CN110460411B

CN110460411B - PBCH (physical broadcast channel) repeated sending and receiving method and device, storage medium, base station and user equipment

Info

Publication number: CN110460411B
Application number: CN201910732997.2A
Authority: CN
Inventors: 周欢; 周化雨
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2019-08-09
Filing date: 2019-08-09
Publication date: 2021-12-14
Anticipated expiration: 2039-08-09
Also published as: CN110460411A; WO2021027693A1

Abstract

A PBCH repeated sending method, a PBCH repeated receiving method, a PBCH repeated sending device, a PBCH repeated receiving device, a storage medium, a base station and user equipment are provided, wherein the PBCH repeated sending method comprises the following steps: determining a repeated sending opportunity of PBCH as a time slot for transmitting an SSB set, a time slot for not transmitting the SSB set and/or a synchronous signal search window, wherein the SSB set comprises a plurality of SSBs, and each SSB comprises PBCH; and repeatedly transmitting at least one PBCH in the SSB set at the repeated transmission opportunity. The technical scheme of the invention can enhance the coverage of the downlink channel signal.

Description

PBCH (physical broadcast channel) repeated sending and receiving method and device, storage medium, base station and user equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a PBCH repeat transmission method, a PBCH repeat reception apparatus, a storage medium, a base station, and a user equipment.

Background

In a New Radio (NR) system, each Radio frame is divided into 10 subframes with the same size and length of 1ms in a Radio frame with a time domain length of 10ms, and each subframe may include multiple slots (slots) according to different subcarrier intervals. Each slot is formed of a certain number of symbols, and the number of symbols is determined by a Cyclic Prefix (CP) type. The NR system supports multi-beam Synchronization Signal (SS), secondary synchronization Signal, and Physical Broadcast Channel (PBCH) transmission. A Synchronization Signal Block (SSB) (which may also be referred to as SS/PBCH block) typically occupies 4 OFDM symbols, and is located within a search window in relation to Sub-Carrier Space (SCS) and the number of beams L. The SSBs form an SSB set, and the maximum number of SSBs that can be transmitted in the SSB set is denoted as Lmax. Lmax is 4 in the frequency band below 3GHz, Lmax is 8 in the frequency band below 5GHz, and Lmax is 64 in the frequency band above 5 GHz.

However, in the prior art, the downlink channel signal strength is weak, and the requirement of some scenarios on the downlink channel signal cannot be met, for example, the number of receiving antennas of User Equipment (UE) is small, or the UE is in a scenario with low coverage.

Disclosure of Invention

The technical problem solved by the invention is how to enhance the coverage of downlink channel signals.

In order to solve the above technical problem, an embodiment of the present invention provides a PBCH repetition transmission method, where the PBCH repetition transmission method includes: determining a repeated sending opportunity of PBCH as a time slot for transmitting an SSB set, a time slot for not transmitting the SSB set and/or a synchronous signal search window, wherein the SSB set comprises a plurality of SSBs, and each SSB comprises PBCH; and repeatedly transmitting at least one PBCH in the SSB set at the repeated transmission opportunity.

Optionally, the determining that the repeated PBCH transmission opportunity is a timeslot in which the SSB set is not transmitted includes: and determining the position of the time slot which does not transmit the SSB set according to the subcarrier interval and the maximum number of the SSBs which can be sent in the SSB set.

Optionally, the determining, according to the subcarrier spacing and the maximum number of SSBs that can be sent in the SSB set, the position of the timeslot in which the SSB set is not transmitted includes: if the subcarrier interval is 15KHz or 30KHz, determining that the time domain offset of the time slot of the non-transmission SSB set and the time slot of the current transmission SSB set is Lmax/2, wherein Lmax is the maximum number; or if the subcarrier interval is 120KHz, determining that the time domain offset of the time slot of the SSB set which is not transmitted and the time slot of the SSB set which is currently transmitted is Lmax/8; or, if the subcarrier spacing is 240KHz, the time domain offset of the time slot of the SSB set not transmitted and the time slot of the SSB set currently transmitted is determined to be (Lmax ÷ 2) + 4.

Optionally, the determining that the repeated PBCH transmission opportunity is a timeslot in which the SSB set is not transmitted includes: and determining the time slot with the time domain offset value of the time slot of the current transmission SSB set as a preset value as the time slot of the non-transmission SSB set.

Optionally, the repeatedly sending at least one PBCH in the SSB set at the repeated sending opportunity includes: when the repeated sending opportunity is a time slot for not transmitting the SSB set, determining the repeated transmission times of a single PBCH and the number of symbols occupied by the single PBCH in one-time transmission; determining the number of types of PBCH which can be sent in the time slot of the SSB set in non-transmission according to the number of repeated transmission times of the single PBCH and the number of symbols occupied by the single PBCH in one transmission; and transmitting each type of PBCH according to the repeated transmission times of a single PBCH and the number of symbols occupied by the single PBCH in one transmission in the time slot in which the SSB set is not transmitted.

Optionally, the number of symbols occupied by a single PBCH in one transmission is 3, and the single PBCH occupies 16 resource blocks on each symbol; or, the number of symbols occupied by a single PBCH in one transmission is 2, and the single PBCH occupies 20 resource blocks on each symbol; or, the number of symbols occupied by a single PBCH in one transmission is 3, the single PBCH occupies 20 resource blocks on the first two symbols, respectively, and the single PBCH occupies 8 resource blocks on the third symbol.

Optionally, the repeatedly sending at least one PBCH in the SSB set at the repeated sending opportunity includes: when the repeated sending opportunity is the time slot for transmitting the SSB set, determining idle symbols in the time slot for transmitting the SSB set; repeatedly transmitting PBCH within the set of SSBs on the idle symbols.

Optionally, the number of symbols occupied by a single PBCH in one transmission is 2, the single PBCH occupies 20 resource blocks on each symbol, and the single PBCH occupies 8 resource blocks on the symbol where the primary synchronization signal is located.

Optionally, the repeatedly sending at least one PBCH in the SSB set at the repeated sending opportunity includes: when the repeated sending opportunity is the synchronous signal searching window, determining an idle time slot in the synchronous signal searching window; and repeatedly transmitting the SSB set by utilizing the idle time slot.

In order to solve the above technical problem, an embodiment of the present invention further discloses a PBCH repetition receiving method, where the PBCH repetition receiving method includes: determining a repeated sending opportunity of PBCH as a time slot for transmitting an SSB set, a time slot for not transmitting the SSB set and/or a synchronous signal search window, wherein the SSB set comprises a plurality of SSBs, and each SSB comprises PBCH; and repeatedly receiving at least one PBCH in the SSB set at the repeated sending opportunity.

In order to solve the above technical problem, an embodiment of the present invention further discloses a PBCH repetition transmission apparatus, where the PBCH repetition transmission apparatus includes: a repeated transmission opportunity determining module, configured to determine a repeated transmission opportunity of a PBCH as a timeslot for transmitting an SSB set, a timeslot for not transmitting the SSB set, and/or a synchronization signal search window, where the SSB set includes multiple SSBs, and each SSB includes a PBCH; a PBCH repetition sending module, configured to repeatedly send at least one PBCH in the SSB set at the repetition sending opportunity.

The embodiment of the invention also discloses a PBCH repeated receiving device, which comprises: a sending opportunity determining module, configured to determine a repeated sending opportunity of the PBCH as a timeslot for transmitting an SSB set, a timeslot for not transmitting the SSB set, and/or a synchronization signal search window, where the SSB set includes multiple SSBs, and each SSB includes the PBCH; a PBCH repetition reception module, configured to repeatedly receive at least one PBCH in the SSB set at the repeated transmission opportunity.

The embodiment of the invention also discloses a storage medium, which stores computer instructions, and the computer instructions execute the steps of the PBCH repeated sending method or the steps of the PBCH repeated receiving method when running.

The embodiment of the invention also discloses a base station, which comprises a memory and a processor, wherein the memory is stored with a computer instruction which can be operated on the processor, and the processor executes the step of the PBCH repeated sending method when operating the computer instruction.

The embodiment of the invention also discloses user equipment which comprises a memory and a processor, wherein the memory is stored with computer instructions capable of running on the processor, and the processor executes the steps of the PBCH repeated receiving method when running the computer instructions.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

the technical scheme of the invention determines the repeated sending opportunity of PBCH as a time slot for transmitting an SSB set, a time slot for not transmitting the SSB set and/or a synchronous signal search window, wherein the SSB set comprises a plurality of SSBs, and each SSB comprises PBCH; and repeatedly transmitting at least one PBCH in the SSB set at the repeated transmission opportunity. The technical scheme of the invention increases the sending opportunity of the PBCH by determining the repeated sending opportunity and realizing the repeated sending of the PBCH on the repeated sending opportunity, so that the probability of the PBCH received by the user equipment is increased, and the coverage of the PBCH is further enhanced.

Drawings

Fig. 1 is a flowchart of a PBCH repetition transmission method according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the location of an SSB in a timeslot according to an embodiment of the present invention;

fig. 3 is a partial flowchart of a PBCH repetition transmission method according to an embodiment of the present invention;

FIG. 4 is a flowchart of one embodiment of step S102 shown in FIG. 1;

figure 5 is a schematic diagram of the position of a PBCH repeatedly transmitted in a timeslot according to an embodiment of the present invention;

FIG. 6 is a diagram illustrating a synchronization signal search window according to an embodiment of the present invention;

fig. 7 is a flowchart of a PBCH repetition reception method according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a PBCH repetition rate transmission apparatus according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a PBCH repetition reception apparatus according to an embodiment of the present invention.

Detailed Description

As described in the background art, in the prior art, the downlink channel signal strength is weak, and the requirement of some scenarios on the downlink channel signal cannot be met, for example, the number of receiving antennas of User Equipment (UE) is small, or the UE is in a scenario with low coverage.

The inventor of the present application finds that the SSB includes a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a PBCH, and the PSS and the SSS are both sequences, and the actual reception performance is better, but the PBCH has carried information, has codes, and the received Signal is worse. Therefore, in order to improve the coverage of the downlink channel signals, the reception performance of the PBCH can be enhanced.

The technical scheme of the invention increases the sending opportunity of the PBCH by determining the repeated sending opportunity and realizing the repeated sending of the PBCH on the repeated sending opportunity, so that the probability of the PBCH received by the user equipment is increased, and the coverage of the PBCH is further enhanced.

The technical scheme of the invention can be applied to 5G (5Generation) communication systems, 4G and 3G communication systems, and various future new communication systems such as 6G and 7G.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Fig. 1 is a flowchart of a PBCH repetition transmission method according to an embodiment of the present invention.

The PBCH repetition transmission method may be used on a network device side, such as a base station side, that is, the base station may perform the steps shown in fig. 1.

The PBCH repetition transmission method may include the steps of:

step S101: determining a repeated sending opportunity of PBCH as a time slot for transmitting an SSB set, a time slot for not transmitting the SSB set and/or a synchronous signal search window, wherein the SSB set comprises a plurality of SSBs, and each SSB comprises PBCH;

step S102: and repeatedly transmitting at least one PBCH in the SSB set at the repeated transmission opportunity.

It should be noted that the sequence numbers of the steps in this embodiment do not represent a limitation on the execution sequence of the steps.

In this embodiment, the repetition transmission timing is for repetition transmission of PBCH. The specific time domain location of the repeated transmission opportunity may be predetermined by a communication standard protocol.

In the specific implementation of step S101, the base station may determine the repeated transmission timing of the PBCH by a pre-agreed communication standard protocol, or the base station autonomously determines the repeated transmission timing of the PBCH, that is, the repeated transmission timing may be a timeslot for transmitting the SSB set, a timeslot for not transmitting the SSB set, or a synchronization signal search window, or may also be a combination of any two or three of the foregoing.

Wherein, the time slot for transmitting the SSB set refers to the time slot for transmitting the SSB set; the time slot not transmitting the SSB set refers to a time slot not used for transmitting the SSB set, and may specifically be an idle time slot; the synchronization signal search window refers to a window in which a User Equipment (UE) searches for a synchronization signal, and the size of the window may be 5 ms.

Further, in the implementation of step S102, the base station may repeatedly transmit at least one PBCH in the SSB set at the repeated transmission opportunity. Specifically, the SSB set may include a plurality of SSBs, each SSB including one PBCH, that is, the SSB set includes a plurality of PBCHs. The number of PBCHs that can be transmitted by the base station in the repetition transmission opportunity may be one or more.

Further, the base station may repeat the transmission of the PBCH to be transmitted once or multiple times within the repetition transmission opportunity.

The embodiment of the invention determines the repeated sending opportunity and realizes the repeated sending of the PBCH on the repeated sending opportunity, thereby increasing the sending opportunity of the PBCH, increasing the probability of the PBCH received by the user equipment and further realizing the enhancement of the coverage of the PBCH.

In one non-limiting embodiment of the present invention, step S101 shown in fig. 1 may include the following steps: and determining the position of the time slot which does not transmit the SSB set according to the subcarrier interval and the maximum number of the SSBs which can be sent in the SSB set.

In this embodiment, the repeated transmission timing is a time slot in which the SSB set is not transmitted.

As described in the background art, in the frequency band below 3GHz, the maximum number Lmax of SSBs that can be transmitted in the SSB set is 4; in the frequency band below 5GHz, the maximum number Lmax of SSBs that can be transmitted in the SSB set is 8; in the frequency band above 5GHz, the maximum number Lmax of SSBs that can be transmitted in the SSB set is 64.

Referring to fig. 2, Case a in fig. 2 represents the Case when the subcarrier spacing is 15 kHz: the first time domain symbol of the SSB is located at {2,8} +14 × n, and when the carrier frequency is equal to or less than 3GHz, n is 0, 1; when the carrier frequency is less than or equal to 6GHz, n is 0,1,2 and 3.

Case B shown in fig. 2 represents a Case where the subcarrier spacing is 30 kHz: the first time domain symbol of the SSB is located at {4,8,16,20} +28 × n, where n is 0 when the carrier frequency is equal to or less than 3 GHz; when the carrier frequency is less than or equal to 6GHz, n is 0, 1.

Case C shown in fig. 2 represents another Case where the subcarrier spacing is 30 kHz: the first time domain symbol of the SSB is located at {2,8} +14 × n, and when the carrier frequency is equal to or less than 3GHz, n is 0, 1; when the carrier frequency is less than or equal to 6GHz, n is 0,1,2 and 3.

Case D shown in fig. 2 represents the Case when the subcarrier spacing is 120 kHz: the first time domain symbol of the SSB is located at 4,8,16,20 +28 × n. When the carrier frequency is greater than 6GHz, n is 0,1,2,3,5,6,7,8,10,11,12,13,15,16,17, 18.

Case E shown in fig. 2 represents the Case when the subcarrier spacing is 240 kHz: the first time domain symbol of the SSB is located at {8,12,16,20,32,36,40,44} +56 × n. When the carrier frequency is greater than 6GHz, n is 0,1,2,3,5,6,7, 8.

In this embodiment, the specific position of the timeslot where the SSB set is not transmitted is selected according to the subcarrier spacing and Lmax, so that the timeslot where the SSB set is not transmitted is close to the timeslot where the SSB set is transmitted, and the sending performance of PBCH repeated sending is ensured.

Further, referring to fig. 3, determining the position of the timeslot in which the SSB set is not transmitted according to the subcarrier spacing and the maximum number of SSBs that can be sent in the SSB set includes:

step S301: if the subcarrier interval is 15KHz or 30KHz, determining that the time domain offset of the time slot of the non-transmission SSB set and the time slot of the current transmission SSB set is Lmax/2, wherein Lmax is the maximum number;

step S302: if the subcarrier spacing is 240KHz, the time domain offset of the time slot of the non-transmitted SSB set and the time slot of the current transmitted SSB set is determined to be (Lmax ÷ 2) + 4.

Specifically, if the subcarrier spacing is 120KHz, the time domain offset of the time slot in which the SSB set is not transmitted from the time slot in which the SSB set is currently transmitted is determined to be Lmax/8.

In this embodiment, one of the steps S301 and S302 may be selectively executed according to actual requirements.

In a specific implementation, the time slot of the current transmission SSB is a time slot n, and an offset between the time slot where the repeated transmission opportunity is located and the time slot n is k.

The value of the offset k may vary with subcarrier spacing or with a maximum number Lmax, which is related to the carrier frequency.

Specifically, the time slot in which the set of SSBs is not transmitted is n + (Lmax/2) when the subcarrier spacing is 15KHz or 30 KHz. The time slot for non-transmission of the set of SSBs is n + (Lmax/2) +4 at a subcarrier spacing of 240 KHz.

And after calculating the offset k, calculating the time slot of the non-transmission SSB set as the time slot n + k according to the time slot n of the current transmission SSB and the time domain offset k.

It is to be understood that the value of the offset k may also be directly specified by the communication standard protocol, and the embodiment of the present invention is not limited thereto. Specifically, the protocol may stipulate that the time domain offset between the time slot in which the SSB set is not transmitted and the time slot in which the SSB set is currently transmitted is a preset value. Therefore, the base station can determine a preset value according to the protocol and then determine the specific position of the time slot of the current transmission SSB set.

In a non-limiting embodiment of the present invention, referring to fig. 4, step S102 shown in fig. 1 may include the following steps:

step S401: when the repeated sending opportunity is a time slot for not transmitting the SSB set, determining the repeated transmission times of a single PBCH and the number of symbols occupied by the single PBCH in one-time transmission;

step S402: determining the number of types of PBCH which can be sent in the time slot of the SSB set in non-transmission according to the number of repeated transmission times of the single PBCH and the number of symbols occupied by the single PBCH in one transmission;

step S403: and transmitting each type of PBCH according to the repeated transmission times of a single PBCH and the number of symbols occupied by the single PBCH in one transmission in the time slot in which the SSB set is not transmitted.

Since the time slot in which the SSB set is not transmitted may be an idle time slot, at least one PBCH may be transmitted on an idle symbol of the entire time slot, and specifically, the number of repeated transmissions of a single PBCH and the number of symbols occupied by the single PBCH in one transmission may be determined first to determine the symbols occupied by each PBCH to be transmitted.

Referring also to fig. 5, the repeated transmission timing is a slot n + k, and the slot n + k includes 14 symbols. It can be determined that the number of repeated transmission of a single PBCH is 1 and the number of symbols occupied by the single PBCH in one transmission is 3, then four types of PBCH can be transmitted in the slot n + k, that is, PBCH in SSB0, PBCH in SSB1, PBCH in SSB2, and PBCH in SSB 3. Specifically, PBCH in SSB0 is located at

symbols

2,3, and 4, PBCH in SSB1 is located at

symbols

5,6, and 7, PBCH in SSB2 is located at

symbols

8, 9, and 10, and PBCH in SSB3 is located at

symbols

11,12, and 13.

Alternatively, it may be determined that the number of repeated transmission times of a single PBCH is 2 and the number of symbols occupied by the single PBCH in one transmission is 3, then 2 types of PBCH, that is, PBCH in SSB0 and PBCH in SSB1, can be transmitted in the time slot n + k. Specifically, the PBCH in the SSB0 of the first repeated transmission is located at

symbols

2,3 and 4, and the PBCH in the SSB0 of the second repeated transmission is located at

symbols

5,6 and 7; the PBCH in the SSB1 of the first repeated transmission is located at

symbols

8, 9 and 10, and the PBCH in the SSB1 of the second repeated transmission is located at

symbols

11,12 and 13.

It can be appreciated that since the first two symbols, i.e., symbol 0 and symbol 1, in each slot are typically used for transmitting important data, the first two symbols in the slot are avoided from being occupied when the PBCH is repeatedly transmitted.

Further, the number of symbols occupied by a single PBCH in one transmission is 3, and the single PBCH occupies 16 resource blocks on each symbol; or, the number of symbols occupied by a single PBCH in one transmission is 2, and the single PBCH occupies 20 resource blocks on each symbol; or, the number of symbols occupied by a single PBCH in one transmission is 3, the single PBCH occupies 20 resource blocks on the first two symbols, respectively, and the single PBCH occupies 8 resource blocks on the third symbol.

In this embodiment, the PBCH needs to occupy 48 Resource Blocks (RBs). When the number of symbols occupied by a single PBCH at one transmission is 3, it may occupy 16 RBs per symbol.

Alternatively, a single PBCH may occupy 2 symbols in one transmission, which may occupy 20 resource blocks per symbol. In this case, the PBCH occupies 40 RBs in total, so the PBCH repeatedly transmitted can carry only partial information of the original PBCH.

Alternatively, the number of symbols occupied by a single PBCH in one transmission is 3, the single PBCH occupies 20 RBs on the first two symbols, respectively, and the single PBCH occupies 8 RBs on the third symbol. The position of the repeatedly transmitted PBCH occupying 8 RBs on the third symbol may be the middle 8 RBs of the third symbol in the frequency domain, or may be the highest 8 RBs of the third symbol in the frequency domain, or may be the lowest 8 RBs of the third symbol in the frequency domain, or may also be the lowest 4 RBs and the highest 4 RBs of the third symbol in the frequency domain.

In one non-limiting embodiment of the present invention, step S102 shown in fig. 1 may include the following steps: when the repeated sending opportunity is the time slot for transmitting the SSB set, determining idle symbols in the time slot for transmitting the SSB set; repeatedly transmitting PBCH within the set of SSBs on the idle symbols.

The embodiment of the invention can repeatedly send PBCH by idle symbol quotient in the time slot for transmitting the SSB set.

Specifically, referring to fig. 2, for the case when the subcarrier spacing is 15kHz, the

SSBs

0 and 1 in the SSB set occupy symbols 2-5 and 8-11, respectively, in the current slot, and the idle symbols in the current slot are

symbols

0,1, 6,7, 12, and 13.

As mentioned above, since the first two symbols, i.e., symbol 0 and symbol 1, in each slot are generally used for transmitting important data, the first two symbols in the slot are avoided from being occupied when the PBCH is repeatedly transmitted. The PBCH of SSB0 may be repeatedly sent on

symbols

6 and 7, and the PBCH of SSB1 may be repeatedly sent on

symbols

12 and 13.

Further, the number of symbols occupied by a single PBCH in one transmission is 2, the single PBCH occupies 20 resource blocks on each symbol, and the single PBCH occupies 8 resource blocks on the symbol where the primary synchronization signal is located.

In this embodiment, referring to fig. 2, since only two symbols (total 40 RBs) are used for repeatedly transmitting the PBCH, the PBCH needs to occupy 48 RBs, and the PSS has an idle resource block on the symbol, the PBCH repeatedly transmitted may occupy 20 RBs on two idle symbols, and the remaining 8 RBs may be located on the symbol where the PSS is located.

In one non-limiting embodiment of the present invention, step S102 shown in fig. 1 may include the following steps: when the repeated sending opportunity is the synchronous signal searching window, determining an idle time slot in the synchronous signal searching window; and repeatedly transmitting the SSB set by utilizing the idle time slot.

In this embodiment, the content repeatedly transmitted includes not only the PBCH, but also the PSS and the SSS, that is, the SSB set may be repeatedly transmitted.

Since the UE searches for the synchronization signal within the synchronization signal search window, the SSB set may be repeatedly transmitted in an idle slot within the synchronization signal search window.

Specifically, referring to fig. 6, when the length of the synchronization signal search window is 5ms, for the SSB set with a subcarrier interval of 30KHz, the time slots occupied by the transmission SSB set are time slots 0-3 (totally occupy 4 time slots), and the idle time slots of the synchronization signal search window are time slots 4-9 (that is, the number of the idle time slots is 6, which is greater than the number of time slots required for transmitting the SSB set), so that the SSB set can be repeatedly transmitted in the time slots 4-9. Similarly, for the SSB set with a subcarrier spacing of 30KHz, the SSB set may also be repeatedly transmitted within a synchronization signal search window with a length of 5 ms.

For the SSB sets with subcarrier intervals of 15KHz and 120KHz, since the idle time slots in the synchronization signal search window with a length of 5ms are less, that is, less than the number of time slots required for transmitting the SSB sets, and all the SSB sets cannot be transmitted, in this case, the time length of the synchronization signal search window may be increased, for example, the length of the synchronization signal search window is 10ms, which is not limited in the embodiment of the present invention.

Referring to fig. 7, the PBCH repetition receiving method may be used on the user equipment side, that is, the UE may perform the steps shown in fig. 7.

The PBCH repetition reception method may include the steps of:

step S701: determining a repeated sending opportunity of PBCH as a time slot for transmitting an SSB set, a time slot for not transmitting the SSB set and/or a synchronous signal search window, wherein the SSB set comprises a plurality of SSBs, and each SSB comprises PBCH;

step S702: and repeatedly receiving at least one PBCH in the SSB set at the repeated sending opportunity.

In the embodiment of the invention, the UE determines the repeated sending opportunity and realizes the repeated receiving of the PBCH on the repeated sending opportunity, thereby increasing the receiving opportunity of the PBCH, increasing the probability of the PBCH received by the user equipment and further realizing the enhancement of the coverage of the PBCH.

Referring to fig. 8, the PBCH repetition transmission apparatus 80 may include:

a repeated transmission timing determining module 801, configured to determine a repeated transmission timing of a PBCH as a timeslot for transmitting an SSB set, a timeslot for not transmitting the SSB set, and/or a synchronization signal search window, where the SSB set includes multiple SSBs, and each SSB includes a PBCH;

a PBCH repetition sending module 802, configured to repeatedly send at least one PBCH in the SSB set at the repetition sending opportunity.

Referring to fig. 9, the PBCH repetition reception apparatus 90 may include:

a sending opportunity determining module 901, configured to determine a repeated sending opportunity of the PBCH as a timeslot for transmitting an SSB set, a timeslot for not transmitting the SSB set, and/or a synchronization signal search window, where the SSB set includes multiple SSBs, and each SSB includes the PBCH;

a PBCH repetition reception module 902, configured to repeatedly receive at least one PBCH in the SSB set at the repeated transmission opportunity.

For more details of the operation principle and the operation mode of the PBCH repetition transmitter 80 and the PBCH repetition receiver 90, reference may be made to the relevant descriptions in fig. 1 to fig. 7, which are not repeated herein.

The embodiment of the invention also discloses a storage medium, which stores computer instructions, and the computer instructions can execute the steps of the methods shown in the figures 1, 3, 4 and 7 when running. The storage medium may include ROM, RAM, magnetic or optical disks, etc. The storage medium may further include a non-volatile memory (non-volatile) or a non-transitory memory (non-transient), and the like.

The embodiment of the invention also discloses a base station which can comprise a memory and a processor, wherein the memory is stored with computer instructions capable of running on the processor. The processor, when executing the computer instructions, may perform the steps of the methods shown in fig. 1, 3, 4.

The embodiment of the invention also discloses user equipment which can comprise a memory and a processor, wherein the memory is stored with computer instructions capable of running on the processor. The processor, when executing the computer instructions, may perform the steps of the method shown in fig. 7. The user equipment includes but is not limited to a mobile phone, a computer, a tablet computer and other terminal equipment.

The ue in the embodiments of the present invention may be any implementable access terminal, subscriber unit, subscriber station, mobile station (mobile station, MS), remote station, remote terminal, mobile device, user terminal, terminal device (terminal equipment), wireless communication device, user agent, or user equipment. The user equipment may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a Wireless communication function, a computing device or other processing devices connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which is not limited in this embodiment.

A Base Station (BS) in the embodiment of the present application, which may also be referred to as a base station device, is a device deployed in a Radio Access Network (RAN) to provide a wireless communication function. For example, a device providing a base station function in a 2G network includes a Base Transceiver Station (BTS), a device providing a base station function in a 3G network includes a node b (nodeb), apparatuses for providing a base station function in a 4G network include evolved node bs (enbs), which, in a Wireless Local Area Network (WLAN), the devices providing the base station function are an Access Point (AP), a device gNB providing the base station function in a New Radio (NR) of 5G, and a node B (ng-eNB) continuing to evolve, the gNB and the terminal communicate with each other by adopting an NR (NR) technology, the ng-eNB and the terminal communicate with each other by adopting an E-UTRA (evolved Universal Terrestrial Radio Access) technology, and both the gNB and the ng-eNB can be connected to a 5G core network. The base station in the embodiment of the present application also includes a device and the like that provide a function of the base station in a future new communication system. It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this document indicates that the former and latter related objects are in an "or" relationship.

The "plurality" appearing in the embodiments of the present application means two or more.

It should be understood that, in the embodiment of the present application, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example and not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM), SDRAM (SLDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).

The embodiments described above in this application may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire or wirelessly. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed method, apparatus and system may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative; for example, the division of the unit is only a logic function division, and there may be another division manner in actual implementation; for example, various elements or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for transmitting a PBCH repetition, comprising:

determining a repeated sending opportunity of PBCH as a time slot of a non-transmission SSB set, wherein the SSB set comprises a plurality of SSBs, and each SSB comprises PBCH;

repeatedly transmitting at least one PBCH in the SSB set at the repeated transmission opportunity;

the determining that the repeated transmission opportunity of the PBCH is a time slot in which the SSB set is not transmitted includes:

determining the position of a time slot for not transmitting the SSB set according to the subcarrier interval and the maximum number of SSBs which can be sent in the SSB set;

the determining, according to the subcarrier spacing and the maximum number of SSBs that can be sent in the SSB set, the position of a timeslot in which the SSB set is not transmitted includes:

if the subcarrier interval is 15KHz or 30KHz, determining that the time domain offset of the time slot of the non-transmission SSB set and the time slot of the current transmission SSB set is Lmax/2, wherein Lmax is the maximum number;

or if the subcarrier interval is 120KHz, determining that the time domain offset of the time slot of the SSB set which is not transmitted and the time slot of the SSB set which is currently transmitted is Lmax/8;

or, if the subcarrier spacing is 240KHz, the time domain offset of the time slot of the SSB set not transmitted and the time slot of the SSB set currently transmitted is determined to be (Lmax ÷ 2) + 4.

2. The method of claim 1, wherein the determining the PBCH repetition transmission timing as a time slot not transmitting the SSB set comprises:

and determining the time slot with the time domain offset value of the time slot of the current transmission SSB set as a preset value as the time slot of the non-transmission SSB set.

3. The method of claim 1, wherein the repeatedly transmitting at least one PBCH in the SSB set at the repeated transmission opportunity comprises:

when the repeated sending opportunity is a time slot for not transmitting the SSB set, determining the repeated transmission times of a single PBCH and the number of symbols occupied by the single PBCH in one-time transmission;

determining the number of types of PBCH which can be sent in the time slot of the SSB set in non-transmission according to the number of repeated transmission times of the single PBCH and the number of symbols occupied by the single PBCH in one transmission;

and transmitting each type of PBCH according to the repeated transmission times of a single PBCH and the number of symbols occupied by the single PBCH in one transmission in the time slot in which the SSB set is not transmitted.

4. The method of claim 3, wherein the number of symbols occupied by a single PBCH in one transmission is 3, and the single PBCH occupies 16 resource blocks per symbol; or, the number of symbols occupied by a single PBCH in one transmission is 2, and the single PBCH occupies 20 resource blocks on each symbol; or, the number of symbols occupied by a single PBCH in one transmission is 3, the single PBCH occupies 20 resource blocks on the first two symbols, respectively, and the single PBCH occupies 8 resource blocks on the third symbol.

5. A PBCH repetition reception method, comprising:

repeatedly receiving at least one PBCH in the SSB set at the repeated transmission opportunity

and determining the position of the time slot which does not transmit the SSB set according to the subcarrier interval and the maximum number of the SSBs which can be sent in the SSB set.

6. An apparatus for PBCH repetition transmission, comprising:

a repeated transmission opportunity determining module, configured to determine a repeated transmission opportunity of a PBCH as a timeslot of a non-transmission SSB set, where the SSB set includes multiple SSBs, and each SSB includes the PBCH;

a PBCH repeat transmission module for repeatedly transmitting at least one PBCH in the SSB set at the repeat transmission opportunity

And the repeated sending opportunity determining module determines the position of a time slot which does not transmit the SSB set according to the subcarrier interval and the maximum number of the SSBs which can be sent in the SSB set.

7. A PBCH repetition reception apparatus, comprising:

a sending opportunity determining module, configured to determine a repeated sending opportunity of the PBCH as a timeslot of a non-transmission SSB set, where the SSB set includes multiple SSBs, and each SSB includes the PBCH;

a PBCH repetition reception module, configured to repeatedly receive at least one PBCH in the SSB set at the repeated transmission opportunity;

and the sending opportunity determining module determines the position of a time slot which does not transmit the SSB set according to the subcarrier interval and the maximum number of the SSBs which can be sent in the SSB set.

8. A storage medium having stored thereon computer instructions which, when executed, perform the steps of the PBCH repetition transmission method of any one of claims 1 to 4 or the steps of the PBCH repetition reception method of claim 5.

9. A base station comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the PBCH repetition transmission method of any one of claims 1 to 4.

10. A user equipment comprising a memory and a processor, said memory having stored thereon computer instructions executable on said processor, wherein said processor, when executing said computer instructions, performs the steps of the PBCH repetition reception method of claim 5.