CN109392180B

CN109392180B - Random access method, network side equipment and mobile communication terminal

Info

Publication number: CN109392180B
Application number: CN201710684787.1A
Authority: CN
Inventors: 侯雪颖; 黄宇红; 王晓云; 徐晓东; 夏亮; 胡丽洁
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2017-08-11
Filing date: 2017-08-11
Publication date: 2021-06-29
Anticipated expiration: 2037-08-11
Also published as: WO2019029341A1; CN109392180A

Abstract

The invention provides a random access method, network side equipment and a mobile communication terminal, wherein the method corresponding to the network side equipment comprises the following steps: receiving a random access preamble sequence RAP sent by a mobile communication terminal through a physical random access channel PRACH; sending a Physical Downlink Control Channel (PDCCH) scrambled by using a random access radio network temporary identifier (RA-RNTI); the value of the RA-RNTI is at least related to a target carrier used by the PRACH and selected from a plurality of carriers and time domain and/or frequency domain position information of the PRACH in the target carrier. The invention establishes the relation between RA-RNTI and the target carrier and the time domain and/or frequency domain position information of PRACH in the target carrier, so that the mobile communication terminal can determine the random access preamble of which carrier the random access response is directed.

Description

Random access method, network side equipment and mobile communication terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a random access method, a network side device, and a mobile communication terminal.

Background

As shown in fig. 1, in an existing LTE (Long Term Evolution) Random Access procedure, after a mobile communication terminal sends a Random Access Preamble (RAP) to a network side device, the network side device feeds back a Random Access Response (RAR) to the mobile communication terminal. Before the network side device feeds back the RAR to the mobile communication terminal, it needs to schedule the time-frequency resource for transmitting the RAR through a PDCCH (Physical Downlink Control Channel).

In a future 5G (5th-generation, fifth generation mobile communication technology) NR (New Radio) system, one downlink Carrier may correspond to multiple Uplink carriers, for example, one full Uplink Carrier (SUL Carrier) may be paired with a TDD (Time Division Duplex) Carrier or an FDD (Frequency Division Duplex) Carrier. In this case, how to design a corresponding random access procedure for the uplink dual carrier becomes an urgent problem to be solved.

Disclosure of Invention

The present invention aims to provide a random access method, a network side device and a mobile communication terminal, so as to solve the above problems.

In order to achieve the above object, in a first aspect, the present invention provides a random access method, applied to a network side device, where the random access method includes:

receiving a random access preamble sequence RAP sent by a mobile communication terminal through a physical random access channel PRACH;

sending a Physical Downlink Control Channel (PDCCH) scrambled by using a random access radio network temporary identifier (RA-RNTI);

the value of the RA-RNTI is at least related to a target carrier used by the PRACH and selected from a plurality of carriers and time domain and/or frequency domain position information of the PRACH in the target carrier.

In a second aspect, the present invention further provides another random access method, which is applied to a network device, where the random access method includes:

and the value set of the aggregation level of the PDCCH is related to the transmission information of the PRACH.

In a third aspect, the present invention further provides another random access method applied to a mobile communication terminal, where the random access method includes:

sending a random access preamble sequence RAP through a physical random access channel PRACH;

receiving a Physical Downlink Control Channel (PDCCH) which is transmitted by network side equipment and scrambled by using a random access radio network temporary identifier (RA-RNTI);

In a fourth aspect, the present invention further provides another random access method applied to a mobile communication terminal, where the random access method includes:

In a fifth aspect, the present invention further provides a network-side device, where the network-side device includes a transceiver, and the transceiver is configured to:

In a sixth aspect, the present invention further provides another network-side device, where the network-side device includes a transceiver, and the transceiver is configured to:

In a seventh aspect, the present invention further provides a mobile communication terminal, comprising a transceiver configured to:

receiving a Physical Downlink Control Channel (PDCCH) which is transmitted by a network side and scrambled by using a random access radio network temporary identifier (RA-RNTI);

In an eighth aspect, the present invention provides another mobile communication terminal, including a transceiver for:

In a ninth aspect, the present invention further provides another network-side device, including a memory, a processor, and a computer program stored in the memory and executable on the processor; and when the processor executes the program, the random access method corresponding to the network side equipment provided by the invention is realized.

In a tenth aspect, the present invention also provides another mobile communication terminal, comprising a memory, a processor and a computer program stored on the memory and executable on the processor; the processor implements the random access method corresponding to the mobile communication terminal provided by the invention when executing the program.

In an eleventh aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the random access method corresponding to the network-side device provided in the present invention.

In a twelfth aspect, the present invention also provides another computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the random access method corresponding to the mobile communication terminal provided by the present invention.

The technical scheme of the invention at least has the following beneficial effects:

on one hand, the invention enables the mobile communication terminal to determine the random access preamble of which carrier the random access response is directed to by establishing the relationship between the RA-RNTI and the target carrier and the time domain and/or frequency domain position information of the PRACH in the target carrier. On the other hand, the invention enables the network side equipment to design different aggregation levels aiming at different coverage conditions by establishing the relationship between the aggregation level of the PDCCH and the transmission information of the PRACH. Therefore, the invention can realize the random access of the uplink double carriers.

Drawings

Fig. 1 is a flow chart illustrating a conventional random access method in LTE;

fig. 2 is a flowchart illustrating a random access method according to a first embodiment;

fig. 3 is a flowchart illustrating a random access method according to a second embodiment;

fig. 3-1 shows a DMRS transmission diagram with overhead of 1/2 provided by the second embodiment;

fig. 3-2 shows a DMRS transmission diagram with an overhead of 1/3 provided by the second embodiment;

fig. 4 is a schematic structural diagram of a network-side device according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of another network-side device according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a mobile communication terminal according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of another mobile communication terminal according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of another network-side device according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of another network-side device according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of another mobile communication terminal according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of another mobile communication terminal according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

First embodiment

In the 5G NR system, in order to fully exploit the advantages of TDD and FDD, one SUL carrier may be defined, and one SUL carrier may be bundled or paired with one TDD carrier or FDD carrier for transmission. To meet coverage requirements, the defined SUL carriers may be located at low frequencies; in order to have a richer spectrum resource to provide high data rate transmission, the frequency of the TDD carrier or FDD carrier may be higher. Of course, the arrangement may be made in a reverse manner to that described above. Under the above binding or pairing transmission mode, the network side device may send PRACH resources corresponding to one TDD carrier or FDD carrier and PRACH resources corresponding to an SUL carrier to the mobile communication terminal in the designated type cell, respectively, to assist completion of the subsequent random access procedure.

However, for the case where the SUL carrier is used in pair with the normal carrier, one downlink carrier corresponds to a plurality of uplink carriers. How to make the mobile communication terminal determine which uplink carrier the RAR of the Network side device on the downlink carrier is directed to, or how the Network side device configures the PRACH time-frequency resources of multiple uplink carriers, and how to establish a corresponding relationship between the configured PRACH time-frequency and an RA-RNTI (Random Access Radio Network Temporary Identity, Random Access Radio Network Temporary identifier), is a problem to be solved by the embodiments of the present invention.

Referring to fig. 2, fig. 2 is a flowchart illustrating a random access method according to an embodiment of the present invention. As shown in fig. 2, a random access method includes the following steps:

201. the mobile communication terminal sends a random access preamble sequence RAP through a physical random access channel PRACH.

202. And the network side equipment receives RAP sent by the mobile communication terminal through the PRACH.

203. And the network side equipment sends a Physical Downlink Control Channel (PDCCH) scrambled by using a random access radio network temporary identifier (RA-RNTI), wherein the value of the RA-RNTI is at least related to a target carrier selected from a plurality of carriers and time domain and/or frequency domain position information of the PRACH in the target carrier, which is used by the PRACH.

204. And the mobile communication terminal receives the PDCCH scrambled by the RA-RNTI sent by the network side equipment.

In the embodiment of the invention, in order to enable the mobile communication terminal to distinguish resources of PRACH (physical random access channel) of different carriers, network side equipment can use PDCCH scrambled by RA-RNTI (random access network-radio network temporary identifier), wherein the value of the RA-RNTI is at least related to a target carrier used by the PRACH and time domain and/or frequency domain position information of the PRACH in the target carrier.

Further, the value of the RA-RNTI is related to the carrier identifier.

At least two embodiments will be specifically described below.

In one mode, the relationship between the value of the RA-RNTI and a target carrier selected from a plurality of carriers used by the PRACH is indicated by an implicit mode, the PRACH frequency domain resources of the plurality of carriers are uniformly numbered in the implicit mode, and the RA-RNTI corresponds to the frequency domain resources selected by the mobile communication terminal from the uniformly numbered PRACH frequency domain resources one by one;

in another mode, the relationship between the value of the RA-RNTI and a target carrier selected from multiple carriers used by the PRACH is indicated by an explicit mode, where the explicit mode is to introduce a carrier index parameter into a calculation formula of the RA-RNTI, and values of the carrier index parameters of different carriers are different.

Implicit mode: the frequency domain resources of multiple carriers are uniformly numbered and configured, specifically, assuming that there are Ki available frequency domain resource positions of PRACH on the ith uplink carrier, and i is 1, … N, then there are (K1+ K2+ … K _ N) resources on the PRACH resources on N carriers; for example, one way that can be used is:

RA-RNTI＝1+t_id+M*f_id_NR

wherein, the value of f _ id _ NR has a one-to-one correspondence relationship with (K1+ K2+ … K _ N) PRACH frequency domain resource locations, and t _ id is a time domain location index where the PRACH is located.

The display mode is as follows: the carrier identity is introduced into the calculation formula of RA-RNTI, for example, one way that can be used is:

RA-RNTI＝1+t_id+M*(L_{i_carrier}+f_id_{i_carrier})

the PRACH frequency domain indexes of multiple carriers are considered in the above formula, where i _ carrier is 1,2, and … N are carrier identifiers, and N is a positive integer, which represents the number of uplink carriers; m is a positive integer independent of the carrier index, e.g., M is 10; f _ id _ { i _ carrier } is an identification of the frequency domain location of the PRACH available on the ith _ carrier; t _ id is the time domain position index where the PRACH is located; l _ { i _ carrier } is a positive integer whose value may be related to the carrier index, and L _ { i _ carrier } values for different carriers are different.

Optionally, the value set of the aggregation level of the PDCCH is related to transmission information of the PRACH, and specifically, the value set of the aggregation level of the PDCCH includes K aggregation level values, where K is a positive integer.

For the case that the SUL carriers are paired with the normal carriers for use, one downlink carrier should correspond to a plurality of uplink carriers. For users transmitting PRACH on the SUL carrier, the coverage is usually poor; for users transmitting PRACH on a TDD carrier, the coverage is usually better; the overhead is large if the aggregation levels of the PDCCHs scheduling Msg2(Message 2) are all designed for users with poor coverage.

In view of the above, in the embodiments of the present invention, it is considered that different PDCCH aggregation levels are designed for users with different coverage.

The method for scrambling the PDCCH by the network side device using the RA-RNTI may include various methods, for example, the network side device may scramble cyclic redundancy check, CRC, information of the downlink control information carried by the PDCCH using the RA-RNTI, the network side device may scramble the downlink control information carried by the PDCCH using the RA-RNTI, and the network side device may scramble the CRC information of the downlink control information carried by the PDCCH and the downlink control information carried by the PDCCH using the RA-RNTI.

Optionally, the random access method further includes:

the network side equipment sends a reference signal RS corresponding to the PDCCH;

a mobile communication terminal receives a reference signal RS corresponding to a PDCCH sent by network side equipment;

the number and/or pattern of RSs is related to the set of values of the aggregation level of the PDCCH.

In the embodiment of the present invention, the RS pattern represents the distribution of RSs on time-frequency resources, such as the interval between adjacent RSs.

In the embodiment of the present invention, since the network state can reflect a Reference Signal (RS) corresponding to the PDCCH, the number and/or pattern of the RS may refer to a value set of an aggregation level of the PDCCH. In view of this, the network side device may transmit a reference signal RS corresponding to the PDCCH. Generally speaking, when the network state is poor, the value of the aggregation level of the PDCCH is relatively large, and the number or pattern of the RS is correspondingly increased; when the network state is better, the value of the aggregation level of the PDCCH is correspondingly smaller, and the number or the pattern of the RS is correspondingly reduced.

Optionally, the value set of the aggregation level of the PDCCH is related to transmission information of the PRACH, the transmission information of the PRACH at least includes resource set information where PRACH transmission is located, and the resource set information where PRACH transmission is located may include at least one of information of a carrier carrying the PRACH, location information of the PRACH in a target carrier, or format information of the PRACH.

Optionally, a value set of the aggregation level of the PDCCH corresponds to information of a resource set in which the PRACH transmission is located, specifically, a resource set in which each M types of PRACH transmission is located corresponds to a value set of the aggregation level of a set of PDCCHs, where M is a positive integer.

When the transmission information of the PRACH is information of a carrier carrying the PRACH, the network side device may notify the mobile communication terminal of the information of the carrier carrying the PRACH in a display signaling or implicit binding manner. And from the mobile communication terminal, the information of the carrier bearing the PRACH is obtained by the mobile communication terminal through a display signaling or an implicit binding mode.

It should be noted that, considering that when the frequency point of the carrier carrying the PRACH is higher, the corresponding network coverage is poorer, the value of the aggregation level of the PDCCH may be larger to meet the random access requirement. It can also be understood that the higher the frequency point of the carrier carrying the PRACH is, the larger the value set of the aggregation level of the PDCCH is.

When the transmission information of the PRACH is the location information of the PRACH in the target carrier, the location information of the PRACH in the target carrier may be time domain and/or frequency domain location information, and an implicit or explicit binding relationship exists between the location information and an aggregation level of a PDCCH that schedules the Msg 2.

When the transmission information of the PRACH is format information of the PRACH, the following implementable manners may be included.

One way that can be implemented is: for downlink control format information for scheduling Msg2, different aggregation level sets may be used for the same downlink control format information.

Specifically, if the mobile communication terminal sends PRACH in the time-frequency resource a set, for a downlink control format information, the possible aggregation levels of the PDCCH scrambled by the corresponding RA-RNTI are M1, …, M _ L; if the mobile communication terminal sends the PPRACH in the time frequency resource B set, for the same downlink control format information, the possible aggregation levels of the PDCCH scrambled by the corresponding RA-RNTI are N1, … and N _ L.

Different values of M _ i and different values of N _ i can be partially the same or completely different. For example: consider L ═ 2, i.e., there are 2 types of polymerization grades; the values for M _ i and N _ i are respectively: m1 ═ 4, M2 ═ 8, N1 ═ 8, N2 ═ 16; or M1 ═ 2, M2 ═ 4, N1 ═ 4, N2 ═ 8; or M1 ═ 2, M2 ═ 4, N1 ═ 4, N2 ═ 8; or M1-2, M2-4, N1-8, and N2-16.

Another way that can be implemented is: for the downlink control format information for scheduling the Msg2, different aggregation level sets are adopted for different downlink control format information.

Specifically, if the mobile communication terminal sends the PRACH in the time-frequency resource a set, the detection is performed based on the downlink control format information 1, and the possible aggregation levels of the PDCCH scrambled by the corresponding RA-RNTI are M1, …, and M _ L; if the mobile communication terminal sends PRACH in the time frequency resource B set, the detection is carried out based on the downlink control format information 2, and the possible aggregation levels of PDCCH scrambled by the corresponding RA-RNTI are N1, … and N _ L.

For example: consider L ═ 2, i.e., there are 2 types of polymerization grades; the values for M _ i and N _ i are respectively: m1 ═ 4, M2 ═ 8, N1 ═ 8, N2 ═ 16; or M1 ═ 2, M2 ═ 4, N1 ═ 4, N2 ═ 8; or M1 ═ 2, M2 ═ 4, N1 ═ 4, N2 ═ 8; or M1-2, M2-4, N1-8, and N2-16.

In the embodiment of the invention, the mobile communication terminal can determine the random access preamble of which carrier the random access response is aiming at by establishing the relationship between the RA-RNTI and the target carrier and the time domain/frequency domain position information of the PRACH in the target carrier. Therefore, the invention can realize the random access of the uplink double carriers.

Second embodiment

However, for the case where the SUL carrier is used in pair with the normal carrier, one downlink carrier corresponds to a plurality of uplink carriers. For users transmitting PRACH on the SUL carrier, the coverage is usually poor; for users transmitting PRACH on a TDD carrier, the coverage is usually better; the overhead is large if the aggregation levels of the PDCCH scheduling Msg2 are all designed for users with poor coverage. Therefore, how to design the aggregation level of the PDCCH by the network side device for different coverage situations is a problem to be solved by the embodiment of the present invention.

Referring to fig. 3, fig. 3 is a flowchart illustrating a random access method according to an embodiment of the present invention. As shown in fig. 3, a random access method includes the following steps:

301. the mobile communication terminal sends a random access preamble sequence RAP through a physical random access channel PRACH.

302. And the network side equipment receives RAP sent by the mobile communication terminal through the PRACH.

303. And the network side equipment sends a Physical Downlink Control Channel (PDCCH) scrambled by using a random access radio network temporary identifier (RA-RNTI), wherein the value set of the aggregation level of the PDCCH is related to the transmission information of the PRACH.

304. And the mobile communication terminal receives the PDCCH scrambled by the RA-RNTI sent by the network side equipment.

In the embodiment of the invention, different PDCCH aggregation levels can be designed aiming at users with different coverage, and the value set of the PDCCH aggregation levels is related to the transmission information of the PRACH. Specifically, the value set of the aggregation level of the PDCCH includes K aggregation level values, where K is a positive integer.

In the embodiment of the invention, network side equipment configures PRACH resources of different carriers for a mobile communication terminal, and the mobile communication terminal can select different PRACH resources according to coverage conditions, for example, certain time frequency resources (a time frequency resource A set) are transmitted aiming at a weak coverage user; some time-frequency resources (set of time-frequency resources B) are for strong coverage user transmission. And the mobile communication terminal sends Msg1(Message 1) through the selected physical random access channel PRACH, wherein Msg1 is RAP. After receiving the Msg1 sent by the mobile communication terminal, the network side device can acquire the coverage condition of the mobile communication terminal, for example, a user transmitting PRACH in some time-frequency resources (time-frequency resource a set) is a weak coverage user; and the users transmitting the PRACH in other time frequency resources (the time frequency resource B set) are strong coverage users.

In this way, the network side device determines the aggregation level of the PDCCH for scheduling Msg2 based on the coverage of the mobile communication terminal.

Optionally, the random access method further includes:

the number and/or pattern of reference signals RS is related to the set of values of the aggregation level of the PDCCH.

In the embodiment of the present invention, since the network status can reflect the RS corresponding to the PDCCH, the number and/or pattern of the RS may refer to the value set of the aggregation level of the PDCCH. In view of this, the network side device may transmit a reference signal RS corresponding to the PDCCH. Generally speaking, when the network state is poor, the value set of the aggregation level of the PDCCH is correspondingly large, and the number or pattern of the RS is correspondingly increased; when the network state is better, the value set of the aggregation level of the PDCCH is correspondingly smaller, and the number or the pattern of the RS is correspondingly reduced.

In the embodiment of the present invention, the RS may be a Demodulation Reference Signal (DMRS), and for PDCCHs of different aggregation levels, the density and/or pattern of the DMRS may be different or the same, and one or more aggregation levels correspond to the density and/or pattern of one DMRS. The relationship between the aggregation level and the density and/or pattern of the DMRS may be an explicit or implicit relationship, or set according to a protocol.

One way that can be implemented is: as shown in fig. 3-1, when the aggregation level is 16, the overhead of the corresponding DMRS is 1/2, where in fig. 3-1, 12 REs (Resource elements) of 1 REG (Resource Element Group) are included, the hatched area is the DMRS, and the white area is the information transmission Resource of the PDCCH.

Another way that can be implemented is: as shown in fig. 3-2, when the aggregation level is 8, the overhead of the corresponding DMRS is 1/3, where 12 REs including 1 REG in fig. 3-2, are shaded regions, which are DMRSs, and a white region is an information transmission resource of a PDCCH.

Optionally, the transmission information of the PRACH at least includes resource set information where the PRACH transmission is located, and the resource set information where the PRACH transmission is located may include at least one of information of a carrier carrying the PRACH, location information of the PRACH in a target carrier, or format information of the PRACH.

When the transmission information of the PRACH is information of a carrier carrying the PRACH, the network side device may notify the mobile communication terminal of the information of the carrier carrying the PRACH in a display signaling or implicit binding manner.

Alternatively to this, the first and second parts may,

in one mode, the relationship between the value of the RA-RNTI and a target carrier selected from a plurality of carriers used by the PRACH is indicated by an implicit mode, the implicit mode is that PRACH frequency domain resources of the plurality of carriers are uniformly numbered, and the RA-RNTI corresponds to the frequency domain resources selected by the mobile communication terminal from the PRACH frequency domain resources which are uniformly numbered one by one;

in another embodiment, a relationship between a value of the RA-RNTI and a target carrier selected from a plurality of carriers used by the PRACH is indicated by an explicit method, where the explicit method is to introduce a carrier index parameter into a calculation formula of the RA-RNTI, and values of the carrier index parameters of different carriers are different.

In the embodiment of the invention, in order to enable the mobile communication terminal to distinguish resources of PRACH (physical random access channel) with different carriers, network side equipment can use PDCCH scrambled by RA-RNTI (random access network-radio network temporary identifier), wherein the value of the RA-RNTI is at least related to a target carrier used by the PRACH and time domain and/or frequency domain position information of the PRACH in the target carrier.

It should be noted that the location information of the PRACH in the target carrier may be time domain and/or frequency domain location information of the PRACH in the target carrier, and may be implemented in an explicit or implicit manner.

Further, the value of the RA-RNTI is related to the carrier identifier.

At least two embodiments will be specifically described below.

RA-RNTI＝1+t_id+M*f_id_NR

RA-RNTI＝1+t_id+M*(L_{i_carrier}+f_id_{i_carrier})，

In the embodiment of the invention, by establishing the relationship between the aggregation level of the PDCCH and the transmission information of the PRACH, the network side equipment can design different aggregation levels aiming at different coverage conditions. Therefore, the invention can realize the random access of the uplink double carriers. In addition, different aggregation levels are designed for different coverage situations, and the method has the advantage of reducing overhead.

Referring to fig. 4, an embodiment of the present invention provides a network-side device, as shown in fig. 4, a network-side device 400 includes a transceiver 401, where the transceiver 401 is configured to:

the value of the RA-RNTI at least relates to a target carrier used by the PRACH and selected from a plurality of carriers and the position information of the PRACH in the target carrier.

Alternatively to this, the first and second parts may,

Optionally, the manner of scrambling the PDCCH by using the RA-RNTI includes:

and scrambling the Cyclic Redundancy Check (CRC) information of the downlink control information carried by the PDCCH by using the RA-RNTI, and/or scrambling the downlink control information carried by the PDCCH by using the RA-RNTI.

Optionally, the value set of the aggregation level of the PDCCH is related to transmission information of the PRACH.

Optionally, the value set of the aggregation level of the PDCCH includes K aggregation level values, where K is a positive integer.

Optionally, the transceiver 401 is further configured to:

sending a Reference Signal (RS) corresponding to the PDCCH;

the number and/or pattern of the RSs is related to a value set of the aggregation level of the PDCCH.

Optionally, the transmission information of the PRACH at least includes resource set information where the PRACH transmission is located, and the resource set information where the PRACH transmission is located includes at least one of the following information: and carrying information of the carrier of the PRACH, and position information of the PRACH in the target carrier and format information of the PRACH.

Optionally, the information of the carrier bearing the PRACH is notified to the mobile communication terminal by the network side device in a display signaling or implicit binding manner.

Optionally, a value set of the aggregation level of the PDCCH and the resource set information where the PRACH transmission is located have a corresponding relationship.

Optionally, each resource set in which M types of PRACH transmission are located corresponds to a value set of aggregation levels of a group of PDCCHs, where M is a positive integer.

It should be noted that, in this embodiment, the network-side device 400 may be a network-side device in any implementation manner in the embodiment of the invention shown in fig. 2, and any implementation manner in the embodiment of the invention shown in fig. 2 may be implemented by the network-side device 400 in this embodiment to achieve the same beneficial effects, which is not described herein again.

Referring to fig. 5, an embodiment of the present invention provides another network-side device, as shown in fig. 5, a network-side device 500 includes a transceiver 501, where the transceiver 501 is configured to:

Optionally, the manner of scrambling the PDCCH by using the RA-RNTI includes:

Optionally, the transceiver 501 is further configured to:

sending a Reference Signal (RS) corresponding to the PDCCH;

the number and/or pattern of the Reference Signals (RSs) is related to a value set of an aggregation level of the PDCCH.

It should be noted that, in this embodiment, the network-side device 500 may be a network-side device in any implementation manner in the embodiment of the invention shown in fig. 3, and any implementation manner in the embodiment of the invention shown in fig. 3 may be implemented by the network-side device 500 in this embodiment to achieve the same beneficial effects, which is not described herein again.

Referring to fig. 6, an embodiment of the present invention provides a mobile communication terminal, as shown in fig. 6, a mobile communication terminal 600 includes a transceiver 601, where the transceiver 601 is configured to:

Alternatively to this, the first and second parts may,

the relationship between the value of the RA-RNTI and a target carrier selected from a plurality of carriers used by the PRACH is indicated by an implicit mode, the implicit mode is that PRACH frequency domain resources of the plurality of carriers are uniformly numbered, and the RA-RNTI corresponds to the frequency domain resources selected by the mobile communication terminal from the uniformly numbered PRACH frequency domain resources one by one;

or

And indicating the relationship between the value of the RA-RNTI and a target carrier selected from a plurality of carriers used by the PRACH in an explicit mode, wherein the explicit mode is to introduce carrier index parameters into a calculation formula of the RA-RNTI, and the values of the carrier index parameters of different carriers are different.

Optionally, the manner of scrambling the PDCCH by using the RA-RNTI includes:

Optionally, the transceiver 601 is further configured to:

receiving a Reference Signal (RS) corresponding to the PDCCH sent by the network side equipment;

It should be noted that, in this embodiment, the mobile communication terminal 600 may be a mobile communication terminal of any implementation manner in the embodiment of the invention shown in fig. 2, and any implementation manner in the embodiment of the invention shown in fig. 2 may be implemented by the mobile communication terminal 600 in this embodiment to achieve the same beneficial effects, which is not described herein again.

Referring to fig. 7, an embodiment of the present invention provides another mobile communication terminal, as shown in fig. 7, a mobile communication terminal 700 includes a transceiver 701, where the transceiver 701 is configured to:

Optionally, the manner of scrambling the PDCCH by using the RA-RNTI includes:

Optionally, the transceiver 701 is further configured to:

It should be noted that, in this embodiment, the mobile communication terminal 700 may be a mobile communication terminal of any implementation manner in the embodiment of the invention shown in fig. 3, and any implementation manner in the embodiment of the invention shown in fig. 3 may be implemented by the mobile communication terminal 700 in this embodiment to achieve the same beneficial effects, which is not described herein again.

Referring to fig. 8, another network-side device according to an embodiment of the present invention is shown in fig. 8, where the network-side device 800 includes a memory 801, a processor 802, and a computer program stored in the memory 801 and executable on the processor 802; the processor 802, when executing the program, implements:

In FIG. 8, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 802 and various circuits of memory represented by memory 801 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 802 is responsible for managing the bus architecture and general processing, and the memory 801 may store data used by the processor 802 in performing operations.

Alternatively to this, the first and second parts may,

or

Optionally, the manner of scrambling the PDCCH by using the RA-RNTI includes:

Optionally, when the processor 802 executes the program, the following is further implemented:

sending a Reference Signal (RS) corresponding to the PDCCH;

It should be noted that, in this embodiment, the network-side device may be the network-side device in the embodiment shown in fig. 2, and any implementation of the network-side device in the embodiment shown in fig. 2 may be implemented by the network-side device in this embodiment, and the same beneficial effects are achieved, and details are not described here.

Referring to fig. 9, an embodiment of the present invention provides another network-side device, as shown in fig. 9, the network-side device 900 includes a memory 901, a processor 902, and a computer program stored in the memory 901 and executable on the processor 902; the processor 902, when executing the program, implements:

In fig. 9, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 902, and various circuits, represented by memory 901, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 902 is responsible for managing the bus architecture and general processing, and the memory 901 may store data used by the processor 902 in performing operations.

Optionally, the manner of scrambling the PDCCH by using the RA-RNTI includes:

Optionally, when the processor 902 executes the program, the following is further implemented:

sending a Reference Signal (RS) corresponding to the PDCCH;

It should be noted that, in this embodiment, the network-side device may be the network-side device in the embodiment shown in fig. 3, and any implementation of the network-side device in the embodiment shown in fig. 3 may be implemented by the network-side device in this embodiment, and the same beneficial effects are achieved, and details are not described here.

Referring to fig. 10, another mobile communication terminal according to an embodiment of the present invention is shown in fig. 10, where the mobile communication terminal 1000 includes a memory 1001, a processor 1002, and a computer program stored in the memory 1001 and executable on the processor 1002; the processor 1002, when executing the program, implements:

In fig. 10, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1002 and various circuits of memory represented by memory 1001 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 1002 is responsible for managing the bus architecture and general processing, and the memory 1001 may store data used by the processor 1002 in performing operations.

Alternatively to this, the first and second parts may,

or

Optionally, the manner of scrambling the PDCCH by using the RA-RNTI includes:

Optionally, when the processor 1002 executes the program, the following is further implemented:

It should be noted that, in this embodiment, the mobile communication terminal may be the mobile communication terminal in the embodiment shown in fig. 2, and any implementation of the mobile communication terminal in the embodiment shown in fig. 2 may be implemented by the mobile communication terminal in this embodiment, and the same beneficial effects are achieved, and details are not described here again.

Referring to fig. 11, an embodiment of the present invention provides another mobile communication terminal, as shown in fig. 11, the mobile communication terminal 1100 includes a memory 1101, a processor 1102, and a computer program stored in the memory 1101 and operable on the processor 1102; the processor 1102, when executing the program, implements:

In FIG. 11, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1102, and various circuits, represented by memory 1101, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 1102 is responsible for managing the bus architecture and general processing, and the memory 1101 may store data used by the processor 1102 in performing operations.

Optionally, the manner of scrambling the PDCCH by using the RA-RNTI includes:

Optionally, when the processor 1102 executes the program, the following is further implemented:

It should be noted that, in this embodiment, the mobile communication terminal may be the mobile communication terminal in the embodiment shown in fig. 3, and any implementation of the mobile communication terminal in the embodiment shown in fig. 3 may be implemented by the mobile communication terminal in this embodiment to achieve the same beneficial effects, and details are not described here again.

It can be understood by those skilled in the art that all or part of the steps of implementing the random access method of the network side device provided in the foregoing embodiments may be implemented by hardware related to program instructions, where the program may be stored in a storage medium, and when executed, the program includes the following steps:

Alternatively to this, the first and second parts may,

or

Optionally, the manner of scrambling the PDCCH by using the RA-RNTI includes:

Optionally, the program further includes the following steps when executed:

sending a Reference Signal (RS) corresponding to the PDCCH;

Optionally, the manner of scrambling the PDCCH by using the RA-RNTI includes:

Optionally, the program further includes the following steps when executed:

sending a Reference Signal (RS) corresponding to the PDCCH;

It will be understood by those skilled in the art that all or part of the steps of implementing the random access method of the mobile communication terminal provided in the above embodiments may be implemented by hardware associated with program instructions, where the program may be stored in a storage medium, and when executed, the program includes the following steps:

the value of the RA-RNTI is at least related to a target carrier used by the PRACH and selected from a plurality of carriers and time domain/frequency domain position information of the PRACH in the target carrier.

Alternatively to this, the first and second parts may,

or

Optionally, the manner of scrambling the PDCCH by using the RA-RNTI includes:

Optionally, the program further includes the following steps when executed:

Optionally, the manner of scrambling the PDCCH by using the RA-RNTI includes:

Optionally, the program further includes the following steps when executed:

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

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

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

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A random access method is applied to network side equipment, and is characterized in that the random access method comprises the following steps:

the value of the RA-RNTI is at least related to a target carrier used by the PRACH and selected from a plurality of carriers and time domain and frequency domain position information of the PRACH in the target carrier; or the value set of the aggregation level of the PDCCH is related to the transmission information of the PRACH;

and sending a Reference Signal (RS) corresponding to the PDCCH, wherein the number and/or pattern of the RS is related to a value set of the aggregation level of the PDCCH.

2. The random access method of claim 1, wherein:

or

3. The random access method of claim 1, wherein the PDCCH is scrambled using the RA-RNTI in a manner that:

scrambling the Cyclic Redundancy Check (CRC) information of the downlink control information carried by the PDCCH by using the RA-RNTI; and/or

And scrambling the downlink control information carried by the PDCCH by using the RA-RNTI.

4. The random access method of claim 1, wherein the aggregation level value set of the PDCCH includes K aggregation level values, and K is a positive integer.

5. The random access method of claim 1, wherein the transmission information of the PRACH at least includes resource set information in which the PRACH transmission is located, and the resource set information in which the PRACH transmission is located includes at least one of the following information: and carrying information of the carrier of the PRACH, and position information of the PRACH in the target carrier and format information of the PRACH.

6. The random access method of claim 5, wherein the information of the carrier carrying the PRACH is notified to the mobile communication terminal by the network side device through a display signaling or an implicit binding.

7. The random access method of claim 5, wherein a value set of the aggregation level of the PDCCH corresponds to information of a resource set in which the PRACH is transmitted.

8. The random access method of claim 7, wherein a resource set in which each M types of PRACH transmissions are located corresponds to a value set of an aggregation level of a set of PDCCHs, and M is a positive integer.

9. A random access method applied to a mobile communication terminal is characterized in that the random access method comprises the following steps:

the value of the RA-RNTI is at least related to a target carrier used by the PRACH and selected from a plurality of carriers and time domain and frequency domain position information of the PRACH in the target carrier; or, the value set of the aggregation level of the PDCCH is related to the transmission information of the PRACH;

receiving a Reference Signal (RS) corresponding to the PDCCH; the number and/or pattern of the RSs is related to a value set of the aggregation level of the PDCCH.

10. The random access method of claim 9, wherein:

or

11. The random access method according to claim 9, wherein the PDCCH is scrambled using the RA-RNTI in a manner that:

12. The random access method according to claim 9, wherein the aggregation level value set of the PDCCH includes K aggregation level values, where K is a positive integer.

13. The random access method of claim 9, wherein the transmission information of the PRACH at least includes resource set information where the PRACH transmission is located, and the resource set information where the PRACH transmission is located includes at least one of the following information: and carrying information of the carrier of the PRACH, and position information of the PRACH in the target carrier and format information of the PRACH.

14. The random access method according to claim 13, wherein the information of the carrier carrying the PRACH is obtained by the mobile communication terminal by means of explicit signaling or implicit binding.

15. The random access method of claim 13, wherein a value set of the aggregation level of the PDCCH corresponds to information of a resource set in which the PRACH transmission is located.

16. The random access method of claim 15, wherein a resource set in which each M types of PRACH transmissions are located corresponds to a value set of aggregation levels of a set of PDCCHs, and M is a positive integer.

17. A network-side device, wherein the network-side device comprises a transceiver configured to:

the transceiver is further configured to: sending a Reference Signal (RS) corresponding to the PDCCH; the number and/or pattern of the RSs is related to a value set of the aggregation level of the PDCCH.

18. The network-side device of claim 17, wherein:

or

19. The network side device of claim 17, wherein the PDCCH is scrambled using the RA-RNTI in a manner that:

scrambling the Cyclic Redundancy Check (CRC) information of the downlink control information carried by the PDCCH by using the RA-RNTI;

and/or

20. The network side device of claim 17, wherein a value set of the aggregation level of the PDCCH includes K aggregation level values, where K is a positive integer.

21. The network side device of claim 17, wherein the transmission information of the PRACH at least includes resource set information in which the PRACH transmission is located, and the resource set information in which the PRACH transmission is located includes at least one of the following information: and carrying information of the carrier of the PRACH, and position information of the PRACH in the target carrier and format information of the PRACH.

22. The network side device of claim 21, wherein the information about the carrier carrying the PRACH is notified to the mobile communication terminal by the network side device through a display signaling or an implicit binding.

23. The network side device of claim 21, wherein a value set of the aggregation level of the PDCCH corresponds to resource set information where the PRACH transmission is located.

24. The network side device of claim 23, wherein a resource set in which each M types of PRACH transmissions are located corresponds to a value set of aggregation levels of a set of PDCCHs, and M is a positive integer.

25. A mobile communication terminal, characterized in that the mobile communication terminal comprises a transceiver for:

the transceiver is further configured to: receiving a Reference Signal (RS) corresponding to the PDCCH; the number and/or pattern of the RSs is related to a value set of the aggregation level of the PDCCH.

26. The mobile communication terminal of claim 25, wherein:

or

27. The mobile communication terminal of claim 25, wherein the PDCCH is scrambled using the RA-RNTI in a manner that:

28. The mobile communication terminal of claim 25, wherein the aggregation level value set of the PDCCH includes K aggregation level values, and K is a positive integer.

29. The mobile communication terminal of claim 25, wherein the transmission information of the PRACH at least includes resource set information in which the PRACH transmission is located, and the resource set information in which the PRACH transmission is located includes at least one of the following information: and carrying information of the carrier of the PRACH, and position information of the PRACH in the target carrier and format information of the PRACH.

30. The mobile communication terminal of claim 29, wherein the information about the carrier carrying the PRACH is obtained by the mobile communication terminal through explicit signaling or implicit binding.

31. The mobile communication terminal of claim 29, wherein a value set of the aggregation level of the PDCCH corresponds to resource set information where the PRACH transmission is located.

32. The mobile communication terminal of claim 31, wherein a resource set in which each M types of PRACH transmissions are located corresponds to a value set of an aggregation level of a set of PDCCHs, and M is a positive integer.

33. A communication device comprising a memory, a processor and a computer program stored on the memory and executable on the processor; wherein the processor, when executing the program, implements the random access method of any one of claims 1 to 8, or implements the random access method of any one of claims 9 to 16.

34. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the random access method according to any one of claims 1 to 16.