WO2019191935A1

WO2019191935A1 - Method and device for transmitting synchronous broadcast blocks

Info

Publication number: WO2019191935A1
Application number: PCT/CN2018/081899
Authority: WO
Inventors: 刘洋
Original assignee: 北京小米移动软件有限公司
Priority date: 2018-04-04
Filing date: 2018-04-04
Publication date: 2019-10-10
Also published as: CN108513719B; CN108513719A

Abstract

The present invention relates to a method and device for transmitting synchronous broadcast blocks. The method comprises: detecting whether a channel at the current sending time is idle so as to send a group of synchronous broadcast blocks, the group of synchronous broadcast blocks at least comprising two synchronous broadcast blocks; when detected that the channel at the current sending time is idle, sending the group of synchronous broadcast blocks by means of beam scanning.

Description

Method and device for transmitting synchronous broadcast block

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting a synchronous broadcast block.

Background technique

In the related art, the industry recently conducted a research on the unlicensed spectrum of 5G (5th generation communication system), and proposed a scenario to support separate networking of unlicensed cells. In the 5G unlicensed spectrum design, the first step is to consider the design of the synchronous broadcast block (SS/PBCH Block, hereinafter abbreviated as SSB). In the 5G new air interface (NR), the SSB is generally not continuously transmitted, which causes the NR-U base station to perform frequent short detection to detect whether there are free resources for SSB transmission.

Summary of the invention

Embodiments of the present invention provide a method and apparatus for transmitting a synchronous broadcast block. The technical solution is as follows:

According to a first aspect of the embodiments of the present invention, a method for transmitting a synchronous broadcast block is provided, including:

Detecting whether the current transmission time channel is idle to send a set of synchronous broadcast blocks; the set of synchronous broadcast blocks includes at least two synchronous broadcast blocks;

The beam scan transmits the set of synchronous broadcast blocks when it is detected that the channel is idle at the current transmission time.

The technical solution provided by the embodiment of the present invention may include the following beneficial effects: the present embodiment continuously sends a plurality of synchronous broadcast blocks each time the synchronous broadcast block is sent, so as to reduce the number of times the network side detects idle available resources, and may be better. Coexist with WLAN (Wireless Local Area Network) systems.

In one embodiment, the ratio of the number of time domain symbols occupied by a group of synchronous broadcast blocks to the number of time domain symbols included in 1 ms does not exceed a preset ratio range; the ratio ranges from 50% to 70%.

The technical solution provided by the embodiment of the present invention may include the following beneficial effects: in this embodiment, the ratio of the duration of a group of synchronous broadcast blocks to the total duration of 1 ms is within a suitable range, which can coexist better with the WLAN system, and Try not to affect the transmission of uplink information.

In one embodiment, multiple simultaneous broadcast blocks in a group are consecutively symbolically.

The technical solution provided by the embodiment of the present invention may include the following beneficial effects: the multiple synchronous broadcast blocks in a group in this embodiment are consecutively symbolized, the number of detections of the base station may be reduced, and the gap between the synchronous broadcast blocks may be reduced. Can coexist better with WLAN systems.

In one embodiment, one isochronous broadcast block occupies 2 time domain symbols or 4 time domain symbols.

The technical solution provided by the embodiment of the present invention may include the following beneficial effects: The embodiment provides a solution that multiple synchronous broadcast blocks occupy time domain symbols, and can be flexibly configured.

In one embodiment, when one synchronous broadcast block occupies 4 time domain symbols, for a low frequency band, the set of synchronous broadcast blocks includes two or 4 synchronous broadcast blocks; for a high frequency band, the set of synchronous broadcasts The block includes 4 or 8 simultaneous broadcast blocks;

When a synchronous broadcast block occupies 2 time domain symbols, for a low frequency band, the set of synchronous broadcast blocks includes 4 or 8 synchronous broadcast blocks; for a high frequency band, the set of synchronous broadcast blocks includes 8 or 16 Synchronous broadcast blocks.

The technical solution provided by the embodiment of the present invention may include the following beneficial effects: the present embodiment provides that the time domain width of the synchronous broadcast block is different, and the number of synchronous broadcast blocks included in a group of synchronous broadcast blocks may also have corresponding changes. In order to better coexist with the WLAN system.

According to a second aspect of the embodiments of the present invention, an apparatus for transmitting a synchronous broadcast block is provided, including:

a detecting module, configured to detect whether a channel is idle at a current sending time, to send a set of synchronous broadcast blocks; and the set of synchronous broadcast blocks includes at least two synchronous broadcast blocks;

And a sending module, configured to: when the channel is idle at the current transmission time, the beam scan sends the set of synchronous broadcast blocks.

According to a third aspect of the embodiments of the present invention, an apparatus for transmitting a synchronous broadcast block is provided, including:

processor;

a memory for storing processor executable instructions;

Wherein the processor is configured to:

According to a fourth aspect of the embodiments of the present invention, there is provided a computer readable storage medium having stored thereon computer instructions for implementing the above method of transmitting a synchronous broadcast block when executed by a processor.

The above general description and the following detailed description are intended to be illustrative and not restrictive.

DRAWINGS

The accompanying drawings, which are incorporated in the specification of FIG

FIG. 1 is a flowchart of a method of transmitting a synchronous broadcast block, according to an exemplary embodiment.

FIG. 2 is a schematic diagram of a synchronous broadcast block according to an exemplary embodiment.

FIG. 3 is a schematic diagram of a synchronous broadcast block according to a specific embodiment.

FIG. 4 is a schematic diagram of a synchronous broadcast block according to an exemplary embodiment.

FIG. 5 is a block diagram of an apparatus for transmitting a synchronous broadcast block, according to a first embodiment.

FIG. 6 is a block diagram of an apparatus suitable for transmitting a synchronous broadcast block, according to an exemplary embodiment.

detailed description

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. The following description refers to the same or similar elements in the different figures unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with aspects of the invention as detailed in the appended claims.

In the related art, the industry proposes to implement an unlicensed spectrum independent networking, that is, independent of a new air interface (NR) cell, and all functions such as initial access by a cell in an unlicensed band. First, the transmission of synchronous broadcast blocks needs to be implemented in an unlicensed spectrum cell. In 5G, the SSB is generally not continuously transmitted, which causes the base station to perform frequent short detection to detect whether there are idle resources for SSB transmission. Moreover, the delay of the second SSB transmission may affect the coexistence of the mobile communication system and the WLAN system, and does not conform to the fairness principle of the WLAN system.

In order to solve the above problem, in this embodiment, a set of synchronous broadcast blocks are transmitted at a time, the base station is frequently shortly detected, and the delayed transmission synchronous broadcast block is reduced. Can coexist better with WLAN systems.

FIG. 1 is a flowchart of a method for transmitting a synchronous broadcast block, which is used for a network access device such as a base station, according to an exemplary embodiment. As shown in FIG. 1, the method includes the following steps 101-102.

In step 101, it is detected whether the current transmission time channel is idle to send a set of synchronous broadcast blocks; the set of synchronous broadcast blocks includes at least two synchronous broadcast blocks;

In step 102, the beam scan transmits the set of synchronous broadcast blocks when it is detected that the channel is idle at the current transmission time.

When the channel is detected to be idle at the current transmission time, the set of synchronous broadcast blocks is discarded. After ending the process, step 101 may be continued to detect for the next set of synchronous broadcast blocks or the next subframe.

In this embodiment, the base station detects the current transmission time channel of a group of synchronous broadcast blocks, and detects whether the channel is idle. If idle, a set of synchronous broadcast blocks will be sent. The number of base station detections is reduced, which saves system power consumption. Multiple synchronous broadcast blocks form a group, which can better coexist with the WLAN system and satisfy the fairness principle of the WLAN system as much as possible.

The detection in this embodiment can employ a short detection such as 25 μs, which is suitable for short detection of the discovery signal. The synchronization signal, the reference signal, and the like in the synchronous broadcast block belong to the discovery signal.

Among them, in the range of proportions, a value of 58% can be taken.

In this embodiment, as many synchronous broadcast blocks as possible form a group to reduce the number of detections of the base station and the transmission delay of the synchronous broadcast block as much as possible. On the other hand, the number of intra-synchronous broadcast blocks should not be too large, and the synchronous broadcast block should not occupy too much channel duration, which affects the transmission of uplink information. Therefore, the present embodiment provides a relatively suitable range of ratios to balance the needs of various aspects.

In this embodiment, a plurality of synchronous broadcast blocks in a group are consecutively symbolized, and the transmission delay can be reduced as much as possible, and coexisting better with the WLAN system.

As shown in FIG. 2, L=4 is taken as an example, and L is the maximum number of synchronous broadcast blocks that can be transmitted in one cycle. In the low frequency band of 15K, one synchronous broadcast block occupies four time domain symbols, and two synchronous broadcast block time slots are consecutive, occupying a total of eight time domain symbols, forming a group. A set of synchronous broadcast blocks are transmitted in one time slot. The starting position of a group of synchronous broadcast blocks in one time slot can be flexibly configured by the base station. In other examples, multiple sets of synchronous broadcast blocks may be transmitted in one time slot, and the greater the number of intra-synchronous broadcast blocks, the larger the transmission gap between groups may be, so as to better coexist with the WLAN system, and Convenient for uplink information transmission.

This embodiment provides a structure of a plurality of synchronous broadcast blocks, and one synchronous broadcast block can occupy four time domain symbols. Considering the system bandwidth requirement, the bandwidth occupied by one signal block is as much as 80% of the total bandwidth. Therefore, in this embodiment, one synchronous broadcast block can occupy two time domain symbols, as shown in FIG. 3 and FIG. The synchronous broadcast block includes PSS, SSS, broadcast information, and DMRS (Demodulation Reference Signal). The PSS is the primary synchronization signal, and the SSS is the secondary synchronization signal. The broadcast information is carried on a Physical Broadcast Channel (PBCH). The synchronous broadcast block occupies two time domain symbols, reducing the occupied time domain symbols to increase the occupied frequency domain bandwidth.

In one embodiment, when one synchronous broadcast block occupies 4 time domain symbols, for a low frequency band, the set of synchronous broadcast blocks includes two or 4 synchronous broadcast blocks; for a high frequency band, the set of synchronous broadcasts The block includes 4 or 8 simultaneous broadcast blocks.

In the present embodiment, the low frequency band refers to a frequency band less than or equal to 6 GHz. The frequency band above 6 GHz is a high frequency band. 1ms in the high band contains more time domain symbols, so more simultaneous broadcast blocks can be transmitted at once.

If a synchronous broadcast block occupies 2 time domain symbols, more time domain resources are saved, so more synchronous broadcast blocks can be continuously transmitted, and the probability of user equipment synchronization is improved.

The above embodiments can be freely combined as needed.

The following is an embodiment of the apparatus of the present invention, which can be used to carry out the method embodiments of the present invention.

FIG. 5 is a block diagram of an apparatus for transmitting a synchronous broadcast block, which may be implemented as part or all of an electronic device by software, hardware, or a combination of both, according to an exemplary embodiment. Referring to FIG. 5, the apparatus for transmitting a synchronous broadcast block includes a detecting module 501 and a transmitting module 502; wherein:

The detecting module 501 is configured to detect whether the current transmission time channel is idle to send a set of synchronous broadcast blocks; and the set of synchronous broadcast blocks includes at least two synchronous broadcast blocks.

The sending module 502 is configured to: when the channel is idle at the current transmission time, the beam scan sends the set of synchronous broadcast blocks.

With regard to the apparatus in the above embodiments, the specific manner in which the respective modules perform the operations has been described in detail in the embodiment relating to the method, and will not be explained in detail herein.

FIG. 6 is a block diagram of an apparatus 600 for transmitting a synchronous broadcast block, according to an exemplary embodiment. For example, device 600 can be provided as a computer. Referring to Figure 6, apparatus 600 includes a processing component 622 that further includes one or more processors, and memory resources represented by memory 632 for storing instructions executable by processing component 622, such as an application. An application stored in memory 632 can include one or more modules each corresponding to a set of instructions. Moreover, processing component 622 is configured to execute instructions to perform the method described above to transmit a synchronous broadcast block.

Device 600 may also include a power supply component 626 configured to perform power management of device 600, a wired or wireless network interface 650 configured to connect device 600 to the network, and an input/output (I/O) interface 658. Device 600 can operate based on an operating system stored in memory 632, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM or the like.

In an exemplary embodiment, an apparatus for transmitting a synchronous broadcast block is provided, comprising:

processor;

a memory for storing processor executable instructions;

Wherein the processor is configured to:

The above processor can also be configured to:

The ratio of the number of time domain symbols occupied by a group of synchronous broadcast blocks to the number of time domain symbols included in 1 ms does not exceed a preset ratio range; the ratio ranges from 50% to 70%.

The above processor can also be configured to:

Multiple simultaneous broadcast blocks in a group are consecutively symbolically.

The above processor can also be configured to:

A synchronous broadcast block occupies 2 time domain symbols or 4 time domain symbols.

The above processor can also be configured to:

When a synchronous broadcast block occupies 4 time domain symbols, for a low frequency band, the set of synchronous broadcast blocks includes two or 4 synchronous broadcast blocks; for a high frequency band, the set of synchronous broadcast blocks includes 4 or 8 Simultaneous broadcast blocks;

A computer readable storage medium, when instructions in the storage medium are executed by a processor of a device, to enable a device to perform the method of transmitting a synchronous broadcast block as described above, the method comprising:

The instructions in the storage medium may further include:

When one synchronous broadcast block occupies 4 time domain symbols, for a low frequency band, the set of synchronous broadcast blocks includes two or 4 synchronous broadcast blocks; for a high frequency band, the set of synchronous broadcast blocks includes 4 or 8 Simultaneous broadcast blocks;

Other embodiments of the invention will be apparent to those skilled in the <RTIgt; The present application is intended to cover any variations, uses, or adaptations of the present invention, which are in accordance with the general principles of the present invention and include common general knowledge or conventional technical means in the art that are not disclosed in the present invention. . The specification and examples are to be considered as illustrative only,

It is to be understood that the invention is not limited to the details of the details of The scope of the invention is limited only by the appended claims.

Claims

A method for transmitting a synchronous broadcast block, comprising:

Detecting whether the current transmission time channel is idle to send a set of synchronous broadcast blocks; the set of synchronous broadcast blocks includes at least two synchronous broadcast blocks;

The beam scan transmits the set of synchronous broadcast blocks when it is detected that the channel is idle at the current transmission time.
The method according to claim 1, wherein the ratio of the number of time domain symbols occupied by a group of synchronous broadcast blocks to the number of time domain symbols included in 1 ms does not exceed a preset ratio range; %-70%.
The method of claim 1 wherein a plurality of synchronized broadcast blocks in a group are consecutively symbolically.
The method of claim 1 wherein one isochronous broadcast block occupies 2 time domain symbols or 4 time domain symbols.
The method according to claim 4, wherein when a synchronous broadcast block occupies 4 time domain symbols, for a low frequency band, said set of synchronous broadcast blocks includes two or four synchronous broadcast blocks; The set of synchronous broadcast blocks includes 4 or 8 synchronous broadcast blocks;

When a synchronous broadcast block occupies 2 time domain symbols, for a low frequency band, the set of synchronous broadcast blocks includes 4 or 8 synchronous broadcast blocks; for a high frequency band, the set of synchronous broadcast blocks includes 8 or 16 Synchronous broadcast blocks.
An apparatus for transmitting a synchronous broadcast block, comprising:

a detecting module, configured to detect whether a channel is idle at a current sending time, to send a set of synchronous broadcast blocks; and the set of synchronous broadcast blocks includes at least two synchronous broadcast blocks;

And a sending module, configured to: when the channel is idle at the current transmission time, the beam scan sends the set of synchronous broadcast blocks.
The apparatus according to claim 6, wherein the ratio of the number of time domain symbols occupied by a group of synchronous broadcast blocks to the number of time domain symbols included in 1 ms does not exceed a preset ratio range; %-70%.
The apparatus of claim 6 wherein a plurality of synchronized broadcast blocks in a group are consecutively symbolically.
The apparatus of claim 6 wherein one isochronous broadcast block occupies 2 time domain symbols or 4 time domain symbols.
The apparatus according to claim 9, wherein when a synchronous broadcast block occupies 4 time domain symbols, for a low frequency band, said set of synchronous broadcast blocks includes two or four synchronous broadcast blocks; The set of synchronous broadcast blocks includes 4 or 8 synchronous broadcast blocks;

When a synchronous broadcast block occupies 2 time domain symbols, for a low frequency band, the set of synchronous broadcast blocks includes 4 or 8 synchronous broadcast blocks; for a high frequency band, the set of synchronous broadcast blocks includes 8 or 16 Synchronous broadcast blocks.
An apparatus for transmitting a synchronous broadcast block, comprising:

processor;

a memory for storing processor executable instructions;

Wherein the processor is configured to:

Detecting whether the current transmission time channel is idle to send a set of synchronous broadcast blocks; the set of synchronous broadcast blocks includes at least two synchronous broadcast blocks;

The beam scan transmits the set of synchronous broadcast blocks when it is detected that the channel is idle at the current transmission time.
A computer readable storage medium having stored thereon computer instructions, wherein the instructions are executed by a processor to implement the methods of claims 1 to 5 above.