CN108289329B

CN108289329B - Random access method, base station equipment and user equipment

Info

Publication number: CN108289329B
Application number: CN201710013194.2A
Authority: CN
Inventors: 钱辰; 喻斌; 付景兴; 熊琦; 张英杰; 苏笛
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2017-01-09
Filing date: 2017-01-09
Publication date: 2023-08-29
Anticipated expiration: 2037-01-09
Also published as: CN108289329A

Abstract

The invention discloses a random access configuration method, which comprises the following steps: determining random access resource configuration information including random access resource information for UEs with beam reciprocity and random access resource information for UEs without beam reciprocity; and sending the random access resource configuration information to the UE so as to allow the UE to select corresponding random access resources to send a random access request containing a preamble sequence according to the self beam reciprocity capability and the random access resource configuration information. Compared with the prior art, the invention divides the available random access resources into two types, one type is configured for the UE with beam reciprocity, the other type is configured for the UE without beam reciprocity, the random access processes of the two types of UE are integrated, the degradation of the UE access performance caused by improper resource configuration is avoided, and the overall access performance of the high-frequency communication system is obviously improved.

Description

Random access method, base station equipment and user equipment

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a random access method, a base station device, and a user equipment.

Background

With the rapid development of the information industry, the growing demands from the mobile internet and the internet of things bring unprecedented challenges to future mobile communication technologies. Extensive 5G (fifth generation mobile communication system) technical research is being conducted in the communication industry and academia currently, and the problems that the throughput of a system is remarkably improved, the user experience is consistent, the expansibility is used for supporting the Internet of things, time delay, energy efficiency, cost, network flexibility, emerging services, flexible spectrum utilization and the like are solved.

A Random Access (RA) procedure is an important step for establishing a communication link between a User Equipment (UE) and a base station in a wireless communication system, and the base station allocates an ID for identifying the UE. The performance of random access directly affects the user experience. In conventional wireless communication systems, such as LTE and LTE-Advanced, a random access procedure is applied to the scenarios of initial link establishment, cell handover, uplink re-establishment, RRC connection re-establishment, and the like. The random access procedure may be classified into Contention-based random access (content-based Random Access) and non-Contention-based random access (content-free Random Access) according to whether the UE monopolizes the preamble sequence resource. For a non-contention based random access procedure, the UE transmits a random access request using a preamble sequence (i.e., an exclusive preamble sequence) designated by the base station. For the contention-based random access procedure, the UE does not monopolize the preamble sequence resource, and when each UE tries to establish an uplink, the UE selects a preamble sequence from the same preamble sequence resource pool and initiates a random access request to the base station by using the selected preamble sequence, so that there is a possibility that a plurality of UEs select the same preamble sequence to initiate random access to the base station. Therefore, the collision resolution mechanism is the key to the performance of random access.

Millimeter wave communication is a key technology that 5G may employ. The millimeter wave technology improves the carrier frequency to the millimeter wave frequency band, so that the available bandwidth is greatly increased, and the transmission rate of the system can be greatly improved. To combat the high fading, high loss, etc. characteristics of millimeter wave band wireless channels, millimeter wave communication systems typically employ Beamforming (Beamforming) techniques, i.e., by using weighting factors to concentrate the beam energy in a certain direction. When wireless communication is carried out, the base station and the UE search out the optimal beam pair in a polling mode and the like, so that the receiving signal-to-noise ratio of the user side is maximized. Since the UE and the base station do not know the direction of the optimal beam pair when establishing a connection, the random access procedure in a millimeter wave communication system faces a great challenge. In the existing millimeter wave communication random access process, different processes and channel structures are respectively designed for the situations of beam reciprocity and no beam reciprocity, but before the random access process is carried out, a base station cannot know the beam reciprocity of UE, so that a proper random access channel resource subset structure and access process cannot be directly selected for the UE, the random access performance of the UE is reduced, and the success rate of random access and the experience of users are influenced.

In view of the foregoing, it is necessary to provide a random access method, a base station device, and a user equipment that can solve the above-mentioned problems.

Disclosure of Invention

The invention aims at: the method, the base station equipment and the user equipment which are simultaneously suitable for the two conditions of beam reciprocity and no beam reciprocity of the UE are provided, the signaling interaction cost is low, the service delay is short, the data transmission flow is simple, and the ideal access efficiency is realized.

In order to achieve the above object, the present invention provides a random access configuration method, which includes the steps of:

determining random access resource configuration information including random access resource information for UEs having beam reciprocity and random access resource information for UEs not having beam reciprocity;

and sending the random access resource configuration information to the UE so as to allow the UE to select a corresponding random access resource to send a preamble sequence according to the self beam reciprocity capability and the random access resource configuration information.

Preferably, the determining random access resource configuration information includes: and determining random access resource configuration information according to the beam reciprocity capability of the local terminal.

Preferably, the random access resource for the UE with beam reciprocity or/and the random access resource for the UE without beam reciprocity comprises: the number of preamble sequence repetitions contained in each random access channel.

Preferably, the sending random access resource configuration information to the UE includes: and sending random access resource configuration information to the UE through a synchronous signal block of downlink synchronization.

Preferably, each of the synchronization signal blocks carries random access resource information for UEs with beam reciprocity and random access resource information for UEs without beam reciprocity.

Preferably, the random access resource carried by each synchronization signal block for the UE with beam reciprocity includes: relevant information of a UE random access channel resource subset with beam reciprocity correspondingly; the relevant information of the corresponding random access channel resource subset of the UE with beam reciprocity is used for determining: the time-frequency resource position of the random access channel resource subset of the UE with beam reciprocity is corresponding, or the time-frequency resource position of one random access channel in the random access channel resource subset of the UE with beam reciprocity is corresponding; the random access resource carried by each synchronization signal block and used for the UE without beam reciprocity comprises the following steps: relevant information of a UE random access channel resource subset without beam reciprocity is corresponding; the information about the subset of corresponding UE random access channel resources without beam reciprocity is used to determine: and the time-frequency resource position of the random access channel resource subset of the UE which does not have the beam reciprocity is corresponding, and the number of the random access channels contained in the random access channel resource subset of the UE which does not have the beam reciprocity is corresponding.

Preferably, the information related to the UE random access channel resource subset with beam reciprocity includes: time-frequency resource allocation information (indicating a specific value of time-frequency resource position coordinates) of a random access channel resource subset of the UE with beam reciprocity, or time-frequency resource allocation information (indicating a specific value of time-frequency resource position coordinates) of a random access channel of the random access channel resource subset of the UE with beam reciprocity; the relevant information of the corresponding random access channel resource subset of the UE without beam reciprocity comprises the following steps: and the time-frequency resource allocation information (specific numerical value representing the position coordinates of the time-frequency resources) of the UE random access channel resource subset without beam reciprocity is corresponding to the number of the random access channels contained in the UE random access channel resource subset without beam reciprocity.

Preferably, the information related to the UE random access channel resource subset with beam reciprocity includes: time-frequency resource allocation information (which refers to a specific value representing the position coordinates of time-frequency resources) of the random access channel resource subset of the UE with beam reciprocity, the number of random access channels and the random access channel interval contained in the random access channel resource subset of the UE with beam reciprocity.

Preferably, the random access resource carried by each synchronization signal block for the UE with beam reciprocity further includes: the UE preamble sequence index range with beam reciprocity; the random access resource carried by each synchronization signal block and used for the UE without beam reciprocity further comprises: the UE preamble sequence index range does not have beam reciprocity.

Preferably, the random access resource carried by each synchronization signal block for the UE with beam reciprocity includes: the UE preamble sequence with beam reciprocity and the related information of the UE random access channel resource with beam reciprocity are provided; the related information of the random access channel resource of the UE with beam reciprocity is used for determining: the time-frequency resource positions of the random access channel resource subsets of the UE with beam reciprocity are corresponding, or the time-frequency resource positions of the random access channels contained in the random access channel resource subsets of the UE with beam reciprocity are corresponding; the random access resource carried by each synchronization signal block and used for the UE without beam reciprocity comprises the following steps: the UE preamble sequence without beam reciprocity and the related information of the UE random access channel resource without beam reciprocity are provided correspondingly; the relevant information of the corresponding UE random access channel resources without beam reciprocity is used for determining: and the time-frequency resource positions of all random access channel resource subsets in the random access channel resources of the UE without beam reciprocity are corresponding, and the number of the random access channels contained in the random access channel resource subsets.

Preferably, the related information of the random access channel resource of the UE with beam reciprocity includes: time-frequency resource allocation information of each random access channel resource subset in the random access channel resources of the UE with beam reciprocity correspondingly, or time-frequency resource allocation information of each random access channel contained in each random access channel resource subset in the random access channel resources of the UE with beam reciprocity correspondingly; the relevant information of the corresponding UE random access channel resources without beam reciprocity comprises: and the time-frequency resource allocation information of each random access channel resource subset in the random access channel resources of the UE without beam reciprocity is corresponding to the number of the random access channels contained in the random access channel resource subsets.

Preferably, after the step of sending the random access resource configuration information to the UE to allow the UE to select a corresponding random access resource sending preamble sequence according to the self beam reciprocity capability and the random access resource configuration information, the method includes: detecting a preamble sequence sent by the UE on the time-frequency resource indicated by the random access resource configuration information, determining an optimal random access channel of the UE according to a detection result, and sending the optimal random access channel information of the UE to the UE through a random access response.

In order to achieve the above object, the present invention further provides a random access request method, which is characterized in that: the method comprises the following steps:

receiving random access resource configuration information sent by a base station, wherein the random access resource configuration information comprises random access resource information for UE with beam reciprocity and random access resource information for UE without beam reciprocity;

and selecting corresponding random access resources to transmit a preamble sequence according to the beam reciprocity capability of the local terminal and the random access resource configuration information.

Preferably, the random access resource configuration information sent by the receiving base station includes: and receiving the random access resource configuration information sent by the base station through a synchronous signal block of downlink synchronization.

Preferably, after the step of selecting the corresponding random access resource transmission preamble sequence according to the beam reciprocity capability and the random access resource configuration information of the home terminal, the method comprises the following steps: and receiving a random access response fed back by the base station aiming at the preamble sequence, determining the optimal sending beam direction of the local terminal according to the random access response, and sending a message III by using the optimal sending beam direction.

In order to achieve the above object, the present invention also provides a base station apparatus for random access configuration, comprising:

a configuration information determining module for determining random access resource configuration information including random access resource information for UEs having beam reciprocity and random access resource information for UEs not having beam reciprocity;

and the transmission configuration information module is used for transmitting the random access resource configuration information to the UE so as to allow the UE to select a corresponding random access resource transmission preamble sequence according to the self beam reciprocity capability and the random access resource configuration information.

In order to achieve the above object, the present invention also provides a ue for random access request, which is characterized by comprising:

a receiving configuration information module, configured to receive random access resource configuration information sent by a base station, where the random access resource configuration information includes random access resource information for a UE with beam reciprocity and random access resource information for a UE without beam reciprocity;

and the sending preamble sequence module is used for selecting a corresponding random access resource to send the preamble sequence according to the beam reciprocity capability of the local terminal and the random access resource configuration information.

Compared with the prior art, the technical effects of the invention include but are not limited to: the available random access resources are divided into two types, one type is configured for the UE with beam reciprocity, the other type is configured for the UE without beam reciprocity, the random access processes of the two types of UE are integrated, the degradation of the UE access performance caused by improper resource configuration is avoided, and the overall access performance of the high-frequency communication system is remarkably improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a flow chart of a random access configuration method of the present invention;

fig. 2 is a flow chart of the random access request method of the present invention;

FIG. 3 is a schematic diagram of the communication interactions of the random access procedure of example 1;

fig. 4 is a schematic diagram of a first type of random access channel resource subset structure in embodiment 1;

fig. 5 is a schematic diagram of a process of determining an optimal transmit beam direction by the UE in embodiment 1;

Fig. 6 is a schematic diagram of a second type of random access channel resource subset structure in embodiment 1;

FIG. 7 is a schematic diagram of the structure of the preamble sequence of example 1;

fig. 8 is a schematic diagram of random access time-frequency resource distribution in embodiment 1;

fig. 9 is a schematic diagram of a mapping relationship between a synchronization signal block and a random access channel resource subset in embodiment 1;

fig. 10 is a schematic diagram of a correspondence between a synchronization signal block and a random access channel resource subset in embodiment 2;

fig. 11 is a schematic diagram of another correspondence between synchronization signal blocks and random access channel resource subsets in embodiment 2;

fig. 12 is a schematic diagram of a mapping relationship between a synchronization signal block and a random access channel resource subset in embodiment 3;

fig. 13 is a block diagram of a base station apparatus for random access configuration according to the present invention;

fig. 14 is a block diagram of a user equipment for random access request according to the present invention.

Detailed Description

In order to make the present embodiment better understood by those skilled in the art, the technical solution in the present embodiment will be clearly and completely described in the following with reference to the accompanying drawings in the embodiment of the present embodiment.

In the present description and in the claims and in the above description of the figures, a number of operations are included that appear in a particular order, but it should be clearly understood that the operations may be performed out of order or performed in parallel in the order in which they appear, the sequence numbers of the operations such as 101, 102, etc. are merely used to distinguish between the various operations, and the sequence numbers themselves do not represent any order of execution. In addition, the flows may include more or fewer operations, and the operations may be performed sequentially or in parallel. It should be noted that, the descriptions of "first" and "second" herein are used to distinguish different messages, devices, modules, etc., and do not represent a sequence, and are not limited to the "first" and the "second" being different types.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other examples, which a person skilled in the art would obtain without making any inventive effort, based on the examples in this detailed description are within the scope of the protection of this detailed description.

In order to ensure coverage rate, the communication system of the embodiment works in a high-frequency band (for example, millimeter wave frequency band) environment, and adopts a beamforming technology, and a base station and a UE acquire beamforming gain by using a mutually matched beam pair so as to overcome larger path loss in the high-frequency band. The random access method of the present embodiment may be applied to a contention-based random access procedure or a non-contention-based random access procedure.

Referring to fig. 1, the random access configuration method of the present embodiment includes the following steps:

step 101, determining random access resource configuration information, wherein the random access resource configuration information comprises random access resource information for UE with beam reciprocity and random access resource information for UE without beam reciprocity;

Step 102, the random access resource configuration information is sent to the UE, so that the UE can select corresponding random access resources to send random access requests containing a preamble sequence according to the self beam reciprocity condition and the random access resource configuration information.

Referring to fig. 2, the random access request method of the present embodiment includes the following steps:

step 201, receiving random access resource configuration information sent by a base station, wherein the random access resource configuration information comprises random access resource information for beam reciprocal UE and random access resource information for non-beam reciprocal UE;

step 202, according to the beam reciprocity condition of the local terminal and the random access resource configuration information, selecting corresponding random access resources to transmit a random access request containing a preamble sequence.

Example 1

Referring to fig. 3, a complete process of completing random access by the cooperation of the random access configuration method of the present embodiment and the random access request method of the present embodiment will be described below by taking a contention-based random access scenario as an example.

In step 301, the base station classifies the random access resource configuration information into two types, the first type is the random access resource information used when the UE side has beam reciprocity, and the second type is the random access resource information used when the UE side does not have beam reciprocity.

The random access resource is a resource for the UE to transmit a random access request to the base station. The random access resources include a subset of random access channel resources or time-frequency resources, preamble sequence resources, etc. of the random access channel. The UE determines information such as the structure of a random access channel resource subset, the structure of a preamble sequence and the like according to the usable random access resources, and further determines the structure of a random access request sent to the base station.

Whether the UE-side beam reciprocity is true affects the structure of the random access channel resource subset.

Specifically, if the UE side has beam reciprocity, the random access channel resource subset may be composed of only one random access channel, and the random access channel resource subset structure of the first type of random access resource is shown in fig. 4. In fig. 4, the random access channel resource subset is composed of CP (Cyclic prefix), preamble sequence and GT (Guard Time). When the UE performs downlink synchronization, the synchronization signal of the base station is detected by means of beam scanning and receiving, and the optimal receiving beam direction of the UE is determined, and then the optimal transmitting beam direction of the UE is determined according to beam reciprocity, and fig. 5 shows an example of the process of determining the optimal transmitting beam direction by the UE. Therefore, when the UE having beam reciprocity transmits a random access request using the first type of random access resources, the UE transmits a random access request signal on the random access channel resource subset using the optimal transmit beam direction of the UE determined through the above procedure.

If the UE side does not have beam reciprocity, the random access channel resource subset needs to be composed of a plurality of random access channels, and one possible random access channel resource subset structure of the second type of random access resources is shown in fig. 6. In fig. 6, one random access channel resource subset is composed of N random access channels, the first N-1 random access channels are composed of CP, preamble sequence, and the last random access channel is composed of CP, preamble sequence, and GT. Since the UE does not have beam reciprocity and cannot determine the optimal transmit beam direction of the UE by detecting the synchronization signal, when the UE that does not have beam reciprocity transmits a random access request using the second type of random access resource, the UE transmits a random access request signal using different transmit beam directions on a plurality of random access channels of the subset of random access channel resources, and each random access channel transmits the same or different preamble sequences. Thus, the base station side can determine the optimal transmitting beam direction of the UE through the detection of the random access request, and feed back the optimal transmitting beam direction to the UE through a random access response (Random Access Response, RAR).

In step 302, the base station determines the first type of random access resource information and the second type of random access resource information according to the self beam reciprocity (with beam reciprocity or without beam reciprocity).

Whether the beam reciprocity at the base station side is established affects the structure of the preamble sequence. Therefore, the base station needs to reasonably configure the random access channel resource subset structure and the preamble sequence structure according to the beam reciprocity condition of the base station side and the UE side, and determine the random access resource configuration information.

Specifically, if the base station side does not have beam reciprocity, the base station needs to receive the random access request signal in a beam scanning manner to determine the optimal receiving beam direction of the base station, and the preamble sequence needs to be repeated multiple times, and one possible random access channel resource subset or random access channel structure is shown in fig. 7. In fig. 7, the random access channel resource subset or the random access channel is composed of CPs, a preamble sequence and a GT (GT may be omitted), the preamble sequence is repeated multiple times in each random access channel resource subset or the random access channel, and the repetition times of the preamble sequence are related to the beam direction range that needs to be scanned at the base station side. The UE transmits multiple repeated preamble sequence sub-sequences on a subset of the random access channel resources or random access channels, so that the base station can obtain the optimal reception beam direction of the base station by scanning and detecting the random access request transmitted by the UE.

The base station without beam reciprocity can acquire the optimal transmitting beam direction of the base station through a UE measurement mode. The UE measures the downlink synchronous signal of the base station to obtain the optimal sending beam direction of the base station, and informs the base station in an implicit informing way. One possible way is to divide the preamble sequences into groups that are mutually exclusive, the preamble sequences in each group representing one base station transmit beam direction. After the UE determines the optimal transmit beam direction of the base station through the downlink synchronization process, the UE selects a preamble sequence group corresponding to the optimal transmit beam direction, and selects one preamble sequence from the preamble sequence groups with equal probability for transmitting the random access request. Another possibility is to distinguish between different transmit beam directions by time-frequency resources. For example, a plurality of mutually orthogonal random access channel resource subset time-frequency resource locations are reserved, each random access channel resource subset time-frequency resource location corresponding to a transmit beam direction. After the UE determines the optimal transmitting beam direction of the base station through the downlink synchronization process, selecting the time-frequency resource position of the random access channel resource subset corresponding to the optimal transmitting beam direction for transmitting the random access request. The directions of the transmission beams can be differentiated in a time division manner or in a frequency division manner, for example, the time domain positions of the time-frequency resources corresponding to different transmission beams are the same, but are orthogonal in the frequency domain; or the frequency domain positions of the time-frequency resources corresponding to different transmission beams are the same, but the time domain positions are different.

If the base station side has beam reciprocity, the base station only needs to know the optimal transmitting beam direction of the base station, and can know the optimal receiving beam direction of the base station through the beam reciprocity. The base station can prescribe the corresponding relation between the downlink synchronous signal and the random access channel resource subset, the UE obtains the optimal sending beam direction of the base station through detecting the synchronous signal, and then the optimal sending beam direction of the base station is transmitted to the base station through the random access request. The base station does not need to receive the random access request signal in a beam scanning manner to determine the optimal reception beam direction of the base station, and the preamble sequence for random access does not need to be transmitted in a repeated manner.

The process of determining the first type random access resource information and the second type random access resource information by the base station according to the self beam reciprocity is described in detail below. Referring to fig. 8, in this embodiment, the base station distinguishes two types of random access resources according to the time domain position of the time-frequency resources of the random access channel resource subset. In other embodiments, the base station may also distinguish two types of random access resources according to the frequency domain location of the time-frequency resources of the random access channel resource subset, and the process is similar to that of the present embodiment, and will not be described in detail.

In fig. 8, the time-frequency resources of the first type of random access channel resource subset and the time-frequency resources of the second type of random access channel resource subset are distributed in different time slots or different time slot groups, and the two types of random access channel resource subsets are continuously distributed in the time domain, and in other examples, the random access channel resource subsets may also be discretely distributed in the time domain. For the first type of random access resources, the time-frequency resources of the random access channel resource subset include time-frequency resource positions occupied by a plurality of random access channel resource subsets (each random access channel resource subset is composed of a random access channel), or time-frequency resource positions occupied by a plurality of random access channels (each random access channel resource subset is composed of a plurality of random access channels). For the second type of random access resources, the time-frequency resources of the random access channel resource subset include time-frequency resource positions occupied by a plurality of random access channel resource subsets (one random access channel resource subset is composed of a plurality of random access channels).

The first type of random access resources comprises a plurality of random access channel resource subsets (each random access channel resource subset is composed of a random access channel) or a plurality of random access channels (each random access channel resource subset is composed of a plurality of random access channels), each random access channel resource subset corresponds to a base station transmitting beam direction, and after the UE determines the optimal transmitting beam direction of the base station, a random access request is transmitted on a corresponding time-frequency resource position so as to implicitly transfer information of the optimal transmitting beam direction of the base station to the base station. The first type of random access resources also includes a number of preamble sequence repetitions N transmitted by the UE on each random access channel. The second type of random access resource includes a plurality of random access channel resource subsets (one random access channel resource subset is composed of a plurality of random access channels), and the number of preamble sequence repetitions N transmitted on each random access channel by the number M, UE of random access channels included in the random access channel resource subset. When the base station has beam reciprocity, n=1; when the base station does not have beam reciprocity, the base station determines N according to the number of received beams of the base station, wherein N is an integer larger than 1.

In step 303, the base station transmits random access resource configuration information to the UE through a plurality of synchronization signal blocks (Synchronize Signal Block, SS blocks) of downlink synchronization, wherein different synchronization signal blocks are transmitted using different transmission beam directions.

Referring to fig. 9, each synchronization signal block carries first-type random access resource information and second-type random access resource information. The information carried by each synchronization signal block therefore includes: the first type of random access time-frequency resource location, the second type of random access time-frequency resource location, and the number M, UE of random access channels included in the subset of random access channel resources are the number N of preamble sequence repetitions transmitted on each random access channel. I.e. each synchronization signal block corresponds to a subset of random access channel resources (or random access channels) of a first type and a subset of random access channel resources of a second type.

Step 304, the ue receives the random access resource configuration information through a plurality of synchronization signal blocks of downlink synchronization.

After the UE completes the downlink synchronization of the initial access, the UE acquires the random access resource configuration information through a synchronization signal block.

In step 305, the ue selects the first type of random access resource or the second type of random access resource according to the random access resource configuration information and the self beam reciprocity, generates a random access request, and sends a random access request signal to the base station.

If the UE has beam reciprocity, selecting a first type of random access resource; and if the UE does not have beam reciprocity, selecting a second type of random access resource. The UE selects random access resources to determine a random access channel resource subset structure, a preamble sequence structure and the like, and selects a transmitted preamble sequence in a preamble sequence resource pool with equal probability, generates a random access request signal and transmits the random access request signal to the base station.

In step 306, the base station detects the random access request signal on the two types of random access time-frequency resources, and feeds back a random access response to the UE.

And if the base station detects the preamble sequence of the UE, the base station transmits a random access response on the corresponding downlink time-frequency resource. If the base station detects the preamble sequence on the first type of random access time-frequency resources, the random access response contains the detected preamble sequence, the RA-RNTI corresponding to the detected random access channel resource subset, the time-frequency resources allocated for the next uplink transmission of the UE, TA (Timing Advance) determined according to the time delay estimation between the base station and the UE, the allocated Cell radio network temporary identifier (Cell-Radio Network Temporary Identifier, C-RNTI) and other information. If the base station detects the preamble sequence on the second type of random access time-frequency resource, the random access response contains information of optimal sending wave beam of the UE besides the information, and the information can be implicitly notified through the index of the random access channel with the strongest receiving energy of the preamble sequence. That is, for the preamble sequence detected on the second type of random access time-frequency resource, the random access response should also include the ID of the optimal transmit beam of the UE, or index information of the random access channel.

In step 307, the ue receives the random access response and transmits Msg3 (message three).

After transmitting the preamble sequence, the UE detects a random access response within a random access response window. If the preamble sequence and the RA-RNTI in the random access response are detected to be matched with the preamble sequence and the random access time-frequency resource sent by the user, the correct random access response is judged to be received, and the Msg3 is sent. If the UE sends the random access request on the second type random access time-frequency resource, the direction of the sending beam is adjusted according to the optimal sending beam information of the UE in the random access response, and Msg3 is sent. The Msg3 contains information such as UE user terminal identification and RRC connection request.

In step 308, the base station receives the Msg3 and sends a conflict resolution identifier to the UE, thereby completing the random access procedure.

The base station transmits a conflict resolution identity to the UE, including the user terminal identity of the UE that wins the conflict resolution. After detecting the self-contained identification, the UE upgrades the temporary C-RNTI into the C-RNTI, sends an ACK signal to the base station, completes the random access process, and waits for the scheduling of the base station. Otherwise, the UE will start a new random access procedure after a delay.

Embodiment 1 details the application of the random access method of the present embodiment to a contention-based random access procedure, and the random access method of the present embodiment is also applicable to a non-contention-based random access procedure.

In a non-contention based random access scenario, a base station reserves a portion of a preamble sequence for a non-contention based random access procedure. For the UE needing to initiate non-competitive random access, the base station configures a random access preamble sequence for the UE from the reserved preamble sequence. If the base station can acquire the UE side beam reciprocity condition, the first type random access resource or the second type random access resource is allocated according to the UE side beam reciprocity condition. If the base station can not know the beam reciprocity condition at the UE side, the first type of random access resource and the second type of random access resource are allocated at the same time. The base station informs the UE of the configured preamble sequence and other random access resource configuration information through a downlink control channel, a downlink shared channel or system information.

The UE selects corresponding random access resources (when the base station cannot acquire the beam reciprocity of the UE) according to the random access resource configuration information and the beam reciprocity of the UE, or directly generates and transmits a random access request signal according to the random access resources and the preamble sequence designated by the base station (when the base station can acquire the beam reciprocity of the UE).

And after the base station detects the preamble sequence, the base station transmits a random access response in the downlink shared channel. And the UE completes the random access process after receiving the random access response.

Example 2

In the scheme described in embodiment 1, the base station distinguishes two types of random access resources in a time division manner, that is, according to the time domain positions of the time-frequency resources of the subset of random access channel resources, and this embodiment describes a random access scheme in which the base station uses code division to distinguish two types of random access resources, where the same parts as those in embodiment 1 are not described in detail in this embodiment.

In step 401, the base station classifies the random access resource configuration information into two types, the first type is the random access resource information for the case that the UE side has beam reciprocity, and the second type is the random access resource information for the case that the UE side does not have beam reciprocity.

The base station divides the available preamble sequences into two types, wherein the first type of preamble sequences are configured for the UE with beam reciprocity, and the second type of preamble sequences are configured for the UE without beam reciprocity. The two types of leader sequences do not intersect each other. The base station can adjust the number of the two types of preamble sequences according to the proportion of the UE with reciprocity and the UE without reciprocity in the UE which is accessed to the network currently.

For the time-frequency resources of the random access channel resource subset, the scheme of the embodiment is not distinguished any more for the UEs with different beam reciprocity situations. The random access channel resource subset time-frequency resources of the present embodiment are periodically and repeatedly distributed in the time domain (in other embodiments, the time domain may also be the frequency domain), and the UE with reciprocity and the UE without reciprocity share the same random access channel resource subset time-frequency resources, so that possible interference and collision are avoided by using different preamble sequences.

Two arrangements of periodically and repeatedly distributing the time-frequency resources of the random access channel resource subset in the time domain are given below. (1) Each random access channel resource subset is continuously or discretely distributed in the time domain and is periodically repeated in the time domain independently. (2) The plurality of random access channel resource subsets are continuously distributed to form random access channel resources, and are periodically and repeatedly distributed in a group mode in a time domain. For example, a random access channel resource having the same number of subsets of random access channel resources appears every k time slots in the time domain.

In step 402, the base station determines the first type of random access resource information and the second type of random access resource information according to the self beam reciprocity (with or without beam reciprocity).

The first type of random access resources includes a range of first type preamble sequence indexes, and a preamble sequence repetition number N transmitted by the UE on each random access channel resource subset. For the arrangement (1) of the time-frequency resources of the random access channel resource subsets in step 401, the second type of random access resources includes a range of the second type of preamble sequence indexes, and the number of preamble sequence repetitions N sent by the maximum number I, UE of the random access channel resource subsets that can be used by the UE on each random access channel resource subset. For the arrangement (2) of the time-frequency resources of the random access channel resource subsets in step 401, the second type of random access resources includes a range of the second type of preamble sequence indexes, and the number of preamble sequence repetitions N sent by the number J, UE of the random access channel resource subsets included in the random access channel resources on each random access channel resource subset. The maximum number I of the random access channel resource subsets which can be used by the UE or the number J of the random access channel resource subsets which are contained in the random access channel resources are used for providing the UE, so that the UE can transmit random access request signals on each random access channel resource subset by using different transmission beam directions.

In this embodiment, the UE with reciprocity and the UE without reciprocity share the same time-frequency resource of the subset of random access channel resources, so the random access resource configuration information needs to include the time-frequency resource information of random access in addition to the first type of random access resources and the second type of random access resources. For the arrangement (1) of the time-frequency resources of the random access channel resource subset in step 401, the random access time-frequency resource information includes time-frequency resource allocation information (indicating a specific value of the position coordinate of the time-frequency resource) of the random access channel resource subset and effective period information of the time-frequency resource allocation information (indicating a specific value of the position coordinate of the time-frequency resource). For the arrangement (2) of the time-frequency resources of the random access channel resource subset in step 401, the random access time-frequency resource information includes time-frequency resource allocation information (which refers to a specific value representing the position coordinate of the time-frequency resource) of the first random access channel resource subset of the random access channel resources.

In step 403, the base station transmits random access resource configuration information to the UE through a plurality of synchronization signal blocks in downlink synchronization, where different synchronization signal blocks are transmitted using different transmission beam directions.

Each synchronization signal block carries random access resource configuration information (including first type random access resources, second type random access resources and random access time-frequency resource information) sent by the base station.

For the arrangement (1) of the random access channel resource subset time-frequency resources in step 401, the corresponding relationship between the synchronization signal block and the random access channel resource subset (random access time-frequency resource location) is shown in fig. 10. For the arrangement (2) of the random access channel resource subset time-frequency resources in step 401, the corresponding relationship between the synchronization signal block and the random access channel resource subset (random access time-frequency resource location) is shown in fig. 11.

In step 404, the ue receives random access resource configuration information through a plurality of synchronization signal blocks of downlink synchronization.

Step 405, the ue selects a first type of random access resource or a second type of random access resource according to the random access resource configuration information and the self beam reciprocity, generates a random access request, and sends a random access request signal to the base station.

If the UE has beam reciprocity, a preamble sequence is selected from the first class of preamble sequence indexes with equal probability, and a random access request signal is sent on one random access channel resource subset of the random access channel resource subsets indicated by the synchronization signal block (the arrangement mode (1) of the random access channel resource subsets and time-frequency resources for step 401) or on the random access channel resource subset of the random access channel resources appearing periodically (the arrangement mode (2) of the random access channel resource subsets and time-frequency resources for step 401) by using the selected preamble sequence.

If the UE does not have beam reciprocity, selecting a preamble sequence in the second class of preamble sequence indexes with equal probability, and using the selected preamble sequence to transmit a random access request signal on I random access channel resource subsets that periodically occur starting from the first random access channel resource subset indicated by the synchronization signal block (for step 401, the arrangement mode (1) of the time-frequency resources of the random access channel resource subsets); or transmitting a random access request signal on the random access channel resources indicated by the synchronization signal block (the random access channel resources consist of J random access channel resource subsets) (the arrangement mode (2) of the random access channel resource subsets in time-frequency resource for step 401).

In step 406, the base station detects a random access request signal on the random access channel resource subset or the random access channel resource indicated by the random access resource configuration information, and feeds back a random access response to the UE.

And if the base station detects the preamble sequence of the UE, the base station transmits a random access response on the corresponding downlink time-frequency resource. If the base station detects the first type of preamble sequence, the random access response comprises the detected preamble sequence, RA-RNTI corresponding to the detected random access channel resource subset, time-frequency resources allocated for the next uplink transmission of the UE, TA determined according to time delay estimation between the base station and the UE, the allocated cell wireless network temporary identifier and the like. If the base station detects the second type of preamble sequence, the random access response contains information of optimal transmission beam of the UE in addition to the information, and the information can be implicitly notified through the index of the random access channel with the strongest received energy of the preamble sequence. I.e. for the case that the second type of preamble sequence is detected, the random access response should also contain the ID of the optimal transmit beam of the UE, or index information of the random access channel.

In step 407, the ue receives the random access response and sends Msg3 (message three).

In step 408, the base station receives the Msg3 and sends a conflict resolution identifier to the UE, thereby completing the random access procedure.

The method provided in this embodiment is equally applicable to non-contention based random access procedures. Specifically, to support the non-contention based random access procedure, the base station needs to divide the total available random access preamble sequences into two classes, one for the contention based random access procedure and the other for the non-contention based random access procedure. If the base station cannot know whether the UE has beam reciprocity, each type of preamble sequence is further divided into the preamble sequences used in the random access process for the UE with beam reciprocity and the UE without beam reciprocity. If the base station is able to determine whether the UE has beam reciprocity, the preamble sequence for the non-contention based random access procedure does not need to be further grouped.

Example 3

The present embodiment describes another random access scheme in which the base station uses code division to distinguish two types of random access resources, which is a further improvement on the scheme of embodiment 2. In this embodiment, the same parts as those in embodiment 2 are not described in detail, and only different parts thereof will be described.

In this embodiment, the arrangement manner of the time-frequency resources of the random access channel resource subsets is the same as the arrangement manner (2) of the time-frequency resources of the random access channel resource subsets described in step 401 of embodiment 2, that is, the random access channel resources are formed by continuously distributing a plurality of random access channel resource subsets, and are periodically and repeatedly distributed in a group manner in the time domain (or the frequency domain), where each random access channel resource subset is composed of a plurality of random access channels. This embodiment differs from embodiment 2 in that: the subset of random access channel resources is used by UEs that do not have beam reciprocity, and the random access channel may be used by UEs that do have beam reciprocity.

Referring to fig. 12, the random access channel resources are composed of a plurality of random access channel resource subsets, each of which is composed of a plurality of random access channels. Each synchronization signal block carries time-frequency resource allocation information (which refers to a specific value representing the position coordinates of time-frequency resources) of the first random access channel of a random access channel resource subset, that is, each synchronization signal block corresponds to a random access channel resource subset. One random access channel resource subset may be used for UEs without beam reciprocity to transmit preamble sequences on multiple random access channels therein. And one random access channel of the random access channel resource subset may be used for a UE having beam reciprocity to transmit a preamble sequence thereon.

A subset of random access channel resources has multiple random access channels available for use by UEs with beam reciprocity. The random access channel specifically used by the UE with beam reciprocity may be configured by the base station through a broadcast channel or system information in the downlink synchronization signal block, or may be randomly selected by the UE in an equiprobable manner. When the random access channel used by the UE is configured by the base station, the first type of random access resource includes a range of a first type of preamble sequence index, time-frequency resource allocation information (which refers to a specific value representing a time-frequency resource position coordinate) of a first random access channel of the random access channel resource subset, a position of the random access channel used by the UE in the random access channel resource subset, and a preamble sequence repetition number N transmitted by the UE on each random access channel resource subset. When the random access channel used by the UE is selected by the UE, the first type of random access resources includes a range of a first type of preamble sequence index, time-frequency resource allocation information (which indicates a specific value of a time-frequency resource position coordinate) of a first random access channel of the random access channel resource subset, the number M, UE of random access channels in the random access resource subset, and the number N of preamble sequence repetitions sent by the UE on each random access channel resource subset, and the UE selects the random access channel in the specified random access channel resource subset in an equiprobability manner for sending the preamble sequence.

The second type of random access resources includes a range of second type preamble sequence indexes, time-frequency resource allocation information (which refers to a specific value representing a time-frequency resource position coordinate) of a first random access channel of the random access channel resource subset, and the number M, UE of random access channels in the random access resource subset, which is the number N of preamble sequence repetitions sent on each random access channel resource subset. UEs without beam reciprocity transmit the preamble sequence on a random access channel in a subset of random access channel resources specified by the base station.

The above description is directed to the case where the random access channels in the random access channel resource subset are continuously distributed in the time domain. In practice the individual random access channels in the subset of random access channel resources may be discretely distributed in the time domain. For this case, the two types of random access resource allocation information should also include the interval between two adjacent random access channels, or inform the time-frequency positions of all available random access channels.

It should be noted that the method provided in this embodiment is equally applicable to non-contention based random access procedures. Specifically, to support the non-contention based random access procedure, the base station needs to divide the total available random access preamble sequences into two classes, one for the contention based random access procedure and the other for the non-contention based random access procedure. If the base station cannot know whether the UE has beam reciprocity, each type of preamble sequence is further divided into the preamble sequences used in the random access process for the UE with beam reciprocity and the UE without beam reciprocity. If the base station is able to determine whether the UE has beam reciprocity, the preamble sequence for the non-contention based random access procedure does not need to be further grouped.

Example 4

The present embodiment introduces the application procedure of the above method from the UE side.

1. Random access procedure initialization:

before the random access procedure is initialized, it should be assumed that the following information is available:

-a first type of random access time-frequency resource configuration information and a second type of random access time-frequency resource configuration information for preamble sequence transmission.

-preamble sequence configuration information.

If the method in embodiment 1 or 2 is adopted, the preamble configuration information includes an available preamble index range.

If the method in embodiment 3 is adopted, the preamble configuration information includes an index range of the first type of random access preamble and an index range of the second type of random access preamble.

The random access procedure is initialized as follows:

-empty the message 3 cache;

-setting a COUNTER preamble_transmission_counter to 1;

-setting the backoff parameter value to 0ms;

-performing a random access resource selection procedure.

2. Random access resource selection

The random access procedure should be performed as follows:

-determining a beam reciprocity situation. If beam reciprocity exists, then

-selecting a first type of random access time-frequency resources and/or a first type of random access preamble sequence index range;

if there is no beam reciprocity, then

-selecting a second type of random access resource and/or a second type of random access preamble sequence index range;

-determining a next available subframe comprising a subset of random access channel resources according to the selected random access resource configuration.

-selecting a preamble sequence with equal probability in the selected preamble sequence index range;

-transmitting a preamble sequence.

3. Transmission of random access preamble sequences

The random access procedure should be performed as follows:

-instructing the physical layer to transmit the respective preamble sequence using the selected subset of random access channel resources, the respective RA-RNTI, the preamble sequence index and the preamble sequence transmit power.

It should be noted that the above procedure gives an application case of the contention-based random access procedure. For non-contention based random access procedures, the preamble index is configured by higher layer signaling, and the random access time-frequency resources may also be configured by higher layer signaling.

Referring to fig. 13, a base station apparatus for random access configuration according to this embodiment includes:

a configuration information determining module, configured to determine random access resource configuration information, where the random access resource configuration information includes random access resource information for beam reciprocal UEs and random access resource information for non-beam reciprocal UEs;

And the transmission configuration information module is used for transmitting the random access resource configuration information to the UE so as to allow the UE to select corresponding random access resources to transmit a random access request containing a preamble sequence according to the self beam reciprocity condition and the random access resource configuration information.

The working processes of determining the configuration information module and sending the configuration information module correspond to steps 101 and 102 of the random access configuration method in this embodiment, and are not described herein again.

Referring to fig. 14, the ue for random access request in this embodiment includes:

the receiving configuration information module is used for receiving random access resource configuration information sent by the base station, wherein the random access resource configuration information comprises random access resource information for the beam reciprocity UE and random access resource information for the non-beam reciprocity UE;

and the preamble sequence sending module is used for selecting corresponding random access resources to send random access requests containing preamble sequences according to the beam reciprocity condition of the local end and the random access resource configuration information.

The working processes of the configuration information receiving module and the preamble sequence sending module correspond to steps 201 and 202 of the random access request method in this embodiment, and are not described herein again.

As can be seen from the above detailed description of the present embodiment, compared with the prior art, the present embodiment has at least the following beneficial technical effects:

firstly, the available random access resources are divided into two types, one type is configured for the UE with beam reciprocity, the other type is configured for the UE without beam reciprocity, the random access processes of the two types of UE are integrated, the degradation of the UE access performance caused by improper resource configuration is avoided, and the overall access performance of the high-frequency communication system is obviously improved.

Secondly, the base station determines random access resource configuration information according to the self beam reciprocity condition, implicitly informs the self beam reciprocity information in the system information, and feeds back an optimal random access channel resource subset of the UE in the random access response, so that the UE obtains optimal beam pairing with the base station, the beam pairing of multi-beam communication is realized on the basis of not increasing interaction steps, the service delay and signaling interaction cost of parameter transmission are reduced, and the system efficiency is improved.

Third, the base station broadcasts the random access resource configuration information through the synchronous signal block of the downlink synchronization, so that the interaction step of the random access process is simplified, and the method is applicable to two situations of the random access process based on competition and non-competition, and provides lower access delay and better access experience for users.

Fourth, in the process of combining beam pairing into downlink synchronization, different downlink synchronization signal blocks correspond to different base station transmitting beam directions, so that the data transmission flow is simplified, the system bandwidth is increased, and the transmission rate of the system is greatly improved.

Fifthly, two types of random access resources are distinguished by providing a preamble sequence code and a time-frequency resource, and a plurality of time-frequency resource arrangements, a random access channel resource subset and a random access channel combined configuration mode are provided, so that the flexibility of resource configuration is improved, and the detection success rate and the access efficiency are improved.

In the several examples provided in this detailed description, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

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

In addition, each functional unit in each embodiment of the present embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be implemented by a program to instruct related hardware, the program may be stored in a computer readable storage medium, and the storage medium may include: read Only Memory (ROM), random access Memory (RAM, random Access Memory), magnetic or optical disk, and the like.

While the method and apparatus provided in this embodiment have been described in detail, those skilled in the art will recognize that there are variations to the embodiments and the application scope of the embodiments according to the ideas of the examples of this embodiment, and the disclosure should not be construed as limiting the embodiments.

Claims

1. A method performed by a user equipment, UE, in a wireless communication system, characterized by: the method comprises the following steps:

receiving random access resource configuration information sent by a base station through a synchronous signal block of downlink synchronization, wherein the random access resource configuration information comprises random access resource information for UE with beam reciprocity and random access resource information for UE without beam reciprocity;

2. The method of claim 1, wherein: the random access resource information for the UE with beam reciprocity or/and the random access resource information for the UE without beam reciprocity comprise: the number of preamble sequence repetitions contained in each random access channel.

3. The method of claim 1, wherein: each synchronization signal block carries random access resource information for the UE with beam reciprocity and random access resource information for the UE without beam reciprocity.

4. A method as claimed in claim 3, wherein:

the random access resource information for the UE with beam reciprocity carried by each synchronous signal block comprises: relevant information of a UE random access channel resource subset with beam reciprocity correspondingly; the relevant information of the corresponding random access channel resource subset of the UE with beam reciprocity is used for determining: the time-frequency resource position of the random access channel resource subset of the UE with beam reciprocity is corresponding, or the time-frequency resource position of one random access channel in the random access channel resource subset of the UE with beam reciprocity is corresponding;

the random access resource information for the UE without beam reciprocity carried by each synchronization signal block includes: relevant information of a UE random access channel resource subset without beam reciprocity is corresponding; the information about the subset of corresponding UE random access channel resources without beam reciprocity is used to determine: and the time-frequency resource position of the random access channel resource subset of the UE which does not have the beam reciprocity is corresponding, and the number of the random access channels contained in the random access channel resource subset of the UE which does not have the beam reciprocity is corresponding.

5. The method of claim 4, wherein:

the relevant information of the corresponding random access channel resource subset of the UE with beam reciprocity comprises the following steps: time-frequency resource allocation information of a random access channel resource subset of the UE with beam reciprocity correspondingly, or time-frequency resource allocation information of a random access channel of the random access channel resource subset of the UE with beam reciprocity correspondingly;

the relevant information of the corresponding random access channel resource subset of the UE without beam reciprocity comprises the following steps: and the time-frequency resource allocation information of the random access channel resource subset of the UE which does not have the beam reciprocity is corresponding to the time-frequency resource allocation information of the random access channel resource subset of the UE which does not have the beam reciprocity, and the number of the random access channels contained in the random access channel resource subset of the UE which does not have the beam reciprocity is corresponding to the time-frequency resource allocation information of the random access channel resource subset of the UE.

6. The method of claim 4, wherein:

the relevant information of the corresponding random access channel resource subset of the UE with beam reciprocity comprises the following steps: the method comprises the steps of correspondingly carrying out time-frequency resource allocation information of a random access channel resource subset of the UE with beam reciprocity, and carrying out the number and the random access channel interval of random access channels contained in the random access channel resource subset of the UE with beam reciprocity.

7. The method of any one of claims 4-6, wherein:

the random access resource information for the UE with beam reciprocity carried by each synchronization signal block further includes: the UE preamble sequence index range with beam reciprocity;

the random access resource information for the UE without beam reciprocity carried by each synchronization signal block further includes: the UE preamble sequence index range does not have beam reciprocity.

8. The method of claim 2, wherein:

the random access resource information for the UE with beam reciprocity carried by each synchronous signal block comprises: the UE preamble sequence with beam reciprocity and the related information of the UE random access channel resource with beam reciprocity are provided; the related information of the random access channel resource of the UE with beam reciprocity is used for determining: the time-frequency resource positions of the random access channel resource subsets of the UE with beam reciprocity are corresponding, or the time-frequency resource positions of the random access channels contained in the random access channel resource subsets of the UE with beam reciprocity are corresponding;

The random access resource information for the UE without beam reciprocity carried by each synchronization signal block includes: the UE preamble sequence without beam reciprocity and the related information of the UE random access channel resource without beam reciprocity are provided correspondingly; the relevant information of the corresponding UE random access channel resources without beam reciprocity is used for determining: and the time-frequency resource positions of all random access channel resource subsets in the random access channel resources of the UE without beam reciprocity are corresponding, and the number of the random access channels contained in the random access channel resource subsets.

9. The method as recited in claim 8, wherein:

the related information of the corresponding UE random access channel resource with beam reciprocity comprises: time-frequency resource allocation information of each random access channel resource subset in the random access channel resources of the UE with beam reciprocity correspondingly, or time-frequency resource allocation information of each random access channel contained in each random access channel resource subset in the random access channel resources of the UE with beam reciprocity correspondingly;

the relevant information of the corresponding UE random access channel resources without beam reciprocity comprises: and the time-frequency resource allocation information of each random access channel resource subset in the random access channel resources of the UE without beam reciprocity is corresponding to the number of the random access channels contained in the random access channel resource subsets.

10. The method of claim 1, wherein: according to the beam reciprocity capability of the local terminal and the random access resource configuration information, the step of selecting the corresponding random access resource to send the preamble sequence comprises the following steps:

and receiving a random access response fed back by the base station aiming at the preamble sequence, determining the optimal sending beam direction of the local terminal according to the random access response, and sending a message III by using the optimal sending beam direction.

11. A method performed by a base station in a wireless communication system, characterized by: the method comprises the following steps:

and sending the random access resource configuration information to the UE through a synchronizing signal block of downlink synchronization.

12. The method of claim 11, wherein: the determining random access resource configuration information includes: and determining random access resource configuration information according to the beam reciprocity capability of the local terminal.

13. The method as recited in claim 12, wherein: the random access resource information for the UE with beam reciprocity or/and the random access resource information for the UE without beam reciprocity comprise: the number of preamble sequence repetitions contained in each random access channel.

14. The method of claim 11, wherein: each synchronization signal block carries random access resource information for the UE with beam reciprocity and random access resource information for the UE without beam reciprocity.

15. The method as recited in claim 14, wherein:

16. The method of claim 15, wherein:

17. The method of claim 15, wherein:

18. The method of any one of claims 15-17, wherein:

19. The method as recited in claim 14, wherein:

20. The method of claim 19, wherein:

21. The method of claim 11, wherein: after the step of sending the random access resource configuration information to the UE, the method includes:

and transmitting index information of an optimal random access channel of the UE to the UE through a random access response, wherein the optimal random access channel comprises a random access channel with the strongest preamble sequence detection energy.

22. A base station apparatus, comprising:

and the sending configuration information module is used for sending the random access resource configuration information to the UE through a synchronizing signal block of downlink synchronization.

23. The base station apparatus of claim 22, wherein: and the configuration information determining module is used for determining random access resource configuration information according to the beam reciprocity capability of the local terminal.

24. The base station apparatus of claim 23, wherein: the random access resource information for the UE with beam reciprocity or/and the random access resource information for the UE without beam reciprocity comprise: the number of preamble sequence repetitions contained in each random access channel.

25. The base station apparatus of claim 22, wherein: each synchronization signal block carries random access resource information for the UE with beam reciprocity and random access resource information for the UE without beam reciprocity.

26. The base station apparatus of claim 25, wherein:

27. The base station apparatus of claim 26, wherein:

28. The base station apparatus of claim 26, wherein:

29. The base station apparatus according to any of claims 26-28, wherein:

30. The base station apparatus of claim 25, wherein:

31. The base station apparatus of claim 30, wherein:

32. The base station apparatus of claim 22, wherein: the system also comprises a first sending module;

and the first sending module is used for sending index information of an optimal random access channel of the UE to the UE through a random access response, wherein the optimal random access channel comprises a random access channel with the strongest preamble sequence detection energy.

33. A user device, comprising:

a receiving configuration information module, configured to receive random access resource configuration information sent by a base station through a synchronization signal block of downlink synchronization, where the random access resource configuration information includes random access resource information for a UE with beam reciprocity and random access resource information for a UE without beam reciprocity;

34. The user device of claim 33, wherein: the random access resource information for the UE with beam reciprocity or/and the random access resource information for the UE without beam reciprocity comprise: the number of preamble sequence repetitions contained in each random access channel.

35. The user device of claim 33, wherein: each synchronization signal block carries random access resource information for the UE with beam reciprocity and random access resource information for the UE without beam reciprocity.

36. The user device of claim 35, wherein:

37. The user device of claim 36, wherein:

38. The user device of claim 36, wherein:

39. The user equipment according to any of claims 36-38, wherein:

40. The user device of claim 35, wherein:

41. The user equipment of claim 40, wherein:

42. The user device of claim 33, wherein: the system also comprises a first receiving module;

and the first receiving module is used for receiving the random access response fed back by the base station aiming at the preamble sequence, determining the optimal sending beam direction of the local terminal according to the random access response, and sending a message III by using the optimal sending beam direction.

43. A user equipment comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of any of claims 1-10 when executing the program.

44. A base station device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of any of claims 11-21 when executing the program.

45. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the method of any of claims 1-21.