

[0187] The high-layer signaling received by the terminal also includes the offset offset_coreset2_prb0 of CORESET2 relative to the starting position PRB0 of the absolute frequency domain index of the entire carrier. The terminal also obtains the offset offset_RMSIcoreset_prb0 of RMSI CORESET relative to PRB0 through the high-layer signaling.

[0188] In step 4, the terminal determines the overlapping position of CORESET2 and RMSI CORESET based on offset_coreset2_prb0, offset_coreset2_prb0, bw_RMSI and bw_coreset2.

[0189] 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 overlaps with the control channel of the RMSI in the frequency domain. If there is overlap, channel estimation is performed in the overlapping area according to the pilot corresponding to the RMSI CORSET.

[0190] Example 5

[0191] If CORESET and BWP appear at the same time, we assume that the bandwidth of CORESET is the same as the bandwidth of BWP. The bandwidths of the two can also be different, such as Fig.12 As shown:

[0192] The base station first defines the configuration of the BWP. Fig.12 There are two BWPs, where the BWP carrying RMSI and the other BWP have an overlapping frequency domain region, 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.

[0193] In this embodiment, the base station first configures a CORESET for initial access, which is called RMSI CORESET. The bandwidth range of CORESET is called initial BWP. After completing the interaction with the terminal, the base station configures another BWP for the terminal through high-level signaling. The bandwidth is greater than the initial BWP and overlaps with the initial BWP. This BWP is recorded as BWP2. The base station configures the offset between BWP2 and PRB0 through high-level signaling, and further configures the specific frequency domain position of CORESET2 in BWP2.

[0194] The base station initializes the pilot sequence of RMSI CORESET according to the cell ID, and the sequence length is the sequence length corresponding to RMSI CORESET. After the terminal and the base station complete the interaction, the base station can configure another BWP through the terminal, recorded as BWP2. The base station configures the following attributes of BWP2:

[0195] 1) The time and frequency resource location of BWP;

[0196] 2) The offset of the frequency domain starting position of BWP relative to the starting index PRB0 of the carrier bandwidth;

[0197] 3) The frequency domain position of the CORESET within the BWP relative to the BWP.

[0198] After the terminal completes access, the base station can configure additional BWPs and corresponding CORESETs in other BWPs through high-level signaling. The base station can also inform the frequency domain offset offset_RSMI_PRB0 of the RMSI CORESET relative to PRB0.

[0199] The base station generates the pilot sequence [s0, s1, ... sN-1] corresponding to 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 its frequency domain position relative to the starting frequency domain resource RB index of BWP2 is recorded as offset_bwp2, and the base station configures offset_bwp2 and bw_coreset2 to the terminal through high-level signaling.

[0200] The base station calculates the frequency domain carrier position of CORESET2 of BWP2. If the frequency domain position has a pilot sequence conflict with the RMSI CORESET of BWP1, the base station retains the RMSI CORESET pilot sequence of BWP1 in the conflicting area and maps the pilot sequence corresponding to CORESET2 in the non-overlapping area.

[0201] For example Fig.12In the example, the base station first generates the pilot sequence of the corresponding RMSI CORESET according to the cell ID. After the terminal completes the initial access, the base station configures BWP2 and the corresponding CORESET2 for it. The base station calculates the pilot sequence corresponding to the non-overlapping area according to the offset of BWP and the frequency domain offset of CORESET2 and BWP2. When the non-overlapping area is the low-frequency part, the pilot index of the non-overlapping area is [s0, s1, ... sK], where K = (offset + offset_bwp2) * RSD; when the non-overlapping area is the high-frequency part, the pilot index of the non-overlapping area is [sk, sk+1, ... sN], then k = (offset1 + bw_overlap) * RSD, N = (offset1 + bw_overlap) * RSD, where offset1 is the offset of CORESET2 relative to the starting position of CORESET2, and bw_overlap is the bandwidth occupied by the overlapping area. Fig.13 shown.

[0202] In this embodiment, the frequency domain resources of BWP2 include the frequency domain resources of BWP1. Other situations include that BWP2 has the same bandwidth as BWP1, the CORESETs in the two BWPs are also the same, or BWP2 is larger than BWP1 but the two partially overlap, BWP1 occupies more high (low) carrier frequency areas, and BWP2 occupies more low (high) carrier frequency areas. The generation of pilot sequences for these overlapping situations will not be repeated. The idea is to calculate the actual overlapping position based on the offset, and retain a CORESET pilot at the overlapping position. The calculation process is basically the same as the above content.

[0203] On the terminal side,

[0204] In step 1, the terminal first performs downlink synchronization, obtains time-frequency synchronization and cell ID, determines the location of the broadcast channel through the downlink synchronization location, reads the time-frequency resource location of the RMSI CORESET, and the bandwidth of the RMSI CORESET is recorded as bw_RMSI, which is also the bandwidth of the initial BWP;

[0205] 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. RSD is the pilot density of PDCCH, where the pilot density is 3RS per REG. The terminal reads the system message to obtain the configuration information required for initial access;

[0206] In step 3, the terminal accesses the network and receives the high-level signaling configured by the base station to determine the time-frequency resource location of the high-level configuration BWP2 and the relative offset between CORESET2 configured in BWP2 and BWP2. The offset between BWP2 and the initial BWP is recorded as offset. This offset can be positive or negative. In this example,;

[0207] The high-level signaling received by the terminal also includes the offset offset_coreset2_prb0 of BWP2 relative to the starting position PRB0 of the absolute frequency domain index of the entire carrier. The terminal also obtains the offset offset_RMSIcoreset_prb0 of RMSI CORESET relative to PRB0 through the high-level signaling.

[0208] In step 4, the terminal determines the overlapping position and overlapping bandwidth of CORESET2 and RMSI CORESET according to offset_coreset2_prb0, offset_coreset2_prb0, bw_RMSI and bw_coreset2.

[0209] 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 overlaps with the control channel of the RMSI in the frequency domain. If there is overlap, channel estimation is performed in the overlapping area according to the pilot corresponding to the RMSI CORSET.

[0210] Example 6

[0211] In the above-mentioned embodiments 1 to 4, there is always an RMSI CORESET and a CORESET configured at a higher level overlapping. In this embodiment, two CORESETs configured at higher levels overlap. We assume that the bandwidth of the CORESET is different from the bandwidth of the BWP.

[0212] The base station first defines the configuration of the two BWPs and configures the CORESET of the two BWPs through high-level signaling. Fig.14 There are two BWPs in the PRB0, which are respectively denoted as BWP1 and BWP2. In this embodiment, both BWPs are relatively offset from PRB0.

[0213] In this embodiment, since the two BWPs and the corresponding CORESETs are both configured by a high-level layer, the same ID can be configured for them through high-level signaling to initialize the sequence.

[0214] In this case, the two terminals always know the offset of CORESET relative to PRB0, so 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 both start with PRB0 to generate the same sequence, so there will be no ambiguity in the overlapping area.

[0215] This method is suitable for ensuring that the CORESET configured by high-level signaling does not conflict with the RMSI CORESET resources. At this time, the base station generates and maps the pilot sequence according to the carrier bandwidth. Regardless of whether the CORESETs of the two terminals conflict, the pilots themselves will never conflict.

[0216] On the terminal side,

[0217] In step 1, terminal 1 receives high-level signaling to learn the BWP corresponding to the terminal and the CORESET corresponding to the BWP, which are recorded as BWP1 and CORESET1. Terminal 2 receives high-level signaling to learn the BWP corresponding to the terminal and the CORESET corresponding to the BWP, which are recorded as BWP2 and CORESET2.

[0218] The configuration ID received by terminal 1 and terminal 2 for generating CORESET DMRS is recorded as ID_dmrs, and the ID_dmrs configured by terminal 1 and terminal 2 are the same.

[0219] In step 2, terminal 1 and terminal 2 obtain offsets of BWP1 and BWP2 for carrier bandwidth PRB0, namely offset_bwp1 and offset_bwp2, and the terminal further obtains offsets of CORESET1 and CORESET2 relative to the BWP, namely offset_coreset1 and offset_coreset2;

[0220] In step 3, terminal 1 and terminal 2 calculate the final offset of CORESET relative to PRB0 according to their respective BWP offsets and the BWP offset of CORESET relative to which it belongs, and calculate the DMRS sequence at the location of CORESET;

[0221] Since the terminals all generate sequences according to the relative PRB0 and the same initialization ID, the terminals use the same pilot sequence in the overlapping area, and no pilot conflict will occur in this case.

[0222] Example 7

[0223] The base station first defines the configuration of the two BWPs and configures the CORESET of the two BWPs through high-level signaling. Fig.15 There are two BWPs in the PRB0, which are respectively denoted as BWP1 and BWP2. In this embodiment, both BWPs are relatively offset from PRB0.

[0224] In this embodiment, since both BWPs and the corresponding CORESETs are configured by the high-level layer, the same ID can be configured for them through high-level signaling to initialize the sequence. In addition, the base station configures the following attributes of the CORESET:

[0225] 1) ID used to initialize the sequence;

[0226] 2) A field used to identify whether it is a broadband DMRS;

[0227] The two terminals always know the offset of CORESET relative to PRB0, so 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 both start with PRB0 to generate the same sequence, so there will be no ambiguity in the overlapping area.

[0228] At the same time, in order to achieve scheduling flexibility, a broadband attribute field 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, it is initialized according to the configured ID and the pilot sequence generation and sequence mapping within the CORESET range are performed.

[0229] This method provides flexibility for scheduling. The base station understands the CORESETs configured by different UEs. If different CORESETs do not overlap, the base station can generate a pilot sequence according to the CORESET. The initialization process is initialized according to the configured ID. If different CORESETs overlap, the base station sets the broadband identifier to generate a pilot sequence according to the default ID and maps the pilot according to the relative position with PRB0.

[0230] On the terminal side,

[0231] In step 1, terminal 1 receives high-level signaling to learn the BWP corresponding to the terminal and the CORESET corresponding to the BWP, which are denoted as BWP1 and CORESET1;

[0232] Terminal 1 receives the configuration ID for generating CORESET DMRS, which is recorded as ID_dmrs.

[0233] Terminal 1 receives the broadband attribute configuration of CORESET.

[0234] In step 2, terminal 1 obtains an offset of BWP1 for carrier bandwidth PRB0, which is offset_bwp1. The terminal further obtains an offset of CORESET1 relative to the BWP, which is recorded as offset_coreset1.

[0235] In step 3, terminal 1 reads the CORESET broadband attribute field. If the broadband attribute field is set, the final offset of CORESET relative to PRB0 is calculated based on the respective BWP offsets and the BWP offset of CORESET relative to which it belongs, and the DMRS pilot sequence at the location of CORESET is calculated;

[0236] If terminal 1 reads the CORESET broadband attribute field, if the broadband 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.

[0237] Example 8

[0238] In this embodiment, the base station uses a common pilot offset for all CORESETs to ensure that there is no ambiguity in the pilot sequence in the overlapping area.

[0239] In step 1, the base station generates a pilot sequence length that is twice the length required for the entire carrier bandwidth, with the lowest frequency domain RB index of the synchronization signal as the starting position, and the pilot sequence value increases relative to the high-frequency position of the starting position, and decreases relative to the low-frequency position of the starting position.

[0240] The pilot sequence length required for the entire bandwidth is N, but the pilot sequence is generated according to twice the length and the lowest RB index in the frequency domain of the downlink synchronization corresponds to the midpoint of the pilot sequence, that is, the pilot sequence with the lowest RB index corresponding to the downlink synchronization is sN, sN+1, sN+2. Here it is assumed that one REG has 3 REs carrying pilots, and the pilot sequences of the adjacent REGs with frequency domain positions lower than the downlink synchronization are sN-3, sN-2, and sN-1.

[0241] The reference point can also select the RB index where the center frequency domain of the synchronization channel is located, or the RB index where the highest frequency domain of the synchronization signal is located, or the RB index corresponding to the lowest frequency domain index of the frequency domain where the broadcast channel is located, or the RB index where the center frequency of the broadcast channel is located, or the RB index corresponding to the highest frequency domain index of the broadcast channel.

[0242] The REG where the reference point is located can also be offset in a small range. For example, the pilot sequence of the lowest RB index corresponding to downlink synchronization is sN-1, sN, sN+1,

[0243] The base station generates a pilot sequence [s0, s1, ..., sN-1, sN, sN+1, ..., s2N-1] that is twice the bandwidth of the entire carrier according to the maximum bandwidth of the carrier, where N = BWmax*RSD, and BWmax is the maximum bandwidth corresponding to the carrier.

[0244] In step 2, the base station notifies the time-frequency resource location of CORESET1 through the broadcast channel. The base station determines the pilot sequence [si,...,sj] on CORESET1 according to the offset value offset1 between the frequency domain starting position of CORESET1 and the carrier frequency domain reference position, where i and j are part of the above-mentioned entire carrier bandwidth pilot sequence. 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 are taken per REG, and REG occupies 12 REs in the frequency domain and one OFDM symbol in the time domain.

[0245] In step 3, the base station configures the time-frequency resource position of CORESET2 for the terminal through high-level signaling. The base station determines the offset offset2 from the reference frequency domain position based on the lowest frequency domain index of CORESET and calculates the pilot sequence of CORESET2. [sm,...,sn], where m and n are part of the above-mentioned entire carrier bandwidth pilot sequence. 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 12 REs in the frequency domain, and one OFDM symbol in the time domain.

[0246] On the terminal side,

[0247] In step 1, the terminal performs downlink synchronization and obtains the frequency domain position of the downlink synchronization, including the RB index corresponding to the lowest index of the frequency domain carrier of the downlink synchronization or the RB index corresponding to the highest index of the frequency domain carrier of the downlink synchronization, or the RB index corresponding to the center carrier of the downlink synchronization.

[0248] The terminal generates a pilot sequence [s0, ..., sN-1, sN, ...s2N-1] corresponding to twice the sequence length of the maximum bandwidth of the corresponding carrier according to the cell ID obtained during the downlink synchronization process.

[0249] The terminal determines the time-frequency resource position of the downlink broadcast according to the correspondence between downlink synchronization and downlink broadcast. The agreed relationship between the time-frequency resources of the downlink broadcast and downlink synchronization can be that the center carrier position of the frequency domain position is the same, and PBCH uses different carriers or RB numbers synchronized with the downlink.

[0250] The time domain position of the broadcast can also locate the start and end positions of the broadcast symbols through the agreed relationship of downlink synchronization.

[0251] In step 2, the terminal determines the time-frequency resource position of the broadcast through the correspondence between downlink synchronization and broadcast, and reads the broadcast message to obtain the time-frequency resource position of CORESET1.

[0252] In step 3, the terminal determines the pilot sequence [si,...,sj] on CORESET1 according to the offset value offset1 between the frequency domain starting position of CORESET1 and the carrier frequency domain reference position, where i and j are part of the pilot sequence of the entire carrier bandwidth. 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, where 3RS per REG is taken, REG occupies 12 REs in the frequency domain, and is one OFDM symbol in the time domain.

[0253] The pilot position corresponding to the reference point may also have a small offset. If the pilot corresponding to the reference point is sN+1, the index value of the above pilot is i=N+offset1*RSD+1, j=N+offset1*RSD+BWcoreset1*RSD, and similar operations are performed for other offsets.

[0254] In step 4, the terminal determines the time-frequency resource position of CORESET2 configured by the high-layer signaling by receiving the high-layer signaling.

[0255] In step 5, the terminal determines the pilot sequence [sm,...,sn] on CORESET2 according to the offset value offset2 between the frequency domain starting position of CORESET2 and the carrier frequency domain reference position, where m and n are the indexes of the pilot sequence of the entire carrier bandwidth. m = N + offset2*RSD, n = N + offset2*RSD + BWcoreset2*RSD-1, where BWcoreset2 is the bandwidth of CORESET2 configured by high-level signaling, and RSD is the pilot density of the control channel, where 3RS per REG are taken, and REG occupies 12 REs in the frequency domain and one OFDM symbol in the time domain.

[0256] Example 9

[0257] This paper discusses the generation method of PDCCH DMRS pilot sequence with multiple numerologies in the same carrier bandwidth. A carrier bandwidth is divided into multiple BWPs, and different BWPs may be configured with different numerologies. If the BWPs corresponding to different numerologies do not overlap in the frequency domain, the interference between the numerologies will be relatively small, and they can work at the same time; if the two overlapping BWPs use the same numerology, there will be no interference between the numerologies, and they can work at the same time. The following discusses different situations.

[0258] In step 1, the base station defines two BWPs in one carrier bandwidth. The bandwidths corresponding to the two BWPs are different, but there is overlapping bandwidth. Fig.16 The resources corresponding to the two BWPs are shown in the left and right dashed boxes respectively. The frequency domain resources corresponding to the left dashed box are recorded as BWP1, and the frequency domain resources corresponding to the right dashed box are recorded as BWP2.

[0259] The base station configures BWP1 for UE1, and the offset between BWP1 and PRB0 is recorded as offset1. The base station configures BWP2 for UE2, and the offset between BWP2 and PRB0 is recorded as offset2. The base station also notifies each BWP of the starting position for calculating the pilot.

[0260] like Fig.16 As shown, if the base station configures only the offset of BWP relative to 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 to be inconsistent, such as Fig.16 The starting pilot sequence index of the middle right frame is 9 and the pilot sequence index of the corresponding carrier position in the left frame is 8, which will cause a conflict.

[0261] Therefore, in addition to notifying the offset of the BWP relative to PRB0, it is also necessary to notify the generation of the pilot within the BWP. The offset relative to the current BWP is based on the numerology corresponding to the BWP.

[0262] For BWP2, the starting position corresponding to the BWP offset offset2 notified by the base station is the position numbered 9 in the reference numerology, and the notified sequence index offset offset_seq2=-1.

[0263] For BWP1, the starting position corresponding to the BWP offset offset1 notified by the base station is the position numbered 7 of the reference numerology, and the notified sequence index offset offset_seq1=0.

[0264] In step 2, the base station generates a pilot sequence [s0, ..., sN-1] of the carrier bandwidth according to the reference numerology;

[0265] In step 3, the base station determines the actually mapped pilot sequence according to the offset of each BWP relative to PRB0 and the sequence index offset of the pilot sequence generated for each BWP.

[0266] For example, for BWP1 of UE1, the calculation method of the pilot index start value is seq_start=offset1+offset_seq1=7+0;

[0267] The end position is related to the bandwidth of BWP. Assuming that the bandwidth of BWP1 is BW_BWP1, the pilot index end value is:

[0268] Seq_end=seq_start+BW_BWP1*RSD-1, where BW_BWP1 is the bandwidth of BWP configured for UE1, its frequency domain granularity is the number of RBs, and RSD is the pilot density.

[0269] The method for calculating the pilot sequence index of the BWP configured by the base station for another terminal is the same as that for UE1, and will not be repeated here.

[0270] The BWP allocation and the corresponding pilot span here are only for illustration purposes. The bandwidth and numerology configurations of other BWPs also use this method.

[0271] In addition, the pilot index numbering starts from 1 in this embodiment, and other numbering forms are also within the protection scope of this embodiment. The notified offset can be based on the subcarrier width corresponding to the reference numerology or the numerology corresponding to the BWP as a reference. These differences can be achieved through the method of equal transformation through this method, so they are also within the protection scope of this application.

[0272] This embodiment describes the case where two numerologies are the same but the bandwidth configurations are different. Another way is that the two overlapping numerologies are different. In this case, the base station notifies each terminal of two offsets in the above manner. The terminal can confirm the pilot sequence start index of the terminal configuration BWP by the two offsets and determine the final pilot sequence according to the CORESET bandwidth.

[0273] On the terminal side,

[0274] In step 1, the terminal receives a high-layer signaling from the base station to determine an offset between the configured BWP and PRB0. The terminal receives the BWP to generate a relative offset index offset_seq of a pilot sequence.

[0275] In step 2, the terminal generates a pilot sequence [s0, ..., sN-1] for the entire bandwidth according to the carrier bandwidth and reference numerology.

[0276] In step 3, the terminal confirms the start and end positions of the DMRS pilot sequence of the BWP according to the carrier index and pilot offset index of the BWP relative to PRB0.

[0277] In addition, when the terminal obtains the CORESET configured by the base station, the terminal can also obtain the frequency domain position of the CORESET in the current BWP. The terminal's index on the frequency domain resources where the BWP is located can further extract the pilot sequence where the CORESET position appears. For example, the pilot sequence calculated by the terminal on the BWP is recorded as [s'0, s'1, ..., s'N-1], and the starting position offset of the CORESET relative to the BWP is recorded as offset_coreset. The terminal can further calculate the corresponding DMRS sequence index on the CORESET based on this offset, that is, the pilot starting sequence seq_coreset_start of the CORESET = offset_coreset*RSD.

[0278] Example 10

[0279] like Fig.17 As shown, the base station is configured in the manner of Example 9, but does not configure the offset index of a certain BWP pilot sequence. The base station determines the intercepted sequence range according to the multiple relationship between the numerology and the reference numerology.

[0280] The terminal side determines the intercepted sequence according to the multiple relationship between numerology and reference numerology.

[0281] Although the embodiments disclosed in the present invention are as above, the contents are only embodiments adopted for facilitating understanding of the technical solution of the present invention, and are not used to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modifications and changes in the form and details of the implementation without departing from the core technical solution disclosed in the present invention, but the protection scope defined by the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A control channel pilot generation method, characterized in that: Applied to base stations, including: Sending a broadcast channel and a synchronization signal to a terminal at a preset frequency domain position of a carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal; and broadcasting frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal through the broadcast channel; After one or more terminals access, a high-level configuration signaling is sent to the access terminal, wherein the high-level configuration signaling includes other control resource sets other than the control resource set for initial access of the access terminal, and the high-level configuration signaling is used to notify the access terminal of the frequency domain offset position information of the control resources in the other control resource sets relative to the starting position of the carrier.

2. The method according to claim 1, characterized in that: The control resource set for initial access and the pilot sequences of other control resource sets are generated by using the same or different initialization identification IDs; When the frequency domain resources of the initially accessed control resource set do not overlap with those of other control resource sets, the pilot initialization IDs of the initially accessed control resource set and other control resource sets are the same or different; When the frequency domain resources of the initially accessed control resource set overlap with those of other control resource sets and the initially accessed control resource set and other control resource sets work simultaneously, the pilot initialization IDs of the initially accessed control resource set and other control resource sets are the same.

3. The method according to claim 2, characterized in that: When the initially accessed control resource set and other control resource sets use the same pilot initialization ID, a pilot sequence is generated and mapped according to a frequency domain relative offset and a common reference frequency point between the initially accessed control resource set and other control resource sets.

4. The method according to claim 2, characterized in that: When the initially accessed control resource set overlaps with frequency domain resources of other control resource sets and the initially accessed control resource set and other control resource sets work simultaneously, the overlapping frequency domain resources adopt the pilot sequence of the initially accessed control resource set.

5. The method according to claim 4, characterized in that: For different terminals or different control resource sets of the same terminal, the pilot sequence generation method of other control resource sets is configured through high-level parameters.

6. The method according to claim 3, characterized in that: The common reference frequency point includes one of the following: the starting frequency domain position of the broadcast channel or synchronization signal, the center frequency domain position of the broadcast channel or synchronization signal, the ending frequency domain position of the broadcast channel or synchronization signal, and the frequency domain position of the carrier absolute index.

7. The method according to claim 6, characterized in that: Generating and mapping a pilot sequence according to the frequency domain relative offset and common reference frequency point between the initially accessed control resource set and other control resource sets includes: When mapping is performed with a common reference frequency, the pilot sequence index and the pilot carrier index are placed in a sequence in a cyclic modulo manner.

8. The method according to claim 5, characterized in that: When the length of the generated pilot sequence is greater than the carrier bandwidth, the common reference frequency corresponds to a pilot sequence at a fixed position in the pilot sequence.

9. The method according to claim 5, characterized in that: For different terminals or different control channels of the same terminal, the pilot sequences of other control resource sets generated by high-level configuration parameters include: The pilot sequences of other control resource sets are generated according to the configured pilot sequence generation ID, the default pilot sequence generation ID or the broadband identification field.

10. The method according to claim 5, characterized in that: For different terminals or different control channels of the same terminal, when other control resource sets of different terminals or different control channels overlap and other control resource sets of different terminals or different control channels work simultaneously, the enable field is set and a pilot sequence is generated according to the default or configured ID.

11. The method according to claim 8, characterized in that: The fixed position of the pilot sequence corresponding to the common reference frequency point is a sequence corresponding to the middle position of the pilot sequence.

12. A control channel pilot generation method, characterized in that: Applied to base stations, including: Sending a broadcast channel and a synchronization signal to a terminal at a preset frequency domain position of a carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal; and broadcasting frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal through the broadcast channel; After one or more terminals access, a high-level configuration signaling is sent to the access terminal, wherein the high-level configuration signaling includes an offset of a pilot sequence intercepted from the entire carrier by a bandwidth part BWP configured with multiple subcarrier spacing.

13. The method according to claim 12, characterized in that: The high-level configuration signaling also includes: carrier spacing information.

14. A control channel pilot generation method, characterized in that: Applied to terminals, including: Determine a pilot sequence according to the initial access control resource set configured by the received broadcast channel or synchronization signal and the frequency domain offset position information of the broadcast channel or synchronization signal; The pilot sequence of the control resource is determined according to the frequency domain offset position information of the control resource in the other control resource set configured by the received high-level configuration signaling relative to the starting position of the carrier.

15. The method according to claim 14, characterized in that: Receiving high-level configuration signaling to obtain an offset of a pilot sequence intercepted by a control channel resource set received by the terminal; The pilot sequence on the control resource set is determined according to the received control channel resource set relative to the carrier start offset and the pilot sequence interception offset.

16. The method of claim 14, wherein: When the initially accessed control resource set and other control resource sets use the same pilot initialization ID, a pilot sequence is generated and mapped according to a frequency domain relative offset and a common reference frequency point between the initially accessed control resource set and other control resource sets.

17. The method of claim 14, wherein: When the initially accessed control resource set overlaps with frequency domain resources of other control resource sets and the initially accessed control resource set and other control resource sets work simultaneously, the overlapping frequency domain resources adopt the pilot sequence of the initially accessed control resource set.

18. The method of claim 16, wherein: The common reference frequency point includes one of the following: the starting frequency domain position of the broadcast channel or synchronization signal, the center frequency domain position of the broadcast channel or synchronization signal, the ending frequency domain position of the broadcast channel or synchronization signal, and the frequency domain position of the carrier absolute index.

19. The method of claim 14, wherein: When mapping is performed with a common reference frequency point, the pilot sequence index and the pilot carrier index are selected in a cyclic modulo manner.

20. The method of claim 14, wherein: The pilot sequence is generated in a manner that is greater than the length of the carrier bandwidth, and the common reference frequency point corresponds to the pilot sequence at a fixed position in the pilot sequence.

21. A control channel pilot generating device, characterized in that: Set up at the base station, including: A first broadcast module, configured to send a broadcast channel and a synchronization signal to a terminal at a preset frequency domain position of a carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal and frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal; The first configuration module is configured to send high-level configuration signaling to the access terminal after one or more terminals access, wherein the high-level configuration signaling includes other control resource sets other than the control resource set for initial access of the access terminal, and notify the access terminal of the frequency domain offset position information of the control resources in the other control resource sets relative to the carrier start position through the high-level configuration signaling.

22. A control channel pilot generating device, characterized in that: Set up at the base station, including: A second broadcast module is configured to send a broadcast channel and a synchronization signal to the terminal at a preset frequency domain position of the carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal and frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal; The second configuration module is configured to send a high-level configuration signaling to the access terminal after one or more terminals access, wherein the high-level configuration signaling includes an offset of a pilot sequence intercepted from the entire carrier by a bandwidth part BWP configured with multiple subcarrier intervals.

23. A control channel pilot generating device, characterized in that: Set in the terminal, including: An access module, configured to determine a pilot sequence according to an initial access control resource set configured by a received broadcast channel or synchronization signal and frequency domain offset position information of the broadcast channel or synchronization signal; The resource module is configured to determine the pilot sequence of the control resource according to the frequency domain offset position information of the control resource in other control resource sets configured by the received high-level configuration signaling relative to the carrier start position.

24. A control channel pilot generation device, comprising: A memory and a processor; characterized in that: The memory is used to store a program for generating a control channel pilot; When the program for generating a control channel pilot is read and executed, the processor performs the following operations: Sending a broadcast channel and a synchronization signal to the terminal at a preset frequency domain position of the carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal and frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal; After one or more terminals access, a high-level configuration signaling is sent to the access terminal, wherein the high-level configuration signaling includes other control resource sets other than the control resource set for initial access of the access terminal, and the high-level configuration signaling is used to notify the access terminal of the frequency domain offset position information of the control resources in the other control resource sets relative to the carrier start position.

25. A storage medium, characterized in that: storing a program for performing control channel pilot generation; When the control channel pilot generation program is read and executed, the following operations are performed: Sending a broadcast channel and a synchronization signal to the terminal at a preset frequency domain position of the carrier, wherein the broadcast channel includes a control resource set initially accessed by the terminal and frequency domain offset position information of the control resource set initially accessed and the broadcast channel or the synchronization signal; After one or more terminals access, a high-level configuration signaling is sent to the access terminal, wherein the high-level configuration signaling includes other control resource sets other than the control resource set for initial access of the access terminal, and the high-level configuration signaling is used to notify the access terminal of the frequency domain offset position information of the control resources in the other control resource sets relative to the carrier start position.

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