CN111669239B

CN111669239B - Method, device and system for supporting directional listen-before-send transmission

Info

Publication number: CN111669239B
Application number: CN202010415309.2A
Authority: CN
Inventors: 刘晓峰; 魏贵明; 杜滢; 闫志宇; 焦慧颖; 沈霞; 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: 2022-09-09
Anticipated expiration: 2040-05-15
Also published as: CN111669239A

Abstract

The application discloses a directional listen-before-send supporting transmission method for an unlicensed frequency band of a 5G system, which comprises the steps of associating N directions of LBT with Q directions of SSB, enabling Q to be larger than or equal to N, and enabling at least one SSB direction to be covered in any LBT direction. The application also comprises network equipment, terminal equipment and a system applying the method. The method and the device solve the problem that the existing system is low in access efficiency in the high-frequency-band unlicensed spectrum. 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.

Description

Method, device and system for supporting directional listen-before-send transmission

Technical Field

The present application relates to the field of mobile communications technologies, and in particular, to a method, device, and system for supporting directional listen-before-send transmission.

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.

The frequency bands above 52.6GHz are wider than the lower frequency bands, and a large number of unlicensed frequency bands exist. For unlicensed spectrum usage, Listen Before Talk (LBT) and synchronization signal broadcast data block (SS/PBCH block, SSB) transmission are also required. The transmission of high frequency signals tends to be via more antennas and thus more directional. For the characteristic of strong directivity of high-frequency signals, the directional LBT needs to be considered correspondingly. The invention provides a method, equipment and a system with directional LBT, which can carry out system access in a high-frequency unauthorized frequency band with high efficiency.

Disclosure of Invention

The application provides a method, equipment and a system for supporting directional listen-before-send transmission, and solves the problem that an existing system is low in access efficiency in a high-frequency-band unlicensed spectrum. 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 directional listen-before-send supporting transmission method, which is used in a 5G system, and associates N directions of LBT with Q directions of SSB, so that Q is greater than or equal to N, and covers at least one SSB direction in any LBT direction.

Further, within a set duration, a plurality of preset time domain symbol positions of the SSB are divided into Q groups, and are transmitted in a set order in Q directions.

Preferably, the direction of each 1 LBT covers the direction of 1 SSB.

Preferably, in any 1 LBT direction covering k SSB directions, the listening threshold is k/Q times of the omni-directional LBT listening threshold.

Preferably, any 1 LBT procedure, uses all or at least a part of the N directions.

Preferably, at least 2 LBT procedures use different ones, or at least a part of the same, of said N directions.

Preferably, in the direction in which LBT process monitoring is successful, the covered SSBs sequentially send the SSBs of the corresponding preset time domain symbol positions according to a set order.

Preferably, after monitoring in all LBT directions is successful, an SSB is sent; or, after monitoring successfully in a part of LBT directions, sending an SSB, and abandoning the SSB at the preset time domain symbol position corresponding to the SSB direction covered in the LBT direction that is not monitored successfully. At this time, further, the abandoned SSB causes the discontinuity to exceed the set interval duration, and the SSB of the preset time domain symbol position corresponding to the subsequent SSB direction is abandoned.

In a second aspect, an embodiment of the present application further provides a network device, configured to associate N LBT directions with Q SSBs, so that Q ≧ N and at least one SSB direction is covered in any LBT direction; implementing an LBT procedure in at least 1 or all LBT directions; and in the LBT direction with successful monitoring, the covered SSB direction sequentially sends the corresponding SSB with the preset time domain symbol position according to the set sequence.

Preferably, the present application further proposes a network device, comprising: 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 third aspect, the present application further provides a terminal device, configured to implement the method in any one of the embodiments of the first aspect of the present application. And the terminal equipment receives the SSB at a preset time domain symbol position.

Preferably, the present application also provides 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 invention combines the SSB of NR and the related system information transmission and directional LBT. The signal transmission method, the device and the communication system provided by the invention can support the LBT transmission of the SSB and the related system information based on the directivity, so that the whole system has higher recognition degree on the directivity interference. Meanwhile, the invention also supports adjusting the directionality of each LBT according to each LBT result and the sent information condition, thereby further improving the flexibility of the system LBT and effectively improving the access efficiency of the whole system.

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

fig. 3 is a flowchart of an embodiment of the method of the present application for a network device and a terminal device;

fig. 4 is a schematic diagram of the LBT direction being the same as the SSB direction (N-Q-8);

FIG. 5 is a schematic diagram of the continuous SSB and related information transmission;

fig. 6 is a schematic diagram of an LBT direction including 2 SSB directions (N ═ Q/2 ═ 4);

FIG. 7 is a diagram illustrating a network device supporting more SSBs and corresponding LBT directions;

FIG. 8 illustrates an example of changing the corresponding relationship between LBT and SSB according to the interference source;

FIG. 9 is a diagram of an embodiment of a network device;

FIG. 10 is a schematic diagram of an embodiment of a terminal device;

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

fig. 12 is a block diagram of a terminal device of another embodiment of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all 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 diagram illustrating 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 device includes a network data unit and a network 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 an uplink 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 symbol, 14 symbolsThe number constitutes one time slot. A time slot of length 1/2 ^K And ms, wherein K is a positive integer and corresponds to different subcarrier intervals, for example, when K is 0,1,2,3, and 4, the corresponding subcarrier intervals are 15kHz, 30kHz, 60kHz, 120kHz, and 240 kHz.

In the current standard, LBT is required for access to an unlicensed frequency band. LBT also has multiple classes depending on the content of the transmission. Three LBT procedures are typical for the comparison, called CAT1 LBT (LBT grade 1), CAT2 LBT (LBT grade 2) and CAT4 LBT (LBT grade 4), respectively. Different LBT classes correspond to LBT regulatory rules in different countries and regions.

In actual data transmission, different data types and physical channels are different, and different LBT levels can be adopted according to the supervision rules. CAT2 LBT may be used to send Discovery Signal (DRS). Where DRS is defined as a continuously transmitted data block of SSB and associated CSI-RS, CORESET 0, PDSCH(s). Wherein, the set 0 is a Control channel resource set (core) for carrying Remaining Minimum System Information (RMSI), and the PDSCH is used for carrying RMSI. When the DRS is sent independently or jointly with the system message, CAT2 LBT is adopted when the sending period is less than 20 times per second and the sending length is less than 1 ms. The CAT2 LBT may also be used for data transmission in an uplink or downlink initiated data structure, and when in use, it is required to meet the requirement that the uplink and downlink transmission conversion time is within a certain range. For other uplink or downlink initial data or signal transmission in a continuous transmission, the method is based on CAT4 LBT. CAT1 LBT is mainly used for intervals within 16us in data transmission.

Current LBT schemes are all based on omni-directional LBT. That is, no matter the LBT of the terminal and the base station does not distinguish the interference direction, the interference in all directions is intercepted, and the uniform interference threshold judgment is performed according to the accumulation of all the interference. In the high frequency band, the path loss of the signal is larger, and more antennas are required to be used for transmitting the signal, so that the high frequency signal transmission has stronger directivity. Omni-directional LBT cannot make good use of this characteristic, so that data transmission cannot be performed even if the transmission signal direction and the interference direction are different. In order to make good use of the characteristic that high frequency signals have strong directivity, it is necessary to design an LBT scheme with directivity for high frequencies. The invention provides a directional LBT method, equipment and a system in a high frequency band, which can well carry out high-efficiency data transmission in a high frequency and unauthorized frequency band.

Fig. 2 is a flow chart of an embodiment of the method of the present application.

The LBT referred to in this application includes different LBT modalities. Specifically, Cat2 LBT and CAT4 LBT are most commonly used. CAT2 LBT carries out 16/25us interception on the current channel before sending data, and CAT4 LBT carries out two parts of interception before sending data, wherein the first part is determined single interception, and the second part is circulating multiple interception. The invention aims at SSB and related system message sending, and mainly relates to the design of CAT2 LBT. The specific procedures may refer to an existing standard, such as 3GPP TR 37.213.

The embodiment of the application provides a directional transmission method after listening, which is used for a 5G system and comprises the following steps:

step 101, associating the LBT direction with the SSB direction;

the N directions of the LBT are associated with the Q directions of the SSB, so that Q is more than or equal to N and covers at least one direction of the SSB in any direction of the LBT.

Preferably, the direction of each 1 LBT covers the direction of 1 SSB. For example, the directions of 4 LBTs are respectively denoted as LBT direction 1, LBT direction 2, LBT direction 3, LBT direction 4, and the directions of 4 SSBs are respectively SSB direction 1, SSB direction 2, SSB direction 3, SSB direction 4, and the directions of 4 LBTs correspond to the directions of 4 SSBs one by one.

In examples 1 to 3, the direction of SSB is represented as SSB N (N is the number of directions).

It should be noted that the present invention can be used for various SSB pattern designs. At present, 5 SS/PBCH block designs are supported in the standard, and two SSB pattern designs are supported in a frequency band above 6 GHz. To better support unlicensed spectrum access above 52.6GHz, more SSB design designs may be introduced in the future. The present invention relates only to the directionality of the SSBs and related system information to be transmitted, and the use of the present invention is not affected by the pattern design of more SSBs.

Step 102, determining a monitoring threshold in an LBT direction;

according to the LBT directivity division, the LBT threshold needs to be adjusted, for example, the monitoring threshold in CAT2 LBT may be affected, and the corresponding adjustment needs to be performed in the threshold calculation formula.

103, carrying out 1 or more LBT processes in partial or all directions;

preferably, any 1 LBT procedure, uses all or at least a portion of the N directions.

Step 104, sending SSB after LBT process monitoring is successful;

within a set time length, a plurality of preset time domain symbol positions of the SSB are divided into Q groups and are sent in a set order in Q directions.

It should be noted that the set time length here is, for example, no more than half of the frame length. In the current standard, each 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 example, SSBs are transmitted in 32 consecutive or grouped consecutive slots, with two SSBs being included in 14 symbols in each slot. For example, a standard approach, applicable to 120kHz subcarrier spacing, the predetermined time domain symbol position is defined by the number of SSB start symbols as: {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 predetermined time domain symbol position of the SSB may be predetermined in a standard manner or a customized manner, and the manner of the predetermined time domain symbol position is not further limited herein.

Here, 64 SSBs are denoted as SSBs _i And i is 1 to 64. (where i is the index of the SSB sequence in time domain order)

Note that, the setting order here means that the operation order of Q SSB directions is set in advance. For example, if Q is 4, the directions 1,2,3, and 4 are given. The set order refers to a predefined order, which may be an increasing order, a decreasing order, or any other defined order, such as 3-1-2-4. Since the N directions of LBT are associated with the Q directions of SSB, that is, the working order of the N LBT directions for sending SSB is preset; therefore, it can also be said that a plurality of predetermined time domain symbol positions of the SSB are divided into Q groups and transmitted in a predetermined order in the N LBT directions.

Further, for example, SSB ₁ ～SSB ₆₄ Divided into 4 groups, 1 st SSB ₁ ～SSB ₁₆ Group 2 SSB ₁₇ ～SSB ₃₂ Group 3 SSB ₃₃ ～SSB ₄₈ Group 4 SSB ₄₉ ～SSB ₆₄ Each group transmitting in one SSB direction, the first SSB direction, e.g. SSB direction 3, transmitting the 1 st group SSB ₁ ～SSB ₁₆ (ii) a The SSB direction of the second transmission, e.g. SSB direction 1, the 2 nd group SSB ₁₇ ～SSB ₃₂ (ii) a The retransmitted SSB direction, e.g., SSB direction 2, transmits group 3 SSB ₃₃ ～SSB ₄₈ (ii) a The last SSB direction sent, e.g., SSB direction 4, sends the 4 th set of SSBs ₄₉ ～SSB ₆₄ 。

And in the direction of successful monitoring in the LBT process, the covered SSB direction sequentially sends the SSBs of the corresponding preset time domain symbol positions according to a set sequence. In addition to the above example, if N is 4, for example, the LBT direction in which the monitoring is successful is LBT direction 1, LBT direction 3, and LBT direction 4, and the SSB direction corresponds to SSB1, SSB 3, and SSB 4, then the SSB 2 should send SSB, that is, SSB in group 3, according to the set order of SSB direction 3-1-2-4 ₃₃ ～SSB ₄₈ Will be discarded.

Preferably, after monitoring in all LBT directions is successful, an SSB is sent; or, after monitoring successfully, a part of LBT directions send SSBs, that is, SSBs can only be sent in the SSBs covered by the LBT directions that are monitored successfully; and discarding the SSB of the preset time domain symbol position corresponding to the SSB direction covered in the LBT direction with unsuccessful monitoring. At this time, further, the abandoned SSB causes the discontinuity to exceed the set interval duration, and the SSB of the preset time domain symbol position corresponding to the subsequent SSB direction is abandoned.

The set interval duration may be, for example, 16us, and if the interval duration exceeds 16us due to the abandonment of sending the 3 rd set SSB, the subsequent 4 th set SSB in the SSB direction 4 is abandoned.

Fig. 3 is a flowchart of an embodiment of the method of the present application, applied to a network device and a terminal device.

Step 201, the network device determines a binding relationship between an LBT direction and an SSB direction;

the network equipment is used for associating N directions of LBT with Q directions of SSB, so that Q is larger than or equal to N and covers at least one direction of SSB in any LBT direction; the directional selection of the directional LBT is associated with the directionality of the SSB, this correlation being realized in that one direction of the directional LBT corresponds to a subset of the overall directions of the SSB;

assuming that possible directivities of the SSB are Q, the number of the LBT directions with the directivities is N, and Q is larger than or equal to N; further, a specific example is that one direction of the directional LBT corresponds to one direction of the SSB, i.e. N ═ Q.

Step 202, the network device determines the monitoring threshold of each direction of the LBT;

after the corresponding relationship between the LBT direction with directivity and the SSB direction is determined, according to the corresponding relationship, an LBT monitoring threshold of each LBT direction is determined, and the specific method is as follows: assuming that one direction of the directional LBT contains k possible directions of the SSB, then relative to the omni-directional LBT, the LBT listening threshold performed in that direction is adjusted based on k/Q; for example: the SSB has 8 directions, and the LBT directions correspond to the SSB directions one to one, so that the LBT listening threshold of each LBT direction may be 1/8 of the omni-directional LBT listening threshold.

Step 203, the network device determines the LBT direction included in the LBT process to be performed;

implementing the LBT procedure in at least 1 or all LBT directions; when the network device performs directional LBT for a time, it may select all directions or a subset of the directional LBT;

when the network device performs the directional LBT, the directionality contained in each LBT may be different;

examples are: if the network device performs the first LBT, there are 8 LBT directions, but the monitoring of 5 LBT directions is unsuccessful, the network device sends signals in 3 successful directions, and only selects the unsuccessful 5 LBT directions for sending in the next directional LBT;

step 204, the network device performs an LBT process in the determined direction to obtain an LBT result in each direction;

step 205, the network device determines the SSB and the related system message to be sent according to the LBT result;

and in the LBT direction with successful monitoring, the covered SSB direction sequentially sends the corresponding SSB with the preset time domain symbol position according to the set sequence.

The method comprises the steps that after the network equipment passes through directional LBT, the 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;

after listening according to the previous steps, some directions may be successful and some directions are not. Only in the direction in which LBT succeeds is it possible to send the corresponding SSB. There are two ways to determine the sending of specific SSBs and related system information:

the first method is as follows: the network equipment sends the signal containing the SSB only when the monitoring is successful in all the LBT directions for monitoring

The second method comprises the following steps: the network equipment sends the SSB signal in the LBT direction which is monitored successfully; further, when the LBT of the signal including the SSB sent by the network device is unsuccessful in a partial direction, so that the signal is discontinuous in time, and the intermediate interval exceeds a certain interval, such as 16us, then the SSB signal to be sent needs to be LBT again after the interval.

Step 206, the terminal device receives the SSB and the related system message at the preset time domain symbol position.

And the terminal equipment receives the SS/PBCH block at the preset time position (i.e. the time domain symbol position), and if the SSB is successfully received at the preset position, the LBT of the network equipment in the SSB direction is indicated to be successful.

The scheme provided by the invention can be flexibly used when different SSB designs and system deployments are faced, and the scheme provided by the invention is explained in detail through a plurality of embodiments.

Example 1:

fig. 4 is a schematic diagram of the LBT direction being the same as the SSB direction (N ═ Q ═ 8). In the present embodiment, one direction of the LBT having directivity (the pattern indicated by the solid line) corresponds to one direction of the SSB (the pattern indicated by the broken line), and N is Q. Fig. 4 shows an example of N ═ Q ═ 8, where SS/PBCH block is abbreviated SSB. The network device is also divided into 8 LBT directions according to the SSB, and the LBT threshold value in each direction may be set to 1/8 corresponding to omni-directional LBT, i.e. reduced by 9 dB. When the network device transmits the SSB and system information including all 8 directions at a time, LBT is performed for all directions.

When the network device monitors that there is interference above the threshold in the LBT direction, it may be determined that the LBT direction cannot perform corresponding SSB and data transmission, such as the LBT direction 8 in fig. 4. There are various options for the network device at this time:

selecting one of the following steps: no transmission is made and directional LBT continues. At this time, the network device may perform directional LBT again in a variety of ways, including but not limited to: LBT is carried out in 8 directions; performing LBT only in the direction of LBT success; and adjusting the SSB and the system information to be sent, and selecting the direction of the SSB to be sent for LBT. After performing directional LBT, the network device may determine whether to continue LBT or enter option two.

Selecting two: and sending the SSB and the related system information in the LBT success direction. The information to be transmitted at this time cannot include the information in the direction of unsuccessful listening. Fig. 5 is a schematic diagram of sending consecutive SSBs and related information, and if the SSBs related information that needs to be sent is consecutive in time, as shown in fig. 5, when SSB 8 cannot be sent, only the first 7 SSBs related information are sent. If some SSBs, such as the LBT in the SSB 4 direction, are unsuccessful and the break time caused by the SSB 4 failing to transmit exceeds a certain value, such as 16us, then only SSBs 1-3 can be transmitted, and the SSB 4 and subsequent SSBs need to perform the LBT process again. If SSB1 is unsuccessful, LBT needs to be performed again under the structure of fig. 5, and all SSBs cannot transmit.

Example 2:

fig. 6 is a schematic diagram of an LBT direction including 2 SSB directions (N ═ Q/2 ═ 4). In this embodiment, one direction of the directional LBT corresponds to 2 directions of the SSB, and N is Q/2. Fig. 6 shows an example of N-Q/2-4. The network device is divided into 4 LBT directions according to the SSB, and the LBT threshold value in each direction may be set to 1/4 corresponding to omni-directional LBT, i.e. reduced by 6 dB. When the network device sends the SSB and system information including all 8 directions once, LBT is performed for all directions.

When the network device monitors that there is interference above the threshold in the LBT direction, it may be determined that the LBT direction cannot perform corresponding SSB and data transmission, such as LBT direction 4 in fig. 6, corresponding SSB 7 and SSB 8. There are various options for the network device at this time:

selecting one of the following steps: no transmission is made and directional LBT continues. At this time, the network device performs directional LBT again in various ways, including but not limited to: then LBT is carried out in 4 directions; performing LBT only in the direction of LBT success; and adjusting the SSB and the system information to be sent, and selecting the direction of the SSB to be sent for LBT. After performing directional LBT, the network device may determine whether to continue LBT or enter option two.

Selecting two: and sending the SSB and the related system information in the LBT success direction. The information to be transmitted at this time cannot include information in the direction in which the listening was unsuccessful. If the SSB related information that needs to be transmitted is continuous in time, as shown in fig. 6, SSB 7 and SSB 8 cannot transmit at this time. Similarly to the case of embodiment 1, if part of SSBs, such as LBT in the direction of LBT 2, are unsuccessful and the break time caused by the inability of SSBs 3 and SSBs 4 to transmit exceeds a certain value, such as 16us, then only SSB1 and SSB 2 related data can be transmitted at this time. If LBT direction 1 is unsuccessful, LBT needs to be carried out again, and all SSBs cannot be sent.

Example 3:

in this embodiment, the network device supports that one direction of the directional LBT corresponds to 1 or more directions of the SSB, and each LBT can be flexibly combined and collocated. FIG. 7 is a diagram illustrating a network device supporting more SSBs and corresponding LBT directions;

the network device may perform LBT containing all required listening directions once according to the history information or the requirement of sending SSB. And carrying out k/Q-based monitoring threshold adjustment in each direction. For example, fig. 7 includes 8 SSB directions, and the LBT direction has 4-8 changes (a-e), for example, LBT direction 2 in fig. 7 a-b, LBT direction 3 in fig. 7 c-d, covers 2 SSB directions, so the listening threshold is 2/8 of the omni-directional LBT threshold; among other LBT directions, the LBT direction listening threshold covering 1 SSB direction is 1/8 of the omni-directional LBT threshold.

When the network device monitors that there is interference above the threshold in the LBT direction, it can be determined that the direction cannot perform corresponding SSB and data transmission. There are various options for the network device at this time:

selecting one of the following steps: no transmission is made and directional LBT continues. At this time, the network device may perform directional LBT again in a variety of ways, including but not limited to: then LBT in different directions of the original corresponding relation is carried out; and transforming the corresponding relation between the LBT direction and the SSB, and then carrying out LBT, then:

fig. 8 is an example of changing the corresponding relationship between LBT and SSB according to the interference source, as shown in fig. 8, when the network device monitors that there is interference in LBT direction 4, to further locate the interference direction, LBT direction four may be further decomposed into LBT direction 4 and LBT direction 5, to further locate the interference. After performing directional LBT, the network device may determine whether to continue LBT or enter option two.

Selecting two: and sending the SSB and the related system information in the LBT success direction. The information to be transmitted at this time cannot include information in the direction in which the listening was unsuccessful. The SSB related information is transmitted temporally consecutively if needed. Similar to the cases of embodiments 1 and 2, if some SSBs are unsuccessful and the transmission cannot be performed for a break time exceeding a certain value, for example, 16us, then only SSB1 and SSB related data can be transmitted. If LBT direction 1 is unsuccessful, LBT needs to be carried out again, and all SSBs cannot be sent.

Fig. 9 is a schematic diagram of an embodiment of a network device.

The embodiment of the application also provides a network device and a method using any one of the embodiments of the application. The network equipment is used for associating N directions of LBT with Q directions of SSB, so that Q is larger than or equal to N and covers at least one direction of SSB in any LBT direction; implementing the LBT procedure in at least 1 or all LBT directions; and in the LBT direction with successful monitoring, the covered SSB direction sequentially sends the corresponding SSB with the preset time domain symbol position according to the set sequence.

In order to implement the foregoing technical solution, the network device 400 provided in this 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 with directivity is passed, 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.

The network determining module is used for determining the incidence relation between the N directions of the LBT and the Q directions of the SSB, so that Q is larger than or equal to N and covers at least one SSB direction in any LBT direction; the network determining module is further configured to determine that a monitoring threshold is k/Q times of an omnidirectional LBT monitoring threshold in any 1 LBT direction covering k SSB directions; the network determining module is further configured to determine whether LBT procedure monitoring is successful; the network determining module is further configured to determine a time domain symbol position of the SSB; the network determining module is further configured to determine a set order of the Q SSBs or a set order of the N LBT directions for sending the SSBs.

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 8 of the present application, and is not described herein again.

Fig. 10 is a schematic diagram of an embodiment of a terminal device.

The present application further proposes a terminal device, configured to implement the method according to any of the embodiments of the first aspect of the present application. And the terminal equipment receives the SSB at a preset time domain symbol position.

And the terminal equipment receives the SSB at the preset position, and if the SSB is successfully received at the preset position, the LBT of the network equipment in the SSB direction is successful.

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.

And the terminal receiving module is used for receiving the SSB at a preset time domain symbol position.

And the terminal determining module is used for determining the actual time position for receiving the SSB and further determining whether the monitoring of the LBT direction of the network equipment is successful.

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 8 of the present application, and is not described herein again.

The terminal equipment can be mobile terminal equipment.

Fig. 11 shows 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 8 of the present application, which is run or changed 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. 12 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 8 of the present application, and the computer program runs or is changed 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 method. In particular, the computer-readable storage medium has stored thereon a computer program which, when executed by the processor 701, performs the steps of the method embodiments as described above with reference to any one of the embodiments of fig. 1 to 8.

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 Disks (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which 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 12, 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 to which the present application pertains. 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 transmission method supporting directional listen before transmit, which is used for 5G system, is characterized in that,

associating N directions of LBT with Q directions of SSB, so that Q is larger than or equal to N and covers at least one direction of SSB in any LBT direction;

covering any 1 LBT direction of k SSB directions, and taking k/Q times of an omnidirectional LBT monitoring threshold by the monitoring threshold;

and when the LBT direction is monitored to have interference higher than the threshold, decomposing the LBT direction for further positioning the interference direction.

2. The method of claim 1,

within a set time length, a plurality of preset time domain symbol positions of the SSB are divided into Q groups and are transmitted in a set sequence in Q directions.

3. The method of claim 1,

the direction of each 1 LBT covers the direction of 1 SSB.

4. The method of claim 1,

any 1 LBT procedure, using all or at least a portion of the N directions.

5. The method of claim 1,

at least 2 LBT procedures, using different ones, or at least a portion of the same ones, of the N directions.

6. The method of claim 1,

and in the direction of successful monitoring in the LBT process, the covered SSB direction sequentially sends the SSBs of the corresponding preset time domain symbol positions according to a set sequence.

7. The method of claim 6,

and sending the SSB after all LBT directions are monitored successfully.

8. The method of claim 6,

and after monitoring in one part of LBT directions successfully, sending the SSB, and abandoning the SSB in the preset time domain symbol position corresponding to the SSB direction covered in the LBT direction which is not monitored successfully.

9. The method of claim 8,

the abandoned SSB causes the interruption to exceed the set interval duration, and the SSB of the preset time domain symbol position corresponding to the subsequent SSB direction is abandoned.

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

implementing an LBT procedure in at least 1 or all LBT directions;

and in the LBT direction in which monitoring is successful, the covered SSB directions sequentially send the SSBs of the corresponding preset time domain symbol positions according to a set sequence.

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 at a preset time domain symbol position.

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.