CN113950067A

CN113950067A - Method, terminal and network side equipment for receiving message

Info

Publication number: CN113950067A
Application number: CN202010679531.3A
Authority: CN
Inventors: 张敏; 江世宇; 严凡
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2022-01-18

Abstract

The invention discloses a method for receiving a message, a terminal and network side equipment, which can enable the terminal to successfully decode a PDCCH only by one-time Cyclic Redundancy Check (CRC), and effectively overcome the defect of time consumption of PDCCH detection. The method comprises the following steps: after receiving and decoding PBCH information sent by network side equipment, a terminal determines a Physical Downlink Control Channel (PDCCH) candidate set corresponding to the residual minimum system message SIB1 and a Control Channel Element (CCE) aggregation level corresponding to SIB1 according to the PBCH information; the terminal carries out Cyclic Redundancy Check (CRC) on the CCE in the PDCCH candidate set based on the CCE aggregation level to obtain the scheduling information of the PDCCH; and decoding the PDSCH information of the physical downlink shared channel according to the scheduling information of the PDCCH, and acquiring the SIB1 carried in the PDSCH information.

Description

Method, terminal and network side equipment for receiving message

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a method, a terminal, and a network device for receiving a message.

Background

The 5G New air interface (NR) technology can use a larger bandwidth to achieve a more comprehensive network coverage, and according to the TS38.104 specification release V15.0.0 in 12 months in 2017, the frequency ranges of 5G NR are respectively defined as different frequency ranges: FR1 and FR 2. The frequency range FR1 is a frequency band below 6GHz (i.e., 5G Sub-6GHz), also referred to as a low frequency band, and specifically corresponds to a frequency range of 450MHz to 6000MHz, the frequency range FR2 is a 5G millimeter wave frequency band (i.e., a frequency band above 6GHz), and specifically corresponds to a frequency range of 24250MHz to 52600MHz, also referred to as a high frequency band.

The 5G NR technology can use larger bandwidth to realize more comprehensive network coverage, wherein a high-frequency band above 6GHz mainly faces indoor and outdoor local hot spot areas to provide extremely high data transmission rate for users and meet the requirement of extremely high traffic density of a network, and a low-frequency band below 6GHz is used as the most basic coverage mode of mobile communication, so that the experience rate above 100Mbps can be obtained anytime and anywhere on the premise of ensuring the mobility and service continuity of the users.

In the actual cell search process, the terminal needs to acquire the Remaining Minimum System Information (RMSI), also called System Information Block Type 1(SIB1, System Information Block Type1), of the cell, so that the terminal can know how the cell is configured, so that the terminal can access the cell and correctly work in the cell. The SIB1 message primarily contains the availability and scheduling information of other SIB messages, such as the period of the SIB message, SI-window size, etc., and indicates whether other SIB messages are broadcast periodically or sent on demand, and possibly SI request information.

In practical application, the implementation manner of receiving the remaining minimum system message of the cell in the low frequency band is as follows: after a terminal decodes a Physical Broadcast Channel (PBCH) to obtain time-frequency resources of a Control resource set of the RMSI, it needs to attempt to decode the PDCCH on each possible Physical Downlink Control Channel candidate set (PDCCH candidate) by using a System Information radio network temporary identifier RNTI (System Information RNTI, SI-RNTI), a Downlink Control Information format1_0(Downlink Control Information format1_0, DCI format1_0) and all possible Control Channel Element (CCE) aggregation levels in a corresponding common search space, so as to know whether the RMSI message exists.

Therefore, the current technology for receiving the system message of the cell under the low frequency band can cause the time consumption of the system message PDCCH detection to a certain extent, and the power consumption of the terminal and the cell search time are increased.

Disclosure of Invention

The invention provides a method for receiving a message, a terminal and network side equipment, which can enable the terminal to successfully decode a PDCCH only by one-time Cyclic Redundancy Check (CRC), and effectively overcome the defect of time consumption of PDCCH detection.

In a first aspect, a method for receiving a message provided in an embodiment of the present invention is applied to a 5G new air interface NR communication system, and the method includes:

after receiving and decoding PBCH information sent by network side equipment, a terminal determines a Physical Downlink Control Channel (PDCCH) candidate set corresponding to the residual minimum system message SIB1 and a Control Channel Element (CCE) aggregation level corresponding to SIB1 according to the PBCH information;

the terminal carries out Cyclic Redundancy Check (CRC) on the CCE in the PDCCH candidate set based on the CCE aggregation level to obtain the scheduling information of the PDCCH;

and decoding the PDSCH information of the physical downlink shared channel according to the scheduling information of the PDCCH, and acquiring the SIB1 carried in the PDSCH information.

The method provided by the embodiment of the invention can shorten the PDCCH detection time of the terminal, quickly acquire the residual minimum system message, improve the receiving quality of the residual minimum system message and reduce the power consumption of the terminal equipment.

As an optional implementation manner, determining, according to the PBCH information, a PDCCH candidate set corresponding to SIB1 and a CCE aggregation level corresponding to SIB1 includes:

determining an index value of a PDCCH corresponding to the SIB1 according to the PBCH information;

and determining a PDCCH candidate set corresponding to the SIB1 and a CCE aggregation level corresponding to the SIB1 according to the index value of the PDCCH.

and determining a PDCCH candidate set corresponding to SIB1 and a CCE aggregation level corresponding to SIB1 according to bit values generated by a set field in the PBCH information.

As an optional implementation manner, the setting field includes a field in the master information block MIB and a field in the PBCH payload.

In a second aspect, a method for receiving a message provided in the embodiment of the present invention is applied to a 5G new air interface NR communication system, and the method includes:

the network side equipment sets a Physical Downlink Control Channel (PDCCH) candidate set corresponding to the residual minimum system message SIB1 and a Control Channel Element (CCE) aggregation level corresponding to SIB1 in Physical Broadcast Channel (PBCH) information;

and sending the PBCH information to a terminal so that the terminal determines the PDCCH candidate set corresponding to the residual minimum system message SIB1 and the CCE aggregation level corresponding to SIB1 according to the PBCH information.

The method provided by the embodiment of the invention reasonably utilizes RRC resources by using the idle bit in the PBCH information, and effectively improves the cell search performance.

As an optional implementation manner, the setting, by the network side device, the PDCCH candidate set corresponding to the remaining minimum system message SIB1 and the control channel element CCE aggregation level corresponding to SIB1 in the physical broadcast channel PBCH information includes:

the network side equipment sets the index value of the PDCCH in PBCH information, and determines the PDCCH candidate set corresponding to SIB1 and the CCE aggregation level corresponding to SIB1 according to the index value of the PDCCH.

the network side equipment sets the PDCCH candidate set corresponding to SIB1 and the CCE aggregation level corresponding to SIB1 in a setting field of PBCH information, and determines the PDCCH candidate set corresponding to SIB1 and the CCE aggregation level corresponding to SIB1 according to bit values generated by the setting field.

In a third aspect, an embodiment of the present invention further provides a terminal for receiving a message, which is applied to a 5G NR communication system, where the terminal includes a processor and a memory, the memory is used to store a program executable by the processor, and the processor is used to read the program in the memory and execute the following steps:

after receiving and decoding PBCH information sent by network side equipment, determining a Physical Downlink Control Channel (PDCCH) candidate set corresponding to a residual minimum system message SIB1 and a Control Channel Element (CCE) aggregation level corresponding to SIB1 according to the PBCH information;

performing Cyclic Redundancy Check (CRC) on CCE in the PDCCH candidate set based on the CCE aggregation level to obtain scheduling information of the PDCCH;

As an alternative embodiment, the processor is configured to perform:

In a fourth aspect, an embodiment of the present invention further provides a network-side device for receiving a message, which is applied to a 5G NR communication system, where the network-side device includes a processor and a memory, the memory is used to store a program executable by the processor, and the processor is used to read the program in the memory and execute the following steps:

setting a Physical Downlink Control Channel (PDCCH) candidate set corresponding to the residual minimum system message SIB1 and a Control Channel Element (CCE) aggregation level corresponding to SIB1 in Physical Broadcast Channel (PBCH) information;

As an alternative embodiment, the processor is configured to perform:

setting the index value of the PDCCH in PBCH information, and determining a PDCCH candidate set corresponding to SIB1 and a CCE aggregation level corresponding to SIB1 according to the index value of the PDCCH.

As an alternative embodiment, the processor is configured to perform:

setting the PDCCH candidate set corresponding to SIB1 and the CCE aggregation level corresponding to SIB1 in a setting field of PBCH information, and determining the PDCCH candidate set corresponding to SIB1 and the CCE aggregation level corresponding to SIB1 according to bit values generated by the setting field.

In a fifth aspect, an embodiment of the present invention further provides a first apparatus for receiving a message, where the first apparatus is applied to a 5G new air interface NR communication system, and the apparatus includes: confirm module, check module, demodulation module, wherein:

the determining module is configured to, after the terminal receives and decodes physical broadcast channel PBCH information sent by the network side device, determine, according to the PBCH information, a physical downlink control channel PDCCH candidate set corresponding to the remaining minimum system message SIB1 and a control channel element CCE aggregation level corresponding to SIB 1;

the checking module is used for the terminal to perform Cyclic Redundancy Check (CRC) on the CCE in the PDCCH candidate set based on the CCE aggregation level to obtain the scheduling information of the PDCCH;

the demodulation module is configured to decode PDSCH information of a physical downlink shared channel according to the scheduling information of the PDCCH, and acquire SIB1 carried in the PDSCH information.

In a sixth aspect, an embodiment of the present invention further provides a second apparatus for receiving a message, where the second apparatus is applied to a 5G new air interface NR communication system, and the apparatus includes: set up module, sending module, wherein:

the setting module is configured to set, by a network side device, a physical downlink control channel PDCCH candidate set corresponding to the remaining minimum system message SIB1 and a control channel element CCE aggregation level corresponding to SIB1 in physical broadcast channel PBCH information;

the sending module is configured to send the PBCH information to the terminal, so that the terminal determines, according to the PBCH information, a PDCCH candidate set corresponding to the remaining minimum system message SIB1 and a CCE aggregation level corresponding to SIB 1.

Embodiments of the present invention also provide a computer storage medium, on which a computer program is stored, where the computer program is used to implement the steps of the method according to the first aspect or the second aspect when the computer program is executed by a processor.

These and other aspects of the present application will be more readily apparent from the following description of the embodiments.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1A is a schematic diagram of a system for receiving information according to an embodiment of the present invention;

fig. 1B is a schematic diagram of a system for receiving information according to an embodiment of the present invention;

fig. 2A is a schematic diagram of PBCH information sent by a network side device to a terminal according to an embodiment of the present invention;

fig. 2B is a schematic diagram of PBCH information sent by a network side device to a terminal according to an embodiment of the present invention;

fig. 3 is a flowchart of receiving a remaining minimum system message according to an embodiment of the present invention;

fig. 4 is a specific flowchart of a system for receiving a message according to an embodiment of the present invention;

fig. 5 is a flowchart of a method for receiving a message according to an embodiment of the present invention;

fig. 6 is a flowchart of another method for receiving a message according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a terminal for receiving a message according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a network side device for receiving a message according to an embodiment of the present invention;

fig. 9 is a schematic diagram of a first apparatus for receiving a message according to an embodiment of the present invention;

fig. 10 is a schematic diagram of a second apparatus for receiving a message according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The method for receiving the message provided by the embodiment of the invention can be applied to a terminal and can also be applied to network side equipment.

It should be noted that the terminal is a device with a wireless communication function, and can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), etc.; but also UEs in various forms, Mobile Stations (MSs), the terminal equipment (terminal device).

The network side device may be a gbb, a macro base station, a micro base station, a CU (Central Unit), a DU (Distributed Unit), or the like in 5G.

The term "and/or" in the embodiments of the present invention describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The application scenario described in the embodiment of the present invention is for more clearly illustrating the technical solution of the embodiment of the present invention, and does not form a limitation on the technical solution provided in the embodiment of the present invention, and it can be known by a person skilled in the art that with the occurrence of a new application scenario, the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems.

First, a brief description is given of an application scenario of the embodiment of the present invention.

The 5G NR technology can use larger bandwidth to realize more comprehensive network coverage, wherein a high-frequency band above 6GHz mainly faces indoor and outdoor local hot spot areas to provide extremely high data transmission rate for users and meet the requirement of extremely high traffic density of a network, and a low-frequency band below 6GHz is used as the most basic coverage mode of mobile communication, so that the experience rate above 100Mbps can be obtained anytime and anywhere on the premise of ensuring the mobility and service continuity of the users. The high-frequency and low-frequency combined networking mode can meet the user experience and equipment connection in diversified scenes, and simultaneously provides favorable conditions for the rapid development of low-frequency service. During the cell search, the terminal needs to acquire the remaining minimum system message RMSI of the cell, that is, SIB1, so that the terminal can acquire the configuration information of the cell in order to access the cell and operate correctly in the cell. The current master information block SIB includes SIB 1-SIB 9, wherein SIB1 mainly contains the availability and scheduling information of other SIBs 2-SIB 9, such as the period of SIB 2-SIB 9, the system information window SI-window size, etc., and indicates whether SIB 2-SIB 9 are periodically broadcast or transmitted on demand, and possibly SI request information.

In practical application, the system message reception of the cell in the low frequency band is implemented as follows:

step 1, after a terminal demodulates a Physical Broadcast Channel (PBCH), obtaining time-frequency domain information of a Synchronization Signal Block (SSB), and simultaneously obtaining Common Resource Blocks (CRB) grid offset and SIB1 configuration information;

step 2, according to the CRB grid offset and the SIB1 configuration information, the terminal determines the total number of CCEs (Control Channel elements) corresponding to SIB1 and the PDCCH monitoring occasion (monitoring interference) of SIB 1;

wherein, the total CCE number corresponding to the SIB1 is a total CCE number that can be occupied by a PDCCH (Physical Downlink Control Channel) in a subframe in a Control Resource Set (CORESET 0) corresponding to a Common Search Space (CSS) in which the SIB1 is located;

step 3, the terminal uses SI-RNTI (System Information Radio Network temporal Identity), DCI format1_0(Downlink Control Information format1_0) and CCEs in each possible PDCCH candidate set in a public search space where each possible CCE Aggregation Level (AL) and SIB1 are located to perform CRC check one by one, namely, all possible aggregation levels and PDCCH candidate sets are tried to decode PDCCH once;

specifically, the CCE aggregation level and the corresponding maximum PDCCH candidate set number in the SIB1 common search space may refer to a 3GPP physical layer control process protocol, and the specific content is shown in table 1, where the terminal may need to perform blind detection on PDCCH candidate sets in the common search space respectively according to AL being 4, 8, and 16, and the maximum blind detection time may reach 7 times.

CCE aggregation levels	Number of PDCCH candidates
		4	4
8	2
		16	1

And 4, after the PDCCH is decoded successfully, the terminal decodes the PDSCH according to the scheduling information carried by the PDCCH corresponding to the SIB1 to obtain SIB1 information, thereby completing the cell search process.

In summary, in the prior art, the terminal needs to attempt decoding according to each possible PDCCH candidate in the common search space where the aggregation levels AL 4, 8, and 16 and the SIB1 are located, and the maximum decoding time can reach 7 times, so as to determine the scheduling information carried by the PDCCH to be received, which wastes the decoding time of the SIB1, and increases the power consumption of the terminal device and the cell search time.

In order to solve the above-mentioned drawbacks, embodiments of the present invention provide a method for receiving a message, so that after a terminal decodes PBCH information, a PDCCH candidate set in a common search space where SIB1 is located and a CCE aggregation level in the PDCCH candidate set can be specified, and therefore, a time for the terminal to decode a PDCCH can be effectively shortened, thereby quickly obtaining a remaining minimum system message.

Embodiment 1 and the method for receiving a message provided in this embodiment are applied to a 5G new air interface NR communication system, where the system includes a terminal and a network side device, and the following describes implementation steps of the system:

as shown in fig. 1A and 1B, the system includes a terminal 100 and a network side device 101, wherein:

the terminal 100 is configured to receive and decode physical broadcast channel PBCH information sent by a network side device, and determine a physical downlink control channel PDCCH candidate set corresponding to the remaining minimum system message SIB1 and a control channel element CCE aggregation level corresponding to SIB1 according to the PBCH information; the terminal carries out Cyclic Redundancy Check (CRC) on the CCE in the PDCCH candidate set based on the CCE aggregation level to obtain the scheduling information of the PDCCH; and decoding the PDSCH information of the physical downlink shared channel according to the scheduling information of the PDCCH, and acquiring the SIB1 carried in the PDSCH information.

The network side device 101 is configured to set a physical downlink control channel PDCCH candidate set corresponding to the remaining minimum system message SIB1 and a control channel element CCE aggregation level corresponding to SIB1 in physical broadcast channel PBCH information; and sending the PBCH information to a terminal so that the terminal determines the PDCCH candidate set corresponding to the residual minimum system message SIB1 and the CCE aggregation level corresponding to SIB1 according to the PBCH information.

First, PBCH information transmitted by a network side device is explained:

as shown in fig. 2A, the PBCH information sent by the network side device to the terminal in the embodiment of the present invention includes PBCH transport block bit sequence from a higher layer

And PBCH payload

Wherein the content of the first and second substances,

indicating the sequence length, the PBCH transport block bit sequence

Also called Master Information Block (MIB).

Wherein, the physical layer of the network side equipment receives the PBCH transport block bit sequence from the higher layer

Thereafter, additional time-dependent PBCH payload may be generated

It is easy to understand that, after receiving the PBCH transport block, the physical layer of the network side device considers that the information carried by the PBCH transport block is not enough for the terminal to obtain the complete information of the time domain, so a group of 8 bits related to the time is additionally generated to carry the time information, and the 8 bits include the system frame number, the half frame indication identifier, the SSB subcarrier offset, and the like, so that after the terminal demodulates the PBCH information successfully, the complete information of the time domain, such as the frame number, the subframe number, the slot number, and the like, can be obtained.

Since PBCH information includes an idle bit, the PDCCH candidate set corresponding to SIB1 and the CCE aggregation level corresponding to SIB1 may be set in the physical broadcast channel PBCH information using the idle bit.

As an optional implementation manner, the network side device sets an index value of a PDCCH in PBCH information, and determines a PDCCH candidate set corresponding to SIB1 and a CCE aggregation level corresponding to SIB1 according to the index value of the PDCCH. Optionally, a mapping relationship between the index value of the PDCCH and the PDCCH candidate set corresponding to SIB1 and the CCE aggregation level corresponding to SIB1 is shown in table 2.

PDCCH index value	CCE aggregation levels	Location candidate set
			0	4	1
1	4	2
			2	4	3
3	4	4
			4	8	1
5	8	2
			6	16	1

Specifically, the value range of the PDCCH index value PDCCH _ index is 0 to 6, so that the PBCH load can be adjusted to

The field is set to the lower two bits of the PDCCH index value, and meanwhile, the idle field of the MIB in the PBCH information is set to the upper two bits of the PDCCH index value.

As an optional implementation manner, the network side device sets the PDCCH candidate set corresponding to SIB1 and the CCE aggregation level corresponding to SIB1 in a setting field of PBCH information, and determines the PDCCH candidate set corresponding to SIB1 and the CCE aggregation level corresponding to SIB1 according to bit values generated by the setting field.

Specifically, in the embodiment of the present invention, the setting field includes a plurality of fields, a bit value of each field is at least 1bit, and bits corresponding to the plurality of fields may be combined to generate a multi-bit binary bit value, where the embodiment of the present invention does not limit the level of a bit in which each field in the setting field is located. For example, if the setting fields are the a field, the B field, the C field, and the D field, and the bit on each field is 1bit, the SSB index information may be represented by a four-bit value according to the bit order of ABCD, or may be represented by the SSB index information according to the order of CADB, which is not limited in the embodiments of the present invention.

Optionally, the setting field includes a field in a master information block MIB and a field in a PBCH payload.

As an optional implementation manner, in the embodiment of the present invention, a network side device sets an index value of a PDCCH in a setting field of PBCH information, and determines the index value of the PDCCH according to a bit value generated by the setting field; and determining a PDCCH candidate set corresponding to the SIB1 and a CCE aggregation level corresponding to the SIB1 according to the index value of the PDCCH.

As shown in FIG. 2B, if the embodiment of the present invention

The PBCH information contains 4 reserved bits (i.e., free bits) with a value of 24, wherein the MIB comprises

PBCH payload includes

The network side device may set a two-bit idle field in the MIB

And a two-bit idle field in PBCH payload

And determining a PDCCH candidate set corresponding to SIB1 and a CCE aggregation level corresponding to SIB1 by using bit values generated by the combination of the 4-bit fields. For example, if the PDCCH candidate set corresponding to SIB1 is the 3 rd candidate set, and the CCE aggregation level AL corresponding to SIB1 is 4, that is, SIB1 is transmitted on the 3 rd PDCCH candidate set using the CCE aggregation level AL of 4, the corresponding PDCCH index value PDCCH _ index is 2, and 2 is converted into binary value 0010, so the network side device sets a two-bit idle field in the MIB

00, two-bit idle field in PBCH payload

Is 10, composed of

And

the bit value generated by combining is 0010, and then 0010 can be used to indicate the PDCCH candidate set corresponding to SIB1 and the CCE aggregation level corresponding to SIB 1.

In summary, since the PBCH information sent by the network side device to the terminal carries the PDCCH candidate set corresponding to SIB1 and the CCE aggregation level corresponding to SIB1, after the terminal successfully demodulates PBCH, the PDCCH candidate set corresponding to SIB1 and the CCE aggregation level corresponding to SIB1 can be determined.

Optionally, the total length of the PBCH information is 32 bits, where the transport block TB is 24 bits, and the time-dependent payload is 8 bits, and in a low-frequency scene, the information and length contained in the low-frequency scene are as follows:

SSB index information: 0 bit;

cell lockout identification: 2 bit;

first PDSCH DM-RS location: 1 bit;

SIB1 parameter set: 1 bit;

SIB1 configuration: 8 bit;

common resource block grid offset: 5 bit;

half frame bit: 1 bit;

system frame number: 10 bit;

the above is a total of 28 bits, so there are 4 spare bits unused.

Therefore, in the embodiment of the present invention, the index value of the PDCCH may be represented by a bit value obtained by combining the 2-bit idle field of the MIB in the PBCH information and the 2-bit idle field in the PBCH payload, so as to set the index value of the PDCCH in the PBCH information.

Specifically, since the value range of the PDCCH index value is 0 to 6, an optional implementation is to add PBCH in the load

Setting a field as a low two-bit of a PDCCH index value, wherein the value range is 0-3, and meanwhile, setting a space field of MIB information in a PBCH transmission block as a high two-bit of the PDCCH index value, wherein the value range is 4-7;

in another alternative embodiment, PBCH is loaded

The field is set as the high two bits of the PDCCH index value, the value range is 4-7, and meanwhile, the space field of the MIB information in the PBCH transmission block is set as the low two bits of the PDCCH index value, and the value range is 0-3.

As shown in fig. 3, the terminal according to the embodiment of the present invention receives the remaining minimum system message in the following manner:

step 300, the terminal receives and decodes the physical broadcast channel PBCH information sent by the network side equipment;

step 301, the terminal determines the total number of CCEs occupied by the PDCCH corresponding to SIB1 in a subframe and the monitoring opportunity of the PDCCH according to the CRB grid offset and SIB1 configuration information in PBCH information;

step 302, the terminal determines the index value of the PDCCH corresponding to SIB1 according to the bit value generated by the setting field in the PBCH information, and determines the PDCCH candidate set corresponding to SIB1 and the CCE aggregation level corresponding to SIB1 according to the index value of the PDCCH;

Step 303, the terminal performs Cyclic Redundancy Check (CRC) on CCE in the PDCCH candidate set based on the CCE total number and the CCE aggregation level in the monitoring time of the PDCCH to obtain scheduling information of the PDCCH;

specifically, the terminal uses SI-RNTI, DCI format1_0 and aggregation level to perform CRC on CCEs in the PDCCH candidate set based on the CCE total number and the CCE aggregation level, and decodes the PDCCH to obtain DCI format1_0 information;

all the RNTI types are specified by the 5G NR standard protocol, and the RNTI types can be acquired by the terminal and the network side equipment. The terminal has different expected information at different stages, for example, when the terminal expects to receive the system message, the terminal uses the SI-RNTI to decode the PDCCH information; the DCCH information can be decoded by using the SI-RNTI to obtain DCI format1_0 information carried in the PDCCH information, and in addition, the DCI format is defined to be DCI format1_0 by the 5G standard protocol.

And step 304, the terminal decodes the PDSCH information according to the scheduling information of the PDCCH to acquire the SIB1 carried in the PDSCH information.

Specifically, the SIB1 is sent through downlink PDSCH information, and the PDSCH information needs scheduling information of a PDCCH for scheduling, where DCI format1_0 carried in the PDCCH information is mainly used to send downlink scheduling allocation information, including frequency domain resources, time domain resources, resource block mapping, modulation and coding scheme, redundancy version, system information indication, and the like, so that the terminal can decode the PDSCH information according to the DCI format1_0 in the PDCCH, thereby obtaining SIB1 to complete cell search.

Embodiment 2 and the embodiments of the present invention further provide a system for receiving a message, where the system includes a terminal and a network device, and as shown in fig. 4, a specific flow of the system for receiving a message is as follows:

step 400, the network side device sets the index value of the PDCCH in PBCH information;

step 401, the network side device sends the SSBs in a beam scanning manner, where each SSB carries PBCH information;

step 402, the terminal receives PBCH information and decodes the PBCH information;

step 403, the terminal determines the total number of CCEs occupied by the PDCCH corresponding to SIB1 in a subframe and the monitoring opportunity of the PDCCH according to the CRB grid offset and SIB1 configuration information in the decoded PBCH information;

step 404, the terminal determines the index value of the PDCCH corresponding to the SIB1 according to the bit value generated by the set field in the PBCH information;

step 405, the terminal determines a PDCCH candidate set corresponding to SIB1 and a CCE aggregation level corresponding to SIB1 according to the index value of the PDCCH;

step 406, the terminal performs Cyclic Redundancy Check (CRC) on CCEs in the PDCCH candidate set based on the CCE total number and the CCE aggregation level in the monitoring time of the PDCCH to obtain DCI format1_0 information carried in the PDCCH;

step 407, the terminal decodes the PDSCH information according to the DCI format1_0 information, and acquires SIB1 carried in the PDSCH information.

Embodiment 3, based on the same inventive concept, an embodiment of the present invention provides a method for receiving a message, which is applied to a 5G new air interface NR communication system and may be applied to a terminal side, as shown in fig. 5, where the method includes:

step 500, after receiving and decoding the PBCH information of the physical broadcast channel sent by the network side device, the terminal determines a physical downlink control channel PDCCH candidate set corresponding to the remaining minimum system message SIB1 and a control channel element CCE aggregation level corresponding to SIB1 according to the PBCH information;

step 501, the terminal performs Cyclic Redundancy Check (CRC) on CCE in the PDCCH candidate set based on the CCE aggregation level to obtain scheduling information of the PDCCH;

step 502, decoding the PDSCH information of the physical downlink shared channel according to the scheduling information of the PDCCH, and acquiring SIB1 carried in the PDSCH information.

Embodiment 4, based on the same inventive concept, an embodiment of the present invention further provides another method for receiving a message, which is applied to a 5G new air interface NR communication system and may be applied to a network side device, and as shown in fig. 6, the method includes:

step 600, the network side device sets a Physical Downlink Control Channel (PDCCH) candidate set corresponding to the remaining minimum system message SIB1 and a Control Channel Element (CCE) aggregation level corresponding to SIB1 in PBCH information;

step 601, sending the PBCH information to the terminal, so that the terminal determines the PDCCH candidate set corresponding to the remaining minimum system message SIB1 and the CCE aggregation level corresponding to SIB1 according to the PBCH information.

Embodiment 5, based on the same inventive concept, an embodiment of the present invention further provides a terminal for receiving a message, which is applied to a 5G NR communication system, and since the terminal is a terminal corresponding to the embodiment of the present invention, and a principle of the terminal for solving a problem is similar to that of the method, the implementation of the terminal may refer to the implementation of the method, and repeated details are omitted.

As shown in fig. 7, the terminal includes: a processor 700 and a memory 701, the memory 701 is used for storing programs executable by the processor 700, the processor 700 is used for reading the programs in the memory 701 and executing the following steps:

As an alternative embodiment, the processor 700 is specifically configured to perform:

Embodiment 6 is based on the same inventive concept, and the embodiment of the present invention further provides a network side device for receiving a message, which is applied to a 5G NR communication system, because the device is a receiving device corresponding to the embodiment of the present invention, and the principle of the device for solving the problem is similar to that of the method, the implementation of the device may refer to the implementation of the method, and repeated details are omitted.

As shown in fig. 8, the network-side device includes: a processor 800 and a memory 801, the memory 801 is used for storing programs executable by the processor 800, the processor 800 is used for reading the programs in the memory 801 and executing the following steps:

As an alternative implementation, the processor 800 is specifically configured to perform:

Embodiment 7 is based on the same inventive concept, and a first apparatus for receiving a message is further provided in this embodiment, and is applied to a 5G new air interface NR communication system.

As shown in fig. 9, the apparatus includes: a determining module 900, a checking module 901 and a demodulating module 902, wherein:

the determining module 900 is configured to, after the terminal receives and decodes the PBCH information of the physical broadcast channel sent by the network side device, determine, according to the PBCH information, a PDCCH candidate set corresponding to the remaining minimum system message SIB1 and a CCE aggregation level corresponding to the SIB 1;

the checking module 901 is configured to perform Cyclic Redundancy Check (CRC) on the CCE in the PDCCH candidate set by the terminal based on the CCE aggregation level to obtain scheduling information of the PDCCH;

the demodulation module 902 is configured to decode PDSCH information of a physical downlink shared channel according to the scheduling information of the PDCCH, and acquire SIB1 carried in the PDSCH information.

As an optional implementation manner, the determining module 900 is specifically configured to:

Embodiment 8 is based on the same inventive concept, and a second apparatus for receiving a message is further provided in this embodiment, and is applied to a 5G new air interface NR communication system.

As shown in fig. 10, the apparatus includes: a setting module 1000 and a sending module 1001, wherein:

the setting module 1000 is configured to set, by a network side device, a physical downlink control channel PDCCH candidate set corresponding to the remaining minimum system message SIB1 and a control channel element CCE aggregation level corresponding to SIB1 in physical broadcast channel PBCH information;

the sending module 1001 is configured to send the PBCH information to a terminal, so that the terminal determines, according to the PBCH information, a PDCCH candidate set corresponding to the remaining minimum system message SIB1 and a CCE aggregation level corresponding to SIB 1.

As an optional implementation manner, the setting module 1000 is specifically configured to:

The present embodiments also provide a computer storage medium, which when executed by a processor, performs the steps of the method:

The present application is described above with reference to block diagrams and/or flowchart illustrations of methods, apparatus (systems) and/or computer program products according to embodiments of the application. It will be understood that one 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. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.

Accordingly, the subject application may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for receiving messages is applied to a 5G new air interface NR communication system, and comprises the following steps:

2. The method of claim 1, wherein determining the PDCCH candidate set corresponding to SIB1 and the CCE aggregation level corresponding to SIB1 based on the PBCH information comprises:

3. The method of claim 1, wherein determining the PDCCH candidate set corresponding to SIB1 and the CCE aggregation level corresponding to SIB1 based on the PBCH information comprises:

4. The method of claim 3, wherein the setting fields comprise a field in a Master Information Block (MIB) and a field in a PBCH payload.

5. A method for receiving messages is applied to a 5G new air interface NR communication system, and comprises the following steps:

6. The method of claim 5, wherein the network side device sets the PDCCH candidate set corresponding to the remaining minimum system message SIB1 and the Control Channel Element (CCE) aggregation level corresponding to SIB1 in the physical broadcast channel PBCH information, comprising:

7. The method of claim 5, wherein the network side device sets the PDCCH candidate set corresponding to the remaining minimum system message SIB1 and the Control Channel Element (CCE) aggregation level corresponding to SIB1 in the physical broadcast channel PBCH information, comprising:

8. The method of claim 7, wherein the setting fields comprise a field in a Master Information Block (MIB) and a field in a PBCH payload.

9. A terminal for receiving messages, characterized in that it comprises a processor and a memory for storing a program executable by said processor, said processor being adapted to read the program in said memory and to carry out the steps of the method of:

10. A network-side device for receiving a message, the network-side device comprising a processor and a memory, the memory storing a program executable by the processor, the processor being configured to read the program in the memory and perform the steps of the method:

11. A computer storage medium having a computer program stored thereon, the program, when executed by a processor, implementing the steps of a method according to any one of claims 1 to 4; or the steps of the process of any one of claims 5 to 8.