CN111669238B

CN111669238B - High-frequency discovery signal transmission method, device and system

Info

Publication number: CN111669238B
Application number: CN202010414993.2A
Authority: CN
Inventors: 刘晓峰; 杜滢; 闫志宇; 焦慧颖; 沈霞; 魏贵明; 徐菲
Original assignee: China Academy of Information and Communications Technology CAICT
Current assignee: China Academy of Information and Communications Technology CAICT
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2022-03-29
Anticipated expiration: 2040-05-15
Also published as: CN111669238A

Abstract

The application discloses a high-frequency discovery signal transmission method, which is used for an unlicensed frequency band of a 5G system and comprises the steps of transmitting SSBs at 64 preselected positions within the length of a half frame; the 64 preselected locations are distributed within 32 time slots, each time slot containing 2 preselected locations; the 14 symbols contained in each time slot are counted as 0 th to 13 th symbols, and in each time slot, the 1 st preselected position is located at the 2 nd to 5 th symbols, and the 2 nd preselected position is located at the 6 th to 9 th symbols; or, in each time slot, the 1 st preselected position is located at the 4 th to 7 th symbols, and the 2 nd preselected position is located at the 8 th to 11 th symbols. The application also comprises a terminal device, a network device and a system for the method. The method and the device solve the problem of how to realize discovery signal transmission in the high frequency band, can be used in the high frequency band above 6GHz, and particularly can provide better access performance for NR-based unauthorized frequency band access equipment in the unauthorized frequency band above 6 GHz.

Description

High-frequency discovery signal transmission method, device and system

Technical Field

The present application relates to the field of mobile communications technologies, and in particular, to a method, a device, and a system for transmitting a high frequency discovery signal.

Background

The 5G new air interface (NR) has completed both versions R15 and R16, supporting up to 52.6GHz according to the current version. According to the initial vision of 5G, the design of 5 GNRs needs to support frequency usage of 100 GHz. In higher frequency bands, it is desirable to consider supporting larger bandwidths while overcoming the adverse effects of large path loss, and therefore to enhance existing NR designs.

Currently, NR already supports a downlink data shared channel (PDSCH) and a downlink control channel (PDCCH) at several subcarrier intervals, such as 15kHz, 30kHz, 60kHz, 120kHz, and the like. Compared with the prior art, the frequency band with the bandwidth of more than 52.6GHz is wider, a large number of unauthorized frequency bands exist, the design of adopting larger subcarrier spacing and considering unauthorized access needs to be considered, and when the larger subcarrier spacing and the characteristics of the unauthorized frequency bands need to be considered, how to send the synchronization signals, the broadcast signals and the related system messages needs to be redesigned. Currently, in NR 15, a design of 5 kinds of synchronization signal broadcast data blocks (SS/PBCH blocks, abbreviated as SSBs in this application) have been supported, and the supported subcarrier intervals are 15kHz, 30kHz, 120kHz, and 240 kHz. In the NRR16 version, two SSB designs are defined for 15kHz, 30kHz subcarrier spacing for unlicensed bands, with no established technical standard above the 6GHz band. The present invention provides an SSB that can support a larger subcarrier spacing in a high frequency band and a related discovery signal transmission method and apparatus.

Disclosure of Invention

The application provides a high-frequency discovery signal transmission method, equipment and system, which solve the problem of how to realize discovery signal transmission in a high-frequency band. The scheme of the application can be used in a high-frequency band above 6GHz, especially in an unauthorized frequency band above 6GHz, and can provide better access performance for NR-based unauthorized frequency band access equipment.

In a first aspect, an embodiment of the present application provides a high frequency discovery signal transmission method, which is used for transmitting SSBs at 64 preselected locations within a half frame length in an unlicensed frequency band of a 5G system;

the 64 preselected locations are distributed within 32 time slots, each time slot containing 2 preselected locations;

the 14 symbols contained in each time slot are counted as 0 th to 13 th symbols, and in each time slot, the 1 st preselected position is located at the 2 nd to 5 th symbols, and the 2 nd preselected position is located at the 6 th to 9 th symbols; or, in each time slot, the 1 st preselected position is located at the 4 th to 7 th symbols, and the 2 nd preselected position is located at the 8 th to 11 th symbols.

The 32 time slots are continuous, or the 32 time slots are divided into a plurality of groups of time slots with the same interval time slot, the number of the time slots of each group is the same, and the time slots in each group are continuous.

Preferably, the SSBs are transmitted at subcarrier spacings of 120kHz, 240kHz or 480 kHz.

Further preferably, the SSB is the same as the corresponding PDCCH subcarrier spacing; the PDCCH information corresponding to the SSB of the 1 st pre-selected location is located at the 0 th symbol, the PDCCH information corresponding to the SSB of the 2 nd pre-selected location is located at the 1 st symbol, and the time domain length of each PDCCH information is 1 symbol.

The SSBs have the same subcarrier interval with the corresponding PDCCH, and further preferably, when the 1 st preselected position is located at the 4 th to 7 th symbols and the 2 nd preselected position is located at the 8 th to 11 th symbols, the PDCCH information corresponding to the SSBs at the 1 st preselected position is located at the 0 th to 1 st symbols, the PDCCH information corresponding to the SSBs at the 2 nd preselected position is located at the 2 nd to 3 rd symbols, and the time domain length of each PDCCH information is 2 symbols.

When the PDCCH subcarrier spacing corresponding to the SSB is reduced, for example 1/2, the PDCCH information corresponding to the SSB at the 1 st pre-selected location is located at the 0 th symbol or the 7 th symbol of the slot where it is located, the PDCCH information corresponding to the SSB at the 2 nd pre-selected location is located at the 2 nd symbol or the 8 th symbol of the slot where it is located, and the time domain length of each PDCCH information is 1 symbol.

Preferably, the multiplexing mode of the SSB and the corresponding PDCCH is as follows: the multiplexing mode is as follows: the first multiplexing mode is non-overlapping in time domain, overlapping in frequency domain, or the second multiplexing mode is: the frequency domain and the time domain are not overlapped.

Preferably, the SSB includes at least one of the following information:

a subcarrier spacing of a PDCCH corresponding to the SSB; a multiplexing mode of the SSB and the corresponding PDCCH; a frequency domain position difference between the SSB and the corresponding PDCCH; a start symbol of the downlink control information; the time domain length of the downlink control information; and the frequency domain of the downlink control information occupies the resource number.

Preferably, the downlink channel indicated by the downlink control information corresponding to the SSB includes information indicating whether the 1 st preselected location and the 2 nd preselected location are actually transmitted.

In a second aspect, the present application further provides a network device, configured to implement the method according to any one of the embodiments of the first aspect of the present application. And the network equipment sends the SSB and the PDCCH information corresponding to the SSB.

Preferably, the present application proposes a network device, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to any of the embodiments of the first aspect of the present application.

In a third aspect, the present application further provides a terminal device, configured to implement the method in any of the embodiments of the first aspect of the present application. And the terminal equipment receives the SSB and the PDCCH information corresponding to the SSB.

Preferably, the present application proposes a terminal device, including: memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to any of the embodiments of the first aspect of the application.

In a fourth aspect, the present application also proposes a computer-readable medium on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method according to any one of the embodiments of the present application.

In a fifth aspect, the present application further provides a mobile communication system, which includes at least 1 embodiment of any terminal device in the present application and/or at least 1 embodiment of any network device in the present application.

The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:

the signal transmission method, the device and the communication system provided by the invention can well match the characteristics of high-frequency unauthorized and authorized spectrum, especially the condition that a frequency band above 52.6GHz needs to use a larger subcarrier interval to match the use of hundreds of megabandwidths. When the listen-before-send technology is used for high bandwidth access, the invention can effectively increase the access channel of the network equipment to transmit SSB and the PDSCH which is associated with the SSB and contains the rest system information and the PDCCH used for scheduling on the basis of ensuring fair coexistence with other systems.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic diagram of a communication system configuration and signaling configuration;

FIG. 2(a) is a SSB transmission pattern of the prior art approach four;

FIG. 2(b) is a SSB transmission pattern of prior art approach five;

FIG. 3 is a flow chart of an embodiment of a method of the present application;

FIG. 4 is a schematic diagram of the multiplexing mode of SSB and CORESET 0;

fig. 5(a) shows 120kHz subcarrier spacing with SSB preset positions of {2, 6} +14n, n being 0,1,2, … 32;

fig. 5(b) shows a 240kHz subcarrier spacing with SSB preset positions of {2, 6} +14n, n being 0,1,2, … 32;

fig. 5(c) shows a 480kHz subcarrier spacing with SSB preset positions of {2, 6} +14n, n being 0,1,2, … 32;

fig. 6(a) shows 120kHz subcarrier spacing with SSB preset positions of {4, 8} +14n, n being 0,1,2, … 32;

fig. 6(b) shows a 240kHz subcarrier spacing with SSB preset positions of {4, 8} +14n, n being 0,1,2, … 32;

fig. 6(c) shows a 480kHz subcarrier spacing with SSB preset positions of {4, 8} +14n, n being 0,1,2, … 32;

fig. 7(a) shows a subcarrier spacing of 120kHz, with SSB preset positions of {4, 8} +14n, n-0, 1,2, … 7,10,11,12 … 17,20,21,22, · 27,30,31,32, …, 37;

fig. 7(b) shows a subcarrier spacing of 240kHz, with SSB preset positions of {4, 8} +14n, n-0, 1,2, … 7,10,11,12 … 17,20,21,22,.. multidot.27, 30,31,32, …, 37;

fig. 7(c) shows a 480kHz subcarrier spacing with SSB preset positions of {4, 8} +14n, n-0, 1,2, … 7,10,11,12 … 17,20,21,22, · 27,30,31,32, …, 37;

fig. 8(a) shows 120kHz subcarrier spacing with SSB preset positions of {2, 6} +14n, n-0, 1,2, … 7,10,11,12 … 17,20,21,22, · 27,30,31,32, …, 37;

fig. 8(b) shows a 240kHz subcarrier spacing with SSB preset positions of {2, 6} +14n, n-0, 1,2, … 7,10,11,12 … 17,20,21,22, · 27,30,31,32, …, 37;

fig. 8(c) shows a 480kHz subcarrier spacing with SSB preset positions of {2, 6} +14n, n-0, 1,2, … 7,10,11,12 … 17,20,21,22, · 27,30,31,32, …, 37;

FIG. 9 is a flow chart of an embodiment of a method of the present application for use with a network device;

FIG. 10 is a flowchart of an embodiment of a method of the present application for a terminal device;

FIG. 11 is a schematic diagram of an embodiment of a network device;

FIG. 12 is a schematic diagram of an embodiment of a terminal device;

fig. 13 is a schematic structural diagram of a network device according to another embodiment of the present invention;

fig. 14 is a block diagram of a terminal device of another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a communication system configuration and a signaling configuration.

Consider a communication system consisting of network devices and terminal devices, as in fig. 1. One network device can simultaneously transmit and receive data to a plurality of terminal devices. The network equipment comprises a network data unit and a networkAnd a control unit. The terminal device includes a terminal data unit and a terminal control unit. The network data unit and the terminal data unit transmit data through a downlink data shared channel (PDSCH) and an uplink data shared channel (PUSCH). The network control unit and the terminal control unit exchange control information through a synchronization and broadcast channel (SSB), a downlink control channel (PDCCH), an uplink access channel (PRACH) and a control channel (PUCCH). The SSB sends the synchronizing signal and the broadcast information, and the terminal control unit receives the SSB to synchronize and acquire the basic system information. The PDCCH transmits Downlink Control Information (DCI) including specific transmission format-related contents of the PDSCH, PUSCH, and PUCCH. And after the data of the terminal data unit is received, the terminal control unit initiates access based on the PRACH to the network equipment according to the control information sent by the network control unit and the data receiving condition of the terminal data unit, or feeds back whether the data correctly receives the ACK/NACK information, or sends the data of the terminal to the network. The basic time transmission unit in the system is a symbol, and 14 symbols form a time slot. A time slot of length 1/2^KAnd ms, where K is a positive integer and corresponds to different subcarrier intervals, respectively, and for example, when K is 0,1,2,3, and 4, the subcarrier intervals correspond to 15kHz, 30kHz, 60kHz, 120kHz, and 240 kHz.

In the current standard, the SSB block time domain occupies 4 symbols for transmission. The SSB transmission starts in the first slot within a half frame (5ms) and there may be multiple candidate positions. For different subcarrier intervals, there are 5 time domain transmission modes of SSB:

the first method is as follows: for a 15kHz subcarrier spacing, the SSB start symbol number is {2,8} +14 · n. For the authorized frequency band, below 3GHz, n is 0 and 1; 3-6 GHz, wherein n is 0,1,2 and 3. For the unlicensed band, n is 0,1,2,3, 4.

The second method comprises the following steps: for a 30kHz subcarrier spacing, the SSB start symbol number is 4,8,16,20 +28 · n. N is 0 for 3GHz or less, and 0,1 for 3-6 GHz.

The third method comprises the following steps: for a 30kHz subcarrier spacing, the SSB starting symbol is numbered 2,8 +14 n. For the authorized frequency band, the symmetric frequency spectrum is below 3GHz and the asymmetric frequency spectrum is below 2.4GHz, and n is 0 and 1; symmetrical frequency spectrum 3 ~ 6GHz and asymmetrical frequency spectrum 2.4 ~ 6GHz, n is 0,1,2, 3. For unlicensed spectrum, n is 0,1,2,3,4,5,6,7,8, 9.

The method is as follows: for a 120kHz subcarrier spacing, the SSB start symbol number is {4,8,16,20} +28 · n. For 6-52.6 GHz, n is 0,1,2,3,5,6,7,8,10,11,12,13,15,16,17 and 18.

The fifth mode is as follows: for the 240kHz subcarrier spacing, the SSB starting symbol number is {8,12,16,20,32,36,40,44} +56 · n. For 6-52.6 GHz, n is 0,1,2,3,5,6,7 and 8.

In the frequency band above 6GHz, the current NR design mainly adopts the design of the mode four and the mode five, and fig. 2(a) - (b) respectively show the SSB transmission patterns of the mode four and the mode five. Based on the existing design, the distribution of SSBs exhibits a large difference as the subcarrier spacing increases. If the 120kHz subcarrier spacing is adopted, in two time slots, the SSB candidate positions are 4 positions (represented by gray filling in the figure) which appear in two-by-two succession, and up to 240kHz, in two time slots, the SSB block candidate positions are 4 candidates in a group, appear 2 times and occupy 8 positions.

As the frequency increases, the supported bandwidth also increases, and the subcarrier spacing employed correspondingly increases. Especially in the frequency band above 52.6GHz, the bandwidth is often above 1 GHz. In order to use a large bandwidth, the subcarrier spacing also needs to be increased accordingly, for example using subcarrier spacing of 240kHz or even 480 kHz. For the subcarrier spacing of 240kHz and 480kHz for higher frequencies, not only the usage in the licensed band but also the deployment in the unlicensed band need to be considered. According to frequency planning of various countries, a large number of continuous sub-authorized frequency bands exist in the 52.6-71 GHz frequency band.

The SSB design of the unlicensed band needs to consider the influence of Listen Before Transmit (LBT) procedure, and also needs to consider the continuous transmission of the SSB and associated system messages, specifically, the remaining minimum information (RMSI). The RMSI comprises resource indication (such as system uplink and downlink proportion) information of a system and is sent by a PDSCH carrying the RMSI; the size and location of the RMSI resources is also variable, indicated by the associated PDCCH.

Unless otherwise specified, the PDCCH in the present application refers to a PDCCH related to an SSB, and is also referred to as RMSI CORESET or CORESET 0; the PDSCH of the present application is the PDSCH for carrying RMSI, also denoted RMSI PDSCH.

Considering the effect of LBT, SSB, CORESET 0 and PDSCH carrying RMSI are transmitted continuously. Considering the LBT requirement for bandwidth, SSB and CORESET 0 need to be transmitted in a time-domain separated, frequency-domain overlapped manner. At the current subcarrier spacing of 240kHz, the SSB block transmission mode 5 cannot support continuous transmission of different SSBs in a frequency domain overlapping manner and associated CORESET 0 and RMSI time domains.

Meanwhile, the existing NR design does not fully consider the requirement of the high-band unlicensed spectrum. According to the current subcarrier spacing design of 240kHz, the single carrier supports a bandwidth less than 1 GHz. While usable frequency bandwidths above 52.6GHz are above 1GHz, requiring larger subcarrier spacings to be employed. When a larger subcarrier spacing is employed, the number of slots and symbols contained within a 5ms half frame is larger.

In all respects, there is also a need for improvements in how to transmit SSBs, associated CORESET 0 and RMSI in higher frequency unlicensed bands. The invention provides a technical scheme of high-frequency SSB, associated CORESET 0 and RMSI, and supports NR system high-frequency application.

Fig. 3 is a flow chart of an embodiment of a method of the present application.

The embodiment of the application provides a high-frequency discovery signal transmission method, which is used for an unauthorized frequency band of a 5G system and comprises the following steps:

step 101, determining the position of an SSB;

transmitting SSBs at 64 preselected locations within half a frame length; the 64 preselected locations are distributed within 32 time slots, each time slot containing 2 preselected locations;

Step 102, determining the SSB and the subcarrier interval of the associated PDCCH;

103, determining the position of PDCCH (CORESET 0) associated with the SSB;

the SSBs and the corresponding PDCCH subcarrier intervals are the same, in each time slot, the 1 st preselected position is located at the 2 nd to 5 th symbols, the 2 nd preselected position is located at the 6 th to 9 th symbols, or in each time slot, the 1 st preselected position is located at the 4 th to 7 th symbols, the 2 nd preselected position is located at the 8 th to 11 th symbols, the PDCCH information corresponding to the SSB of the 1 st preselected position is located at the 0 th symbol, the PDCCH information corresponding to the SSB of the 2 nd preselected position is located at the 1 st symbol, and the time domain length of each PDCCH information is 1 symbol.

The SSB has the same interval with the corresponding PDCCH subcarrier, and in another embodiment, when the 1 st preselected position is located at the 4 th to 7 th symbols and the 2 nd preselected position is located at the 8 th to 11 th symbols, the PDCCH information corresponding to the SSB of the 1 st preselected position is located at the 0 th to 1 st symbols, the PDCCH information corresponding to the SSB of the 2 nd preselected position is located at the 2 nd to 3 rd symbols, and the time domain length of each PDCCH information is 2 symbols.

When the PDCCH subcarrier spacing corresponding to the SSB is reduced, for example 1/2, the PDCCH corresponding to the SSB at the 1 st pre-selection position is located at the 0 th symbol or the 7 th symbol of the time slot where it (which refers to PDCCH) is located, the PDCCH information corresponding to the SSB at the 2 nd pre-selection position is located at the 2 nd symbol or the 8 th symbol of the time slot where it is located, and the time domain length of each PDCCH information is 1 symbol. To understand, it needs to be explained that, when the subcarrier spacing of the PDCCH is smaller than the subcarrier spacing of the SSB, the length of the time slot in which the PDCCH is located is larger than the length of the time slot in which the SSB is located, and the symbol length of the time slot in which the PDCCH is located is larger than the symbol length of the time slot in which the SSB is located. For example, when the PDCCH subcarrier spacing is 60kHz and the SSB subcarrier spacing is 120kHz, referring to the symbol position relationship of the time slots of different subcarrier spacings in fig. 2(a) - (b), the 0 th to 1 st symbols of the 1 st time slot where the SSB is located are the same as the 0 th symbol time domain position of the time slot where the PDCCH is located, and the 2 nd to 3 rd symbols of the 1 st time slot where the SSB is located are the same as the 1 st symbol time domain position of the time slot where the PDCCH is located; the 0 th to 1 st symbols of the 2 nd time slot where the SSB is located are the same as the 7 th symbol time domain position of the time slot where the PDCCH is located, and the 2 nd to 3 rd symbols of the 2 nd time slot where the SSB is located are the same as the 8 th symbol time domain position of the time slot where the PDCCH is located.

Step 104, determining indication information in the SSB, namely first information;

preferably, as the first information, at least one of the following information is contained in the SSB:

a subcarrier spacing of a PDCCH corresponding to the SSB; the multiplexing scheme of the SSB and the corresponding PDCCH (here, "multiplexing scheme" is shown in fig. 4); the frequency domain position difference (expressed as Offset in terms of the number of RBs) between the SSB and the corresponding PDCCH; a starting symbol of the PDCCH; the time domain length (number of symbols, expressed as PDCCH)

) (ii) a The number of resources (RB number, expressed as

)。

Step 105, determining the indication information, i.e. the second information, in the PDSCH.

And determining that a downlink channel indicated by the downlink control information corresponding to the SSB contains second information, wherein the second information is used for indicating whether the SSB is actually sent at the 1 st preselected position and the 2 nd preselected position.

According to steps 101-105, for example, the network device sends the SSB, associated RMSI CORESET and RMSI PDSCH after LBT is successful. The SSB sent, and the associated RMSI CORESET and RMSI PDSCH earliest start time, needs to be after LBT success, and cannot collide with LBT time. Wherein the sending position of the SSB is the preset time position given by the present invention. The SSB sent at the preset time position also comprises first information indicating RMSI CORESET configuration information associated with the SSB. RMSI CORESET gives RMSI PDSCH configuration information. RMSI PDSCH contains second information about which of the preset locations the SSB actually sent.

Fig. 4 is a schematic diagram of the multiplexing mode of SSB and CORESET 0.

The scheme of the application does not support a multiplexing mode III, namely time domain overlapping and frequency domain non-overlapping.

For further understanding, an example of SSB preset locations is given below.

In the data structure shown in the figures of the following embodiments, each square in the first horizontal bar represents a slot, and different numbers of slots are included in a half-frame duration (5m) because the slot durations are different under different subcarrier spacing conditions. In the second horizontal bar, the spread represents 14 characters in one time slot, i.e., 0-13 th characters, where the squares filled with gray scale represent the locations for SSB. The characters with light gray represent 1 st pre-selection positions, the characters with dark gray represent 2 nd pre-selection positions, and represent the serial number marked on the position of each character; the subcarrier spacing values are noted before the time slot.

Example 1

In this embodiment, the index of the first symbol of SSB is set to {2, 6} within one timeslot, and there is a predetermined position of SSB within 32 consecutive timeslots within a half frame. The 64 default positions of the SSB in a half frame can be expressed as {2, 6} +14n, where n is 0,1,2, … 32. The distribution of SSB default positions is shown in fig. 5(a) - (c), where fig. 5(a) is a 120kHz subcarrier spacing, and SSB default positions are {2, 6} +14n, where n is 0,1,2, … 32; fig. 5(b) a schematic diagram of a 240kHz subcarrier spacing with SSB preset position {2, 6} +14n, where n is 0,1,2, … 32; fig. 5(c) shows the 480kHz subcarrier spacing with SSB default position {2, 6} +14n, where n is 0,1,2, … 32.

Under such SSB configuration, the corresponding RMSI CORESET subcarrier spacing is the same as the subcarrier spacing employed by the SSB. The indication of the first information of the RMSI CORESET in the SSB is based on a predefined table, as shown in tables 1,2 and 3, wherein i is the number (0-63) of the SSB, and the table contains a series of information related to the RMSI CORESET for different subcarrier intervals. Table 1 needs to be indicated with 4 bits indicating a row in the table. Offset1-5 is the difference in the lowest position in the frequency domain between the different SSBs and the RMSI CORESET. After obtaining the multiplexing mode according to the information in table 1, it is further necessary to further obtain all the information related to the RMSI CORESET according to table 2 or table 3. The current standard requires 8 bits to indicate the first information. Tables 1 and 3 are designed separately according to the present invention and table 2 multiplexes the current standards.

TABLE 1 RMSI CORESET configuration for unlicensed band SSB, PDCCH sub-carrier spacing of 120, 120/240/480, 480kHz

Table 2, SSB and RMSI CORESET multiplexing mode one, PDCCH search space configuration associated with RMSI CORESET above 6GHz

In table 2, O and M are parameters for determining the slot number of the appearance of CORESET, and are specifically defined in 3GPP TS 38.213 v15.6.0.

Table 3, SSB and RMSI CORESET multiplexing mode two, PDCCH search space configuration associated with RMSI CORESET above 6GHz

Wherein the SFN is_cAnd n_cIs the frame number and time slot number, SFN, where CORESET 0 is located_SSB，iAnd n_SSB,iIs the frame number and slot number of the ith SSB.

RMSI PDSCH the second information is 64 bits in length and indicates whether SSBs are actually present at preselected locations of 64 SSBs.

Example 2

In this embodiment, the index of the first symbol of the SSB is set to {4, 8} in a timeslot, and there are predetermined positions of SSBs in 32 consecutive timeslots in a subframe. The 64 default positions of the SSB in a half frame can be expressed as {4, 8} +14n, where n is 0,1,2, … 32. As shown in fig. 6(a) - (c), fig. 6(a) illustrates a 120kHz subcarrier spacing, SSB preset position {4, 8} +14n, n is 0,1,2, … 32, fig. 6(b) illustrates a 240kHz subcarrier spacing, SSB preset position {4, 8} +14n, n is 0,1,2, … 32; fig. 6(c) shows the 480kHz subcarrier spacing, SSB default position {4, 8} +14n, where n is 0,1,2, … 32.

Under the SSB configuration, the RMSI CORESET subcarrier interval corresponding to the SSB with the subcarrier interval of 120kHz is also 120kHz, and the RMSI CORESET subcarrier interval corresponding to the SSB with the subcarrier interval of 240kHz and 480kHz can be 240kHz, 480kHz, or 120kHz and 480 kHz. The indication of the first information of the RMSI CORESET in the SSB is discussed separately based on predefined table requirements for different subcarrier spacings.

Table 1 and table 2 in example 1 can also be used to indicate the RMSI CORESET when the SSB corresponds to the same RMSI CORESET subcarrier spacing. The contents of table 3 are instead as shown in table 4. The first information contains bits still 8 bits.

TABLE 4 unlicensed band SSB, PDCCH sub-carrier spacing is 120, 120/240/480, 480kHz, SSB and RMSI CORESET multiplexing mode two, PDCCH search space allocation associated with RMSI CORESET above 6GHz

When the RMSI CORESET subcarrier spacing corresponding to the SSB is different, there are two cases: SSB subcarrier spacing 240kHz, RMSI CORESET subcarrier spacing 120 kHz; the SSB subcarriers are spaced 480kHz apart and the RMSI CORESET subcarriers are spaced 240kHz apart. Tables 1 and 2 in example 1 may still be used as an indication for RMSI CORESET. In the multiplexing mode two, the PDCCH search space parameters associated with the RMSI CORESET need to be configured according to table 5. The first information contains bits still 8 bits.

Table 5 shows that the unlicensed band { SSB, PDCCH } subcarrier spacing is {240,120}/{480, 240} } kHz, the SSB and RMSI CORESET multiplexing mode two, and PDCCH search space configuration associated with RMSI CORESET is above 6 GHz.

Wherein k is used to indicate 64 SSB indexes, and the 64 SSB indexes i are represented by 4k, 4k +1, 4k +2, and k +3, and k has 15 values.

The second message in RMSI PDSCH, which is 64 bits in length, indicates whether a preselected location of 64 SSBs actually sent an SSB.

Example 3

In this embodiment, the index of the SSB first symbol is set to {4, 8}, S is 8, and T is 2 in one timeslot. The 64 preset positions of the SSB in a half frame can be represented as {4, 8} +14n, n ═ 0,1,2, … 7,10,11,12 … 17,20,21,22,. 27,30,31,32, …, 37. For a subcarrier spacing of 120kHz, the distribution of preset positions of SSBs is shown in fig. 7, where fig. 7(a) is a schematic diagram of a subcarrier spacing of 120kHz, and a preset position of SSBs is {4, 8} +14n, where n is 0,1,2, … 7,10,11,12 … 17,20,21,22, ·,27,30,31,32, …, 37; fig. 7(b) is a schematic diagram of a 240kHz subcarrier spacing with SSB preset positions of {4, 8} +14n, n ═ 0,1,2, … 7,10,11,12 … 17,20,21,22, · 27,30,31,32, …, 37; fig. 7(c) is a diagram of a 480kHz subcarrier spacing with SSB preset positions of {4, 8} +14n, n ═ 0,1,2, … 7,10,11,12 … 17,20,21,22,.. multidot.27, 30,31,32, …, 37.

Under the SSB configuration, the RMSI CORESET subcarrier interval corresponding to the SSB with the subcarrier interval of 120kHz is also 120kHz, and the RMSI CORESET subcarrier interval corresponding to the SSB with the subcarrier interval of 240kHz and 480kHz can be 240kHz, 480kHz, or 120kHz and 480 kHz.

Similarly to the case of embodiment 2, when the RMSI CORESET subcarrier spacing corresponding to the SSB is the same, table 1, table 2 and table 4 in the embodiment can be used as an indication of RMSI CORESET. The first information contains bits still 8 bits.

When the RMSI CORESET subcarrier spacing corresponding to the SSB is different, there are two cases: SSB subcarrier spacing 240kHz, RMSI CORESET subcarrier spacing 120 kHz; the SSB subcarriers are spaced 480kHz apart and the RMSI CORESET subcarriers are spaced 240kHz apart. Table 1 and table 2 in the examples may still be used as an indication of RMSI CORESET. In the multiplexing mode two, the PDCCH search space parameters associated with the RMSI CORESET need to be configured according to table 5. The first information contains bits still 8 bits.

Example 4

In this embodiment, the index of the SSB first symbol is {2, 6}, S ═ 8, and T ═ 2 at a preset position in one slot. The 64 preset positions of the SSB in a half frame can be represented as {4, 8} +14n, n ═ 0,1,2, … 7,10,11,12 … 17,20,21,22,. 27,30,31,32, …, 37. For a subcarrier spacing of 120kHz, the distribution of preset positions of SSBs is shown in fig. 8, where fig. 8(a) represents the subcarrier spacing of 120kHz, and the preset positions of SSBs are {2, 6} +14n, where n is 0,1,2, … 7,10,11,12 … 17,20,21,22,. once, 27,30,31,32, …, 37; fig. 8(b) shows a 240kHz subcarrier spacing with SSB preset positions of {2, 6} +14n, where n is 0,1,2, … 7,10,11,12 … 17,20,21,22, · 27,30,31,32, …, 37; fig. 8(c) shows a 240kHz subcarrier spacing, and the SSB preset position is {2, 6} +14n, where n is 0,1,2, … 7,10,11,12 … 17,20,21,22, · 27,30,31,32, …, 37. Under such SSB configuration, the corresponding RMSI CORESET subcarrier spacing is the same as the subcarrier spacing employed by the SSB. The indication of the first information of the RMSI CORESET in the SSB is based on a predefined table for different subcarrier spacings, which may be indicated using table 1, table 2 and table 3, similar to that in embodiment 1. 8 bits are required to indicate the first information.

Fig. 9 is a flowchart of an embodiment of a method of the present application for a network device.

Step 201, the network device performs LBT;

the LBT referred to in this application includes different LBT modalities. Specifically, Cat2 LBT (LBT grade 2) and Cat4 LBT (LBT grade 4) are most commonly used. Cat2 LBT listens to the current channel once 16/25us before sending data. The Cat4 LBT performs two-part interception before sending data, the first part is a single interception and the second part is a circulating multiple interception, and the specific process can refer to the current standard, such as 3GPP TR 37.213.

Step 202, the network device determines a preselected location of the SSB;

the method comprises the steps that after the network equipment passes through LBT, a synchronous signal/physical broadcast block (SSB) is sent, the SSB has a plurality of preset time positions in a 'half frame', and the actual sending time position of the SSB is the preset time position; for a half frame containing SSB, the index of the SSB first symbol is {2, 6} or {4, 8} in a preset position in a slot, and the index of the symbol in the slot is numbered from 0; the number of the time slots containing the SSB is L-32, and the L time slots may be 32 continuous time slots in a half frame, or S time slots are used as one group, and each group is separated by T time slots;

the 64 preset positions of the SSB may be denoted as {2, 6} +14n, or {4, 8} +14n, n ═ 0,1,2,3, … 31; when L is set of S slots, and each set is spaced by T slots, the 64 preset positions of the SSB in a half frame can be expressed as {2, 6} +14n, or {4, 8} +14n, where n is 0,1, …, S-1, S + T-1, …,2S + T-1, …, kS + (k-1) T-1, …,32+ (k-1) T, where L is S slots, where T is the interval between each set

。

Step 203, the network equipment determines the preselected position of the PDCCH;

after passing through LBT, the network equipment sends RMSI CORESET corresponding to the SSB, and the actual time position of the RMSI CORESET is related to the actual time position of the SSB; when the 64 preset positions of the SSBs in a half frame can be expressed as {2, 6} +14n, the RMSI CORESET of two SSBs in the same timeslot and the two SSBs are in the same timeslot and located in the first two symbols of the timeslot respectively, and each RMSI CORESET has a time-domain length of {2, 6} +14n

Is 1; the SSB and the RMSI CORESET employ the same subcarrier spacing.

After passing through LBT, the network equipment sends RMSI CORESET corresponding to the SSB, and the actual time position of the RMSI CORESET is related to the actual time position of the SSB; when 64 preset positions of the SSBs in a half frame can be expressed as {4, 8} +14n, the RMSI CORESET of two SSBs in the same time slot and the two SSBs are in the same time slot and have the same subcarrier spacing, the RMSI CORESET is respectively located in the first two symbols or the first four symbols of the time slot, and the time-domain length of each RMSICORESET is equal to that of each SSB

Is 1 or 2.

After passing through LBT, the network equipment sends RMSI CORESET corresponding to the SSB, and the actual time position of the RMSI CORESET is related to the actual time position of the SSB; when 64 preset positions of the SSBs in a half frame can be expressed as {4, 8} +14n, RMSI CORESET of two SSBs in the same time slot and the two SSBs are in the same time slot, but when the RMSI CORESET subcarrier spacing is smaller than the RMSI CORESET spacing, the RMSI CORESET is respectively located at 0,1, 7, and 8 symbols of the time slot where the RMSI CORESET is located, and each RMSI CORESET time domain length is equal to or less than the RMSI CORESET time domain length

Is 1.

The first multiplexing mode is that the SSB is not overlapped with the RMSI CORESET in time and frequency, and the second multiplexing mode is that the SSB is not overlapped with the RMSI CORESET in time and frequency, and the frequency domain is not overlapped.

Step 204, the network device sends an SSB including information indicating the location of the PDCCH;

the SSB contains first information related to the RMSI CORESET; the first information contains at least one of the following information: the subcarrier interval adopted by the RMSI CORESET, the multiplexing mode of the RMSI CORESET and the SSB, the starting symbol of the RMSI CORESET, and the time domain length of the RMSI CORESET

Number of resources occupied by frequency domain of RMSI CORESET

The frequency domain lowest position difference between the SSB and RMSI CORESET.

Step 205, the network device sends the PDSCH including information indicating whether the predetermined location of the SSB is valid.

RMSI PDSCH indicated by the RMSI CORESET associated with the SSB contains second information; the second information indicates at which preset locations the network device actually sends the SSBs.

Fig. 10 is a flowchart of an embodiment of a method of the present application for a terminal device.

Step 301, the terminal device receives the SSB at a predetermined location;

the terminal equipment receives the SSB, the actual time position for receiving the SSB is a preset time position, for a half frame containing the SSB, the preset position of the index of the first symbol of the SSB in one time slot is {2, 6} or {4, 8}, and the index of the symbol in one time slot starts numbering from 0; the number of the slots containing the SSB is L-32, and the L slots may be 32 consecutive slots in a half frame, or S slots are used as a group, and each group is separated by T slots. .

The terminal equipment receives the SSB subcarrier with the interval of 120kHZ, 240kHz or 480 kHz; when L is 32 consecutive slots, 64 predetermined positions of the SSB in a field can be representedIs {2, 6} +14n, or {4, 8} +14n, n is 0,1,2,3, … 31; when L is set of S slots, and each set is spaced by T slots, the 64 preset positions of the SSB in a half frame can be expressed as {2, 6} +14n, or {4, 8} +14n, where n is 0,1, …, S-1, S + T-1, …,2S + T-1, …, kS + (k-1) T-1, …,32+ (k-1) T, where L is S slots, where T is the interval between each set

。

Step 302, the terminal equipment receives the PDCCH at the position indicated by the SSB;

after receiving the SSB, the terminal equipment receives RMSI CORESET corresponding to the SSB according to the first information in the SSB; the corresponding RMSI CORESET and the SSB are in the same time slot or delay a plurality of time slots for the SSB.

Step 303, the terminal equipment determines whether the predetermined position of the SSB is valid according to the instruction of the PDSCH;

after receiving the SSB and the corresponding RMSI CORESET, the terminal demodulates the corresponding RMSI PDSCH according to the RMSI CORESET instruction to obtain the second information; and the terminal obtains the preset positions where the network equipment actually sends the SSB according to the second information.

Fig. 11 is a schematic diagram of an embodiment of a network device.

An embodiment of the present application further provides a network device, which uses the method according to any of the embodiments of the present application, and a network device, which is used in the method according to any of the embodiments of the first aspect of the present application. The network equipment performs LBT, determines a preselected position of an SSB, determines a preselected position of a PDCCH, and transmits the SSB and the PDCCH and the PDSCH corresponding to the SSB.

In order to implement the foregoing technical solution, the network device 400 provided in the present application includes a network sending module 401, a network determining module 402, and a network receiving module 403.

The network sending module is used for sending the SSB after the LBT passes, and the network sending module is also used for sending the RMSI CORESET corresponding to the SSB after the LBT passes, wherein the SSB carries first information corresponding to the RMSI CORESET; further, the network sending module is further configured to send RMSI PDSCH corresponding to the SSB, wherein RMSI PDSCH carries the second information related to the SSB.

The network determining module is configured to determine a plurality of preset time positions of the SSB in a half frame, where an actual sending time position of the SSB is a preset time position; for a half frame containing SSB, the index of the SSB first symbol is {2, 6} or {4, 8} in a preset position in a slot, and the index of the symbol in the slot is numbered from 0; the number of the slots containing the SSB is L-32, and the L slots may be 32 consecutive slots in a half frame, or S slots are used as a group, and each group is separated by T slots.

And the network receiving module is used for receiving uplink data or uplink signaling.

The specific method for implementing the functions of the network sending module, the network determining module, and the network receiving module is described in the embodiments of the methods shown in fig. 1 to 10, and will not be described herein again.

Fig. 12 is a schematic diagram of an embodiment of a terminal device.

The present application further provides a terminal device, which uses the method according to any of the embodiments of the present application, for the method according to any of the embodiments of the first aspect of the present application. And the terminal equipment receives the SSB and the PDCCH and PDSCH information corresponding to the SSB.

In order to implement the foregoing technical solution, the terminal device 500 provided in the present application includes a terminal sending module 501, a terminal determining module 502, and a terminal receiving module 503. The terminal receiving module is configured to receive an SSB, and further, the terminal receiving module also receives an RMSI CORESET corresponding to the SSB; the corresponding RMSI CORESET and the SSB are in the same time slot or delay a plurality of time slots for the SSB; the terminal receiving module also receives RMSI PDSCH, RMSI PDSCH corresponding to RMSI CORESET, wherein the RMSI PDSCH, RMSI PDSCH comprises the second information.

The terminal determining module is configured to determine that an actual time position for receiving the SSB is a preset time position, and for a half frame including the SSB, a preset position of an index of a first symbol of the SSB in one slot is {2, 6} or {4, 8}, and a symbol index in one slot starts numbering from 0; the number of the slots containing the SSB is L-32, and the L slots may be 32 consecutive slots in a half frame, or S slots are used as a group, and each group is separated by T slots.

And the terminal sending module is used for sending uplink data or uplink signaling.

The specific method for implementing the functions of the terminal sending module, the terminal determining module and the terminal receiving module is described in the embodiments of the methods shown in fig. 1 to 10 of the present application, and is not described herein again.

The terminal equipment can be mobile terminal equipment.

Fig. 13 is a schematic structural diagram of a network device according to another embodiment of the present invention. The network device 600 comprises a processor 601, a wireless interface 602, a memory 603. Wherein the wireless interface may be a plurality of components, i.e. including a transmitter and a receiver, providing means for communicating with various other apparatus over a transmission medium. The wireless interface implements a communication function with the terminal device, and processes wireless signals through the receiving and transmitting devices, and data carried by the signals are communicated with the memory or the processor through the internal bus structure. The memory 603 contains a computer program for executing any of the embodiments of fig. 1 to 10 of the present application, and the computer program runs or changes on the processor 601. When the memory, processor, wireless interface circuit are connected through a bus system. The bus system includes a data bus, a power bus, a control bus, and a status signal bus, which are not described herein.

Fig. 14 is a block diagram of a terminal device of another embodiment of the present invention. The terminal device 700 shown in the figure comprises at least one processor 701, a memory 702, a user interface 703 and at least one network interface 704. The various components in the terminal device 700 are coupled together by a bus system. A bus system is used to enable connection communication between these components. The bus system includes a data bus, a power bus, a control bus, and a status signal bus.

The user interface 703 may include a display, a keyboard, or a pointing device, such as a mouse, a trackball, a touch pad, or a touch screen, among others.

The memory 702 stores executable modules or data structures. The memory may have stored therein an operating system and an application program. The operating system includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application programs include various application programs such as a media player, a browser, and the like for implementing various application services.

In the embodiment of the present invention, the memory 702 contains a computer program for executing any one of the embodiments of fig. 1 to 10 of the present application, and the computer program runs or changes on the processor 701.

The memory 702 contains a computer readable storage medium, and the processor 701 reads the information in the memory 702 and combines the hardware to complete the steps of the above-described method. In particular, the computer-readable storage medium has stored thereon a computer program, which when executed by the processor 701 implements the steps of the method embodiment as described above with reference to any one of the embodiments of fig. 1 to 4.

The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the method of the present application may be implemented by hardware integrated logic circuits in the processor 701 or by instructions in the form of software. The processor 701 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, an off-the-shelf programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. In a typical configuration, the device of the present application includes one or more processors (CPUs), an input/output user interface, a network interface, and a memory.

Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application therefore also proposes a computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of the embodiments of the present application. For example, the

memory

603, 702 of the present invention may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (FLASH RAM).

Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include transitory computer readable media such as modulated data signals and carrier waves.

Based on the embodiments of fig. 1 to 14, the present application further provides a mobile communication system, which includes at least 1 embodiment of any terminal device in the present application and/or at least 1 embodiment of any network device in the present application.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A high frequency discovery signal transmission method is used for an unlicensed frequency band of a 5G system,

transmitting SSBs at 64 preselected locations within half a frame length;

each time slot includes 14 symbols counted as 0-13 th symbols,

in each time slot, the 1 st preselected position is located at the 2 nd to 5 th symbols, and the 2 nd preselected position is located at the 6 th to 9 th symbols;

alternatively, the first and second electrodes may be,

in each time slot, the 1 st pre-selection position is located at the 4 th to 7 th symbols, and the 2 nd pre-selection position is located at the 8 th to 11 th symbols.

2. The method of claim 1,

the 32 time slots are consecutive, or,

the 32 time slots are divided into a plurality of groups of time slots with the same interval time slot, the number of the time slots of each group of time slots is the same, and the time slots in each group are continuous.

3. The method of claim 1,

the SSBs are transmitted at subcarrier spacings of 120kHz, 240kHz, or 480 kHz.

4. The method of claim 1,

the SSB has the same interval with the corresponding PDCCH subcarrier;

the PDCCH information corresponding to the SSB of the 1 st pre-selected location is located at the 0 th symbol, the PDCCH information corresponding to the SSB of the 2 nd pre-selected location is located at the 1 st symbol, and the time domain length of each PDCCH information is 1 symbol.

5. The method of claim 1,

the SSBs and the corresponding PDCCH subcarrier intervals are the same, the PDCCH information corresponding to the SSB at the 1 st preselected position is located at the 0 th to 1 st symbols, the PDCCH information corresponding to the SSB at the 2 nd preselected position is located at the 2 nd to 3 rd symbols, and the time domain length of each PDCCH information is 2 symbols.

6. The method of claim 1,

the PDCCH subcarrier interval corresponding to the SSB is reduced, the PDCCH information corresponding to the SSB at the 1 st preselected position is located at the 0 th symbol or the 7 th symbol of the time slot where the PDCCH information is located, the PDCCH information corresponding to the SSB at the 2 nd preselected position is located at the 2 nd symbol or the 8 th symbol of the time slot where the PDCCH information is located, and the time domain length of each PDCCH information is 1 symbol.

7. The method of claim 1,

the multiplexing mode of the SSB and the corresponding PDCCH is as follows:

the time domain and the frequency domain are not overlapped, or the time domain and the frequency domain are not overlapped.

8. The method of claim 1,

the SSB comprises at least one of the following information:

a subcarrier spacing of a PDCCH corresponding to the SSB;

a multiplexing mode of the SSB and the corresponding PDCCH;

a frequency domain position difference between the SSB and the corresponding PDCCH;

a start symbol of downlink control information;

the time domain length of the downlink control information;

and the frequency domain of the downlink control information occupies the resource number.

9. The method of claim 1,

the downlink channel indicated by the downlink control information corresponding to the SSB includes information indicating whether the 1 st preselected location and the 2 nd preselected location are actually transmitted.

10. A network device for use in the method of any one of claims 1 to 9,

and the network equipment sends the SSB and the PDCCH information corresponding to the SSB.

11. A network device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method according to any one of claims 1 to 9.

12. A terminal device for use in the method of any one of claims 1 to 9,

and the terminal equipment receives the SSB and the PDCCH information corresponding to the SSB.

13. A terminal device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method according to any one of claims 1 to 9.

14. A mobile communication system comprising at least one network device according to any of claims 10 to 11 and at least one terminal device according to any of claims 12 to 13.

15. A computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 9.