CN109475001B

CN109475001B - Method and device for transmitting random access preamble sequence

Info

Publication number: CN109475001B
Application number: CN201710807829.6A
Authority: CN
Inventors: 钱辰; 喻斌; 熊琦
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2017-09-08
Filing date: 2017-09-08
Publication date: 2023-11-24
Anticipated expiration: 2037-09-08
Also published as: CN109475001A

Abstract

The invention relates to the technical field of wireless communication, and provides a method and a device for sending a random access preamble sequence, wherein in the method, a synchronous signal block is detected to obtain reference signal receiving power; determining a target synchronous signal block according to the reference signal receiving power, and acquiring configuration information carried in the target synchronous signal block; determining a random access preamble sequence according to the configuration information; determining the transmitting power of the random access preamble sequence according to the configuration information and the reference signal receiving power; and transmitting the random access preamble sequence on the random access channel carried in the configuration information according to the transmission power. In the invention, the transmitting power of the synchronous signal block and the target receiving power of the preamble sequence are configured, so that the transmitting power of different random access preamble sequences is configured for different synchronous signal blocks with lower expenditure. By adopting the method provided by the invention, higher energy efficiency can be provided, meanwhile, the power of the terminal is saved, the service life of the terminal is prolonged, and the user experience is improved.

Description

Method and device for transmitting random access preamble sequence

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for transmitting a random access preamble sequence.

Background

With the rapid development of the information industry, especially the growing demand from the mobile internet and internet of things (IoT, internet of things), the future mobile communication technology is challenged unprecedented. As can be expected from the international telecommunications union ITU report ITU-R m. the mobile traffic growth will grow approximately 1000 times compared to the 4G age, the number of user equipment connections will also exceed 170 billions, and the number of connected devices will be even more dramatic as the vast number of IoT devices gradually penetrate the mobile communication network. To address this unprecedented challenge, the communications industry and academia have developed a wide range of fifth generation mobile communication technology research (5G), oriented in the 2020 s. The framework and overall goals of future 5G have been discussed in ITU's report ITU-R m, where the requirements of 5G are expected, the application scenario and important performance metrics are specified. Aiming at the new demand in 5G, the report ITU-R M provides information related to the technical trend of 5G, and aims to solve the remarkable problems of remarkable improvement of system throughput, consistency of user experience, expansibility to support IoT, time delay, energy efficiency, cost, network flexibility, support of emerging services, flexible spectrum utilization and the like.

With the rapid development of the information industry, especially the growing demand from the mobile internet and internet of things (IoT, internet of things), the future mobile communication technology is challenged unprecedented. As per the international telecommunications union ITU report ITU-R M [ imt.beyond 2020.traffic ], it is expected that in 2020, mobile traffic will increase approximately 1000 times, and user equipment connections will be over 170 billions, relative to the 4G era in 2010, and the number of connected devices will be even more dramatic as the vast number of IoT devices gradually penetrate the mobile communication network. To address this unprecedented challenge, the communications industry and academia have developed a wide range of fifth generation mobile communication technology research (5G), oriented in the 2020 s. The framework and overall goals of future 5G have been discussed in ITU report ITU-R M [ imt.vision ], where the requirements expectations, application scenarios and important performance metrics of 5G are specified. Aiming at the new demand in 5G, the ITU report ITU-R M [ IMT.FUTURE TECHNOLOGY TRENDS ] provides information related to the technical trend aiming at 5G, aiming at solving the remarkable problems of remarkable improvement of system throughput, consistency of user experience, expansibility to support the time delay of the IoT, energy efficiency, cost, network flexibility, support of emerging services, flexible spectrum utilization and the like.

Compared with the existing LTE system, the 5G is introduced into the system working in a high frequency band to improve the data transmission efficiency and the spectrum utilization rate of the system. To combat significant path loss in high-band wireless channels, wireless communication systems operating in the high-band require multi-beam operation to improve system performance by properly matching the beam-forming gains produced by the beam pairs. Thus, for multi-beam systems, the accuracy of beam pairing will significantly impact system performance.

For multi-beam operating systems operating in the high frequency band, the beam selection for initial access needs to be done by searching for a synchronization signal block. Specifically, there are multiple synchronization signal blocks in the system, and each synchronization signal block uses the same or different downlink transmission beams to transmit downlink signals. The terminal adopts a preset criterion, selects a proper synchronous signal block according to the reference signal receiving power (Reference Signal Received Power, RSRP) of the synchronous signal block, and completes the downlink synchronous process.

Considering that in a 5G system, one downlink beam covers only a part of angles in a sector, the coverage requirements in different downlink beam coverage areas may be different, and the workload may also be different, so the required downlink transmission power may also be different. When different synchronous signal blocks use different transmitting powers, the corresponding transmitting power of the corresponding synchronous signal block needs to be informed in the system information so that the terminal calculates the path loss and the power for transmitting the random access preamble sequence is obtained. Informing the transmit power of each synchronization signal block in the system information would create a large overhead.

How to notify the transmission power of the random access preamble sequence with a small overhead is a problem to be solved in the prior art.

In the prior art, a terminal calculates path loss according to preset base station transmitting power and measured reference signal receiving power, and determines transmitting power of a random access preamble sequence. For the multi-beam operation system in 5G, because the coverage requirements in different beam coverage areas are different, the transmission power requirements of the downlink synchronization signal block are different even for different beam coverage areas in the same sector. At this time, the single downlink transmission power still cannot meet the power transmission requirements in the coverage areas of different beams in the cell, resulting in power waste.

Disclosure of Invention

The invention provides a method and a device for sending a random access preamble sequence, which are used for completing the configuration of different sending powers of different random access preamble sequences by different synchronous signal blocks through lower expenditure, thereby realizing the sending of the random access preamble sequence.

The invention provides a method for transmitting a random access preamble sequence, which comprises the following steps:

detecting the synchronous signal block to obtain reference signal receiving power;

Determining a target synchronous signal block according to the reference signal receiving power, and acquiring configuration information carried in the target synchronous signal block;

determining a random access channel and a random access preamble sequence according to the configuration information, and determining the transmission power of the random access preamble sequence according to the configuration information and the reference signal reception power;

and transmitting the random access preamble sequence on the random access channel according to the transmission power.

Preferably, the determining the target synchronization signal block according to the reference signal received power includes:

selecting a synchronous signal block corresponding to the reference signal receiving power with the maximum value from the reference signal receiving powers as a target synchronous signal block; or alternatively, the first and second heat exchangers may be,

screening synchronous signal blocks corresponding to all the reference signal receiving powers higher than a first preset threshold value from the reference signal receiving powers, and randomly selecting one synchronous signal block from the screened synchronous signal blocks with equal probability as a target synchronous signal block; and if the reference signal received power higher than the first preset threshold value does not exist in the reference signal received powers, selecting the synchronous signal block corresponding to the reference signal received power with the maximum value as the target synchronous signal block.

and calculating the path loss of each synchronous signal block according to the received power of each reference signal and the transmitting power indicated in the configuration information carried in the corresponding synchronous signal block, and selecting a target synchronous signal block according to the path loss.

Preferably, the selecting a target synchronization signal block according to the path loss specifically includes:

selecting a synchronization signal block with the minimum path loss as a target synchronization signal block; or alternatively, the first and second heat exchangers may be,

selecting a synchronous signal block corresponding to a plurality of path loss lower than a second preset threshold value from the path loss, and randomly selecting one synchronous signal block from the plurality of selected synchronous signal blocks with equal probability as a target synchronous signal block; and if no path loss lower than the second preset threshold exists in the path losses, selecting the synchronous signal block with the minimum path loss as a target synchronous signal block.

Preferably, the configuration information is power configuration information, and the determining the transmission power of the random access preamble sequence according to the configuration information and the reference signal received power includes:

Determining the transmitting power of the target synchronous signal block according to the power configuration information;

calculating the path loss of the target synchronous signal block according to the transmitting power of the target synchronous signal block and the receiving power of the reference signal;

and calculating the transmission power of the random access preamble sequence according to the power configuration information and the path loss of the target synchronous signal block.

Preferably, the determining the transmitting power according to the power configuration information includes any one of the following ways:

acquiring the transmitting power of the target synchronous signal block;

the transmit power is determined based on a reference transmit power and a power float parameter.

Preferably, the acquiring the transmission power of the target synchronization signal block includes:

acquiring quantized transmitting power carried in the power configuration information; or alternatively, the first and second heat exchangers may be,

acquiring first index information of the target synchronous signal block carried in the power configuration information; and inquiring a transmitting power mapping list according to the first index information, and acquiring transmitting power corresponding to the first index information.

acquiring a power configuration parameter sequence contained in the power configuration information; the power configuration parameter sequence is a sequence formed by transmitting power information corresponding to each synchronous signal block group in the current power group; determining the transmitting power according to the index information of the target synchronous signal block and the power configuration parameter sequence

acquiring the number of power groups contained in the power configuration information, the index information of the synchronous signal blocks in each power group, the index sequence of the synchronous signal blocks and the transmitting power configuration information corresponding to each power group; wherein, a power group is formed by a plurality of synchronous signal blocks, and the transmitting power configuration information of all synchronous signal blocks in each power group is the same; the synchronous signal block index sequence is a sequence formed by index information of a plurality of synchronous signal blocks using the same transmitting power;

screening out a power group matched with the target synchronous signal block according to the index information of the target synchronous signal block, the index information of the synchronous signal block in each power group and the index sequence of the synchronous signal block;

and determining the transmitting power according to the transmitting power configuration information corresponding to the screened power group.

Preferably, if the number of synchronization signal blocks in each power group is different, the power configuration information further includes the number of synchronization signal blocks in each power group.

Acquiring the number of power groups contained in the power configuration information, index information of the synchronous signal block groups in each power group and transmitting power configuration information corresponding to each synchronous signal block group in each power group; wherein, a power group is composed of a plurality of synchronous signal block groups, and the transmitting power configuration information of all synchronous signal blocks in each synchronous signal block group of each power group is the same;

screening out the synchronous signal block group in the power group matched with the target synchronous signal block according to the index information of the target synchronous signal block and the index information of the synchronous signal block group in each power group;

and determining the transmitting power according to the transmitting power configuration information corresponding to the screened synchronizing signal block group.

acquiring transmitting power configuration information corresponding to a power group contained in the power configuration information; wherein, a power group is composed of a plurality of synchronous signal block groups, and the transmitting power configuration information of all synchronous signal blocks in each synchronous signal block group of each power group is the same;

and determining the transmitting power configuration information corresponding to the power group as the transmitting power of the target synchronous information block.

Preferably, the determining the transmission power according to the reference transmission power and the power floating parameter includes:

acquiring quantized reference transmitting power and second index information carried in the power configuration information;

inquiring a power floating parameter mapping list according to the second index information to obtain a power floating parameter corresponding to the second index information;

and calculating the transmitting power of the target synchronous signal block according to the quantized reference transmitting power and the power floating parameter.

acquiring quantized reference transmitting power and quantized power floating parameters carried in the power configuration information;

and calculating the transmission power of the target synchronous signal block according to the quantized reference transmission power and the quantized power floating parameter.

acquiring second index information of the target synchronous signal block carried in the power configuration information;

And calculating the transmitting power of the target synchronous signal block according to the preset reference transmitting power and the power floating parameter.

acquiring a preconfigured power floating parameter and third index information carried in the power configuration information;

inquiring a reference transmitting power mapping list according to the third index information, and acquiring reference transmitting power corresponding to the third index information;

and calculating the transmitting power of the target synchronous signal block according to the reference transmitting power and the power floating parameter.

acquiring second index information and third index information carried in the power configuration information;

Preferably, the calculating the transmission power of the random access preamble sequence according to the power configuration information and the path loss of the target synchronization signal block includes:

acquiring initial target preamble sequence receiving power information in the power configuration information;

calculating a preamble sequence target receiving power according to the initial target preamble sequence receiving power information;

and calculating the transmitting power of the random access preamble sequence according to the target receiving power of the preamble sequence and the path loss.

Preferably, the method further comprises:

acquiring power control parameters carried in the power configuration information;

and adjusting the target receiving power of the preamble sequence or the transmitting power of the random access preamble sequence according to the power control parameter.

Preferably, the obtaining the power control parameter carried in the power configuration information includes:

acquiring a power control parameter of the target synchronous signal block carried in the power configuration information; or alternatively, the first and second heat exchangers may be,

acquiring fourth index information of the target synchronous signal block carried in the power configuration information; and inquiring a power control parameter mapping list according to the fourth index information, and acquiring a power control parameter corresponding to the fourth index information.

The invention also provides a device for sending the random access preamble sequence, which comprises the following steps:

the detection unit is used for detecting the synchronous signal block to obtain reference signal receiving power;

the first processing unit is used for determining a target synchronous signal block according to the reference signal receiving power and acquiring configuration information carried in the target synchronous signal block;

a second processing unit, configured to determine a random access channel and a random access preamble sequence according to the configuration information, and determine a transmission power of the random access preamble sequence according to the configuration information and a reference signal received power;

and a transmitting unit, configured to transmit the random access preamble sequence on the random access channel according to the transmission power.

Compared with the prior art, the invention has at least the following advantages:

in the invention, the transmitting power of the synchronous signal block and the target receiving power of the preamble sequence are configured, so that the transmitting power of different random access preamble sequences is configured for different synchronous signal blocks with lower expenditure. By adopting the method provided by the invention, higher energy efficiency can be provided for the system, meanwhile, the power of the terminal is saved, the service life of the terminal is prolonged, and the user experience is improved.

Drawings

Fig. 1 is a flow chart of a method for configuring transmission power of a random access preamble sequence provided by the present invention;

fig. 2 is a flow chart of a method for transmitting a random access preamble sequence provided by the present invention;

fig. 3 is a schematic diagram illustrating transmission of a synchronization signal block according to the present invention;

FIG. 4 is a schematic diagram of power configuration in a synchronization signal block set according to the present invention;

fig. 5 is a flow chart of a method for transmitting a random access preamble sequence provided by the present invention;

fig. 6 is a schematic structural diagram of a transmitting device of a random access preamble sequence provided by the present invention.

Detailed Description

The invention provides a method and a device for transmitting a random access preamble sequence, and a detailed description is given below of a specific embodiment of the invention with reference to the accompanying drawings.

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.

It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Aiming at the problem of sending the random access preamble sequence under the multi-beam operation in 5G, the invention provides a method for configuring the sending power of the random access preamble sequence, as shown in figure 1, and the specific flow is as follows.

The terminal detects a downlink synchronous signal and selects a proper synchronous signal block according to a preset rule;

the terminal reads the broadcast channel of the selected synchronous signal block, and obtains the configuration information in the main information block carried by the broadcast channel and the configuration information in the system information block indicated by the main information block;

the terminal calculates the path loss of the selected synchronous signal block according to the power configuration information in the configuration information of the main information block;

The terminal acquires the time-frequency resource position of the random access opportunity according to the random access configuration information contained in the configuration information in the system information, and determines a required random access preamble sequence;

the terminal determines the transmitting power for transmitting the random access preamble sequence according to the calculated path loss;

and the terminal transmits the determined random access preamble sequence by using the transmission power of the calculated random access preamble sequence on the determined random access occasion.

The random access configuration information at least comprises random access channel configuration information which is used for indicating time-frequency resources of random access occasions corresponding to different synchronous signal blocks. Meanwhile, the random access configuration information also comprises format information of the random access preamble sequence, which is used for indicating the structure of the random access preamble sequence and the structure of the random access opportunity. The random access configuration information also comprises power configuration information in the random access process, such as target received preamble sequence power, power climbing interval and the like.

In addition, in the above description, the acquiring of the configuration information (including acquiring the random access configuration information and acquiring the power configuration information) may be performed in parallel; the determination of the time-frequency resources, the preamble sequence and the transmit power may also be performed in parallel.

Meanwhile, the method provided by the invention is also suitable for determining the power when the terminal initiates the retry because the random access attempt fails. Specifically, if the terminal finds that the random access attempt fails, its behavior can be briefly described as follows:

the terminal determines a random access opportunity time-frequency resource and a random access preamble sequence resource which are selected by the random access attempt according to the configuration information;

the terminal determines the power level of the random access attempt according to the power level of the previous random access process;

the terminal transmits the determined random access preamble sequence using the determined transmit power level at the selected random access occasion.

It should be noted that, when determining the random access opportunity, the terminal may refer to the last measurement result to determine an appropriate synchronization signal block. If the corresponding random access time is determined, the path loss is recalculated according to the transmitting power configuration of the synchronous signal block and the measuring result of the synchronous signal block, and the transmitting power of the random access preamble sequence is determined according to the transmitting power configuration of the synchronous signal block. In determining the transmission power of the preamble sequence, a retransmission count counter or a power ramp-up counter may be referred to for determining the transmission power of the random access preamble sequence.

Based on the above configuration method of the transmission power of the random access preamble sequence provided by the present invention, the following describes the transmission method of the random access preamble sequence specifically, as shown in fig. 2, including:

step 201, detecting the synchronization signal block to obtain the reference signal received power.

Step 202, determining a target synchronization signal block according to the reference signal received power, and obtaining configuration information carried in the target synchronization signal block.

The determining the target synchronization signal block according to the reference signal received power includes any one of the following steps:

screening synchronous signal blocks corresponding to all the reference signal receiving powers higher than a first preset threshold value from the reference signal receiving powers, and randomly selecting one synchronous signal block from the screened synchronous signal blocks with equal probability as a target synchronous signal block; if the reference signal received power higher than the first preset threshold value does not exist in the reference signal received power, selecting a synchronous signal block corresponding to the reference signal received power with the maximum value as a target synchronous signal block; or alternatively, the first and second heat exchangers may be,

Further, the selecting the target synchronization signal block according to the path loss may include two ways:

Step 203, determining a random access channel and a random access preamble sequence according to the configuration information, and determining the transmission power of the random access preamble sequence according to the configuration information and the reference signal received power.

In this step, the configuration information is power configuration information, and determining the transmission power of the random access preamble sequence according to the configuration information and the reference signal received power includes:

Further, the determining the transmitting power according to the power configuration information includes any one of the following ways:

1) Acquiring the transmitting power of the target synchronous signal block;

2) The transmit power is determined based on a reference transmit power and a power float parameter.

The following describes the above-described modes, respectively.

Aiming at the mode 1)

The obtaining the transmitting power of the target synchronous signal block includes:

and acquiring quantized transmitting power carried in the power configuration information.

Or alternatively, the first and second heat exchangers may be,

acquiring a power configuration parameter sequence contained in the configuration parameters; the power configuration parameter sequence is a sequence formed by transmitting power information corresponding to each synchronous signal block group in the current power group; and determining the transmitting power according to the index information of the target synchronous signal block and the power configuration parameter sequence.

Or alternatively, the first and second heat exchangers may be,

And if the numbers of the synchronous signal blocks in the power groups are different, the power configuration information also comprises the numbers of the synchronous signal blocks in the power groups.

Or alternatively, the first and second heat exchangers may be,

For mode 2), it may further specifically include the following four methods:

the determining the transmission power according to the reference transmission power and the power floating parameter comprises the following steps:

(1) Acquiring quantized reference transmitting power and second index information carried in the power configuration information;

(2) Acquiring quantized reference transmitting power and quantized power floating parameters carried in the power configuration information;

(3) Acquiring second index information of the target synchronous signal block carried in the power configuration information;

(4) Acquiring a preconfigured power floating parameter and third index information carried in the power configuration information;

(5) Acquiring second index information and third index information carried in the power configuration information;

In this step, the method further includes the process of calculating the transmission power of the random access preamble sequence according to the power configuration information and the path loss of the target synchronization signal block, where the process includes:

Wherein, still include:

Further, the obtaining the power control parameter carried in the power configuration information includes:

And step 204, transmitting the random access preamble sequence on the random access channel according to the transmission power.

Based on the above method for transmitting a random access preamble sequence provided by the present invention, several specific embodiments are described below in detail.

Example 1

In this embodiment, a method for configuring the transmission power of a random access preamble sequence will be described with reference to a specific system. In this embodiment, the system completes the initial access process by sending the downlink synchronization signal block. Specifically, one or more downlink synchronization signal blocks are configured in the system, and each downlink synchronization signal block is composed of a primary synchronization signal, a secondary synchronization signal and a broadcast channel. For systems operating in multi-beam operation, the base station configures a plurality of synchronization signal blocks. Different synchronization signal blocks are transmitted using the same or different downlink transmit beams. The temporally adjacent or proximate synchronization signal blocks form a synchronization signal block group. A plurality of synchronization signal block sets capable of covering all possible downlink transmit beam directions constitute a synchronization signal block set, as shown in fig. 3.

In the example shown in fig. 3, adjacent synchronization signal blocks use downlink transmission beams that are adjacent in direction. In an actual system, downlink transmission beams with non-adjacent directions can be used for the synchronous signal blocks adjacent in time according to the network deployment condition.

The broadcast channel in the synchronization signal block transmits a main information block carrying information necessary for the terminal to access the network, and the main information block carries a system information block carrying the remaining minimum system information (Remaining Minimum System Information, RMSI). The configuration information of the terminal for random access, including random access channel configuration information, random access preamble sequence pool configuration information, and some other necessary configuration information, is carried in RMSI or OSI (Other System Information ).

The random access channel is composed of a plurality of random access opportunities, one random access opportunity is used for transmitting a random access preamble sequence, and different random access opportunities correspond to different synchronous signal blocks and are used for indicating downlink transmission beams required by the base station. Different synchronization signal blocks may correspond to the same or different random access occasions. If the multiple synchronization signal blocks correspond to the same random access opportunity, a random access preamble sequence grouping mode needs to be adopted to distinguish different synchronization signal blocks.

The information carried in the RMSI or OSI to which different synchronization signal blocks point is the same, i.e. the RMSI or OSI needs to carry configuration information of all random access opportunities.

Different synchronization signal blocks may employ different transmit powers to accommodate coverage requirements in different directions. When the terminal transmits the random access preamble sequence, the path loss in the downlink beam coverage area is calculated by the difference between the reference signal receiving power (such as the reference signal receiving power of the primary synchronization signal or the secondary synchronization signal) of the received synchronization signal block and the transmitting power of the base station synchronization signal block, so as to calculate the transmitting power of the random access preamble sequence. Therefore, when different synchronous signal blocks adopt different transmitting powers, the base station needs to configure and inform the transmitting power, so that the terminal can calculate the path loss. The possible transmit power notification modes are as follows:

1. the transmit power levels used by the different synchronization signal blocks are directly configured and signaled in RMSI or OSI. Specifically, the quantized transmission power is used for configuring and notifying the transmission power of the synchronous signal block. As a specific example, the number of bits k for quantizing the transmission power is preset, that is, the transmission power of each synchronization signal block is expressed using k bits. Assuming that M synchronization signal blocks are configured in the system, the transmission power of each of the M synchronization signal blocks is notified in RMSI or OSI, and the configuration and notification are performed using Mk bits. I.e. defining the power configuration parameters as:

-power configuration parameters: [ Power 0, power 1, …, power M-1]

Wherein, the power i (i is more than or equal to 0 and less than or equal to M-1) is the transmitting power of the ith synchronous signal block and is expressed by k bits.

The notification accuracy in this way is related to the number of quantization bits k, the larger k, the greater the overhead required to notify the transmission power per synchronization signal block, but the higher the transmission power accuracy.

In addition to directly configuring and notifying the quantized transmit power level, another configuration and notification method is to configure and notify the transmit power level by using an index table. One possible look-up table is shown in table 1.

Table 1: transmit power configuration

Index	Power configuration (dBm)
		0	48
1	47
		2	46
3	45
		…	…

In the example shown in table 1, the terminal determines the transmission power of the synchronization signal block by using the relation between the index and the power configuration, and calculates the path loss corresponding to the synchronization signal block according to the transmission power.

2. If the transmission power difference between different synchronous signal blocks is not large, the transmission power between different synchronous signal blocks can be notified and configured in a power transmission reference plus power floating mode. Specifically, the reference transmit power is configured in RMSI or OSI, and an m-bit configuration is adopted. Further, power float configuration information is configured in RMSI or OSI for informing a power float parameter of the transmission power of each synchronization signal block with respect to the reference transmission power. This part is used to inform that the power floating parameters with respect to the reference transmit power are not large, considering that in general the floating of the transmit power of the different synchronization signal blocks is not too large. For example, 2 to 3 bits are used to signal the power float relative to the reference transmit power as shown in the following table:

Table 2: power float parameter configuration

The example shown in table 2 is a notification that uses 2 bits for power float. It should be noted that each synchronization signal block needs to use the 2-3 bits to configure the power floating parameter of the synchronization signal block. The overhead for informing the power float parameter configuration is thus 2-3 bits multiplied by the number of synchronization signal blocks. The overhead for informing the transmission power of the synchronization signal block is the sum of the overhead of the above power floating parameter configuration and the configuration bit of the reference transmission power.

For the reference transmitting power, a simpler notifying mode is to define several preset transmitting powers, and configure and notify the reference transmitting power in an index mode. An index representation is shown in table 3.

Table 3: reference transmit power configuration

And the terminal calculates the downlink transmitting power of the corresponding synchronous signal block according to the received reference transmitting power and the power floating parameter of the corresponding synchronous signal block. For example, if the reference transmission power received by the terminal is 46dBm and the power floating parameter corresponding to the synchronization signal block selected by the terminal is 1dB, the transmission power of the synchronization signal block is 46 dbm+1db=47 dBm. The terminal will calculate the path loss and thus the transmit power for the random access preamble sequence based on the transmit power.

In addition, a specific example of the method is a fixed reference transmission power, which is known to both the base station and the terminal, so that notification and configuration are not required. Only the power float parameter needs to be configured. The configuration of the power floating parameters may be such that the index table is used to notify the index of the power floating parameters, for example, with reference to the above-described table 2.

3. The base station groups the synchronous signal blocks with the same or approximate downlink transmission power and sends the synchronous signal blocks on adjacent time-frequency resource blocks. The synchronous signal blocks on adjacent time-frequency resource blocks adopt approximately the same transmitting power, namely the synchronous signal blocks are grouped, different synchronous signal blocks in the group adopt approximately the same transmitting power, and synchronous signal blocks among groups can adopt different or approximately different transmitting powers. It should be noted that, in the configuration of the synchronization signal blocks, there is a configuration manner of the synchronization signal block groups, so that a group of synchronization signal blocks using approximately the same transmission power may be configured in one synchronization signal block group, or several groups of synchronization signal blocks may be configured in the same synchronization signal block group, so as to facilitate the configuration. The two examples described above are shown in fig. 4.

In fig. 4, synchronization signal blocks having approximately equal transmission power are allocated to be transmitted on adjacent time-frequency resources, and are grouped into power groups. Another possibility is that more synchronization signal blocks with approximately the same transmit power are used in one power group, and at this time, synchronization signal blocks in multiple synchronization signal block groups may be collected as one power group.

The transmit power of the synchronization signal block and the corresponding power group are uniformly configured within the power group in RMSI or OSI. The configuration notification includes a configuration mode of the power group. One possible configuration and notification manner is to configure and notify the number of power groups, the synchronization signal block index contained in each power group, and the configuration of the downlink transmit power in each power group.

The configuration parameters in each power group are: { synchronization signal block index sequence, transmit power configuration information }. The index sequence of the synchronous signal blocks is a sequence formed by indexes corresponding to synchronous signal blocks using the same transmitting power in the power group. The index of the synchronization signal block is a logical index of the synchronization signal block, or a synchronization signal block index characterized by a time index, such as a subframe index, a slot index, or a mini slot index. The configuration of the transmitting power can adopt the two configuration modes, namely the transmitting power of each power group can be directly quantized and notified in a configuration way; or configuring and informing the reference transmit power, and the power float parameter of each power group with respect to the reference transmit power.

If the numbers of the synchronization signal blocks contained in different power groups are different, the number information of the synchronization signal blocks contained in the power groups needs to be increased in the configuration parameters of the power groups. At this time, the configuration parameters of each power group are: { number of synchronization signal blocks, synchronization signal block index sequence, transmit power configuration information }.

If the definition of the power group matches the definition of the synchronization signal block group, that is, the synchronization signal block group includes a complete one, the transmission power can be configured for the synchronization signal block group. The configuration and notification of the transmit power may take two forms as described above.

If a power group includes a plurality of synchronization signal block groups, the synchronization signal block index in the power group configuration parameter can be modified to be a synchronization signal block group index, and the transmission power levels of the plurality of synchronization signal block groups are configured.

The other power group notification and configuration mode is to configure and notify only the transmitting power configuration information of each synchronizing signal block group in the power group, namely notify the power configuration parameter sequence, and the terminal determines the selected transmitting power configuration mode according to a certain rule. One possible way is that the terminal determines the corresponding configuration parameters in the power configuration parameter sequence according to a preset criterion and the number of the synchronization signal block groups or the number of the synchronization signal blocks. Specifically, the power configuration parameter sequence in RMSI or OSI is { P } ₀ ,…,P _N-1 There are N elements in the sequence, each element representing a power configuration parameter. Index I for synchronization signal block _SS Corresponding power configuration parameters in the notification power configuration parameter sequence are indexed as

n＝mod(I _ss ,N)

I.e. the power configuration parameter selected by the terminal is P _n 。

Another power configuration parameter is selected in such a way that the block index is I for the synchronization signal _SS Corresponding power configuration parameters in the notification power configuration parameter sequence are indexed as

In this embodiment, the terminal-side behavior can be briefly described as follows:

and the terminal performs an initial access process, detects the synchronous signal block and reads the content of the main information block carried by the broadcast channel. And determining a proper synchronous signal block according to the detected reference signal receiving power and a preset criterion.

And reading the RMSI or OSI indicated by the main information block, obtaining the random access channel configuration information therein, and determining the time-frequency resource of the random access opportunity and the random access preamble sequence according to the random access channel configuration information.

And acquiring the transmitting power of the selected synchronous signal block according to the synchronous signal block power configuration information in RMSI or OSI, and calculating the path loss according to the measured reference signal receiving power of the synchronous signal block. The path loss calculation method is as follows: pathloss (dB) =transmit power (dBm) -reference signal receive power (dBm).

The terminal determines the transmission power of the random access preamble sequence according to the path loss, and transmits the determined random access preamble sequence in the random access channel determined in the previous step.

The above-described flow can be described with reference to fig. 5. Wherein the predetermined criteria for determining a suitable synchronization signal block may include: 1. the synchronization signal block is selected according to the reference signal received power of the synchronization signal block. For example, a synchronization signal block with the largest reference signal reception power is selected, or one synchronization signal block is randomly selected with equal probability among synchronization signal blocks with reference signal reception power higher than a threshold value according to a predetermined threshold value or a threshold value configured by a base station, and if the reference signal reception power of no synchronization signal block is higher than the threshold value, the synchronization signal block with the largest reference signal reception power is selected. 2. And calculating the path loss of the synchronous signal block according to the reference signal receiving power of the synchronous signal block and the main information block in a broadcast channel or the transmitting power information of the synchronous signal block carried in RMSI or OSI, and selecting the synchronous signal block according to the path loss. For example, a synchronization signal block having the smallest path loss is selected, or a synchronization signal block having a path loss lower than a predetermined threshold is selected based on the threshold, and one synchronization signal block is selected with equal probability. If the path loss of no synchronization signal block is below the threshold, the synchronization signal block with the minimum path loss is selected.

In this embodiment, the transmission power information of the synchronization signal block may be transmitted in OSI.

Example two

In this embodiment, a method for configuring the transmission power of a random access preamble sequence will be described with reference to a specific system. In this embodiment, the purpose of informing different synchronization signal blocks of having different transmission powers is achieved by configuring the reference transmission power of the preamble sequence, so that the terminal can select a suitable transmission power of the random access preamble sequence when selecting a specific synchronization signal block.

In particular, the transmit power configuration of the synchronization signal block is transmitted in RMSI or OSI. The transmit power configuration may be a coarse configuration. Meanwhile, the random access configuration information carries target receiving power configuration for random access time. By adjusting the transmitting power of the synchronization signal block and the target receiving power of the random access opportunity, the base station can configure different synchronization signal blocks to adopt different transmitting powers, and meanwhile, ensure that the terminal can correctly estimate the path loss of different synchronization signal blocks.

Specifically, configuration information of the transmission power of the synchronization signal block is transmitted in RMSI or OSI. The possible ways are:

1. The transmit power of each synchronization signal block is configured and signaled in a quantized or indexed manner. The transmission power of each synchronization signal block may be directly notified, or the reference transmission power may be notified by a preset or notification in RMSI or OSI, and the power float parameter of each synchronization signal block may be notified. The reference transmission power may be determined in a preset manner, or may be configured in RMSI or OSI.

2. The synchronous signal blocks with similar transmitting power are divided into a group, and the transmitting power of the synchronous signal blocks in the group is uniformly configured and informed in a grouping way. The synchronous signal blocks in the group are uniformly configured, the configuration mode can be configured by directly notifying quantized transmitting power, or notifying the transmitting power in the group by adopting an index table, or configuring transmitting power by adopting a configuration mode of reference transmitting power and power floating parameters, wherein the reference transmitting power can be determined by adopting a preset mode, and can also be configured in RMSI or OSI.

In mode 2, the configuration of the packet may be the same as that used in the embodiment. The method is that the synchronous signal blocks are grouped according to the configuration of the synchronous signal block group, namely the synchronous signal blocks which can adopt the same transmitting power configuration are placed at adjacent positions to form the synchronous signal block group. In this manner, each synchronization signal block configuration is adapted to the transmit power of each synchronization signal block in the set of synchronization signal blocks.

And configuring different initial target preamble sequence receiving powers for random access time corresponding to different synchronous signal blocks in the random access configuration information, calculating the preamble sequence receiving target power according to the initial target preamble sequence receiving power, and calculating the transmitting power of the random access preamble sequence by combining the path loss. Specifically, the configuration of the initial target preamble sequence received power is performed in combination with the actual transmit power and the transmit power configured in RMSI or OSI. A simple example is that the base station expects a preamble reception power of-110 dBm and the transmission power of the synchronization signal block configured in RMSI or OSI is 45dBm, but because the configuration of the transmission power is rough, the transmission power of the synchronization signal block selected by the terminal is different from the transmission power configured in RMSI or OSI and is 1dB higher than the transmission power configured, and therefore, when the initial target preamble reception power is configured, it is configured to-111 dBm, i.e., the initial target preamble reception power configured is 1dB lower than the expected preamble reception power.

It should be noted that, the random access occasions corresponding to different synchronization signal blocks may configure different initial target preamble sequence receiving powers. Specifically, one possible configuration manner is to configure an initial target preamble sequence received power sequence according to the index sequence of the synchronization signal block, where each element in the sequence represents a configuration value of the initial target preamble sequence received power of the random access opportunity corresponding to the synchronization signal block of the corresponding index. For example, for a system with 8 synchronization signal blocks, when configuring the initial target preamble sequence received power sequence of the random access opportunity corresponding to the 8 synchronization signal blocks, configuration should be performed A sequence comprising 8 elements, for example: the initial target preamble sequence received power is: { a ₀ ,a ₁ ,a ₂ ,a ₃ ,a ₄ ,a ₅ ,a ₆ ,a ₇ }. Wherein a is _i The unit is dBm, which represents the initial target preamble sequence receiving power configured by the random access time corresponding to the ith synchronous signal block, i is more than or equal to 0 and less than or equal to 7.

For the case that the plurality of synchronization signal blocks correspond to the same random access opportunity, the configuration of the initial target preamble sequence receiving power can still be performed according to the above manner. Another configuration mode is to configure the initial target preamble sequence receiving power for the random access opportunity. Specifically, when configuring the time-frequency resource of the random access opportunity, the initial target preamble sequence receiving power of each random access opportunity is configured at the same time. Or carrying out the numbering index of the random access time according to a preset rule, and configuring the target preamble sequence receiving power sequence according to the number of the random access time, wherein the elements in the sequence are the configuration of the target preamble sequence receiving power of the corresponding random access time. A simple example is that the base station configures 8 random access opportunities, the configured target preamble sequence has a received power sequence length of 8 and a sequence { b } ₀ ,b ₁ ,b ₂ ,b ₃ ,b ₄ ,b ₅ ,b ₆ ,b ₇ And b is }, where _i The unit is dBm, which represents the initial target preamble sequence receiving power configured by the ith random access occasion, i is more than or equal to 0 and less than or equal to 7.

Similar to the manner of grouping the synchronization signal blocks and configuring the transmission power in the first embodiment, the manner of grouping the synchronization signal blocks or the random access opportunity may also be used for configuring the transmission power. Specifically, the synchronization signal blocks configured with approximately the same transmission power or approximately the same initial target preamble sequence reception power are configured in adjacent positions, and the grouping manner is configured in RMSI or OSI, and the initial target preamble sequence reception power of each group. One possible way is to configure the synchronization signal block grouping by means of an index sequence. One possible way is to send the packets and the information of the index sequence within each packet in RMSI or OSI. A simple example is that the information required for the packet information includes:

number of packets

-group 1: { intra-packet synchronization signal block index };

-group 2: { intra-packet synchronization signal block index };

…

-group n: { intra-packet synchronization block index }.

Another grouping mode is to only notify the transmitting power configuration of each grouping, namely notify the power configuration parameter sequence, and the terminal determines the selected transmitting power configuration mode according to a certain rule. One possible way is that the terminal determines the corresponding configuration parameters in the power configuration parameter sequence according to a preset criterion and the number of packets or the number of synchronization signal blocks. Specifically, the power configuration parameter sequence in RMSI or OSI is { P } ₀ ,…,P _N-1 The sequence of N elements, each element representing a power configuration parameter. Index I for synchronization signal block _SS Corresponding power configuration parameters in the power configuration parameter sequence are indexed as

n＝mod(I _ss ,N)

I.e. the power configuration parameter selected by the terminal is P _n 。

Another power configuration parameter is selected in such a way that the block index is I for the synchronization signal _SS Corresponding power configuration parameters in the power configuration parameter sequence are indexed as

The grouping scheme and the power notification and configuration scheme described above may be used in combination. A simple example is that the configuration of the transmission power of the synchronization signal block group is performed by the synchronization signal block group, that is, each synchronization signal block in the same synchronization signal block group adopts the same transmission power configuration; meanwhile, the configuration of the initial target preamble sequence receiving power of the synchronization signal block or the further grouping is notified and configured inside the synchronization signal block group.

When the method provided in this embodiment is adopted, the behavior of the terminal side may be briefly described as follows:

and the terminal performs an initial access process, detects the synchronous signal block and reads the content of the main information block carried by the broadcast channel. And determining a proper synchronous signal block according to the detected reference signal receiving power and a predetermined criterion.

And the terminal calculates the target receiving power of the preamble sequence according to the configuration information of the initial target preamble sequence receiving power in the random access configuration information, the information of a random access power ramp-up counter and the like. And combining the calculated path loss to obtain the transmitting power of the preamble sequence. With this transmission power, the determined random access preamble sequence is transmitted in the random access channel determined in the previous step.

Wherein the predetermined criteria for determining a suitable synchronization signal block may include: 1. the synchronization signal block is selected according to the reference signal received power of the synchronization signal block. For example, a synchronization signal block with the largest reference signal reception power is selected, or one synchronization signal block is randomly selected with equal probability among synchronization signal blocks with reference signal reception power higher than a threshold value according to a predetermined threshold value or a threshold value configured by a base station, and if the reference signal reception power of no synchronization signal block is higher than the threshold value, the synchronization signal block with the largest reference signal reception power is selected. 2. And calculating the path loss of the synchronous signal block according to the reference signal receiving power of the synchronous signal block and the main information block in a broadcast channel or the transmitting power information of the synchronous signal block carried in RMSI or OSI, and selecting the synchronous signal block according to the path loss. For example, a synchronization signal block having the smallest path loss is selected, or a synchronization signal block having a path loss lower than a predetermined threshold is selected based on the threshold, and one synchronization signal block is selected with equal probability. If the path loss of no synchronization signal block is below the threshold, the synchronization signal block with the minimum path loss is selected.

Further, the preamble sequence target received power is calculated as follows:

PREAMBLE_RECEIVED_TARGET_POWER＝preambleInitialReceivedTarg etPower_k+DELTA_PREAMBLE+(POWER_RAMPING_COUNTER–1)*power RampingStep；

the preamble_received_target_power is the calculated PREAMBLE sequence TARGET RECEIVED POWER, the preamble_received_target_power_k is the initial TARGET PREAMBLE sequence RECEIVED POWER configured in the selected kth synchronization signal block, delta_preamble is a POWER control parameter related to the PREAMBLE sequence format, power_ramp_counter is a POWER ramp COUNTER for recording the number of POWER ramp-ups, and powerramp step is POWER ramp compensation and configured in random access configuration information.

After obtaining the target receiving power of the preamble sequence, calculating the transmitting power for transmitting the random access preamble sequence according to the maximum transmitting power limit and the power loss, wherein the transmitting power is as follows:

P _PRACH ＝min{P _CMAX ,PREAMBLE_RECEIVED_TARGET_POWER+PL _k }[dBm]

wherein P is _CMAX PL, the maximum transmit power of a terminal _k The path loss of the kth synchronization signal block is calculated.

The random access configuration information (including the random access channel configuration information, the preamble sequence resource, and the initial target preamble sequence received power configuration information) in this embodiment is transmitted in the medium access control (Media Access Control, MAC) layer. After the MAC calculates the target preamble sequence receiving power, the target preamble sequence receiving power is transmitted to the physical layer, and the physical layer calculates the final transmitting power for transmitting the random access preamble sequence.

For the case that the power ramp-up counter is greater than 1, that is, for the case that the previous random access attempt fails, the random access procedure attempt is restarted, it is necessary to determine whether to switch the random access opportunity time-frequency resource according to the last measurement result. In particular, the terminal determines whether the currently selected synchronization signal block still meets a predetermined synchronization signal block selection criterion based on the last measurement result. For example, a predetermined threshold is set, and if the reference signal received power is below the threshold, the synchronization signal block is considered to be no longer appropriate, and the synchronization signal block is reselected according to the aforementioned criteria; or a predetermined criterion is set, and if the calculated path loss is higher than the threshold value, the synchronization signal block is considered to be no longer suitable, and the synchronization signal block is reselected according to the predetermined criterion.

If the synchronization signal block is re-selected at the time of random access re-try, the time-frequency resource and the preamble sequence resource of the random access opportunity are re-selected according to the configuration information (including the random access configuration information and the transmission power configuration information) of the synchronization signal block, the transmission power of the random access preamble sequence is re-calculated, and the preamble sequence is transmitted on the re-selected random access opportunity by using the re-calculated transmission power of the random access preamble sequence.

In this embodiment, the transmission power information of the synchronization signal block, the random access configuration information such as the random access configuration information, and the like may be transmitted in OSI.

Example III

In this embodiment, a method for configuring the transmission power of a random access preamble sequence will be described with reference to a specific system. In this embodiment, the power control parameter is configured to adjust the transmission power of the random access opportunity corresponding to the synchronization signal blocks having different transmission powers.

One possible implementation manner is that the random access configuration information carries power control parameters, and synchronous signal blocks with different transmitting powers are configured with different power control parameters for adjusting path loss calculation of different random access occasions.

Specifically, the random access configuration information carries a power control parameter for adjusting the transmission power of the random access preamble sequence. In this embodiment, the synchronization signal block transmit power indication may still be sent in RMSI or OSI, for example, in the manner employed in the previous embodiments. In the present embodiment, the indication of the transmission power of the synchronization signal block may be configured coarsely. Such as an indication using only two bits for the transmit power of the synchronization signal block, or the like, or a transmit power configuration and indication of the synchronization signal block is signaled within a larger packet.

The initial target preamble sequence receiving power parameter carried in the random access configuration information may still be configured according to the synchronization signal block, the synchronization signal block packet or the random access opportunity packet as described in the second embodiment. Alternatively, a coarser configuration may be used, such as a configuration with a larger quantization interval or a configuration with more synchronization signal blocks in the packet.

Meanwhile, in the random access configuration information, the power configuration parameters are carried. The parameter may be configured from synchronization signal block to synchronization signal block, i.e. different synchronization signal block configurations may be the same or different power configuration parameters. The configuration may be performed by means of an index table. A simple example is shown in table 4.

Table 4: power control parameter indication

The index table terminal and the base station are known, the base station configures corresponding power control parameters by notifying indexes, and the terminal obtains the power control parameters corresponding to the corresponding indexes in a table look-up mode.

In another configuration mode, the configuration of the power control parameters is performed by adopting a direct quantization mode, namely, the quantized power control parameters are quantized by adopting a certain quantization interval, and the quantized power control parameters are configured.

The configuration parameters may be transmitted in RMSI or OSI or random access configuration information in the form of a sequence of parameters. I.e. a sequence of parameters of length consistent with the number of synchronization signal blocks is established, wherein each element represents a power control parameter of the corresponding indexed synchronization signal block configuration. A simple example is to establish a parameter sequence of length 8 for a system with 8 sync signal blocks: [ c ] ₀ ,…,c ₇ ]Wherein c _i And i is more than or equal to 0 and less than or equal to 7, which is the power control parameter of the ith synchronous signal block.

The configuration of each synchronization signal block may cause a large signaling overhead, and besides the independent configuration of the power control parameters by the synchronization signal blocks, another possibility is to group the synchronization signal blocks and configure the power control parameters in a grouping manner. The grouping may be performed in the manner described in the first or second embodiment.

The parameters added in this embodiment may be used to calculate the target received power at the MAC layer or transferred to the physical layer for directly adjusting the transmit power of the random access preamble sequence.

If the calculation of the target received power is performed at the MAC layer, the configuration information provided in RMSI or OSI includes a target received power adjustment parameter for adjusting the target received power calculated by the MAC layer, thereby indirectly adjusting the path loss calculated by the terminal. Specifically, assuming that the target received Power adjustment parameter is represented by adjust_preamble_power, the target received Power calculation formula of the MAC is:

PREAMBLE_RECEIVED_TARGET_POWER＝preambleInitialReceivedTarg etPower+DELTA_PREAMBLE+(POWER_RAMPING_COUNTER–1)*powerRa mpingStep+Adjust_Preamble_Power；

In the above formula, the parameter preamble early receivedtargetpower may be a synchronization signal block-by-synchronization signal block notification, or may be configured and notified according to a synchronization signal block packet; likewise, the parameter adjust_preamble_power may be notified on a synchronization signal block-by-synchronization signal block basis, or may be configured and notified according to a synchronization signal block packet. And calculating the target receiving power of the preamble sequence through the parameters, transmitting the target receiving power to a physical layer through a MAC layer, and calculating the transmitting power of the random access preamble sequence by combining the path loss obtained through calculation.

If the transmission power of the random access preamble sequence is adjusted in the physical layer, the configuration information provided in RMSI or OSI includes a preamble sequence transmission power adjustment parameter, which needs to be transferred to the physical layer through a higher layer, and the physical layer adjusts the transmission power of the random access preamble sequence. Specifically, the target received power of the preamble sequence calculated by the MAC layer is transferred to the physical layer, and the physical layer calculates the path loss according to the measurement result, the higher layer transfer or the preset transmission power of the synchronization signal block, and calculates the transmission power of the random access preamble sequence according to the power adjustment parameter. The specific formula is described as follows:

P _PRACH ＝min{P _CMAX ,PREAMBLE_RECEIVED_TARGET_POWER+PL _k

+δ _k }[dBm]

wherein delta _k Power adjustment parameters configured for the kth synchronization signal block. The above assumes that the terminal selects the kth synchronization signal block and performs a random access procedure on the corresponding random access occasion.

In this embodiment, the behavior of the terminal may be similar to that of the foregoing embodiment, and may be briefly described as follows:

And the terminal calculates the target receiving power of the preamble sequence according to the configuration information of the initial target preamble sequence receiving power in the random access configuration information, the information of a random access power ramp-up counter and the like. And combining the calculated path loss to obtain the transmission power of the random access preamble sequence. With this transmission power, the determined random access preamble sequence is transmitted in the random access channel determined in the previous step.

The invention also provides a device for sending the random access preamble sequence, as shown in fig. 6, comprising:

a detecting unit 61 for detecting the synchronization signal block to obtain a reference signal received power;

a first processing unit 62, configured to determine a target synchronization signal block according to the reference signal received power, and acquire configuration information carried in the target synchronization signal block;

a second processing unit 63, configured to determine a random access channel and a random access preamble sequence according to the configuration information, and determine a transmission power of the random access preamble sequence according to the configuration information and a reference signal received power;

a transmitting unit 64, configured to transmit the random access preamble sequence on the random access channel according to the transmission power.

Based on the method and the device provided by the invention, the situation that different transmitting beams (corresponding to different synchronous signal blocks) in the 5G multi-beam operation system adopt different transmitting powers can be adapted, and the configuration of different transmitting powers can be completed with lower signaling overhead, so that the flexibility of the system and the experience of the terminal are improved.

It will be understood by those within the art that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. Those skilled in the art will appreciate that the computer program instructions can be implemented in a processor of a general purpose computer, special purpose computer, or other programmable data processing method, such that the blocks of the block diagrams and/or flowchart illustration are implemented by the processor of the computer or other programmable data processing method.

The modules of the device can be integrated into a whole or can be separately deployed. The modules can be combined into one module or further split into a plurality of sub-modules.

Those skilled in the art will appreciate that the drawing is merely a schematic representation of one preferred embodiment and that the modules or processes in the drawing are not necessarily required to practice the invention.

Those skilled in the art will appreciate that modules in an apparatus of an embodiment may be distributed in an apparatus of an embodiment as described in the embodiments, and that corresponding changes may be made in one or more apparatuses different from the present embodiment. The modules of the above embodiments may be combined into one module, or may be further split into a plurality of sub-modules.

The above-described inventive sequence numbers are merely for the purpose of description and do not represent the advantages or disadvantages of the embodiments.

The foregoing disclosure is merely illustrative of some embodiments of the present invention, and the present invention is not limited thereto, as modifications may be made by those skilled in the art without departing from the scope of the present invention.

Claims

1. A method performed by a terminal in a wireless communication system, comprising:

Determining a target synchronous signal block according to the reference signal receiving power, and acquiring configuration information carried in the target synchronous signal block, wherein the configuration information comprises power configuration information;

transmitting the random access preamble sequence on the random access channel according to the transmission power;

wherein, the determining the sending power of the random access preamble sequence according to the configuration information and the reference signal receiving power includes:

2. The method of claim 1, wherein the determining the target synchronization signal block from the reference signal received power comprises:

3. The method of claim 1, wherein the determining the target synchronization signal block from the reference signal received power comprises:

4. The method of claim 3, wherein the selecting the target synchronization signal block according to the path loss specifically comprises:

5. The method according to any of claims 1 to 4, wherein said determining a transmit power from said power configuration information comprises any of:

acquiring the transmitting power of the target synchronous signal block;

6. The method of claim 5, wherein the obtaining the transmit power of the target synchronization signal block comprises:

7. The method of claim 5, wherein the obtaining the transmit power of the target synchronization signal block comprises:

acquiring a power configuration parameter sequence contained in the power configuration information; the power configuration parameter sequence is a sequence formed by transmitting power information corresponding to each synchronous signal block group in the current power group; and determining the transmitting power according to the index information of the target synchronous signal block and the power configuration parameter sequence.

8. The method of claim 5, wherein the obtaining the transmit power of the target synchronization signal block comprises:

9. The method of claim 8 wherein the power configuration information further includes the number of synchronization signal blocks in each power group if the number of synchronization signal blocks in each power group is not the same.

10. The method of claim 5, wherein the obtaining the transmit power of the target synchronization signal block comprises:

11. The method of claim 5, wherein the obtaining the transmit power of the target synchronization signal block comprises:

and determining the transmitting power configuration information corresponding to the power group as the transmitting power of the target synchronous signal block.

12. The method of claim 5, wherein said determining said transmit power based on a reference transmit power and a power float parameter comprises:

13. The method of claim 5, wherein said determining said transmit power based on a reference transmit power and a power float parameter comprises:

14. The method of claim 5, wherein said determining said transmit power based on a reference transmit power and a power float parameter comprises:

15. The method of claim 5, wherein said determining said transmit power based on a reference transmit power and a power float parameter comprises:

16. The method of claim 5, wherein said determining said transmit power based on a reference transmit power and a power float parameter comprises:

17. The method as claimed in any one of claims 1 to 4, wherein said calculating the transmission power of the random access preamble sequence according to the power configuration information and the path loss of the target synchronization signal block comprises:

18. The method as recited in claim 17, further comprising:

19. The method of claim 18, wherein the obtaining the power control parameters carried in the power configuration information comprises:

20. A transmission apparatus for a random access preamble sequence, comprising:

the first processing unit is used for determining a target synchronous signal block according to the reference signal received power and acquiring configuration information carried in the target synchronous signal block, wherein the configuration information comprises power configuration information;

a transmitting unit, configured to transmit the random access preamble sequence on the random access channel according to the transmission power;

the second processing unit is specifically configured to, when determining the transmission power of the random access preamble sequence according to the configuration information and the reference signal reception power:

21. The transmitting apparatus of claim 20, wherein the first processing unit is configured, when determining a target synchronization signal block based on the reference signal received power, to:

22. The transmitting apparatus of claim 20, wherein the first processing unit is configured, when determining a target synchronization signal block based on the reference signal received power, to:

23. The transmitting apparatus of claim 22, wherein the first processing unit, when selecting a target synchronization signal block according to the path loss, is specifically configured to:

24. The transmitting device according to any of claims 20 to 23, wherein the second processing unit, when determining the transmit power according to the power configuration information, is specifically any of the following:

acquiring the transmitting power of the target synchronous signal block;

25. The transmitting device of claim 24, wherein the second processing unit, when acquiring the transmit power of the target synchronization signal block, is specifically configured to:

26. The transmitting device of claim 24, wherein the second processing unit, when acquiring the transmit power of the target synchronization signal block, is specifically configured to:

27. The transmitting device of claim 24, wherein the second processing unit, when acquiring the transmit power of the target synchronization signal block, is specifically configured to:

28. The transmission apparatus of claim 27 wherein the power configuration information further includes the number of synchronization signal blocks in each power group if the number of synchronization signal blocks in each power group is not the same.

29. The transmitting device of claim 24, wherein the second processing unit, when acquiring the transmit power of the target synchronization signal block, is specifically configured to:

30. The transmitting device of claim 24, wherein the second processing unit, when acquiring the transmit power of the target synchronization signal block, is specifically configured to:

31. The transmitting device of claim 24, wherein the second processing unit is configured, when determining the transmit power based on a reference transmit power and a power float parameter, to:

32. The transmitting device of claim 24, wherein the second processing unit is configured, when determining the transmit power based on a reference transmit power and a power float parameter, to:

33. The transmitting device of claim 24, wherein the second processing unit is configured, when determining the transmit power based on a reference transmit power and a power float parameter, to:

34. The transmitting device of claim 24, wherein the second processing unit is configured, when determining the transmit power based on a reference transmit power and a power float parameter, to:

35. The transmitting device of claim 24, wherein the second processing unit is configured, when determining the transmit power based on a reference transmit power and a power float parameter, to:

36. The transmitting device according to any one of claims 20 to 23, wherein the second processing unit is configured to, when calculating the transmission power of the random access preamble sequence according to the power configuration information and the path loss of the target synchronization signal block:

37. The transmitting device of claim 36, wherein the second processing unit is further configured to:

38. The transmitting device of claim 37, wherein the second processing unit is configured to, when acquiring the power control parameter carried in the power configuration information:

39. An electronic device comprising a processor and a memory:

the memory is configured to store a computer program which, when executed by the processor, causes the processor to perform the method of any of claims 1-19.

40. A computer readable storage medium for storing a computer program which, when run on a computer, causes the computer to perform the method of any of the preceding claims 1-19.